Move BiDiLineIterator to base/i18n/ directory.

BUG=23581
TEST=trybots

Review URL: http://codereview.chromium.org/6249007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71884 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 60 insertions, 0 deletions

diff --git a/base/i18n/bidi_line_iterator.cc b/base/i18n/bidi_line_iterator.cc
new file mode 100644
index 0000000..3222a3a
--- /dev/null
+++ b/base/i18n/bidi_line_iterator.cc
@@ -0,0 +1,60 @@
+// Copyright (c) 2011 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 "base/i18n/bidi_line_iterator.h"
+
+#include "base/logging.h"
+
+namespace base {
+namespace i18n {
+
+BiDiLineIterator::BiDiLineIterator() : bidi_(NULL) {
+}
+
+BiDiLineIterator::~BiDiLineIterator() {
+  if (bidi_) {
+    ubidi_close(bidi_);
+    bidi_ = NULL;
+  }
+}
+
+bool BiDiLineIterator::Open(const string16& 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);
+  ubidi_setPara(bidi_, text.data(), static_cast<int>(text.length()),
+                right_to_left ? UBIDI_DEFAULT_RTL : UBIDI_DEFAULT_LTR,
+                NULL, &error);
+  return U_SUCCESS(error) ? true : false;
+}
+
+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);
+}
+
+}  // namespace i18n
+}  // namespace base