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      1 /*
      2  * Copyright (C) 2006 Michael Emmel mike.emmel (at) gmail.com
      3  * Copyright (C) 2007, 2009 Holger Hans Peter Freyther
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "config.h"
     29 #include "Widget.h"
     30 
     31 #include "Cursor.h"
     32 #include "FrameView.h"
     33 #include "GraphicsContext.h"
     34 #include "HostWindow.h"
     35 #include "IntRect.h"
     36 #include "RenderObject.h"
     37 
     38 #include <gdk/gdk.h>
     39 #include <gtk/gtk.h>
     40 
     41 namespace WebCore {
     42 
     43 static GdkCursor* lastSetCursor;
     44 
     45 Widget::Widget(PlatformWidget widget)
     46 {
     47     init(widget);
     48 }
     49 
     50 Widget::~Widget()
     51 {
     52     ASSERT(!parent());
     53     releasePlatformWidget();
     54 }
     55 
     56 void Widget::setFocus()
     57 {
     58     gtk_widget_grab_focus(platformWidget() ? platformWidget() : GTK_WIDGET(root()->hostWindow()->platformPageClient()));
     59 }
     60 
     61 static GdkDrawable* gdkDrawable(PlatformWidget widget)
     62 {
     63     return widget ? widget->window : 0;
     64 }
     65 
     66 void Widget::setCursor(const Cursor& cursor)
     67 {
     68     GdkCursor* platformCursor = cursor.impl();
     69 
     70     // http://bugs.webkit.org/show_bug.cgi?id=16388
     71     // [GTK] Widget::setCursor() gets called frequently
     72     //
     73     // gdk_window_set_cursor() in certain GDK backends seems to be an
     74     // expensive operation, so avoid it if possible.
     75 
     76     if (platformCursor == lastSetCursor)
     77         return;
     78 
     79     gdk_window_set_cursor(gdkDrawable(platformWidget()) ? GDK_WINDOW(gdkDrawable(platformWidget())) : GTK_WIDGET(root()->hostWindow()->platformPageClient())->window, platformCursor);
     80     lastSetCursor = platformCursor;
     81 }
     82 
     83 void Widget::show()
     84 {
     85     if (!platformWidget())
     86          return;
     87     gtk_widget_show(platformWidget());
     88 }
     89 
     90 void Widget::hide()
     91 {
     92     if (!platformWidget())
     93          return;
     94     gtk_widget_hide(platformWidget());
     95 }
     96 
     97 void Widget::paint(GraphicsContext* context, const IntRect& rect)
     98 {
     99 }
    100 
    101 void Widget::setIsSelected(bool isSelected)
    102 {
    103     if (!platformWidget())
    104         return;
    105 
    106     // See if the platformWidget has a webkit-widget-is-selected property
    107     // and set it afterwards.
    108     GParamSpec* spec = g_object_class_find_property(G_OBJECT_GET_CLASS(platformWidget()),
    109                                                     "webkit-widget-is-selected");
    110     if (!spec)
    111         return;
    112 
    113     g_object_set(platformWidget(), "webkit-widget-is-selected", isSelected, NULL);
    114 }
    115 
    116 IntRect Widget::frameRect() const
    117 {
    118     return m_frame;
    119 }
    120 
    121 void Widget::setFrameRect(const IntRect& rect)
    122 {
    123     m_frame = rect;
    124 }
    125 
    126 void Widget::releasePlatformWidget()
    127 {
    128     if (!platformWidget())
    129          return;
    130     g_object_unref(platformWidget());
    131 }
    132 
    133 void Widget::retainPlatformWidget()
    134 {
    135     if (!platformWidget())
    136          return;
    137     g_object_ref_sink(platformWidget());
    138 }
    139 
    140 }
    141