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28 #include "platform/Widget.h"
31 #include "wtf/Assertions.h"
37 , m_selfVisible(false)
38 , m_parentVisible(false)
49 void Widget::trace(Visitor* visitor)
51 visitor->trace(m_parent);
54 void Widget::setParent(Widget* widget)
56 ASSERT(!widget || !m_parent);
57 if (!widget || !widget->isVisible())
58 setParentVisible(false);
60 if (widget && widget->isVisible())
61 setParentVisible(true);
64 Widget* Widget::root() const
66 const Widget* top = this;
69 if (top->isFrameView())
70 return const_cast<Widget*>(static_cast<const Widget*>(top));
74 IntRect Widget::convertFromContainingWindow(const IntRect& windowRect) const
76 if (const Widget* parentWidget = parent()) {
77 IntRect parentRect = parentWidget->convertFromContainingWindow(windowRect);
78 return convertFromContainingView(parentRect);
83 IntRect Widget::convertToContainingWindow(const IntRect& localRect) const
85 if (const Widget* parentWidget = parent()) {
86 IntRect parentRect = convertToContainingView(localRect);
87 return parentWidget->convertToContainingWindow(parentRect);
92 IntPoint Widget::convertFromContainingWindow(const IntPoint& windowPoint) const
94 if (const Widget* parentWidget = parent()) {
95 IntPoint parentPoint = parentWidget->convertFromContainingWindow(windowPoint);
96 return convertFromContainingView(parentPoint);
101 FloatPoint Widget::convertFromContainingWindow(const FloatPoint& windowPoint) const
103 // Widgets / windows are required to be IntPoint aligned, but we may need to convert
104 // FloatPoint values within them (eg. for event co-ordinates).
105 IntPoint flooredPoint = flooredIntPoint(windowPoint);
106 FloatPoint parentPoint = this->convertFromContainingWindow(flooredPoint);
107 FloatSize windowFraction = windowPoint - flooredPoint;
108 // Use linear interpolation handle any fractional value (eg. for iframes subject to a transform
109 // beyond just a simple translation).
110 // FIXME: Add FloatPoint variants of all co-ordinate space conversion APIs.
111 if (!windowFraction.isEmpty()) {
112 const int kFactor = 1000;
113 IntPoint parentLineEnd = this->convertFromContainingWindow(flooredPoint + roundedIntSize(windowFraction.scaledBy(kFactor)));
114 FloatSize parentFraction = (parentLineEnd - parentPoint).scaledBy(1.0f / kFactor);
115 parentPoint.move(parentFraction);
120 IntPoint Widget::convertToContainingWindow(const IntPoint& localPoint) const
122 if (const Widget* parentWidget = parent()) {
123 IntPoint parentPoint = convertToContainingView(localPoint);
124 return parentWidget->convertToContainingWindow(parentPoint);
129 IntRect Widget::convertToContainingView(const IntRect& localRect) const
131 if (const Widget* parentWidget = parent()) {
132 IntRect parentRect(localRect);
133 parentRect.setLocation(parentWidget->convertChildToSelf(this, localRect.location()));
139 IntRect Widget::convertFromContainingView(const IntRect& parentRect) const
141 if (const Widget* parentWidget = parent()) {
142 IntRect localRect = parentRect;
143 localRect.setLocation(parentWidget->convertSelfToChild(this, localRect.location()));
150 IntPoint Widget::convertToContainingView(const IntPoint& localPoint) const
152 if (const Widget* parentWidget = parent())
153 return parentWidget->convertChildToSelf(this, localPoint);
158 IntPoint Widget::convertFromContainingView(const IntPoint& parentPoint) const
160 if (const Widget* parentWidget = parent())
161 return parentWidget->convertSelfToChild(this, parentPoint);
166 IntPoint Widget::convertChildToSelf(const Widget*, const IntPoint& point) const
171 IntPoint Widget::convertSelfToChild(const Widget*, const IntPoint& point) const