GUITextArea.h
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GUITextArea.h
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	/*
	* Copyright (C) 2011-2012 Me and My Shadow
	*
	* This file is part of Me and My Shadow.
	*
	* Me and My Shadow is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* Me and My Shadow is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with Me and My Shadow. If not, see <http://www.gnu.org/licenses/>.
	*/

	#ifndef GUITEXTAREA_H
	#define GUITEXTAREA_H

	#include "GUIObject.h"
	#include "GUIScrollBar.h"

	class WordWrapper;

	//Widget for multiline text input.
	class GUITextArea:public GUIObject{
	private:
	//Method that will remove the last character of the text.
	void backspaceChar(SDL_Renderer &renderer);
	void deleteChar(SDL_Renderer &renderer);

	//Methods to move the carrot by one character/line.
	void moveCarrotLeft();
	void moveCarrotRight();
	void moveCarrotUp();
	void moveCarrotDown();

	// Remove all highlighted text.
	void removeHighlight(SDL_Renderer &renderer);

	// Input new text.
	void inputText(SDL_Renderer &renderer, const char* s);

	//Method to adjust view so carrot stays visible.
	void adjustView();

	//Pointer to the font used in the widget.
	TTF_Font* widgetFont;

	//Widget's text.
	//One line per vector element.
	std::vector<std::string> lines;

	//Cache for rendered lines.
	//Will be updated alongside with variable text.
	std::vector<TexturePtr> linesCache;

	//Variable for carrot position.
	int highlightLineStart;
	int highlightLineEnd;
	int highlightStart;
	int highlightStartX;
	int highlightEnd;
	int highlightEndX;

	//Height of the font.
	int fontHeight;

	//Scrollbar widget.
	GUIScrollBar* scrollBar;
	GUIScrollBar* scrollBarH;

	//A struct to save hyperlink.
	struct Hyperlink {
	int startX, endX;
	std::string url;
	};

	//Hyperlinks.
	std::vector<std::vector<Hyperlink> > hyperlinks;

	void drawHighlight(SDL_Renderer& renderer, int x, int y, SDL_Rect r, SDL_Color color);

	public:
	//Another struct to save hyperlink.
	struct Hyperlink2 {
	int line, startX, endX;
	std::string url;
	};

	//Constructor.
	//left: The relative x location of the GUITextArea.
	//top: The relative y location of the GUITextArea.
	//witdh: The width of the GUITextArea.
	//height: The height of the GUITextArea.
	//enabled: Boolean if the GUITextArea is enabled or not.
	//visible: Boolean if the GUITextArea is visisble or not.
	GUITextArea(ImageManager& imageManager, SDL_Renderer& renderer,int left=0,int top=0,int width=0,int height=0,bool enabled=true,bool visible=true);

	//Method used to change the font.
	//font: Pointer to the font
	void setFont(TTF_Font* font);

	//Method used to reposition scrollbars after a resize.
	void onResize() override;

	//Method used to get widget's text in a single string.
	std::string getString();

	//Method used to set widget's text.
	//NOTE: wordWrap will actually change the text saved in the text area!
	void setString(SDL_Renderer& renderer, const std::string& input, bool wordWrap = false);
	void setStringArray(SDL_Renderer &renderer, const std::vector<std::string>& input, bool wordWrap = false);
	void setString(SDL_Renderer& renderer, const std::string& input, WordWrapper& wrapper);
	void setStringArray(SDL_Renderer &renderer, const std::vector<std::string>& input, WordWrapper& wrapper);
	void setStringArray(SDL_Renderer &renderer, std::vector<SurfacePtr>& surfaces);

	//Extract hyperlinks from text.
	//Currently only http and https links are extracted.
	void extractHyperlinks();

	//Set hyperlinks from a list.
	void setHyperlinks(const std::vector<Hyperlink2>& links);

	//Add hyperlinks from a list.
	void addHyperlinks(const std::vector<Hyperlink2>& links);

	//Bool if user can edit text in the widget.
	bool editable;

	//Method used to handle mouse and/or key events.
	//x: The x mouse location.
	//y: The y mouse location.
	//enabled: Boolean if the parent is enabled or not.
	//visible: Boolean if the parent is visible or not.
	//processed: Boolean if the event has been processed (by the parent) or not.
	//Returns: Boolean if the event is processed by the child.
	virtual bool handleEvents(SDL_Renderer&renderer, int x=0, int y=0, bool enabled=true, bool visible=true, bool processed=false);
	//Method that will render the GUITextArea.
	//x: The x location to draw the GUITextArea. (x+left)
	//y: The y location to draw the GUITextArea. (y+top)
	virtual void render(SDL_Renderer &renderer, int x=0, int y=0, bool draw=true);

	//Scroll the scrollbar.
	//dx: horizontal scroll (in pixels), typically multiple of 20
	//dy: vertical scroll (in lines)
	void scrollScrollbar(int dx, int dy);

	//The URL of clicked hyperlink.
	//This only makes sense when you received a GUIEventClick event.
	//NOTE: the widgets will process URL begins with http:// or https:// (NOTE: case sensitive) automatically
	//and you will not receive the event in these cases.
	std::string clickedHyperlink;
	};

	#endif

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