/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
 *
 *                                                         Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
 *                                               .)j(] .d_/ '-(  P .   S
 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
 * Redistribution and use in source and          _dV>ws?a-?'      ._/L  #'
 * binary forms, with or without                 )4d[#7r, .   '     )d`)[
 * modification, are permitted provided         _Q-5'5W..j/?'   -?!\)cam'
 * that the following conditions are met:       j<<WP+k/);.        _W=j f
 * 1. Redistributions of source code must       .$%w\/]Q  . ."'  .  mj$
 *    retain the above copyright notice,        ]E.pYY(Q]>.   a     J@\
 *    this list of conditions and the           j(]1u<sE"L,. .   ./^ ]{a
 *    following disclaimer.                     4'_uomm\.  )L);-4     (3=
 * 2. Redistributions in binary form must        )_]X{Z('a_"a7'<a"a,  ]"[
 *    reproduce the above copyright notice,       #}<]m7`Za??4,P-"'7. ).m
 *    this list of conditions and the            ]d2e)Q(<Q(  ?94   b-  LQ/
 *    following disclaimer in the                <B!</]C)d_, '(<' .f. =C+m
 *    documentation and/or other materials      .Z!=J ]e []('-4f _ ) -.)m]'
 *    provided with the distribution.          .w[5]' _[ /.)_-"+?   _/ <W"
 * 3. Neither the name of Guichan nor the      :$we` _! + _/ .        j?
 *    names of its contributors may be used     =3)= _f  (_yQmWW$#(    "
 *    to endorse or promote products derived     -   W,  sQQQQmZQ#Wwa]..
 *    from this software without specific        (js, \[QQW$QWW#?!V"".
 *    prior written permission.                    ]y:.<\..          .
 *                                                 -]n w/ '         [.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT       )/ )/           !
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY         <  (; sac    ,    '
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING,               ]^ .-  %
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF            c <   r
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR            aga<  <La
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE          5%  )P'-3L
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR        _bQf` y`..)a
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,          ,J?4P'.P"_(\?d'.,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES               _Pa,)!f/<[]/  ?"
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT      _2-..:. .r+_,.. .
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,     ?a.<%"'  " -'.a_ _,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION)                     ^
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * For comments regarding functions please see the header file.
 */

#include "guisan/widget.hpp"

#include "guisan/actionevent.hpp"
#include "guisan/actionlistener.hpp"
#include "guisan/basiccontainer.hpp"
#include "guisan/deathlistener.hpp"
#include "guisan/defaultfont.hpp"
#include "guisan/event.hpp"
#include "guisan/exception.hpp"
#include "guisan/focushandler.hpp"
#include "guisan/keyinput.hpp"
#include "guisan/keylistener.hpp"
#include "guisan/mouseinput.hpp"
#include "guisan/mouselistener.hpp"
#include "guisan/widgetlistener.hpp"

namespace gcn
{
	Font* Widget::mGlobalFont = NULL;
	DefaultFont Widget::mDefaultFont;
	std::list<Widget*> Widget::mWidgets;

	Widget::Widget()
		: mForegroundColor(0x000000),
		  mBackgroundColor(0xffffff),
		  mBaseColor(0xDDDDE3),
		  mSelectionColor(0xc3d9ff),
		  mFocusHandler(NULL),
		  mInternalFocusHandler(NULL),
		  mParent(NULL),
		  mBorderSize(0),
		  mFocusable(false),
		  mVisible(true),
		  mTabIn(true),
		  mTabOut(true),
		  mEnabled(true),
		  mCurrentFont(NULL)
	{
		mWidgets.push_back(this);
	}

	Widget::~Widget()
	{
		for (auto& mDeathListener : mDeathListeners)
		{
			Event event(this);
			mDeathListener->death(event);
		}

		_setFocusHandler(NULL);

		mWidgets.remove(this);
	}

	void Widget::_setParent(Widget* parent)
	{
		mParent = parent;
	}

	Widget* Widget::getParent() const
	{
		return mParent;
	}

	void Widget::setWidth(int width)
	{
		Rectangle newDimension = mDimension;
		newDimension.width = width;

		setDimension(newDimension);
	}

	int Widget::getWidth() const
	{
		return mDimension.width;
	}

	void Widget::setHeight(int height)
	{
		Rectangle newDimension = mDimension;
		newDimension.height = height;

		setDimension(newDimension);
	}

	int Widget::getHeight() const
	{
		return mDimension.height;
	}

	void Widget::setX(int x)
	{
		Rectangle newDimension = mDimension;
		newDimension.x = x;

		setDimension(newDimension);
	}

	int Widget::getX() const
	{
		return mDimension.x;
	}

	void Widget::setY(int y)
	{
		Rectangle newDimension = mDimension;
		newDimension.y = y;

		setDimension(newDimension);
	}

	int Widget::getY() const
	{
		return mDimension.y;
	}

	void Widget::setPosition(int x, int y)
	{
		Rectangle newDimension = mDimension;
		newDimension.x = x;
		newDimension.y = y;

		setDimension(newDimension);
	}

	void Widget::setDimension(const Rectangle& dimension)
	{
		const Rectangle oldDimension = mDimension;
		mDimension = dimension;

		if (mDimension.width != oldDimension.width
			|| mDimension.height != oldDimension.height)
		{
			distributeResizedEvent();
		}

		if (mDimension.x != oldDimension.x
			|| mDimension.y != oldDimension.y)
		{
			distributeMovedEvent();
		}
	}

	void Widget::setBorderSize(unsigned int borderSize)
	{
		mBorderSize = borderSize;
	}

	unsigned int Widget::getBorderSize() const
	{
		return mBorderSize;
	}

	const Rectangle& Widget::getDimension() const
	{
		return mDimension;
	}

	const std::string& Widget::getActionEventId() const
	{
		return mActionEventId;
	}

	void Widget::setActionEventId(const std::string& actionEventId)
	{
		mActionEventId = actionEventId;
	}

	bool Widget::isFocused() const
	{
		if (!mFocusHandler)
		{
			return false;
		}

		return mFocusHandler->isFocused(this);
	}

	void Widget::setFocusable(bool focusable)
	{
		if (!focusable && isFocused())
		{
			mFocusHandler->focusNone();
		}

		mFocusable = focusable;
	}

	bool Widget::isFocusable() const
	{
		return mFocusable && isVisible() && isEnabled();
	}

	void Widget::requestFocus()
	{
		if (mFocusHandler == NULL)
		{
			throw GCN_EXCEPTION("No focushandler set (did you add the widget to the gui?).");
		}

		if (isFocusable())
		{
			mFocusHandler->requestFocus(this);
		}
	}

	void Widget::requestMoveToTop()
	{
		if (mParent)
		{
			mParent->moveToTop(this);
		}
	}

	void Widget::requestMoveToBottom()
	{
		if (mParent)
		{
			mParent->moveToBottom(this);
		}
	}

	void Widget::setVisible(bool visible)
	{
		if (!visible && isFocused())
		{
			mFocusHandler->focusNone();
		}

		if (visible)
		{
			distributeShownEvent();
		}
		else if (!visible)
		{
			distributeHiddenEvent();
		}

		mVisible = visible;
	}

	bool Widget::isVisible() const
	{
		if (getParent() == NULL)
		{
			return mVisible;
		}
		return mVisible && getParent()->isVisible();
	}

	void Widget::setBaseColor(const Color& color)
	{
		mBaseColor = color;
	}

	const Color& Widget::getBaseColor() const
	{
		return mBaseColor;
	}

	void Widget::setForegroundColor(const Color& color)
	{
		mForegroundColor = color;
	}

	const Color& Widget::getForegroundColor() const
	{
		return mForegroundColor;
	}

	void Widget::setBackgroundColor(const Color& color)
	{
		mBackgroundColor = color;
	}

	const Color& Widget::getBackgroundColor() const
	{
		return mBackgroundColor;
	}

	void Widget::setSelectionColor(const Color& color)
	{
		mSelectionColor = color;
	}

	const Color& Widget::getSelectionColor() const
	{
		return mSelectionColor;
	}

	void Widget::_setFocusHandler(FocusHandler* focusHandler)
	{
		if (mFocusHandler)
		{
			releaseModalFocus();
			mFocusHandler->remove(this);
		}

		if (focusHandler)
		{
			focusHandler->add(this);
		}

		mFocusHandler = focusHandler;
	}

	FocusHandler* Widget::_getFocusHandler()
	{
		return mFocusHandler;
	}

	void Widget::addActionListener(ActionListener* actionListener)
	{
		mActionListeners.push_back(actionListener);
	}

	void Widget::removeActionListener(ActionListener* actionListener)
	{
		mActionListeners.remove(actionListener);
	}

	void Widget::addDeathListener(DeathListener* deathListener)
	{
		mDeathListeners.push_back(deathListener);
	}

	void Widget::removeDeathListener(DeathListener* deathListener)
	{
		mDeathListeners.remove(deathListener);
	}

	void Widget::addKeyListener(KeyListener* keyListener)
	{
		mKeyListeners.push_back(keyListener);
	}

	void Widget::removeKeyListener(KeyListener* keyListener)
	{
		mKeyListeners.remove(keyListener);
	}

	void Widget::addFocusListener(FocusListener* focusListener)
	{
		mFocusListeners.push_back(focusListener);
	}

	void Widget::removeFocusListener(FocusListener* focusListener)
	{
		mFocusListeners.remove(focusListener);
	}

	void Widget::addMouseListener(MouseListener* mouseListener)
	{
		mMouseListeners.push_back(mouseListener);
	}

	void Widget::removeMouseListener(MouseListener* mouseListener)
	{
		mMouseListeners.remove(mouseListener);
	}

	void Widget::addWidgetListener(WidgetListener* widgetListener)
	{
		mWidgetListeners.push_back(widgetListener);
	}

	void Widget::removeWidgetListener(WidgetListener* widgetListener)
	{
		mWidgetListeners.remove(widgetListener);
	}

	void Widget::getAbsolutePosition(int& x, int& y) const
	{
		if (getParent() == NULL)
		{
			x = mDimension.x;
			y = mDimension.y;
			return;
		}

		int parentX;
		int parentY;

		getParent()->getAbsolutePosition(parentX, parentY);

		x = parentX + mDimension.x + getParent()->getChildrenArea().x;
		y = parentY + mDimension.y + getParent()->getChildrenArea().y;
	}

	void Widget::generateAction()
	{
		for (auto& mActionListener : mActionListeners)
		{
			ActionEvent actionEvent(this, mActionEventId);
			mActionListener->action(actionEvent);
		}
	}

	Font* Widget::getFont() const
	{
		if (mCurrentFont == NULL)
		{
			if (mGlobalFont == NULL)
			{
				return &mDefaultFont;
			}

			return mGlobalFont;
		}

		return mCurrentFont;
	}

	void Widget::setGlobalFont(Font* font)
	{
		mGlobalFont = font;

		for (auto& mWidget : mWidgets)
		{
			if (mWidget->mCurrentFont == NULL)
			{
				mWidget->fontChanged();
			}
		}
	}

	void Widget::setFont(Font* font)
	{
		mCurrentFont = font;
		fontChanged();
	}

	bool Widget::widgetExists(const Widget* widget)
	{
		for (auto& mWidget : mWidgets)
		{
			if (mWidget == widget)
			{
				return true;
			}
		}

		return false;
	}

	bool Widget::isTabInEnabled() const
	{
		return mTabIn;
	}

	void Widget::setTabInEnabled(bool enabled)
	{
		mTabIn = enabled;
	}

	bool Widget::isTabOutEnabled() const
	{
		return mTabOut;
	}

	void Widget::setTabOutEnabled(bool enabled)
	{
		mTabOut = enabled;
	}

	void Widget::setSize(int width, int height)
	{
		Rectangle newDimension = mDimension;
		newDimension.width = width;
		newDimension.height = height;

		setDimension(newDimension);
	}

	void Widget::setEnabled(bool enabled)
	{
		mEnabled = enabled;
	}

	bool Widget::isEnabled() const
	{
		return mEnabled && isVisible();
	}

	void Widget::requestModalFocus()
	{
		if (mFocusHandler == NULL)
		{
			throw GCN_EXCEPTION("No focushandler set (did you add the widget to the gui?).");
		}

		mFocusHandler->requestModalFocus(this);
	}

	void Widget::requestModalMouseInputFocus()
	{
		if (mFocusHandler == NULL)
		{
			throw GCN_EXCEPTION("No focushandler set (did you add the widget to the gui?).");
		}

		mFocusHandler->requestModalMouseInputFocus(this);
	}

	void Widget::releaseModalFocus()
	{
		if (mFocusHandler == NULL)
		{
			return;
		}

		mFocusHandler->releaseModalFocus(this);
	}

	void Widget::releaseModalMouseInputFocus()
	{
		if (mFocusHandler == NULL)
		{
			return;
		}

		mFocusHandler->releaseModalMouseInputFocus(this);
	}

	bool Widget::hasModalFocus() const
	{
		if (mFocusHandler == NULL)
		{
			throw GCN_EXCEPTION("No focushandler set (did you add the widget to the gui?).");
		}

		if (getParent() != NULL)
		{
			return mFocusHandler->getModalFocused() == this || getParent()->hasModalFocus();
		}

		return mFocusHandler->getModalFocused() == this;
	}

	bool Widget::hasModalMouseInputFocus() const
	{
		if (mFocusHandler == NULL)
		{
			throw GCN_EXCEPTION("No focushandler set (did you add the widget to the gui?).");
		}

		if (getParent() != NULL)
		{
			return mFocusHandler->getModalMouseInputFocused() == this || getParent()->hasModalMouseInputFocus();
		}

		return mFocusHandler->getModalMouseInputFocused() == this;
	}

	Widget* Widget::getWidgetAt(int x, int y)
	{
		return NULL;
	}

	const std::list<MouseListener*>& Widget::_getMouseListeners()
	{
		return mMouseListeners;
	}

	const std::list<KeyListener*>& Widget::_getKeyListeners()
	{
		return mKeyListeners;
	}

	const std::list<FocusListener*>& Widget::_getFocusListeners()
	{
		return mFocusListeners;
	}

	Rectangle Widget::getChildrenArea()
	{
		return Rectangle(0, 0, 0, 0);
	}

	FocusHandler* Widget::_getInternalFocusHandler()
	{
		return mInternalFocusHandler;
	}

	void Widget::setInternalFocusHandler(FocusHandler* focusHandler)
	{
		mInternalFocusHandler = focusHandler;
	}

	void Widget::setId(const std::string& id)
	{
		mId = id;
	}

	const std::string& Widget::getId()
	{
		return mId;
	}

	void Widget::distributeResizedEvent()
	{
		for (auto& mWidgetListener : mWidgetListeners)
		{
			Event event(this);
			mWidgetListener->widgetResized(event);
		}
	}

	void Widget::distributeMovedEvent()
	{
		for (auto& mWidgetListener : mWidgetListeners)
		{
			Event event(this);
			mWidgetListener->widgetMoved(event);
		}
	}

	void Widget::distributeHiddenEvent()
	{
		for (auto& mWidgetListener : mWidgetListeners)
		{
			Event event(this);
			mWidgetListener->widgetHidden(event);
		}
	}

	void Widget::distributeShownEvent()
	{
		for (auto& mWidgetListener : mWidgetListeners)
		{
			Event event(this);
			mWidgetListener->widgetShown(event);
		}
	}
}
