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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "app/bidi_line_iterator.h"
#include "base/logging.h"
#include "base/string16.h"
#include "base/utf_string_conversions.h"
BiDiLineIterator::~BiDiLineIterator() {
if (bidi_) {
ubidi_close(bidi_);
bidi_ = NULL;
}
}
UBool BiDiLineIterator::Open(const std::wstring& text,
bool right_to_left,
bool url) {
DCHECK(bidi_ == NULL);
UErrorCode error = U_ZERO_ERROR;
bidi_ = ubidi_openSized(static_cast<int>(text.length()), 0, &error);
if (U_FAILURE(error))
return false;
if (right_to_left && url)
ubidi_setReorderingMode(bidi_, UBIDI_REORDER_RUNS_ONLY);
#if defined(WCHAR_T_IS_UTF32)
const string16 text_utf16 = WideToUTF16(text);
#else
const std::wstring &text_utf16 = text;
#endif // U_SIZEOF_WCHAR_T != 4
ubidi_setPara(bidi_, text_utf16.data(), static_cast<int>(text_utf16.length()),
right_to_left ? UBIDI_DEFAULT_RTL : UBIDI_DEFAULT_LTR,
NULL, &error);
return U_SUCCESS(error);
}
int BiDiLineIterator::CountRuns() {
DCHECK(bidi_ != NULL);
UErrorCode error = U_ZERO_ERROR;
const int runs = ubidi_countRuns(bidi_, &error);
return U_SUCCESS(error) ? runs : 0;
}
UBiDiDirection BiDiLineIterator::GetVisualRun(int index,
int* start,
int* length) {
DCHECK(bidi_ != NULL);
return ubidi_getVisualRun(bidi_, index, start, length);
}
void BiDiLineIterator::GetLogicalRun(int start,
int* end,
UBiDiLevel* level) {
DCHECK(bidi_ != NULL);
ubidi_getLogicalRun(bidi_, start, end, level);
}
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