/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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 2
 * of the License, or (at your option) any later version.

 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "kyra/gui_v2.h"
#include "kyra/kyra_v2.h"
#include "kyra/screen_v2.h"
#include "kyra/text.h"

#include "common/savefile.h"

namespace Kyra {

GUI_v2::GUI_v2(KyraEngine_v2 *vm) : GUI(vm), _vm(vm), _screen(vm->screen_v2()) {
	_backUpButtonList = _unknownButtonList = 0;
	_buttonListChanged = false;

	_currentMenu = 0;
	_isDeathMenu = false;
	_isSaveMenu = false;
	_isLoadMenu = false;
	_scrollUpFunctor = BUTTON_FUNCTOR(GUI_v2, this, &GUI_v2::scrollUpButton);
	_scrollDownFunctor = BUTTON_FUNCTOR(GUI_v2, this, &GUI_v2::scrollDownButton);
	_sliderHandlerFunctor = BUTTON_FUNCTOR(GUI_v2, this, &GUI_v2::sliderHandler);
	_savegameOffset = 0;
	_isDeleteMenu = false;
}

Button *GUI_v2::addButtonToList(Button *list, Button *newButton) {
	list = GUI::addButtonToList(list, newButton);
	_buttonListChanged = true;
	return list;
}

void GUI_v2::processButton(Button *button) {
	if (!button)
		return;

	if (button->flags & 8) {
		if (button->flags & 0x10) {
			// XXX
		}
		return;
	}
	
	int entry = button->flags2 & 5;

	byte val1 = 0, val2 = 0, val3 = 0;
	const uint8 *dataPtr = 0;
	Button::Callback callback;
	if (entry == 1) {
		val1 = button->data1Val1;
		dataPtr = button->data1ShapePtr;
		callback = button->data1Callback;
		val2 = button->data1Val2;
		val3 = button->data1Val3;
	} else if (entry == 4 || entry == 5) {
		val1 = button->data2Val1;
		dataPtr = button->data2ShapePtr;
		callback = button->data2Callback;
		val2 = button->data2Val2;
		val3 = button->data2Val3;
	} else {
		val1 = button->data0Val1;
		dataPtr = button->data0ShapePtr;
		callback = button->data0Callback;
		val2 = button->data0Val2;
		val3 = button->data0Val3;
	}

	int x = 0, y = 0, x2 = 0, y2 = 0;

	x = button->x;
	if (x < 0)
		x += _screen->getScreenDim(button->dimTableIndex)->w << 3;
	x += _screen->getScreenDim(button->dimTableIndex)->sx << 3;
	x2 = x + button->width - 1;

	y = button->y;
	if (y < 0)
		y += _screen->getScreenDim(button->dimTableIndex)->h << 3;
	y += _screen->getScreenDim(button->dimTableIndex)->sy << 3;
	y2 = y + button->height - 1;

	switch (val1 - 1) {
	case 0:
		_screen->hideMouse();
		_screen->drawShape(_screen->_curPage, dataPtr, x, y, button->dimTableIndex, 0x10);
		_screen->showMouse();
		break;

	case 1:
		_screen->hideMouse();
		_screen->printText((const char*)dataPtr, x, y, val2, val3);
		_screen->showMouse();
		break;

	case 3:
		if (callback)
			(*callback)(button);
		break;

	case 4:
		_screen->hideMouse();
		_screen->drawBox(x, y, x2, y2, val2);
		_screen->showMouse();
		break;

	case 5:
		_screen->hideMouse();
		_screen->fillRect(x, y, x2, y2, val2, -1, true);
		_screen->showMouse();
		break;

	default:
		break;
	}

	_screen->updateScreen();
}

int GUI_v2::processButtonList(Button *buttonList, uint16 inputFlag, int8 mouseWheel) {
	static uint16 flagsModifier = 0;

	if (!buttonList)
		return inputFlag & 0x7FFF;

	if (_backUpButtonList != buttonList || _buttonListChanged) {
		_unknownButtonList = 0;
		//flagsModifier |= 0x2200;
		_backUpButtonList = buttonList;
		_buttonListChanged = false;

		while (buttonList) {
			processButton(buttonList);
			buttonList = buttonList->nextButton;
		}
	}

	int mouseX = _vm->_mouseX;
	int mouseY = _vm->_mouseY;

	uint16 flags = 0;

	if (1/*!_screen_cursorDisable*/) {
		uint16 inFlags = inputFlag & 0xFF;
		uint16 temp = 0;

		// HACK: inFlags == 200 is our left button (up)
		if (inFlags == 199 || inFlags == 200)
			temp = 0x1000;
		if (inFlags == 198)
			temp = 0x100;

		if (inputFlag & 0x800)
			temp <<= 2;

		flags |= temp;

		flagsModifier &= ~((temp & 0x4400) >> 1);
		flagsModifier |= (temp & 0x1100) * 2;
		flags |= flagsModifier;
		flags |= (flagsModifier << 2) ^ 0x8800;
	}

	buttonList = _backUpButtonList;
	if (_unknownButtonList) {
		buttonList = _unknownButtonList;
		if (_unknownButtonList->flags & 8)
			_unknownButtonList = 0;
	}

	int returnValue = 0;
	while (buttonList) {
		if (buttonList->flags & 8) {
			buttonList = buttonList->nextButton;
			continue;
		}
		buttonList->flags2 &= ~0x18;
		buttonList->flags2 |= (buttonList->flags2 & 3) << 3;

		int x = buttonList->x;
		if (x < 0)
			x += _screen->getScreenDim(buttonList->dimTableIndex)->w << 3;
		x += _screen->getScreenDim(buttonList->dimTableIndex)->sx << 3;

		int y = buttonList->y;
		if (y < 0)
			y += _screen->getScreenDim(buttonList->dimTableIndex)->h;
		y += _screen->getScreenDim(buttonList->dimTableIndex)->sy;

		bool progress = false;

		if (mouseX >= x && mouseY >= y && mouseX <= x+buttonList->width && mouseY <= y+buttonList->height)
			progress = true;

		buttonList->flags2 &= ~0x80;
		uint16 inFlags = inputFlag & 0x7FFF;
		if (inFlags) {
			if (buttonList->unk6 == inFlags) {
				progress = true;
				flags = buttonList->flags & 0x0F00;
				buttonList->flags2 |= 0x80;
				inputFlag = 0;
				_unknownButtonList = buttonList;
			} else if (buttonList->unk8 == inFlags) {
				flags = buttonList->flags & 0xF000;
				if (!flags)
					flags = buttonList->flags & 0x0F00;
				progress = true;
				buttonList->flags2 |= 0x80;
				inputFlag = 0;
				_unknownButtonList = buttonList;
			}
		}

		bool unk1 = false;

		if (mouseWheel && buttonList->mouseWheel == mouseWheel) {
			progress = true;
			unk1 = true;
		}

		if (!progress)
			buttonList->flags2 &= ~6;

		if ((flags & 0x3300) && (buttonList->flags & 4) && progress && (buttonList == _unknownButtonList || !_unknownButtonList)) {
			buttonList->flags |= 6;
			if (!_unknownButtonList)
				_unknownButtonList = buttonList;
		} else if ((flags & 0x8800) && !(buttonList->flags & 4) && progress) {
			buttonList->flags2 |= 6;
		} else {
			buttonList->flags2 &= ~6;
		}

		bool progressSwitch = false;
		if (!_unknownButtonList) {
			progressSwitch = progress;
		} else  {
			if (_unknownButtonList->flags & 0x40)
				progressSwitch = (_unknownButtonList == buttonList);
			else
				progressSwitch = progress;
		}

		if (progressSwitch) {
			if ((flags & 0x1100) && progress && !_unknownButtonList) {
				inputFlag = 0;
				_unknownButtonList = buttonList;
			}

			if ((buttonList->flags & flags) && (progress || !(buttonList->flags & 1))) {
				uint16 combinedFlags = (buttonList->flags & flags);
				combinedFlags = ((combinedFlags & 0xF000) >> 4) | (combinedFlags & 0x0F00);
				combinedFlags >>= 8;

				static const uint16 flagTable[] = {
					0x000, 0x100, 0x200, 0x100, 0x400, 0x100, 0x400, 0x100, 0x800, 0x100,
					0x200, 0x100, 0x400, 0x100, 0x400, 0x100
				};

				assert(combinedFlags < ARRAYSIZE(flagTable));

				switch (flagTable[combinedFlags]) {
				case 0x400:
					if (!(buttonList->flags & 1) || ((buttonList->flags & 1) && _unknownButtonList == buttonList)) {
						buttonList->flags2 ^= 1;
						returnValue = buttonList->index | 0x8000;
						unk1 = true;
					}

					if (!(buttonList->flags & 4)) {
						buttonList->flags2 &= ~4;
						buttonList->flags2 &= ~2;
					}
					break;

				case 0x800:
					if (!(buttonList->flags & 4)) {
						buttonList->flags2 |= 4;
						buttonList->flags2 |= 2;
					}

					if (!(buttonList->flags & 1))
						unk1 = true;
					break;

				case 0x200:
					if (buttonList->flags & 4) {
						buttonList->flags2 |= 4;
						buttonList->flags2 |= 2;
					}

					if (!(buttonList->flags & 1))
						unk1 = true;
					break;

				case 0x100:
				default:
					buttonList->flags2 ^= 1;
					returnValue = buttonList->index | 0x8000;
					unk1 = true;
					if (buttonList->flags & 4) {
						buttonList->flags2 |= 4;
						buttonList->flags2 |= 2;
					}
					_unknownButtonList = buttonList;
					break;
				}
			}
		}

		bool unk2 = false;
		if ((flags & 0x2200) && progress) {
			buttonList->flags2 |= 6;
			if (!(buttonList->flags & 4) && !(buttonList->flags2 & 1)) {
				unk2 = true;
				buttonList->flags2 |= 1;
			}
		}

		if ((flags & 0x8800) == 0x8800) {
			_unknownButtonList = 0;
			if (!progress || (buttonList->flags & 4))
				buttonList->flags2 &= ~6;
		}

		if (!progress && buttonList == _unknownButtonList && !(buttonList->flags & 0x40))
			_unknownButtonList = 0;

		if ((buttonList->flags2 & 0x18) != ((buttonList->flags2 & 3) << 3))
			processButton(buttonList);

		if (unk2)
			buttonList->flags2 &= ~1;

		if (unk1) {
			buttonList->flags2 &= 0xFF;
			buttonList->flags2 |= flags;

			if (buttonList->buttonCallback) {
				_vm->removeInputTop();
				if ((*buttonList->buttonCallback.get())(buttonList))
					break;
			}
			
			if (buttonList->flags & 0x20)
				break;
		}

		if (_unknownButtonList == buttonList && (buttonList->flags & 0x40))
			break;

		buttonList = buttonList->nextButton;
	}

	if (!returnValue)
		returnValue = inputFlag & 0x7FFF;
	return returnValue;
}

void GUI_v2::updateButton(Button *button) {
	if (!button || (button->flags & 8))
		return;

	if (button->flags2 & 1)
		button->flags2 |= 8;
	else
		button->flags2 |= ~8;

	button->flags2 &= ~1;

	if (button->flags2 & 4)
		button->flags2 |= 0x10;
	else
		button->flags2 &= ~0x10;

	button->flags2 &= ~4;

	processButton(button);
}

void GUI_v2::getInput() {
	if (!_displayMenu)
		return;

	_vm->checkInput(_menuButtonList);
	_vm->removeInputTop();
	if (_vm->quit()) {
		_displayMenu = false;
		_isLoadMenu = false;
		_isSaveMenu = false;
		_isOptionsMenu = false;
		_isDeleteMenu = false;
	}

	_vm->delay(10);
}

void GUI_v2::renewHighlight(Menu &menu) {
	if (!_displayMenu)
		return;

	MenuItem &item = menu.item[menu.highlightedItem];
	int x = item.x + menu.x; int y = item.y + menu.y;
	int x2 = x + item.width - 1; int y2 = y + item.height - 1;
	redrawText(menu);
	_screen->fillRect(x+2, y+2, x2-2, y2-2, item.bkgdColor);
	redrawHighlight(menu);
	_screen->updateScreen();
}

void GUI_v2::backUpPage1(uint8 *buffer) {
	_screen->copyRegionToBuffer(1, 0, 0, 320, 200, buffer);
}

void GUI_v2::restorePage1(const uint8 *buffer) {
	_screen->copyBlockToPage(1, 0, 0, 320, 200, buffer);
}

void GUI_v2::setupSavegameNames(Menu &menu, int num) {
	for (int i = 0; i < num; ++i) {
		strcpy(getTableString(menu.item[i].itemId), "");
		menu.item[i].saveSlot = -1;
		menu.item[i].enabled = false;
	}

	int startSlot = 0;
	if (_isSaveMenu && _savegameOffset == 0)
		startSlot = 1;

	KyraEngine_v1::SaveHeader header;
	Common::InSaveFile *in;
	for (int i = startSlot; i < num && uint(_savegameOffset + i) < _saveSlots.size(); ++i) {
		if ((in = _vm->openSaveForReading(_vm->getSavegameFilename(_saveSlots[i + _savegameOffset]), header)) != 0) {
			strncpy(getTableString(menu.item[i].itemId), header.description.c_str(), 80);
			getTableString(menu.item[i].itemId)[79] = 0;
			menu.item[i].saveSlot = _saveSlots[i + _savegameOffset];
			menu.item[i].enabled = true;
			delete in;
		}
	}

	if (_savegameOffset == 0) {
		if (_isSaveMenu) {
			char *dst = getTableString(menu.item[0].itemId);
			const char *src = getTableString(_vm->gameFlags().isTalkie ? 10 : 18);
			strcpy(dst, src);
			menu.item[0].saveSlot = -2;
			menu.item[0].enabled = true;
		} else {
			char *dst = getTableString(menu.item[0].itemId);
			const char *src = getTableString(_vm->gameFlags().isTalkie ? 34 : 42);
			strcpy(dst, src);
		}
	}
}

int GUI_v2::scrollUpButton(Button *button) {
	updateMenuButton(button);

	if (_savegameOffset == (_isDeleteMenu ? 1 : 0))
		return 0;

	--_savegameOffset;
	if (_isLoadMenu) {
		setupSavegameNames(_loadMenu, 5);
		// original calls something different here...
		initMenu(_loadMenu);
	} else if (_isSaveMenu || _isDeleteMenu) {
		setupSavegameNames(_saveMenu, 5);
		// original calls something different here...
		initMenu(_saveMenu);
	}

	return 0;
}

int GUI_v2::scrollDownButton(Button *button) {
	updateMenuButton(button);
	++_savegameOffset;

	if (uint(_savegameOffset + 5) >= _saveSlots.size())
		_savegameOffset = MAX<int>(_saveSlots.size() - 5, _isDeleteMenu ? 1 : 0);

	if (_isLoadMenu) {
		setupSavegameNames(_loadMenu, 5);
		// original calls something different here...
		initMenu(_loadMenu);
	} else if (_isSaveMenu || _isDeleteMenu) {
		setupSavegameNames(_saveMenu, 5);
		// original calls something different here...
		initMenu(_saveMenu);
	}

	return 0;
}

int GUI_v2::resumeGame(Button *caller) {
	updateMenuButton(caller);
	_displayMenu = false;
	return 0;
}

int GUI_v2::quitOptionsMenu(Button *caller) {
	updateMenuButton(caller);
	_isOptionsMenu = false;
	return 0;
}

int GUI_v2::toggleWalkspeed(Button *caller) {
	updateMenuButton(caller);
	if (_vm->_configWalkspeed == 5)
		_vm->_configWalkspeed = 3;
	else
		_vm->_configWalkspeed = 5;
	_vm->setWalkspeed(_vm->_configWalkspeed);
	setupOptionsButtons();
	renewHighlight(_gameOptions);
	return 0;
}

int GUI_v2::toggleText(Button *caller) {
	updateMenuButton(caller);
	
	if (_vm->textEnabled()) {
		if (_vm->speechEnabled())
			_vm->_configVoice = 1;
		else
			_vm->_configVoice = 3;
	} else {
		if (_vm->speechEnabled())
			_vm->_configVoice = 2;
		else
			_vm->_configVoice = 0;
	}

	setupOptionsButtons();
	renewHighlight(_gameOptions);
	return 0;
}

int GUI_v2::clickLoadSlot(Button *caller) {
	updateMenuButton(caller);

	int index = caller->index - _menuButtons[0].index;
	assert(index >= 0 && index <= 6);
	MenuItem &item = _loadMenu.item[index];

	if (item.saveSlot >= 0) {
		_vm->_gameToLoad = item.saveSlot;
		_isLoadMenu = false;
	}

	return 0;
}

int GUI_v2::cancelLoadMenu(Button *caller) {
	updateMenuButton(caller);
	_isLoadMenu = false;
	_noLoadProcess = true;
	return 0;
}

int GUI_v2::saveMenu(Button *caller) {
	updateSaveList();

	updateMenuButton(caller);

	restorePage1(_vm->_screenBuffer);
	backUpPage1(_vm->_screenBuffer);

	_isSaveMenu = true;
	_noSaveProcess = false;
	_saveSlot = -1;
	_savegameOffset = 0;
	setupSavegameNames(_saveMenu, 5);
	initMenu(_saveMenu);

	updateAllMenuButtons();

	while (_isSaveMenu) {
		processHighlights(_saveMenu, _vm->_mouseX, _vm->_mouseY);
		getInput();
	}

	if (_noSaveProcess) {
		restorePage1(_vm->_screenBuffer);
		backUpPage1(_vm->_screenBuffer);
		initMenu(*_currentMenu);
		updateAllMenuButtons();
		return 0;
	} else if(_saveSlot <= -1) {
		return 0;
	}

	restorePage1(_vm->_screenBuffer);
	restorePalette();

	Graphics::Surface thumb;
	createScreenThumbnail(thumb);
	_vm->saveGame(_vm->getSavegameFilename(_saveSlot), _saveDescription, &thumb);
	thumb.free();

	_displayMenu = false;
	_madeSave = true;

	return 0;
}

int GUI_v2::clickSaveSlot(Button *caller) {
	updateMenuButton(caller);

	int index = caller->index - _menuButtons[0].index;
	assert(index >= 0 && index <= 6);
	MenuItem &item = _saveMenu.item[index];
	
	if (item.saveSlot >= 0) {
		if (_isDeleteMenu) {
			_slotToDelete = item.saveSlot;
			_isDeleteMenu = false;
			return 0;
		} else {
			_saveSlot = item.saveSlot;
			strcpy(_saveDescription, getTableString(item.itemId));
		}
	} else if (item.saveSlot == -2) {
		_saveSlot = getNextSavegameSlot();
		memset(_saveDescription, 0, sizeof(_saveDescription));
	}

	restorePage1(_vm->_screenBuffer);
	backUpPage1(_vm->_screenBuffer);

	initMenu(_savenameMenu);
	_screen->fillRect(0x26, 0x5B, 0x11F, 0x66, textFieldColor2());
	const char *desc = nameInputProcess(_saveDescription, 0x27, 0x5C, textFieldColor1(), textFieldColor2(), textFieldColor3(), 0x50);
	restorePage1(_vm->_screenBuffer);
	backUpPage1(_vm->_screenBuffer);
	if (desc) {
		_isSaveMenu = false;
		_isDeleteMenu = false;
	} else {
		initMenu(_saveMenu);
	}

	return 0;
}

int GUI_v2::cancelSaveMenu(Button *caller) {
	updateMenuButton(caller);
	_isSaveMenu = false;
	_isDeleteMenu = false;
	_noSaveProcess = true;
	return 0;
}

int GUI_v2::deleteMenu(Button *caller) {
	updateSaveList();

	updateMenuButton(caller);
	if (_saveSlots.size() < 2) {
		_vm->snd_playSoundEffect(0x0D);
		return 0;
	}

	do {
		restorePage1(_vm->_screenBuffer);
		backUpPage1(_vm->_screenBuffer);
		_savegameOffset = 1;
		_saveMenu.menuNameId = _vm->gameFlags().isTalkie ? 35 : 1;
		setupSavegameNames(_saveMenu, 5);
		initMenu(_saveMenu);
		_isDeleteMenu = true;
		_slotToDelete = -1;
		updateAllMenuButtons();

		while (_isDeleteMenu) {
			processHighlights(_saveMenu, _vm->_mouseX, _vm->_mouseY);
			getInput();
		}
		
		if (_slotToDelete < 1) {
			restorePage1(_vm->_screenBuffer);
			backUpPage1(_vm->_screenBuffer);
			initMenu(*_currentMenu);
			updateAllMenuButtons();
			_saveMenu.menuNameId = _vm->gameFlags().isTalkie ? 9 : 17;
			return 0;
		}
	} while (choiceDialog(_vm->gameFlags().isTalkie ? 0x24 : 2, 1) == 0);

	restorePage1(_vm->_screenBuffer);
	backUpPage1(_vm->_screenBuffer);
	initMenu(*_currentMenu);
	updateAllMenuButtons();
	_vm->_saveFileMan->removeSavefile(_vm->getSavegameFilename(_slotToDelete));
	Common::Array<int>::iterator i = Common::find(_saveSlots.begin(), _saveSlots.end(), _slotToDelete);
	while (i != _saveSlots.end()) {
		++i;
		if (i == _saveSlots.end())
			break;
		// We are only renaming all savefiles until we get some slots missing
		// Also not rename quicksave slot filenames
		if (*(i-1) != *i || *i >= 990)
			break;
		Common::String oldName = _vm->getSavegameFilename(*i);
		Common::String newName = _vm->getSavegameFilename(*i-1);
		_vm->_saveFileMan->renameSavefile(oldName.c_str(), newName.c_str());
	}	
	_saveMenu.menuNameId = _vm->gameFlags().isTalkie ? 9 : 17;
	return 0;
}

const char *GUI_v2::nameInputProcess(char *buffer, int x, int y, uint8 c1, uint8 c2, uint8 c3, int bufferSize) {
	bool running = true;
	int curPos = strlen(buffer);

	int x2 = x, y2 = y;
	_text->printText(buffer, x, y, c1, c2, c2);

	for (int i = 0; i < curPos; ++i)
		x2 += getCharWidth(buffer[i]);

	drawTextfieldBlock(x2, y2, c3);

	_keyPressed.reset();
	_cancelNameInput = _finishNameInput = false;
	while (running && !_vm->quit()) {
		processHighlights(_savenameMenu, _vm->_mouseX, _vm->_mouseY);
		checkTextfieldInput();
		if (_keyPressed.keycode == Common::KEYCODE_RETURN || _keyPressed.keycode == Common::KEYCODE_KP_ENTER || _finishNameInput) {
			if (checkSavegameDescription(buffer, curPos)) {
				buffer[curPos] = 0;
				running = false;
			} else {
				_finishNameInput = false;
			}
		} else if (_keyPressed.keycode == Common::KEYCODE_ESCAPE || _cancelNameInput) {
			running = false;
			return 0;
		} else if ((_keyPressed.keycode == Common::KEYCODE_BACKSPACE || _keyPressed.keycode == Common::KEYCODE_DELETE) && curPos > 0) {
			drawTextfieldBlock(x2, y2, c2);
			--curPos;
			x2 -= getCharWidth(buffer[curPos]);
			drawTextfieldBlock(x2, y2, c3);
			_screen->updateScreen();
		} else if (_keyPressed.ascii > 31 && _keyPressed.ascii < 127 && curPos < bufferSize) {
			if (x2 + getCharWidth(_keyPressed.ascii) + 7 < 0x11F) {
				buffer[curPos] = _keyPressed.ascii;
				const char text[2] = { buffer[curPos], 0 };
				_text->printText(text, x2, y2, c1, c2, c2);
				x2 += getCharWidth(_keyPressed.ascii);
				drawTextfieldBlock(x2, y2, c3);
				++curPos;
				_screen->updateScreen();
			}
		}

		_keyPressed.reset();
	}

	return buffer;
}

int GUI_v2::finishSavename(Button *caller) {
	updateMenuButton(caller);
	_finishNameInput = true;
	return 0;
}

int GUI_v2::cancelSavename(Button *caller) {
	updateMenuButton(caller);
	_cancelNameInput = true;
	return 0;
}

bool GUI_v2::checkSavegameDescription(const char *buffer, int size) {
	if (!buffer || !size)
		return false;
	if (buffer[0] == 0)
		return false;
	for (int i = 0; i < size; ++i) {
		if (buffer[i] != 0x20)
			return true;
		else if (buffer[i] == 0x00)
			return false;
	}
	return false;
}

int GUI_v2::getCharWidth(uint8 c) {
	Screen::FontId old = _screen->setFont(Screen::FID_8_FNT);
	_screen->_charWidth = -2;
	int width = _screen->getCharWidth(c);
	_screen->_charWidth = 0;
	_screen->setFont(old);
	return width;
}

void GUI_v2::checkTextfieldInput() {
	Common::Event event;

	bool running = true;
	int keys = 0;
	while (_vm->_eventMan->pollEvent(event) && running) {
		switch (event.type) {
		case Common::EVENT_QUIT:
			_vm->_quitFlag = true;
			break;

		case Common::EVENT_KEYDOWN:
			if (event.kbd.keycode == 'q' && event.kbd.flags == Common::KBD_CTRL)
				_vm->_quitFlag = true;
			else
				_keyPressed = event.kbd; 
			running = false;
			break;

		case Common::EVENT_LBUTTONDOWN:
		case Common::EVENT_LBUTTONUP: {
			Common::Point pos = _vm->getMousePos();
			_vm->_mouseX = pos.x;
			_vm->_mouseY = pos.y;
			keys = event.type == Common::EVENT_LBUTTONDOWN ? 199 : (200 | 0x800);
			running = false;
			} break;

		case Common::EVENT_MOUSEMOVE: {
			Common::Point pos = _vm->getMousePos();
			_vm->_mouseX = pos.x;
			_vm->_mouseY = pos.y;
			_screen->updateScreen();
			} break;

		default:
			break;
		}
	}

	processButtonList(_menuButtonList, keys | 0x8000, 0);
}

void GUI_v2::drawTextfieldBlock(int x, int y, uint8 c) {
	_screen->fillRect(x+1, y+1, x+7, y+8, c);
}

bool GUI_v2::choiceDialog(int name, bool type) {
	_choiceMenu.highlightedItem = 0;
	restorePage1(_vm->_screenBuffer);
	backUpPage1(_vm->_screenBuffer);
	if (type)
		_choiceMenu.numberOfItems = 2;
	else
		_choiceMenu.numberOfItems = 1;
	_choiceMenu.menuNameId = name;

	initMenu(_choiceMenu);
	_isChoiceMenu = true;
	_choice = false;

	while (_isChoiceMenu) {
		processHighlights(_choiceMenu, _vm->_mouseX, _vm->_mouseY);
		getInput();
	}

	restorePage1(_vm->_screenBuffer);
	backUpPage1(_vm->_screenBuffer);
	return _choice;
}

int GUI_v2::choiceYes(Button *caller) {
	updateMenuButton(caller);
	_choice = true;
	_isChoiceMenu = false;
	return 0;
}

int GUI_v2::choiceNo(Button *caller) {
	updateMenuButton(caller);
	_choice = false;
	_isChoiceMenu = false;
	return 0;
}

} // end of namespace Kyra