WebCore/platform/Widget.cpp

   1 /*
   2  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "Widget.h"
  28
  29 #include "IntRect.h"
  30 #include "ScrollView.h"
  31
  32 #include <wtf/Assertions.h>
  33
  34 namespace WebCore {
  35
  36 void Widget::init(PlatformWidget widget)
  37 {
  38     m_parent = 0;
  39     m_selfVisible = false;
  40     m_parentVisible = false;
  41     m_widget = widget;
  42     if (m_widget)
  43         retainPlatformWidget();
  44 }
  45
  46 void Widget::setParent(ScrollView* view)
  47 {
  48     ASSERT(!view || !m_parent);
  49     if (!view || !view->isVisible())
  50         setParentVisible(false);
  51     m_parent = view;
  52     if (view && view->isVisible())
  53         setParentVisible(true);
  54 }
  55
  56 ScrollView* Widget::root() const
  57 {
  58     const Widget* top = this;
  59     while (top->parent())
  60         top = top->parent();
  61     if (top->isFrameView())
  62         return const_cast<ScrollView*>(static_cast<const ScrollView*>(top));
  63     return 0;
  64 }
  65
  66 void Widget::removeFromParent()
  67 {
  68     if (parent())
  69         parent()->removeChild(this);
  70 }
  71
  72 IntRect Widget::convertFromContainingWindow(const IntRect& windowRect) const
  73 {
  74     if (const ScrollView* parentScrollView = parent()) {
  75         IntRect parentRect = parentScrollView->convertFromContainingWindow(windowRect);
  76         return convertFromContainingView(parentRect);
  77     }
  78     return convertFromContainingWindowToRoot(this, windowRect);
  79 }
  80
  81 IntRect Widget::convertToContainingWindow(const IntRect& localRect) const
  82 {
  83     if (const ScrollView* parentScrollView = parent()) {
  84         IntRect parentRect = convertToContainingView(localRect);
  85         return parentScrollView->convertToContainingWindow(parentRect);
  86     }
  87     return convertFromRootToContainingWindow(this, localRect);
  88 }
  89
  90 IntPoint Widget::convertFromContainingWindow(const IntPoint& windowPoint) const
  91 {
  92     if (const ScrollView* parentScrollView = parent()) {
  93         IntPoint parentPoint = parentScrollView->convertFromContainingWindow(windowPoint);
  94         return convertFromContainingView(parentPoint);
  95     }
  96     return convertFromContainingWindowToRoot(this, windowPoint);
  97 }
  98
  99 IntPoint Widget::convertToContainingWindow(const IntPoint& localPoint) const
 100 {
 101     if (const ScrollView* parentScrollView = parent()) {
 102         IntPoint parentPoint = convertToContainingView(localPoint);
 103         return parentScrollView->convertToContainingWindow(parentPoint);
 104     }
 105     return convertFromRootToContainingWindow(this, localPoint);
 106 }
 107
 108 #if !PLATFORM(MAC) || ENABLE(EXPERIMENTAL_SINGLE_VIEW_MODE)
 109 IntRect Widget::convertFromRootToContainingWindow(const Widget*, const IntRect& rect)
 110 {
 111     return rect;
 112 }
 113
 114 IntRect Widget::convertFromContainingWindowToRoot(const Widget*, const IntRect& rect)
 115 {
 116     return rect;
 117 }
 118
 119 IntPoint Widget::convertFromRootToContainingWindow(const Widget*, const IntPoint& point)
 120 {
 121     return point;
 122 }
 123
 124 IntPoint Widget::convertFromContainingWindowToRoot(const Widget*, const IntPoint& point)
 125 {
 126     return point;
 127 }
 128 #endif
 129
 130 #if (!PLATFORM(MAC) && !PLATFORM(GTK)) || ENABLE(EXPERIMENTAL_SINGLE_VIEW_MODE)
 131 void Widget::releasePlatformWidget()
 132 {
 133 }
 134
 135 void Widget::retainPlatformWidget()
 136 {
 137 }
 138 #endif
 139
 140 IntRect Widget::convertToContainingView(const IntRect& localRect) const
 141 {
 142     if (const ScrollView* parentScrollView = parent()) {
 143         IntRect parentRect(localRect);
 144         parentRect.setLocation(parentScrollView->convertChildToSelf(this, localRect.location()));
 145         return parentRect;
 146     }
 147     return localRect;
 148 }
 149
 150 IntRect Widget::convertFromContainingView(const IntRect& parentRect) const
 151 {
 152     if (const ScrollView* parentScrollView = parent()) {
 153         IntRect localRect = parentRect;
 154         localRect.setLocation(parentScrollView->convertSelfToChild(this, localRect.location()));
 155         return localRect;
 156     }
 157
 158     return parentRect;
 159 }
 160
 161 IntPoint Widget::convertToContainingView(const IntPoint& localPoint) const
 162 {
 163     if (const ScrollView* parentScrollView = parent())
 164         return parentScrollView->convertChildToSelf(this, localPoint);
 165
 166     return localPoint;
 167 }
 168
 169 IntPoint Widget::convertFromContainingView(const IntPoint& parentPoint) const
 170 {
 171     if (const ScrollView* parentScrollView = parent())
 172         return parentScrollView->convertSelfToChild(this, parentPoint);
 173
 174     return parentPoint;
 175 }
 176
 177 } // namespace WebCore