nsresult
nsLineBreaker::AppendText(nsIAtom* aLangGroup, const PRUnichar* aText, PRUint32 aLength,
PRUint32 aFlags, nsILineBreakSink* aSink)
{
NS_ASSERTION(aLength > 0, "Appending empty text...");
PRUint32 offset = 0;
// Continue the current word
if (mCurrentWord.Length() > 0) {
NS_ASSERTION(!mAfterBreakableSpace && !mBreakHere, "These should not be set");
while (offset < aLength && !IsSpace(aText[offset])) {
mCurrentWord.AppendElement(aText[offset]);
if (!mCurrentWordContainsComplexChar && IsComplexChar(aText[offset])) {
mCurrentWordContainsComplexChar = PR_TRUE;
}
UpdateCurrentWordLangGroup(aLangGroup);
++offset;
}
if (offset > 0) {
mTextItems.AppendElement(TextItem(aSink, 0, offset, aFlags));
}
if (offset == aLength)
return NS_OK;
// We encountered whitespace, so we're done with this word
nsresult rv = FlushCurrentWord();
if (NS_FAILED(rv))
return rv;
}
nsAutoTArray<PRUint8,4000> breakState;
if (aSink) {
if (!breakState.AppendElements(aLength))
return NS_ERROR_OUT_OF_MEMORY;
}
nsTArray<bool> capitalizationState;
if (aSink && (aFlags & BREAK_NEED_CAPITALIZATION)) {
if (!capitalizationState.AppendElements(aLength))
return NS_ERROR_OUT_OF_MEMORY;
memset(capitalizationState.Elements(), PR_FALSE, aLength);
}
PRUint32 start = offset;
bool noBreaksNeeded = !aSink ||
(aFlags == (BREAK_SUPPRESS_INITIAL | BREAK_SUPPRESS_INSIDE | BREAK_SKIP_SETTING_NO_BREAKS) &&
!mBreakHere && !mAfterBreakableSpace);
if (noBreaksNeeded) {
// Skip to the space before the last word, since either the break data
// here is not needed, or no breaks are set in the sink and there cannot
// be any breaks in this chunk; all we need is the context for the next
// chunk (if any)
offset = aLength;
while (offset > start) {
--offset;
if (IsSpace(aText[offset]))
break;
}
}
PRUint32 wordStart = offset;
bool wordHasComplexChar = false;
nsRefPtr<nsHyphenator> hyphenator;
if ((aFlags & BREAK_USE_AUTO_HYPHENATION) && !(aFlags & BREAK_SUPPRESS_INSIDE)) {
hyphenator = nsHyphenationManager::Instance()->GetHyphenator(aLangGroup);
}
for (;;) {
PRUnichar ch = aText[offset];
bool isSpace = IsSpace(ch);
bool isBreakableSpace = isSpace && !(aFlags & BREAK_SUPPRESS_INSIDE);
if (aSink) {
breakState[offset] =
mBreakHere || (mAfterBreakableSpace && !isBreakableSpace) ?
gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NORMAL :
gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE;
}
mBreakHere = PR_FALSE;
mAfterBreakableSpace = isBreakableSpace;
if (isSpace) {
if (offset > wordStart && aSink) {
if (!(aFlags & BREAK_SUPPRESS_INSIDE)) {
if (wordHasComplexChar) {
// Save current start-of-word state because GetJISx4051Breaks will
// set it to false
PRUint8 currentStart = breakState[wordStart];
nsContentUtils::LineBreaker()->
GetJISx4051Breaks(aText + wordStart, offset - wordStart,
breakState.Elements() + wordStart);
breakState[wordStart] = currentStart;
}
if (hyphenator) {
FindHyphenationPoints(hyphenator,
aText + wordStart, aText + offset,
breakState.Elements() + wordStart);
}
}
if (aFlags & BREAK_NEED_CAPITALIZATION) {
SetupCapitalization(aText + wordStart, offset - wordStart,
capitalizationState.Elements() + wordStart);
}
}
wordHasComplexChar = PR_FALSE;
++offset;
if (offset >= aLength)
break;
wordStart = offset;
} else {
if (!wordHasComplexChar && IsComplexChar(ch)) {
wordHasComplexChar = PR_TRUE;
}
++offset;
if (offset >= aLength) {
// Save this word
mCurrentWordContainsComplexChar = wordHasComplexChar;
PRUint32 len = offset - wordStart;
PRUnichar* elems = mCurrentWord.AppendElements(len);
if (!elems)
return NS_ERROR_OUT_OF_MEMORY;
memcpy(elems, aText + wordStart, sizeof(PRUnichar)*len);
mTextItems.AppendElement(TextItem(aSink, wordStart, len, aFlags));
// Ensure that the break-before for this word is written out
offset = wordStart + 1;
UpdateCurrentWordLangGroup(aLangGroup);
break;
}
}
}
if (!noBreaksNeeded) {
// aSink must not be null
aSink->SetBreaks(start, offset - start, breakState.Elements() + start);
if (aFlags & BREAK_NEED_CAPITALIZATION) {
aSink->SetCapitalization(start, offset - start,
capitalizationState.Elements() + start);
}
}
return NS_OK;
}
nsresult
nsLineBreaker::AppendText(nsIAtom* aHyphenationLanguage, const char16_t* aText, uint32_t aLength,
uint32_t aFlags, nsILineBreakSink* aSink)
{
NS_ASSERTION(aLength > 0, "Appending empty text...");
uint32_t offset = 0;
// Continue the current word
if (mCurrentWord.Length() > 0) {
NS_ASSERTION(!mAfterBreakableSpace && !mBreakHere, "These should not be set");
while (offset < aLength && !IsSpace(aText[offset])) {
mCurrentWord.AppendElement(aText[offset]);
if (!mCurrentWordContainsComplexChar && IsComplexChar(aText[offset])) {
mCurrentWordContainsComplexChar = true;
}
UpdateCurrentWordLanguage(aHyphenationLanguage);
++offset;
}
if (offset > 0) {
mTextItems.AppendElement(TextItem(aSink, 0, offset, aFlags));
}
if (offset == aLength)
return NS_OK;
// We encountered whitespace, so we're done with this word
nsresult rv = FlushCurrentWord();
if (NS_FAILED(rv))
return rv;
}
AutoTArray<uint8_t,4000> breakState;
if (aSink) {
if (!breakState.AppendElements(aLength))
return NS_ERROR_OUT_OF_MEMORY;
}
bool noCapitalizationNeeded = true;
nsTArray<bool> capitalizationState;
if (aSink && (aFlags & BREAK_NEED_CAPITALIZATION)) {
if (!capitalizationState.AppendElements(aLength))
return NS_ERROR_OUT_OF_MEMORY;
memset(capitalizationState.Elements(), false, aLength*sizeof(bool));
noCapitalizationNeeded = false;
}
uint32_t start = offset;
bool noBreaksNeeded = !aSink ||
((aFlags & NO_BREAKS_NEEDED_FLAGS) == NO_BREAKS_NEEDED_FLAGS &&
!mBreakHere && !mAfterBreakableSpace);
if (noBreaksNeeded && noCapitalizationNeeded) {
// Skip to the space before the last word, since either the break data
// here is not needed, or no breaks are set in the sink and there cannot
// be any breaks in this chunk; and we don't need to do word-initial
// capitalization. All we need is the context for the next chunk (if any).
offset = aLength;
while (offset > start) {
--offset;
if (IsSpace(aText[offset]))
break;
}
}
uint32_t wordStart = offset;
bool wordHasComplexChar = false;
RefPtr<nsHyphenator> hyphenator;
if ((aFlags & BREAK_USE_AUTO_HYPHENATION) &&
!(aFlags & BREAK_SUPPRESS_INSIDE) &&
aHyphenationLanguage) {
hyphenator = nsHyphenationManager::Instance()->GetHyphenator(aHyphenationLanguage);
}
for (;;) {
char16_t ch = aText[offset];
bool isSpace = IsSpace(ch);
bool isBreakableSpace = isSpace && !(aFlags & BREAK_SUPPRESS_INSIDE);
if (aSink && !noBreaksNeeded) {
breakState[offset] =
mBreakHere || (mAfterBreakableSpace && !isBreakableSpace) ||
(mWordBreak == nsILineBreaker::kWordBreak_BreakAll) ?
gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NORMAL :
gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE;
}
mBreakHere = false;
mAfterBreakableSpace = isBreakableSpace;
if (isSpace) {
if (offset > wordStart && aSink) {
if (!(aFlags & BREAK_SUPPRESS_INSIDE)) {
if (wordHasComplexChar) {
// Save current start-of-word state because GetJISx4051Breaks will
// set it to false
uint8_t currentStart = breakState[wordStart];
nsContentUtils::LineBreaker()->
GetJISx4051Breaks(aText + wordStart, offset - wordStart,
mWordBreak,
breakState.Elements() + wordStart);
breakState[wordStart] = currentStart;
}
if (hyphenator) {
FindHyphenationPoints(hyphenator,
aText + wordStart, aText + offset,
breakState.Elements() + wordStart);
}
}
if (!noCapitalizationNeeded) {
SetupCapitalization(aText + wordStart, offset - wordStart,
capitalizationState.Elements() + wordStart);
}
}
wordHasComplexChar = false;
++offset;
if (offset >= aLength)
break;
wordStart = offset;
} else {
if (!wordHasComplexChar && IsComplexChar(ch)) {
wordHasComplexChar = true;
}
++offset;
if (offset >= aLength) {
// Save this word
mCurrentWordContainsComplexChar = wordHasComplexChar;
uint32_t len = offset - wordStart;
char16_t* elems = mCurrentWord.AppendElements(len);
if (!elems)
return NS_ERROR_OUT_OF_MEMORY;
memcpy(elems, aText + wordStart, sizeof(char16_t)*len);
mTextItems.AppendElement(TextItem(aSink, wordStart, len, aFlags));
// Ensure that the break-before for this word is written out
offset = wordStart + 1;
UpdateCurrentWordLanguage(aHyphenationLanguage);
break;
}
}
}
if (aSink) {
if (!noBreaksNeeded) {
aSink->SetBreaks(start, offset - start, breakState.Elements() + start);
}
if (!noCapitalizationNeeded) {
aSink->SetCapitalization(start, offset - start,
capitalizationState.Elements() + start);
}
}
return NS_OK;
}
