x11_window.cpp

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/*****************************************************************************
 * x11_window.cpp: X11 implementation of the Window class
 *****************************************************************************
 * Copyright (C) 2003 VideoLAN
 * $Id: x11_window.cpp,v 1.30 2003/10/22 19:12:56 ipkiss Exp $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111,
 * USA.
 *****************************************************************************/

#ifdef X11_SKINS

//--- GENERAL ---------------------------------------------------------------
//#include <math.h>

//--- VLC -------------------------------------------------------------------
#include <vlc/intf.h>

//--- X11 -------------------------------------------------------------------
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/extensions/shape.h>

//--- SKIN ------------------------------------------------------------------
#include "../os_api.h"
#include "../src/anchor.h"
#include "../controls/generic.h"
#include "../src/window.h"
#include "../os_window.h"
#include "../src/event.h"
#include "../os_event.h"
#include "../src/graphics.h"
#include "../os_graphics.h"
#include "../src/skin_common.h"
#include "../src/theme.h"
#include "../os_theme.h"
#include "x11_timer.h"


static bool ToolTipCallback( void *data );
static void DrawToolTipText( tooltip_t *tooltip );


//---------------------------------------------------------------------------
// Skinable Window
//---------------------------------------------------------------------------
X11Window::X11Window( intf_thread_t *p_intf, Window wnd, int x, int y,
    bool visible, int transition, int normalalpha, int movealpha,
    bool dragdrop, bool playondrop, string name )
    : SkinWindow( p_intf, x, y, visible, transition, normalalpha, movealpha,
              dragdrop  )
{
    // Set handles
    Wnd         = wnd;
    display     = p_intf->p_sys->display;
    int screen  = DefaultScreen( display );
    Name        = name;
    LButtonDown = false;
    RButtonDown = false;

    // Creation of a graphic context that doesn't generate a GraphicsExpose
    // event when using functions like XCopyArea
    XGCValues gcVal;
    gcVal.graphics_exposures = False;
    XLOCK;
    Gc = XCreateGC( display, wnd, GCGraphicsExposures, &gcVal );
    XUNLOCK;

    // Removing fading effect
    Transition  = 0;

    if( DragDrop )
    {
        // register the listview as a drop target
        DropObject = new X11DropObject( p_intf, Wnd, playondrop );

        Atom xdndAtom = XInternAtom( display, "XdndAware", False );
        char xdndVersion = 4;
        XLOCK;
        XChangeProperty( display, wnd, xdndAtom, XA_ATOM, 32,
                         PropModeReplace, (unsigned char *)&xdndVersion, 1);
        XUNLOCK;
    }

    // Associate vlc icon to the window
    XLOCK;
    XWMHints *hints = XGetWMHints( display, Wnd );
    if( !hints)
    {
        hints = XAllocWMHints();
    }
    if( p_intf->p_sys->iconPixmap != None )
    {
        hints->icon_pixmap = p_intf->p_sys->iconPixmap;
        hints->flags |= IconPixmapHint;
    }
    if( p_intf->p_sys->iconMask != None )
    {
        hints->icon_mask = p_intf->p_sys->iconMask;
        hints->flags |= IconMaskHint;
    }
    XSetWMHints( display, Wnd, hints );
    XFree( hints );
    XUNLOCK;

    // Create Tool Tip window
    XColor color;
    color.red = 0xffff;
    color.green = 0xffff;
    color.blue = 0xa000;
    Colormap cm = DefaultColormap( display, screen );
    Window root = DefaultRootWindow( display );

    XLOCK;
    XAllocColor( display, cm, &color );
    XSetWindowAttributes attr;
    attr.background_pixel = color.pixel;
    attr.override_redirect = True;
    ToolTip.window = XCreateWindow( display, root, 0, 0, 1, 1, 1, 0,
                                    InputOutput, CopyFromParent,
                                    CWBackPixel|CWOverrideRedirect, &attr );
    ToolTip.font = XLoadFont( display,
                              "-*-helvetica-bold-r-*-*-*-80-*-*-*-*-*-*" );
    gcVal.font = ToolTip.font;
    gcVal.foreground = 0;
    gcVal.background = color.pixel;
    ToolTip.gc = XCreateGC( display, ToolTip.window, 
                            GCBackground|GCForeground|GCFont, &gcVal );
    XUNLOCK;

    ToolTip.display = display;
    X11Timer *timer = new X11Timer( p_intf, 500000, ToolTipCallback, &ToolTip );
    ToolTip.p_intf = p_intf;
    ToolTip.timer = timer;
    ToolTip.active = False;

    // Double-click handling
    ClickedX = 0;
    ClickedY = 0;
    ClickedTime = 0;
    // TODO: can be retrieved somewhere ?
    DblClickDelay = 400;
}
//---------------------------------------------------------------------------
X11Window::~X11Window()
{
    if( DragDrop )
    {
        delete DropObject;
    }
    delete ToolTip.timer;
    XLOCK;
    XFreeGC( display, ToolTip.gc );
    XFreeGC( display, Gc );
    XDestroyWindow( display, ToolTip.window );
    XDestroyWindow( display, Wnd );
    XUNLOCK;
}
//---------------------------------------------------------------------------
void X11Window::ToggleOnTop()
{
    XEvent ev;
    ev.type = ClientMessage;
    ev.xclient.display = display;
    ev.xclient.window = Wnd;
    ev.xclient.serial = 0;
    ev.xclient.send_event = True;
    ev.xclient.message_type = XInternAtom( display, "_NET_WM_STATE", True );
    ev.xclient.format = 32;
    ev.xclient.data.l[1] = XInternAtom( display, "_NET_WM_STATE_ABOVE", False);
    ev.xclient.data.l[2] = 0;
    ev.xclient.data.l[3] = 0;
    ev.xclient.data.l[4] = 0;

    if( !p_intf->p_sys->b_on_top )
    {
        // Set the window on top
        ev.xclient.data.l[0] = 1; // _NET_WM_STATE_ADD
    }
    else
    {
        // Set the window not on top
        ev.xclient.data.l[0] = 0; // _NET_WM_STATE_REMOVE
    }

    XLOCK;
    XSendEvent( display, DefaultRootWindow( display ), False,
                SubstructureRedirectMask | SubstructureNotifyMask, &ev );
    XUNLOCK;

    /* For KDE */
    ev.xclient.data.l[1] = XInternAtom( display, "_NET_WM_STATE_STAYS_ON_TOP",
                                        False);
    XLOCK;
    XSendEvent( display, DefaultRootWindow( display ), False,
                SubstructureRedirectMask | SubstructureNotifyMask, &ev );
    XUNLOCK;
}
//---------------------------------------------------------------------------
void X11Window::OSShow( bool show )
{
    XLOCK;
    XResizeWindow( display, Wnd, 1, 1 ); // Avoid flicker
    XUNLOCK;

    if( show )
    {
        // We do the call to XShapeCombineRegion() here because the window
        // must be unmapped for this to work.
        Drawable drawable = (( X11Graphics* )Image )->GetImage();

        XLOCK;
        XImage *image = XGetImage( display, drawable, 0, 0, Width, Height, 
                                   AllPlanes, ZPixmap );
        if( image )
        {
            // Mask for transparency
            Region region = XCreateRegion();
            for( int line = 0; line < Height; line++ )
            {
                int start = 0, end = 0;
                while( start < Width )
                {
                    while( start < Width && XGetPixel( image, start, line )
                           == 0 )
                    {
                        start++;
                    }
                    end = start;
                    while( end < Width && XGetPixel( image, end, line ) != 0)
                    {
                        end++;
                    }
                    XRectangle rect;
                    rect.x = start;
                    rect.y = line;
                    rect.width = end - start + 1;
                    rect.height = 1;
                    Region newRegion = XCreateRegion();
                    XUnionRectWithRegion( &rect, region, newRegion );
                    XDestroyRegion( region );
                    region = newRegion;
                    start = end + 1;
                }
            }
            XDestroyImage( image );

            XShapeCombineRegion( display, Wnd, ShapeBounding, 0, 0, region,
                                 ShapeSet );
            XDestroyRegion( region );

        }
        else
        {
            msg_Err( p_intf, "X11Window::OSShow XShapeCombineRegion() failed");
        }

        XMapWindow( display, Wnd );
        XMoveResizeWindow( display, Wnd, Left, Top, Width, Height );
        XUNLOCK;
    }
    else
    {
        XLOCK;
        XUnmapWindow( display, Wnd );
        XUNLOCK;
    }
}
//---------------------------------------------------------------------------
bool X11Window::ProcessOSEvent( Event *evt )
{
    unsigned int msg = evt->GetMessage();
    //unsigned int p1  = evt->GetParam1();
    int          p2  = evt->GetParam2();
    int          time;
    int          posX, posY;
    string       type;
    int          button;

    switch( msg )
    {
        case Expose:
            RefreshFromImage( 0, 0, Width, Height );
            return true;

        case MotionNotify:
            if( LButtonDown )
                MouseMove( (int)( (XMotionEvent *)p2 )->x,
                           (int)( (XMotionEvent *)p2 )->y, 1 );
            else if( RButtonDown )
                MouseMove( (int)( (XMotionEvent *)p2 )->x,
                           (int)( (XMotionEvent *)p2 )->y, 2 );
            else
                MouseMove( (int)( (XMotionEvent *)p2 )->x,
                           (int)( (XMotionEvent *)p2 )->y, 0 );
            return true;