зеркало из https://github.com/mozilla/gecko-dev.git
379 строки
11 KiB
C++
379 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; 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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//
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// Eric Vaughan
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// Netscape Communications
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//
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// See documentation in associated header file
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//
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#include "nsLeafBoxFrame.h"
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#include "nsBoxFrame.h"
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#include "nsCOMPtr.h"
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#include "nsGkAtoms.h"
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#include "nsPresContext.h"
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#include "nsStyleContext.h"
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#include "nsIContent.h"
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#include "nsNameSpaceManager.h"
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#include "nsBoxLayoutState.h"
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#include "nsWidgetsCID.h"
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#include "nsViewManager.h"
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#include "nsContainerFrame.h"
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#include "nsDisplayList.h"
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#include <algorithm>
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//
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// NS_NewLeafBoxFrame
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//
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// Creates a new Toolbar frame and returns it
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//
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nsIFrame*
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NS_NewLeafBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsLeafBoxFrame(aPresShell, aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsLeafBoxFrame)
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nsLeafBoxFrame::nsLeafBoxFrame(nsIPresShell* aShell, nsStyleContext* aContext)
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: nsLeafFrame(aContext)
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{
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}
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#ifdef DEBUG_LAYOUT
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void
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nsLeafBoxFrame::GetBoxName(nsAutoString& aName)
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{
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GetFrameName(aName);
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}
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#endif
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/**
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* Initialize us. This is a good time to get the alignment of the box
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*/
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void
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nsLeafBoxFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsLeafFrame::Init(aContent, aParent, aPrevInFlow);
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if (GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER) {
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AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
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}
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UpdateMouseThrough();
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}
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nsresult
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nsLeafBoxFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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nsresult rv = nsLeafFrame::AttributeChanged(aNameSpaceID, aAttribute,
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aModType);
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if (aAttribute == nsGkAtoms::mousethrough)
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UpdateMouseThrough();
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return rv;
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}
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void nsLeafBoxFrame::UpdateMouseThrough()
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{
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if (mContent) {
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static nsIContent::AttrValuesArray strings[] =
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{&nsGkAtoms::never, &nsGkAtoms::always, nullptr};
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switch (mContent->FindAttrValueIn(kNameSpaceID_None,
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nsGkAtoms::mousethrough,
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strings, eCaseMatters)) {
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case 0: AddStateBits(NS_FRAME_MOUSE_THROUGH_NEVER); break;
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case 1: AddStateBits(NS_FRAME_MOUSE_THROUGH_ALWAYS); break;
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case 2: {
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RemoveStateBits(NS_FRAME_MOUSE_THROUGH_ALWAYS);
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RemoveStateBits(NS_FRAME_MOUSE_THROUGH_NEVER);
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break;
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}
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}
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}
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}
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void
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nsLeafBoxFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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// REVIEW: GetFrameForPoint used to not report events for the background
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// layer, whereas this code will put an event receiver for this frame in the
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// BlockBorderBackground() list. But I don't see any need to preserve
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// that anomalous behaviour. The important thing I'm preserving is that
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// leaf boxes continue to receive events in the foreground layer.
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DisplayBorderBackgroundOutline(aBuilder, aLists);
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if (!aBuilder->IsForEventDelivery() || !IsVisibleForPainting(aBuilder))
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return;
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aLists.Content()->AppendNewToTop(new (aBuilder)
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nsDisplayEventReceiver(aBuilder, this));
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}
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/* virtual */ nscoord
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nsLeafBoxFrame::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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nsBoxLayoutState state(PresContext(), aRenderingContext);
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nsSize minSize = GetMinSize(state);
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// GetMinSize returns border-box width, and we want to return content
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// width. Since Reflow uses the reflow state's border and padding, we
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// actually just want to subtract what GetMinSize added, which is the
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// result of GetBorderAndPadding.
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nsMargin bp;
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GetBorderAndPadding(bp);
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result = minSize.width - bp.LeftRight();
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return result;
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}
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/* virtual */ nscoord
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nsLeafBoxFrame::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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nsBoxLayoutState state(PresContext(), aRenderingContext);
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nsSize prefSize = GetPrefSize(state);
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// GetPrefSize returns border-box width, and we want to return content
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// width. Since Reflow uses the reflow state's border and padding, we
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// actually just want to subtract what GetPrefSize added, which is the
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// result of GetBorderAndPadding.
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nsMargin bp;
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GetBorderAndPadding(bp);
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result = prefSize.width - bp.LeftRight();
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return result;
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}
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nscoord
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nsLeafBoxFrame::GetIntrinsicWidth()
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{
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// No intrinsic width
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return 0;
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}
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nsSize
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nsLeafBoxFrame::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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// Important: NOT calling our direct superclass here!
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return nsFrame::ComputeAutoSize(aRenderingContext, aCBSize, aAvailableWidth,
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aMargin, aBorder, aPadding, aShrinkWrap);
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}
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void
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nsLeafBoxFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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// This is mostly a copy of nsBoxFrame::Reflow().
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// We aren't able to share an implementation because of the frame
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// class hierarchy. If you make changes here, please keep
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// nsBoxFrame::Reflow in sync.
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DO_GLOBAL_REFLOW_COUNT("nsLeafBoxFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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NS_ASSERTION(aReflowState.ComputedWidth() >=0 &&
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aReflowState.ComputedHeight() >= 0, "Computed Size < 0");
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#ifdef DO_NOISY_REFLOW
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printf("\n-------------Starting LeafBoxFrame Reflow ----------------------------\n");
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printf("%p ** nsLBF::Reflow %d R: ", this, myCounter++);
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switch (aReflowState.reason) {
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case eReflowReason_Initial:
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printf("Ini");break;
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case eReflowReason_Incremental:
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printf("Inc");break;
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case eReflowReason_Resize:
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printf("Rsz");break;
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case eReflowReason_StyleChange:
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printf("Sty");break;
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case eReflowReason_Dirty:
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printf("Drt ");
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break;
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default:printf("<unknown>%d", aReflowState.reason);break;
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}
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printSize("AW", aReflowState.AvailableWidth());
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printSize("AH", aReflowState.AvailableHeight());
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printSize("CW", aReflowState.ComputedWidth());
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printSize("CH", aReflowState.ComputedHeight());
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printf(" *\n");
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#endif
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aStatus = NS_FRAME_COMPLETE;
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// create the layout state
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nsBoxLayoutState state(aPresContext, aReflowState.rendContext);
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nsSize computedSize(aReflowState.ComputedWidth(),aReflowState.ComputedHeight());
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nsMargin m;
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m = aReflowState.ComputedPhysicalBorderPadding();
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//GetBorderAndPadding(m);
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// this happens sometimes. So lets handle it gracefully.
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if (aReflowState.ComputedHeight() == 0) {
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nsSize minSize = GetMinSize(state);
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computedSize.height = minSize.height - m.top - m.bottom;
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}
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nsSize prefSize(0,0);
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// if we are told to layout intrinic then get our preferred size.
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if (computedSize.width == NS_INTRINSICSIZE || computedSize.height == NS_INTRINSICSIZE) {
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prefSize = GetPrefSize(state);
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nsSize minSize = GetMinSize(state);
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nsSize maxSize = GetMaxSize(state);
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prefSize = BoundsCheck(minSize, prefSize, maxSize);
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}
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// get our desiredSize
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if (aReflowState.ComputedWidth() == NS_INTRINSICSIZE) {
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computedSize.width = prefSize.width;
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} else {
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computedSize.width += m.left + m.right;
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}
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if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) {
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computedSize.height = prefSize.height;
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} else {
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computedSize.height += m.top + m.bottom;
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}
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// handle reflow state min and max sizes
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// XXXbz the width handling here seems to be wrong, since
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// mComputedMin/MaxWidth is a content-box size, whole
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// computedSize.width is a border-box size...
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if (computedSize.width > aReflowState.ComputedMaxWidth())
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computedSize.width = aReflowState.ComputedMaxWidth();
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if (computedSize.width < aReflowState.ComputedMinWidth())
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computedSize.width = aReflowState.ComputedMinWidth();
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// Now adjust computedSize.height for our min and max computed
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// height. The only problem is that those are content-box sizes,
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// while computedSize.height is a border-box size. So subtract off
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// m.TopBottom() before adjusting, then readd it.
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computedSize.height = std::max(0, computedSize.height - m.TopBottom());
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computedSize.height = NS_CSS_MINMAX(computedSize.height,
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aReflowState.ComputedMinHeight(),
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aReflowState.ComputedMaxHeight());
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computedSize.height += m.TopBottom();
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nsRect r(mRect.x, mRect.y, computedSize.width, computedSize.height);
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SetBounds(state, r);
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// layout our children
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Layout(state);
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// ok our child could have gotten bigger. So lets get its bounds
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aDesiredSize.Width() = mRect.width;
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aDesiredSize.Height() = mRect.height;
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aDesiredSize.SetBlockStartAscent(GetBoxAscent(state));
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// the overflow rect is set in SetBounds() above
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aDesiredSize.mOverflowAreas = GetOverflowAreas();
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#ifdef DO_NOISY_REFLOW
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{
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printf("%p ** nsLBF(done) W:%d H:%d ", this, aDesiredSize.Width(), aDesiredSize.Height());
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if (maxElementWidth) {
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printf("MW:%d\n", *maxElementWidth);
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} else {
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printf("MW:?\n");
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}
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}
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#endif
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}
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#ifdef DEBUG_FRAME_DUMP
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nsresult
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nsLeafBoxFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("LeafBox"), aResult);
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}
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#endif
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nsIAtom*
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nsLeafBoxFrame::GetType() const
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{
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return nsGkAtoms::leafBoxFrame;
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}
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nsresult
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nsLeafBoxFrame::CharacterDataChanged(CharacterDataChangeInfo* aInfo)
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{
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MarkIntrinsicWidthsDirty();
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return nsLeafFrame::CharacterDataChanged(aInfo);
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}
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/* virtual */ nsSize
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nsLeafBoxFrame::GetPrefSize(nsBoxLayoutState& aState)
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{
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return nsBox::GetPrefSize(aState);
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}
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/* virtual */ nsSize
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nsLeafBoxFrame::GetMinSize(nsBoxLayoutState& aState)
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{
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return nsBox::GetMinSize(aState);
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}
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/* virtual */ nsSize
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nsLeafBoxFrame::GetMaxSize(nsBoxLayoutState& aState)
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{
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return nsBox::GetMaxSize(aState);
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}
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/* virtual */ nscoord
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nsLeafBoxFrame::GetFlex(nsBoxLayoutState& aState)
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{
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return nsBox::GetFlex(aState);
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}
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/* virtual */ nscoord
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nsLeafBoxFrame::GetBoxAscent(nsBoxLayoutState& aState)
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{
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return nsBox::GetBoxAscent(aState);
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}
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/* virtual */ void
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nsLeafBoxFrame::MarkIntrinsicWidthsDirty()
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{
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// Don't call base class method, since everything it does is within an
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// IsBoxWrapped check.
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}
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NS_IMETHODIMP
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nsLeafBoxFrame::DoLayout(nsBoxLayoutState& aState)
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{
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return nsBox::DoLayout(aState);
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}
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