зеркало из https://github.com/mozilla/gecko-dev.git
119 строки
3.7 KiB
C++
119 строки
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* base class for rendering objects that do not have child lists */
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#include "nsLeafFrame.h"
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#include "nsPresContext.h"
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nsLeafFrame::~nsLeafFrame()
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{
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsLeafFrame)
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/* virtual */ nscoord
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nsLeafFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
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{
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nscoord result;
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DISPLAY_MIN_WIDTH(this, result);
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result = GetIntrinsicWidth();
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return result;
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}
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/* virtual */ nscoord
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nsLeafFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
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{
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nscoord result;
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DISPLAY_PREF_WIDTH(this, result);
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result = GetIntrinsicWidth();
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return result;
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}
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/* virtual */ nsSize
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nsLeafFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder,
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nsSize aPadding, bool aShrinkWrap)
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{
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return nsSize(GetIntrinsicWidth(), GetIntrinsicHeight());
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}
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NS_IMETHODIMP
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nsLeafFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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DO_GLOBAL_REFLOW_COUNT("nsLeafFrame");
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsLeafFrame::Reflow: aMaxSize=%d,%d",
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aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));
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NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
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DoReflow(aPresContext, aMetrics, aReflowState, aStatus);
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FinishAndStoreOverflow(&aMetrics);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsLeafFrame::DoReflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
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"Shouldn't have unconstrained stuff here "
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"Thanks to the rules of reflow");
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NS_ASSERTION(NS_INTRINSICSIZE != aReflowState.ComputedHeight(),
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"Shouldn't have unconstrained stuff here "
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"thanks to ComputeAutoSize");
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aMetrics.Width() = aReflowState.ComputedWidth();
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aMetrics.Height() = aReflowState.ComputedHeight();
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AddBordersAndPadding(aReflowState, aMetrics);
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("exit nsLeafFrame::DoReflow: size=%d,%d",
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aMetrics.Width(), aMetrics.Height()));
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
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aMetrics.SetOverflowAreasToDesiredBounds();
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return NS_OK;
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}
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nscoord
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nsLeafFrame::GetIntrinsicHeight()
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{
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NS_NOTREACHED("Someone didn't override Reflow or ComputeAutoSize");
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return 0;
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}
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// XXX how should border&padding effect baseline alignment?
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// => descent = borderPadding.bottom for example
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void
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nsLeafFrame::AddBordersAndPadding(const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aMetrics)
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{
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aMetrics.Width() += aReflowState.ComputedPhysicalBorderPadding().LeftRight();
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aMetrics.Height() += aReflowState.ComputedPhysicalBorderPadding().TopBottom();
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}
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void
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nsLeafFrame::SizeToAvailSize(const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aDesiredSize)
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{
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aDesiredSize.Width() = aReflowState.AvailableWidth(); // FRAME
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aDesiredSize.Height() = aReflowState.AvailableHeight();
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aDesiredSize.SetOverflowAreasToDesiredBounds();
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FinishAndStoreOverflow(&aDesiredSize);
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}
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