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/*
* Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "platform/Widget.h"
#include "wtf/Assertions.h"
namespace blink {
Widget::Widget()
: m_parent(nullptr), m_selfVisible(false), m_parentVisible(false) {}
Widget::~Widget() {}
DEFINE_TRACE(Widget) {
visitor->trace(m_parent);
}
void Widget::setParent(Widget* widget) {
ASSERT(!widget || !m_parent);
if (!widget || !widget->isVisible())
setParentVisible(false);
m_parent = widget;
if (widget && widget->isVisible())
setParentVisible(true);
}
Widget* Widget::root() const {
const Widget* top = this;
while (top->parent())
top = top->parent();
if (top->isFrameView())
return const_cast<Widget*>(static_cast<const Widget*>(top));
return 0;
}
IntRect Widget::convertFromRootFrame(const IntRect& rectInRootFrame) const {
if (const Widget* parentWidget = parent()) {
IntRect parentRect = parentWidget->convertFromRootFrame(rectInRootFrame);
return convertFromContainingWidget(parentRect);
}
return rectInRootFrame;
}
IntRect Widget::convertToRootFrame(const IntRect& localRect) const {
if (const Widget* parentWidget = parent()) {
IntRect parentRect = convertToContainingWidget(localRect);
return parentWidget->convertToRootFrame(parentRect);
}
return localRect;
}
IntPoint Widget::convertFromRootFrame(const IntPoint& pointInRootFrame) const {
if (const Widget* parentWidget = parent()) {
IntPoint parentPoint = parentWidget->convertFromRootFrame(pointInRootFrame);
return convertFromContainingWidget(parentPoint);
}
return pointInRootFrame;
}
FloatPoint Widget::convertFromRootFrame(
const FloatPoint& pointInRootFrame) const {
// Widgets / windows are required to be IntPoint aligned, but we may need to
// convert FloatPoint values within them (eg. for event co-ordinates).
IntPoint flooredPoint = flooredIntPoint(pointInRootFrame);
FloatPoint parentPoint = this->convertFromRootFrame(flooredPoint);
FloatSize windowFraction = pointInRootFrame - flooredPoint;
// Use linear interpolation handle any fractional value (eg. for iframes
// subject to a transform beyond just a simple translation).
// FIXME: Add FloatPoint variants of all co-ordinate space conversion APIs.
if (!windowFraction.isEmpty()) {
const int kFactor = 1000;
IntPoint parentLineEnd = this->convertFromRootFrame(
flooredPoint + roundedIntSize(windowFraction.scaledBy(kFactor)));
FloatSize parentFraction =
(parentLineEnd - parentPoint).scaledBy(1.0f / kFactor);
parentPoint.move(parentFraction);
}
return parentPoint;
}
IntPoint Widget::convertToRootFrame(const IntPoint& localPoint) const {
if (const Widget* parentWidget = parent()) {
IntPoint parentPoint = convertToContainingWidget(localPoint);
return parentWidget->convertToRootFrame(parentPoint);
}
return localPoint;
}
IntRect Widget::convertToContainingWidget(const IntRect& localRect) const {
if (const Widget* parentWidget = parent()) {
IntRect parentRect(localRect);
parentRect.setLocation(
parentWidget->convertChildToSelf(this, localRect.location()));
return parentRect;
}
return localRect;
}
IntRect Widget::convertFromContainingWidget(const IntRect& parentRect) const {
if (const Widget* parentWidget = parent()) {
IntRect localRect = parentRect;
localRect.setLocation(
parentWidget->convertSelfToChild(this, localRect.location()));
return localRect;
}
return parentRect;
}
IntPoint Widget::convertToContainingWidget(const IntPoint& localPoint) const {
if (const Widget* parentWidget = parent())
return parentWidget->convertChildToSelf(this, localPoint);
return localPoint;
}
IntPoint Widget::convertFromContainingWidget(
const IntPoint& parentPoint) const {
if (const Widget* parentWidget = parent())
return parentWidget->convertSelfToChild(this, parentPoint);
return parentPoint;
}
IntPoint Widget::convertChildToSelf(const Widget*,
const IntPoint& point) const {
return point;
}
IntPoint Widget::convertSelfToChild(const Widget*,
const IntPoint& point) const {
return point;
}
} // namespace blink
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