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gecko-dev/layout/generic/MathVariantTextRunFactory.cpp
Ehsan Akhgari 1b83407ce9 Bug 927728 - Part 1: Replace PRUnichar with char16_t; r=roc 
This patch was automatically generated by the following script:

#!/bin/bash
# Command to convert PRUnichar to char16_t

function convert() {
echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
       ! -wholename "*security/nss*" \
       ! -wholename "*modules/libmar*" \
       ! -wholename "*/.hg*" \
       ! -wholename "obj-ff-dbg*" \
       ! -name prtypes.h \
       ! -name Char16.h \
         -type f \
      \( -iname "*.cpp" \
         -o -iname "*.h" \
         -o -iname "*.c" \
         -o -iname "*.cc" \
         -o -iname "*.idl" \
         -o -iname "*.ipdl" \
         -o -iname "*.ipdlh" \
         -o -iname "*.mm" \) | \
    xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}

convert PRUnichar char16_t
2014-01-04 10:02:17 -05:00

665 lines
22 KiB
C++
Raw Blame History

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MathVariantTextRunFactory.h"
#include "mozilla/ArrayUtils.h"
#include "nsStyleConsts.h"
#include "nsStyleContext.h"
#include "nsTextFrameUtils.h"
using namespace mozilla;
/*
Entries for the mathvariant lookup tables. mKey represents the Unicode
character to be transformed and is used for searching the tables.
mReplacement represents the mapped mathvariant Unicode character.
*/
typedef struct
{
uint32_t mKey;
uint32_t mReplacement;
} MathVarMapping;
/*
Lookup tables for use with mathvariant mappings to transform a unicode
character point to another unicode character that indicates the proper output.
mKey represents one of two concepts.
1. In the Latin table it represents a hole in the mathematical alphanumeric
block, where the character that should occupy that position is located
elsewhere.
2. It represents an Arabic letter.
As a replacement, 0 is reserved to indicate no mapping was found.
*/
static const MathVarMapping gArabicInitialMapTable[] = {
{ 0x628, 0x1EE21 },
{ 0x62A, 0x1EE35 },
{ 0x62B, 0x1EE36 },
{ 0x62C, 0x1EE22 },
{ 0x62D, 0x1EE27 },
{ 0x62E, 0x1EE37 },
{ 0x633, 0x1EE2E },
{ 0x634, 0x1EE34 },
{ 0x635, 0x1EE31 },
{ 0x636, 0x1EE39 },
{ 0x639, 0x1EE2F },
{ 0x63A, 0x1EE3B },
{ 0x641, 0x1EE30 },
{ 0x642, 0x1EE32 },
{ 0x643, 0x1EE2A },
{ 0x644, 0x1EE2B },
{ 0x645, 0x1EE2C },
{ 0x646, 0x1EE2D },
{ 0x647, 0x1EE24 },
{ 0x64A, 0x1EE29 }
};
static const MathVarMapping gArabicTailedMapTable[] = {
{ 0x62C, 0x1EE42 },
{ 0x62D, 0x1EE47 },
{ 0x62E, 0x1EE57 },
{ 0x633, 0x1EE4E },
{ 0x634, 0x1EE54 },
{ 0x635, 0x1EE51 },
{ 0x636, 0x1EE59 },
{ 0x639, 0x1EE4F },
{ 0x63A, 0x1EE5B },
{ 0x642, 0x1EE52 },
{ 0x644, 0x1EE4B },
{ 0x646, 0x1EE4D },
{ 0x64A, 0x1EE49 },
{ 0x66F, 0x1EE5F },
{ 0x6BA, 0x1EE5D }
};
static const MathVarMapping gArabicStretchedMapTable[] = {
{ 0x628, 0x1EE61 },
{ 0x62A, 0x1EE75 },
{ 0x62B, 0x1EE76 },
{ 0x62C, 0x1EE62 },
{ 0x62D, 0x1EE67 },
{ 0x62E, 0x1EE77 },
{ 0x633, 0x1EE6E },
{ 0x634, 0x1EE74 },
{ 0x635, 0x1EE71 },
{ 0x636, 0x1EE79 },
{ 0x637, 0x1EE68 },
{ 0x638, 0x1EE7A },
{ 0x639, 0x1EE6F },
{ 0x63A, 0x1EE7B },
{ 0x641, 0x1EE70 },
{ 0x642, 0x1EE72 },
{ 0x643, 0x1EE6A },
{ 0x645, 0x1EE6C },
{ 0x646, 0x1EE6D },
{ 0x647, 0x1EE64 },
{ 0x64A, 0x1EE69 },
{ 0x66E, 0x1EE7C },
{ 0x6A1, 0x1EE7E }
};
static const MathVarMapping gArabicLoopedMapTable[] = {
{ 0x627, 0x1EE80 },
{ 0x628, 0x1EE81 },
{ 0x62A, 0x1EE95 },
{ 0x62B, 0x1EE96 },
{ 0x62C, 0x1EE82 },
{ 0x62D, 0x1EE87 },
{ 0x62E, 0x1EE97 },
{ 0x62F, 0x1EE83 },
{ 0x630, 0x1EE98 },
{ 0x631, 0x1EE93 },
{ 0x632, 0x1EE86 },
{ 0x633, 0x1EE8E },
{ 0x634, 0x1EE94 },
{ 0x635, 0x1EE91 },
{ 0x636, 0x1EE99 },
{ 0x637, 0x1EE88 },
{ 0x638, 0x1EE9A },
{ 0x639, 0x1EE8F },
{ 0x63A, 0x1EE9B },
{ 0x641, 0x1EE90 },
{ 0x642, 0x1EE92 },
{ 0x644, 0x1EE8B },
{ 0x645, 0x1EE8C },
{ 0x646, 0x1EE8D },
{ 0x647, 0x1EE84 },
{ 0x648, 0x1EE85 },
{ 0x64A, 0x1EE89 }
};
static const MathVarMapping gArabicDoubleMapTable[] = {
{ 0x628, 0x1EEA1 },
{ 0x62A, 0x1EEB5 },
{ 0x62B, 0x1EEB6 },
{ 0x62C, 0x1EEA2 },
{ 0x62D, 0x1EEA7 },
{ 0x62E, 0x1EEB7 },
{ 0x62F, 0x1EEA3 },
{ 0x630, 0x1EEB8 },
{ 0x631, 0x1EEB3 },
{ 0x632, 0x1EEA6 },
{ 0x633, 0x1EEAE },
{ 0x634, 0x1EEB4 },
{ 0x635, 0x1EEB1 },
{ 0x636, 0x1EEB9 },
{ 0x637, 0x1EEA8 },
{ 0x638, 0x1EEBA },
{ 0x639, 0x1EEAF },
{ 0x63A, 0x1EEBB },
{ 0x641, 0x1EEB0 },
{ 0x642, 0x1EEB2 },
{ 0x644, 0x1EEAB },
{ 0x645, 0x1EEAC },
{ 0x646, 0x1EEAD },
{ 0x648, 0x1EEA5 },
{ 0x64A, 0x1EEA9 }
};
static const MathVarMapping gLatinExceptionMapTable[] = {
{ 0x1D455, 0x210E },
{ 0x1D49D, 0x212C },
{ 0x1D4A0, 0x2130 },
{ 0x1D4A1, 0x2131 },
{ 0x1D4A3, 0x210B },
{ 0x1D4A4, 0x2110 },
{ 0x1D4A7, 0x2112 },
{ 0x1D4A8, 0x2133 },
{ 0x1D4AD, 0x211B },
{ 0x1D4BA, 0x212F },
{ 0x1D4BC, 0x210A },
{ 0x1D4C4, 0x2134 },
{ 0x1D506, 0x212D },
{ 0x1D50B, 0x210C },
{ 0x1D50C, 0x2111 },
{ 0x1D515, 0x211C },
{ 0x1D51D, 0x2128 },
{ 0x1D53A, 0x2102 },
{ 0x1D53F, 0x210D },
{ 0x1D545, 0x2115 },
{ 0x1D547, 0x2119 },
{ 0x1D548, 0x211A },
{ 0x1D549, 0x211D },
{ 0x1D551, 0x2124 }
};
// Finds a MathVarMapping struct with the specified key (aKey) within aTable.
// aTable must be an array, whose length is specified by aNumElements
static uint32_t
MathvarMappingSearch(uint32_t aKey, const MathVarMapping* aTable, uint32_t aNumElements)
{
uint32_t low = 0;
uint32_t high = aNumElements;
while (high > low) {
uint32_t midPoint = (low+high) >> 1;
if (aKey == aTable[midPoint].mKey) {
return aTable[midPoint].mReplacement;
}
if (aKey > aTable[midPoint].mKey) {
low = midPoint + 1;
} else {
high = midPoint;
}
}
return 0;
}
#define GREEK_UPPER_THETA 0x03F4
#define HOLE_GREEK_UPPER_THETA 0x03A2
#define NABLA 0x2207
#define PARTIAL_DIFFERENTIAL 0x2202
#define GREEK_UPPER_ALPHA 0x0391
#define GREEK_UPPER_OMEGA 0x03A9
#define GREEK_LOWER_ALPHA 0x03B1
#define GREEK_LOWER_OMEGA 0x03C9
#define GREEK_LUNATE_EPSILON_SYMBOL 0x03F5
#define GREEK_THETA_SYMBOL 0x03D1
#define GREEK_KAPPA_SYMBOL 0x03F0
#define GREEK_PHI_SYMBOL 0x03D5
#define GREEK_RHO_SYMBOL 0x03F1
#define GREEK_PI_SYMBOL 0x03D6
#define GREEK_LETTER_DIGAMMA 0x03DC
#define GREEK_SMALL_LETTER_DIGAMMA 0x03DD
#define MATH_BOLD_CAPITAL_DIGAMMA 0x1D7CA
#define MATH_BOLD_SMALL_DIGAMMA 0x1D7CB
#define LATIN_SMALL_LETTER_DOTLESS_I 0x0131
#define LATIN_SMALL_LETTER_DOTLESS_J 0x0237
#define MATH_ITALIC_SMALL_DOTLESS_I 0x1D6A4
#define MATH_ITALIC_SMALL_DOTLESS_J 0x1D6A5
#define MATH_BOLD_UPPER_A 0x1D400
#define MATH_ITALIC_UPPER_A 0x1D434
#define MATH_BOLD_SMALL_A 0x1D41A
#define MATH_BOLD_UPPER_ALPHA 0x1D6A8
#define MATH_BOLD_SMALL_ALPHA 0x1D6C2
#define MATH_ITALIC_UPPER_ALPHA 0x1D6E2
#define MATH_BOLD_DIGIT_ZERO 0x1D7CE
#define MATH_DOUBLE_STRUCK_ZERO 0x1D7D8
#define MATH_BOLD_UPPER_THETA 0x1D6B9
#define MATH_BOLD_NABLA 0x1D6C1
#define MATH_BOLD_PARTIAL_DIFFERENTIAL 0x1D6DB
#define MATH_BOLD_EPSILON_SYMBOL 0x1D6DC
#define MATH_BOLD_THETA_SYMBOL 0x1D6DD
#define MATH_BOLD_KAPPA_SYMBOL 0x1D6DE
#define MATH_BOLD_PHI_SYMBOL 0x1D6DF
#define MATH_BOLD_RHO_SYMBOL 0x1D6E0
#define MATH_BOLD_PI_SYMBOL 0x1D6E1
/*
Performs the character mapping needed to implement MathML's mathvariant
attribute. It takes a unicode character and maps it to its appropriate
mathvariant counterpart specified by aMathVar. The mapped character is
typically located within Unicode's mathematical blocks (0x1D***, 0x1EE**) but
there are exceptions which this function accounts for.
Characters without a valid mapping or valid aMathvar value are returned
unaltered. Characters already in the mathematical blocks (or are one of the
exceptions) are never transformed.
Acceptable values for aMathVar are specified in layout/style/nsStyleConsts.h.
The transformable characters can be found at:
http://lists.w3.org/Archives/Public/www-math/2013Sep/0012.html and
https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
*/
static uint32_t
MathVariant(uint32_t aCh, uint8_t aMathVar)
{
uint32_t baseChar;
enum CharacterType {
kIsLatin,
kIsGreekish,
kIsNumber,
kIsArabic,
};
CharacterType varType;
int8_t multiplier;
if (aMathVar <= NS_MATHML_MATHVARIANT_NORMAL) {
// nothing to do here
return aCh;
}
if (aMathVar > NS_MATHML_MATHVARIANT_STRETCHED) {
NS_ASSERTION(false, "Illegal mathvariant value");
return aCh;
}
// Exceptional characters with at most one possible transformation
if (aCh == HOLE_GREEK_UPPER_THETA) {
// Nothing at this code point is transformed
return aCh;
}
if (aCh == GREEK_LETTER_DIGAMMA) {
if (aMathVar == NS_MATHML_MATHVARIANT_BOLD) {
return MATH_BOLD_CAPITAL_DIGAMMA;
}
return aCh;
}
if (aCh == GREEK_SMALL_LETTER_DIGAMMA) {
if (aMathVar == NS_MATHML_MATHVARIANT_BOLD) {
return MATH_BOLD_SMALL_DIGAMMA;
}
return aCh;
}
if (aCh == LATIN_SMALL_LETTER_DOTLESS_I) {
if (aMathVar == NS_MATHML_MATHVARIANT_ITALIC) {
return MATH_ITALIC_SMALL_DOTLESS_I;
}
return aCh;
}
if (aCh == LATIN_SMALL_LETTER_DOTLESS_J) {
if (aMathVar == NS_MATHML_MATHVARIANT_ITALIC) {
return MATH_ITALIC_SMALL_DOTLESS_J;
}
return aCh;
}
// The Unicode mathematical blocks are divided into four segments: Latin,
// Greek, numbers and Arabic. In the case of the first three
// baseChar represents the relative order in which the characters are
// encoded in the Unicode mathematical block, normalised to the first
// character of that sequence.
//
if ('A' <= aCh && aCh <= 'Z') {
baseChar = aCh - 'A';
varType = kIsLatin;
} else if ('a' <= aCh && aCh <= 'z') {
// Lowercase characters are placed immediately after the uppercase
// characters in the Unicode mathematical block. The constant subtraction
// represents the number of characters between the start of the sequence
// (capital A) and the first lowercase letter.
baseChar = MATH_BOLD_SMALL_A-MATH_BOLD_UPPER_A + aCh - 'a';
varType = kIsLatin;
} else if ('0' <= aCh && aCh <= '9') {
baseChar = aCh - '0';
varType = kIsNumber;
} else if (GREEK_UPPER_ALPHA <= aCh && aCh <= GREEK_UPPER_OMEGA) {
baseChar = aCh-GREEK_UPPER_ALPHA;
varType = kIsGreekish;
} else if (GREEK_LOWER_ALPHA <= aCh && aCh <= GREEK_LOWER_OMEGA) {
// Lowercase Greek comes after uppercase Greek.
// Note in this instance the presence of an additional character (Nabla)
// between the end of the uppercase Greek characters and the lowercase
// ones.
baseChar = MATH_BOLD_SMALL_ALPHA - MATH_BOLD_UPPER_ALPHA
+ aCh-GREEK_LOWER_ALPHA;
varType = kIsGreekish;
} else if (0x0600 <= aCh && aCh <= 0x06FF) {
// Arabic characters are defined within this range
varType = kIsArabic;
} else {
switch (aCh) {
case GREEK_UPPER_THETA:
baseChar = MATH_BOLD_UPPER_THETA-MATH_BOLD_UPPER_ALPHA;
break;
case NABLA:
baseChar = MATH_BOLD_NABLA-MATH_BOLD_UPPER_ALPHA;
break;
case PARTIAL_DIFFERENTIAL:
baseChar = MATH_BOLD_PARTIAL_DIFFERENTIAL - MATH_BOLD_UPPER_ALPHA;
break;
case GREEK_LUNATE_EPSILON_SYMBOL:
baseChar = MATH_BOLD_EPSILON_SYMBOL - MATH_BOLD_UPPER_ALPHA;
break;
case GREEK_THETA_SYMBOL:
baseChar = MATH_BOLD_THETA_SYMBOL - MATH_BOLD_UPPER_ALPHA;
break;
case GREEK_KAPPA_SYMBOL:
baseChar = MATH_BOLD_KAPPA_SYMBOL - MATH_BOLD_UPPER_ALPHA;
break;
case GREEK_PHI_SYMBOL:
baseChar = MATH_BOLD_PHI_SYMBOL - MATH_BOLD_UPPER_ALPHA;
break;
case GREEK_RHO_SYMBOL:
baseChar = MATH_BOLD_RHO_SYMBOL - MATH_BOLD_UPPER_ALPHA;
break;
case GREEK_PI_SYMBOL:
baseChar = MATH_BOLD_PI_SYMBOL - MATH_BOLD_UPPER_ALPHA;
break;
default:
return aCh;
}
varType = kIsGreekish;
}
if (varType == kIsNumber) {
switch (aMathVar) {
// Each possible number mathvariant is encoded in a single, contiguous
// block. For example the beginning of the double struck number range
// follows immediately after the end of the bold number range.
// multiplier represents the order of the sequences relative to the first
// one.
case NS_MATHML_MATHVARIANT_BOLD:
multiplier = 0;
break;
case NS_MATHML_MATHVARIANT_DOUBLE_STRUCK:
multiplier = 1;
break;
case NS_MATHML_MATHVARIANT_SANS_SERIF:
multiplier = 2;
break;
case NS_MATHML_MATHVARIANT_BOLD_SANS_SERIF:
multiplier = 3;
break;
case NS_MATHML_MATHVARIANT_MONOSPACE:
multiplier = 4;
break;
default:
// This mathvariant isn't defined for numbers or is otherwise normal
return aCh;
}
// As the ranges are contiguous, to find the desired mathvariant range it
// is sufficient to multiply the position within the sequence order
// (multiplier) with the period of the sequence (which is constant for all
// number sequences) and to add the character point of the first character
// within the number mathvariant range.
// To this the baseChar calculated earlier is added to obtain the final
// code point.
return baseChar+multiplier*(MATH_DOUBLE_STRUCK_ZERO-MATH_BOLD_DIGIT_ZERO)
+MATH_BOLD_DIGIT_ZERO;
} else if (varType == kIsGreekish) {
switch (aMathVar) {
case NS_MATHML_MATHVARIANT_BOLD:
multiplier = 0;
break;
case NS_MATHML_MATHVARIANT_ITALIC:
multiplier = 1;
break;
case NS_MATHML_MATHVARIANT_BOLD_ITALIC:
multiplier = 2;
break;
case NS_MATHML_MATHVARIANT_BOLD_SANS_SERIF:
multiplier = 3;
break;
case NS_MATHML_MATHVARIANT_SANS_SERIF_BOLD_ITALIC:
multiplier = 4;
break;
default:
// This mathvariant isn't defined for Greek or is otherwise normal
return aCh;
}
// See the kIsNumber case for an explanation of the following calculation
return baseChar + MATH_BOLD_UPPER_ALPHA +
multiplier*(MATH_ITALIC_UPPER_ALPHA - MATH_BOLD_UPPER_ALPHA);
}
uint32_t tempChar;
uint32_t newChar;
if (varType == kIsArabic) {
const MathVarMapping* mapTable;
uint32_t tableLength;
switch (aMathVar) {
/* The Arabic mathematical block is not continuous, nor does it have a
* monotonic mapping to the unencoded characters, requiring the use of a
* lookup table.
*/
case NS_MATHML_MATHVARIANT_INITIAL:
mapTable = gArabicInitialMapTable;
tableLength = ArrayLength(gArabicInitialMapTable);
break;
case NS_MATHML_MATHVARIANT_TAILED:
mapTable = gArabicTailedMapTable;
tableLength = ArrayLength(gArabicTailedMapTable);
break;
case NS_MATHML_MATHVARIANT_STRETCHED:
mapTable = gArabicStretchedMapTable;
tableLength = ArrayLength(gArabicStretchedMapTable);
break;
case NS_MATHML_MATHVARIANT_LOOPED:
mapTable = gArabicLoopedMapTable;
tableLength = ArrayLength(gArabicLoopedMapTable);
break;
case NS_MATHML_MATHVARIANT_DOUBLE_STRUCK:
mapTable = gArabicDoubleMapTable;
tableLength = ArrayLength(gArabicDoubleMapTable);
break;
default:
// No valid transformations exist
return aCh;
}
newChar = MathvarMappingSearch(aCh, mapTable, tableLength);
} else {
// Must be Latin
if (aMathVar > NS_MATHML_MATHVARIANT_MONOSPACE) {
// Latin doesn't support the Arabic mathvariants
return aCh;
}
multiplier = aMathVar - 2;
// This is possible because the values for NS_MATHML_MATHVARIANT_* are
// chosen to coincide with the order in which the encoded mathvariant
// characters are located within their unicode block (less an offset to
// avoid _NONE and _NORMAL variants)
// See the kIsNumber case for an explanation of the following calculation
tempChar = baseChar + MATH_BOLD_UPPER_A +
multiplier*(MATH_ITALIC_UPPER_A - MATH_BOLD_UPPER_A);
// There are roughly twenty characters that are located outside of the
// mathematical block, so the spaces where they ought to be are used
// as keys for a lookup table containing the correct character mappings.
newChar = MathvarMappingSearch(tempChar, gLatinExceptionMapTable,
ArrayLength(gLatinExceptionMapTable));
}
if (newChar) {
return newChar;
} else if (varType == kIsLatin) {
return tempChar;
} else {
// An Arabic character without a corresponding mapping
return aCh;
}
}
void
nsMathVariantTextRunFactory::RebuildTextRun(nsTransformedTextRun* aTextRun,
gfxContext* aRefContext)
{
gfxFontGroup* fontGroup = aTextRun->GetFontGroup();
gfxFontStyle fontStyle = *fontGroup->GetStyle();
nsAutoString convertedString;
nsAutoTArray<bool,50> charsToMergeArray;
nsAutoTArray<bool,50> deletedCharsArray;
nsAutoTArray<nsStyleContext*,50> styleArray;
nsAutoTArray<uint8_t,50> canBreakBeforeArray;
bool mergeNeeded = false;
bool singleCharMI =
aTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_SINGLE_CHAR_MI;
uint32_t length = aTextRun->GetLength();
const char16_t* str = aTextRun->mString.BeginReading();
nsRefPtr<nsStyleContext>* styles = aTextRun->mStyles.Elements();
uint8_t mathVar;
bool doMathvariantStyling = true;
for (uint32_t i = 0; i < length; ++i) {
int extraChars = 0;
nsStyleContext* styleContext = styles[i];
mathVar = styleContext->StyleFont()->mMathVariant;
if (singleCharMI && mathVar == NS_MATHML_MATHVARIANT_NONE) {
mathVar = NS_MATHML_MATHVARIANT_ITALIC;
}
uint32_t ch = str[i];
if (NS_IS_HIGH_SURROGATE(ch) && i < length - 1 &&
NS_IS_LOW_SURROGATE(str[i + 1])) {
ch = SURROGATE_TO_UCS4(ch, str[i + 1]);
}
uint32_t ch2 = MathVariant(ch, mathVar);
if (mathVar == NS_MATHML_MATHVARIANT_BOLD ||
mathVar == NS_MATHML_MATHVARIANT_BOLD_ITALIC ||
mathVar == NS_MATHML_MATHVARIANT_ITALIC) {
if (ch == ch2 && ch != 0x20 && ch != 0xA0) {
// Don't perform the transformation if a character cannot be
// transformed. There is an exception for whitespace as it is both
// common and innocuous.
doMathvariantStyling = false;
}
// Undo the change as it will be handled as a font styling.
ch2 = ch;
}
deletedCharsArray.AppendElement(false);
charsToMergeArray.AppendElement(false);
styleArray.AppendElement(styleContext);
canBreakBeforeArray.AppendElement(aTextRun->CanBreakLineBefore(i));
if (IS_IN_BMP(ch2)) {
convertedString.Append(ch2);
} else {
convertedString.Append(H_SURROGATE(ch2));
convertedString.Append(L_SURROGATE(ch2));
++extraChars;
if (!IS_IN_BMP(ch)) {
deletedCharsArray.AppendElement(true); // not exactly deleted, but
// the trailing surrogate is skipped
++i;
}
}
while (extraChars-- > 0) {
mergeNeeded = true;
charsToMergeArray.AppendElement(true);
styleArray.AppendElement(styleContext);
canBreakBeforeArray.AppendElement(false);
}
}
uint32_t flags;
gfxTextRunFactory::Parameters innerParams =
GetParametersForInner(aTextRun, &flags, aRefContext);
nsAutoPtr<nsTransformedTextRun> transformedChild;
nsAutoPtr<gfxTextRun> cachedChild;
gfxTextRun* child;
if (mathVar == NS_MATHML_MATHVARIANT_BOLD && doMathvariantStyling) {
fontStyle.style = NS_FONT_STYLE_NORMAL;
fontStyle.weight = NS_FONT_WEIGHT_BOLD;
} else if (mathVar == NS_MATHML_MATHVARIANT_ITALIC && doMathvariantStyling) {
fontStyle.style = NS_FONT_STYLE_ITALIC;
fontStyle.weight = NS_FONT_WEIGHT_NORMAL;
} else if (mathVar == NS_MATHML_MATHVARIANT_BOLD_ITALIC &&
doMathvariantStyling) {
fontStyle.style = NS_FONT_STYLE_ITALIC;
fontStyle.weight = NS_FONT_WEIGHT_BOLD;
} else {
// Mathvariant overrides fontstyle and fontweight
fontStyle.style = NS_FONT_STYLE_NORMAL;
fontStyle.weight = NS_FONT_WEIGHT_NORMAL;
}
nsRefPtr<gfxFontGroup> newFontGroup = fontGroup->Copy(&fontStyle);
if (!newFontGroup)
return;
if (mInnerTransformingTextRunFactory) {
transformedChild = mInnerTransformingTextRunFactory->MakeTextRun(
convertedString.BeginReading(), convertedString.Length(),
&innerParams, newFontGroup, flags, styleArray.Elements(), false);
child = transformedChild.get();
} else {
cachedChild = newFontGroup->MakeTextRun(
convertedString.BeginReading(), convertedString.Length(),
&innerParams, flags);
child = cachedChild.get();
}
if (!child)
return;
// Copy potential linebreaks into child so they're preserved
// (and also child will be shaped appropriately)
NS_ASSERTION(convertedString.Length() == canBreakBeforeArray.Length(),
"Dropped characters or break-before values somewhere!");
child->SetPotentialLineBreaks(0, canBreakBeforeArray.Length(),
canBreakBeforeArray.Elements(), aRefContext);
if (transformedChild) {
transformedChild->FinishSettingProperties(aRefContext);
}
if (mergeNeeded) {
// Now merge multiple characters into one multi-glyph character as required
NS_ASSERTION(charsToMergeArray.Length() == child->GetLength(),
"source length mismatch");
NS_ASSERTION(deletedCharsArray.Length() == aTextRun->GetLength(),
"destination length mismatch");
MergeCharactersInTextRun(aTextRun, child, charsToMergeArray.Elements(),
deletedCharsArray.Elements());
} else {
// No merging to do, so just copy; this produces a more optimized textrun.
// We can't steal the data because the child may be cached and stealing
// the data would break the cache.
aTextRun->ResetGlyphRuns();
aTextRun->CopyGlyphDataFrom(child, 0, child->GetLength(), 0);
}
}
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