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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 "Frame.h"
#include "FrameView.h"
#include "HTMLIFrameElement.h"
#include "HTMLNames.h"
#include "Page.h"
#include "RenderView.h"
#include "Settings.h"
#include <wtf/StackStats.h>
namespace WebCore {
using namespace HTMLNames;
RenderIFrame::RenderIFrame(Element* element)
: RenderFrameBase(element)
{
}
bool RenderIFrame::shouldComputeSizeAsReplaced() const
{
// When we're seamless, we use normal block/box sizing code except when inline.
return !isSeamless();
}
bool RenderIFrame::isInlineBlockOrInlineTable() const
{
return isSeamless() && isInline();
}
LayoutUnit RenderIFrame::minPreferredLogicalWidth() const
{
if (!isSeamless())
return RenderFrameBase::minPreferredLogicalWidth();
RenderView* childRoot = contentRootRenderer();
if (!childRoot)
return 0;
return childRoot->minPreferredLogicalWidth() + borderAndPaddingLogicalWidth();
}
LayoutUnit RenderIFrame::maxPreferredLogicalWidth() const
{
if (!isSeamless())
return RenderFrameBase::maxPreferredLogicalWidth();
RenderView* childRoot = contentRootRenderer();
if (!childRoot)
return 0;
return childRoot->maxPreferredLogicalWidth() + borderAndPaddingLogicalWidth();
}
bool RenderIFrame::isSeamless() const
{
return node() && node()->hasTagName(iframeTag) && toHTMLIFrameElement(node())->shouldDisplaySeamlessly();
}
bool RenderIFrame::requiresLayer() const
{
return RenderFrameBase::requiresLayer() || style()->resize() != RESIZE_NONE;
}
RenderView* RenderIFrame::contentRootRenderer() const
{
// FIXME: Is this always a valid cast? What about plugins?
ASSERT(!widget() || widget()->isFrameView());
FrameView* childFrameView = toFrameView(widget());
return childFrameView ? childFrameView->frame()->contentRenderer() : 0;
}
bool RenderIFrame::flattenFrame() const
{
if (!node() || !node()->hasTagName(iframeTag))
return false;
HTMLIFrameElement* element = toHTMLIFrameElement(node());
Frame* frame = element->document()->frame();
if (isSeamless())
return false; // Seamless iframes are already "flat", don't try to flatten them.
bool enabled = frame && frame->settings() && frame->settings()->frameFlatteningEnabled();
if (!enabled || !frame->page())
return false;
if (style()->width().isFixed() && style()->height().isFixed()) {
// Do not flatten iframes with scrolling="no".
if (element->scrollingMode() == ScrollbarAlwaysOff)
return false;
if (style()->width().value() <= 0 || style()->height().value() <= 0)
return false;
}
// Do not flatten offscreen inner frames during frame flattening, as flattening might make them visible.
IntRect boundingRect = absoluteBoundingBoxRectIgnoringTransforms();
return boundingRect.maxX() > 0 && boundingRect.maxY() > 0;
}
void RenderIFrame::layoutSeamlessly()
{
updateLogicalWidth();
// FIXME: Containers set their height to 0 before laying out their kids (as we're doing here)
// however, this causes FrameView::layout() to add vertical scrollbars, incorrectly inflating
// the resulting contentHeight(). We'll need to make FrameView::layout() smarter.
setLogicalHeight(0);
updateWidgetPosition(); // Tell the Widget about our new width/height (it will also layout the child document).
// Laying out our kids is normally responsible for adjusting our height, so we set it here.
// Replaced elements normally do not respect padding, but seamless elements should: we'll add
// both padding and border to the child's logical height here.
FrameView* childFrameView = toFrameView(widget());
if (childFrameView) // Widget should never be null during layout(), but just in case.
setLogicalHeight(childFrameView->contentsHeight() + borderTop() + borderBottom() + paddingTop() + paddingBottom());
updateLogicalHeight();
updateWidgetPosition(); // Notify the Widget of our final height.
// Assert that the child document did a complete layout.
RenderView* childRoot = childFrameView ? childFrameView->frame()->contentRenderer() : 0;
ASSERT(!childFrameView || !childFrameView->layoutPending());
ASSERT_UNUSED(childRoot, !childRoot || !childRoot->needsLayout());
}
void RenderIFrame::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
if (isSeamless()) {
layoutSeamlessly();
// Do not return so as to share the layer and overflow updates below.
} else {
updateLogicalWidth();
// No kids to layout as a replaced element.
updateLogicalHeight();
if (flattenFrame())
layoutWithFlattening(style()->width().isFixed(), style()->height().isFixed());
}
m_overflow.clear();
addVisualEffectOverflow();
updateLayerTransform();
setNeedsLayout(false);
}
}
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