/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>

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, see <http://www.gnu.org/licenses/>.
*********************************************************************/

#include "minimizeanimation.h"

namespace KWin
{

KWIN_EFFECT(minimizeanimation, MinimizeAnimationEffect)

MinimizeAnimationEffect::MinimizeAnimationEffect()
{
    mActiveAnimations = 0;
}


void MinimizeAnimationEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{

    QHash< EffectWindow*, TimeLine >::iterator entry = mTimeLineWindows.begin();
    bool erase = false;
    while (entry != mTimeLineWindows.end()) {
        TimeLine &timeline = entry.value();
        if (entry.key()->isMinimized()) {
            timeline.addTime(time);
            erase = (timeline.progress() >= 1.0f);
        } else {
            timeline.removeTime(time);
            erase = (timeline.progress() <= 0.0f);
        }
        if (erase)
            entry = mTimeLineWindows.erase(entry);
        else
            ++entry;
    }

    mActiveAnimations = mTimeLineWindows.count();
    if (mActiveAnimations > 0)
        // We need to mark the screen windows as transformed. Otherwise the
        //  whole screen won't be repainted, resulting in artefacts
        data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;

    effects->prePaintScreen(data, time);
}

void MinimizeAnimationEffect::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time)
{
    // Schedule window for transformation if the animation is still in
    //  progress
    if (mTimeLineWindows.contains(w)) {
        // We'll transform this window
        data.setTransformed();
        w->enablePainting(EffectWindow::PAINT_DISABLED_BY_MINIMIZE);
    }

    effects->prePaintWindow(w, data, time);
}

void MinimizeAnimationEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
    QHash< EffectWindow*, TimeLine >::const_iterator entry = mTimeLineWindows.constFind(w);
    if (entry != mTimeLineWindows.constEnd()) {
        // 0 = not minimized, 1 = fully minimized
        double progress = entry->value();

        QRect geo = w->geometry();
        QRect icon = w->iconGeometry();
        // If there's no icon geometry, minimize to the center of the screen
        if (!icon.isValid())
            icon = QRect(displayWidth() / 2, displayHeight() / 2, 0, 0);

        data.xScale *= interpolate(1.0, icon.width() / (double)geo.width(), progress);
        data.yScale *= interpolate(1.0, icon.height() / (double)geo.height(), progress);
        data.xTranslate = (int)interpolate(data.xTranslate, icon.x() - geo.x(), progress);
        data.yTranslate = (int)interpolate(data.yTranslate, icon.y() - geo.y(), progress);
        data.opacity *= 0.1 + (1 - progress) * 0.9;
    }

    // Call the next effect.
    effects->paintWindow(w, mask, region, data);
}

void MinimizeAnimationEffect::postPaintScreen()
{
    if (mActiveAnimations > 0)
        // Repaint the workspace so that everything would be repainted next time
        effects->addRepaintFull();
    mActiveAnimations = mTimeLineWindows.count();

    // Call the next effect.
    effects->postPaintScreen();
}

void MinimizeAnimationEffect::windowDeleted(EffectWindow* w)
{
    mTimeLineWindows.remove(w);
}

void MinimizeAnimationEffect::windowMinimized(EffectWindow* w)
{
    if (effects->activeFullScreenEffect())
        return;
    TimeLine &timeline = mTimeLineWindows[w];
    timeline.setCurveShape(TimeLine::EaseInCurve);
    timeline.setDuration(animationTime(250));
    timeline.setProgress(0.0f);
}

void MinimizeAnimationEffect::windowUnminimized(EffectWindow* w)
{
    if (effects->activeFullScreenEffect())
        return;
    TimeLine &timeline = mTimeLineWindows[w];
    timeline.setCurveShape(TimeLine::EaseOutCurve);
    timeline.setDuration(animationTime(250));
    timeline.setProgress(1.0f);
}

} // namespace