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	diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
	index 0497a08..0baba59 100644
	--- a/src/MainWindow.cpp
	+++ b/src/MainWindow.cpp
	@@ -1,4569 +1,4570 @@
	#include "AreYouSureYouWantToContinueConnectingDialog.h"
	#include "BlameWindow.h"
	#include "CommitViewWindow.h"
	#include "Git.h"
	#include "LineEditDialog.h"
	#include "MainWindow.h"
	#include "ReflogWindow.h"
	#include "SetGlobalUserDialog.h"
	#include "EditTagsDialog.h"
	#include "WelcomeWizardDialog.h"
	#include "ui_MainWindow.h"
	#include "EditGitIgnoreDialog.h"

	#ifdef Q_OS_WIN
	#include "win32/win32.h"
	#else
	#include <unistd.h>
	#endif

	#include "ApplicationGlobal.h"
	#include "AboutDialog.h"
	#include "AvatarLoader.h"
	#include "CheckoutDialog.h"
	#include "CloneDialog.h"
	#include "CommitExploreWindow.h"
	#include "CommitPropertyDialog.h"
	#include "common/joinpath.h"
	#include "common/misc.h"
	#include "ConfigCredentialHelperDialog.h"
	#include "CreateRepositoryDialog.h"
	#include "DeleteBranchDialog.h"
	#include "DeleteTagsDialog.h"
	#include "InputNewTagDialog.h"
	#include "FileHistoryWindow.h"
	#include "FilePropertyDialog.h"
	#include "FileUtil.h"
	#include "Git.h"
	#include "GitDiff.h"
	#include "gunzip.h"
	#include "JumpDialog.h"
	#include "LocalSocketReader.h"
	#include "main.h"
	#include "MemoryReader.h"
	#include "MergeBranchDialog.h"
	#include "MyProcess.h"
	#include "MySettings.h"
	#include "PushDialog.h"
	#include "RepositoryData.h"
	#include "RepositoryPropertyDialog.h"
	#include "SelectCommandDialog.h"
	#include "SetRemoteUrlDialog.h"
	#include "SettingsDialog.h"
	#include "SetUserDialog.h"
	#include "StatusLabel.h"
	#include "Terminal.h"
	#include "TextEditDialog.h"
	#include "CommitDialog.h"
	#include "SelectGpgKeyDialog.h"
	#include "SetGpgSigningDialog.h"
	#include "gpg.h"
	#include "webclient.h"
	#include <deque>
	#include <set>
	#include <stdlib.h>

	#include <QBuffer>
	#include <QDateTime>
	#include <QDebug>
	#include <QDesktopServices>
	#include <QDirIterator>
	#include <QDragEnterEvent>
	#include <QFileDialog>
	#include <QFileIconProvider>
	#include <QKeyEvent>
	#include <QLocalServer>
	#include <QMessageBox>
	#include <QMimeData>
	#include <QPainter>
	#include <QProcess>
	#include <QStandardPaths>
	#include <QThread>
	#include <QTimer>

	#ifdef Q_OS_MAC
	extern "C" char **environ;
	#endif

	struct GitHubRepositoryInfo {
	QString owner_account_name;
	QString repository_name;
	};

	class AsyncExecGitThread_ : public QThread {
	private:
	GitPtr g;
	std::function<void(GitPtr g)> callback;
	public:
	AsyncExecGitThread_(GitPtr g, std::function<void(GitPtr g)> callback)
	: g(g)
	, callback(callback)
	{
	}
	protected:
	void run()
	{
	callback(g);
	}
	};

	FileDiffWidget::DrawData::DrawData()
	{
	bgcolor_text = QColor(255, 255, 255);
	bgcolor_gray = QColor(224, 224, 224);
	bgcolor_add = QColor(192, 240, 192);
	bgcolor_del = QColor(255, 224, 224);
	bgcolor_add_dark = QColor(64, 192, 64);
	bgcolor_del_dark = QColor(240, 64, 64);
	}

	enum {
	IndexRole = Qt::UserRole,
	FilePathRole,
	DiffIndexRole,
	HunkIndexRole,
	};

	enum {
	GroupItem = -1,
	};

	static inline bool isGroupItem(QTreeWidgetItem *item)
	{
	if (item) {
	int index = item->data(0, IndexRole).toInt();
	if (index == GroupItem) {
	return true;
	}
	}
	return false;
	}

	static inline QString getFilePath(QListWidgetItem *item)
	{
	if (!item) return QString();
	return item->data(FilePathRole).toString();
	}

	static inline int indexOfLog(QListWidgetItem *item)
	{
	if (!item) return -1;
	return item->data(IndexRole).toInt();
	}

	static inline int indexOfDiff(QListWidgetItem *item)
	{
	if (!item) return -1;
	return item->data(DiffIndexRole).toInt();
	}

	static inline int getHunkIndex(QListWidgetItem *item)
	{
	if (!item) return -1;
	return item->data(HunkIndexRole).toInt();
	}

	enum class PtyCondition {
	None,
	Clone,
	Fetch,
	Pull,
	Push,
	};

	enum InteractionMode {
	None,
	Busy,
	};

	struct MainWindow::Private {
	QString starting_dir;
	Git::Context gcx;
	ApplicationSettings appsettings;
	QList<RepositoryItem> repos;
	RepositoryItem current_repo;
	ServerType server_type = ServerType::Standard;
	GitHubRepositoryInfo github;
	Git::Branch current_branch;
	QString head_id;
	struct Diff {
	QList<Git::Diff> result;
	std::shared_ptr<QThread> thread;
	QList<std::shared_ptr<QThread>> garbage;
	} diff;
	std::map<QString, Git::Diff> diff_cache;
	QStringList added;
	Git::CommitItemList logs;
	std::map<int, QList<Label>> label_map;
	bool uncommited_changes = false;
	int update_files_list_counter = 0;
	QTimer interval_10ms_timer;
	QImage graph_color;
	QStringList remotes;
	std::map<QString, QList<Git::Branch>> branch_map;
	std::map<QString, QList<Git::Tag>> tag_map;
	QString repository_filter_text;
	QPixmap digits;
	QIcon repository_icon;
	QIcon folder_icon;
	QIcon signature_good_icon;
	QIcon signature_dubious_icon;
	QIcon signature_bad_icon;
	unsigned int temp_file_counter = 0;
	GitObjectCache objcache;
	QPixmap transparent_pixmap;
	StatusLabel *status_bar_label;

	WebContext webcx;
	AvatarLoader avatar_loader;
	int update_commit_table_counter = 0;

	std::map<QString, GitHubAPI::User> committer_map; // key is email

	PtyProcess pty_process;
	PtyCondition pty_condition = PtyCondition::None;
	bool pty_process_ok = false;

	RepositoryItem temp_repo;

	QListWidgetItem *last_selected_file_item = nullptr;


	InteractionMode interaction_mode = InteractionMode::None;
	bool interaction_canceled = false;
	};

	MainWindow::MainWindow(QWidget *parent)
	: QMainWindow(parent)
	, ui(new Ui::MainWindow)
	, m(new Private)
	{
	ui->setupUi(this);

	m->starting_dir = QDir::current().absolutePath();

	ui->splitter_v->setSizes({100, 400});
	ui->splitter_h->setSizes({200, 100, 200});

	m->status_bar_label = new StatusLabel(this);
	ui->statusBar->addWidget(m->status_bar_label);

	ui->widget_diff_view->bind(this);

	qApp->installEventFilter(this);
	ui->treeWidget_repos->installEventFilter(this);
	ui->tableWidget_log->installEventFilter(this);
	ui->listWidget_staged->installEventFilter(this);
	ui->listWidget_unstaged->installEventFilter(this);

	ui->widget_log->setupForLogWidget(ui->verticalScrollBar_log, ui->horizontalScrollBar_log, themeForTextEditor());
	onLogVisibilityChanged();

	SettingsDialog::loadSettings(&m->appsettings);

	initNetworking();

	showFileList(FilesListType::SingleList);

	QFileIconProvider icons;

	m->digits.load(":/image/digits.png");
	m->graph_color = global->theme->graphColorMap();

	m->repository_icon = QIcon(":/image/repository.png");
	m->folder_icon = icons.icon(QFileIconProvider::Folder);

	m->signature_good_icon = QIcon(":/image/signature-good.png");
	m->signature_bad_icon = QIcon(":/image/signature-bad.png");
	m->signature_dubious_icon = QIcon(":/image/signature-dubious.png");

	prepareLogTableWidget();

	#ifdef Q_OS_WIN
	{
	QFont font;

	font = ui->label_repo_name->font();
	font.setFamily("Meiryo");
	ui->label_repo_name->setFont(font);

	font = ui->label_branch_name->font();
	font.setFamily("Meiryo");
	ui->label_branch_name->setFont(font);
	}
	#endif

	connect(ui->dockWidget_log, SIGNAL(visibilityChanged(bool)), this, SLOT(onLogVisibilityChanged()));
	connect(ui->widget_log, SIGNAL(idle()), this, SLOT(onLogIdle()));

	connect(ui->treeWidget_repos, SIGNAL(dropped()), this, SLOT(onRepositoriesTreeDropped()));

	connect((AbstractPtyProcess *)&m->pty_process, SIGNAL(completed()), this, SLOT(onPtyProcessCompleted()));


	QString path = getBookmarksFilePath();
	m->repos = RepositoryBookmark::load(path);
	updateRepositoriesList();

	m->webcx.set_keep_alive_enabled(true);
	m->avatar_loader.start(&m->webcx);
	connect(&m->avatar_loader, SIGNAL(updated()), this, SLOT(onAvatarUpdated()));

	m->update_files_list_counter = 0;

	connect(ui->widget_diff_view, &FileDiffWidget::textcodecChanged, [&](){ updateDiffView(); });

	if (!global->start_with_shift_key && appsettings()->remember_and_restore_window_position) {
	Qt::WindowStates state = windowState();
	MySettings settings;

	settings.beginGroup("MainWindow");
	bool maximized = settings.value("Maximized").toBool();
	restoreGeometry(settings.value("Geometry").toByteArray());
	// ui->splitter->restoreState(settings.value("SplitterState").toByteArray());
	settings.endGroup();
	if (maximized) {
	state \|= Qt::WindowMaximized;
	setWindowState(state);
	}
	}

	startTimers();
	}

	MainWindow::~MainWindow()
	{
	stopPtyProcess();

	m->avatar_loader.interrupt();
	m->avatar_loader.wait();

	deleteTempFiles();

	delete m;
	delete ui;
	}

	bool MainWindow::checkGitCommand()
	{
	while (1) {
	if (misc::isExecutable(m->gcx.git_command)) {
	return true;
	}
	if (selectGitCommand(true).isEmpty()) {
	close();
	return false;
	}
	}
	}

	bool MainWindow::checkFileCommand()
	{
	while (1) {
	if (misc::isExecutable(global->file_command)) {
	return true;
	}
	if (selectFileCommand(true).isEmpty()) {
	close();
	return false;
	}
	}
	}

	ApplicationSettings *MainWindow::appsettings()
	{
	return &m->appsettings;
	}

	ApplicationSettings const *MainWindow::appsettings() const
	{
	return &m->appsettings;
	}

	bool MainWindow::execWelcomeWizardDialog()
	{
	WelcomeWizardDialog dlg(this);
	dlg.set_git_command_path(appsettings()->git_command);
	dlg.set_file_command_path(appsettings()->file_command);
	dlg.set_default_working_folder(appsettings()->default_working_dir);
	if (misc::isExecutable(appsettings()->git_command)) {
	m->gcx.git_command = appsettings()->git_command;
	Git g(m->gcx, QString());
	Git::User user = g.getUser(Git::Source::Global);
	dlg.set_user_name(user.name);
	dlg.set_user_email(user.email);
	}
	if (dlg.exec() == QDialog::Accepted) {
	appsettings()->git_command = m->gcx.git_command = dlg.git_command_path();
	appsettings()->file_command = global->file_command = dlg.file_command_path();
	appsettings()->default_working_dir = dlg.default_working_folder();
	SettingsDialog::saveSettings(&m->appsettings);

	if (misc::isExecutable(appsettings()->git_command)) {
	GitPtr g = git();
	Git::User user;
	user.name = dlg.user_name();
	user.email = dlg.user_email();
	g->setUser(user, true);
	}

	return true;
	}
	return false;
	}

	bool MainWindow::shown()
	{
	while (!misc::isExecutable(appsettings()->git_command) \|\| !misc::isExecutable(appsettings()->file_command)) {
	if (!execWelcomeWizardDialog()) {
	return false;
	}
	}

	setGitCommand(appsettings()->git_command, false);
	setFileCommand(appsettings()->file_command, false);

	writeLog(AboutDialog::appVersion() + '\n'); // print application version
	logGitVersion(); // print git command version

	setGpgCommand(appsettings()->gpg_command, false);

	{
	MySettings s;
	s.beginGroup("Remote");
	bool f = s.value("Online", true).toBool();
	s.endGroup();
	setRemoteOnline(f);
	}

	setUnknownRepositoryInfo();

	checkUser();

	return true;
	}

	WebContext *MainWindow::webContext()
	{
	return &m->webcx;
	}

	void MainWindow::startTimers()
	{
	// interval 10ms

	connect(&m->interval_10ms_timer, &QTimer::timeout, [&](){
	const int ms = 10;
	if (m->update_commit_table_counter > 0) {
	if (m->update_commit_table_counter > ms) {
	m->update_commit_table_counter -= ms;
	} else {
	m->update_commit_table_counter = 0;
	ui->tableWidget_log->viewport()->update();
	}
	}
	if (m->update_files_list_counter > 0) {
	if (m->update_files_list_counter > ms) {
	m->update_files_list_counter -= ms;
	} else {
	m->update_files_list_counter = 0;
	updateCurrentFilesList();
	}
	}
	});
	m->interval_10ms_timer.setInterval(10);
	m->interval_10ms_timer.start();

	startTimer(10);
	}

	TextEditorThemePtr MainWindow::themeForTextEditor()
	{
	return global->theme->text_editor_theme;
	}

	void MainWindow::setCurrentLogRow(int row)
	{
	if (row >= 0 && row < ui->tableWidget_log->rowCount()) {
	ui->tableWidget_log->setCurrentCell(row, 2);
	ui->tableWidget_log->setFocus();
	updateStatusBarText();
	}
	}

	bool MainWindow::event(QEvent *event)
	{
	QEvent::Type et = event->type();
	if (et == QEvent::KeyPress) {
	QKeyEvent e = dynamic_cast<QKeyEvent >(event);
	Q_ASSERT(e);
	int k = e->key();
	if (k == Qt::Key_Escape) {
	emit onEscapeKeyPressed();
	} else if (k == Qt::Key_Delete) {
	if (focusWidget() == ui->treeWidget_repos) {
	removeSelectedRepositoryFromBookmark(true);
	return true;
	}
	}
	}

	return QMainWindow::event(event);
	}

	bool MainWindow::eventFilter(QObject watched, QEvent event)
	{
	QEvent::Type et = event->type();

	if (et == QEvent::KeyPress) {
	QKeyEvent e = dynamic_cast<QKeyEvent >(event);
	Q_ASSERT(e);
	int k = e->key();
	if (watched == ui->treeWidget_repos) {
	if (k == Qt::Key_Enter \|\| k == Qt::Key_Return) {
	openSelectedRepository();
	return true;
	}
	if (!(e->modifiers() & Qt::ControlModifier)) {
	if (k >= 0 && k < 128 && QChar((uchar)k).isLetterOrNumber()) {
	appendCharToRepoFilter(k);
	return true;
	}
	if (k == Qt::Key_Backspace) {
	backspaceRepoFilter();
	return true;
	}
	if (k == Qt::Key_Escape) {
	clearRepoFilter();
	return true;
	}
	}
	if (k == Qt::Key_Tab) {
	ui->tableWidget_log->setFocus();
	return true;
	}
	} else if (watched == ui->tableWidget_log) {
	if (k == Qt::Key_Home) {
	setCurrentLogRow(0);
	return true;
	}
	if (k == Qt::Key_Escape) {
	ui->treeWidget_repos->setFocus();
	return true;
	}
	if (k == Qt::Key_Tab) {
	// consume the event
	return true;
	}
	} else if (watched == ui->listWidget_files \|\| watched == ui->listWidget_unstaged \|\| watched == ui->listWidget_staged) {
	if (k == Qt::Key_Escape) {
	ui->tableWidget_log->setFocus();
	return true;
	}
	}
	} else if (et == QEvent::FocusIn) {
	// ファイルリストがフォーカスを得たとき、diffビューを更新する。（コンテキストメニュー対応）
	if (watched == ui->listWidget_unstaged) {
	updateStatusBarText();
	updateUnstagedFileCurrentItem();
	return true;
	}
	if (watched == ui->listWidget_staged) {
	updateStatusBarText();
	updateStagedFileCurrentItem();
	return true;
	}
	}
	return false;
	}

	void MainWindow::closeEvent(QCloseEvent *event)
	{
	if (appsettings()->remember_and_restore_window_position) {
	setWindowOpacity(0);
	Qt::WindowStates state = windowState();
	bool maximized = (state & Qt::WindowMaximized) != 0;
	if (maximized) {
	state &= ~Qt::WindowMaximized;
	setWindowState(state);
	}
	{
	MySettings settings;

	settings.beginGroup("MainWindow");
	settings.setValue("Maximized", maximized);
	settings.setValue("Geometry", saveGeometry());
	// settings.setValue("SplitterState", ui->splitter->saveState());
	settings.endGroup();
	}
	}
	QMainWindow::closeEvent(event);
	}

	void MainWindow::setStatusBarText(QString const &text)
	{
	m->status_bar_label->setText(text);
	}

	void MainWindow::clearStatusBarText()
	{
	setStatusBarText(QString());
	}

	WebContext *MainWindow::getWebContextPtr()
	{
	return &m->webcx;
	}

	QString MainWindow::getObjectID(QListWidgetItem *item)
	{
	int i = indexOfDiff(item);
	if (i >= 0 && i < m->diff.result.size()) {
	Git::Diff const &diff = m->diff.result[i];
	return diff.blob.a_id;
	}
	return QString();
	}

	void MainWindow::onLogVisibilityChanged()
	{
	ui->action_window_log->setChecked(ui->dockWidget_log->isVisible());
	}

	void MainWindow::writeLog(char const *ptr, int len)
	{
	+ ui->widget_log->logicalMoveToBottom();
	ui->widget_log->write(ptr, len, false);
	ui->widget_log->setChanged(false);
	m->interaction_canceled = false;
	}

	void MainWindow::writeLog(const QString &str)
	{
	std::string s = str.toStdString();
	writeLog(s.c_str(), s.size());
	}

	void MainWindow::writeLog(QByteArray ba)
	{
	QString s = QString::fromUtf8(ba);
	writeLog(s);
	}

	bool MainWindow::saveRepositoryBookmarks() const
	{
	QString path = getBookmarksFilePath();
	return RepositoryBookmark::save(path, &m->repos);
	}

	void MainWindow::saveRepositoryBookmark(RepositoryItem item)
	{
	if (item.local_dir.isEmpty()) return;

	if (item.name.isEmpty()) {
	item.name = tr("Unnamed");
	}

	bool done = false;
	for (int i = 0; i < m->repos.size(); i++) {
	RepositoryItem *p = &m->repos[i];
	if (item.local_dir == p->local_dir) {
	*p = item;
	done = true;
	break;
	}
	}
	if (!done) {
	m->repos.push_back(item);
	}
	saveRepositoryBookmarks();
	updateRepositoriesList();
	}

	void MainWindow::buildRepoTree(QString const &group, QTreeWidgetItem item, QList<RepositoryItem> repos)
	{
	QString name = item->text(0);
	if (isGroupItem(item)) {
	int n = item->childCount();
	for (int i = 0; i < n; i++) {
	QTreeWidgetItem *child = item->child(i);
	QString sub = group / name;
	buildRepoTree(sub, child, repos);
	}
	} else {
	RepositoryItem const *repo = repositoryItem(item);
	if (repo) {
	RepositoryItem newrepo = *repo;
	newrepo.name = name;
	newrepo.group = group;
	item->setData(0, IndexRole, repos->size());
	repos->push_back(newrepo);
	}
	}
	}

	void MainWindow::refrectRepositories()
	{
	QList<RepositoryItem> newrepos;
	int n = ui->treeWidget_repos->topLevelItemCount();
	for (int i = 0; i < n; i++) {
	QTreeWidgetItem *item = ui->treeWidget_repos->topLevelItem(i);
	buildRepoTree(QString(), item, &newrepos);
	}
	m->repos = std::move(newrepos);
	saveRepositoryBookmarks();
	}

	void MainWindow::onRepositoriesTreeDropped()
	{
	refrectRepositories();
	QTreeWidgetItem *item = ui->treeWidget_repos->currentItem();
	if (item) item->setExpanded(true);
	}

	const QPixmap &MainWindow::digitsPixmap() const
	{
	return m->digits;
	}

	int MainWindow::digitWidth() const
	{
	return 5;
	}

	int MainWindow::digitHeight() const
	{
	return 7;
	}

	void MainWindow::drawDigit(QPainter *pr, int x, int y, int n) const
	{
	int w = digitWidth();
	int h = digitHeight();
	pr->drawPixmap(x, y, w, h, m->digits, n * w, 0, w, h);
	}

	QString MainWindow::defaultWorkingDir() const
	{
	return appsettings()->default_working_dir;
	}

	QColor MainWindow::color(unsigned int i)
	{
	unsigned int n = m->graph_color.width();
	if (n > 0) {
	n--;
	if (i > n) i = n;
	QRgb const p = (QRgb const )m->graph_color.scanLine(0);
	return QColor(qRed(p[i]), qGreen(p[i]), qBlue(p[i]));
	}
	return Qt::black;
	}

	bool MainWindow::isThereUncommitedChanges() const
	{
	return m->uncommited_changes;
	}

	Git::CommitItemList const *MainWindow::logs() const
	{
	return &m->logs;
	}

	QString MainWindow::currentWorkingCopyDir() const
	{
	QString workdir = m->current_repo.local_dir;
	if (!workdir.isEmpty()) return workdir;

	QTreeWidgetItem *treeitem = ui->treeWidget_repos->currentItem();
	if (treeitem) {
	RepositoryItem const *repo = repositoryItem(treeitem);
	if (repo) {
	workdir = repo->local_dir;
	return workdir;
	}
	}

	return QString();
	}

	GitPtr MainWindow::git(QString const &dir) const
	{
	const_cast<MainWindow *>(this)->checkGitCommand();

	GitPtr g = std::shared_ptr<Git>(new Git(m->gcx, dir));
	g->setLogCallback(git_callback, (void *)this);
	return g;
	}

	GitPtr MainWindow::git()
	{
	return git(currentWorkingCopyDir());
	}

	bool MainWindow::queryCommit(QString const &id, Git::CommitItem *out)
	{
	*out = Git::CommitItem();
	GitPtr g = git();
	return g->queryCommit(id, out);
	}

	void MainWindow::setLogEnabled(GitPtr g, bool f)
	{
	if (f) {
	g->setLogCallback(git_callback, this);
	} else {
	g->setLogCallback(nullptr, nullptr);
	}
	}

	QString MainWindow::makeRepositoryName(QString const &loc)
	{
	int i = loc.lastIndexOf('/');
	int j = loc.lastIndexOf('\\');
	if (i < j) i = j;
	if (i >= 0) {
	i++;
	j = loc.size();
	if (loc.endsWith(".git")) {
	j -= 4;
	}
	return loc.mid(i, j - i);
	}
	return QString();
	}

	RepositoryItem const MainWindow::findRegisteredRepository(QString workdir) const
	{
	workdir = QDir(workdir).absolutePath();
	workdir->replace('\\', '/');

	for (RepositoryItem const &item : m->repos) {
	Qt::CaseSensitivity cs = Qt::CaseSensitive;
	#ifdef Q_OS_WIN
	cs = Qt::CaseInsensitive;
	#endif
	if (workdir->compare(item.local_dir, cs) == 0) {
	return &item;
	}
	}
	return nullptr;
	}

	int MainWindow::repositoryIndex_(QTreeWidgetItem const *item) const
	{
	if (item) {
	int i = item->data(0, IndexRole).toInt();
	if (i >= 0 && i < m->repos.size()) {
	return i;
	}
	}
	return -1;
	}

	RepositoryItem const MainWindow::repositoryItem(QTreeWidgetItem const item) const
	{
	int row = repositoryIndex_(item);
	if (row >= 0 && row < m->repos.size()) {
	return &m->repos[row];
	}
	return nullptr;
	}

	static QTreeWidgetItem *newQTreeWidgetItem()
	{
	QTreeWidgetItem *item = new QTreeWidgetItem();
	item->setSizeHint(0, QSize(20, 20));
	return item;
	}

	QTreeWidgetItem *MainWindow::newQTreeWidgetFolderItem(QString const &name)
	{
	QTreeWidgetItem *item = newQTreeWidgetItem();
	item->setText(0, name);
	item->setData(0, IndexRole, GroupItem);
	item->setIcon(0, m->folder_icon);
	item->setFlags(item->flags() \| Qt::ItemIsEditable);
	return item;
	}

	void MainWindow::updateRepositoriesList()
	{
	QString path = getBookmarksFilePath();

	m->repos = RepositoryBookmark::load(path);

	QString filter = m->repository_filter_text;

	ui->treeWidget_repos->clear();

	std::map<QString, QTreeWidgetItem *> parentmap;

	for (int i = 0; i < m->repos.size(); i++) {
	RepositoryItem const &repo = m->repos[i];
	if (!filter.isEmpty() && repo.name.indexOf(filter, 0, Qt::CaseInsensitive) < 0) {
	continue;
	}
	QTreeWidgetItem *parent = nullptr;
	{
	QString group = repo.group;
	if (group.startsWith('/')) {
	group = group.mid(1);
	}
	auto it = parentmap.find(group);
	if (it != parentmap.end()) {
	parent = it->second;
	}
	if (!parent) {
	QStringList list = group.split('/', QString::SkipEmptyParts);
	if (list.isEmpty()) {
	list.push_back(tr("Default"));
	}
	for (QString const &name : list) {
	if (name.isEmpty()) continue;
	if (!parent) {
	auto it = parentmap.find(name);
	if (it != parentmap.end()) {
	parent = it->second;
	} else {
	parent = newQTreeWidgetFolderItem(name);
	ui->treeWidget_repos->addTopLevelItem(parent);
	}
	} else {
	QTreeWidgetItem *child = newQTreeWidgetFolderItem(name);
	parent->addChild(child);
	parent = child;
	}
	parent->setExpanded(true);
	}
	Q_ASSERT(parent);
	parentmap[group] = parent;
	}
	parent->setData(0, FilePathRole, "");
	}
	QTreeWidgetItem *child = newQTreeWidgetItem();
	child->setText(0, repo.name);
	child->setData(0, IndexRole, i);
	child->setIcon(0, m->repository_icon);
	child->setFlags(child->flags() & ~Qt::ItemIsDropEnabled);
	parent->addChild(child);
	parent->setExpanded(true);
	}
	}

	void MainWindow::showFileList(FilesListType files_list_type)
	{
	switch (files_list_type) {
	case FilesListType::SingleList:
	ui->stackedWidget->setCurrentWidget(ui->page_files);
	break;
	case FilesListType::SideBySide:
	ui->stackedWidget->setCurrentWidget(ui->page_uncommited);
	break;
	}
	}

	void MainWindow::clearFileList()
	{
	showFileList(FilesListType::SingleList);
	ui->listWidget_unstaged->clear();
	ui->listWidget_staged->clear();
	ui->listWidget_files->clear();
	}

	void MainWindow::clearDiffView()
	{
	ui->widget_diff_view->clearDiffView();
	}

	void MainWindow::clearRepositoryInfo()
	{
	m->head_id = QString();
	m->current_branch = Git::Branch();
	m->server_type = ServerType::Standard;
	m->github = GitHubRepositoryInfo();
	ui->label_repo_name->setText(QString());
	ui->label_branch_name->setText(QString());

	}

	void MainWindow::setRepositoryInfo(QString const &reponame, QString const &brname)
	{
	ui->label_repo_name->setText(reponame);
	ui->label_branch_name->setText(brname);
	}

	void MainWindow::setUnknownRepositoryInfo()
	{
	setRepositoryInfo("---", "");

	Git g(m->gcx, QString());
	Git::User user = g.getUser(Git::Source::Global);
	setWindowTitle_(user);
	}

	bool MainWindow::makeDiff(QString id, QList<Git::Diff> *out)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return false;

	Git::FileStatusList list = g->status();
	m->uncommited_changes = !list.empty();

	if (id.isEmpty() && !isThereUncommitedChanges()) {
	id = m->objcache.revParse("HEAD");
	}

	bool uncommited = (id.isEmpty() && isThereUncommitedChanges());

	GitDiff dm(&m->objcache);
	if (uncommited) {
	dm.diff_uncommited(out);
	} else {
	dm.diff(id, out);
	}

	return true; // success
	}

	void MainWindow::addDiffItems(QList<Git::Diff> const *diff_list, std::function<void(QString const &filename, QString header, int idiff)> add_item)
	{
	for (int idiff = 0; idiff < diff_list->size(); idiff++) {
	Git::Diff const &diff = diff_list->at(idiff);
	QString header;

	switch (diff.type) {
	case Git::Diff::Type::Modify: header = "(chg) "; break;
	case Git::Diff::Type::Copy: header = "(cpy) "; break;
	case Git::Diff::Type::Rename: header = "(ren) "; break;
	case Git::Diff::Type::Create: header = "(add) "; break;
	case Git::Diff::Type::Delete: header = "(del) "; break;
	case Git::Diff::Type::ChType: header = "(chg) "; break;
	case Git::Diff::Type::Unmerged: header = "(unmerged) "; break;
	}

	add_item(diff.path, header, idiff);
	}
	}

	void MainWindow::updateFilesList(QString id, bool wait)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	if (!wait) return;

	clearFileList();

	Git::FileStatusList stats = g->status();
	m->uncommited_changes = !stats.empty();

	FilesListType files_list_type = FilesListType::SingleList;

	bool staged = false;
	auto AddItem = [&](QString const &filename, QString header, int idiff){
	if (header.isEmpty()) {
	header = "(??\?) "; // damn trigraph
	}
	QListWidgetItem *item = new QListWidgetItem(header + filename);
	item->setData(FilePathRole, filename);
	item->setData(DiffIndexRole, idiff);
	item->setData(HunkIndexRole, -1);
	switch (files_list_type) {
	case FilesListType::SingleList:
	ui->listWidget_files->addItem(item);
	break;
	case FilesListType::SideBySide:
	if (staged) {
	ui->listWidget_staged->addItem(item);
	} else {
	ui->listWidget_unstaged->addItem(item);
	}
	break;
	}
	};

	if (id.isEmpty()) {
	bool uncommited = isThereUncommitedChanges();
	if (uncommited) {
	files_list_type = FilesListType::SideBySide;
	}
	if (!makeDiff(uncommited ? QString() : id, &m->diff.result)) {
	return;
	}

	std::map<QString, int> diffmap;

	for (int idiff = 0; idiff < m->diff.result.size(); idiff++) {
	Git::Diff const &diff = m->diff.result[idiff];
	QString filename = diff.path;
	if (!filename.isEmpty()) {
	diffmap[filename] = idiff;
	}
	}

	showFileList(files_list_type);

	for (Git::FileStatus const &s : stats) {
	staged = (s.isStaged() && s.code_y() == ' ');
	int idiff = -1;
	QString header;
	auto it = diffmap.find(s.path1());
	if (it != diffmap.end()) {
	idiff = it->second;
	}
	QString path = s.path1();
	if (s.code() == Git::FileStatusCode::Unknown) {
	qDebug() << "something wrong...";
	} else if (s.code() == Git::FileStatusCode::Untracked) {
	// nop
	} else if (s.isUnmerged()) {
	header += "(unmerged) ";
	} else if (s.code() == Git::FileStatusCode::AddedToIndex) {
	header = "(add) ";
	} else if (s.code_x() == 'D' \|\| s.code_y() == 'D' \|\| s.code() == Git::FileStatusCode::DeletedFromIndex) {
	header = "(del) ";
	} else if (s.code_x() == 'R' \|\| s.code() == Git::FileStatusCode::RenamedInIndex) {
	header = "(ren) ";
	path = s.path2(); // renamed newer path
	} else if (s.code_x() == 'M' \|\| s.code_y() == 'M') {
	header = "(chg) ";
	}
	AddItem(path, header, idiff);
	}
	} else {
	if (!makeDiff(id, &m->diff.result)) {
	return;
	}
	showFileList(files_list_type);
	addDiffItems(&m->diff.result, AddItem);
	}

	for (Git::Diff const &diff : m->diff.result) {
	QString key = GitDiff::makeKey(diff);
	m->diff_cache[key] = diff;
	}
	}

	void MainWindow::updateFilesList(QString id, QList<Git::Diff> diff_list, QListWidget listwidget)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	listwidget->clear();

	auto AddItem = [&](QString const &filename, QString header, int idiff){
	if (header.isEmpty()) {
	header = "(??\?) "; // damn trigraph
	}
	QListWidgetItem *item = new QListWidgetItem(header + filename);
	item->setData(FilePathRole, filename);
	item->setData(DiffIndexRole, idiff);
	item->setData(HunkIndexRole, -1);
	listwidget->addItem(item);
	};

	GitDiff dm(&m->objcache);
	if (!dm.diff(id, diff_list)) return;

	addDiffItems(diff_list, AddItem);
	}

	void MainWindow::updateFilesList(Git::CommitItem const &commit, bool wait)
	{
	QString id;
	if (Git::isUncommited(commit)) {
	// empty id for uncommited changes
	} else {
	id = commit.commit_id;
	}
	updateFilesList(id, wait);
	}

	void MainWindow::updateCurrentFilesList()
	{
	QTableWidgetItem *item = ui->tableWidget_log->item(selectedLogIndex(), 0);
	if (!item) return;
	int row = item->data(IndexRole).toInt();
	int logs = (int)m->logs.size();
	if (row < logs) {
	updateFilesList(m->logs[row], true);
	}
	}

	void MainWindow::prepareLogTableWidget()
	{
	QStringList cols = {
	tr("Graph"),
	tr("Commit"),
	tr("Date"),
	tr("Author"),
	tr("Description"),
	};
	int n = cols.size();
	ui->tableWidget_log->setColumnCount(n);
	ui->tableWidget_log->setRowCount(0);
	for (int i = 0; i < n; i++) {
	QString const &text = cols[i];
	QTableWidgetItem *item = new QTableWidgetItem(text);
	ui->tableWidget_log->setHorizontalHeaderItem(i, item);
	}

	updateCommitGraph(); // コミットグラフを更新
	}

	QString MainWindow::currentRepositoryName() const
	{
	return m->current_repo.name;
	}

	Git::Branch const &MainWindow::currentBranch() const
	{
	return m->current_branch;
	}

	bool MainWindow::isValidWorkingCopy(GitPtr const &g) const
	{
	return g && g->isValidWorkingCopy();
	}

	void MainWindow::queryRemotes(GitPtr g)
	{
	m->remotes = g->getRemotes();
	std::sort(m->remotes.begin(), m->remotes.end());
	}

	void MainWindow::queryBranches(GitPtr g)
	{
	Q_ASSERT(g);
	m->branch_map.clear();
	QList<Git::Branch> branches = g->branches();
	for (Git::Branch const &b : branches) {
	if (b.isCurrent()) {
	m->current_branch = b;
	}
	m->branch_map[b.id].append(b);
	}
	}

	void MainWindow::updateRemoteInfo()
	{
	queryRemotes(git());

	QString current_remote;
	{
	Git::Branch const &r = currentBranch();
	current_remote = r.remote;
	}
	if (current_remote.isEmpty()) {
	if (m->remotes.size() == 1) {
	current_remote = m->remotes[0];
	}
	}

	ui->lineEdit_remote->setText(current_remote);
	}

	QList<Git::Branch> MainWindow::findBranch(QString const &id)
	{
	auto it = m->branch_map.find(id);
	if (it != m->branch_map.end()) {
	return it->second;
	}
	return QList<Git::Branch>();
	}

	QString MainWindow::abbrevCommitID(Git::CommitItem const &commit)
	{
	return commit.commit_id.mid(0, 7);
	}

	QString MainWindow::findFileID(GitPtr /g/, const QString &commit_id, const QString &file)
	{
	return lookupFileID(&m->objcache, commit_id, file);
	}

	bool MainWindow::isGitHub() const
	{
	return m->server_type == ServerType::GitHub;
	}

	void MainWindow::updateCommitTableLater()
	{
	m->update_commit_table_counter = 200;
	}

	void MainWindow::onAvatarUpdated()
	{
	updateCommitTableLater();
	}

	bool MainWindow::isAvatarEnabled() const
	{
	return appsettings()->get_committer_icon;
	}

	Git::CommitItem const *MainWindow::commitItem(int row) const
	{
	if (row >= 0 && row < (int)m->logs.size()) {
	return &m->logs[row];
	}
	return nullptr;
	}

	QIcon MainWindow::verifiedIcon(char s) const
	{
	Git::SignatureGrade g = Git::evaluateSignature(s);
	switch (g) {
	case Git::SignatureGrade::Good:
	return m->signature_good_icon;
	case Git::SignatureGrade::Bad:
	return m->signature_bad_icon;
	case Git::SignatureGrade::Unknown:
	case Git::SignatureGrade::Dubious:
	case Git::SignatureGrade::Missing:
	return m->signature_dubious_icon;
	}
	return QIcon();
	}

	QIcon MainWindow::committerIcon(int row) const
	{
	QIcon icon;
	if (isAvatarEnabled()) {
	if (row >= 0 && row < (int)m->logs.size()) {
	Git::CommitItem const &commit = m->logs[row];
	if (commit.email.indexOf('@') > 0) {
	std::string email = commit.email.toStdString();
	icon = m->avatar_loader.fetch(email, true); // from gavatar
	}
	}
	}
	return icon;
	}

	QList<MainWindow::Label> const *MainWindow::label(int row)
	{
	auto it = m->label_map.find(row);
	if (it != m->label_map.end()) {
	return &it->second;
	}
	return nullptr;
	}

	QString MainWindow::makeCommitInfoText(int row, QList<Label> *label_list)
	{
	QString message_ex;
	Git::CommitItem const *commit = &m->logs[row];
	{ // branch
	if (label_list) {
	if (commit->commit_id == m->head_id) {
	Label label(Label::Head);
	label.text = "HEAD";
	label_list->push_back(label);
	}
	}
	QList<Git::Branch> list = findBranch(commit->commit_id);
	for (Git::Branch const &b : list) {
	if (b.flags & Git::Branch::HeadDetached) continue;
	Label label(Label::LocalBranch);
	label.text = b.name;
	if (!b.remote.isEmpty()) {
	label.kind = Label::RemoteBranch;
	label.text = "remotes" / b.remote / label.text;
	}
	if (b.ahead > 0) {
	label.text += tr(", %1 ahead").arg(b.ahead);
	}
	if (b.behind > 0) {
	label.text += tr(", %1 behind").arg(b.behind);
	}
	message_ex += " {" + label.text + '}';
	if (label_list) label_list->push_back(label);
	}
	}
	{ // tag
	QList<Git::Tag> list = findTag(commit->commit_id);
	for (Git::Tag const &t : list) {
	Label label(Label::Tag);
	label.text = t.name;
	message_ex += QString(" {t:%1}").arg(label.text);
	if (label_list) label_list->push_back(label);
	}
	}
	return message_ex;
	}

	void MainWindow::setWindowTitle_(Git::User const &user)
	{
	if (user.name.isEmpty() && user.email.isEmpty()) {
	setWindowTitle(qApp->applicationName());
	} else {
	setWindowTitle(QString("%1 : %2 <%3>")
	.arg(qApp->applicationName())
	.arg(user.name)
	.arg(user.email)
	);
	}
	}

	void MainWindow::updateWindowTitle(GitPtr g)
	{
	if (isValidWorkingCopy(g)) {
	Git::User user = g->getUser(Git::Source::Default);
	setWindowTitle_(user);
	} else {
	setUnknownRepositoryInfo();
	}
	}

	QStringList MainWindow::remotes() const
	{
	return m->remotes;
	}

	int MainWindow::limitLogCount() const
	{
	int n = appsettings()->maximum_number_of_commit_item_acquisitions;
	return (n >= 1 && n <= 100000) ? n : 10000;
	}

	struct TemporaryCommitItem {
	Git::CommitItem const *commit;
	std::vector<TemporaryCommitItem *> children;
	};

	Git::CommitItemList MainWindow::retrieveCommitLog(GitPtr g)
	{
	Git::CommitItemList list = g->log(limitLogCount());

	// 親子関係を調べて、順番が狂っていたら、修正する。

	std::set<QString> set;

	size_t i = 0;
	while (i < list.size()) {
	size_t newpos = -1;
	for (QString const &parent : list[i].parent_ids) {
	auto it = set.find(parent);
	if (it != set.end()) {
	for (size_t j = 0; j < i; j++) {
	if (parent == list[j].commit_id) {
	if (newpos == (size_t)-1 \|\| j < newpos) {
	newpos = j;
	}
	qDebug() << "fix commit order" << parent;
	break;
	}
	}
	}
	}
	set.insert(set.end(), list[i].commit_id);
	if (newpos != (size_t)-1) {
	Git::CommitItem t = list[newpos];
	list.erase(list.begin() + newpos);
	list.insert(list.begin() + i, t);
	}
	i++;
	}

	return list;
	}

	void MainWindow::detectGitServerType(GitPtr g)
	{
	m->server_type = ServerType::Standard;
	m->github = GitHubRepositoryInfo();

	QString push_url;
	QList<Git::Remote> remotes;
	g->getRemoteURLs(&remotes);
	for (Git::Remote const &r : remotes) {
	if (r.purpose == "push") {
	push_url = r.url;
	}
	}

	auto Check = [&](QString const &s){
	int i = push_url.indexOf(s);
	if (i > 0) return i + s.size();
	return 0;
	};

	// check GitHub
	int pos = Check("@github.com:");
	if (pos == 0) {
	pos = Check("://github.com/");
	}
	if (pos > 0) {
	int end = push_url.size();
	{
	QString s = ".git";
	if (push_url.endsWith(s)) {
	end -= s.size();
	}
	}
	QString s = push_url.mid(pos, end - pos);
	int i = s.indexOf('/');
	if (i > 0) {
	QString user = s.mid(0, i);
	QString repo = s.mid(i + 1);
	m->github.owner_account_name = user;
	m->github.repository_name = repo;
	}
	m->server_type = ServerType::GitHub;
	}
	}

	bool MainWindow::fetch(GitPtr g)
	{
	m->pty_condition = PtyCondition::Fetch;
	m->pty_process_ok = true;
	g->fetch(&m->pty_process);
	while (1) {
	if (m->pty_process.wait(1)) break;
	QApplication::processEvents();
	}
	return m->pty_process_ok;
	}

	void MainWindow::clearLog()
	{
	m->logs.clear();
	m->label_map.clear();
	m->uncommited_changes = false;
	ui->tableWidget_log->clearContents();
	ui->tableWidget_log->scrollToTop();
	}

	void MainWindow::openRepository_(GitPtr g)
	{
	m->objcache.setup(g);

	if (isValidWorkingCopy(g)) {

	if (isRemoteOnline() && appsettings()->automatically_fetch_when_opening_the_repository) {
	if (!fetch(g)) {
	return;
	}
	}

	clearLog();
	clearRepositoryInfo();

	detectGitServerType(g);

	updateFilesList(QString(), true);

	bool canceled = false;
	ui->tableWidget_log->setEnabled(false);

	// ログを取得
	m->logs = retrieveCommitLog(g);
	// ブランチを取得
	queryBranches(g);
	// タグを取得
	m->tag_map.clear();
	QList<Git::Tag> tags = g->tags();
	for (Git::Tag const &tag : tags) {
	Git::Tag t = tag;
	t.id = m->objcache.getCommitIdFromTag(t.id);
	m->tag_map[t.id].push_back(t);
	}

	ui->tableWidget_log->setEnabled(true);
	updateCommitTableLater();
	if (canceled) return;

	QString branch_name = currentBranch().name;
	if (currentBranch().flags & Git::Branch::HeadDetached) {
	branch_name = QString("(HEAD detached at %1)").arg(branch_name);
	}

	QString repo_name = currentRepositoryName();
	setRepositoryInfo(repo_name, branch_name);
	} else {
	clearLog();
	clearRepositoryInfo();
	}

	updateRemoteInfo();

	updateWindowTitle(g);

	m->head_id = m->objcache.revParse("HEAD");

	if (isThereUncommitedChanges()) {
	Git::CommitItem item;
	item.parent_ids.push_back(m->current_branch.id);
	item.message = tr("Uncommited changes");
	m->logs.insert(m->logs.begin(), item);
	}

	prepareLogTableWidget();

	int count = m->logs.size();

	ui->tableWidget_log->setRowCount(count);

	int selrow = -1;

	for (int row = 0; row < count; row++) {
	Git::CommitItem const *commit = &m->logs[row];
	{
	QTableWidgetItem *item = new QTableWidgetItem();
	item->setData(IndexRole, row);
	ui->tableWidget_log->setItem(row, 0, item);
	}
	int col = 1; // カラム0はコミットグラフなので、その次から
	auto AddColumn = [&](QString const &text, bool bold, QString const &tooltip){
	QTableWidgetItem *item = new QTableWidgetItem(text);
	if (!tooltip.isEmpty()) {
	QString tt = tooltip;
	tt.replace('\n', ' ');
	tt = tt.toHtmlEscaped();
	tt = "<p style='white-space: pre'>" + tt + "</p>";
	item->setToolTip(tt);
	}
	if (bold) {
	QFont font = item->font();
	font.setBold(true);
	item->setFont(font);
	}
	ui->tableWidget_log->setItem(row, col, item);
	col++;
	};
	QString commit_id;
	QString datetime;
	QString author;
	QString message;
	QString message_ex;
	bool isHEAD = commit->commit_id == m->head_id;
	bool bold = false;
	{
	if (Git::isUncommited(*commit)) { // 未コミットの時
	bold = true; // 太字
	selrow = row;
	} else {
	if (isHEAD && !isThereUncommitedChanges()) { // HEADで、未コミットがないとき
	bold = true; // 太字
	selrow = row;
	}
	commit_id = abbrevCommitID(*commit);
	}
	datetime = misc::makeDateTimeString(commit->commit_date);
	author = commit->author;
	message = commit->message;
	message_ex = makeCommitInfoText(row, &m->label_map[row]);
	}
	AddColumn(commit_id, false, QString());
	AddColumn(datetime, false, QString());
	AddColumn(author, false, QString());
	AddColumn(message, bold, message + message_ex);
	ui->tableWidget_log->setRowHeight(row, 24);
	}
	ui->tableWidget_log->resizeColumnsToContents();
	ui->tableWidget_log->horizontalHeader()->setStretchLastSection(false);
	ui->tableWidget_log->horizontalHeader()->setStretchLastSection(true);

	ui->tableWidget_log->setFocus();
	setCurrentLogRow(0);

	QTableWidgetItem *p = ui->tableWidget_log->item(selrow < 0 ? 0 : selrow, 2);
	ui->tableWidget_log->setCurrentItem(p);

	udpateButton();
	}

	void MainWindow::removeRepositoryFromBookmark(int index, bool ask)
	{
	if (ask) {
	int r = QMessageBox::warning(this, tr("Confirm Remove"), tr("Are you sure you want to remove the repository from bookmarks ?") + '\n' + tr("(Files will NOT be deleted)"), QMessageBox::Ok, QMessageBox::Cancel);
	if (r != QMessageBox::Ok) return;
	}
	if (index >= 0 && index < m->repos.size()) {
	m->repos.erase(m->repos.begin() + index);
	saveRepositoryBookmarks();
	updateRepositoriesList();
	}
	}

	void MainWindow::removeSelectedRepositoryFromBookmark(bool ask)
	{
	int i = indexOfRepository(ui->treeWidget_repos->currentItem());
	removeRepositoryFromBookmark(i, ask);
	}

	void MainWindow::openRepository(bool validate, bool waitcursor)
	{
	if (validate) {
	QString dir = currentWorkingCopyDir();
	if (!QFileInfo(dir).isDir()) {
	int r = QMessageBox::warning(this, tr("Open Repository"), dir + "\n\n" + tr("No such folder") + "\n\n" + tr("Remove from bookmark ?"), QMessageBox::Ok, QMessageBox::Cancel);
	if (r == QMessageBox::Ok) {
	removeSelectedRepositoryFromBookmark(false);
	}
	return;
	}
	if (!Git::isValidWorkingCopy(dir)) {
	QMessageBox::warning(this, tr("Open Repository"), tr("Not a valid git repository") + "\n\n" + dir);
	return;
	}
	}

	if (waitcursor) {
	OverrideWaitCursor;
	openRepository(false, false);
	return;
	}

	GitPtr g = git(); // ポインタの有効性チェックはしない（nullptrでも続行）
	openRepository_(g);
	}

	void MainWindow::reopenRepository(bool log, std::function<void(GitPtr g)> callback)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	OverrideWaitCursor;
	if (log) {
	setLogEnabled(g, true);
	AsyncExecGitThread_ th(g, callback);
	th.start();
	while (1) {
	if (th.wait(1)) break;
	QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
	}
	setLogEnabled(g, false);
	} else {
	callback(g);
	}
	openRepository_(g);
	}

	void MainWindow::udpateButton()
	{
	Git::Branch b = currentBranch();

	int n;

	n = b.ahead > 0 ? b.ahead : -1;
	ui->toolButton_push->setNumber(n);

	n = b.behind > 0 ? b.behind : -1;
	ui->toolButton_pull->setNumber(n);
	}

	void MainWindow::autoOpenRepository(QString dir)
	{
	auto Open = [&](RepositoryItem const &item){
	m->current_repo = item;
	openRepository(false);
	};

	RepositoryItem const *repo = findRegisteredRepository(&dir);
	if (repo) {
	Open(*repo);
	return;
	}

	RepositoryItem newitem;
	GitPtr g = git(dir);
	if (isValidWorkingCopy(g)) {
	ushort const *left = dir.utf16();
	ushort const *right = left + dir.size();
	if (right[-1] == '/' \|\| right[-1] == '\\') {
	right--;
	}
	ushort const *p = right;
	while (left + 1 < p && !(p[-1] == '/' \|\| p[-1] == '\\')) p--;
	if (p < right) {
	newitem.local_dir = dir;
	newitem.name = QString::fromUtf16(p, right - p);
	saveRepositoryBookmark(newitem);
	Open(newitem);
	return;
	}
	}
	}

	void MainWindow::openSelectedRepository()
	{
	QTreeWidgetItem *treeitem = ui->treeWidget_repos->currentItem();
	RepositoryItem const *item = repositoryItem(treeitem);
	if (item) {
	m->current_repo = *item;
	openRepository(true, true);
	}
	}

	QString MainWindow::getBookmarksFilePath() const
	{
	return global->app_config_dir / "bookmarks.xml";
	}



	void MainWindow::commit(bool amend)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	while (1) {
	Git::User user = g->getUser(Git::Source::Default);
	QString sign_id = g->signingKey(Git::Source::Default);
	gpg::Data key;
	{
	QList<gpg::Data> keys;
	gpg::listKeys(global->gpg_command, &keys);
	for (gpg::Data const &k : keys) {
	if (k.id == sign_id) {
	key = k;
	}
	}
	}
	CommitDialog dlg(this, currentRepositoryName(), user, key);
	if (amend) {
	dlg.setText(m->logs[0].message);
	}
	if (dlg.exec() == QDialog::Accepted) {
	QString text = dlg.text();
	if (text.isEmpty()) {
	QMessageBox::warning(this, tr("Commit"), tr("Commit message can not be omitted."));
	continue;
	}
	bool sign = dlg.isSigningEnabled();
	bool ok;
	if (amend) {
	ok = g->commit_amend_m(text, sign, &m->pty_process);
	} else {
	ok = g->commit(text, sign, &m->pty_process);
	}
	if (ok) {
	openRepository(true);
	} else {
	QString err = g->errorMessage().trimmed();
	err += "\n*** ";
	err += tr("Failed to commit");
	err += " ***\n";
	writeLog(err);
	}
	break;
	} else {
	break;
	}
	}
	}

	void MainWindow::commit_amend()
	{
	commit(true);
	}


	void MainWindow::updateStatusBarText()
	{
	QString text;

	QWidget *w = QWidget::focusWidget();
	if (w == ui->treeWidget_repos) {
	QTreeWidgetItem *ite = ui->treeWidget_repos->currentItem();
	RepositoryItem const *item = repositoryItem(ite);
	if (item) {
	text = QString("%1 : %2")
	.arg(item->name)
	.arg(misc::normalizePathSeparator(item->local_dir))
	;
	}
	} else if (w == ui->tableWidget_log) {
	QTableWidgetItem *item = ui->tableWidget_log->item(selectedLogIndex(), 0);
	if (item) {
	int row = item->data(IndexRole).toInt();
	if (row < (int)m->logs.size()) {
	Git::CommitItem const &commit = m->logs[row];
	if (Git::isUncommited(commit)) {
	text = tr("Uncommited changes");
	} else {
	QString id = commit.commit_id;
	text = QString("%1 : %2%3")
	.arg(id.mid(0, 7))
	.arg(commit.message)
	.arg(makeCommitInfoText(row, nullptr))
	;
	}
	}
	}
	}

	setStatusBarText(text);
	}

	void MainWindow::execRepositoryPropertyDialog(QString workdir, bool open_repository_menu)
	{
	if (workdir.isEmpty()) {
	workdir = currentWorkingCopyDir();
	}
	QString name;
	RepositoryItem const *repo = findRegisteredRepository(&workdir);
	if (repo) {
	name = repo->name;
	}
	if (name.isEmpty()) {
	name = makeRepositoryName(workdir);
	}
	GitPtr g = git(workdir);
	RepositoryPropertyDialog dlg(this, g, *repo, open_repository_menu);
	dlg.exec();
	if (dlg.isRemoteChanged()) {
	updateRemoteInfo();
	}
	}



	void MainWindow::on_action_commit_triggered()
	{
	commit();
	}

	void MainWindow::on_action_fetch_triggered()
	{
	if (!isRemoteOnline()) return;

	reopenRepository(true, [&](GitPtr g){
	fetch(g);
	});
	}

	void MainWindow::on_action_push_triggered()
	{
	if (!isRemoteOnline()) return;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	if (g->getRemotes().isEmpty()) {
	QMessageBox::warning(this, qApp->applicationName(), tr("No remote repository is registered."));
	execRepositoryPropertyDialog(QString(), true);
	return;
	}

	int exitcode = 0;
	QString errormsg;

	reopenRepository(true, [&](GitPtr g){
	g->push(false, &m->pty_process);
	while (1) {
	if (m->pty_process.wait(1)) break;
	QApplication::processEvents();
	}
	exitcode = m->pty_process.getExitCode();
	errormsg = m->pty_process.getMessage();
	});

	if (exitcode == 128) {
	if (errormsg.indexOf("no upstream branch") >= 0) {
	QString brname = currentBranch().name;

	QString msg = tr("The current branch %1 has no upstream branch.");
	msg = msg.arg(brname);
	msg += '\n';
	msg += tr("You try push --set-upstream");
	QMessageBox::warning(this, qApp->applicationName(), msg);
	pushSetUpstream(false);
	return;
	}
	if (errormsg.indexOf("Connection refused") >= 0) {
	QMessageBox::critical(this, qApp->applicationName(), tr("Connection refused."));
	return;
	}
	}
	}

	void MainWindow::on_action_pull_triggered()
	{
	if (!isRemoteOnline()) return;

	reopenRepository(true, [&](GitPtr g){
	m->pty_condition = PtyCondition::Pull;
	m->pty_process_ok = true;
	g->pull(&m->pty_process);
	while (1) {
	if (m->pty_process.wait(1)) break;
	QApplication::processEvents();
	}
	});
	}

	void MainWindow::on_toolButton_push_clicked()
	{
	ui->action_push->trigger();
	}

	void MainWindow::on_toolButton_pull_clicked()
	{
	ui->action_pull->trigger();
	}

	void MainWindow::on_treeWidget_repos_currentItemChanged(QTreeWidgetItem * /current/, QTreeWidgetItem * /previous/)
	{
	updateStatusBarText();
	}

	void MainWindow::on_treeWidget_repos_itemDoubleClicked(QTreeWidgetItem * /item/, int /column/)
	{
	openSelectedRepository();
	}

	void MainWindow::execCommitPropertyDialog(QWidget parent, Git::CommitItem const commit)
	{
	CommitPropertyDialog dlg(parent, this, commit);
	dlg.exec();
	}

	QAction MainWindow::addMenuActionProperty(QMenu menu)
	{
	return menu->addAction(tr("&Property"));
	}

	int MainWindow::indexOfRepository(QTreeWidgetItem const *treeitem) const
	{
	if (!treeitem) return -1;
	return treeitem->data(0, IndexRole).toInt();
	}

	void MainWindow::on_treeWidget_repos_customContextMenuRequested(const QPoint &pos)
	{
	QTreeWidgetItem *treeitem = ui->treeWidget_repos->currentItem();
	if (!treeitem) return;

	RepositoryItem const *repo = repositoryItem(treeitem);

	int index = indexOfRepository(treeitem);
	if (isGroupItem(treeitem)) { // group item
	QMenu menu;
	QAction *a_add_new_group = menu.addAction(tr("&Add new group"));
	QAction *a_delete_group = menu.addAction(tr("&Delete group"));
	QAction *a_rename_group = menu.addAction(tr("&Rename group"));
	QPoint pt = ui->treeWidget_repos->mapToGlobal(pos);
	QAction *a = menu.exec(pt + QPoint(8, -8));
	if (a) {
	if (a == a_add_new_group) {
	QTreeWidgetItem *child = newQTreeWidgetFolderItem(tr("New group"));
	treeitem->addChild(child);
	child->setFlags(child->flags() \| Qt::ItemIsEditable);
	ui->treeWidget_repos->setCurrentItem(child);
	return;
	}
	if (a == a_delete_group) {
	QTreeWidgetItem *parent = treeitem->parent();
	if (parent) {
	int i = parent->indexOfChild(treeitem);
	delete parent->takeChild(i);
	} else {
	int i = ui->treeWidget_repos->indexOfTopLevelItem(treeitem);
	delete ui->treeWidget_repos->takeTopLevelItem(i);
	}
	refrectRepositories();
	return;
	}
	if (a == a_rename_group) {
	ui->treeWidget_repos->editItem(treeitem);
	return;
	}
	}
	} else if (repo) { // repository item
	QString open_terminal = tr("Open &terminal");
	QString open_commandprompt = tr("Open command promp&t");
	QMenu menu;
	QAction *a_open = menu.addAction(tr("&Open"));
	menu.addSeparator();
	#ifdef Q_OS_WIN
	QAction *a_open_terminal = menu.addAction(open_commandprompt);
	(void)open_terminal;
	#else
	QAction *a_open_terminal = menu.addAction(open_terminal);
	(void)open_commandprompt;
	#endif
	QAction *a_open_folder = menu.addAction(tr("Open &folder"));
	menu.addSeparator();
	QAction *a_remove = menu.addAction(tr("&Remove"));

	menu.addSeparator();
	QAction *a_properties = addMenuActionProperty(&menu);

	QPoint pt = ui->treeWidget_repos->mapToGlobal(pos);
	QAction *a = menu.exec(pt + QPoint(8, -8));
	if (a) {
	if (a == a_open) {
	openSelectedRepository();
	return;
	}
	if (a == a_open_folder) {
	openExplorer(repo);
	return;
	}
	if (a == a_open_terminal) {
	openTerminal(repo);
	return;
	}
	if (a == a_remove) {
	removeRepositoryFromBookmark(index, true);
	return;
	}
	if (a == a_properties) {
	execRepositoryPropertyDialog(repo->local_dir);
	return;
	}
	}
	}
	}

	void MainWindow::execCommitExploreWindow(QWidget parent, Git::CommitItem const commit)
	{
	CommitExploreWindow win(parent, this, &m->objcache, commit);
	win.exec();
	}

	void MainWindow::on_tableWidget_log_customContextMenuRequested(const QPoint &pos)
	{
	Git::CommitItem const *commit = selectedCommitItem();
	if (commit) {
	int row = selectedLogIndex();

	QMenu menu;

	QAction *a_push_upstream = nullptr;
	if (pushSetUpstream(true)) {
	a_push_upstream = menu.addAction("push --set-upstream ...");
	}

	QAction *a_edit_comment = nullptr;
	if (row == 0 && currentBranch().ahead > 0) {
	a_edit_comment = menu.addAction(tr("Edit comment..."));
	}

	bool is_valid_commit_id = Git::isValidID(commit->commit_id);

	QAction *a_checkout = is_valid_commit_id ? menu.addAction(tr("Checkout/Branch...")) : nullptr;
	QAction *a_delbranch = is_valid_commit_id ? menu.addAction(tr("Delete branch...")) : nullptr;
	QAction *a_merge = is_valid_commit_id ? menu.addAction(tr("Merge")) : nullptr;
	QAction *a_cherrypick = is_valid_commit_id ? menu.addAction(tr("Cherry-pick")) : nullptr;

	QAction *a_edit_tags = is_valid_commit_id ? menu.addAction(tr("Edit tags...")) : nullptr;
	QAction *a_revert = is_valid_commit_id ? menu.addAction(tr("Revert")) : nullptr;
	QAction *a_explore = is_valid_commit_id ? menu.addAction(tr("Explore")) : nullptr;

	QAction *a_reset_head = nullptr;
	#if 0 // 下手に使うと危険なので、とりあえず無効にしておく
	if (is_valid_commit_id && commit->commit_id == m->head_id) {
	a_reset_head = menu.addAction(tr("Reset HEAD"));
	}
	#endif
	QAction *a_properties = addMenuActionProperty(&menu);

	QAction *a = menu.exec(ui->tableWidget_log->viewport()->mapToGlobal(pos) + QPoint(8, -8));
	if (a) {
	if (a == a_properties) {
	execCommitPropertyDialog(this, commit);
	return;
	}
	if (a == a_push_upstream) {
	pushSetUpstream(false);
	return;
	}
	if (a == a_edit_comment) {
	commit_amend();
	return;
	}
	if (a == a_checkout) {
	checkout(this, commit);
	return;
	}
	if (a == a_delbranch) {
	deleteBranch(commit);
	return;
	}
	if (a == a_merge) {
	mergeBranch(commit);
	return;
	}
	if (a == a_cherrypick) {
	cherrypick(commit);
	return;
	}
	if (a == a_edit_tags) {
	ui->action_edit_tags->trigger();
	return;
	}
	if (a == a_revert) {
	revertCommit();
	return;
	}
	if (a == a_explore) {
	execCommitExploreWindow(this, commit);
	return;
	}
	if (a == a_reset_head) {
	reopenRepository(false, [](GitPtr g){
	g->reset_head1();
	});
	return;
	}
	}
	}
	}

	void MainWindow::on_listWidget_files_customContextMenuRequested(const QPoint &pos)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	QMenu menu;
	QAction *a_delete = menu.addAction(tr("Delete"));
	QAction *a_untrack = menu.addAction(tr("Untrack"));
	QAction *a_history = menu.addAction(tr("History"));
	QAction *a_blame = menu.addAction(tr("Blame"));
	QAction *a_properties = addMenuActionProperty(&menu);

	QPoint pt = ui->listWidget_files->mapToGlobal(pos) + QPoint(8, -8);
	QAction *a = menu.exec(pt);
	if (a) {
	QListWidgetItem *item = ui->listWidget_files->currentItem();
	if (a == a_delete) {
	if (askAreYouSureYouWantToRun("Delete", tr("Delete selected files."))) {
	for_each_selected_files([&](QString const &path){
	g->removeFile(path);
	g->chdirexec([&](){
	QFile(path).remove();
	return true;
	});
	});
	openRepository(false);
	}
	} else if (a == a_untrack) {
	if (askAreYouSureYouWantToRun("Untrack", tr("rm --cached files"))) {
	for_each_selected_files([&](QString const &path){
	g->rm_cached(path);
	});
	openRepository(false);
	}
	} else if (a == a_history) {
	execFileHistory(item);
	} else if (a == a_blame) {
	blame(item);
	} else if (a == a_properties) {
	execFilePropertyDialog(item);
	}
	}
	}

	void MainWindow::on_listWidget_unstaged_customContextMenuRequested(const QPoint &pos)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	QList<QListWidgetItem *> items = ui->listWidget_unstaged->selectedItems();
	if (!items.isEmpty()) {
	QMenu menu;
	QAction *a_stage = menu.addAction(tr("Stage"));
	QAction *a_reset_file = menu.addAction(tr("Reset"));
	QAction *a_ignore = menu.addAction(tr("Ignore"));
	QAction *a_delete = menu.addAction(tr("Delete"));
	QAction *a_untrack = menu.addAction(tr("Untrack"));
	QAction *a_history = menu.addAction(tr("History"));
	QAction *a_blame = menu.addAction(tr("Blame"));
	QAction *a_properties = addMenuActionProperty(&menu);
	QPoint pt = ui->listWidget_unstaged->mapToGlobal(pos) + QPoint(8, -8);
	QAction *a = menu.exec(pt);
	if (a) {
	QListWidgetItem *item = ui->listWidget_unstaged->currentItem();
	if (a == a_stage) {
	for_each_selected_files([&](QString const &path){
	g->stage(path);
	});
	updateCurrentFilesList();
	return;
	}
	if (a == a_reset_file) {
	QStringList paths;
	for_each_selected_files([&](QString const &path){
	paths.push_back(path);
	});
	resetFile(paths);
	return;
	}
	if (a == a_ignore) {
	QString gitignore_path = currentWorkingCopyDir() / ".gitignore";
	if (items.size() == 1) {
	QString file = getFilePath(items[0]);
	EditGitIgnoreDialog dlg(this, gitignore_path, file);
	if (dlg.exec() == QDialog::Accepted) {
	QString appending = dlg.text();
	if (!appending.isEmpty()) {
	QString text;

	QString path = gitignore_path;
	path.replace('/', QDir::separator());

	{
	QFile file(path);
	if (file.open(QFile::ReadOnly)) {
	text += QString::fromUtf8(file.readAll());
	}
	}

	size_t n = text.size();
	if (n > 0 && text[(int)n - 1] != '\n') {
	text += '\n'; // 最後に改行を追加
	}

	text += appending + '\n';

	{
	QFile file(path);
	if (file.open(QFile::WriteOnly)) {
	file.write(text.toUtf8());
	}
	}
	updateCurrentFilesList();
	return;
	}
	} else {
	return;
	}
	}

	QString append;
	for_each_selected_files([&](QString const &path){
	if (path == ".gitignore") {
	// skip
	} else {
	append += path + '\n';
	}
	});
	if (TextEditDialog::editFile(this, gitignore_path, ".gitignore", append)) {
	updateCurrentFilesList();
	}
	return;
	}
	if (a == a_delete) {
	if (askAreYouSureYouWantToRun("Delete", "Delete selected files.")) {
	for_each_selected_files([&](QString const &path){
	g->removeFile(path);
	g->chdirexec([&](){
	QFile(path).remove();
	return true;
	});
	});
	openRepository(false);
	}
	return;
	}
	if (a == a_untrack) {
	if (askAreYouSureYouWantToRun("Untrack", "rm --cached")) {
	for_each_selected_files([&](QString const &path){
	g->rm_cached(path);
	});
	openRepository(false);
	}
	return;
	}
	if (a == a_history) {
	execFileHistory(item);
	return;
	}
	if (a == a_blame) {
	blame(item);
	return;
	}
	if (a == a_properties) {
	execFilePropertyDialog(item);
	return;
	}
	}
	}
	}

	void MainWindow::on_listWidget_staged_customContextMenuRequested(const QPoint &pos)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	QListWidgetItem *item = ui->listWidget_staged->currentItem();
	if (item) {
	QString path = getFilePath(item);
	QString fullpath = currentWorkingCopyDir() / path;
	if (QFileInfo(fullpath).isFile()) {
	QMenu menu;
	QAction *a_unstage = menu.addAction(tr("Unstage"));
	QAction *a_history = menu.addAction(tr("History"));
	QAction *a_blame = menu.addAction(tr("Blame"));
	QAction *a_properties = addMenuActionProperty(&menu);
	QPoint pt = ui->listWidget_staged->mapToGlobal(pos) + QPoint(8, -8);
	QAction *a = menu.exec(pt);
	if (a) {
	QListWidgetItem *item = ui->listWidget_unstaged->currentItem();
	if (a == a_unstage) {
	g->unstage(path);
	openRepository(false);
	} else if (a == a_history) {
	execFileHistory(item);
	} else if (a == a_blame) {
	blame(item);
	} else if (a == a_properties) {
	execFilePropertyDialog(item);
	}
	}
	}
	}
	}

	bool MainWindow::askAreYouSureYouWantToRun(QString const &title, QString const &command)
	{
	QString message = tr("Are you sure you want to run the following command ?");
	QString text = "%1\n\n%2";
	text = text.arg(message).arg(command);
	return QMessageBox::warning(this, title, text, QMessageBox::Ok, QMessageBox::Cancel) == QMessageBox::Ok;
	}

	void MainWindow::resetFile(QStringList const &paths)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	if (paths.isEmpty()) {
	// nop
	} else {
	QString cmd = "git checkout -- \"%1\"";
	cmd = cmd.arg(paths[0]);
	if (askAreYouSureYouWantToRun(tr("Reset a file"), "> " + cmd)) {
	for (QString const &path : paths) {
	g->resetFile(path);
	}
	openRepository(true);
	}
	}
	}

	void MainWindow::revertAllFiles()
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	QString cmd = "git reset --hard HEAD";
	if (askAreYouSureYouWantToRun(tr("Revert all files"), "> " + cmd)) {
	g->resetAllFiles();
	openRepository(true);
	}
	}

	QStringList MainWindow::selectedFiles_(QListWidget *listwidget) const
	{
	QStringList list;
	QList<QListWidgetItem *> items = listwidget->selectedItems();
	for (QListWidgetItem *item : items) {
	QString path = getFilePath(item);
	list.push_back(path);
	}
	return list;

	}

	QStringList MainWindow::selectedFiles() const
	{
	QWidget *w = QWidget::focusWidget();
	if (w == ui->listWidget_files) return selectedFiles_(ui->listWidget_files);
	if (w == ui->listWidget_staged) return selectedFiles_(ui->listWidget_staged);
	if (w == ui->listWidget_unstaged) return selectedFiles_(ui->listWidget_unstaged);
	return QStringList();
	}

	void MainWindow::for_each_selected_files(std::function<void(QString const&)> fn)
	{
	for (QString path : selectedFiles()) {
	fn(path);
	}
	}

	void MainWindow::execFileHistory(QString const &path)
	{
	if (path.isEmpty()) return;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	FileHistoryWindow dlg(this);
	dlg.prepare(g, path);
	dlg.exec();
	}

	void MainWindow::execFileHistory(QListWidgetItem *item)
	{
	if (item) {
	QString path = getFilePath(item);
	if (!path.isEmpty()) {
	execFileHistory(path);
	}
	}
	}

	void MainWindow::addWorkingCopyDir(QString dir, QString name, bool open)
	{
	if (dir.endsWith(".git")) {
	int i = dir.size();
	if (i > 4) {
	ushort c = dir.utf16()[i - 5];
	if (c == '/' \|\| c == '\\') {
	dir = dir.mid(0, i - 5);
	}
	}
	}

	if (!Git::isValidWorkingCopy(dir)) {
	qDebug() << "Invalid working dir: " + dir;
	return;
	}

	if (name.isEmpty()) {
	name = makeRepositoryName(dir);
	}

	RepositoryItem item;
	item.local_dir = dir;
	item.name = name;
	saveRepositoryBookmark(item);

	if (open) {
	m->current_repo = item;
	GitPtr g = git(item.local_dir);
	openRepository_(g);
	}
	}

	void MainWindow::on_action_open_existing_working_copy_triggered()
	{
	QString dir = defaultWorkingDir();
	dir = QFileDialog::getExistingDirectory(this, tr("Add existing working copy"), dir);
	addWorkingCopyDir(dir, false);
	}

	void MainWindow::on_action_view_refresh_triggered()
	{
	openRepository(true);
	}

	void MainWindow::on_tableWidget_log_currentItemChanged(QTableWidgetItem * /current/, QTableWidgetItem * /previous/)
	{
	clearFileList();

	QTableWidgetItem *item = ui->tableWidget_log->item(selectedLogIndex(), 0);
	if (!item) return;

	int row = item->data(IndexRole).toInt();
	if (row < (int)m->logs.size()) {
	updateStatusBarText();
	m->update_files_list_counter = 200;
	}
	}

	void MainWindow::on_toolButton_stage_clicked()
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	g->stage(selectedFiles());
	updateCurrentFilesList();
	}

	void MainWindow::on_toolButton_unstage_clicked()
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	g->unstage(selectedFiles());
	updateCurrentFilesList();
	}

	void MainWindow::on_toolButton_select_all_clicked()
	{
	if (ui->listWidget_unstaged->count() > 0) {
	ui->listWidget_unstaged->setFocus();
	ui->listWidget_unstaged->selectAll();
	} else if (ui->listWidget_staged->count() > 0) {
	ui->listWidget_staged->setFocus();
	ui->listWidget_staged->selectAll();
	}
	}

	void MainWindow::on_toolButton_commit_clicked()
	{
	ui->action_commit->trigger();
	}

	bool MainWindow::editFile(const QString &path, QString const &title)
	{
	return TextEditDialog::editFile(this, path, title);
	}

	struct Task {
	int index = 0;
	int parent = 0;
	Task()
	{
	}
	Task(int index, int parent)
	: index(index)
	, parent(parent)
	{
	}
	};

	struct Element {
	int depth = 0;
	std::vector<int> indexes;
	};

	void MainWindow::updateCommitGraph()
	{
	const size_t LogCount = m->logs.size();
	// 樹形図情報を構築する
	if (LogCount > 0) {
	auto LogItem = [&](size_t i)->Git::CommitItem &{ return m->logs[i]; };
	enum { // 有向グラフを構築するあいだ CommitItem::marker_depth をフラグとして使用する
	UNKNOWN = 0,
	KNOWN = 1,
	};
	for (Git::CommitItem &item : m->logs) {
	item.marker_depth = UNKNOWN;
	}
	// コミットハッシュを検索して、親コミットのインデックスを求める
	for (size_t i = 0; i < LogCount; i++) {
	Git::CommitItem *item = &LogItem(i);
	item->parent_lines.clear();
	if (item->parent_ids.empty()) {
	item->resolved = true;
	} else {
	for (int j = 0; j < item->parent_ids.size(); j++) { // 親の数だけループ
	QString const &parent_id = item->parent_ids[j]; // 親のハッシュ値
	for (size_t k = i + 1; k < LogCount; k++) { // 親を探す
	if (LogItem(k).commit_id == parent_id) { // ハッシュ値が一致したらそれが親
	item->parent_lines.push_back(k); // インデックス値を記憶
	LogItem(k).has_child = true;
	LogItem(k).marker_depth = KNOWN;
	item->resolved = true;
	break;
	}
	}
	}
	}
	}
	std::vector<Element> elements; // 線分リスト
	{ // 線分リストを作成する
	std::deque<Task> tasks; // 未処理タスクリスト
	{
	for (size_t i = 0; i < LogCount; i++) {
	Git::CommitItem *item = &LogItem(i);
	if (item->marker_depth == UNKNOWN) {
	int n = item->parent_lines.size(); // 最初のコミットアイテム
	for (int j = 0; j < n; j++) {
	tasks.push_back(Task(i, j)); // タスクを追加
	}
	}
	item->marker_depth = UNKNOWN;
	}
	}
	while (!tasks.empty()) { // タスクが残っているならループ
	Element e;
	Task task;
	{ // 最初のタスクを取り出す
	task = tasks.front();
	tasks.pop_front();
	}
	e.indexes.push_back(task.index); // 先頭のインデックスを追加
	int index = LogItem(task.index).parent_lines[task.parent].index; // 開始インデックス
	while (index > 0 && (size_t)index < LogCount) { // 最後に到達するまでループ
	e.indexes.push_back(index); // インデックスを追加
	int n = LogItem(index).parent_lines.size(); // 親の数
	if (n == 0) break; // 親がないなら終了
	Git::CommitItem *item = &LogItem(index);
	if (item->marker_depth == KNOWN) break; // 既知のアイテムに到達したら終了
	item->marker_depth = KNOWN; // 既知のアイテムにする
	for (int i = 1; i < n; i++) {
	tasks.push_back(Task(index, i)); // タスク追加
	}
	index = LogItem(index).parent_lines[0].index; // 次の親（親リストの先頭の要素）
	}
	if (e.indexes.size() >= 2) {
	elements.push_back(e);
	}
	}
	}
	// 線情報をクリア
	for (Git::CommitItem &item : m->logs) {
	item.marker_depth = -1;
	item.parent_lines.clear();
	}
	// マークと線の深さを決める
	if (!elements.empty()) {
	{ // 優先順位を調整する
	std::sort(elements.begin(), elements.end(), [](Element const &left, Element const &right){
	int i = 0;
	{ // 長いものを優先して左へ
	int l = left.indexes.back() - left.indexes.front();
	int r = right.indexes.back() - right.indexes.front();
	i = r - l; // 降順
	}
	if (i == 0) {
	// コミットが新しいものを優先して左へ
	int l = left.indexes.front();
	int r = right.indexes.front();
	i = l - r; // 昇順
	}
	return i < 0;
	});
	// 子の無いブランチ（タグ等）が複数連続しているとき、古いコミットを右に寄せる
	{
	for (size_t i = 0; i + 1 < elements.size(); i++) {
	Element *e = &elements[i];
	int index1 = e->indexes.front();
	if (index1 > 0 && !LogItem(index1).has_child) { // 子がない
	// 新しいコミットを探す
	for (size_t j = i + 1; j < elements.size(); j++) { // 現在位置より後ろを探す
	Element *f = &elements[j];
	int index2 = f->indexes.front();
	if (index1 == index2 + 1) { // 一つだけ新しいコミット
	Element t = std::move(*f);
	elements.erase(elements.begin() + j); // 移動元を削除
	elements.insert(elements.begin() + i, std::move(t)); // 現在位置に挿入
	}
	}
	// 古いコミットを探す
	size_t j = 0;
	while (j < i) { // 現在位置より前を探す
	Element *f = &elements[j];
	int index2 = f->indexes.front();
	if (index1 + 1 == index2) { // 一つだけ古いコミット
	Element t = std::move(*f);
	elements.erase(elements.begin() + j); // 移動元を削除
	elements.insert(elements.begin() + i, std::move(t)); // 現在位置の次に挿入
	index1 = index2;
	f = e;
	} else {
	j++;
	}
	}
	}
	}
	}
	}
	{ // 最初の線は深さを0にする
	Element *e = &elements.front();
	for (size_t i = 0; i < e->indexes.size(); i++) {
	int index = e->indexes[i];
	LogItem(index).marker_depth = 0; // マークの深さを設定
	e->depth = 0; // 線の深さを設定
	}
	}
	// 最初以外の線分の深さを決める
	for (size_t i = 1; i < elements.size(); i++) { // 最初以外をループ
	Element *e = &elements[i];
	int depth = 1;
	while (1) { // 失敗したら繰り返し
	for (size_t j = 0; j < i; j++) { // 既に処理済みの線を調べる
	Element const *f = &elements[j]; // 検査対象
	if (e->indexes.size() == 2) { // 二つしかない場合
	int from = e->indexes[0]; // 始点
	int to = e->indexes[1]; // 終点
	if (LogItem(from).has_child) {
	for (size_t k = 0; k + 1 < f->indexes.size(); k++) { // 検査対象の全ての線分を調べる
	int curr = f->indexes[k];
	int next = f->indexes[k + 1];
	if (from > curr && to == next) { // 決定済みの線に直結できるか判定
	e->indexes.back() = from + 1; // 現在の一行下に直結する
	e->depth = elements[j].depth; // 接続先の深さ
	goto DONE; // 決定
	}
	}
	}
	}
	if (depth == f->depth) { // 同じ深さ
	if (e->indexes.back() > f->indexes.front() && e->indexes.front() < f->indexes.back()) { // 重なっている
	goto FAIL; // この深さには線を置けないのでやりなおし
	}
	}
	}
	for (size_t j = 0; j < e->indexes.size(); j++) {
	int index = e->indexes[j];
	Git::CommitItem *item = &LogItem(index);
	if (j == 0 && item->has_child) { // 最初のポイントで子がある場合
	// nop
	} else if ((j > 0 && j + 1 < e->indexes.size()) \|\| item->marker_depth < 0) { // 最初と最後以外、または、未確定の場合
	item->marker_depth = depth; // マークの深さを設定
	}
	}
	e->depth = depth; // 深さを決定
	goto DONE; // 決定
	FAIL:;
	depth++; // 一段深くして再挑戦
	}
	DONE:;
	}
	// 線情報を生成する
	for (size_t i = 0; i < elements.size(); i++) {
	Element const &e = elements[i];
	auto ColorNumber = [&](){ return e.depth; };
	size_t count = e.indexes.size();
	for (size_t j = 0; j + 1 < count; j++) {
	int curr = e.indexes[j];
	int next = e.indexes[j + 1];
	TreeLine line(next, e.depth);
	line.color_number = ColorNumber();
	line.bend_early = (j + 2 < count \|\| !LogItem(next).resolved);
	if (j + 2 == count) {
	if (count > 2 \|\| !LogItem(curr).has_child) { // 直結ではない、または、子がない
	line.depth = LogItem(next).marker_depth; // 合流する先のアイテムの深さと同じにする
	}
	}
	LogItem(curr).parent_lines.push_back(line); // 線を追加
	}
	}
	} else {
	if (LogCount == 1) { // コミットが一つだけ
	LogItem(0).marker_depth = 0;
	}
	}
	}
	}

	QList<Git::Tag> MainWindow::findTag(QString const &id)
	{
	auto it = m->tag_map.find(id);
	if (it != m->tag_map.end()) {
	return it->second;
	}
	return QList<Git::Tag>();
	}

	void MainWindow::on_action_edit_global_gitconfig_triggered()
	{
	QString dir = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
	QString path = dir / ".gitconfig";
	editFile(path, ".gitconfig");
	}

	void MainWindow::on_action_edit_git_config_triggered()
	{
	QString dir = currentWorkingCopyDir();
	QString path = dir / ".git/config";
	editFile(path, ".git/config");
	}

	void MainWindow::on_action_edit_gitignore_triggered()
	{
	QString dir = currentWorkingCopyDir();
	QString path = dir / ".gitignore";
	if (editFile(path, ".gitignore")) {
	updateCurrentFilesList();
	}
	}

	int MainWindow::selectedLogIndex() const
	{
	int i = ui->tableWidget_log->currentRow();
	if (i >= 0 && i < (int)m->logs.size()) {
	return i;
	}
	return -1;
	}

	Git::CommitItem const *MainWindow::selectedCommitItem() const
	{
	int i = selectedLogIndex();
	return commitItem(i);
	}

	Git::Object MainWindow::cat_file_(GitPtr g, QString const &id)
	{
	if (isValidWorkingCopy(g)) {
	QString path_prefix = PATH_PREFIX;
	if (id.startsWith(path_prefix)) {
	QString path = g->workingRepositoryDir();
	path = path / id.mid(path_prefix.size());
	QFile file(path);
	if (file.open(QFile::ReadOnly)) {
	Git::Object obj;
	obj.content = file.readAll();
	return obj;
	}
	} else if (Git::isValidID(id)) {
	return m->objcache.catFile(id);;
	}
	}
	return Git::Object();
	}

	Git::Object MainWindow::cat_file(QString const &id)
	{
	return cat_file_(git(), id);
	}

	void MainWindow::updateDiffView(QListWidgetItem *item)
	{
	clearDiffView();

	m->last_selected_file_item = item;

	if (!item) return;

	int idiff = indexOfDiff(item);
	if (idiff >= 0 && idiff < m->diff.result.size()) {
	Git::Diff const &diff = m->diff.result[idiff];
	QString key = GitDiff::makeKey(diff);
	auto it = m->diff_cache.find(key);
	if (it != m->diff_cache.end()) {
	int row = ui->tableWidget_log->currentRow();
	bool uncommited = (row >= 0 && row < (int)m->logs.size() && Git::isUncommited(m->logs[row]));
	ui->widget_diff_view->updateDiffView(it->second, uncommited);
	}
	}
	}

	void MainWindow::updateDiffView()
	{
	updateDiffView(m->last_selected_file_item);
	}

	void MainWindow::updateUnstagedFileCurrentItem()
	{
	updateDiffView(ui->listWidget_unstaged->currentItem());
	}

	void MainWindow::updateStagedFileCurrentItem()
	{
	updateDiffView(ui->listWidget_staged->currentItem());
	}

	void MainWindow::on_listWidget_unstaged_currentRowChanged(int /currentRow/)
	{
	updateUnstagedFileCurrentItem();
	}

	void MainWindow::on_listWidget_staged_currentRowChanged(int /currentRow/)
	{
	updateStagedFileCurrentItem();
	}

	void MainWindow::on_listWidget_files_currentRowChanged(int /currentRow/)
	{
	updateDiffView(ui->listWidget_files->currentItem());
	}

	void MainWindow::logGitVersion()
	{
	GitPtr g = git();
	QString s = g->version();
	if (!s.isEmpty()) {
	s += '\n';
	writeLog(s);
	}
	}

	bool MainWindow::checkExecutable(QString const &path)
	{
	if (QFileInfo(path).isExecutable()) {
	return true;
	}
	QString text = "The specified program '%1' is not executable.\n";
	text = text.arg(path);
	writeLog(text);
	return false;
	}

	void MainWindow::internalSetCommand(QString const &path, bool save, QString const &name, QString *out)
	{
	if (!path.isEmpty() && checkExecutable(path)) {
	if (save) {
	MySettings s;
	s.beginGroup("Global");
	s.setValue(name, path);
	s.endGroup();
	}
	*out = path;
	} else {
	*out = QString();
	}
	}

	void MainWindow::setGitCommand(QString const &path, bool save)
	{
	internalSetCommand(path, save, "GitCommand", &m->gcx.git_command);
	}

	void MainWindow::setFileCommand(QString const &path, bool save)
	{
	internalSetCommand(path, save, "FileCommand", &global->file_command);
	}

	void MainWindow::setGpgCommand(QString const &path, bool save)
	{
	internalSetCommand(path, save, "GpgCommand", &global->gpg_command);
	if (!global->gpg_command.isEmpty()) {
	GitPtr g = git();
	g->configGpgProgram(global->gpg_command, true);
	}
	}


	#ifdef Q_OS_WIN
	QString getWin32HttpProxy();
	#endif

	void MainWindow::initNetworking()
	{
	std::string http_proxy;
	std::string https_proxy;
	if (appsettings()->proxy_type == "auto") {
	#ifdef Q_OS_WIN
	http_proxy = misc::makeProxyServerURL(getWin32HttpProxy().toStdString());
	#else
	auto getienv = [](std::string const &name)->char const *{
	char **p = environ;
	while (*p) {
	if (strncasecmp(*p, name.c_str(), name.size()) == 0) {
	char const e = p + name.size();
	if (*e == '=') {
	return e + 1;
	}
	}
	p++;
	}
	return nullptr;
	};
	char const *p;
	p = getienv("http_proxy");
	if (p) {
	http_proxy = misc::makeProxyServerURL(std::string(p));
	}
	p = getienv("https_proxy");
	if (p) {
	https_proxy = misc::makeProxyServerURL(std::string(p));
	}
	#endif
	} else if (appsettings()->proxy_type == "manual") {
	http_proxy = appsettings()->proxy_server.toStdString();
	}
	m->webcx.set_http_proxy(http_proxy);
	m->webcx.set_https_proxy(https_proxy);
	}



	QStringList MainWindow::whichCommand_(QString const &cmdfile1, const QString &cmdfile2)
	{
	QStringList list;

	if (!cmdfile1.isEmpty()){
	std::vector<std::string> vec;
	FileUtil::which(cmdfile1.toStdString(), &vec);
	for (std::string const &s : vec) {
	list.push_back(QString::fromStdString(s));
	}
	}
	if (!cmdfile2.isEmpty()){
	std::vector<std::string> vec;
	FileUtil::which(cmdfile2.toStdString(), &vec);
	for (std::string const &s : vec) {
	list.push_back(QString::fromStdString(s));
	}
	}

	return list;
	}

	QString MainWindow::selectCommand_(QString const &cmdname, QStringList const &cmdfiles, QStringList const &list, QString path, std::function<void(QString const &)> callback)
	{
	QString window_title = tr("Select %1 command");
	window_title = window_title.arg(cmdfiles.front());

	SelectCommandDialog dlg(this, cmdname, cmdfiles, path, list);
	dlg.setWindowTitle(window_title);
	if (dlg.exec() == QDialog::Accepted) {
	path = dlg.selectedFile();
	path = misc::normalizePathSeparator(path);
	QFileInfo info(path);
	if (info.isExecutable()) {
	callback(path);
	return path;
	}
	}
	return QString();
	}

	QString MainWindow::selectCommand_(QString const &cmdname, QString const &cmdfile, QStringList const &list, QString path, std::function<void(QString const &)> callback)
	{
	QStringList cmdfiles;
	cmdfiles.push_back(cmdfile);
	return selectCommand_(cmdname, cmdfiles, list, path, callback);
	}

	#ifdef Q_OS_WIN
	#define GIT_COMMAND "git.exe"
	#define FILE_COMMAND "file.exe"
	#define GPG_COMMAND "gpg.exe"
	#define GPG2_COMMAND "gpg2.exe"
	#else
	#define GIT_COMMAND "git"
	#define FILE_COMMAND "file"
	#define GPG_COMMAND "gpg"
	#define GPG2_COMMAND "gpg2"
	#endif

	QString MainWindow::selectGitCommand(bool save)
	{
	char const *exe = GIT_COMMAND;

	QString path = m->gcx.git_command;

	auto fn = [&](QString const &path){
	setGitCommand(path, save);
	};

	QStringList list = whichCommand_(exe);
	#ifdef Q_OS_WIN
	{
	QStringList newlist;
	QString suffix1 = "\\bin\\" GIT_COMMAND;
	QString suffix2 = "\\cmd\\" GIT_COMMAND;
	for (QString const &s : list) {
	newlist.push_back(s);
	auto DoIt = [&](QString const &suffix){
	if (s.endsWith(suffix)) {
	QString t = s.mid(0, s.size() - suffix.size());
	QString t1 = t + "\\mingw64\\bin\\" GIT_COMMAND;
	if (misc::isExecutable(t1)) newlist.push_back(t1);
	QString t2 = t + "\\mingw\\bin\\" GIT_COMMAND;
	if (misc::isExecutable(t2)) newlist.push_back(t2);
	}
	};
	DoIt(suffix1);
	DoIt(suffix2);
	}
	std::sort(newlist.begin(), newlist.end());
	auto end = std::unique(newlist.begin(), newlist.end());
	list.clear();
	for (auto it = newlist.begin(); it != end; it++) {
	list.push_back(*it);
	}
	}
	#endif
	return selectCommand_("Git", exe, list, path, fn);
	}

	QString MainWindow::selectFileCommand(bool save)
	{
	char const *exe = FILE_COMMAND;

	QString path = global->file_command;

	auto fn = [&](QString const &path){
	setFileCommand(path, save);
	};

	QStringList list = whichCommand_(exe);

	#ifdef Q_OS_WIN
	QString dir = misc::getApplicationDir();
	QString path1 = dir / FILE_COMMAND;
	QString path2;
	int i = dir.lastIndexOf('/');
	int j = dir.lastIndexOf('\\');
	if (i < j) i = j;
	if (i > 0) {
	path2 = dir.mid(0, i) / FILE_COMMAND;
	}
	path1 = misc::normalizePathSeparator(path1);
	path2 = misc::normalizePathSeparator(path2);
	if (misc::isExecutable(path1)) list.push_back(path1);
	if (misc::isExecutable(path2)) list.push_back(path2);
	#endif

	return selectCommand_("File", exe, list, path, fn);
	}

	QString MainWindow::selectGpgCommand(bool save)
	{
	QString path = global->gpg_command;

	auto fn = [&](QString const &path){
	setGpgCommand(path, save);
	};

	QStringList list = whichCommand_(GPG_COMMAND, GPG2_COMMAND);

	QStringList cmdlist;
	cmdlist.push_back(GPG_COMMAND);
	cmdlist.push_back(GPG2_COMMAND);
	return selectCommand_("GPG", cmdlist, list, path, fn);
	}

	void MainWindow::checkUser()
	{
	Git g(m->gcx, QString());
	while (1) {
	Git::User user = g.getUser(Git::Source::Global);
	if (!user.name.isEmpty() && !user.email.isEmpty()) {
	return; // ok
	}
	if (!execSetGlobalUserDialog()) {
	return;
	}
	}
	}

	void MainWindow::dragEnterEvent(QDragEnterEvent *event)
	{
	if (QApplication::modalWindow()) return;

	if (event->mimeData()->hasUrls()) {
	event->acceptProposedAction();
	event->accept();
	}
	}

	void MainWindow::timerEvent(QTimerEvent *)
	{
	bool running = m->pty_process.isRunning();
	if (ui->toolButton_stop_process->isEnabled() != running) {
	ui->toolButton_stop_process->setEnabled(running);
	ui->action_stop_process->setEnabled(running);
	setNetworkingCommandsEnabled(!running);
	}
	if (!running) {
	m->interaction_mode = InteractionMode::None;
	}

	while (1) {
	char tmp[1024];
	int len = m->pty_process.readOutput(tmp, sizeof(tmp));
	if (len < 1) break;
	writeLog(tmp, len);
	}
	}

	void MainWindow::keyPressEvent(QKeyEvent *event)
	{
	if (focusWidget() == ui->widget_log) {
	int c = event->key();

	auto write_char = [&](char c){
	if (m->pty_process.isRunning()) {
	m->pty_process.writeInput(&c, 1);
	}
	};

	auto write_text = [&](QString const &str){
	std::string s = str.toStdString();
	for (int i = 0; i < (int)s.size(); i++) {
	write_char(s[i]);
	}
	};

	if (c == Qt::Key_Return \|\| c == Qt::Key_Enter) {
	write_char('\n');
	} else {
	QString text = event->text();
	write_text(text);
	}
	}
	}

	bool MainWindow::saveByteArrayAs(QByteArray const &ba, QString const &dstpath)
	{
	QFile file(dstpath);
	if (file.open(QFile::WriteOnly)) {
	file.write(ba);
	file.close();
	return true;
	} else {
	QString msg = "Failed to open the file '%1' for write";
	msg = msg.arg(dstpath);
	qDebug() << msg;
	}
	return false;
	}

	bool MainWindow::saveFileAs(QString const &srcpath, QString const &dstpath)
	{
	QFile f(srcpath);
	if (f.open(QFile::ReadOnly)) {
	QByteArray ba = f.readAll();
	if (saveByteArrayAs(ba, dstpath)) {
	return true;
	}
	} else {
	QString msg = "Failed to open the file '%1' for read";
	msg = msg.arg(srcpath);
	qDebug() << msg;
	}
	return false;
	}

	bool MainWindow::saveBlobAs(QString const &id, QString const &dstpath)
	{
	Git::Object obj = cat_file(id);
	if (!obj.content.isEmpty()) {
	if (saveByteArrayAs(obj.content, dstpath)) {
	return true;
	}
	} else {
	QString msg = "Failed to get the content of the object '%1'";
	msg = msg.arg(id);
	qDebug() << msg;
	}
	return false;
	}

	bool MainWindow::saveAs(QString const &id, QString const &dstpath)
	{
	if (id.startsWith(PATH_PREFIX)) {
	return saveFileAs(id.mid(1), dstpath);
	} else {
	return saveBlobAs(id, dstpath);
	}
	}

	QString MainWindow::saveAsTemp(QString const &id)
	{
	QString path = newTempFilePath();
	saveAs(id, path);
	return path;
	}

	void MainWindow::on_action_edit_settings_triggered()
	{
	SettingsDialog dlg(this);
	if (dlg.exec() == QDialog::Accepted) {
	ApplicationSettings const &newsettings = dlg.settings();
	m->appsettings = newsettings;
	setGitCommand(appsettings()->git_command, false);
	setFileCommand(appsettings()->file_command, false);
	setGpgCommand(appsettings()->gpg_command, false);
	}
	}

	bool MainWindow::git_callback(void cookie, char const ptr, int len)
	{
	MainWindow mw = (MainWindow )cookie;
	mw->writeLog(ptr, len);
	return true;
	}

	void MainWindow::clone()
	{
	if (!isRemoteOnline()) return;

	QString url;
	QString dir = defaultWorkingDir();
	while (1) {
	CloneDialog dlg(this, url, dir);
	if (dlg.exec() != QDialog::Accepted) {
	return;
	}

	url = dlg.url();
	dir = dlg.dir();

	if (dlg.action() == CloneDialog::Action::Clone) {
	// 既存チェック

	QFileInfo info(dir);
	if (info.isFile()) {
	QString msg = dir + "\n\n" + tr("A file with same name already exists");
	QMessageBox::warning(this, tr("Clone"), msg);
	continue;
	}
	if (info.isDir()) {
	QString msg = dir + "\n\n" + tr("A folder with same name already exists");
	QMessageBox::warning(this, tr("Clone"), msg);
	continue;
	}

	// クローン先ディレクトリを求める

	Git::CloneData clone_data = Git::preclone(url, dir);

	// クローン先ディレクトリの存在チェック

	QString basedir = misc::normalizePathSeparator(clone_data.basedir);
	if (!QFileInfo(basedir).isDir()) {
	int i = basedir.indexOf('/');
	int j = basedir.indexOf('\\');
	if (i < j) i = j;
	if (i < 0) {
	QString msg = basedir + "\n\n" + tr("Invalid folder");
	QMessageBox::warning(this, tr("Clone"), msg);
	continue;
	}

	QString msg = basedir + "\n\n" + tr("No such folder. Create it now ?");
	if (QMessageBox::warning(this, tr("Clone"), msg, QMessageBox::Ok, QMessageBox::Cancel) != QMessageBox::Ok) {
	continue;
	}

	// ディレクトリを作成

	QString base = basedir.mid(0, i + 1);
	QString sub = basedir.mid(i + 1);
	QDir(base).mkpath(sub);
	}

	m->temp_repo.local_dir = dir;
	m->temp_repo.local_dir.replace('\\', '/');
	m->temp_repo.name = makeRepositoryName(dir);

	GitPtr g = git(QString());
	m->pty_condition = PtyCondition::Clone;
	m->pty_process_ok = true;
	g->clone(clone_data, &m->pty_process);

	} else if (dlg.action() == CloneDialog::Action::AddExisting) {
	addWorkingCopyDir(dir, true);
	}

	return; // done
	}
	}

	void MainWindow::onCloneCompleted(bool success)
	{
	if (success) {
	saveRepositoryBookmark(m->temp_repo);
	m->current_repo = m->temp_repo;
	openRepository(true);
	}
	}

	void MainWindow::onPtyProcessCompleted()
	{
	switch (m->pty_condition) {
	case PtyCondition::Clone:
	onCloneCompleted(m->pty_process_ok);
	break;
	}
	m->pty_condition = PtyCondition::None;
	}

	void MainWindow::on_action_clone_triggered()
	{
	clone();
	}

	void MainWindow::on_action_about_triggered()
	{
	AboutDialog dlg(this);
	dlg.exec();
	}

	void MainWindow::on_toolButton_clone_clicked()
	{
	ui->action_clone->trigger();
	}

	void MainWindow::on_toolButton_fetch_clicked()
	{
	ui->action_fetch->trigger();
	}

	void MainWindow::clearRepoFilter()
	{
	ui->lineEdit_filter->clear();
	}

	void MainWindow::appendCharToRepoFilter(ushort c)
	{
	if (QChar(c).isLetter()) {
	c = QChar(c).toLower().unicode();
	}
	ui->lineEdit_filter->setText(m->repository_filter_text + c);
	}

	void MainWindow::backspaceRepoFilter()
	{
	QString s = m->repository_filter_text;
	int n = s.size();
	if (n > 0) {
	s = s.mid(0, n - 1);
	}
	ui->lineEdit_filter->setText(s);
	}

	void MainWindow::on_lineEdit_filter_textChanged(const QString &text)
	{
	m->repository_filter_text = text;
	updateRepositoriesList();
	}

	void MainWindow::on_toolButton_erase_filter_clicked()
	{
	clearRepoFilter();
	ui->lineEdit_filter->setFocus();
	}

	void MainWindow::deleteTags(QStringList const &tagnames)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	int row = ui->tableWidget_log->currentRow();

	if (!tagnames.isEmpty()) {
	reopenRepository(false, [&](GitPtr g){
	for (QString const &name : tagnames) {
	g->delete_tag(name, true);
	}
	});
	}

	ui->tableWidget_log->selectRow(row);
	}

	void MainWindow::deleteTags(const Git::CommitItem &commit)
	{
	auto it = m->tag_map.find(commit.commit_id);
	if (it != m->tag_map.end()) {
	QStringList names;
	QList<Git::Tag> const &tags = it->second;
	for (Git::Tag const &tag : tags) {
	names.push_back(tag.name);
	}
	deleteTags(names);
	}
	}



	void MainWindow::revertCommit()
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	Git::CommitItem const *commit = selectedCommitItem();
	if (commit) {
	g->revert(commit->commit_id);
	openRepository(false);
	}
	}

	bool MainWindow::addTag(QString const &name)
	{
	if (name.isEmpty()) return false;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return false;

	QString commit_id;

	Git::CommitItem const *commit = selectedCommitItem();
	if (commit && !commit->commit_id.isEmpty()) {
	commit_id = commit->commit_id;
	}

	if (!Git::isValidID(commit_id)) return false;

	int row = ui->tableWidget_log->currentRow();

	bool ok = false;
	reopenRepository(false, [&](GitPtr g){
	ok = g->tag(name, commit_id);
	});

	ui->tableWidget_log->selectRow(row);
	return ok;
	}

	//void MainWindow::addTag()
	//{
	// GitPtr g = git();
	// if (!isValidWorkingCopy(g)) return;

	// QString commit_id;

	// Git::CommitItem const *commit = selectedCommitItem();
	// if (commit && !commit->commit_id.isEmpty()) {
	// commit_id = commit->commit_id;
	// }

	// if (!Git::isValidID(commit_id)) return;

	// InputNewTagDialog dlg(this);
	// if (dlg.exec() == QDialog::Accepted) {
	// reopenRepository(false, [&](GitPtr g){
	// g->tag(dlg.text(), commit_id);
	// });
	// }
	//}

	//void MainWindow::on_action_tag_triggered()
	//{
	// addTag();
	//}

	void MainWindow::on_action_tag_push_all_triggered()
	{
	reopenRepository(false, [&](GitPtr g){
	g->push(true);
	});
	}



	QString MainWindow::tempfileHeader() const
	{
	QString name = "jp_soramimi_Guitar_%1_";
	return name.arg(QApplication::applicationPid());
	}

	void MainWindow::deleteTempFiles()
	{
	QString dir = QStandardPaths::writableLocation(QStandardPaths::TempLocation);
	QString name = tempfileHeader();
	QDirIterator it(dir, { name + "*" });
	while (it.hasNext()) {
	QString path = it.next();
	QFile::remove(path);
	}
	}

	QString MainWindow::newTempFilePath()
	{
	QString tmpdir = QStandardPaths::writableLocation(QStandardPaths::TempLocation);
	QString path = tmpdir / tempfileHeader() + QString::number(m->temp_file_counter);
	m->temp_file_counter++;
	return path;
	}

	QString MainWindow::determinFileType_(QString const &path, bool mime, std::function<void(QString const &cmd, QByteArray *ba)> callback) const
	{
	const_cast<MainWindow *>(this)->checkFileCommand();
	return misc::determinFileType(global->file_command, path, mime, callback);
	}

	QString MainWindow::determinFileType(QString const &path, bool mime)
	{
	return determinFileType_(path, mime, [](QString const &cmd, QByteArray *ba){
	misc2::runCommand(cmd, ba);
	});
	}

	QString MainWindow::determinFileType(QByteArray in, bool mime)
	{
	if (in.isEmpty()) return QString();

	if (in.size() > 10) {
	if (memcmp(in.data(), "\x1f\x8b\x08", 3) == 0) { // gzip
	QBuffer buf;
	MemoryReader reader(in.data(), in.size());
	reader.open(MemoryReader::ReadOnly);
	buf.open(QBuffer::WriteOnly);
	gunzip z;
	z.set_maximul_size(100000);
	z.decode(&reader, &buf);
	in = buf.buffer();
	}
	}

	// ファイル名を "-" にすると、リダイレクトで標準入力へ流し込める。
	return determinFileType_("-", mime, [&](QString const &cmd, QByteArray *ba){
	int r = misc2::runCommand(cmd, &in, ba);
	if (r != 0) {
	ba->clear();
	}
	});
	}

	void MainWindow::on_tableWidget_log_itemDoubleClicked(QTableWidgetItem *)
	{
	Git::CommitItem const *commit = selectedCommitItem();
	if (commit) {
	execCommitPropertyDialog(this, commit);
	}
	}

	void MainWindow::execFilePropertyDialog(QListWidgetItem *item)
	{
	if (item) {
	QString path = getFilePath(item);
	QString id = getObjectID(item);
	FilePropertyDialog dlg(this);
	dlg.exec(this, path, id);
	}
	}

	void MainWindow::on_listWidget_unstaged_itemDoubleClicked(QListWidgetItem * item)
	{
	execFilePropertyDialog(item);
	}

	void MainWindow::on_listWidget_staged_itemDoubleClicked(QListWidgetItem *item)
	{
	execFilePropertyDialog(item);
	}

	void MainWindow::on_listWidget_files_itemDoubleClicked(QListWidgetItem *item)
	{
	execFilePropertyDialog(item);
	}

	QListWidgetItem *MainWindow::currentFileItem() const
	{
	QListWidget *listwidget = nullptr;
	if (ui->stackedWidget->currentWidget() == ui->page_uncommited) {
	QWidget *w = qApp->focusWidget();
	if (w == ui->listWidget_unstaged) {
	listwidget = ui->listWidget_unstaged;
	} else if (w == ui->listWidget_staged) {
	listwidget = ui->listWidget_staged;
	}
	} else {
	listwidget = ui->listWidget_files;
	}
	if (listwidget) {
	return listwidget->currentItem();
	}
	return nullptr;
	}

	QPixmap MainWindow::getTransparentPixmap()
	{
	if (m->transparent_pixmap.isNull()) {
	m->transparent_pixmap = QPixmap(":/image/transparent.png");
	}
	return m->transparent_pixmap;
	}

	QString MainWindow::getCommitIdFromTag(QString const &tag)
	{
	return m->objcache.getCommitIdFromTag(tag);
	}

	bool MainWindow::isValidRemoteURL(const QString &url)
	{
	if (url.indexOf('\"') >= 0) {
	return false;
	}
	stopPtyProcess();
	GitPtr g = git(QString());
	QString cmd = "ls-remote \"%1\" HEAD";
	bool f = g->git(cmd.arg(url), false, false, &m->pty_process);
	{
	QTime time;
	time.start();
	while (!m->pty_process.wait(10)) {
	if (time.elapsed() > 10000) {
	f = false;
	break;
	}
	QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
	}
	stopPtyProcess();
	}
	QString line = g->resultText().trimmed();
	QString head;
	int i = line.indexOf('\t');
	if (i == GIT_ID_LENGTH) {
	QString id = line.mid(0, i);
	QString name = line.mid(i + 1);
	qDebug() << id << name;
	if (name == "HEAD" && Git::isValidID(id)) {
	head = id;
	}
	}
	if (f) {
	qDebug() << "This is a valid repository.";
	if (head.isEmpty()) {
	qDebug() << "But HEAD not found";
	}
	return true;
	} else {
	qDebug() << "It is not a repository.";
	}
	return false;
	}

	bool MainWindow::testRemoteRepositoryValidity(QString const &url)
	{
	bool ok;
	{
	OverrideWaitCursor;
	ok = isValidRemoteURL(url);
	}

	QString pass = tr("The URL is a valid repository");
	QString fail = tr("Failed to access the URL");

	QString text = "%1\n\n%2";
	text = text.arg(url).arg(ok ? pass : fail);

	QString title = tr("Remote Repository");

	if (ok) {
	QMessageBox::information(this, title, text);
	} else {
	QMessageBox::critical(this, title, text);
	}

	return ok;
	}

	bool MainWindow::execSetGlobalUserDialog()
	{
	SetGlobalUserDialog dlg(this);
	if (dlg.exec() == QDialog::Accepted) {
	GitPtr g = git();
	Git::User user = dlg.user();
	g->setUser(user, true);
	updateWindowTitle(g);
	return true;
	}
	return false;
	}

	void MainWindow::execSetUserDialog(Git::User const &global_user, Git::User const &repo_user, QString const &reponame)
	{
	SetUserDialog dlg(this, global_user, repo_user, reponame);
	if (dlg.exec() == QDialog::Accepted) {
	GitPtr g = git();
	Git::User user = dlg.user();
	if (dlg.isGlobalChecked()) {
	g->setUser(user, true);
	}
	if (dlg.isRepositoryChecked()) {
	g->setUser(user, false);
	}
	updateWindowTitle(g);
	}
	}

	void MainWindow::on_action_set_config_user_triggered()
	{
	Git::User global_user;
	Git::User repo_user;
	GitPtr g = git();
	if (isValidWorkingCopy(g)) {
	repo_user = g->getUser(Git::Source::Local);
	}
	global_user = g->getUser(Git::Source::Global);

	execSetUserDialog(global_user, repo_user, currentRepositoryName());
	}

	void MainWindow::on_action_window_log_triggered(bool checked)
	{
	ui->dockWidget_log->setVisible(checked);
	}

	NamedCommitList MainWindow::namedCommitItems(int flags)
	{
	std::map<QString, NamedCommitItem> map;
	if (flags & Branches) {
	for (auto pair: m->branch_map) {
	QList<Git::Branch> const &list = pair.second;
	for (Git::Branch const &b : list) {
	if (b.isHeadDetached()) continue;
	QString key = b.name;
	if (flags & NamedCommitFlag::Remotes) {
	if (!b.remote.isEmpty()) {
	key = "remotes" / b.remote / key;
	}
	} else {
	if (!b.remote.isEmpty()) continue;
	}
	NamedCommitItem item;
	item.type = NamedCommitItem::Type::Branch;
	item.remote = b.remote;
	item.name = b.name;
	item.id = b.id;
	map[key] = item;
	}
	}
	}
	if (flags & Tags) {
	for (auto pair: m->tag_map) {
	QList<Git::Tag> const &list = pair.second;
	for (Git::Tag const &t : list) {
	NamedCommitItem item;
	item.type = NamedCommitItem::Type::Tag;
	item.name = t.name;
	item.id = t.id;
	map[item.name] = item;
	}
	}
	}
	NamedCommitList items;
	for (auto const &pair : map) {
	items.push_back(pair.second);
	}
	return items;
	}

	int MainWindow::rowFromCommitId(QString const &id)
	{
	for (size_t i = 0; i < m->logs.size(); i++) {
	Git::CommitItem const &item = m->logs[i];
	if (item.commit_id == id) {
	return (int)i;
	}
	}
	return -1;
	}

	void MainWindow::on_action_repo_jump_triggered()
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	NamedCommitList items = namedCommitItems(Branches \| Tags \| Remotes);
	JumpDialog::sort(&items);
	{
	NamedCommitItem head;
	head.name = "HEAD";
	head.id = m->head_id;
	items.push_front(head);
	}
	JumpDialog dlg(this, items);
	if (dlg.exec() == QDialog::Accepted) {
	JumpDialog::Action action = dlg.action();
	if (action == JumpDialog::Action::BranchsAndTags) {
	QString name = dlg.text();
	QString id = g->rev_parse(name);
	if (g->objectType(id) == "tag") {
	id = m->objcache.getCommitIdFromTag(id);
	}
	int row = rowFromCommitId(id);
	if (row < 0) {
	QMessageBox::warning(this, tr("Jump"), QString("%1\n(%2)\n\n").arg(name).arg(id) + tr("That commmit has not foud or not read yet"));
	} else {
	setCurrentLogRow(row);

	if (dlg.isCheckoutChecked()) {
	NamedCommitItem item;
	for (NamedCommitItem const &t : items) {
	if (t.name == name) {
	item = t;
	break;
	}
	}
	bool ok = false;
	if (item.type == NamedCommitItem::Type::Branch) {
	ok = g->git(QString("checkout \"%1\"").arg(name), true);
	} else if (item.type == NamedCommitItem::Type::Tag) {
	ok = g->git(QString("checkout -b \"%1\" \"%2\"").arg(name).arg(id), true);
	}
	if (ok) {
	openRepository(true);
	}
	}
	}
	} else if (action == JumpDialog::Action::CommitId) {
	QString id = dlg.text();
	jumpToCommit(id);
	}
	}
	}

	void MainWindow::jumpToCommit(QString id)
	{
	GitPtr g = git();
	id = g->rev_parse(id);
	if (!id.isEmpty()) {
	int row = rowFromCommitId(id);
	setCurrentLogRow(row);
	}
	}

	void MainWindow::checkout(QWidget parent, Git::CommitItem const commit)
	{
	if (!commit) return;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	QStringList tags;
	QStringList local_branches;
	QStringList remote_branches;
	{
	NamedCommitList named_commits = namedCommitItems(Branches \| Tags \| Remotes);
	JumpDialog::sort(&named_commits);
	for (NamedCommitItem const &item : named_commits) {
	if (item.id == commit->commit_id) {
	QString name = item.name;
	if (item.type == NamedCommitItem::Type::Tag) {
	tags.push_back(name);
	} else if (item.type == NamedCommitItem::Type::Branch) {
	int i = name.lastIndexOf('/');
	if (i < 0 && name == "HEAD") continue;
	if (i > 0 && name.mid(i + 1) == "HEAD") continue;
	if (item.remote.isNull()) {
	local_branches.push_back(name);
	} else {
	remote_branches.push_back(name);
	}
	}
	}
	}
	}

	CheckoutDialog dlg(parent, tags, local_branches, remote_branches);
	if (dlg.exec() == QDialog::Accepted) {
	CheckoutDialog::Operation op = dlg.operation();
	QString name = dlg.branchName();
	QString id = commit->commit_id;
	bool ok = false;
	setLogEnabled(g, true);
	if (op == CheckoutDialog::Operation::HeadDetached) {
	ok = g->git(QString("checkout \"%1\"").arg(id), true);
	} else if (op == CheckoutDialog::Operation::CreateLocalBranch) {
	ok = g->git(QString("checkout -b \"%1\" \"%2\"").arg(name).arg(id), true);
	} else if (op == CheckoutDialog::Operation::ExistingLocalBranch) {
	ok = g->git(QString("checkout \"%1\"").arg(name), true);
	}
	if (ok) {
	openRepository(true);
	}
	}
	}

	void MainWindow::deleteBranch(Git::CommitItem const *commit)
	{
	if (!commit) return;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	QStringList all_local_branch_names;
	QStringList current_local_branch_names;
	{
	NamedCommitList named_commits = namedCommitItems(Branches);
	JumpDialog::sort(&named_commits);
	for (NamedCommitItem const &item : named_commits) {
	if (item.name == "HEAD") continue;
	if (item.id == commit->commit_id) {
	current_local_branch_names.push_back(item.name);
	}
	all_local_branch_names.push_back(item.name);
	}
	}

	DeleteBranchDialog dlg(this, all_local_branch_names, current_local_branch_names);
	if (dlg.exec() == QDialog::Accepted) {
	setLogEnabled(g, true);
	QStringList names = dlg.selectedBranchNames();
	int count = 0;
	for (QString const &name : names) {
	if (g->git(QString("branch -D \"%1\"").arg(name))) {
	count++;
	} else {
	writeLog(tr("Failed to delete the branch '%1'\n").arg(name));
	}
	}
	if (count > 0) {
	openRepository(true);
	}
	}
	}

	void MainWindow::mergeBranch(Git::CommitItem const *commit)
	{
	if (!commit) return;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	g->mergeBranch(commit->commit_id);
	openRepository(true);
	}

	void MainWindow::cherrypick(Git::CommitItem const *commit)
	{
	if (!commit) return;

	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	g->cherrypick(commit->commit_id);
	openRepository(true);
	}

	void MainWindow::checkout()
	{
	checkout(this, selectedCommitItem());
	}

	void MainWindow::deleteBranch()
	{
	deleteBranch(selectedCommitItem());
	}

	void MainWindow::on_action_repo_checkout_triggered()
	{
	checkout();
	}

	void MainWindow::on_action_delete_branch_triggered()
	{
	deleteBranch();
	}

	bool MainWindow::runOnRepositoryDir(std::function<void(QString)> callback, RepositoryItem const *repo)
	{
	if (!repo) {
	repo = &m->current_repo;
	}
	QString dir = repo->local_dir;
	dir.replace('\\', '/');
	if (QFileInfo(dir).isDir()) {
	callback(dir);
	return true;
	}
	QMessageBox::warning(this, qApp->applicationName(), tr("No repository selected"));
	return false;
	}

	#ifdef Q_OS_MAC
	namespace {

	bool isValidDir(QString const &dir)
	{
	if (dir.indexOf('\"') >= 0 \|\| dir.indexOf('\\') >= 0) return false;
	return QFileInfo(dir).isDir();
	}

	}
	#endif

	void MainWindow::openTerminal(RepositoryItem const *repo)
	{
	runOnRepositoryDir([](QString dir){
	#ifdef Q_OS_MAC
	if (!isValidDir(dir)) return;
	QString cmd = "open -n -a /Applications/Utilities/Terminal.app --args \"%1\"";
	cmd = cmd.arg(dir);
	QProcess::execute(cmd);
	#else
	Terminal::open(dir);
	#endif
	}, repo);
	}

	void MainWindow::openExplorer(RepositoryItem const *repo)
	{
	runOnRepositoryDir([](QString dir){
	#ifdef Q_OS_MAC
	if (!isValidDir(dir)) return;
	QString cmd = "open \"%1\"";
	cmd = cmd.arg(dir);
	QProcess::execute(cmd);
	#else
	QDesktopServices::openUrl(dir);
	#endif
	}, repo);
	}

	void MainWindow::on_toolButton_terminal_clicked()
	{
	openTerminal(nullptr);
	}

	void MainWindow::on_toolButton_explorer_clicked()
	{
	openExplorer(nullptr);
	}

	void MainWindow::pushSetUpstream(QString const &remote, QString const &branch)
	{
	if (remote.isEmpty()) return;
	if (branch.isEmpty()) return;

	int exitcode = 0;
	QString errormsg;

	reopenRepository(true, [&](GitPtr g){
	g->push_u(remote, branch, &m->pty_process);
	while (1) {
	if (m->pty_process.wait(1)) break;
	QApplication::processEvents();
	}
	exitcode = m->pty_process.getExitCode();
	errormsg = m->pty_process.getMessage();
	});

	if (exitcode == 128) {
	if (errormsg.indexOf("Connection refused") >= 0) {
	QMessageBox::critical(this, qApp->applicationName(), tr("Connection refused."));
	return;
	}
	}

	updateRemoteInfo();
	}

	bool MainWindow::pushSetUpstream(bool testonly)
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return false;
	QStringList remotes = g->getRemotes();

	QString current_branch = currentBranch().name;

	QStringList branches;
	for (Git::Branch const &b : g->branches()) {
	branches.push_back(b.name);
	}

	if (remotes.isEmpty() \|\| branches.isEmpty()) {
	return false;
	}

	if (testonly) {
	return true;
	}

	PushDialog dlg(this, remotes, branches, PushDialog::RemoteBranch(QString(), current_branch));
	if (dlg.exec() == QDialog::Accepted) {
	PushDialog::Action a = dlg.action();
	if (a == PushDialog::PushSimple) {
	ui->action_push->trigger();
	} else if (a == PushDialog::PushSetUpstream) {
	QString remote = dlg.remote();
	QString branch = dlg.branch();
	pushSetUpstream(remote, branch);
	}
	return true;
	}

	return false;
	}




	void MainWindow::on_action_reset_HEAD_1_triggered()
	{
	GitPtr g = git();
	if (!isValidWorkingCopy(g)) return;

	g->reset_head1();
	openRepository(false);
	}

	void MainWindow::on_action_create_a_repository_triggered()
	{
	CreateRepositoryDialog dlg(this);
	if (dlg.exec() == QDialog::Accepted) {
	QString path = dlg.path();
	if (QFileInfo(path).isDir()) {
	if (Git::isValidWorkingCopy(path)) {
	// A valid git repository already exists there.
	} else {
	GitPtr g = git(path);
	if (g->init()) {
	QString name = dlg.name();
	if (!name.isEmpty()) {
	addWorkingCopyDir(path, name, true);
	}
	QString remote_name = dlg.remoteName();
	QString remote_url = dlg.remoteURL();
	if (!remote_name.isEmpty() && !remote_url.isEmpty()) {
	g->addRemoteURL(remote_name, remote_url);
	}
	}
	}
	} else {
	// not dir
	}
	}
	}

	bool MainWindow::isRemoteOnline() const
	{
	return ui->radioButton_remote_online->isChecked();
	}

	void MainWindow::setNetworkingCommandsEnabled(bool f)
	{
	ui->action_clone->setEnabled(f);

	ui->toolButton_clone->setEnabled(f);

	if (!Git::isValidWorkingCopy(currentWorkingCopyDir())) {
	f = false;
	}

	ui->action_fetch->setEnabled(f);
	ui->action_pull->setEnabled(f);
	ui->action_push->setEnabled(f);

	ui->toolButton_fetch->setEnabled(f);
	ui->toolButton_pull->setEnabled(f);
	ui->toolButton_push->setEnabled(f);
	}

	void MainWindow::setRemoteOnline(bool f)
	{
	QRadioButton *rb = nullptr;
	rb = f ? ui->radioButton_remote_online : ui->radioButton_remote_offline;
	rb->blockSignals(true);
	rb->click();
	rb->blockSignals(false);

	setNetworkingCommandsEnabled(f);

	MySettings s;
	s.beginGroup("Remote");
	s.setValue("Online", f);
	s.endGroup();
	}

	void MainWindow::on_radioButton_remote_online_clicked()
	{
	setRemoteOnline(true);
	}

	void MainWindow::on_radioButton_remote_offline_clicked()
	{
	setRemoteOnline(false);
	}

	void MainWindow::on_verticalScrollBar_log_valueChanged(int)
	{
	ui->widget_log->refrectScrollBar();
	}

	void MainWindow::on_horizontalScrollBar_log_valueChanged(int)
	{
	ui->widget_log->refrectScrollBar();
	}

	void MainWindow::stopPtyProcess()
	{
	m->pty_process.stop();
	QDir::setCurrent(m->starting_dir);
	}

	void MainWindow::abortPtyProcess()
	{
	stopPtyProcess();
	m->pty_process_ok = false;
	m->interaction_canceled = true;
	}

	void MainWindow::on_toolButton_stop_process_clicked()
	{
	abortPtyProcess();
	}

	void MainWindow::on_action_stop_process_triggered()
	{
	abortPtyProcess();
	}

	void MainWindow::on_action_exit_triggered()
	{
	close();
	}

	void MainWindow::on_action_reflog_triggered()
	{
	GitPtr g = git();
	Git::ReflogItemList reflog;
	g->reflog(&reflog);

	ReflogWindow dlg(this, this, reflog);
	dlg.exec();
	}

	void MainWindow::blame(QListWidgetItem *item)
	{
	QList<BlameItem> list;
	QString path = getFilePath(item);
	{
	GitPtr g = git();
	QByteArray ba = g->blame(path);
	if (!ba.isEmpty()) {
	char const *begin = ba.data();
	char const *end = begin + ba.size();
	list = BlameWindow::parseBlame(begin, end);
	}
	}
	if (!list.isEmpty()) {
	qApp->setOverrideCursor(Qt::WaitCursor);
	BlameWindow win(this, path, list);
	qApp->restoreOverrideCursor();
	win.exec();
	}
	}

	void MainWindow::blame()
	{
	blame(currentFileItem());
	}

	void MainWindow::execCommitViewWindow(Git::CommitItem const *commit)
	{
	CommitViewWindow win(this, commit);
	win.exec();
	}

	void MainWindow::on_action_repository_property_triggered()
	{
	execRepositoryPropertyDialog(currentWorkingCopyDir());
	}

	void MainWindow::on_action_set_gpg_signing_triggered()
	{
	GitPtr g = git();
	QString global_key_id = g->signingKey(Git::Source::Global);
	QString repository_key_id;
	if (g->isValidWorkingCopy()) {
	repository_key_id = g->signingKey(Git::Source::Local);
	}
	SetGpgSigningDialog dlg(this, currentRepositoryName(), global_key_id, repository_key_id);
	if (dlg.exec() == QDialog::Accepted) {
	g->setSigningKey(dlg.id(), dlg.isGlobalChecked());
	}
	}

	void MainWindow::execAreYouSureYouWantToContinueConnectingDialog()
	{
	using TheDlg = AreYouSureYouWantToContinueConnectingDialog;

	m->interaction_mode = InteractionMode::Busy;

	QApplication::restoreOverrideCursor();

	TheDlg dlg(this);
	if (dlg.exec() == QDialog::Accepted) {
	TheDlg::Result r = dlg.result();
	if (r == TheDlg::Result::Yes) {
	m->pty_process.writeInput("yes\n", 4);
	} else {
	m->pty_process_ok = false; // abort
	m->pty_process.writeInput("no\n", 3);
	QThread::msleep(300);
	stopPtyProcess();
	}
	} else {
	ui->widget_log->setFocus();
	m->interaction_canceled = true;
	}
	m->interaction_mode = InteractionMode::Busy;
	}

	void MainWindow::onLogIdle()
	{
	if (m->interaction_canceled) return;
	if (m->interaction_mode != InteractionMode::None) return;

	static char const are_you_sure_you_want_to_continue_connecting[] = "Are you sure you want to continue connecting (yes/no)?";
	static char const enter_passphrase[] = "Enter passphrase: ";

	std::vector<char> vec;
	ui->widget_log->retrieveLastText(&vec, 100);
	if (vec.size() > 0) {
	std::string line;
	int n = (int)vec.size();
	int i = n;
	while (i > 0) {
	i--;
	if (i + 1 < n && vec[i] == '\n') {
	i++;
	line.assign(&vec[i], n - i);
	break;
	}
	}
	if (!line.empty()) {
	auto Match = [&](char const *str){
	int n = strlen(str);
	if (strncmp(line.c_str(), str, n) == 0) {
	char const *p = line.c_str() + n;
	while (1) {
	if (!*p) return true;
	if (!isspace((unsigned char)*p)) break;
	p++;
	}
	}
	return false;
	};

	if (Match(are_you_sure_you_want_to_continue_connecting)) {
	execAreYouSureYouWantToContinueConnectingDialog();
	return;
	}

	if (line == enter_passphrase) {
	LineEditDialog dlg(this, "Passphrase", QString::fromStdString(line), true);
	if (dlg.exec() == QDialog::Accepted) {
	std::string text = dlg.text().toStdString() + '\n';
	m->pty_process.writeInput(text.c_str(), text.size());
	} else {
	m->pty_process_ok = false;
	stopPtyProcess();
	}
	return;
	}

	char const *begin = line.c_str();
	char const *end = line.c_str() + line.size();
	auto Input = [&](QString const &title, bool password){
	std::string header = QString("%1 for '").arg(title).toStdString();
	if (strncmp(begin, header.c_str(), header.size()) == 0) {
	QString msg;
	if (memcmp(end - 2, "':", 2) == 0) {
	msg = QString::fromUtf8(begin, end - begin - 1);
	} else if (memcmp(end - 3, "': ", 3) == 0) {
	msg = QString::fromUtf8(begin, end - begin - 2);
	}
	if (!msg.isEmpty()) {
	LineEditDialog dlg(this, title, msg, password);
	if (dlg.exec() == QDialog::Accepted) {
	std::string text = dlg.text().toStdString() + '\n';
	m->pty_process.writeInput(text.c_str(), text.size());
	} else {
	m->pty_process_ok = false;
	stopPtyProcess();
	}
	return true;
	}
	}
	return false;
	};
	if (Input("Username", false)) return;
	if (Input("Password", true)) return;
	}
	}
	}

	QList<Git::Tag> MainWindow::queryTagList()
	{
	QList<Git::Tag> list;
	Git::CommitItem const *commit = selectedCommitItem();
	if (commit && Git::isValidID(commit->commit_id)) {
	list = findTag(commit->commit_id);
	}
	return list;
	}

	void MainWindow::on_action_edit_tags_triggered()
	{
	Git::CommitItem const *commit = selectedCommitItem();
	if (commit && Git::isValidID(commit->commit_id)) {
	EditTagsDialog dlg(this, commit);
	dlg.exec();
	}
	}

	void MainWindow::on_action_test_triggered()
	{
	}

	diff --git a/src/texteditor/AbstractCharacterBasedApplication.cpp b/src/texteditor/AbstractCharacterBasedApplication.cpp
	index b76b80d..3016160 100644
	--- a/src/texteditor/AbstractCharacterBasedApplication.cpp
	+++ b/src/texteditor/AbstractCharacterBasedApplication.cpp
	@@ -1,2533 +1,2564 @@
	#include "AbstractCharacterBasedApplication.h"
	#include "UnicodeWidth.h"
	#include "unicode.h"

	#include <QApplication>
	#include <QClipboard>
	#include <QDebug>
	#include <QFile>
	#include <QTextCodec>
	#include "unicode.h"

	using WriteMode = AbstractCharacterBasedApplication::WriteMode;
	using FormattedLine = AbstractCharacterBasedApplication::FormattedLine;

	class EsccapeSequence {
	private:
	int offset = 0;
	unsigned char data[100];
	int color_fg = -1;
	int color_bg = -1;
	public:
	bool isActive() const
	{
	return offset > 0;
	}
	void write(char c)
	{
	if (c == 0x1b) {
	data[0] = c;
	offset = 1;
	return;
	}
	data[offset] = c;
	if (offset > 0) {
	if (c == 'm') {
	if (data[1] == '[' && isdigit(data[2]) && isdigit(data[3])) {
	data[offset] = 0;
	if (data[2] == '3') {
	color_fg = atoi((char const *)data + 3);
	if (color_fg == 9) {
	color_fg = -1;
	}
	}
	if (data[2] == '4') {
	color_bg = atoi((char const *)data + 3);
	if (color_bg == 9) {
	color_bg = -1;
	}
	}
	}
	offset = 0;
	return;
	}
	if (offset + 1 < (int)sizeof(data)) {
	offset++;
	}
	}
	}
	int fg_color_code() const
	{
	return color_fg == 9 ? -1 : color_fg;
	}
	int bg_color_code() const
	{
	return color_bg == 9 ? -1 : color_bg;
	}
	};

	struct AbstractCharacterBasedApplication::Private {
	bool is_changed = false;
	bool is_quit_enabled = false;
	bool is_open_enabled = false;
	bool is_save_enabled = false;
	bool is_toggle_selection_anchor_enabled = true;
	bool is_read_only = false;
	bool is_terminal_mode = false;
	bool is_cursor_visible = true;
	State state = State::Normal;
	int header_line = 1;
	int footer_line = 1;
	int screen_width = 80;
	int screen_height = 24;
	bool auto_layout = false;
	QString recently_used_path;
	bool show_line_number = true;
	int left_margin = AbstractCharacterBasedApplication::LEFT_MARGIN;
	QString dialog_title;
	QString dialog_value;
	std::vector<Character> screen;
	std::vector<uint8_t> line_flags;
	int parsed_row_index = -1;
	int parsed_col_index = -1;
	bool parsed_for_edit = false;
	QByteArray parsed_line;
	std::vector<uint32_t> prepared_current_line;
	QList<Document::CharAttr_> syntax_table;
	bool dialog_mode = false;
	DialogHandler dialog_handler;
	bool is_painting_suppressed = false;
	int valid_line_index = -1;
	int line_margin = 3;
	WriteMode write_mode = WriteMode::Insert;
	QTextCodec *text_codec = nullptr;
	Qt::KeyboardModifiers keyboard_modifiers = Qt::KeyboardModifier::NoModifier;
	bool ctrl_modifier = false;
	bool shift_modifier = false;
	EsccapeSequence escape_sequence;
	};

	AbstractCharacterBasedApplication::AbstractCharacterBasedApplication()
	: m(new Private)
	{
	}

	AbstractCharacterBasedApplication::~AbstractCharacterBasedApplication()
	{
	delete m;
	}

	void AbstractCharacterBasedApplication::setModifierKeys(Qt::KeyboardModifiers keymod)
	{
	m->keyboard_modifiers = keymod;
	m->ctrl_modifier = m->keyboard_modifiers & Qt::ControlModifier;
	m->shift_modifier = m->keyboard_modifiers & Qt::ShiftModifier;
	}

	void AbstractCharacterBasedApplication::clearShiftModifier()
	{
	m->shift_modifier = false;
	}

	bool AbstractCharacterBasedApplication::isControlModifierPressed() const
	{
	return m->ctrl_modifier;
	}

	bool AbstractCharacterBasedApplication::isShiftModifierPressed() const
	{
	return m->shift_modifier;
	}

	void AbstractCharacterBasedApplication::setTextCodec(QTextCodec *codec)
	{
	m->text_codec = codec;
	clearParsedLine();
	invalidateArea();
	makeBuffer();
	}

	void AbstractCharacterBasedApplication::setAutoLayout(bool f)
	{
	m->auto_layout = f;
	layoutEditor();
	}

	void AbstractCharacterBasedApplication::showHeader(bool f)
	{
	m->header_line = f ? 1 : 0;
	layoutEditor();
	}

	void AbstractCharacterBasedApplication::showFooter(bool f)
	{
	m->footer_line = f ? 1 : 0;
	layoutEditor();
	}

	void AbstractCharacterBasedApplication::showLineNumber(bool show, int left_margin)
	{
	m->show_line_number = show;
	m->left_margin = left_margin;
	}

	void AbstractCharacterBasedApplication::setCursorVisible(bool show)
	{
	m->is_cursor_visible = show;
	}

	bool AbstractCharacterBasedApplication::isCursorVisible()
	{
	return m->is_cursor_visible;
	}

	void AbstractCharacterBasedApplication::retrieveLastText(std::vector<char> *out, int maxlen) const
	{
	const_cast<AbstractCharacterBasedApplication *>(this)->document()->retrieveLastText(out, maxlen);
	}

	bool AbstractCharacterBasedApplication::isChanged() const
	{
	return m->is_changed;
	}

	void AbstractCharacterBasedApplication::setChanged(bool f)
	{
	m->is_changed = f;
	}

	int AbstractCharacterBasedApplication::leftMargin_() const
	{
	return m->left_margin;
	}

	void AbstractCharacterBasedApplication::setRecentlyUsedPath(QString const &path)
	{
	m->recently_used_path = path;
	}

	QString AbstractCharacterBasedApplication::recentlyUsedPath()
	{
	return m->recently_used_path;
	}

	std::vector<AbstractCharacterBasedApplication::Character> *AbstractCharacterBasedApplication::screen()
	{
	return &m->screen;
	}

	const std::vector<AbstractCharacterBasedApplication::Character> *AbstractCharacterBasedApplication::screen() const
	{
	return &m->screen;
	}

	std::vector<uint8_t> *AbstractCharacterBasedApplication::line_flags()
	{
	return &m->line_flags;
	}

	void AbstractCharacterBasedApplication::makeBuffer()
	{
	int w = screenWidth();
	int h = screenHeight();
	int size = w * h;
	m->screen.resize(size);
	std::fill(m->screen.begin(), m->screen.end(), Character());
	m->line_flags.resize(h);
	}

	void AbstractCharacterBasedApplication::layoutEditor()
	{
	makeBuffer();
	editor_cx->viewport_org_x = leftMargin_();
	editor_cx->viewport_org_y = m->header_line;
	editor_cx->viewport_width = screenWidth() - cx()->viewport_org_x;
	editor_cx->viewport_height = screenHeight() - (m->header_line + m->footer_line);
	}

	void AbstractCharacterBasedApplication::initEditor()
	{
	editor_cx = std::shared_ptr<TextEditorContext>(new TextEditorContext());
	layoutEditor();
	}

	bool AbstractCharacterBasedApplication::isLineNumberVisible() const
	{
	return m->show_line_number;
	}

	int AbstractCharacterBasedApplication::charWidth(uint32_t c)
	{
	return UnicodeWidth::width(UnicodeWidth::type(c));
	}

	QList<FormattedLine> AbstractCharacterBasedApplication::formatLine(Document::Line const &line, int tab_span, int anchor_a, int anchor_b) const
	{
	QByteArray ba;
	if (m->text_codec) {
	ba = m->text_codec->toUnicode(line.text).toUtf8();
	} else {
	ba = line.text;
	}

	std::vector<ushort> vec;
	vec.reserve(ba.size() + 100);
	size_t len = ba.size();
	QList<FormattedLine> res;

	int col = 0;
	int col_start = col;

	bool flag_a = false;
	bool flag_b = false;

	auto Color = [&](size_t offset, size_t *next_offset){
	int i = findSyntax(&m->syntax_table, offset);
	if (i < m->syntax_table.size() && m->syntax_table[i].offset <= offset) {
	if (next_offset) {
	if (i + 1 < m->syntax_table.size()) {
	*next_offset = m->syntax_table[i + 1].offset;
	} else {
	*next_offset = -1;
	}
	}
	static int color[] = {
	0x000000,
	0x0000ff,
	0x00ff00,
	0x00ffff,
	0xff0000,
	0xff00ff,
	0xffff00,
	0xffffff,
	};
	i = m->syntax_table[i].color;
	if (i >= 0 && i < 8) {
	return color[i];
	}
	}
	if (next_offset) {
	*next_offset = -1;
	}
	return 0;
	};


	auto Flush = [&](size_t offset, size_t *next_offset){
	if (!vec.empty()) {
	int atts = 0;
	atts \|= Color(offset, next_offset);
	if (anchor_a >= 0 \|\| anchor_b >= 0) {
	if ((anchor_a < 0 \|\| col_start >= anchor_a) && (anchor_b == -1 \|\| col_start < anchor_b)) {
	atts \|= FormattedLine::Selected;
	}
	}
	ushort const *left = &vec[0];
	ushort const *right = left + vec.size();
	while (left < right && (right[-1] == '\r' \|\| right[-1] == '\n')) right--;
	if (left < right) {
	res.push_back(FormattedLine(QString::fromUtf16(left, right - left), atts));
	}
	vec.clear();
	} else {
	*next_offset = -1;
	}
	col_start = col;
	};

	size_t offset = 0;
	size_t next_offset = -1;
	if (len > 0) {
	{
	size_t o = line.byte_offset;
	int i = findSyntax(&m->syntax_table, o);
	if (i < m->syntax_table.size() && m->syntax_table[i].offset <= o) {
	if (i + 1 < m->syntax_table.size()) {
	o = m->syntax_table[i + 1].offset;
	if (o != (size_t)-1) {
	next_offset = o;
	}
	}
	}
	}
	utf8 u8(ba.data(), len);
	u8.to_utf32([&](uint32_t c){
	if (line.byte_offset + u8.offset() == next_offset) {
	Flush(line.byte_offset + offset, &next_offset);
	offset += u8.offset();
	}
	if (c == '\t') {
	do {
	vec.push_back(' ');
	col++;
	} while (col % tab_span != 0);
	} else if (c < ' ') {
	// nop
	} else {
	int cw = charWidth(c);
	if (c < 0xffff) {
	vec.push_back(c);
	} else {
	int a = c >> 16;
	if (a > 0 && a <= 0x20) {
	a--;
	int b = c & 0x03ff;
	a = (a << 6) \| ((c >> 10) & 0x003f);
	a \|= 0xd800;
	b \|= 0xdc00;
	vec.push_back(a);
	vec.push_back(b);
	}
	}
	col += cw;
	}
	if ((anchor_a >= 0 \|\| anchor_b >= 0) && anchor_a != anchor_b) {
	if (!flag_a && col >= anchor_a) {
	Flush(line.byte_offset + offset, &next_offset);
	flag_a = true;
	}
	if (!flag_b && col >= anchor_b) {
	Flush(line.byte_offset + offset, &next_offset);
	flag_b = true;
	}
	}
	return true;
	});
	}
	Flush(line.byte_offset + offset, &next_offset);
	return res;
	}

	void AbstractCharacterBasedApplication::fetchCurrentLine() const
	{
	QByteArray line;
	const int row = cx()->current_row;
	int lines = documentLines();
	if (row >= 0 && row < lines) {
	line = cx()->engine->document.lines[row].text;
	}
	m->parsed_row_index = row;
	m->parsed_line = line;
	}

	void AbstractCharacterBasedApplication::clearParsedLine()
	{
	m->parsed_row_index = -1;
	m->parsed_for_edit = false;
	m->parsed_line.clear();
	}

	int AbstractCharacterBasedApplication::cursorX() const
	{
	return cx()->current_col - cx()->scroll_col_pos;
	}

	int AbstractCharacterBasedApplication::cursorY() const
	{
	return cx()->current_row - cx()->scroll_row_pos;
	}

	int AbstractCharacterBasedApplication::screenWidth() const
	{
	return m->screen_width;
	}

	int AbstractCharacterBasedApplication::screenHeight() const
	{
	return m->screen_height;
	}

	void AbstractCharacterBasedApplication::setScreenSize(int w, int h, bool update_layout)
	{
	m->screen_width = w;
	m->screen_height = h;
	if (update_layout) {
	layoutEditor();
	}
	}

	bool AbstractCharacterBasedApplication::isPaintingSuppressed() const
	{
	return m->is_painting_suppressed;
	}

	void AbstractCharacterBasedApplication::setPaintingSuppressed(bool f)
	{
	m->is_painting_suppressed = f;
	}

	void AbstractCharacterBasedApplication::commitLine(std::vector<uint32_t> const &vec)
	{
	if (isReadOnly()) return;

	QByteArray ba;
	if (!vec.empty()){
	utf32 u32(&vec[0], vec.size());
	u32.to_utf8([&](char c, int pos){
	(void)pos;
	ba.push_back(c);
	return true;
	});
	}
	if (m->parsed_row_index == 0 && engine()->document.lines.empty()) {
	Document::Line newline;
	engine()->document.lines.push_back(newline);
	}
	Document::Line *line = &engine()->document.lines[m->parsed_row_index];
	if (m->parsed_row_index == 0) {
	line->byte_offset = 0;
	line->line_number = (line->type == Document::Line::Unknown) ? 0 : 1;
	}
	line->text = ba;

	if (m->valid_line_index > m->parsed_row_index) {
	m->valid_line_index = m->parsed_row_index;
	}

	int y = m->parsed_row_index - cx()->scroll_row_pos + cx()->viewport_org_y;
	if (y >= 0 && y < (int)m->line_flags.size()) {
	m->line_flags[y] \|= LineChanged;
	}
	}

	void AbstractCharacterBasedApplication::parseLine(std::vector<uint32_t> *vec, int increase_hint, bool force)
	{
	if (force) {
	clearParsedLine();
	}

	if (force \|\| !m->parsed_for_edit) {
	fetchCurrentLine();
	m->parsed_col_index = internalParseLine(vec ? vec : &m->prepared_current_line, increase_hint);
	m->parsed_for_edit = true;
	} else {
	if (vec) {
	*vec = m->prepared_current_line;
	}
	}
	}

	QByteArray AbstractCharacterBasedApplication::parsedLine() const
	{
	return m->parsed_line;
	}

	bool AbstractCharacterBasedApplication::isCurrentLineWritable() const
	{
	if (isReadOnly()) return false;

	int row = cx()->current_row;
	if (row >= 0 && row < cx()->engine->document.lines.size()) {
	if (cx()->engine->document.lines[row].type != Document::Line::Unknown) {
	return true;
	}
	}
	return false;
	}

	int AbstractCharacterBasedApplication::editorViewportWidth() const
	{
	return cx()->viewport_width;
	}

	int AbstractCharacterBasedApplication::editorViewportHeight() const
	{
	return cx()->viewport_height;
	}

	int AbstractCharacterBasedApplication::print(int x, int y, const QString &text, const AbstractCharacterBasedApplication::Option &opt)
	{
	CharAttr attr = opt.char_attr;
	if (opt.char_attr.flags & CharAttr::Selected) {
	attr.index = CharAttr::Invert;
	}
	if (opt.char_attr.flags & CharAttr::CurrentLine) {
	attr.index = CharAttr::Hilite;
	}

	const int screen_w = screenWidth();
	const int screen_h = screenHeight();
	int x_start = 0;
	int y_start = 0;
	int x_limit = screen_w;
	int y_limit = screen_h;
	if (!opt.clip.isNull()) {
	x_start = opt.clip.x();
	y_start = opt.clip.y();
	x_limit = x_start + opt.clip.width();
	y_limit = y_start + opt.clip.height();
	}
	if (y >= y_start && y < y_limit) {
	bool changed = false;
	int x2 = x;
	int y2 = y;
	if (text.isEmpty()) {
	changed = true; // set changed flag if text is empty
	} else {
	for (int i = 0; i < text.size(); i++) {
	ushort c = text.utf16()[i];
	if (c < ' ' \|\| c == 0x7f) continue;
	int cw = charWidth(c);
	if (x2 + cw > x_limit) {
	break;
	}
	for (int j = 0; j < cw; j++) {
	if (x2 >= x_start && x2 < screen_w) {
	int o = y2 * screen_w + x2;
	CharAttr a;
	if (j == 0) {
	a = attr;
	} else {
	c = -1;
	}
	if (c != m->screen[o].c \|\| a != m->screen[o].a) {
	m->screen[o].c = c;
	m->screen[o].a = a;
	changed = true;
	}
	}
	x2++;
	}
	}
	}
	if (changed) {
	m->line_flags[y] \|= LineChanged;
	}
	x = x2;
	}
	return x;
	}

	void AbstractCharacterBasedApplication::initEngine(std::shared_ptr<TextEditorContext> cx)
	{
	cx->engine = TextEditorEnginePtr(new TextEditorEngine);
	}

	TextEditorContext *AbstractCharacterBasedApplication::cx()
	{
	if (dialog_cx) {
	if (!dialog_cx->engine) {
	initEngine(dialog_cx);
	}
	return dialog_cx.get();
	}
	if (!editor_cx->engine) {
	initEngine(editor_cx);
	}
	return editor_cx.get();
	}

	const TextEditorContext *AbstractCharacterBasedApplication::cx() const
	{
	return const_cast<AbstractCharacterBasedApplication *>(this)->cx();
	}

	TextEditorEnginePtr AbstractCharacterBasedApplication::engine()
	{
	Q_ASSERT(cx()->engine);
	return cx()->engine;
	}

	void AbstractCharacterBasedApplication::setTextEditorEngine(TextEditorEnginePtr e)
	{
	cx()->engine = e;
	}

	void AbstractCharacterBasedApplication::setDocument(QList<Document::Line> const *source)
	{
	document()->lines = *source;
	}

	void AbstractCharacterBasedApplication::openFile(const QString &path)
	{
	document()->lines.clear();
	QFile file(path);
	if (file.open(QFile::ReadOnly)) {
	size_t offset = 0;
	QString line;
	unsigned int linenum = 0;
	while (!file.atEnd()) {
	linenum++;
	Document::Line line(file.readLine());
	line.byte_offset = offset;
	line.type = Document::Line::Normal;
	line.line_number = linenum;
	document()->lines.push_back(line);
	offset += line.text.size();
	}
	int n = line.size();
	if (n > 0) {
	ushort const *p = line.utf16();
	ushort c = p[n - 1];
	if (c == '\r' \|\| c == '\n') {
	document()->lines.push_back(Document::Line(QByteArray()));
	}
	}
	m->valid_line_index = (int)document()->lines.size();
	setRecentlyUsedPath(path);
	}
	scrollToTop();
	}

	void AbstractCharacterBasedApplication::saveFile(const QString &path)
	{
	QFile file(path);
	if (file.open(QFile::WriteOnly)) {
	for (Document::Line const &line : document()->lines) {
	file.write(line.text);
	}
	}
	}

	void AbstractCharacterBasedApplication::pressEnter()
	{
	deleteIfSelected();

	if (isDialogMode()) {
	closeDialog(true);
	} else {
	writeNewLine();
	}
	}

	void AbstractCharacterBasedApplication::pressEscape()
	{
	if (isTerminalMode()) {
	m->escape_sequence.write(0x1b);
	return;
	}

	if (isDialogMode()) {
	closeDialog(false);
	return;
	}

	deselect();
	updateVisibility(false, false, false);
	}

	AbstractCharacterBasedApplication::State AbstractCharacterBasedApplication::state() const
	{
	return m->state;
	}

	Document *AbstractCharacterBasedApplication::document()
	{
	return &engine()->document;
	}

	int AbstractCharacterBasedApplication::documentLines() const
	{
	return const_cast<AbstractCharacterBasedApplication *>(this)->document()->lines.size();
	}

	bool AbstractCharacterBasedApplication::isSingleLineMode() const
	{
	return cx()->single_line;
	}

	void AbstractCharacterBasedApplication::setLineMargin(int n)
	{
	m->line_margin = n;
	}

	void AbstractCharacterBasedApplication::ensureCurrentLineVisible()
	{
	int margin = (cx()->viewport_height >= 6 && !isSingleLineMode()) ? m->line_margin : 0;
	int pos = cx()->scroll_row_pos;
	int top = cx()->current_row - margin;
	int bottom = cx()->current_row + 1 - editorViewportHeight() + margin;
	if (pos > top) pos = top;
	if (pos < bottom) pos = bottom;
	if (pos < 0) pos = 0;
	if (cx()->scroll_row_pos != pos) {
	cx()->scroll_row_pos = pos;
	invalidateArea();
	}
	}

	int AbstractCharacterBasedApplication::decideColumnScrollPos() const
	{
	int x = cx()->current_col;
	int w = editorViewportWidth() - RIGHT_MARGIN;
	if (w < 0) w = 0;
	return x > w ? (cx()->current_col - w) : 0;
	}

	int AbstractCharacterBasedApplication::calcVisualWidth(const Document::Line &line) const
	{
	QList<FormattedLine> lines = formatLine(line, cx()->tab_span);
	int x = 0;
	for (FormattedLine const &line : lines) {
	if (line.text.isEmpty()) continue;
	ushort const *ptr = line.text.utf16();
	ushort const *end = ptr + line.text.size();
	while (1) {
	int c = -1;
	if (ptr < end) {
	c = *ptr;
	ptr++;
	}
	if (c == -1 \|\| c == '\r' \|\| c == '\n') {
	break;
	}
	if (c == '\t') {
	x += cx()->tab_span;
	x -= x % cx()->tab_span;
	} else {
	x += charWidth(c);
	}
	}
	}
	return x;
	}



	void AbstractCharacterBasedApplication::clearRect(int x, int y, int w, int h)
	{
	int scr_w = screenWidth();
	int scr_h = screenHeight();
	int y0 = y;
	int y1 = y + h;
	if (y0 < 0) y0 = 0;
	if (y1 > scr_h) y1 = scr_h;
	int x0 = x;
	int x1 = x + w;
	if (x0 < 0) x0 = 0;
	if (x1 > scr_w) x1 = scr_w;
	for (int y = y0; y < y1; y++) {
	for (int x = x0; x < x1; x++) {
	int o = y * scr_w + x;
	m->screen[o] = Character();
	}
	}
	}

	int AbstractCharacterBasedApplication::calcIndexToColumn(const std::vector<uint32_t> &vec, int index) const
	{
	int col = 0;
	for (int i = 0; i < index; i++) {
	uint32_t c = vec.at(i);
	if (c == '\t') {
	col += cx()->tab_span;
	col -= col % cx()->tab_span;
	} else {
	col += charWidth(c);
	}
	}
	return col;
	}

	void AbstractCharacterBasedApplication::savePos()
	{
	TextEditorContext *p = editor_cx.get();
	if (p) {
	p->saved_row = p->current_row;
	p->saved_col = p->current_col;
	p->saved_col_hint = p->current_col_hint;
	}
	}

	void AbstractCharacterBasedApplication::restorePos()
	{
	TextEditorContext *p = editor_cx.get();
	if (p) {
	p->current_row = p->saved_row;
	p->current_col = p->saved_col;
	p->current_col_hint = p->saved_col_hint;
	}
	}

	void AbstractCharacterBasedApplication::setCursorRow(int row, bool auto_scroll)
	{
	if (cx()->current_row == row) return;

	if (isShiftModifierPressed()) {
	if (selection_anchor_0.enabled == SelectionAnchor::No) {
	setSelectionAnchor(SelectionAnchor::EnabledEasy, true, auto_scroll);
	selection_anchor_1 = selection_anchor_0;
	}
	} else if (selection_anchor_0.enabled == SelectionAnchor::EnabledEasy) {
	setSelectionAnchor(SelectionAnchor::No, false, auto_scroll);
	}

	cx()->current_row = row;

	if (selection_anchor_0.enabled != SelectionAnchor::No) {
	setSelectionAnchor(selection_anchor_0.enabled, true, auto_scroll);
	}
	}

	void AbstractCharacterBasedApplication::setCursorCol(int col, bool auto_scroll)
	{
	if (cx()->current_col == col) {
	cx()->current_col_hint = col;
	return;
	}

	if (isShiftModifierPressed()) {
	if (selection_anchor_0.enabled == SelectionAnchor::No) {
	setSelectionAnchor(SelectionAnchor::EnabledEasy, true, auto_scroll);
	selection_anchor_1 = selection_anchor_0;
	}
	} else if (selection_anchor_0.enabled == SelectionAnchor::EnabledEasy) {
	setSelectionAnchor(SelectionAnchor::No, false, auto_scroll);
	}

	cx()->current_col = col;
	cx()->current_col_hint = col;

	if (selection_anchor_0.enabled != SelectionAnchor::No) {
	setSelectionAnchor(selection_anchor_0.enabled, true, auto_scroll);
	}
	}

	void AbstractCharacterBasedApplication::setCursorPos(int row, int col)
	{
	setCursorRow(row, false);
	setCursorCol(col, false);
	}

	void AbstractCharacterBasedApplication::setCursorColByIndex(std::vector<uint32_t> const &vec, int col_index)
	{
	int col = calcIndexToColumn(vec, col_index);
	setCursorCol(col);
	}

	int AbstractCharacterBasedApplication::nextTabStop(int x) const
	{
	x += cx()->tab_span;
	x -= x % cx()->tab_span;
	return x;
	}

	void AbstractCharacterBasedApplication::editSelected(EditOperation op, std::vector<uint32_t> *cutbuffer)
	{
	if (isReadOnly() && op == EditOperation::Cut) {
	op = EditOperation::Copy;
	}

	SelectionAnchor a = selection_anchor_0;
	SelectionAnchor b = selection_anchor_1;
	if (!a.enabled) return;
	if (!b.enabled) return;
	if (a == b) return;

	auto UpdateVisibility = [&](){
	updateVisibility(false, false, false);
	};

	if (cutbuffer) {
	cutbuffer->clear();
	}
	std::list<std::vector<uint32_t>> cutlist;

	if (a.row > b.row) {
	std::swap(a, b);
	} else if (a.row == b.row) {
	if (a.col > b.col) {
	std::swap(a, b);
	}
	}

	int curr_row = cx()->current_row;
	int curr_col = cx()->current_col;

	cx()->current_row = b.row;
	cx()->current_col = b.col;

	if (a.row == b.row) {
	std::vector<uint32_t> vec1;
	parseLine(&vec1, 0, true);
	auto begin = vec1.begin() + calcColumnToIndex(a.col);
	auto end = vec1.begin() + calcColumnToIndex(b.col);
	if (cutbuffer) {
	std::vector<uint32_t> cut;
	cut.insert(cut.end(), begin, end);
	cutlist.push_back(std::move(cut));
	}
	if (op == EditOperation::Cut) {
	vec1.erase(begin, end);
	commitLine(vec1);
	UpdateVisibility();
	}
	} else {
	std::vector<uint32_t> vec1;
	parseLine(&vec1, 0, true);
	{
	auto begin = vec1.begin();
	auto end = vec1.begin() + calcColumnToIndex(b.col);
	if (cutbuffer) {
	std::vector<uint32_t> cut;
	cut.insert(cut.end(), begin, end);
	cutlist.push_back(std::move(cut));
	}
	if (op == EditOperation::Cut) {
	vec1.erase(begin, end);
	commitLine(vec1);
	UpdateVisibility();
	}
	}
	int n = b.row - a.row;
	for (int i = 0; i < n; i++) {
	QList<Document::Line> *lines = &cx()->engine->document.lines;
	if (cutbuffer && i > 0) {
	cx()->current_row = b.row - i;
	cx()->current_col = 0;
	std::vector<uint32_t> cut;
	parseLine(&cut, 0, true);
	cutlist.push_back(std::move(cut));
	}
	if (op == EditOperation::Cut) {
	lines->erase(lines->begin() + b.row - i);
	}
	}

	cx()->current_row = a.row;
	cx()->current_col = a.col;
	int index = calcColumnToIndex(a.col);
	std::vector<uint32_t> vec2;
	parseLine(&vec2, 0, true);
	if (cutbuffer) {
	std::vector<uint32_t> cut;
	cut.insert(cut.end(), vec2.begin() + index, vec2.end());
	cutlist.push_back(std::move(cut));
	}

	if (op == EditOperation::Cut) {
	vec2.resize(index);
	vec2.insert(vec2.end(), vec1.begin(), vec1.end());
	commitLine(vec2);
	UpdateVisibility();
	}
	}

	if (cutbuffer) {
	size_t size = 0;
	for (std::vector<uint32_t> const &v : cutlist) {
	size += v.size();
	}
	cutbuffer->reserve(size);
	for (auto it = cutlist.rbegin(); it != cutlist.rend(); it++) {
	std::vector<uint32_t> const &v = *it;
	cutbuffer->insert(cutbuffer->end(), v.begin(), v.end());
	}
	}


	if (op == EditOperation::Cut) {
	deselect();
	setCursorPos(a.row, a.col);
	invalidateArea(a.row - cx()->scroll_row_pos);
	} else {
	cx()->current_row = curr_row;
	cx()->current_col = curr_col;
	invalidateArea(curr_row - cx()->scroll_row_pos);
	}

	clearParsedLine();
	UpdateVisibility();
	}

	void AbstractCharacterBasedApplication::edit_(EditOperation op)
	{
	std::vector<uint32_t> u32buf;
	editSelected(op, &u32buf);
	if (u32buf.empty()) return;

	std::vector<ushort> u16buf;
	u16buf.reserve(1024);
	utf32(&u32buf[0], u32buf.size()).to_utf16([&](uint16_t c){
	u16buf.push_back(c);
	return true;
	});
	if (!u16buf.empty()) {
	QString s = QString::fromUtf16(&u16buf[0], u16buf.size());
	qApp->clipboard()->setText(s);
	}
	}

	bool AbstractCharacterBasedApplication::deleteIfSelected()
	{
	if (selection_anchor_0.enabled && selection_anchor_1.enabled) {
	if (selection_anchor_0 != selection_anchor_1) {
	editSelected(EditOperation::Cut, nullptr);
	return true;
	}
	}
	return false;
	}

	void AbstractCharacterBasedApplication::doDelete()
	{
	if (isReadOnly()) return;
	if (isTerminalMode()) return;

	if (deleteIfSelected()) {
	return;
	}

	parseLine(nullptr, 0, false);
	std::vector<uint32_t> *vec = &m->prepared_current_line;
	int index = m->parsed_col_index;
	int c = -1;
	if (index >= 0 && index < (int)vec->size()) {
	c = (*vec)[index];
	}
	if (c == '\n' \|\| c == '\r' \|\| c == -1) {
	if (index == 0) {
	m->parsed_row_index--;
	}
	invalidateAreaBelowTheCurrentLine();
	if (isSingleLineMode()) {
	// nop
	} else {
	if (c != -1) {
	vec->erase(vec->begin() + index);
	if (c == '\r' && index < (int)vec->size() && (*vec)[index] == '\n') {
	vec->erase(vec->begin() + index);
	}
	}
	if (vec->empty()) {
	clearParsedLine();
	if (cx()->current_row + 1 < (int)cx()->engine->document.lines.size()) {
	cx()->engine->document.lines.erase(cx()->engine->document.lines.begin() + cx()->current_row);
	}
	} else {
	commitLine(*vec);
	setCursorColByIndex(*vec, index);
	if (index == (int)vec->size()) {
	int nextrow = cx()->current_row + 1;
	int lines = documentLines();
	if (nextrow < lines) {
	Document::Line *ba1 = &cx()->engine->document.lines[cx()->current_row];
	Document::Line const &ba2 = cx()->engine->document.lines[nextrow];
	ba1->text.append(ba2.text);
	cx()->engine->document.lines.erase(cx()->engine->document.lines.begin() + nextrow);
	}
	}
	}
	clearParsedLine();
	updateVisibility(true, true, true);
	}
	} else {
	vec->erase(vec->begin() + index);
	commitLine(*vec);
	setCursorColByIndex(*vec, index);
	updateVisibility(true, true, true);
	}
	}

	void AbstractCharacterBasedApplication::doBackspace()
	{
	if (isReadOnly()) return;
	if (isTerminalMode()) return;

	if (deleteIfSelected()) {
	return ;
	}

	if (cx()->current_row > 0 \|\| cx()->current_col > 0) {
	setPaintingSuppressed(true);
	moveCursorLeft();
	doDelete();
	setPaintingSuppressed(false);
	updateVisibility(true, true, true);
	}
	}

	bool AbstractCharacterBasedApplication::isDialogMode()
	{
	return m->dialog_mode;
	}

	void AbstractCharacterBasedApplication::setDialogOption(QString const &title, QString value, DialogHandler handler)
	{
	m->dialog_title = title;
	m->dialog_value = value;
	m->dialog_handler = handler;
	}

	void AbstractCharacterBasedApplication::setDialogMode(bool f)
	{
	if (f) {
	if (!dialog_cx) {
	int y = screenHeight() - 2;
	dialog_cx = std::shared_ptr<TextEditorContext>(new TextEditorContext);
	dialog_cx->engine = std::shared_ptr<TextEditorEngine>(new TextEditorEngine);
	dialog_cx->single_line = true;
	dialog_cx->viewport_org_x = 0;
	dialog_cx->viewport_org_y = y + 1;
	dialog_cx->viewport_width = screenWidth();
	dialog_cx->viewport_height = 1;
	}
	dialog_cx->engine->document.lines.push_back(Document::Line(m->dialog_value.toUtf8()));
	editor_cx->viewport_height = screenHeight() - m->header_line - 2;
	m->dialog_mode = true;
	clearParsedLine();
	moveCursorEnd();
	} else {
	dialog_cx.reset();
	m->dialog_mode = false;
	layoutEditor();
	clearParsedLine();
	updateVisibility(true, true, true);
	}
	}

	void AbstractCharacterBasedApplication::execDialog(QString const &dialog_title, QString dialog_value, DialogHandler handler)
	{
	setDialogOption(dialog_title, dialog_value, handler);
	setDialogMode(true);
	}

	void AbstractCharacterBasedApplication::closeDialog(bool result)
	{
	if (isDialogMode()) {
	deselect();
	QString line;
	if (!dialog_cx->engine->document.lines.empty()) {
	Document::Line const &l = dialog_cx->engine->document.lines.front();
	line = QString::fromUtf8(l.text);
	}
	setDialogMode(false);
	if (m->dialog_handler) {
	m->dialog_handler(result, line);
	}
	return;
	}
	}

	int AbstractCharacterBasedApplication::internalParseLine(std::vector<uint32_t> *vec, int increase_hint) const
	{
	vec->clear();

	int index = -1;
	int col = 0;
	int len = m->parsed_line.size();
	if (len > 0) {
	vec->reserve(len + increase_hint);
	char const *src = m->parsed_line.data();
	utf8 u8(src, len);
	while (1) {
	int n = 0;
	uint32_t c = u8.next();
	if (c == 0) {
	n = 1;
	} else {
	if (c == '\t') {
	int z = nextTabStop(col);
	n = z - col;
	} else {
	n = charWidth(c);
	}
	}
	if (col <= cx()->current_col && col + n > cx()->current_col) {
	index = (int)vec->size();
	}
	if (c == 0) break;
	col += n;
	vec->push_back(c);
	}
	}
	return index;
	}

	int AbstractCharacterBasedApplication::calcColumnToIndex(int column)
	{
	int index = 0;
	if (column > 0) {
	fetchCurrentLine();
	int col = 0;
	int len = m->parsed_line.size();
	if (len > 0) {
	char const *src = m->parsed_line.data();
	utf8 u8(src, len);
	while (1) {
	uint32_t c = u8.next();
	int n = 0;
	if (c == '\r' \|\| c == '\n' \|\| c == 0) {
	break;
	}
	if (c == '\t') {
	int z = nextTabStop(col);
	n = z - col;
	} else {
	n = charWidth(c);
	}
	col += n;
	index++;
	if (col >= column) {
	break;
	}
	}
	}
	}
	return index;
	}

	void AbstractCharacterBasedApplication::invalidateArea(int top_y)
	{
	int y0 = cx()->viewport_org_y;
	int y1 = cx()->viewport_height + y0;
	top_y += y0;
	if (y0 < top_y) y0 = top_y;
	int n = m->line_flags.size();
	if (y0 < 0) y0 = 0;
	if (y1 > n) y1 = n;
	for (int y = y0; y < y1; y++) {
	m->line_flags[y] \|= LineChanged;
	}
	}

	void AbstractCharacterBasedApplication::invalidateAreaBelowTheCurrentLine()
	{
	int y;

	y = m->parsed_row_index;
	if (m->valid_line_index > y) {
	m->valid_line_index = y;
	}

	y = m->parsed_row_index - cx()->scroll_row_pos;
	invalidateArea(y);
	}

	int AbstractCharacterBasedApplication::scrollBottomLimit() const
	{
	return documentLines() - editorViewportHeight() / 2;
	}

	void AbstractCharacterBasedApplication::writeCR()
	{
	deleteIfSelected();

	setCursorCol(0);
	clearParsedLine();
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::moveCursorOut()
	{
	setCursorRow(-1);
	}

	void AbstractCharacterBasedApplication::moveCursorHome()
	{
	fetchCurrentLine();
	QString line = m->parsed_line;
	ushort const *ptr = line.utf16();
	ushort const *end = ptr + line.size();
	int x = 0;
	while (1) {
	int c = -1;
	if (ptr < end) {
	c = *ptr;
	ptr++;
	}
	if (c == ' ') {
	x++;
	} else if (c == '\t') {
	x = nextTabStop(x);
	} else {
	break;
	}
	}
	if (x == cx()->current_col) {
	x = 0;
	}
	setCursorCol(x);
	clearParsedLine();
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::moveCursorEnd()
	{
	fetchCurrentLine();
	QByteArray line = m->parsed_line;
	int col = calcVisualWidth(Document::Line(line));
	setCursorCol(col);
	clearParsedLine();
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::scrollUp()
	{
	if (cx()->scroll_row_pos > 0) {
	cx()->scroll_row_pos--;
	invalidateArea();
	clearParsedLine();
	updateVisibility(false, false, true);
	}
	}

	void AbstractCharacterBasedApplication::scrollDown()
	{
	int limit = scrollBottomLimit();
	if (cx()->scroll_row_pos < limit) {
	cx()->scroll_row_pos++;
	invalidateArea();
	clearParsedLine();
	updateVisibility(false, false, true);
	}
	}

	void AbstractCharacterBasedApplication::moveCursorUp()
	{
	if (isSingleLineMode()) {
	// nop
	} else if (cx()->current_row > 0) {
	setCursorRow(cx()->current_row - 1);
	clearParsedLine();
	updateVisibility(true, false, true);
	}
	}

	void AbstractCharacterBasedApplication::moveCursorDown()
	{
	if (isSingleLineMode()) {
	// nop
	} else if (cx()->current_row + 1 < (int)document()->lines.size()) {
	setCursorRow(cx()->current_row + 1);
	clearParsedLine();
	updateVisibility(true, false, true);
	}
	}

	void AbstractCharacterBasedApplication::scrollToTop()
	{
	if (isSingleLineMode()) return;

	setCursorRow(0);
	setCursorCol(0);
	cx()->scroll_row_pos = 0;
	invalidateArea();
	clearParsedLine();
	updateVisibility(true, false, true);
	}

	void AbstractCharacterBasedApplication::moveCursorLeft()
	{
	if (!isShiftModifierPressed() && selection_anchor_0.enabled && selection_anchor_1.enabled) { // 選択領域があったら
	if (selection_anchor_0 != selection_anchor_1) {
	SelectionAnchor a = std::min(selection_anchor_0, selection_anchor_1);
	deselect();
	setCursorRow(a.row);
	setCursorCol(a.col);
	updateVisibility(true, true, true);
	return;
	}
	}

	if (cx()->current_col == 0) {
	if (isSingleLineMode()) {
	// nop
	} else {
	if (cx()->current_row > 0) {
	setCursorRow(cx()->current_row - 1);
	clearParsedLine();
	moveCursorEnd();
	}
	}
	return;
	}

	int col = 0;
	int newcol = 0;
	int index;
	for (index = 0; index < (int)m->prepared_current_line.size(); index++) {
	ushort c = m->prepared_current_line[index];
	if (c == '\r' \|\| c == '\n') {
	break;
	}
	newcol = col;
	if (c == '\t') {
	col = nextTabStop(col);
	} else {
	col += charWidth(c);
	}
	if (col >= cx()->current_col) {
	break;
	}
	}
	m->parsed_col_index = index;
	setCursorCol(newcol);

	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::moveCursorRight()
	{
	if (!isShiftModifierPressed() && selection_anchor_0.enabled && selection_anchor_1.enabled) { // 選択領域があったら
	if (selection_anchor_0 != selection_anchor_1) {
	SelectionAnchor a = std::max(selection_anchor_0, selection_anchor_1);
	deselect();
	setCursorRow(a.row);
	setCursorCol(a.col);
	updateVisibility(true, true, true);
	return;
	}
	}

	int col = 0;
	int i = 0;
	while (1) {
	int c = -1;
	if (i < (int)m->prepared_current_line.size()) {
	c = m->prepared_current_line[i];
	}
	if (c == '\r' \|\| c == '\n' \|\| c == -1) {
	if (!isSingleLineMode()) {
	int nextrow = cx()->current_row + 1;
	int lines = document()->lines.size();
	if (nextrow < lines) {
	setCursorPos(nextrow, 0);
	clearParsedLine();
	updateVisibility(true, true, true);
	return;
	}
	}
	break;
	}
	if (c == '\t') {
	col = nextTabStop(col);
	} else {
	col += charWidth(c);
	}
	if (col > cx()->current_col) {
	break;
	}
	i++;
	}
	if (col != cx()->current_col) {
	setCursorCol(col);
	clearParsedLine();
	updateVisibility(true, true, true);
	}
	}

	void AbstractCharacterBasedApplication::movePageUp()
	{
	if (!isSingleLineMode()) {
	int step = editorViewportHeight();
	setCursorRow(cx()->current_row - step);
	cx()->scroll_row_pos -= step;
	if (cx()->current_row < 0) {
	cx()->current_row = 0;
	}
	if (cx()->scroll_row_pos < 0) {
	cx()->scroll_row_pos = 0;
	}
	invalidateArea();
	clearParsedLine();
	updateVisibility(true, false, true);
	}
	}

	void AbstractCharacterBasedApplication::movePageDown()
	{
	if (!isSingleLineMode()) {
	int limit = documentLines();
	if (limit > 0) {
	limit--;
	int step = editorViewportHeight();
	setCursorRow(cx()->current_row + step);
	cx()->scroll_row_pos += step;
	if (cx()->current_row > limit) {
	cx()->current_row = limit;
	}
	limit = scrollBottomLimit();
	if (cx()->scroll_row_pos > limit) {
	cx()->scroll_row_pos = limit;
	}
	} else {
	setCursorRow(0);
	cx()->scroll_row_pos = 0;
	}
	invalidateArea();
	clearParsedLine();
	updateVisibility(true, false, true);
	}
	}

	void AbstractCharacterBasedApplication::scrollRight()
	{
	if (cx()->scroll_col_pos > 0) {
	cx()->scroll_col_pos--;
	} else {
	cx()->scroll_col_pos = 0;
	}
	invalidateArea();
	clearParsedLine();
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::scrollLeft()
	{
	cx()->scroll_col_pos++;
	invalidateArea();
	clearParsedLine();
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::addNewLineToBottom()
	{
	int row = cx()->engine->document.lines.size();
	if (cx()->current_row >= row) {
	setCursorPos(row, 0);
	cx()->engine->document.lines.push_back(Document::Line(QByteArray()));
	}
	}

	void AbstractCharacterBasedApplication::appendNewLine(std::vector<uint32_t> *vec)
	{
	if (isSingleLineMode()) return;

	vec->push_back('\r');
	vec->push_back('\n');
	}

	void AbstractCharacterBasedApplication::writeNewLine()
	{
	if (isReadOnly()) return;
	if (isSingleLineMode()) return;
	if (!isCurrentLineWritable()) return;

	invalidateAreaBelowTheCurrentLine();

	std::vector<uint32_t> curr_line;
	parseLine(&curr_line, 0, false);
	int index = m->parsed_col_index;
	if (index < 0) {
	addNewLineToBottom();
	index = 0;
	}
	std::vector<uint32_t> next_line;
	// split line
	next_line.insert(next_line.end(), curr_line.begin() + index, curr_line.end());
	// shrink current line
	curr_line.resize(index);
	// append new line code
	appendNewLine(&curr_line);
	// next line index
	cx()->current_row = m->parsed_row_index + 1;
	// commit current line
	commitLine(curr_line);
	// insert next line
	m->parsed_row_index = cx()->current_row;
	engine()->document.lines.insert(engine()->document.lines.begin() + m->parsed_row_index, Document::Line(QByteArray()));
	// commit next line
	commitLine(next_line);

	setCursorColByIndex(next_line, 0);

	clearParsedLine();
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::makeColumnPosList(std::vector<int> *out)
	{
	out->clear();
	std::vector<uint32_t> const *line = &m->prepared_current_line;
	int x = 0;
	while (1) {
	size_t index = out->size();
	out->push_back(x);
	int n;
	int c = -1;
	if (index < line->size()) {
	c = line->at(index);
	}
	if (c == '\r' \|\| c == '\n' \|\| c == -1) {
	break;
	} else if (c == '\t') {
	int z = nextTabStop(x);
	n = z - x;
	} else {
	n = charWidth(c);
	}
	x += n;
	}
	}

	void AbstractCharacterBasedApplication::updateCursorPos(bool auto_scroll)
	{
	if (!cx()->engine) {
	return;
	}

	parseLine(&m->prepared_current_line, 0, false);

	int index = 0;
	int char_span = 0;
	int col = cx()->current_col_hint;

	{
	std::vector<int> pts;
	makeColumnPosList(&pts);
	if (pts.size() > 1) {
	int newcol = pts.back();
	int newindex = pts.size() - 1;
	for (size_t i = 0; i + 1 < pts.size(); i++) {
	int x = pts[i];
	if (x <= col && col < pts[i + 1]) {
	char_span = pts[i + 1] - pts[i];
	newindex = i;
	newcol = x;
	break;
	}
	}
	index = newindex;
	col = newcol;
	} else if (pts.size() > 0) {
	col = pts.back();
	} else {
	col = 0;
	}
	}

	m->parsed_col_index = index;

	cx()->current_col = col;

	if (char_span < 1) {
	char_span = 1;
	}
	cx()->current_char_span = char_span;

	if (auto_scroll) {
	int pos = decideColumnScrollPos();
	if (cx()->scroll_col_pos != pos) {
	cx()->scroll_col_pos = pos;
	invalidateArea();
	}
	}
	}

	void AbstractCharacterBasedApplication::printInvertedBar(int x, int y, char const *text, int padchar)
	{
	int w = screenWidth();
	int o = w * y;
	for (int i = 0; i < w; i++) {
	m->screen[o + i].c = 0;
	}

	AbstractCharacterBasedApplication::Option opt;
	opt.char_attr = CharAttr::Invert;
	print(x, y, text, opt);

	for (int i = 0; i < w; i++) {
	if (m->screen[o + i].c == 0) {
	m->screen[o + i].c = padchar;
	}
	m->screen[o + i].a = opt.char_attr;
	}
	}

	QString AbstractCharacterBasedApplication::statusLine() const
	{
	QString text = "[%1:%2]";
	text = text.arg(cx()->current_row + 1).arg(cx()->current_col + 1);
	return text;
	}

	int AbstractCharacterBasedApplication::printArea(TextEditorContext const cx, const SelectionAnchor sel_a, const SelectionAnchor *sel_b)
	{
	int end_of_line_y = -1;
	if (cx) {
	int height = cx->viewport_height;
	QRect clip(cx->viewport_org_x, cx->viewport_org_y, cx->viewport_width, height);
	int row = cx->scroll_row_pos;
	for (int i = 0; i < height; i++) {
	if (row < 0) continue;
	int y = cx->viewport_org_y + i;
	if (row < (int)cx->engine->document.lines.size()) {
	if (i < height) {
	int x = cx->viewport_org_x - cx->scroll_col_pos;
	Document::Line const &line = cx->engine->document.lines[row];
	int anchor_a = -1;
	int anchor_b = -1;
	if (sel_a && sel_a->enabled && sel_b && sel_b->enabled) {
	SelectionAnchor a = *sel_a;
	SelectionAnchor b = *sel_b;
	if (a.row > b.row) {
	std::swap(a, b);
	} else if (a.row == b.row) {
	if (a.col > b.col) {
	std::swap(a, b);
	}
	}
	if (row > a.row && row < b.row) {
	anchor_a = 0;
	} else {
	if (row == a.row) {
	anchor_a = a.col;
	}
	if (row == b.row) {
	anchor_b = b.col;
	}
	}
	}
	QList<FormattedLine> lines = formatLine(line, cx->tab_span, anchor_a, anchor_b);
	for (FormattedLine const &line : lines) {
	AbstractCharacterBasedApplication::Option opt;
	if (line.atts & FormattedLine::StyleID) {
	opt.char_attr.color = QColor(line.atts & 0xff, (line.atts >> 8) & 0xff, (line.atts >> 16) & 0xff);
	}
	opt.clip = clip;
	if (line.isSelected()) {
	opt.char_attr.flags \|= CharAttr::Selected;
	}
	x = print(x, y, line.text, opt);
	}
	int end_x = clip.x() + clip.width();
	if (x < end_x) {
	if (x < clip.left()) {
	x = clip.left();
	}
	if (x < end_x) {
	clearRect(x, y, end_x - x, 1);
	}
	}
	}
	} else {
	if (end_of_line_y < 0) {
	end_of_line_y = i;
	}
	clearRect(cx->viewport_org_x, y, cx->viewport_width, 1);
	if (y >= 0 && y < (int)m->line_flags.size()) {
	m->line_flags[y] \|= LineChanged;
	}
	}
	row++;
	}
	}
	return end_of_line_y;
	}

	void AbstractCharacterBasedApplication::paintLineNumbers(std::function<void(int, QString, Document::Line const *line)> draw)
	{
	auto Line = [&](int index)->Document::Line &{
	return editor_cx->engine->document.lines[index];
	};
	int rightpadding = 2;
	int left_margin = editor_cx->viewport_org_x;
	int num = 1;
	size_t offset = 0;
	for (int i = 0; i < editor_cx->viewport_height; i++) {
	char tmp[100];
	Q_ASSERT(left_margin < (int)sizeof(tmp));
	memset(tmp, ' ', left_margin);
	tmp[left_margin] = 0;
	int row = editor_cx->scroll_row_pos + i;
	Document::Line *line = nullptr;
	if (row < (int)editor_cx->engine->document.lines.size()) {
	if (m->valid_line_index < 0) {
	m->valid_line_index = 0;
	Document::Line *p = &Line(0);
	if (p->type != Document::Line::Unknown) {
	p->byte_offset = offset;
	p->line_number = num;
	offset += p->text.size();
	num++;
	}
	}
	line = &Line(row);
	if (row >= m->valid_line_index) {
	{
	Document::Line const &line = Line(m->valid_line_index);
	offset = line.byte_offset;
	num = line.line_number;
	}
	while (m->valid_line_index <= row) {
	Document::Line const &line = Line(m->valid_line_index);
	if (line.type != Document::Line::Unknown) {
	offset += line.text.size();
	num++;
	}
	m->valid_line_index++;
	if (m->valid_line_index < editor_cx->engine->document.lines.size()) {
	Document::Line *p = &Line(m->valid_line_index);
	p->byte_offset = offset;
	p->line_number = num;
	}
	}
	}
	if (left_margin > 1) {
	unsigned int linenum = -1;
	if (row < m->valid_line_index) {
	#if 1
	linenum = line->line_number;
	#else
	linenum = line->byte_offset;
	#endif
	}
	if (linenum != (unsigned int)-1 && line->type != Document::Line::Unknown) {
	sprintf(tmp, "%*u ", left_margin - rightpadding, linenum);
	}
	}
	}
	int y = editor_cx->viewport_org_y + i;
	draw(y, tmp, line);
	}
	}

	bool AbstractCharacterBasedApplication::isAutoLayout() const
	{
	return m->auto_layout;
	}

	void AbstractCharacterBasedApplication::preparePaintScreen()
	{
	if (m->header_line > 0) {
	char const *line = "Hello, world\xe3\x81\x82\xe3\x81\x84\xe3\x81\x86";
	printInvertedBar(0, 0, line, ' ');
	}

	if (m->show_line_number) {
	Option opt_normal;
	paintLineNumbers([&](int y, QString text, Document::Line const *line){
	(void)line;
	print(0, y, text + '\|', opt_normal);
	});
	}

	SelectionAnchor anchor_a;
	SelectionAnchor anchor_b;

	auto MakeSelectionAnchor = [&](){
	if (selection_anchor_0.enabled != SelectionAnchor::No) {
	anchor_a = selection_anchor_0;
	#if 0
	anchor_b.row = cx()->current_row;
	anchor_b.col = cx()->current_col;
	anchor_b.enabled = selection_anchor_0.enabled;
	#else
	anchor_b = selection_anchor_1;
	#endif
	}
	};

	if (isDialogMode()) {
	printArea(editor_cx.get(), &anchor_a, &anchor_b);

	std::string text = m->dialog_title.toStdString();
	text = ' ' + text + ' ';
	int y = screenHeight() - 2;
	printInvertedBar(3, y, text.c_str(), '-');

	MakeSelectionAnchor();
	printArea(dialog_cx.get(), &anchor_a, &anchor_b);
	} else {
	MakeSelectionAnchor();
	editor_cx->bottom_line_y = printArea(editor_cx.get(), &anchor_a, &anchor_b);

	if (m->footer_line > 0) {
	QString line = statusLine();
	int y = screenHeight() - 1;
	printInvertedBar(0, y, line.toStdString().c_str(), ' ');
	}
	}
	}

	void AbstractCharacterBasedApplication::onQuit()
	{
	if (!m->is_quit_enabled) return;

	if (!isDialogMode()) {
	m->state = State::Exit;
	}
	}

	void AbstractCharacterBasedApplication::onOpenFile()
	{
	if (isReadOnly()) return;
	if (!m->is_open_enabled) return;

	if (!isDialogMode()) {
	execDialog("Open File", recentlyUsedPath(), [&](bool ok, QString const &text){
	if (ok) {
	openFile(text);
	}
	});
	}
	}

	void AbstractCharacterBasedApplication::onSaveFile()
	{
	if (!m->is_save_enabled) return;

	if (!isDialogMode()) {
	execDialog("Save File", recentlyUsedPath(), [&](bool ok, QString const &text){
	if (ok) {
	saveFile(text);
	}
	});
	}
	}

	void AbstractCharacterBasedApplication::setNormalTextEditorMode(bool f)
	{
	m->is_quit_enabled = f;
	m->is_open_enabled = f;
	m->is_save_enabled = f;
	setTerminalMode(!f);
	}

	SelectionAnchor AbstractCharacterBasedApplication::currentAnchor(SelectionAnchor::Enabled enabled)
	{
	SelectionAnchor a;
	a.row = cx()->current_row;
	a.col = cx()->current_col;
	a.enabled = enabled;
	return a;
	}

	void AbstractCharacterBasedApplication::deselect()
	{
	selection_anchor_0.enabled = SelectionAnchor::No;
	selection_anchor_1.enabled = SelectionAnchor::No;
	}

	bool AbstractCharacterBasedApplication::isSelectionAnchorEnabled() const
	{
	return selection_anchor_0.enabled != SelectionAnchor::No;
	}

	void AbstractCharacterBasedApplication::setToggleSelectionAnchorEnabled(bool f)
	{
	m->is_toggle_selection_anchor_enabled = f;
	}

	void AbstractCharacterBasedApplication::setReadOnly(bool f)
	{
	m->is_read_only = f;
	}

	bool AbstractCharacterBasedApplication::isReadOnly() const
	{
	return m->is_read_only && !m->is_terminal_mode;
	}

	void AbstractCharacterBasedApplication::setSelectionAnchor(SelectionAnchor::Enabled enabled, bool update_anchor, bool auto_scroll)
	{
	if (update_anchor) {
	selection_anchor_0 = currentAnchor(enabled);
	} else {
	selection_anchor_0.enabled = enabled;
	}
	clearParsedLine();
	updateVisibility(false, false, auto_scroll);
	}

	void AbstractCharacterBasedApplication::toggleSelectionAnchor()
	{
	if (!m->is_toggle_selection_anchor_enabled) return;

	setSelectionAnchor(isSelectionAnchorEnabled() ? SelectionAnchor::No : SelectionAnchor::EnabledHard, true, true);
	selection_anchor_1 = selection_anchor_0;
	}

	void AbstractCharacterBasedApplication::editPaste()
	{
	if (isReadOnly()) return;
	if (isTerminalMode()) return;

	setPaintingSuppressed(true);

	QString str = qApp->clipboard()->text();
	utf16(str.utf16(), str.size()).to_utf32([&](uint32_t c){
	write(c, false);
	return true;
	});

	setPaintingSuppressed(false);
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::editCopy()
	{
	edit_(EditOperation::Copy);
	}

	void AbstractCharacterBasedApplication::editCut()
	{
	if (isReadOnly()) return;
	if (isTerminalMode()) return;
	edit_(EditOperation::Cut);
	}

	void AbstractCharacterBasedApplication::setWriteMode(WriteMode wm)
	{
	m->write_mode = wm;
	}

	bool AbstractCharacterBasedApplication::isInsertMode() const
	{
	return m->write_mode == WriteMode::Insert;
	}

	bool AbstractCharacterBasedApplication::isOverwriteMode() const
	{
	return m->write_mode == WriteMode::Overwrite;
	}

	void AbstractCharacterBasedApplication::setTerminalMode(bool f)
	{
	m->is_terminal_mode = f;
	if (isTerminalMode()) {
	showHeader(false);
	showFooter(false);
	showLineNumber(false, 0);
	setLineMargin(0);
	setWriteMode(WriteMode::Overwrite);
	setReadOnly(true);
	}
	layoutEditor();
	}

	bool AbstractCharacterBasedApplication::isTerminalMode() const
	{
	return m->is_terminal_mode;
	}

	bool AbstractCharacterBasedApplication::isBottom() const
	{
	if (cx()->current_row == m->parsed_row_index) {
	if (m->parsed_col_index == (int)m->prepared_current_line.size()) {
	return true;
	}
	}
	return false;
	}

	-void AbstractCharacterBasedApplication::moveToBottom()
	+void AbstractCharacterBasedApplication::moveToTop()
	{
	if (isSingleLineMode()) return;

	deselect();

	+ cx()->current_row = 0;
	+ cx()->current_col = 0;
	+ cx()->current_col_hint = 0;
	+ cx()->scroll_row_pos = 0;
	+ scrollToTop();
	+ invalidateArea();
	+ clearParsedLine();
	+ updateVisibility(true, false, true);
	+}
	+
	+void AbstractCharacterBasedApplication::logicalMoveToBottom()
	+{
	+ deselect();
	+
	cx()->current_row = documentLines();
	cx()->current_col = 0;
	if (cx()->current_row > 0) {
	cx()->current_row = cx()->current_row - 1;
	clearParsedLine();
	fetchCurrentLine();
	int col = calcVisualWidth(Document::Line(m->parsed_line));
	cx()->current_col = col;
	cx()->current_col_hint = col;
	}
	cx()->scroll_row_pos = scrollBottomLimit();
	+}
	+
	+void AbstractCharacterBasedApplication::moveToBottom()
	+{
	+ if (isSingleLineMode()) return;
	+
	+ logicalMoveToBottom();
	+
	invalidateArea();
	clearParsedLine();
	updateVisibility(true, false, true);
	}

	int AbstractCharacterBasedApplication::findSyntax(QList<Document::CharAttr_> const *list, size_t offset)
	{
	int lo = 0;
	int hi = list->size();
	while (lo + 1 < hi) {
	int mid = (lo + hi) / 2;
	Document::CharAttr_ const *a = &list->at(mid);
	if (offset == a->offset) {
	return mid;
	}
	if (offset < a->offset) {
	hi = mid;
	} else {
	lo = mid;
	}
	}
	return lo;
	}

	void AbstractCharacterBasedApplication::insertSyntax(QList<Document::CharAttr_> *list, size_t offset, Document::CharAttr_ const &a)
	{
	int i = findSyntax(list, offset);
	int n = list->size();
	if (i < n) {
	if (list->at(i).offset == offset) {
	(*list)[i] = a;
	} else {
	if (i < n) {
	if (a.offset < list->at(i).offset) {
	if (list->at(i).color == a.color) {
	(*list)[i].offset = offset;
	return;
	}
	}
	}
	if (list->at(i).color == a.color) {
	return;
	}
	if (list->at(i).offset < a.offset) {
	i++;
	}
	list->insert(list->begin() + i, a);
	while (++i < n) {
	(*list)[i].offset++;
	}
	}
	} else {
	list->push_back(a);
	}
	}

	void AbstractCharacterBasedApplication::internalWrite(const ushort begin, const ushort end)
	{
	deleteIfSelected();
	clearShiftModifier();

	if (cx()->engine->document.lines.isEmpty()) {
	Document::Line line;
	line.type = Document::Line::Normal;
	line.line_number = 1;
	cx()->engine->document.lines.push_back(line);
	}

	if (!isCurrentLineWritable()) return;

	int len = end - begin;
	parseLine(nullptr, len, false);
	int index = m->parsed_col_index;
	if (index < 0) {
	addNewLineToBottom();
	index = 0;
	}

	std::vector<uint32_t> *vec = &m->prepared_current_line;

	auto WriteChar = [&](ushort c){
	if (isInsertMode()) {
	vec->insert(vec->begin() + index, c);
	} else if (isOverwriteMode()) {
	if (index < (int)vec->size()) {
	ushort d = vec->at(index);
	if (d == '\n' \|\| d == '\r') {
	vec->insert(vec->begin() + index, c);
	} else {
	vec->at(index) = c;
	}
	} else {
	vec->push_back(c);
	}
	}
	Document::CharAttr_ a;
	a.offset = index;
	a.color = m->escape_sequence.fg_color_code();
	insertSyntax(&m->syntax_table, index, a);
	};

	ushort const *ptr = begin;
	while (ptr < end) {
	ushort c = *ptr;
	ptr++;
	if (c >= 0xd800 && c < 0xdc00) {
	if (ptr < end) {
	ushort d = *ptr;
	if (d >= 0xdc00 && d < 0xe000) {
	ptr++;
	int u = 0x10000 + (c - 0xd800) * 0x400 + (d - 0xdc00);
	WriteChar(u);
	index++;
	}
	}
	} else {
	WriteChar(c);
	index++;
	}
	}
	m->parsed_col_index = index;
	commitLine(*vec);
	setCursorColByIndex(*vec, index);
	updateVisibility(true, true, true);
	}

	void AbstractCharacterBasedApplication::pressLetterWithControl(int c)
	{
	if (c < 0 \|\| c > 0x7f) {
	return;
	}
	if (c < 0x40) {
	c += 0x40;
	}
	c = toupper(c);
	switch (c) {
	case 'A':
	toggleSelectionAnchor();
	break;
	case 'Q':
	onQuit();
	break;
	case 'O':
	onOpenFile();
	break;
	case 'S':
	onSaveFile();
	break;
	case 'X':
	editCut();
	break;
	case 'C':
	editCopy();
	break;
	case 'V':
	editPaste();
	break;
	}
	}

	void AbstractCharacterBasedApplication::write(uint32_t c, bool by_keyboard)
	{
	if (isTerminalMode()) {
	+ moveToBottom();
	if (c == 0x1b \|\| m->escape_sequence.isActive()) {
	m->escape_sequence.write(c);
	return;
	}
	}

	bool ok = !(isTerminalMode() && by_keyboard);

	if (c < 0x20) {
	if (c == 0x08) {
	if (ok) {
	doBackspace();
	}
	} else if (c == 0x09) {
	if (ok) {
	ushort u = c;
	internalWrite(&u, &u + 1);
	}
	} else if (c == 0x0a) {
	if (ok) {
	pressEnter();
	}
	} else if (c == 0x0d) {
	if (ok) {
	writeCR();
	}
	} else if (c == 0x1b) {
	pressEscape();
	} else if (c >= 1 && c <= 26) {
	pressLetterWithControl(c);
	}
	} else if (c == 0x7f) {
	if (ok) {
	doDelete();
	}
	} else if (c < 0x10000) {
	if (ok) {
	ushort u = c;
	internalWrite(&u, &u + 1);
	}
	} else if (c >= 0x10000 && c <= 0x10ffff) {
	if (ok) {
	ushort t[2];
	t[0] = (c - 0x10000) / 0x400 + 0xd800;
	t[1] = (c - 0x10000) % 0x400 + 0xdc00;
	internalWrite(t, t + 2);
	}
	} else {
	switch (c) {
	case EscapeCode::Up:
	if (ok) moveCursorUp();
	break;
	case EscapeCode::Down:
	if (ok) moveCursorDown();
	break;
	case EscapeCode::Right:
	if (ok) moveCursorRight();
	break;
	case EscapeCode::Left:
	if (ok) moveCursorLeft();
	break;
	case EscapeCode::Home:
	if (ok) moveCursorHome();
	break;
	case EscapeCode::End:
	if (ok) moveCursorEnd();
	break;
	case EscapeCode::PageUp:
	if (ok) movePageUp();
	break;
	case EscapeCode::PageDown:
	if (ok) movePageDown();
	break;
	case EscapeCode::Insert:
	clearShiftModifier();
	break;
	case EscapeCode::Delete:
	clearShiftModifier();
	if (ok) doDelete();
	break;
	}
	}
	}

	void AbstractCharacterBasedApplication::write(char const *ptr, int len, bool by_keyboard)
	{
	if (isReadOnly()) return;

	char const *begin = ptr;
	char const *end = begin + (len < 0 ? strlen(ptr) : len);
	char const *left = begin;
	char const *right = begin;
	while (1) {
	int c = -1;
	if (right < end) {
	c = *right & 0xff;
	}
	if (c == '\n' \|\| c == '\r' \|\| c < 0) {
	utf8 src(left, right);
	while (1) {
	int d = src.next();
	if (d == 0) break;
	write(d, by_keyboard);
	}
	if (c < 0) break;
	right++;
	if (c == '\r') {
	c = isInsertMode() ? '\n' : '\r';
	if (right < end && *right == '\n') {
	c = '\n';
	right++;
	}
	write(c, by_keyboard);
	} else if (c == '\n') {
	write('\n', by_keyboard);
	}
	left = right;
	} else {
	right++;
	}
	}
	}

	void AbstractCharacterBasedApplication::write(const std::string &text)
	{
	if (!text.empty()) {
	write(text.c_str(), text.size(), false);
	}
	}

	void AbstractCharacterBasedApplication::write_(const char *ptr, bool by_keyboard)
	{
	write(ptr, -1, by_keyboard);
	}

	void AbstractCharacterBasedApplication::write_(QString text, bool by_keyboard)
	{
	if (isReadOnly()) return;

	if (text.size() == 1) {
	ushort c = text.at(0).unicode();
	write(c, by_keyboard);
	return;
	}
	int len = text.size();
	if (len > 0) {
	ushort const *begin = text.utf16();
	ushort const *end = begin + len;
	ushort const *left = begin;
	ushort const *right = begin;
	while (1) {
	int c = -1;
	if (right < end) {
	c = *right;
	}
	if (c < 0x20) {
	if (left < right) {
	internalWrite(left, right);
	}
	if (c == -1) break;
	right++;
	if (c == '\n' \|\| c == '\r') {
	if (c == '\r') {
	if (right < end && *right == '\n') {
	right++;
	}
	}
	writeNewLine();
	} else {
	write(c, by_keyboard);
	}
	left = right;
	} else {
	right++;
	}
	}
	}
	}



	void AbstractCharacterBasedApplication::write(QKeyEvent *e)
	{
	setModifierKeys(e->modifiers());

	int c = e->key();
	if (c == Qt::Key_Backspace) {
	write(0x08, true);
	} else if (c == Qt::Key_Delete) {
	write(0x7f, true);
	} else if (c == Qt::Key_Up) {
	if (isControlModifierPressed()) {
	scrollUp();
	} else {
	write(EscapeCode::Up, true);
	}
	} else if (c == Qt::Key_Down) {
	if (isControlModifierPressed()) {
	scrollDown();
	} else {
	write(EscapeCode::Down, true);
	}
	} else if (c == Qt::Key_Left) {
	write(EscapeCode::Left, true);
	} else if (c == Qt::Key_Right) {
	write(EscapeCode::Right, true);
	} else if (c == Qt::Key_PageUp) {
	write(EscapeCode::PageUp, true);
	} else if (c == Qt::Key_PageDown) {
	write(EscapeCode::PageDown, true);
	} else if (c == Qt::Key_Home) {
	- write(EscapeCode::Home, true);
	+ if (isControlModifierPressed()) {
	+ moveToTop();
	+ } else {
	+ write(EscapeCode::Home, true);
	+ }
	} else if (c == Qt::Key_End) {
	- write(EscapeCode::End, true);
	+ if (isControlModifierPressed()) {
	+ moveToBottom();
	+ } else {
	+ write(EscapeCode::End, true);
	+ }
	} else if (c == Qt::Key_Return \|\| c == Qt::Key_Enter) {
	write('\n', true);
	} else if (c == Qt::Key_Escape) {
	write(0x1b, true);
	} else if (isControlModifierPressed()) {
	if (QChar(c).isLetter()) {
	c = QChar(c).toUpper().unicode();
	if (c >= 0x40 && c < 0x60) {
	write(c - 0x40, true);
	}
	}
	} else {
	QString text = e->text();
	write_(text, true);
	}
	}



	void Document::retrieveLastText(std::vector<char> *out, int maxlen) const
	{
	int remain = maxlen;
	int i = lines.size();
	while (i > 0 && remain > 0) {
	i--;
	QByteArray const &data = lines[i].text;
	int n = data.size();
	if (n > remain) {
	n = remain;
	}
	char const *p = data.data() + data.size() - n;
	out->insert(out->begin(), p, p + n);
	remain -= n;
	}
	}
	diff --git a/src/texteditor/AbstractCharacterBasedApplication.h b/src/texteditor/AbstractCharacterBasedApplication.h
	index 21d93ab..f9dd246 100644
	--- a/src/texteditor/AbstractCharacterBasedApplication.h
	+++ b/src/texteditor/AbstractCharacterBasedApplication.h
	@@ -1,421 +1,423 @@
	#ifndef ABSTRACTCHARACTERBASEDAPPLICATION_H
	#define ABSTRACTCHARACTERBASEDAPPLICATION_H

	#include <QList>
	#include <QRect>
	#include <QString>
	#include <QByteArray>
	#include <memory>
	#include <vector>
	#include <functional>
	#include <QKeyEvent>
	#include <QColor>

	namespace EscapeCode {
	enum EscapeCode {
	Up = 0x1b5b4100,
	Down = 0x1b5b4200,
	Right = 0x1b5b4300,
	Left = 0x1b5b4400,
	Home = 0x1b4f4800,
	End = 0x1b4f4600,
	Insert = 0x1b5b327e,
	Delete = 0x1b5b337e,
	PageUp = 0x1b5b357e,
	PageDown = 0x1b5b367e,
	};
	}

	class Document {
	public:
	struct CharAttr_ {
	size_t offset = 0;
	int color = -1;
	};
	struct Line {
	enum Type {
	Unknown,
	Normal,
	Add,
	Del,
	};
	int type = Unknown;
	int hunk_number = -1;
	int line_number = 0;
	size_t byte_offset = 0;
	QByteArray text;

	Line()
	{
	}

	explicit Line(QByteArray const &ba)
	: type(Normal)
	, text(ba)
	{
	}

	explicit Line(std::string const &str, Type type = Normal)
	: type(type)
	{
	text.append(str.c_str(), str.size());
	}
	};

	QList<Line> lines;
	void retrieveLastText(std::vector<char> *out, int maxlen) const;
	};

	class TextEditorEngine {
	public:
	Document document;
	TextEditorEngine()
	{
	document.lines.push_back(Document::Line(QByteArray()));
	}
	};

	struct SelectionAnchor {
	enum Enabled {
	No,
	EnabledHard,
	EnabledEasy,
	};

	Enabled enabled = No;
	int row = 0;
	int col = 0;
	int compare(SelectionAnchor const &a) const
	{
	if (enabled && a.enabled) {
	if (row < a.row) return -1;
	if (row > a.row) return 1;
	if (col < a.col) return -1;
	if (col > a.col) return 1;
	} else {
	if (a.enabled) return -1;
	if (enabled) return 1;
	}
	return 0;
	}
	bool operator == (SelectionAnchor const &a) const
	{
	return compare(a) == 0;
	}
	bool operator != (SelectionAnchor const &a) const
	{
	return compare(a) != 0;
	}
	bool operator < (SelectionAnchor const &a) const
	{
	return compare(a) < 0;
	}
	bool operator > (SelectionAnchor const &a) const
	{
	return compare(a) > 0;
	}
	bool operator <= (SelectionAnchor const &a) const
	{
	return compare(a) <= 0;
	}
	bool operator >= (SelectionAnchor const &a) const
	{
	return compare(a) >= 0;
	}
	};

	typedef std::shared_ptr<TextEditorEngine> TextEditorEnginePtr;

	struct TextEditorContext {
	QRect cursor_rect;
	bool single_line = false;
	int current_row = 0;
	int current_col = 0;
	int current_col_hint = 0;
	int saved_row = 0;
	int saved_col = 0;
	int saved_col_hint = 0;
	int current_char_span = 1;
	int scroll_row_pos = 0;
	int scroll_col_pos = 0;
	int viewport_org_x = 0;
	int viewport_org_y = 1;
	int viewport_width = 80;
	int viewport_height = 23;
	int tab_span = 4;
	int bottom_line_y = -1;
	TextEditorEnginePtr engine;
	};

	typedef std::function<void(bool, QString const &text)> DialogHandler;

	class AbstractCharacterBasedApplication {
	public:
	static const int LEFT_MARGIN = 8;
	static const int RIGHT_MARGIN = 10;

	enum class WriteMode {
	Insert,
	Overwrite,
	};

	enum class State {
	Normal,
	Exit,
	};

	struct CharAttr {
	uint16_t index;
	uint16_t flags = 0;
	QColor color;
	CharAttr(int index = Normal)
	: index(index)
	{
	}
	bool operator == (CharAttr const &r) const
	{
	return index == r.index && color == r.color;
	}
	bool operator != (CharAttr const &r) const
	{
	return !operator == (r);
	}
	enum Index {
	Normal,
	Invert,
	Hilite,
	};
	enum Flag {
	Selected = 0x0001,
	CurrentLine = 0x0002,
	};
	};

	struct Option {
	CharAttr char_attr;
	QRect clip;
	};

	struct Character {
	uint16_t c = 0;
	CharAttr a;
	};

	enum LineFlag {
	LineChanged = 1,
	};

	static int charWidth(uint32_t c);

	class FormattedLine {
	public:
	QString text;
	enum Attr {
	StyleID = 0x00ffffff,
	Selected = 0x01000000,
	};
	uint32_t atts;
	FormattedLine(QString const &text, int atts)
	: text(text)
	, atts(atts)
	{
	}
	bool isSelected() const
	{
	return atts & Selected;
	}
	};

	QList<FormattedLine> formatLine(const Document::Line &line, int tab_span, int anchor_a = -1, int anchor_b = -1) const;
	private:
	struct Private;
	Private *m;
	protected:
	SelectionAnchor selection_anchor_0;
	SelectionAnchor selection_anchor_1;
	protected:

	std::vector<Character> *screen();
	std::vector<Character> const *screen() const;
	std::vector<uint8_t> *line_flags();

	void initEditor();

	void fetchCurrentLine() const;
	void clearParsedLine();

	int cursorX() const;
	int cursorY() const;

	int editorViewportWidth() const;
	int editorViewportHeight() const;

	virtual int print(int x, int y, QString const &text, Option const &opt);

	std::shared_ptr<TextEditorContext> editor_cx;
	std::shared_ptr<TextEditorContext> dialog_cx;

	TextEditorContext *cx();
	TextEditorContext const *cx() const;

	Document *document();
	int documentLines() const;

	bool isSingleLineMode() const;

	void ensureCurrentLineVisible();
	int decideColumnScrollPos() const;

	int calcVisualWidth(Document::Line const &line) const;

	int leftMargin_() const;

	void makeBuffer();
	int printArea(const TextEditorContext cx, SelectionAnchor const sel_a = nullptr, SelectionAnchor const *sel_b = nullptr);

	int calcIndexToColumn(const std::vector<uint32_t> &vec, int index) const;

	virtual void updateVisibility(bool ensure_current_line_visible, bool change_col, bool auto_scroll) = 0;
	void commitLine(const std::vector<uint32_t> &vec);

	void doDelete();
	void doBackspace();

	bool isDialogMode();
	void setDialogMode(bool f);
	void closeDialog(bool result);
	void setDialogOption(const QString &title, QString value, DialogHandler handler);
	void execDialog(const QString &dialog_title, QString dialog_value, DialogHandler handler);
	void toggleSelectionAnchor();
	private:
	int internalParseLine(std::vector<uint32_t> *vec, int increase_hint) const;
	void internalWrite(const ushort begin, const ushort end);
	void pressLetterWithControl(int c);
	void invalidateAreaBelowTheCurrentLine();
	void onQuit();
	void onOpenFile();
	void onSaveFile();
	void printInvertedBar(int x, int y, const char *text, int padchar);
	SelectionAnchor currentAnchor(SelectionAnchor::Enabled enabled);
	enum class EditOperation {
	Cut,
	Copy,
	};
	void editSelected(EditOperation op, std::vector<uint32_t> *cutbuffer);
	void deselect();
	int calcColumnToIndex(int column);
	void edit_(EditOperation op);
	bool isCurrentLineWritable() const;
	void initEngine(std::shared_ptr<TextEditorContext> cx);
	void writeCR();
	bool deleteIfSelected();
	static int findSyntax(const QList<Document::CharAttr_> *list, size_t offset);
	static void insertSyntax(QList<Document::CharAttr_> *list, size_t offset, const Document::CharAttr_ &a);
	protected:

	void parseLine(std::vector<uint32_t> *vec, int increase_hint, bool force);
	QByteArray parsedLine() const;
	void setCursorRow(int row, bool auto_scroll = true);
	void setCursorCol(int col, bool auto_scroll = true);
	void setCursorPos(int row, int col);
	void setCursorColByIndex(const std::vector<uint32_t> &vec, int col_index);
	int nextTabStop(int x) const;
	int scrollBottomLimit() const;
	bool isPaintingSuppressed() const;
	void setPaintingSuppressed(bool f);
	void scrollRight();
	void scrollLeft();

	void addNewLineToBottom();
	void appendNewLine(std::vector<uint32_t> *vec);
	void writeNewLine();
	void updateCursorPos(bool auto_scroll);

	QString statusLine() const;

	void preparePaintScreen();
	void setRecentlyUsedPath(const QString &path);
	QString recentlyUsedPath();
	void clearRect(int x, int y, int w, int h);
	void paintLineNumbers(std::function<void(int, QString, const Document::Line *)> draw);
	bool isAutoLayout() const;
	void invalidateArea(int top_y = 0);
	void savePos();
	void restorePos();
	public:
	virtual void layoutEditor();
	void scrollUp();
	void scrollDown();
	void moveCursorOut();
	void moveCursorHome();
	void moveCursorEnd();
	void moveCursorUp();
	void moveCursorDown();
	void moveCursorLeft();
	void moveCursorRight();
	void movePageUp();
	void movePageDown();
	void scrollToTop();

	AbstractCharacterBasedApplication();
	virtual ~AbstractCharacterBasedApplication();
	TextEditorEnginePtr engine();
	int screenWidth() const;
	int screenHeight() const;
	void setScreenSize(int w, int h, bool update_layout);
	void setTextEditorEngine(TextEditorEnginePtr e);
	void openFile(const QString &path);
	void saveFile(const QString &path);
	void loadExampleFile();
	void pressEnter();
	void pressEscape();
	State state() const;
	bool isLineNumberVisible() const;
	void showLineNumber(bool show, int left_margin = LEFT_MARGIN);
	void showHeader(bool f);
	void showFooter(bool f);
	void setAutoLayout(bool f);
	void setDocument(const QList<Document::Line> *source);
	void setSelectionAnchor(SelectionAnchor::Enabled enabled, bool update_anchor, bool auto_scroll);
	bool isSelectionAnchorEnabled() const;
	void setNormalTextEditorMode(bool f);
	void setToggleSelectionAnchorEnabled(bool f);
	void setReadOnly(bool f);
	bool isReadOnly() const;
	void editPaste();
	void editCopy();
	void editCut();
	void setWriteMode(WriteMode wm);
	bool isInsertMode() const;
	bool isOverwriteMode() const;
	void setTerminalMode(bool f);
	bool isTerminalMode() const;
	+ void moveToTop();
	void moveToBottom();
	bool isBottom() const;
	void setLineMargin(int n);
	void write(uint32_t c, bool by_keyboard);
	void write(const char *ptr, int len, bool by_keyboard);
	void write(std::string const &text);
	void write(QKeyEvent *e);
	void setTextCodec(QTextCodec *codec);
	void setCursorVisible(bool show);
	bool isCursorVisible();
	void setModifierKeys(Qt::KeyboardModifiers keymod);
	bool isControlModifierPressed() const;
	bool isShiftModifierPressed() const;
	void clearShiftModifier();
	void retrieveLastText(std::vector<char> *out, int maxlen) const;
	bool isChanged() const;
	void setChanged(bool f);
	+ void logicalMoveToBottom();
	protected:
	void write_(const char *ptr, bool by_keyboard);
	void write_(QString text, bool by_keyboard);
	void makeColumnPosList(std::vector<int> *out);
	};

	class AbstractTextEditorApplication : public AbstractCharacterBasedApplication {

	};


	#endif // ABSTRACTCHARACTERBASEDAPPLICATION_H

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