Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 242 insertions, 0 deletions

diff --git a/Source/WebCore/platform/text/TextBreakIteratorICU.cpp b/Source/WebCore/platform/text/TextBreakIteratorICU.cpp
new file mode 100644
index 0000000..f5575ee
--- /dev/null
+++ b/Source/WebCore/platform/text/TextBreakIteratorICU.cpp
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2006 Lars Knoll <lars@trolltech.com>
+ * Copyright (C) 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "TextBreakIterator.h"
+
+#include "PlatformString.h"
+#include "TextBreakIteratorInternalICU.h"
+#include <unicode/ubrk.h>
+#include <wtf/Assertions.h>
+
+namespace WebCore {
+
+static TextBreakIterator* setUpIterator(bool& createdIterator, TextBreakIterator*& iterator,
+    UBreakIteratorType type, const UChar* string, int length)
+{
+    if (!string)
+        return 0;
+
+    if (!createdIterator) {
+        UErrorCode openStatus = U_ZERO_ERROR;
+        iterator = reinterpret_cast<TextBreakIterator*>(ubrk_open(type, currentTextBreakLocaleID(), 0, 0, &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(reinterpret_cast<UBreakIterator*>(iterator), string, length, &setTextStatus);
+    if (U_FAILURE(setTextStatus))
+        return 0;
+
+    return iterator;
+}
+
+TextBreakIterator* characterBreakIterator(const UChar* string, int length)
+{
+    static bool createdCharacterBreakIterator = false;
+    static TextBreakIterator* staticCharacterBreakIterator;
+    return setUpIterator(createdCharacterBreakIterator,
+        staticCharacterBreakIterator, UBRK_CHARACTER, string, length);
+}
+
+TextBreakIterator* wordBreakIterator(const UChar* string, int length)
+{
+    static bool createdWordBreakIterator = false;
+    static TextBreakIterator* staticWordBreakIterator;
+    return setUpIterator(createdWordBreakIterator,
+        staticWordBreakIterator, UBRK_WORD, string, length);
+}
+
+TextBreakIterator* lineBreakIterator(const UChar* string, int length)
+{
+    static bool createdLineBreakIterator = false;
+    static TextBreakIterator* staticLineBreakIterator;
+    return setUpIterator(createdLineBreakIterator,
+        staticLineBreakIterator, UBRK_LINE, string, length);
+}
+
+TextBreakIterator* sentenceBreakIterator(const UChar* string, int length)
+{
+    static bool createdSentenceBreakIterator = false;
+    static TextBreakIterator* staticSentenceBreakIterator;
+    return setUpIterator(createdSentenceBreakIterator,
+        staticSentenceBreakIterator, UBRK_SENTENCE, string, length);
+}
+
+int textBreakFirst(TextBreakIterator* iterator)
+{
+    return ubrk_first(reinterpret_cast<UBreakIterator*>(iterator));
+}
+
+int textBreakLast(TextBreakIterator* iterator)
+{
+    return ubrk_last(reinterpret_cast<UBreakIterator*>(iterator));
+}
+
+int textBreakNext(TextBreakIterator* iterator)
+{
+    return ubrk_next(reinterpret_cast<UBreakIterator*>(iterator));
+}
+
+int textBreakPrevious(TextBreakIterator* iterator)
+{
+    return ubrk_previous(reinterpret_cast<UBreakIterator*>(iterator));
+}
+
+int textBreakPreceding(TextBreakIterator* iterator, int pos)
+{
+    return ubrk_preceding(reinterpret_cast<UBreakIterator*>(iterator), pos);
+}
+
+int textBreakFollowing(TextBreakIterator* iterator, int pos)
+{
+    return ubrk_following(reinterpret_cast<UBreakIterator*>(iterator), pos);
+}
+
+int textBreakCurrent(TextBreakIterator* iterator)
+{
+    return ubrk_current(reinterpret_cast<UBreakIterator*>(iterator));
+}
+
+bool isTextBreak(TextBreakIterator* iterator, int position)
+{
+    return ubrk_isBoundary(reinterpret_cast<UBreakIterator*>(iterator), position);
+}
+
+#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 = reinterpret_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(reinterpret_cast<UBreakIterator*>(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} $VoiceMarks - [\\u0E30 \\u0E32 \\u0E45 \\u0EB0 \\u0EB2]];"
+        "$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
+}
+
+}