mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
868 lines
29 KiB
C++
868 lines
29 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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#include "nsMathMLmencloseFrame.h"
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#include "nsPresContext.h"
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#include "nsRenderingContext.h"
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#include "nsWhitespaceTokenizer.h"
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#include "nsDisplayList.h"
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#include "gfxContext.h"
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#include "nsMathMLChar.h"
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#include <algorithm>
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//
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// <menclose> -- enclose content with a stretching symbol such
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// as a long division sign. - implementation
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// longdiv:
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// Unicode 5.1 assigns U+27CC to LONG DIVISION, but a right parenthesis
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// renders better with current font support.
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static const char16_t kLongDivChar = ')';
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// radical: 'SQUARE ROOT'
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static const char16_t kRadicalChar = 0x221A;
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// updiagonalstrike
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static const uint8_t kArrowHeadSize = 10;
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// phasorangle
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static const uint8_t kPhasorangleWidth = 8;
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nsIFrame*
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NS_NewMathMLmencloseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsMathMLmencloseFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmencloseFrame)
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nsMathMLmencloseFrame::nsMathMLmencloseFrame(nsStyleContext* aContext) :
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nsMathMLContainerFrame(aContext), mNotationsToDraw(0),
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mLongDivCharIndex(-1), mRadicalCharIndex(-1), mContentWidth(0)
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{
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}
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nsMathMLmencloseFrame::~nsMathMLmencloseFrame()
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{
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}
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nsresult nsMathMLmencloseFrame::AllocateMathMLChar(nsMencloseNotation mask)
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{
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// Is the char already allocated?
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if ((mask == NOTATION_LONGDIV && mLongDivCharIndex >= 0) ||
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(mask == NOTATION_RADICAL && mRadicalCharIndex >= 0))
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return NS_OK;
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// No need to track the style context given to our MathML chars.
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// The Style System will use Get/SetAdditionalStyleContext() to keep it
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// up-to-date if dynamic changes arise.
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uint32_t i = mMathMLChar.Length();
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nsAutoString Char;
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if (!mMathMLChar.AppendElement())
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return NS_ERROR_OUT_OF_MEMORY;
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if (mask == NOTATION_LONGDIV) {
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Char.Assign(kLongDivChar);
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mLongDivCharIndex = i;
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} else if (mask == NOTATION_RADICAL) {
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Char.Assign(kRadicalChar);
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mRadicalCharIndex = i;
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}
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nsPresContext *presContext = PresContext();
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mMathMLChar[i].SetData(presContext, Char);
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ResolveMathMLCharStyle(presContext, mContent, mStyleContext, &mMathMLChar[i]);
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return NS_OK;
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}
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/*
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* Add a notation to draw, if the argument is the name of a known notation.
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* @param aNotation string name of a notation
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*/
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nsresult nsMathMLmencloseFrame::AddNotation(const nsAString& aNotation)
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{
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nsresult rv;
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if (aNotation.EqualsLiteral("longdiv")) {
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rv = AllocateMathMLChar(NOTATION_LONGDIV);
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NS_ENSURE_SUCCESS(rv, rv);
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mNotationsToDraw |= NOTATION_LONGDIV;
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} else if (aNotation.EqualsLiteral("actuarial")) {
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mNotationsToDraw |= (NOTATION_RIGHT | NOTATION_TOP);
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} else if (aNotation.EqualsLiteral("radical")) {
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rv = AllocateMathMLChar(NOTATION_RADICAL);
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NS_ENSURE_SUCCESS(rv, rv);
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mNotationsToDraw |= NOTATION_RADICAL;
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} else if (aNotation.EqualsLiteral("box")) {
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mNotationsToDraw |= (NOTATION_LEFT | NOTATION_RIGHT |
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NOTATION_TOP | NOTATION_BOTTOM);
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} else if (aNotation.EqualsLiteral("roundedbox")) {
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mNotationsToDraw |= NOTATION_ROUNDEDBOX;
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} else if (aNotation.EqualsLiteral("circle")) {
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mNotationsToDraw |= NOTATION_CIRCLE;
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} else if (aNotation.EqualsLiteral("left")) {
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mNotationsToDraw |= NOTATION_LEFT;
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} else if (aNotation.EqualsLiteral("right")) {
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mNotationsToDraw |= NOTATION_RIGHT;
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} else if (aNotation.EqualsLiteral("top")) {
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mNotationsToDraw |= NOTATION_TOP;
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} else if (aNotation.EqualsLiteral("bottom")) {
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mNotationsToDraw |= NOTATION_BOTTOM;
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} else if (aNotation.EqualsLiteral("updiagonalstrike")) {
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mNotationsToDraw |= NOTATION_UPDIAGONALSTRIKE;
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} else if (aNotation.EqualsLiteral("updiagonalarrow")) {
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mNotationsToDraw |= NOTATION_UPDIAGONALARROW;
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} else if (aNotation.EqualsLiteral("downdiagonalstrike")) {
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mNotationsToDraw |= NOTATION_DOWNDIAGONALSTRIKE;
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} else if (aNotation.EqualsLiteral("verticalstrike")) {
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mNotationsToDraw |= NOTATION_VERTICALSTRIKE;
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} else if (aNotation.EqualsLiteral("horizontalstrike")) {
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mNotationsToDraw |= NOTATION_HORIZONTALSTRIKE;
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} else if (aNotation.EqualsLiteral("madruwb")) {
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mNotationsToDraw |= (NOTATION_RIGHT | NOTATION_BOTTOM);
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} else if (aNotation.EqualsLiteral("phasorangle")) {
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mNotationsToDraw |= (NOTATION_BOTTOM | NOTATION_PHASORANGLE);
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}
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return NS_OK;
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}
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/*
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* Initialize the list of notations to draw
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*/
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void nsMathMLmencloseFrame::InitNotations()
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{
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mNotationsToDraw = 0;
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mLongDivCharIndex = mRadicalCharIndex = -1;
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mMathMLChar.Clear();
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nsAutoString value;
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if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::notation_, value)) {
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// parse the notation attribute
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nsWhitespaceTokenizer tokenizer(value);
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while (tokenizer.hasMoreTokens())
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AddNotation(tokenizer.nextToken());
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if (IsToDraw(NOTATION_UPDIAGONALARROW)) {
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// For <menclose notation="updiagonalstrike updiagonalarrow">, if
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// the two notations are drawn then the strike line may cause the point of
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// the arrow to be too wide. Hence we will only draw the updiagonalarrow
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// and the arrow shaft may be thought to be the updiagonalstrike.
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mNotationsToDraw &= ~NOTATION_UPDIAGONALSTRIKE;
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}
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} else {
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// default: longdiv
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if (NS_FAILED(AllocateMathMLChar(NOTATION_LONGDIV)))
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return;
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mNotationsToDraw = NOTATION_LONGDIV;
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}
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}
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NS_IMETHODIMP
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nsMathMLmencloseFrame::InheritAutomaticData(nsIFrame* aParent)
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{
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// let the base class get the default from our parent
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nsMathMLContainerFrame::InheritAutomaticData(aParent);
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mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
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InitNotations();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMathMLmencloseFrame::TransmitAutomaticData()
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{
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if (IsToDraw(NOTATION_RADICAL)) {
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// The TeXBook (Ch 17. p.141) says that \sqrt is cramped
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UpdatePresentationDataFromChildAt(0, -1,
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NS_MATHML_COMPRESSED,
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NS_MATHML_COMPRESSED);
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}
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return NS_OK;
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}
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void
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nsMathMLmencloseFrame::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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/////////////
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// paint the menclosed content
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nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
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if (NS_MATHML_HAS_ERROR(mPresentationData.flags))
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return;
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nsRect mencloseRect = nsIFrame::GetRect();
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mencloseRect.x = mencloseRect.y = 0;
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if (IsToDraw(NOTATION_RADICAL)) {
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mMathMLChar[mRadicalCharIndex].Display(aBuilder, this, aLists, 0);
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nsRect rect;
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mMathMLChar[mRadicalCharIndex].GetRect(rect);
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rect.MoveBy(StyleVisibility()->mDirection ? -mContentWidth : rect.width, 0);
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rect.SizeTo(mContentWidth, mRuleThickness);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_PHASORANGLE)) {
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DisplayNotation(aBuilder, this, mencloseRect, aLists,
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mRuleThickness, NOTATION_PHASORANGLE);
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}
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if (IsToDraw(NOTATION_LONGDIV)) {
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mMathMLChar[mLongDivCharIndex].Display(aBuilder, this, aLists, 1);
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nsRect rect;
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mMathMLChar[mLongDivCharIndex].GetRect(rect);
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rect.SizeTo(rect.width + mContentWidth, mRuleThickness);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_TOP)) {
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nsRect rect(0, 0, mencloseRect.width, mRuleThickness);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_BOTTOM)) {
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nsRect rect(0, mencloseRect.height - mRuleThickness,
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mencloseRect.width, mRuleThickness);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_LEFT)) {
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nsRect rect(0, 0, mRuleThickness, mencloseRect.height);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_RIGHT)) {
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nsRect rect(mencloseRect.width - mRuleThickness, 0,
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mRuleThickness, mencloseRect.height);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_ROUNDEDBOX)) {
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DisplayNotation(aBuilder, this, mencloseRect, aLists,
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mRuleThickness, NOTATION_ROUNDEDBOX);
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}
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if (IsToDraw(NOTATION_CIRCLE)) {
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DisplayNotation(aBuilder, this, mencloseRect, aLists,
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mRuleThickness, NOTATION_CIRCLE);
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}
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if (IsToDraw(NOTATION_UPDIAGONALSTRIKE)) {
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DisplayNotation(aBuilder, this, mencloseRect, aLists,
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mRuleThickness, NOTATION_UPDIAGONALSTRIKE);
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}
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if (IsToDraw(NOTATION_UPDIAGONALARROW)) {
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DisplayNotation(aBuilder, this, mencloseRect, aLists,
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mRuleThickness, NOTATION_UPDIAGONALARROW);
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}
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if (IsToDraw(NOTATION_DOWNDIAGONALSTRIKE)) {
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DisplayNotation(aBuilder, this, mencloseRect, aLists,
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mRuleThickness, NOTATION_DOWNDIAGONALSTRIKE);
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}
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if (IsToDraw(NOTATION_HORIZONTALSTRIKE)) {
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nsRect rect(0, mencloseRect.height / 2 - mRuleThickness / 2,
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mencloseRect.width, mRuleThickness);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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if (IsToDraw(NOTATION_VERTICALSTRIKE)) {
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nsRect rect(mencloseRect.width / 2 - mRuleThickness / 2, 0,
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mRuleThickness, mencloseRect.height);
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DisplayBar(aBuilder, this, rect, aLists);
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}
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}
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/* virtual */ nsresult
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nsMathMLmencloseFrame::MeasureForWidth(nsRenderingContext& aRenderingContext,
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nsHTMLReflowMetrics& aDesiredSize)
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{
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return PlaceInternal(aRenderingContext, false, aDesiredSize, true);
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}
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/* virtual */ nsresult
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nsMathMLmencloseFrame::Place(nsRenderingContext& aRenderingContext,
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bool aPlaceOrigin,
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nsHTMLReflowMetrics& aDesiredSize)
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{
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return PlaceInternal(aRenderingContext, aPlaceOrigin, aDesiredSize, false);
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}
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/* virtual */ nsresult
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nsMathMLmencloseFrame::PlaceInternal(nsRenderingContext& aRenderingContext,
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bool aPlaceOrigin,
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nsHTMLReflowMetrics& aDesiredSize,
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bool aWidthOnly)
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{
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///////////////
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// Measure the size of our content using the base class to format like an
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// inferred mrow.
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nsHTMLReflowMetrics baseSize(aDesiredSize.GetWritingMode());
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nsresult rv =
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nsMathMLContainerFrame::Place(aRenderingContext, false, baseSize);
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if (NS_MATHML_HAS_ERROR(mPresentationData.flags) || NS_FAILED(rv)) {
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DidReflowChildren(GetFirstPrincipalChild());
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return rv;
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}
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nsBoundingMetrics bmBase = baseSize.mBoundingMetrics;
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nscoord dx_left = 0, dx_right = 0;
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nsBoundingMetrics bmLongdivChar, bmRadicalChar;
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nscoord radicalAscent = 0, radicalDescent = 0;
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nscoord longdivAscent = 0, longdivDescent = 0;
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nscoord psi = 0;
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///////////////
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// Thickness of bars and font metrics
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nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
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nscoord mEmHeight;
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nsRefPtr<nsFontMetrics> fm;
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nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
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aRenderingContext.SetFont(fm);
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GetRuleThickness(aRenderingContext, fm, mRuleThickness);
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GetEmHeight(fm, mEmHeight);
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char16_t one = '1';
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nsBoundingMetrics bmOne = aRenderingContext.GetBoundingMetrics(&one, 1);
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///////////////
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// General rules: the menclose element takes the size of the enclosed content.
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// We add a padding when needed.
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// determine padding & psi
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nscoord padding = 3 * mRuleThickness;
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nscoord delta = padding % onePixel;
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if (delta)
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padding += onePixel - delta; // round up
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if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
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nscoord phi;
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// Rule 11, App. G, TeXbook
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// psi = clearance between rule and content
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if (StyleFont()->mMathDisplay == NS_MATHML_DISPLAYSTYLE_BLOCK)
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phi = fm->XHeight();
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else
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phi = mRuleThickness;
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psi = mRuleThickness + phi / 4;
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delta = psi % onePixel;
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if (delta)
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psi += onePixel - delta; // round up
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}
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if (mRuleThickness < onePixel)
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mRuleThickness = onePixel;
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// Set horizontal parameters
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if (IsToDraw(NOTATION_ROUNDEDBOX) ||
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IsToDraw(NOTATION_TOP) ||
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IsToDraw(NOTATION_LEFT) ||
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IsToDraw(NOTATION_BOTTOM) ||
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IsToDraw(NOTATION_CIRCLE))
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dx_left = padding;
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if (IsToDraw(NOTATION_ROUNDEDBOX) ||
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IsToDraw(NOTATION_TOP) ||
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IsToDraw(NOTATION_RIGHT) ||
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IsToDraw(NOTATION_BOTTOM) ||
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IsToDraw(NOTATION_CIRCLE))
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dx_right = padding;
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// Set vertical parameters
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if (IsToDraw(NOTATION_RIGHT) ||
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IsToDraw(NOTATION_LEFT) ||
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IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
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IsToDraw(NOTATION_UPDIAGONALARROW) ||
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IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
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IsToDraw(NOTATION_VERTICALSTRIKE) ||
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IsToDraw(NOTATION_CIRCLE) ||
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IsToDraw(NOTATION_ROUNDEDBOX) ||
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IsToDraw(NOTATION_RADICAL) ||
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IsToDraw(NOTATION_LONGDIV) ||
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IsToDraw(NOTATION_PHASORANGLE)) {
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// set a minimal value for the base height
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bmBase.ascent = std::max(bmOne.ascent, bmBase.ascent);
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bmBase.descent = std::max(0, bmBase.descent);
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}
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mBoundingMetrics.ascent = bmBase.ascent;
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mBoundingMetrics.descent = bmBase.descent;
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if (IsToDraw(NOTATION_ROUNDEDBOX) ||
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IsToDraw(NOTATION_TOP) ||
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IsToDraw(NOTATION_LEFT) ||
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IsToDraw(NOTATION_RIGHT) ||
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IsToDraw(NOTATION_CIRCLE))
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mBoundingMetrics.ascent += padding;
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if (IsToDraw(NOTATION_ROUNDEDBOX) ||
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IsToDraw(NOTATION_LEFT) ||
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IsToDraw(NOTATION_RIGHT) ||
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IsToDraw(NOTATION_BOTTOM) ||
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IsToDraw(NOTATION_CIRCLE))
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mBoundingMetrics.descent += padding;
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///////////////
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// phasorangle notation
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if (IsToDraw(NOTATION_PHASORANGLE)) {
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nscoord phasorangleWidth = kPhasorangleWidth * mRuleThickness;
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// Update horizontal parameters
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dx_left = std::max(dx_left, phasorangleWidth);
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}
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///////////////
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// updiagonal arrow notation. We need enough space at the top right corner to
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// draw the arrow head.
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if (IsToDraw(NOTATION_UPDIAGONALARROW)) {
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// This is an estimate, see nsDisplayNotation::Paint for the exact head size
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nscoord arrowHeadSize = kArrowHeadSize * mRuleThickness;
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// We want that the arrow shaft strikes the menclose content and that the
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// arrow head does not overlap with that content. Hence we add some space
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// on the right. We don't add space on the top but only ensure that the
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// ascent is large enough.
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dx_right = std::max(dx_right, arrowHeadSize);
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mBoundingMetrics.ascent = std::max(mBoundingMetrics.ascent, arrowHeadSize);
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}
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///////////////
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// circle notation: we don't want the ellipse to overlap the enclosed
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// content. Hence, we need to increase the size of the bounding box by a
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// factor of at least sqrt(2).
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if (IsToDraw(NOTATION_CIRCLE)) {
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double ratio = (sqrt(2.0) - 1.0) / 2.0;
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nscoord padding2;
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// Update horizontal parameters
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padding2 = ratio * bmBase.width;
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dx_left = std::max(dx_left, padding2);
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dx_right = std::max(dx_right, padding2);
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// Update vertical parameters
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padding2 = ratio * (bmBase.ascent + bmBase.descent);
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mBoundingMetrics.ascent = std::max(mBoundingMetrics.ascent,
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bmBase.ascent + padding2);
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mBoundingMetrics.descent = std::max(mBoundingMetrics.descent,
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bmBase.descent + padding2);
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}
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///////////////
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// longdiv notation:
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if (IsToDraw(NOTATION_LONGDIV)) {
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if (aWidthOnly) {
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nscoord longdiv_width = mMathMLChar[mLongDivCharIndex].
|
|
GetMaxWidth(PresContext(), aRenderingContext);
|
|
|
|
// Update horizontal parameters
|
|
dx_left = std::max(dx_left, longdiv_width);
|
|
} else {
|
|
// Stretch the parenthesis to the appropriate height if it is not
|
|
// big enough.
|
|
nsBoundingMetrics contSize = bmBase;
|
|
contSize.ascent = mRuleThickness;
|
|
contSize.descent = bmBase.ascent + bmBase.descent + psi;
|
|
|
|
// height(longdiv) should be >= height(base) + psi + mRuleThickness
|
|
mMathMLChar[mLongDivCharIndex].Stretch(PresContext(), aRenderingContext,
|
|
NS_STRETCH_DIRECTION_VERTICAL,
|
|
contSize, bmLongdivChar,
|
|
NS_STRETCH_LARGER, false);
|
|
mMathMLChar[mLongDivCharIndex].GetBoundingMetrics(bmLongdivChar);
|
|
|
|
// Update horizontal parameters
|
|
dx_left = std::max(dx_left, bmLongdivChar.width);
|
|
|
|
// Update vertical parameters
|
|
longdivAscent = bmBase.ascent + psi + mRuleThickness;
|
|
longdivDescent = std::max(bmBase.descent,
|
|
(bmLongdivChar.ascent + bmLongdivChar.descent -
|
|
longdivAscent));
|
|
|
|
mBoundingMetrics.ascent = std::max(mBoundingMetrics.ascent,
|
|
longdivAscent);
|
|
mBoundingMetrics.descent = std::max(mBoundingMetrics.descent,
|
|
longdivDescent);
|
|
}
|
|
}
|
|
|
|
///////////////
|
|
// radical notation:
|
|
if (IsToDraw(NOTATION_RADICAL)) {
|
|
nscoord *dx_leading = StyleVisibility()->mDirection ? &dx_right : &dx_left;
|
|
|
|
if (aWidthOnly) {
|
|
nscoord radical_width = mMathMLChar[mRadicalCharIndex].
|
|
GetMaxWidth(PresContext(), aRenderingContext);
|
|
|
|
// Update horizontal parameters
|
|
*dx_leading = std::max(*dx_leading, radical_width);
|
|
} else {
|
|
// Stretch the radical symbol to the appropriate height if it is not
|
|
// big enough.
|
|
nsBoundingMetrics contSize = bmBase;
|
|
contSize.ascent = mRuleThickness;
|
|
contSize.descent = bmBase.ascent + bmBase.descent + psi;
|
|
|
|
// height(radical) should be >= height(base) + psi + mRuleThickness
|
|
mMathMLChar[mRadicalCharIndex].Stretch(PresContext(), aRenderingContext,
|
|
NS_STRETCH_DIRECTION_VERTICAL,
|
|
contSize, bmRadicalChar,
|
|
NS_STRETCH_LARGER,
|
|
StyleVisibility()->mDirection);
|
|
mMathMLChar[mRadicalCharIndex].GetBoundingMetrics(bmRadicalChar);
|
|
|
|
// Update horizontal parameters
|
|
*dx_leading = std::max(*dx_leading, bmRadicalChar.width);
|
|
|
|
// Update vertical parameters
|
|
radicalAscent = bmBase.ascent + psi + mRuleThickness;
|
|
radicalDescent = std::max(bmBase.descent,
|
|
(bmRadicalChar.ascent + bmRadicalChar.descent -
|
|
radicalAscent));
|
|
|
|
mBoundingMetrics.ascent = std::max(mBoundingMetrics.ascent,
|
|
radicalAscent);
|
|
mBoundingMetrics.descent = std::max(mBoundingMetrics.descent,
|
|
radicalDescent);
|
|
}
|
|
}
|
|
|
|
///////////////
|
|
//
|
|
if (IsToDraw(NOTATION_CIRCLE) ||
|
|
IsToDraw(NOTATION_ROUNDEDBOX) ||
|
|
(IsToDraw(NOTATION_LEFT) && IsToDraw(NOTATION_RIGHT))) {
|
|
// center the menclose around the content (horizontally)
|
|
dx_left = dx_right = std::max(dx_left, dx_right);
|
|
}
|
|
|
|
///////////////
|
|
// The maximum size is now computed: set the remaining parameters
|
|
mBoundingMetrics.width = dx_left + bmBase.width + dx_right;
|
|
|
|
mBoundingMetrics.leftBearing = std::min(0, dx_left + bmBase.leftBearing);
|
|
mBoundingMetrics.rightBearing =
|
|
std::max(mBoundingMetrics.width, dx_left + bmBase.rightBearing);
|
|
|
|
aDesiredSize.Width() = mBoundingMetrics.width;
|
|
|
|
aDesiredSize.SetBlockStartAscent(std::max(mBoundingMetrics.ascent,
|
|
baseSize.BlockStartAscent()));
|
|
aDesiredSize.Height() = aDesiredSize.BlockStartAscent() +
|
|
std::max(mBoundingMetrics.descent,
|
|
baseSize.Height() - baseSize.BlockStartAscent());
|
|
|
|
if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
|
|
// get the leading to be left at the top of the resulting frame
|
|
// this seems more reliable than using fm->GetLeading() on suspicious
|
|
// fonts
|
|
nscoord leading = nscoord(0.2f * mEmHeight);
|
|
nscoord desiredSizeAscent = aDesiredSize.BlockStartAscent();
|
|
nscoord desiredSizeDescent = aDesiredSize.Height() -
|
|
aDesiredSize.BlockStartAscent();
|
|
|
|
if (IsToDraw(NOTATION_LONGDIV)) {
|
|
desiredSizeAscent = std::max(desiredSizeAscent,
|
|
longdivAscent + leading);
|
|
desiredSizeDescent = std::max(desiredSizeDescent,
|
|
longdivDescent + mRuleThickness);
|
|
}
|
|
|
|
if (IsToDraw(NOTATION_RADICAL)) {
|
|
desiredSizeAscent = std::max(desiredSizeAscent,
|
|
radicalAscent + leading);
|
|
desiredSizeDescent = std::max(desiredSizeDescent,
|
|
radicalDescent + mRuleThickness);
|
|
}
|
|
|
|
aDesiredSize.SetBlockStartAscent(desiredSizeAscent);
|
|
aDesiredSize.Height() = desiredSizeAscent + desiredSizeDescent;
|
|
}
|
|
|
|
if (IsToDraw(NOTATION_CIRCLE) ||
|
|
IsToDraw(NOTATION_ROUNDEDBOX) ||
|
|
(IsToDraw(NOTATION_TOP) && IsToDraw(NOTATION_BOTTOM))) {
|
|
// center the menclose around the content (vertically)
|
|
nscoord dy = std::max(aDesiredSize.BlockStartAscent() - bmBase.ascent,
|
|
aDesiredSize.Height() -
|
|
aDesiredSize.BlockStartAscent() - bmBase.descent);
|
|
|
|
aDesiredSize.SetBlockStartAscent(bmBase.ascent + dy);
|
|
aDesiredSize.Height() = aDesiredSize.BlockStartAscent() + bmBase.descent + dy;
|
|
}
|
|
|
|
// Update mBoundingMetrics ascent/descent
|
|
if (IsToDraw(NOTATION_TOP) ||
|
|
IsToDraw(NOTATION_RIGHT) ||
|
|
IsToDraw(NOTATION_LEFT) ||
|
|
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
|
|
IsToDraw(NOTATION_UPDIAGONALARROW) ||
|
|
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
|
|
IsToDraw(NOTATION_VERTICALSTRIKE) ||
|
|
IsToDraw(NOTATION_CIRCLE) ||
|
|
IsToDraw(NOTATION_ROUNDEDBOX))
|
|
mBoundingMetrics.ascent = aDesiredSize.BlockStartAscent();
|
|
|
|
if (IsToDraw(NOTATION_BOTTOM) ||
|
|
IsToDraw(NOTATION_RIGHT) ||
|
|
IsToDraw(NOTATION_LEFT) ||
|
|
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
|
|
IsToDraw(NOTATION_UPDIAGONALARROW) ||
|
|
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
|
|
IsToDraw(NOTATION_VERTICALSTRIKE) ||
|
|
IsToDraw(NOTATION_CIRCLE) ||
|
|
IsToDraw(NOTATION_ROUNDEDBOX))
|
|
mBoundingMetrics.descent = aDesiredSize.Height() - aDesiredSize.BlockStartAscent();
|
|
|
|
// phasorangle notation:
|
|
// move up from the bottom by the angled line height
|
|
if (IsToDraw(NOTATION_PHASORANGLE))
|
|
mBoundingMetrics.ascent = std::max(mBoundingMetrics.ascent, 2 * kPhasorangleWidth * mRuleThickness - mBoundingMetrics.descent);
|
|
|
|
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
|
|
|
|
mReference.x = 0;
|
|
mReference.y = aDesiredSize.BlockStartAscent();
|
|
|
|
if (aPlaceOrigin) {
|
|
//////////////////
|
|
// Set position and size of MathMLChars
|
|
if (IsToDraw(NOTATION_LONGDIV))
|
|
mMathMLChar[mLongDivCharIndex].SetRect(nsRect(dx_left -
|
|
bmLongdivChar.width,
|
|
aDesiredSize.BlockStartAscent() -
|
|
longdivAscent,
|
|
bmLongdivChar.width,
|
|
bmLongdivChar.ascent +
|
|
bmLongdivChar.descent));
|
|
|
|
if (IsToDraw(NOTATION_RADICAL)) {
|
|
nscoord dx = (StyleVisibility()->mDirection ?
|
|
dx_left + bmBase.width : dx_left - bmRadicalChar.width);
|
|
|
|
mMathMLChar[mRadicalCharIndex].SetRect(nsRect(dx,
|
|
aDesiredSize.BlockStartAscent() -
|
|
radicalAscent,
|
|
bmRadicalChar.width,
|
|
bmRadicalChar.ascent +
|
|
bmRadicalChar.descent));
|
|
}
|
|
|
|
mContentWidth = bmBase.width;
|
|
|
|
//////////////////
|
|
// Finish reflowing child frames
|
|
PositionRowChildFrames(dx_left, aDesiredSize.BlockStartAscent());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nscoord
|
|
nsMathMLmencloseFrame::FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize)
|
|
{
|
|
nscoord gap = nsMathMLContainerFrame::FixInterFrameSpacing(aDesiredSize);
|
|
if (!gap)
|
|
return 0;
|
|
|
|
// Move the MathML characters
|
|
nsRect rect;
|
|
for (uint32_t i = 0; i < mMathMLChar.Length(); i++) {
|
|
mMathMLChar[i].GetRect(rect);
|
|
rect.MoveBy(gap, 0);
|
|
mMathMLChar[i].SetRect(rect);
|
|
}
|
|
|
|
return gap;
|
|
}
|
|
|
|
nsresult
|
|
nsMathMLmencloseFrame::AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType)
|
|
{
|
|
if (aAttribute == nsGkAtoms::notation_) {
|
|
InitNotations();
|
|
}
|
|
|
|
return nsMathMLContainerFrame::
|
|
AttributeChanged(aNameSpaceID, aAttribute, aModType);
|
|
}
|
|
|
|
//////////////////
|
|
// the Style System will use these to pass the proper style context to our
|
|
// MathMLChar
|
|
nsStyleContext*
|
|
nsMathMLmencloseFrame::GetAdditionalStyleContext(int32_t aIndex) const
|
|
{
|
|
int32_t len = mMathMLChar.Length();
|
|
if (aIndex >= 0 && aIndex < len)
|
|
return mMathMLChar[aIndex].GetStyleContext();
|
|
else
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
nsMathMLmencloseFrame::SetAdditionalStyleContext(int32_t aIndex,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
int32_t len = mMathMLChar.Length();
|
|
if (aIndex >= 0 && aIndex < len)
|
|
mMathMLChar[aIndex].SetStyleContext(aStyleContext);
|
|
}
|
|
|
|
class nsDisplayNotation : public nsDisplayItem
|
|
{
|
|
public:
|
|
nsDisplayNotation(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, const nsRect& aRect,
|
|
nscoord aThickness, nsMencloseNotation aType)
|
|
: nsDisplayItem(aBuilder, aFrame), mRect(aRect),
|
|
mThickness(aThickness), mType(aType) {
|
|
MOZ_COUNT_CTOR(nsDisplayNotation);
|
|
}
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
virtual ~nsDisplayNotation() {
|
|
MOZ_COUNT_DTOR(nsDisplayNotation);
|
|
}
|
|
#endif
|
|
|
|
virtual void Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) MOZ_OVERRIDE;
|
|
NS_DISPLAY_DECL_NAME("MathMLMencloseNotation", TYPE_MATHML_MENCLOSE_NOTATION)
|
|
|
|
private:
|
|
nsRect mRect;
|
|
nscoord mThickness;
|
|
nsMencloseNotation mType;
|
|
};
|
|
|
|
void nsDisplayNotation::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx)
|
|
{
|
|
// get the gfxRect
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
gfxRect rect = presContext->AppUnitsToGfxUnits(mRect + ToReferenceFrame());
|
|
|
|
// paint the frame with the current text color
|
|
aCtx->SetColor(mFrame->GetVisitedDependentColor(eCSSProperty_color));
|
|
|
|
// change line width to mThickness
|
|
gfxContext *gfxCtx = aCtx->ThebesContext();
|
|
gfxFloat e = presContext->AppUnitsToGfxUnits(mThickness);
|
|
gfxCtx->Save();
|
|
gfxCtx->SetLineWidth(e);
|
|
|
|
rect.Deflate(e / 2.0);
|
|
|
|
switch(mType)
|
|
{
|
|
case NOTATION_CIRCLE:
|
|
gfxCtx->NewPath();
|
|
gfxCtx->Ellipse(rect.Center(), rect.Size());
|
|
gfxCtx->Stroke();
|
|
break;
|
|
|
|
case NOTATION_ROUNDEDBOX:
|
|
gfxCtx->NewPath();
|
|
gfxCtx->RoundedRectangle(rect, gfxCornerSizes(3 * e), true);
|
|
gfxCtx->Stroke();
|
|
break;
|
|
|
|
case NOTATION_UPDIAGONALSTRIKE:
|
|
gfxCtx->NewPath();
|
|
gfxCtx->Line(rect.BottomLeft(), rect.TopRight());
|
|
gfxCtx->Stroke();
|
|
break;
|
|
|
|
case NOTATION_DOWNDIAGONALSTRIKE:
|
|
gfxCtx->NewPath();
|
|
gfxCtx->Line(rect.TopLeft(), rect.BottomRight());
|
|
gfxCtx->Stroke();
|
|
break;
|
|
|
|
case NOTATION_UPDIAGONALARROW: {
|
|
// Compute some parameters to draw the updiagonalarrow. The values below
|
|
// are taken from MathJax's HTML-CSS output.
|
|
gfxFloat W = rect.Width(); gfxFloat H = rect.Height();
|
|
gfxFloat l = sqrt(W*W + H*H);
|
|
gfxFloat f = gfxFloat(kArrowHeadSize) * e / l;
|
|
gfxFloat w = W * f; gfxFloat h = H * f;
|
|
|
|
// Draw the arrow shaft
|
|
gfxCtx->NewPath();
|
|
gfxCtx->Line(rect.BottomLeft(), rect.TopRight() + gfxPoint(-.7*w, .7*h));
|
|
gfxCtx->Stroke();
|
|
|
|
// Draw the arrow head
|
|
gfxCtx->NewPath();
|
|
gfxPoint p[] = {
|
|
rect.TopRight(),
|
|
rect.TopRight() + gfxPoint(-w -.4*h, std::max(-e / 2.0, h - .4*w)),
|
|
rect.TopRight() + gfxPoint(-.7*w, .7*h),
|
|
rect.TopRight() + gfxPoint(std::min(e / 2.0, -w + .4*h), h + .4*w),
|
|
rect.TopRight()
|
|
};
|
|
gfxCtx->Polygon(p, MOZ_ARRAY_LENGTH(p));
|
|
gfxCtx->Fill();
|
|
}
|
|
break;
|
|
|
|
case NOTATION_PHASORANGLE: {
|
|
// Compute some parameters to draw the angled line,
|
|
// that uses a slope of 2 (angle = tan^-1(2)).
|
|
// H = w * tan(angle) = w * 2
|
|
gfxFloat w = gfxFloat(kPhasorangleWidth) * e;
|
|
gfxFloat H = 2 * w;
|
|
|
|
// Draw the angled line
|
|
gfxCtx->NewPath();
|
|
gfxCtx->Line(rect.BottomLeft(), rect.BottomLeft() + gfxPoint(w, -H));
|
|
gfxCtx->Stroke();
|
|
break;
|
|
}
|
|
|
|
default:
|
|
NS_NOTREACHED("This notation can not be drawn using nsDisplayNotation");
|
|
break;
|
|
}
|
|
|
|
gfxCtx->Restore();
|
|
}
|
|
|
|
void
|
|
nsMathMLmencloseFrame::DisplayNotation(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, const nsRect& aRect,
|
|
const nsDisplayListSet& aLists,
|
|
nscoord aThickness,
|
|
nsMencloseNotation aType)
|
|
{
|
|
if (!aFrame->StyleVisibility()->IsVisible() || aRect.IsEmpty() ||
|
|
aThickness <= 0)
|
|
return;
|
|
|
|
aLists.Content()->AppendNewToTop(new (aBuilder)
|
|
nsDisplayNotation(aBuilder, aFrame, aRect, aThickness, aType));
|
|
}
|