124 lines
4.2 KiB
C++
124 lines
4.2 KiB
C++
/*
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* Copyright (C) 2010 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "RenderIFrame.h"
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#include "Frame.h"
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#include "FrameView.h"
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#include "HTMLIFrameElement.h"
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#include "HTMLNames.h"
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#include "RenderView.h"
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#include "Settings.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/StackStats.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(RenderIFrame);
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using namespace HTMLNames;
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RenderIFrame::RenderIFrame(HTMLIFrameElement& element, RenderStyle&& style)
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: RenderFrameBase(element, WTFMove(style))
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{
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}
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HTMLIFrameElement& RenderIFrame::iframeElement() const
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{
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return downcast<HTMLIFrameElement>(RenderFrameBase::frameOwnerElement());
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}
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bool RenderIFrame::shouldComputeSizeAsReplaced() const
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{
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return true;
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}
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bool RenderIFrame::isInlineBlockOrInlineTable() const
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{
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return isInline();
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}
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bool RenderIFrame::requiresLayer() const
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{
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return RenderFrameBase::requiresLayer() || style().resize() != Resize::None;
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}
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RenderView* RenderIFrame::contentRootRenderer() const
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{
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FrameView* childFrameView = childView();
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return childFrameView ? childFrameView->frame().contentRenderer() : 0;
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}
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bool RenderIFrame::isFullScreenIFrame() const
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{
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// Some authors implement fullscreen popups as out-of-flow iframes with size set to full viewport (using vw/vh units).
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// The size used may not perfectly match the viewport size so the following heuristic uses a relaxed constraint.
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return style().hasOutOfFlowPosition() && style().hasViewportUnits();
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}
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bool RenderIFrame::flattenFrame() const
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{
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if (view().frameView().effectiveFrameFlattening() == FrameFlattening::Disabled)
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return false;
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if (style().width().isFixed() && style().height().isFixed()) {
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// Do not flatten iframes with scrolling="no".
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if (iframeElement().scrollingMode() == ScrollbarAlwaysOff)
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return false;
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// Do not flatten iframes that have zero size, as flattening might make them visible.
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if (style().width().value() <= 0 || style().height().value() <= 0)
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return false;
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// Do not flatten "fullscreen" iframes or they could become larger than the viewport.
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if (view().frameView().effectiveFrameFlattening() <= FrameFlattening::EnabledForNonFullScreenIFrames && isFullScreenIFrame())
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return false;
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}
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// Do not flatten offscreen inner frames during frame flattening, as flattening might make them visible.
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IntRect boundingRect = absoluteBoundingBoxRectIgnoringTransforms();
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return boundingRect.maxX() > 0 && boundingRect.maxY() > 0;
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}
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void RenderIFrame::layout()
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{
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StackStats::LayoutCheckPoint layoutCheckPoint;
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ASSERT(needsLayout());
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updateLogicalWidth();
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// No kids to layout as a replaced element.
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updateLogicalHeight();
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if (flattenFrame())
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layoutWithFlattening(style().width().isFixed(), style().height().isFixed());
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clearOverflow();
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addVisualEffectOverflow();
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updateLayerTransform();
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clearNeedsLayout();
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}
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}
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