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      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)
    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) && !OS(ANDROID)
    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
    178