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path: root/src/hoverfx.cpp
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#include "hoverfx.h"

COMPIZ_PLUGIN_20090315 (hoverfx, HoverPluginVTable);

/* Returns true if it makes sense for this window to be animated on hover */
bool
HoverWindow::shouldAnimate ()
{
    /* Override Redirect windows are painful */
    if (window->overrideRedirect ())
	return false;
    
    /* Don't do this for panels docks or desktops */
    if (window->wmType () & (CompWindowTypeDockMask | CompWindowTypeDesktopMask))
	return false;
    
    /* Don't do this for invisible windows */
    if (!window->mapNum () || !window->isViewable ())
	return false;
    
    return true;
}
    
    

/* Handle X11 Events, on EnterNotify set the hovered bit,
 * and unset on LeaveNotify
 */

void
HoverScreen::handleEvent (XEvent *event)
{
    switch (event->type)
    {
	case ButtonPress:
	{
	    Window xid = event->xbutton.window;
	    
	    CompWindow *w = screen->findWindow (xid);
	    
	    if (w && HoverWindow::get (w)->shouldAnimate () && HoverWindow::get (w)->mIsHovered)
	    {
		HOVER_WINDOW (w);

		hw->mOldScale = 1.0f;
		hw->mTargetScale = 1.0f;
		hw->mAnimate = false;
		hw->mCurrentScale = 1.0f;
		hw->cWindow->addDamage ();
		
		cScreen->damageScreen ();
	    }
	}
	case EnterNotify:
	{
	    Window xid = event->xcrossing.window;
	    
	    CompWindow *w = screen->findWindow (xid);
	    
	    if (w && HoverWindow::get (w)->shouldAnimate () && !HoverWindow::get (w)->mIsHovered)
	    {
		HOVER_WINDOW (w);

		hw->mAnimate = true;
		hw->mOldScale = hw->mCurrentScale;
		hw->mTargetScale = optionGetScaleFactor ();
		hw->mIsHovered = true;
		
		cScreen->damageScreen ();
	    }
		
	}
	break;
	case LeaveNotify:
	{
	    Window xid = event->xcrossing.window;
	    
	    CompWindow *w= screen->findWindow (xid);
	    
	    if (w && HoverWindow::get (w)->shouldAnimate ())
	    {
		HOVER_WINDOW (w);
		
		hw->mAnimate = true;
		hw->mOldScale = hw->mCurrentScale;
		hw->mTargetScale = 1.0f;
		hw->mIsHovered = false;
		
		cScreen->damageScreen ();
		
	    }
	}
	break;
	default:
	    break;
    }
    
    screen->handleEvent (event);
}

/* Before painting the screen, determine how much time has lapsed and then
 * increment animation time on windows
 */

void
HoverScreen::preparePaint (int ms)
{
    foreach (CompWindow *w, screen->windows ())
    {
	HOVER_WINDOW (w);
	
	if (hw->mAnimate)
	{
	    float 	chunk = ms;
	    float 	inc;
	    
	    
	    inc = chunk * (hw->mTargetScale - hw->mOldScale);
	    if (hw->mCurrentScale + inc <= hw->mTargetScale)
		hw->mCurrentScale += inc;
	    else
	    {
		hw->mCurrentScale = hw->mTargetScale;
		hw->mAnimate = false;
	    }
	}
    }

    cScreen->preparePaint (ms);
}

bool
HoverScreen::glPaintOutput (const GLScreenPaintAttrib &attrib,
			    const GLMatrix	      &transform,
			    const CompRegion	      &region,
			    CompOutput		      *output,
			    unsigned int	      mask)
{
    foreach (CompWindow *w, screen->windows ())
	if (HoverWindow::get (w)->mIsHovered)
	    mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS_MASK;
    
    return gScreen->glPaintOutput (attrib, transform, region, output, mask);
    
}

bool
HoverWindow::glPaint (const GLWindowPaintAttrib &attrib,
		      const GLMatrix		&transform,
		      const CompRegion		&region,
		      unsigned int		mask)
{
    if (mIsHovered)
    {
	GLMatrix wTransform (transform);
	GLWindowPaintAttrib wAttrib (attrib);
	
	wTransform.translate (window->inputRect ().centerX (),
			      window->inputRect ().centerY (),
			      0.0f);
	wTransform.scale (mCurrentScale, mCurrentScale, 1.0f);
	wTransform.translate (-window->inputRect ().centerX (),
			      -window->inputRect ().centerY (),
			      0.0f);
	
	mask |= PAINT_WINDOW_TRANSFORMED_MASK;
	
	
	return gWindow->glPaint (attrib, wTransform, region, mask);
    }
    
    return gWindow->glPaint (attrib, transform, region, mask);
}

void
HoverScreen::donePaint ()
{
    foreach (CompWindow *w, screen->windows ())
    {
	if (HoverWindow::get (w)->mAnimate || HoverWindow::get (w)->mIsHovered)
	    CompositeWindow::get (w)->addDamage ();
    }
}

bool
HoverWindow::damageRect (bool	initial,
			 CompRect &rect)
{
    bool status = false;
    
    if (mCurrentScale != 1.0f)
    {
	cWindow->damageTransformedRect (mCurrentScale, mCurrentScale,
					rect.centerX (), rect.centerY (), rect);
	status = true;
    }
    
    status |= cWindow->damageRect (initial, rect);
    
    return status;
}

HoverWindow::HoverWindow (CompWindow *w) :
    PluginClassHandler <HoverWindow, CompWindow> (w),
    window (w),
    cWindow (CompositeWindow::get (w)),
    gWindow (GLWindow::get (w)),
    mIsHovered (false),
    mAnimate (false),
    mOldScale (1.0f),
    mCurrentScale (1.0f),
    mTargetScale (1.0f)
{
    CompositeWindowInterface::setHandler (cWindow);
    GLWindowInterface::setHandler (gWindow);
}

HoverScreen::HoverScreen (CompScreen *s) :
    PluginClassHandler <HoverScreen, CompScreen> (s),
    cScreen (CompositeScreen::get (screen)),
    gScreen (GLScreen::get (screen))
{
    ScreenInterface::setHandler (screen);
    CompositeScreenInterface::setHandler (cScreen);
    GLScreenInterface::setHandler (gScreen);
}

bool
HoverPluginVTable::init ()
{
    if (!CompPlugin::checkPluginABI ("core", CORE_ABIVERSION) ||
	!CompPlugin::checkPluginABI ("composite", COMPIZ_COMPOSITE_ABI) ||
	!CompPlugin::checkPluginABI ("opengl", COMPIZ_OPENGL_ABI))
	return false;
    
    return true;
}