1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "platform/text/BidiTextRun.h"
33
34#include "platform/text/BidiResolver.h"
35#include "platform/text/TextRunIterator.h"
36
37namespace blink {
38
39TextDirection directionForRun(TextRun& run, bool& hasStrongDirectionality)
40{
41    BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver;
42    bidiResolver.setStatus(BidiStatus(run.direction(), run.directionalOverride()));
43    bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&run, 0));
44    return bidiResolver.determineParagraphDirectionality(&hasStrongDirectionality);
45}
46
47TextDirection determineDirectionality(const String& value, bool& hasStrongDirectionality)
48{
49    TextRun run(value);
50    return directionForRun(run, hasStrongDirectionality);
51}
52
53TextRun textRunWithDirectionality(const String& value, bool& hasStrongDirectionality)
54{
55    TextRun run(value);
56    TextDirection direction = directionForRun(run, hasStrongDirectionality);
57    if (hasStrongDirectionality)
58        run.setDirection(direction);
59    return run;
60}
61
62} // namespace blink
63
64