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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 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 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>
namespace WebCore {
unsigned endOfFirstWordBoundaryContext(StringView text)
{
unsigned length = text.length();
for (unsigned i = 0; i < length; ) {
unsigned first = i;
UChar32 ch;
U16_NEXT(text, i, length, ch);
if (!requiresContextForWordBoundary(ch))
return first;
}
return length;
}
unsigned startOfLastWordBoundaryContext(StringView text)
{
unsigned length = text.length();
for (unsigned i = length; i > 0; ) {
unsigned last = i;
UChar32 ch;
U16_PREV(text, 0, i, ch);
if (!requiresContextForWordBoundary(ch))
return last;
}
return 0;
}
#if !PLATFORM(COCOA)
int findNextWordFromIndex(StringView text, int position, bool forward)
{
TextBreakIterator* it = wordBreakIterator(text);
if (forward) {
position = textBreakFollowing(it, position);
while (position != TextBreakDone) {
// We stop searching when the character preceeding the break is alphanumeric.
if (static_cast<unsigned>(position) < text.length() && u_isalnum(text[position - 1]))
return position;
position = textBreakFollowing(it, position);
}
return text.length();
} else {
position = textBreakPreceding(it, position);
while (position != TextBreakDone) {
// We stop searching when the character following the break is alphanumeric.
if (position && u_isalnum(text[position]))
return position;
position = textBreakPreceding(it, position);
}
return 0;
}
}
void findWordBoundary(StringView text, int position, int* start, int* end)
{
TextBreakIterator* it = wordBreakIterator(text);
*end = textBreakFollowing(it, position);
if (*end < 0)
*end = textBreakLast(it);
*start = textBreakPrevious(it);
}
void findEndWordBoundary(StringView text, int position, int* end)
{
TextBreakIterator* it = wordBreakIterator(text);
*end = textBreakFollowing(it, position);
if (*end < 0)
*end = textBreakLast(it);
}
#endif // !PLATFORM(COCOA)
} // namespace WebCore
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