mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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fe2024e105
Backed out changeset 014cc3de08fb (bug 827713) Backed out changeset 4113172193aa (bug 827713) Backed out changeset 27a5c8dd5ff7 (bug 827713) Backed out changeset 6448c7e05f11 (bug 827713) Backed out changeset b67a72618c66 (bug 827713) Backed out changeset 1279664e0d41 (bug 827713)
535 lines
22 KiB
C++
535 lines
22 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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#ifndef nsMathMLContainerFrame_h___
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#define nsMathMLContainerFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsCOMPtr.h"
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#include "nsContainerFrame.h"
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#include "nsBlockFrame.h"
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#include "nsInlineFrame.h"
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#include "nsMathMLAtoms.h"
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#include "nsMathMLOperators.h"
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#include "nsMathMLChar.h"
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#include "nsMathMLFrame.h"
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#include "nsMathMLParts.h"
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#include "mozilla/Likely.h"
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/*
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* Base class for MathML container frames. It acts like an inferred
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* mrow. By default, this frame uses its Reflow() method to lay its
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* children horizontally and ensure that their baselines are aligned.
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* The Reflow() method relies upon Place() to position children.
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* By overloading Place() in derived classes, it is therefore possible
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* to position children in various customized ways.
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*/
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// Options for the preferred size at which to stretch our stretchy children
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#define STRETCH_CONSIDER_ACTUAL_SIZE 0x00000001 // just use our current size
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#define STRETCH_CONSIDER_EMBELLISHMENTS 0x00000002 // size calculations include embellishments
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class nsMathMLContainerFrame : public nsContainerFrame,
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public nsMathMLFrame {
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friend class nsMathMLmfencedFrame;
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public:
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nsMathMLContainerFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// --------------------------------------------------------------------------
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// Overloaded nsMathMLFrame methods -- see documentation in nsIMathMLFrame.h
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NS_IMETHOD
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Stretch(nsRenderingContext& aRenderingContext,
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nsStretchDirection aStretchDirection,
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nsBoundingMetrics& aContainerSize,
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nsHTMLReflowMetrics& aDesiredStretchSize) MOZ_OVERRIDE;
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NS_IMETHOD
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UpdatePresentationDataFromChildAt(int32_t aFirstIndex,
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int32_t aLastIndex,
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uint32_t aFlagsValues,
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uint32_t aFlagsToUpdate) MOZ_OVERRIDE
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{
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PropagatePresentationDataFromChildAt(this, aFirstIndex, aLastIndex,
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aFlagsValues, aFlagsToUpdate);
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return NS_OK;
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}
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// helper to set the "increment script level" flag on the element belonging
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// to a child frame given by aChildIndex.
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// When this flag is set, the style system will increment the scriptlevel
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// for the child element. This is needed for situations where the style system
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// cannot itself determine the scriptlevel (mfrac, munder, mover, munderover).
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// This should be called during reflow. We set the flag and if it changed,
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// we request appropriate restyling and also queue a post-reflow callback
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// to ensure that restyle and reflow happens immediately after the current
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// reflow.
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void
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SetIncrementScriptLevel(int32_t aChildIndex, bool aIncrement);
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// --------------------------------------------------------------------------
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// Overloaded nsContainerFrame methods -- see documentation in nsIFrame.h
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virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
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{
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return !(aFlags & nsIFrame::eLineParticipant) &&
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nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eMathML | nsIFrame::eExcludesIgnorableWhitespace));
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}
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NS_IMETHOD
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AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) MOZ_OVERRIDE;
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NS_IMETHOD
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InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) MOZ_OVERRIDE;
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NS_IMETHOD
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RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) MOZ_OVERRIDE;
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/**
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* Both GetMinWidth and GetPrefWidth return whatever
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* GetIntrinsicWidth returns.
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*/
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virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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/**
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* Return the intrinsic width of the frame's content area.
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*/
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virtual nscoord GetIntrinsicWidth(nsRenderingContext *aRenderingContext);
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NS_IMETHOD
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Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus) MOZ_OVERRIDE;
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NS_IMETHOD
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WillReflow(nsPresContext* aPresContext) MOZ_OVERRIDE
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{
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mPresentationData.flags &= ~NS_MATHML_ERROR;
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return nsContainerFrame::WillReflow(aPresContext);
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}
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NS_IMETHOD
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DidReflow(nsPresContext* aPresContext,
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const nsHTMLReflowState* aReflowState,
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nsDidReflowStatus aStatus) MOZ_OVERRIDE
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{
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mPresentationData.flags &= ~NS_MATHML_STRETCH_DONE;
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return nsContainerFrame::DidReflow(aPresContext, aReflowState, aStatus);
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}
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) MOZ_OVERRIDE;
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virtual bool UpdateOverflow() MOZ_OVERRIDE;
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// Notification when an attribute is changed. The MathML module uses the
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// following paradigm:
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//
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// 1. If the MathML frame class doesn't have any cached automatic data that
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// depends on the attribute: we just reflow (e.g., this happens with <msub>,
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// <msup>, <mmultiscripts>, etc). This is the default behavior implemented
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// by this base class.
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//
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// 2. If the MathML frame class has cached automatic data that depends on
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// the attribute:
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// 2a. If the automatic data to update resides only within the descendants,
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// we just re-layout them using ReLayoutChildren(this);
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// (e.g., this happens with <ms>).
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// 2b. If the automatic data to update affects us in some way, we ask our parent
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// to re-layout its children using ReLayoutChildren(mParent);
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// Therefore, there is an overhead here in that our siblings are re-laid
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// too (e.g., this happens with <mstyle>, <munder>, <mover>, <munderover>).
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NS_IMETHOD
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AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) MOZ_OVERRIDE;
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// helper function to apply mirroring to a horizontal coordinate, if needed.
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nscoord
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MirrorIfRTL(nscoord aParentWidth, nscoord aChildWidth, nscoord aChildLeading)
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{
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return (StyleVisibility()->mDirection ?
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aParentWidth - aChildWidth - aChildLeading : aChildLeading);
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}
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// --------------------------------------------------------------------------
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// Additional methods
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protected:
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/* Place :
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* This method is used to measure or position child frames and other
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* elements. It may be called any number of times with aPlaceOrigin
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* false to measure, and the final call of the Reflow process before
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* returning from Reflow() or Stretch() will have aPlaceOrigin true
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* to position the elements.
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*
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* IMPORTANT: This method uses GetReflowAndBoundingMetricsFor() which must
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* have been set up with SaveReflowAndBoundingMetricsFor().
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*
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* The Place() method will use this information to compute the desired size
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* of the frame.
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*
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* @param aPlaceOrigin [in]
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* If aPlaceOrigin is false, compute your desired size using the
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* information from GetReflowAndBoundingMetricsFor. However, child
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* frames or other elements should not be repositioned.
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*
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* If aPlaceOrigin is true, reflow is finished. You should position
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* all your children, and return your desired size. You should now
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* use FinishReflowChild() on your children to complete post-reflow
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* operations.
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*
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* @param aDesiredSize [out] parameter where you should return your desired
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* size and your ascent/descent info. Compute your desired size using
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* the information from GetReflowAndBoundingMetricsFor, and include
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* any space you want for border/padding in the desired size you
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* return.
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*/
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virtual nsresult
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Place(nsRenderingContext& aRenderingContext,
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bool aPlaceOrigin,
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nsHTMLReflowMetrics& aDesiredSize);
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// MeasureForWidth:
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//
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// A method used by nsMathMLContainerFrame::GetIntrinsicWidth to get the
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// width that a particular Place method desires. For most frames, this will
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// just call the object's Place method. However <msqrt> and <menclose> use
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// nsMathMLContainerFrame::GetIntrinsicWidth to measure the child frames as
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// if in an <mrow>, and so their frames implement MeasureForWidth to use
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// nsMathMLContainerFrame::Place.
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virtual nsresult
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MeasureForWidth(nsRenderingContext& aRenderingContext,
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nsHTMLReflowMetrics& aDesiredSize);
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// helper to re-sync the automatic data in our children and notify our parent to
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// reflow us when changes (e.g., append/insert/remove) happen in our child list
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virtual nsresult
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ChildListChanged(int32_t aModType);
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// helper to get the preferred size that a container frame should use to fire
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// the stretch on its stretchy child frames.
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void
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GetPreferredStretchSize(nsRenderingContext& aRenderingContext,
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uint32_t aOptions,
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nsStretchDirection aStretchDirection,
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nsBoundingMetrics& aPreferredStretchSize);
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// helper used by mstyle, mphantom, mpadded and mrow in their implementation
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// of TransmitAutomaticData() to determine whether they are space-like.
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nsresult
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TransmitAutomaticDataForMrowLikeElement();
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public:
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// error handlers to provide a visual feedback to the user when an error
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// (typically invalid markup) was encountered during reflow.
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nsresult
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ReflowError(nsRenderingContext& aRenderingContext,
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nsHTMLReflowMetrics& aDesiredSize);
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/*
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* Helper to call ReportErrorToConsole for parse errors involving
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* attribute/value pairs.
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* @param aAttribute The attribute for which the parse error occured.
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* @param aValue The value for which the parse error occured.
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*/
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nsresult
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ReportParseError(const PRUnichar* aAttribute,
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const PRUnichar* aValue);
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/*
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* Helper to call ReportErrorToConsole when certain tags
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* have more than the expected amount of children.
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*/
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nsresult
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ReportChildCountError();
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/*
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* Helper to call ReportToConsole when an error occurs.
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* @param aParams see nsContentUtils::ReportToConsole
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*/
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nsresult
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ReportErrorToConsole(const char* aErrorMsgId,
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const PRUnichar** aParams = nullptr,
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uint32_t aParamCount = 0);
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// helper method to reflow a child frame. We are inline frames, and we don't
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// know our positions until reflow is finished. That's why we ask the
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// base method not to worry about our position.
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nsresult
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ReflowChild(nsIFrame* aKidFrame,
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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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protected:
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// helper to add the inter-spacing when <math> is the immediate parent.
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// Since we don't (yet) handle the root <math> element ourselves, we need to
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// take special care of the inter-frame spacing on elements for which <math>
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// is the direct xml parent. This function will be repeatedly called from
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// left to right on the childframes of <math>, and by so doing it will
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// emulate the spacing that would have been done by a <mrow> container.
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// e.g., it fixes <math> <mi>f</mi> <mo>q</mo> <mi>f</mi> <mo>I</mo> </math>
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virtual nscoord
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FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize);
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// helper method to complete the post-reflow hook and ensure that embellished
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// operators don't terminate their Reflow without receiving a Stretch command.
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virtual nsresult
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FinalizeReflow(nsRenderingContext& aRenderingContext,
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nsHTMLReflowMetrics& aDesiredSize);
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// Record metrics of a child frame for recovery through the following method
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static void
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SaveReflowAndBoundingMetricsFor(nsIFrame* aFrame,
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const nsHTMLReflowMetrics& aReflowMetrics,
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const nsBoundingMetrics& aBoundingMetrics);
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// helper method to facilitate getting the reflow and bounding metrics of a
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// child frame. The argument aMathMLFrameType, when non null, will return
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// the 'type' of the frame, which is used to determine the inter-frame
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// spacing.
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// IMPORTANT: This function is only meant to be called in Place() methods as
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// the information is available only when set up with the above method
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// during Reflow/Stretch() and GetPrefWidth().
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static void
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GetReflowAndBoundingMetricsFor(nsIFrame* aFrame,
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nsHTMLReflowMetrics& aReflowMetrics,
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nsBoundingMetrics& aBoundingMetrics,
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eMathMLFrameType* aMathMLFrameType = nullptr);
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// helper method to clear metrics saved with
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// SaveReflowAndBoundingMetricsFor() from all child frames.
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void ClearSavedChildMetrics();
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// helper to let the update of presentation data pass through
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// a subtree that may contain non-MathML container frames
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static void
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PropagatePresentationDataFor(nsIFrame* aFrame,
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uint32_t aFlagsValues,
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uint32_t aFlagsToUpdate);
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public:
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static void
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PropagatePresentationDataFromChildAt(nsIFrame* aParentFrame,
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int32_t aFirstChildIndex,
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int32_t aLastChildIndex,
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uint32_t aFlagsValues,
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uint32_t aFlagsToUpdate);
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// helper to let the rebuild of automatic data (presentation data
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// and embellishement data) walk through a subtree that may contain
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// non-MathML container frames. Note that this method re-builds the
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// automatic data in the children -- not in aParentFrame itself (except
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// for those particular operations that the parent frame may do in its
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// TransmitAutomaticData()). The reason it works this way is because
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// a container frame knows what it wants for its children, whereas children
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// have no clue who their parent is. For example, it is <mfrac> who knows
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// that its children have to be in scriptsizes, and has to transmit this
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// information to them. Hence, when changes occur in a child frame, the child
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// has to request the re-build from its parent. Unfortunately, the extra cost
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// for this is that it will re-sync in the siblings of the child as well.
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static void
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RebuildAutomaticDataForChildren(nsIFrame* aParentFrame);
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// helper to blow away the automatic data cached in a frame's subtree and
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// re-layout its subtree to reflect changes that may have happen. In the
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// event where aParentFrame isn't a MathML frame, it will first walk up to
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// the ancestor that is a MathML frame, and re-layout from there -- this is
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// to guarantee that automatic data will be rebuilt properly. Note that this
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// method re-builds the automatic data in the children -- not in the parent
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// frame itself (except for those particular operations that the parent frame
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// may do do its TransmitAutomaticData()). @see RebuildAutomaticDataForChildren
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//
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// aBits are the bits to pass to FrameNeedsReflow() when we call it.
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static nsresult
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ReLayoutChildren(nsIFrame* aParentFrame);
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protected:
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// Helper method which positions child frames as an <mrow> on given baseline
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// y = aBaseline starting from x = aOffsetX, calling FinishReflowChild()
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// on the frames.
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void
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PositionRowChildFrames(nscoord aOffsetX, nscoord aBaseline);
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// A variant on FinishAndStoreOverflow() that uses the union of child
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// overflows, the frame bounds, and mBoundingMetrics to set and store the
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// overflow.
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void GatherAndStoreOverflow(nsHTMLReflowMetrics* aMetrics);
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/**
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* Call DidReflow() if the NS_FRAME_IN_REFLOW frame bit is set on aFirst and
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* all its next siblings up to, but not including, aStop.
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* aStop == nullptr meaning all next siblings with the bit set.
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* The method does nothing if aFirst == nullptr.
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*/
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static void DidReflowChildren(nsIFrame* aFirst, nsIFrame* aStop = nullptr);
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private:
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class RowChildFrameIterator;
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friend class RowChildFrameIterator;
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};
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// --------------------------------------------------------------------------
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// Currently, to benefit from line-breaking inside the <math> element, <math> is
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// simply mapping to nsBlockFrame or nsInlineFrame.
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// A separate implemention needs to provide:
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// 1) line-breaking
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// 2) proper inter-frame spacing
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// 3) firing of Stretch() (in which case FinalizeReflow() would have to be cleaned)
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// Issues: If/when mathml becomes a pluggable component, the separation will be needed.
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class nsMathMLmathBlockFrame : public nsBlockFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS
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friend nsIFrame* NS_NewMathMLmathBlockFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext, uint32_t aFlags);
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// beware, mFrames is not set by nsBlockFrame
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// cannot use mFrames{.FirstChild()|.etc} since the block code doesn't set mFrames
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NS_IMETHOD
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SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) MOZ_OVERRIDE
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{
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NS_ASSERTION(aListID == kPrincipalList, "unexpected frame list");
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nsresult rv = nsBlockFrame::SetInitialChildList(aListID, aChildList);
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// re-resolve our subtree to set any mathml-expected data
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nsMathMLContainerFrame::RebuildAutomaticDataForChildren(this);
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return rv;
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}
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NS_IMETHOD
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AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) MOZ_OVERRIDE
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{
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NS_ASSERTION(aListID == kPrincipalList || aListID == kNoReflowPrincipalList,
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"unexpected frame list");
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nsresult rv = nsBlockFrame::AppendFrames(aListID, aFrameList);
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if (MOZ_LIKELY(aListID == kPrincipalList))
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nsMathMLContainerFrame::ReLayoutChildren(this);
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return rv;
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}
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NS_IMETHOD
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InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) MOZ_OVERRIDE
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{
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NS_ASSERTION(aListID == kPrincipalList || aListID == kNoReflowPrincipalList,
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"unexpected frame list");
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nsresult rv = nsBlockFrame::InsertFrames(aListID, aPrevFrame, aFrameList);
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if (MOZ_LIKELY(aListID == kPrincipalList))
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nsMathMLContainerFrame::ReLayoutChildren(this);
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return rv;
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}
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NS_IMETHOD
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RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) MOZ_OVERRIDE
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{
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NS_ASSERTION(aListID == kPrincipalList || aListID == kNoReflowPrincipalList,
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"unexpected frame list");
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nsresult rv = nsBlockFrame::RemoveFrame(aListID, aOldFrame);
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if (MOZ_LIKELY(aListID == kPrincipalList))
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nsMathMLContainerFrame::ReLayoutChildren(this);
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return rv;
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}
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virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE {
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return nsBlockFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eMathML | nsIFrame::eExcludesIgnorableWhitespace));
|
|
}
|
|
|
|
protected:
|
|
nsMathMLmathBlockFrame(nsStyleContext* aContext) : nsBlockFrame(aContext) {
|
|
// We should always have a float manager. Not that things can really try
|
|
// to float out of us anyway, but we need one for line layout.
|
|
AddStateBits(NS_BLOCK_FLOAT_MGR);
|
|
}
|
|
virtual ~nsMathMLmathBlockFrame() {}
|
|
};
|
|
|
|
// --------------
|
|
|
|
class nsMathMLmathInlineFrame : public nsInlineFrame {
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
friend nsIFrame* NS_NewMathMLmathInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
|
|
|
|
NS_IMETHOD
|
|
SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList) MOZ_OVERRIDE
|
|
{
|
|
NS_ASSERTION(aListID == kPrincipalList, "unexpected frame list");
|
|
nsresult rv = nsInlineFrame::SetInitialChildList(aListID, aChildList);
|
|
// re-resolve our subtree to set any mathml-expected data
|
|
nsMathMLContainerFrame::RebuildAutomaticDataForChildren(this);
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHOD
|
|
AppendFrames(ChildListID aListID,
|
|
nsFrameList& aFrameList) MOZ_OVERRIDE
|
|
{
|
|
NS_ASSERTION(aListID == kPrincipalList || aListID == kNoReflowPrincipalList,
|
|
"unexpected frame list");
|
|
nsresult rv = nsInlineFrame::AppendFrames(aListID, aFrameList);
|
|
if (MOZ_LIKELY(aListID == kPrincipalList))
|
|
nsMathMLContainerFrame::ReLayoutChildren(this);
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHOD
|
|
InsertFrames(ChildListID aListID,
|
|
nsIFrame* aPrevFrame,
|
|
nsFrameList& aFrameList) MOZ_OVERRIDE
|
|
{
|
|
NS_ASSERTION(aListID == kPrincipalList || aListID == kNoReflowPrincipalList,
|
|
"unexpected frame list");
|
|
nsresult rv = nsInlineFrame::InsertFrames(aListID, aPrevFrame, aFrameList);
|
|
if (MOZ_LIKELY(aListID == kPrincipalList))
|
|
nsMathMLContainerFrame::ReLayoutChildren(this);
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHOD
|
|
RemoveFrame(ChildListID aListID,
|
|
nsIFrame* aOldFrame) MOZ_OVERRIDE
|
|
{
|
|
NS_ASSERTION(aListID == kPrincipalList || aListID == kNoReflowPrincipalList,
|
|
"unexpected frame list");
|
|
nsresult rv = nsInlineFrame::RemoveFrame(aListID, aOldFrame);
|
|
if (MOZ_LIKELY(aListID == kPrincipalList))
|
|
nsMathMLContainerFrame::ReLayoutChildren(this);
|
|
return rv;
|
|
}
|
|
|
|
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE {
|
|
return nsInlineFrame::IsFrameOfType(aFlags &
|
|
~(nsIFrame::eMathML | nsIFrame::eExcludesIgnorableWhitespace));
|
|
}
|
|
|
|
protected:
|
|
nsMathMLmathInlineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
|
|
virtual ~nsMathMLmathInlineFrame() {}
|
|
};
|
|
|
|
#endif /* nsMathMLContainerFrame_h___ */
|