diff options
Diffstat (limited to 'WebCore/platform/text/TextBreakIteratorICU.cpp')
| -rw-r--r-- | WebCore/platform/text/TextBreakIteratorICU.cpp | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/WebCore/platform/text/TextBreakIteratorICU.cpp b/WebCore/platform/text/TextBreakIteratorICU.cpp index 9941f58..c4fc1b0 100644 --- a/WebCore/platform/text/TextBreakIteratorICU.cpp +++ b/WebCore/platform/text/TextBreakIteratorICU.cpp @@ -22,6 +22,7 @@ #include "config.h" #include "TextBreakIterator.h" +#include "PlatformString.h" #include "TextBreakIteratorInternalICU.h" #include <unicode/ubrk.h> @@ -114,4 +115,119 @@ bool isTextBreak(TextBreakIterator* bi, int pos) return ubrk_isBoundary(bi, pos); } +#ifndef BUILDING_ON_TIGER +static TextBreakIterator* setUpIteratorWithRules(bool& createdIterator, TextBreakIterator*& iterator, + const char* breakRules, const UChar* string, int length) +{ + if (!string) + return 0; + + if (!createdIterator) { + UParseError parseStatus; + UErrorCode openStatus = U_ZERO_ERROR; + String rules(breakRules); + iterator = static_cast<TextBreakIterator*>(ubrk_openRules(rules.characters(), rules.length(), 0, 0, &parseStatus, &openStatus)); + createdIterator = true; + ASSERT_WITH_MESSAGE(U_SUCCESS(openStatus), "ICU could not open a break iterator: %s (%d)", u_errorName(openStatus), openStatus); + } + if (!iterator) + return 0; + + UErrorCode setTextStatus = U_ZERO_ERROR; + ubrk_setText(iterator, string, length, &setTextStatus); + if (U_FAILURE(setTextStatus)) + return 0; + + return iterator; +} +#endif // BUILDING_ON_TIGER + +TextBreakIterator* cursorMovementIterator(const UChar* string, int length) +{ +#ifdef BUILDING_ON_TIGER + // ICU 3.2 cannot compile the below rules. + return characterBreakIterator(string, length); +#else + // This rule set is based on character-break iterator rules of ICU 4.0 + // <http://source.icu-project.org/repos/icu/icu/tags/release-4-0/source/data/brkitr/char.txt>. + // The major differences from the original ones are listed below: + // * Replaced '[\p{Grapheme_Cluster_Break = SpacingMark}]' with '[\p{General_Category = Spacing Mark} - $Extend]' for ICU 3.8 or earlier; + // * Removed rules that prevent a cursor from moving after prepend characters (Bug 24342); + // * Added rules that prevent a cursor from moving after virama signs of Indic languages except Tamil (Bug 15790), and; + // * Added rules that prevent a cursor from moving before Japanese half-width katakara voiced marks. + static const char* kRules = + "$CR = [\\p{Grapheme_Cluster_Break = CR}];" + "$LF = [\\p{Grapheme_Cluster_Break = LF}];" + "$Control = [\\p{Grapheme_Cluster_Break = Control}];" + "$VoiceMarks = [\\uFF9E\\uFF9F];" // Japanese half-width katakana voiced marks + "$Extend = [\\p{Grapheme_Cluster_Break = Extend} $VoiceMarks];" + "$SpacingMark = [[\\p{General_Category = Spacing Mark}] - $Extend];" + "$L = [\\p{Grapheme_Cluster_Break = L}];" + "$V = [\\p{Grapheme_Cluster_Break = V}];" + "$T = [\\p{Grapheme_Cluster_Break = T}];" + "$LV = [\\p{Grapheme_Cluster_Break = LV}];" + "$LVT = [\\p{Grapheme_Cluster_Break = LVT}];" + "$Hin0 = [\\u0905-\\u0939];" // Devanagari Letter A,...,Ha + "$HinV = \\u094D;" // Devanagari Sign Virama + "$Hin1 = [\\u0915-\\u0939];" // Devanagari Letter Ka,...,Ha + "$Ben0 = [\\u0985-\\u09B9];" // Bengali Letter A,...,Ha + "$BenV = \\u09CD;" // Bengali Sign Virama + "$Ben1 = [\\u0995-\\u09B9];" // Bengali Letter Ka,...,Ha + "$Pan0 = [\\u0A05-\\u0A39];" // Gurmukhi Letter A,...,Ha + "$PanV = \\u0A4D;" // Gurmukhi Sign Virama + "$Pan1 = [\\u0A15-\\u0A39];" // Gurmukhi Letter Ka,...,Ha + "$Guj0 = [\\u0A85-\\u0AB9];" // Gujarati Letter A,...,Ha + "$GujV = \\u0ACD;" // Gujarati Sign Virama + "$Guj1 = [\\u0A95-\\u0AB9];" // Gujarati Letter Ka,...,Ha + "$Ori0 = [\\u0B05-\\u0B39];" // Oriya Letter A,...,Ha + "$OriV = \\u0B4D;" // Oriya Sign Virama + "$Ori1 = [\\u0B15-\\u0B39];" // Oriya Letter Ka,...,Ha + "$Tel0 = [\\u0C05-\\u0C39];" // Telugu Letter A,...,Ha + "$TelV = \\u0C4D;" // Telugu Sign Virama + "$Tel1 = [\\u0C14-\\u0C39];" // Telugu Letter Ka,...,Ha + "$Kan0 = [\\u0C85-\\u0CB9];" // Kannada Letter A,...,Ha + "$KanV = \\u0CCD;" // Kannada Sign Virama + "$Kan1 = [\\u0C95-\\u0CB9];" // Kannada Letter A,...,Ha + "$Mal0 = [\\u0D05-\\u0D39];" // Malayalam Letter A,...,Ha + "$MalV = \\u0D4D;" // Malayalam Sign Virama + "$Mal1 = [\\u0D15-\\u0D39];" // Malayalam Letter A,...,Ha + "!!chain;" + "!!forward;" + "$CR $LF;" + "$L ($L | $V | $LV | $LVT);" + "($LV | $V) ($V | $T);" + "($LVT | $T) $T;" + "[^$Control $CR $LF] $Extend;" + "[^$Control $CR $LF] $SpacingMark;" + "$Hin0 $HinV $Hin1;" // Devanagari Virama (forward) + "$Ben0 $BenV $Ben1;" // Bengali Virama (forward) + "$Pan0 $PanV $Pan1;" // Gurmukhi Virama (forward) + "$Guj0 $GujV $Guj1;" // Gujarati Virama (forward) + "$Ori0 $OriV $Ori1;" // Oriya Virama (forward) + "$Tel0 $TelV $Tel1;" // Telugu Virama (forward) + "$Kan0 $KanV $Kan1;" // Kannada Virama (forward) + "$Mal0 $MalV $Mal1;" // Malayalam Virama (forward) + "!!reverse;" + "$LF $CR;" + "($L | $V | $LV | $LVT) $L;" + "($V | $T) ($LV | $V);" + "$T ($LVT | $T);" + "$Extend [^$Control $CR $LF];" + "$SpacingMark [^$Control $CR $LF];" + "$Hin1 $HinV $Hin0;" // Devanagari Virama (backward) + "$Ben1 $BenV $Ben0;" // Bengali Virama (backward) + "$Pan1 $PanV $Pan0;" // Gurmukhi Virama (backward) + "$Guj1 $GujV $Guj0;" // Gujarati Virama (backward) + "$Ori1 $OriV $Ori0;" // Gujarati Virama (backward) + "$Tel1 $TelV $Tel0;" // Telugu Virama (backward) + "$Kan1 $KanV $Kan0;" // Kannada Virama (backward) + "$Mal1 $MalV $Mal0;" // Malayalam Virama (backward) + "!!safe_reverse;" + "!!safe_forward;"; + static bool createdCursorMovementIterator = false; + static TextBreakIterator* staticCursorMovementIterator; + return setUpIteratorWithRules(createdCursorMovementIterator, staticCursorMovementIterator, kRules, string, length); +#endif // BUILDING_ON_TIGER +} + } |