1 files changed, 107 insertions, 0 deletions
diff --git a/Source/WebCore/platform/text/TextBoundaries.cpp b/Source/WebCore/platform/text/TextBoundaries.cpp
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+++ b/Source/WebCore/platform/text/TextBoundaries.cpp
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+/*
+ * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
+ * Copyright (C) 2009 Dominik Röttsches <dominik.roettsches@access-company.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "TextBoundaries.h"
+
+#include "TextBreakIterator.h"
+#include <wtf/text/StringImpl.h>
+#include <wtf/unicode/Unicode.h>
+
+using namespace WTF;
+using namespace Unicode;
+
+namespace WebCore {
+
+int endOfFirstWordBoundaryContext(const UChar* characters, int length)
+{
+    for (int i = 0; i < length; ) {
+        int first = i;
+        UChar32 ch;
+        U16_NEXT(characters, i, length, ch);
+        if (!requiresContextForWordBoundary(ch))
+            return first;
+    }
+    return length;
+}
+
+int startOfLastWordBoundaryContext(const UChar* characters, int length)
+{
+    for (int i = length; i > 0; ) {
+        int last = i;
+        UChar32 ch;
+        U16_PREV(characters, 0, i, ch);
+        if (!requiresContextForWordBoundary(ch))
+            return last;
+    }
+    return 0;
+}
+
+#if !PLATFORM(BREWMP) && !PLATFORM(MAC) && !PLATFORM(QT)
+
+int findNextWordFromIndex(const UChar* chars, int len, int position, bool forward)
+{
+    TextBreakIterator* it = wordBreakIterator(chars, len);
+
+    if (forward) {
+        position = textBreakFollowing(it, position);
+        while (position != TextBreakDone) {
+            // We stop searching when the character preceeding the break
+            // is alphanumeric.
+            if (position < len && isAlphanumeric(chars[position - 1]))
+                return position;
+
+            position = textBreakFollowing(it, position);
+        }
+
+        return len;
+    } else {
+        position = textBreakPreceding(it, position);
+        while (position != TextBreakDone) {
+            // We stop searching when the character following the break
+            // is alphanumeric.
+            if (position > 0 && isAlphanumeric(chars[position]))
+                return position;
+
+            position = textBreakPreceding(it, position);
+        }
+
+        return 0;
+    }
+}
+
+void findWordBoundary(const UChar* chars, int len, int position, int* start, int* end)
+{
+    TextBreakIterator* it = wordBreakIterator(chars, len);
+    *end = textBreakFollowing(it, position);
+    if (*end < 0)
+        *end = textBreakLast(it);
+    *start = textBreakPrevious(it);
+}
+
+#endif // !PLATFORM(BREWMP) && !PLATFORM(MAC) && !PLATFORM(QT)
+
+} // namespace WebCore