61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/i18n/bidi_line_iterator.h"
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#include "base/logging.h"
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namespace base {
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namespace i18n {
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BiDiLineIterator::BiDiLineIterator() : bidi_(NULL) {
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}
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BiDiLineIterator::~BiDiLineIterator() {
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if (bidi_) {
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ubidi_close(bidi_);
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bidi_ = NULL;
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}
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}
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bool BiDiLineIterator::Open(const string16& text,
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bool right_to_left,
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bool url) {
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DCHECK(!bidi_);
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UErrorCode error = U_ZERO_ERROR;
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bidi_ = ubidi_openSized(static_cast<int>(text.length()), 0, &error);
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if (U_FAILURE(error))
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return false;
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if (right_to_left && url)
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ubidi_setReorderingMode(bidi_, UBIDI_REORDER_RUNS_ONLY);
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ubidi_setPara(bidi_, text.data(), static_cast<int>(text.length()),
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right_to_left ? UBIDI_DEFAULT_RTL : UBIDI_DEFAULT_LTR,
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NULL, &error);
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return (U_SUCCESS(error) == TRUE);
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}
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int BiDiLineIterator::CountRuns() {
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DCHECK(bidi_ != NULL);
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UErrorCode error = U_ZERO_ERROR;
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const int runs = ubidi_countRuns(bidi_, &error);
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return U_SUCCESS(error) ? runs : 0;
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}
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UBiDiDirection BiDiLineIterator::GetVisualRun(int index,
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int* start,
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int* length) {
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DCHECK(bidi_ != NULL);
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return ubidi_getVisualRun(bidi_, index, start, length);
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}
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void BiDiLineIterator::GetLogicalRun(int start,
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int* end,
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UBiDiLevel* level) {
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DCHECK(bidi_ != NULL);
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ubidi_getLogicalRun(bidi_, start, end, level);
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}
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} // namespace i18n
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} // namespace base
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