/** 
 * @file lltoast.cpp
 * @brief This class implements a placeholder for any notification panel.
 *
 * $LicenseInfo:firstyear=2000&license=viewergpl$
 * 
 * Copyright (c) 2000-2009, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at
 * http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h" // must be first include

#include "lltoast.h"

#include "llbutton.h"
#include "llfocusmgr.h"
#include "llnotifications.h"
#include "llviewercontrol.h"

using namespace LLNotificationsUI;

/*virtual*/
BOOL LLToastLifeTimer::tick()
{
	if (mEventTimer.hasExpired())
	{
		mToast->expire();
	}
	return FALSE;
}

//--------------------------------------------------------------------------
LLToast::Params::Params() 
:	can_fade("can_fade", true),
	can_be_stored("can_be_stored", true),
	is_modal("is_modal", false),
	is_tip("is_tip", false),
	enable_hide_btn("enable_hide_btn", true),
	force_show("force_show", false),
	force_store("force_store", false),
	fading_time_secs("fading_time_secs", gSavedSettings.getS32("ToastFadingTime")),
	lifetime_secs("lifetime_secs", gSavedSettings.getS32("NotificationToastLifeTime"))
{};

LLToast::LLToast(const LLToast::Params& p) 
:	LLModalDialog(LLSD(), p.is_modal),
	mPanel(p.panel), 
	mToastLifetime(p.lifetime_secs),
	mToastFadingTime(p.fading_time_secs),
	mNotificationID(p.notif_id),  
	mSessionID(p.session_id),
	mCanFade(p.can_fade),
	mCanBeStored(p.can_be_stored),
	mHideBtnEnabled(p.enable_hide_btn),
	mHideBtn(NULL),
	mNotification(p.notification),
	mIsHidden(false),
	mHideBtnPressed(false),
	mIsTip(p.is_tip),
	mWrapperPanel(NULL)
{
	mTimer.reset(new LLToastLifeTimer(this, p.lifetime_secs));

	buildFromFile("panel_toast.xml", NULL);

	setCanDrag(FALSE);

	mWrapperPanel = getChild<LLPanel>("wrapper_panel");
	mWrapperPanel->setMouseEnterCallback(boost::bind(&LLToast::onToastMouseEnter, this));
	mWrapperPanel->setMouseLeaveCallback(boost::bind(&LLToast::onToastMouseLeave, this));

	if(mPanel)
	{
		insertPanel(mPanel);
	}

	if(mHideBtnEnabled)
	{
		mHideBtn = getChild<LLButton>("hide_btn");
		mHideBtn->setClickedCallback(boost::bind(&LLToast::hide,this));
		mHideBtn->setMouseEnterCallback(boost::bind(&LLToast::onToastMouseEnter, this));
		mHideBtn->setMouseLeaveCallback(boost::bind(&LLToast::onToastMouseLeave, this));
	}

	// init callbacks if present
	if(!p.on_delete_toast().empty())
		mOnDeleteToastSignal.connect(p.on_delete_toast());

	if(!p.on_mouse_enter().empty())
		mOnMouseEnterSignal.connect(p.on_mouse_enter());
}

void LLToast::reshape(S32 width, S32 height, BOOL called_from_parent)
{
	// We shouldn't  use reshape from LLModalDialog since it changes toasts position.
	// Toasts position should be controlled only by toast screen channel, see LLScreenChannelBase.
	// see EXT-8044
	LLFloater::reshape(width, height, called_from_parent);
}

//--------------------------------------------------------------------------
BOOL LLToast::postBuild()
{
	if(!mCanFade)
	{
		mTimer->stop();
	}

	return TRUE;
}

//--------------------------------------------------------------------------
void LLToast::setHideButtonEnabled(bool enabled)
{
	if(mHideBtn)
		mHideBtn->setEnabled(enabled);
}

//--------------------------------------------------------------------------
LLToast::~LLToast()
{	
	mOnToastDestroyedSignal(this);
}

//--------------------------------------------------------------------------
void LLToast::hide()
{
	setVisible(FALSE);
	mTimer->stop();
	mIsHidden = true;
	mOnFadeSignal(this); 
}

void LLToast::onFocusLost()
{
	if(mWrapperPanel && !isBackgroundVisible())
	{
		// Lets make wrapper panel behave like a floater
		setBackgroundOpaque(FALSE);
	}
}

void LLToast::onFocusReceived()
{
	if(mWrapperPanel && !isBackgroundVisible())
	{
		// Lets make wrapper panel behave like a floater
		setBackgroundOpaque(TRUE);
	}
}

S32 LLToast::getTopPad()
{
	if(mWrapperPanel)
	{
		return getRect().getHeight() - mWrapperPanel->getRect().getHeight();
	}
	return 0;
}

S32 LLToast::getRightPad()
{
	if(mWrapperPanel)
	{
		return getRect().getWidth() - mWrapperPanel->getRect().getWidth();
	}
	return 0;
}

//--------------------------------------------------------------------------
void LLToast::setCanFade(bool can_fade) 
{ 
	mCanFade = can_fade; 
	if(!mCanFade)
		mTimer->stop();
}

//--------------------------------------------------------------------------
void LLToast::expire()
{
	// if toast has fade property - hide it
	if(mCanFade)
	{
		hide();
	}
}

//--------------------------------------------------------------------------

void LLToast::reshapeToPanel()
{
	LLPanel* panel = getPanel();
	if(!panel)
		return;

	LLRect panel_rect = panel->getRect();

	panel_rect.setLeftTopAndSize(0, panel_rect.getHeight(), panel_rect.getWidth(), panel_rect.getHeight());
	panel->setShape(panel_rect);
	
	LLRect toast_rect = getRect();

	toast_rect.setLeftTopAndSize(toast_rect.mLeft, toast_rect.mTop,
		panel_rect.getWidth() + getRightPad(), panel_rect.getHeight() + getTopPad());
	setShape(toast_rect);
}

void LLToast::insertPanel(LLPanel* panel)
{
	mWrapperPanel->addChild(panel);	
	reshapeToPanel();
}

//--------------------------------------------------------------------------
void LLToast::draw()
{
	LLFloater::draw();

	if(!isBackgroundVisible())
	{
		// Floater background is invisible, lets make wrapper panel look like a 
		// floater - draw shadow.
		drawShadow(mWrapperPanel);

		// Shadow will probably overlap close button, lets redraw the button
		if(mHideBtn)
		{
			drawChild(mHideBtn);
		}
	}

	// if timer started and remaining time <= fading time
	if (mTimer->getStarted() && (mToastLifetime
			- mTimer->getEventTimer().getElapsedTimeF32()) <= mToastFadingTime)
	{
		setBackgroundOpaque(FALSE);
	}
}

//--------------------------------------------------------------------------
void LLToast::setVisible(BOOL show)
{
	if(mIsHidden)
	{
		// this toast is invisible after fade until its ScreenChannel will allow it
		//
		// (EXT-1849) according to this bug a toast can be resurrected from
		// invisible state if it faded during a teleportation
		// then it fades a second time and causes a crash
		return;
	}

	if(show)
	{
		setBackgroundOpaque(TRUE);
		if(!mTimer->getStarted() && mCanFade)
		{
			mTimer->start();
		}
		if (!getVisible())
		{
			LLModalDialog::setFrontmost(FALSE);
		}
	}
	else
	{
		//hide "hide" button in case toast was hidden without mouse_leave
		if(mHideBtn)
			mHideBtn->setVisible(show);
	}
	LLFloater::setVisible(show);
	if(mPanel)
	{
		if(!mPanel->isDead())
		{
			mPanel->setVisible(show);
		}
	}
}

void LLToast::onToastMouseEnter()
{
	LLRect panel_rc = mWrapperPanel->calcScreenRect();
	LLRect button_rc;
	if(mHideBtn)
	{
		button_rc = mHideBtn->calcScreenRect();
	}

	S32 x, y;
	LLUI::getMousePositionScreen(&x, &y);

	if(panel_rc.pointInRect(x, y) || button_rc.pointInRect(x, y))
	{
		mOnToastHoverSignal(this, MOUSE_ENTER);

		setBackgroundOpaque(TRUE);

		//toasts fading is management by Screen Channel

		sendChildToFront(mHideBtn);
		if(mHideBtn && mHideBtn->getEnabled())
		{
			mHideBtn->setVisible(TRUE);
		}
		mOnMouseEnterSignal(this);
		mToastMouseEnterSignal(this, getValue());
	}
}

void LLToast::onToastMouseLeave()
{
	LLRect panel_rc = mWrapperPanel->calcScreenRect();
	LLRect button_rc;
	if(mHideBtn)
	{
		button_rc = mHideBtn->calcScreenRect();
	}

	S32 x, y;
	LLUI::getMousePositionScreen(&x, &y);

	if( !panel_rc.pointInRect(x, y) && !button_rc.pointInRect(x, y))
	{
		mOnToastHoverSignal(this, MOUSE_LEAVE);

		//toasts fading is management by Screen Channel

		if(mHideBtn && mHideBtn->getEnabled())
		{
			if( mHideBtnPressed )
			{
				mHideBtnPressed = false;
				return;
			}
			mHideBtn->setVisible(FALSE);		
		}
		mToastMouseLeaveSignal(this, getValue());
	}
}

void LLToast::setBackgroundOpaque(BOOL b)
{
	if(mWrapperPanel && !isBackgroundVisible())
	{
		mWrapperPanel->setBackgroundOpaque(b);
	}
	else
	{
		LLModalDialog::setBackgroundOpaque(b);
	}
}

void LLNotificationsUI::LLToast::stopFading()
{
	if(mCanFade)
	{
		stopTimer();
	}
}

void LLNotificationsUI::LLToast::startFading()
{
	if(mCanFade)
	{
		resetTimer();
	}
}

bool LLToast::isHovered()
{
	S32 x, y;
	LLUI::getMousePositionScreen(&x, &y);
	return mWrapperPanel->calcScreenRect().pointInRect(x, y);
}

//--------------------------------------------------------------------------

BOOL LLToast::handleMouseDown(S32 x, S32 y, MASK mask)
{
	if(mHideBtn && mHideBtn->getEnabled())
	{
		mHideBtnPressed = mHideBtn->getRect().pointInRect(x, y);
	}

	return LLFloater::handleMouseDown(x, y, mask);
}

//--------------------------------------------------------------------------
bool LLToast::isNotificationValid()
{
	if(mNotification)
	{
		return !mNotification->isCancelled();
	}
	return false;
}

//--------------------------------------------------------------------------

S32	LLToast::notifyParent(const LLSD& info)
{
	if (info.has("action") && "hide_toast" == info["action"].asString())
	{
		hide();
		return 1;
	}

	return LLModalDialog::notifyParent(info);
}