1 /*
2 * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2013 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "platform/Widget.h"
29
30
31 #include "wtf/Assertions.h"
32
33 namespace blink {
34
Widget()35 Widget::Widget()
36 : m_parent(0)
37 , m_selfVisible(false)
38 , m_parentVisible(false)
39 {
40 }
41
~Widget()42 Widget::~Widget()
43 {
44 ASSERT(!parent());
45 }
46
setParent(Widget * widget)47 void Widget::setParent(Widget* widget)
48 {
49 ASSERT(!widget || !m_parent);
50 if (!widget || !widget->isVisible())
51 setParentVisible(false);
52 m_parent = widget;
53 if (widget && widget->isVisible())
54 setParentVisible(true);
55 }
56
root() const57 Widget* Widget::root() const
58 {
59 const Widget* top = this;
60 while (top->parent())
61 top = top->parent();
62 if (top->isFrameView())
63 return const_cast<Widget*>(static_cast<const Widget*>(top));
64 return 0;
65 }
66
convertFromContainingWindow(const IntRect & windowRect) const67 IntRect Widget::convertFromContainingWindow(const IntRect& windowRect) const
68 {
69 if (const Widget* parentWidget = parent()) {
70 IntRect parentRect = parentWidget->convertFromContainingWindow(windowRect);
71 return convertFromContainingView(parentRect);
72 }
73 return windowRect;
74 }
75
convertToContainingWindow(const IntRect & localRect) const76 IntRect Widget::convertToContainingWindow(const IntRect& localRect) const
77 {
78 if (const Widget* parentWidget = parent()) {
79 IntRect parentRect = convertToContainingView(localRect);
80 return parentWidget->convertToContainingWindow(parentRect);
81 }
82 return localRect;
83 }
84
convertFromContainingWindow(const IntPoint & windowPoint) const85 IntPoint Widget::convertFromContainingWindow(const IntPoint& windowPoint) const
86 {
87 if (const Widget* parentWidget = parent()) {
88 IntPoint parentPoint = parentWidget->convertFromContainingWindow(windowPoint);
89 return convertFromContainingView(parentPoint);
90 }
91 return windowPoint;
92 }
93
convertFromContainingWindow(const FloatPoint & windowPoint) const94 FloatPoint Widget::convertFromContainingWindow(const FloatPoint& windowPoint) const
95 {
96 // Widgets / windows are required to be IntPoint aligned, but we may need to convert
97 // FloatPoint values within them (eg. for event co-ordinates).
98 IntPoint flooredPoint = flooredIntPoint(windowPoint);
99 FloatPoint parentPoint = this->convertFromContainingWindow(flooredPoint);
100 FloatSize windowFraction = windowPoint - flooredPoint;
101 // Use linear interpolation handle any fractional value (eg. for iframes subject to a transform
102 // beyond just a simple translation).
103 // FIXME: Add FloatPoint variants of all co-ordinate space conversion APIs.
104 if (!windowFraction.isEmpty()) {
105 const int kFactor = 1000;
106 IntPoint parentLineEnd = this->convertFromContainingWindow(flooredPoint + roundedIntSize(windowFraction.scaledBy(kFactor)));
107 FloatSize parentFraction = (parentLineEnd - parentPoint).scaledBy(1.0f / kFactor);
108 parentPoint.move(parentFraction);
109 }
110 return parentPoint;
111 }
112
convertToContainingWindow(const IntPoint & localPoint) const113 IntPoint Widget::convertToContainingWindow(const IntPoint& localPoint) const
114 {
115 if (const Widget* parentWidget = parent()) {
116 IntPoint parentPoint = convertToContainingView(localPoint);
117 return parentWidget->convertToContainingWindow(parentPoint);
118 }
119 return localPoint;
120 }
121
convertToContainingView(const IntRect & localRect) const122 IntRect Widget::convertToContainingView(const IntRect& localRect) const
123 {
124 if (const Widget* parentWidget = parent()) {
125 IntRect parentRect(localRect);
126 parentRect.setLocation(parentWidget->convertChildToSelf(this, localRect.location()));
127 return parentRect;
128 }
129 return localRect;
130 }
131
convertFromContainingView(const IntRect & parentRect) const132 IntRect Widget::convertFromContainingView(const IntRect& parentRect) const
133 {
134 if (const Widget* parentWidget = parent()) {
135 IntRect localRect = parentRect;
136 localRect.setLocation(parentWidget->convertSelfToChild(this, localRect.location()));
137 return localRect;
138 }
139
140 return parentRect;
141 }
142
convertToContainingView(const IntPoint & localPoint) const143 IntPoint Widget::convertToContainingView(const IntPoint& localPoint) const
144 {
145 if (const Widget* parentWidget = parent())
146 return parentWidget->convertChildToSelf(this, localPoint);
147
148 return localPoint;
149 }
150
convertFromContainingView(const IntPoint & parentPoint) const151 IntPoint Widget::convertFromContainingView(const IntPoint& parentPoint) const
152 {
153 if (const Widget* parentWidget = parent())
154 return parentWidget->convertSelfToChild(this, parentPoint);
155
156 return parentPoint;
157 }
158
convertChildToSelf(const Widget *,const IntPoint & point) const159 IntPoint Widget::convertChildToSelf(const Widget*, const IntPoint& point) const
160 {
161 return point;
162 }
163
convertSelfToChild(const Widget *,const IntPoint & point) const164 IntPoint Widget::convertSelfToChild(const Widget*, const IntPoint& point) const
165 {
166 return point;
167 }
168
169 } // namespace blink
170