InputManager.cpp
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InputManager.cpp
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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/>.
	*/

	#include "InputManager.h"
	#include "Globals.h"
	#include "Settings.h"
	#include "Functions.h"
	#include "GUIObject.h"
	#include "GUIListBox.h"
	#include "GUIOverlay.h"
	#include <stdlib.h>
	#include <stdio.h>
	#include <string>
	using namespace std;

	InputManager inputMgr;

	//the order must be the same as InputManagerKeys
	static const char* keySettingNames[INPUTMGR_MAX]={
	"key_up","key_down","key_left","key_right","key_jump","key_action","key_space","key_cancelRecording",
	"key_escape","key_restart","key_tab","key_save","key_load","key_swap",
	"key_teleport","key_suicide","key_shift","key_next","key_previous","key_select"
	};

	//the order must be the same as InputManagerKeys
	static const char* keySettingDescription[INPUTMGR_MAX]={
	__("Up (in menu)"),__("Down (in menu)"),__("Left"),__("Right"),__("Jump"),__("Action"),__("Space (Record)"),__("Cancel recording"),
	__("Escape"),__("Restart"),__("Tab (View shadow/Level prop.)"),__("Save game (in editor)"),__("Load game"),__("Swap (in editor)"),
	__("Teleport (in editor)"),__("Suicide (in editor)"),__("Shift (in editor)"),__("Next block type (in Editor)"),
	__("Previous block type (in editor)"), __("Select (in menu)")
	};

	//A class that handles the gui events of the inputDialog.
	class InputDialogHandler:public GUIEventCallback{
	private:
	//the list box which contains keys.
	GUIListBox* listBox;
	//the parent object.
	InputManager* parent;

	//update specified key config item
	void updateConfigItem(SDL_Renderer& renderer,int index){
	//Get the description of the key.
	std::string s=_(keySettingDescription[index]);
	s+=": ";

	//Get the key code name.
	int keyCode=parent->getKeyCode((InputManagerKeys)index,false);
	s+=_(InputManager::getKeyCodeName(keyCode));

	//Add the alternative key if there is one.
	int keyCodeAlt=parent->getKeyCode((InputManagerKeys)index,true);
	if(keyCodeAlt!=0){
	s+=" ";
	s+=_("OR");
	s+=" ";
	s+=_(InputManager::getKeyCodeName(keyCodeAlt));
	}

	//Update item.
	listBox->updateItem(renderer, index,s);
	}
	public:
	//Constructor.
	InputDialogHandler(SDL_Renderer& renderer,GUIListBox* listBox,InputManager* parent):listBox(listBox),parent(parent){
	//load the available keys to the list box.
	for(int i=0;i<INPUTMGR_MAX;i++){
	//Get the description of the key.
	std::string s=_(keySettingDescription[i]);
	s+=": ";

	//Get key code name.
	int keyCode=parent->getKeyCode((InputManagerKeys)i,false);
	s+=_(InputManager::getKeyCodeName(keyCode));

	//Add the alternative key if there is one.
	int keyCodeAlt=parent->getKeyCode((InputManagerKeys)i,true);
	if(keyCodeAlt!=0){
	s+=" ";
	s+=_("OR");
	s+=" ";
	s+=_(InputManager::getKeyCodeName(keyCodeAlt));
	}

	//Add item.
	listBox->addItem(renderer, s);
	}
	}

	virtual ~InputDialogHandler(){}

	//When a key is pressed call this to set the key to currently-selected item.
	void onKeyDown(SDL_Renderer& renderer,int keyCode){
	//Check if an item is selected.
	int index=listBox->value;
	if(index<0 \|\| index>=INPUTMGR_MAX) return;

	//Update the key.
	//SDLK_BACKSPACE will erase the key.
	if(keyCode==SDLK_BACKSPACE){
	parent->setKeyCode((InputManagerKeys)index,0,true);
	parent->setKeyCode((InputManagerKeys)index,0,false);
	updateConfigItem(renderer,index);
	}else{
	//Update the main key if there isn't one. Otherwise update the alternative key if there isn't one.
	int key=parent->getKeyCode((InputManagerKeys)index,false);
	int altKey=parent->getKeyCode((InputManagerKeys)index,true);
	if(key==0){
	parent->setKeyCode((InputManagerKeys)index,keyCode,false);
	}else if((altKey==0)&&(keyCode!=key)){
	parent->setKeyCode((InputManagerKeys)index,keyCode,true);
	}
	updateConfigItem(renderer,index);
	}
	}

	void GUIEventCallback_OnEvent(ImageManager& imageManager, SDL_Renderer& renderer, std::string name,GUIObject* obj,int eventType){
	//Do nothing...
	}
	};

	//Event handler.
	static InputDialogHandler* handler;

	//A GUIObject that is used to create events for key presses.
	class GUIKeyListener:public GUIObject{
	public:

	GUIKeyListener(ImageManager& imageManager, SDL_Renderer& renderer)
	:GUIObject(imageManager,renderer){}
	private:
	//Leave empty.
	~GUIKeyListener(){}

	bool handleEvents(SDL_Renderer& renderer,int x,int y,bool enabled,bool visible,bool processed){
	if(enabled && handler){
	if(event.type==SDL_KEYDOWN){
	handler->onKeyDown(renderer,event.key.keysym.sym);
	}
	//Joystick
	else if(event.type==SDL_JOYAXISMOTION){
	if(event.jaxis.value>3200){
	handler->onKeyDown(renderer,0x00010001 \| (int(event.jaxis.axis)<<8));
	}else if(event.jaxis.value<-3200){
	handler->onKeyDown(renderer,0x000100FF \| (int(event.jaxis.axis)<<8));
	}
	}
	else if(event.type==SDL_JOYBUTTONDOWN){
	handler->onKeyDown(renderer,0x00020000 \| (int(event.jbutton.button)<<8));
	}
	else if(event.type==SDL_JOYHATMOTION){
	if(event.jhat.value & SDL_HAT_LEFT){
	handler->onKeyDown(renderer,0x00030000 \| (int(event.jhat.hat)<<8) \| SDL_HAT_LEFT);
	}else if(event.jhat.value & SDL_HAT_RIGHT){
	handler->onKeyDown(renderer,0x00030000 \| (int(event.jhat.hat)<<8) \| SDL_HAT_RIGHT);
	}else if(event.jhat.value & SDL_HAT_UP){
	handler->onKeyDown(renderer,0x00030000 \| (int(event.jhat.hat)<<8) \| SDL_HAT_UP);
	}else if(event.jhat.value & SDL_HAT_DOWN){
	handler->onKeyDown(renderer,0x00030000 \| (int(event.jhat.hat)<<8) \| SDL_HAT_DOWN);
	}
	}
	}
	return false;
	}

	//Nothing to do.
	void render(){}
	};

	int InputManager::getKeyCode(InputManagerKeys key,bool isAlternativeKey){
	if(isAlternativeKey) return alternativeKeys[key];
	else return keys[key];
	}

	void InputManager::setKeyCode(InputManagerKeys key,int keyCode,bool isAlternativeKey){
	if(isAlternativeKey) alternativeKeys[key]=keyCode;
	else keys[key]=keyCode;
	}

	void InputManager::loadConfig(){
	for(int i=0;i<INPUTMGR_MAX;i++){
	string s=keySettingNames[i];

	keys[i]=atoi(getSettings()->getValue(s).c_str());

	s+="2";
	alternativeKeys[i]=atoi(getSettings()->getValue(s).c_str());

	//Move the alternative key to main key if the main key is empty.
	if(keys[i]==0&&alternativeKeys[i]!=0){
	keys[i]=alternativeKeys[i];
	alternativeKeys[i]=0;
	}

	//Remove duplicate.
	if(keys[i]==alternativeKeys[i])
	alternativeKeys[i]=0;
	}
	}

	void InputManager::saveConfig(){
	int i;
	char c[32];
	for(i=0;i<INPUTMGR_MAX;i++){
	string s=keySettingNames[i];

	//Remove duplicate.
	if(keys[i]==alternativeKeys[i])
	alternativeKeys[i]=0;

	sprintf(c,"%d",keys[i]);
	getSettings()->setValue(s,c);

	s+="2";
	sprintf(c,"%d",alternativeKeys[i]);
	getSettings()->setValue(s,c);
	}
	}

	GUIObject* InputManager::showConfig(ImageManager& imageManager, SDL_Renderer& renderer,int height){
	//Create the new GUI.
	GUIObject* root=new GUIObject(imageManager,renderer,0,0,SCREEN_WIDTH,height);

	//Instruction label.
	GUIObject* obj=new GUILabel(imageManager,renderer,0,6,root->width,36,_("Select an item and press a key to change it."),0,true,true,GUIGravityCenter);
	root->addChild(obj);

	obj=new GUILabel(imageManager,renderer,0,30,root->width,36,_("Press backspace to clear the selected item."),0,true,true,GUIGravityCenter);
	root->addChild(obj);

	//The listbox for keys.
	GUIListBox listBox=new GUIListBox(imageManager,renderer,SCREEN_WIDTH0.15,72,SCREEN_WIDTH*0.7,height-72-8);
	root->addChild(listBox);

	//Create the event handler.
	if(handler)
	delete handler;
	handler=new InputDialogHandler(renderer,listBox,this);

	obj=new GUIKeyListener(imageManager,renderer);
	root->addChild(obj);

	//Return final widget.
	return root;
	}

	//Get key name from key code.
	std::string InputManager::getKeyCodeName(int keyCode){
	char c[64];
	// if(keyCode>0 && keyCode <0x1000){
	//Keyboard.
	const char* s=SDL_GetKeyName(static_cast<SDL_Keycode>(keyCode));
	if(s!=NULL){
	return s;
	}else{
	SDL_snprintf(c,64,"(Key %d)",keyCode);
	return c;
	}
	//TODO Key code numbers seems to have changed in SDL2
	/* }else if(keyCode>0x1000){
	//Joystick. First set it to invalid value.
	sprintf(c,"(Joystick 0x%08X)",keyCode);
	//Check the input type.
	switch((keyCode & 0x00FF0000)>>16){
	case 1:
	//Axis.
	switch(keyCode & 0xFF){
	case 1:
	sprintf(c,"Joystick axis %d +",(keyCode & 0x0000FF00)>>8);
	break;
	case 0xFF:
	sprintf(c,"Joystick axis %d -",(keyCode & 0x0000FF00)>>8);
	break;
	}
	break;
	case 2:
	//Button.
	sprintf(c,"Joystick button %d",(keyCode & 0x0000FF00)>>8);
	break;
	case 3:
	//Hat.
	switch(keyCode & 0xFF){
	case SDL_HAT_LEFT:
	sprintf(c,"Joystick hat %d left",(keyCode & 0x0000FF00)>>8);
	break;
	case SDL_HAT_RIGHT:
	sprintf(c,"Joystick hat %d right",(keyCode & 0x0000FF00)>>8);
	break;
	case SDL_HAT_UP:
	sprintf(c,"Joystick hat %d up",(keyCode & 0x0000FF00)>>8);
	break;
	case SDL_HAT_DOWN:
	sprintf(c,"Joystick hat %d down",(keyCode & 0x0000FF00)>>8);
	break;
	}
	break;
	}
	return c;
	}else{
	//Disabled or unknown.
	return "-";
	}*/
	}

	InputManager::InputManager(){
	//Clear the arrays.
	for(int i=0;i<INPUTMGR_MAX;i++){
	keys[i]=alternativeKeys[i]=keyFlags[i]=0;
	}
	}

	InputManager::~InputManager(){
	closeAllJoysticks();
	}

	int InputManager::getKeyState(int keyCode,int oldState,bool hasEvent){
	int state=0;
	// if(keyCode>0 && keyCode<0x1000){
	//Keyboard.
	if(hasEvent){
	if(event.type==SDL_KEYDOWN && event.key.keysym.sym==keyCode){
	state\|=0x2;
	}
	if(event.type==SDL_KEYUP && event.key.keysym.sym==keyCode){
	state\|=0x4;
	}
	}
	//Get keyboard state for key code
	//SDL_GetKeyboardState needs a scankey rather than keycode, so we convert
	int numKeys = 0;
	const Uint8* keyStates = SDL_GetKeyboardState(&numKeys);
	SDL_Scancode scanCode = SDL_GetScancodeFromKey(keyCode);
	if(scanCode<numKeys && keyStates[scanCode]){
	state\|=0x1;
	}
	//TODO - key code numbers seems to have changed in SDL2, so disabling joystick for now
	/* }else if(keyCode>0x1000){
	//Joystick.
	int index=(keyCode & 0x0000FF00)>>8;
	int value=keyCode & 0xFF;
	int i,v;
	switch((keyCode & 0x00FF0000)>>16){
	case 1:
	//Axis.
	if(hasEvent){
	if(event.type==SDL_JOYAXISMOTION && event.jaxis.axis==index){
	if((value==1 && event.jaxis.value>3200) \|\| (value==0xFF && event.jaxis.value<-3200)){
	if((oldState & 0x1)==0) state\|=0x2;
	}else{
	if(oldState & 0x1) state\|=0x4;
	}
	}
	}
	for(i=0;i<(int)joysticks.size();i++){
	v=SDL_JoystickGetAxis(joysticks[i],index);
	if((value==1 && v>3200) \|\| (value==0xFF && v<-3200)){
	state\|=0x1;
	break;
	}
	}
	break;
	case 2:
	//Button.
	if(hasEvent){
	if(event.type==SDL_JOYBUTTONDOWN && event.jbutton.button==index){
	state\|=0x2;
	}
	if(event.type==SDL_JOYBUTTONUP && event.jbutton.button==index){
	state\|=0x4;
	}
	}
	for(i=0;i<(int)joysticks.size();i++){
	v=SDL_JoystickGetButton(joysticks[i],index);
	if(v){
	state\|=0x1;
	break;
	}
	}
	break;
	case 3:
	//Hat.
	if(hasEvent){
	if(event.type==SDL_JOYHATMOTION && event.jhat.hat==index){
	if(event.jhat.value & value){
	if((oldState & 0x1)==0) state\|=0x2;
	}else{
	if(oldState & 0x1) state\|=0x4;
	}
	}
	}
	for(i=0;i<(int)joysticks.size();i++){
	v=SDL_JoystickGetHat(joysticks[i],index);
	if(v & value){
	state\|=0x1;
	break;
	}
	}
	break;
	}
	}*/
	return state;
	}

	//Update the key state, according to current SDL event, etc.
	void InputManager::updateState(bool hasEvent){
	for(int i=0;i<INPUTMGR_MAX;i++){
	keyFlags[i]=getKeyState(keys[i],keyFlags[i],hasEvent)\|getKeyState(alternativeKeys[i],keyFlags[i],hasEvent);
	}
	}

	//Check if there is KeyDown event.
	bool InputManager::isKeyDownEvent(InputManagerKeys key){
	return keyFlags[key]&0x2;
	}

	//Check if there is KeyUp event.
	bool InputManager::isKeyUpEvent(InputManagerKeys key){
	return keyFlags[key]&0x4;
	}

	//Check if specified key is down.
	bool InputManager::isKeyDown(InputManagerKeys key){
	return keyFlags[key]&0x1;
	}

	//Open all joysticks.
	void InputManager::openAllJoysitcks(){
	int i,m;
	//First close previous joysticks.
	closeAllJoysticks();

	//Open all joysticks.
	m=SDL_NumJoysticks();
	for(i=0;i<m;i++){
	SDL_Joystick *j=SDL_JoystickOpen(i);
	if(j==NULL){
	printf("ERROR: Couldn't open Joystick %d\n",i);
	}else{
	joysticks.push_back(j);
	}
	}
	}

	//Close all joysticks.
	void InputManager::closeAllJoysticks(){
	for(int i=0;i<(int)joysticks.size();i++){
	SDL_JoystickClose(joysticks[i]);
	}
	joysticks.clear();
	}

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