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/*
* Copyright (C) 2010 Apple 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 "config.h"
#include "RenderIFrame.h"
#include "FrameView.h"
#include "HTMLNames.h"
#include "HTMLIFrameElement.h"
#include "RenderView.h"
#include "Settings.h"
namespace WebCore {
using namespace HTMLNames;
RenderIFrame::RenderIFrame(Element* element)
: RenderFrameBase(element)
{
}
void RenderIFrame::computeLogicalHeight()
{
RenderPart::computeLogicalHeight();
if (!flattenFrame())
return;
HTMLIFrameElement* frame = static_cast<HTMLIFrameElement*>(node());
bool isScrollable = frame->scrollingMode() != ScrollbarAlwaysOff;
if (isScrollable || !style()->height().isFixed()) {
FrameView* view = static_cast<FrameView*>(widget());
if (!view)
return;
int border = borderTop() + borderBottom();
setHeight(max(height(), view->contentsHeight() + border));
}
}
void RenderIFrame::computeLogicalWidth()
{
RenderPart::computeLogicalWidth();
if (!flattenFrame())
return;
HTMLIFrameElement* frame = static_cast<HTMLIFrameElement*>(node());
bool isScrollable = frame->scrollingMode() != ScrollbarAlwaysOff;
if (isScrollable || !style()->width().isFixed()) {
FrameView* view = static_cast<FrameView*>(widget());
if (!view)
return;
int border = borderLeft() + borderRight();
setWidth(max(width(), view->contentsWidth() + border));
}
}
bool RenderIFrame::flattenFrame()
{
if (!node() || !node()->hasTagName(iframeTag))
return false;
HTMLIFrameElement* element = static_cast<HTMLIFrameElement*>(node());
bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;
if (!isScrollable && style()->width().isFixed()
&& style()->height().isFixed())
return false;
Frame* frame = element->document()->frame();
bool enabled = frame && frame->settings()->frameFlatteningEnabled();
if (!enabled || !frame->page())
return false;
FrameView* view = frame->page()->mainFrame()->view();
if (!view)
return false;
// Do not flatten offscreen inner frames during frame flattening.
return absoluteBoundingBoxRect().intersects(IntRect(IntPoint(0, 0), view->contentsSize()));
}
void RenderIFrame::layout()
{
ASSERT(needsLayout());
RenderPart::computeLogicalWidth();
RenderPart::computeLogicalHeight();
if (flattenFrame()) {
layoutWithFlattening(style()->width().isFixed(), style()->height().isFixed());
return;
}
RenderPart::layout();
m_overflow.clear();
addShadowOverflow();
updateLayerTransform();
setNeedsLayout(false);
}
#if USE(ACCELERATED_COMPOSITING)
bool RenderIFrame::requiresLayer() const
{
if (RenderPart::requiresLayer())
return true;
return requiresAcceleratedCompositing();
}
bool RenderIFrame::requiresAcceleratedCompositing() const
{
if (!node() || !node()->hasTagName(iframeTag))
return false;
#if PLATFORM(ANDROID)
// XXX: Bug submitted to webkit.org
// https://bugs.webkit.org/show_bug.cgi?id=52655
if (style()->visibility() != VISIBLE)
return false;
#endif
// If the contents of the iframe are composited, then we have to be as well.
HTMLIFrameElement* element = static_cast<HTMLIFrameElement*>(node());
if (Document* contentDocument = element->contentDocument()) {
if (RenderView* view = contentDocument->renderView())
return view->usesCompositing();
}
return false;
}
#endif
}
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