1/*
2 * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
3 * Copyright (C) 2006 Alexey Proskuryakov
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1.  Redistributions of source code must retain the above copyright
10 *     notice, this list of conditions and the following disclaimer.
11 * 2.  Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15 *     its contributors may be used to endorse or promote products derived
16 *     from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#import "config.h"
31#import "SimpleFontData.h"
32
33#if USE(ATSUI)
34
35#import "Font.h"
36#import "FontCache.h"
37#import "FontDescription.h"
38#import <ApplicationServices/ApplicationServices.h>
39#import <AppKit/AppKit.h>
40#import <wtf/Assertions.h>
41
42using namespace std;
43
44namespace WebCore {
45
46void SimpleFontData::checkShapesArabic() const
47{
48    ASSERT(!m_checkedShapesArabic);
49
50    m_checkedShapesArabic = true;
51
52    ATSUFontID fontID = m_platformData.ctFont() ? CTFontGetPlatformFont(m_platformData.ctFont(), 0) : 0;
53    if (!fontID) {
54        LOG_ERROR("unable to get ATSUFontID for %@", m_platformData.font());
55        return;
56    }
57
58    // This function is called only on fonts that contain Arabic glyphs. Our
59    // heuristic is that if such a font has a glyph metamorphosis table, then
60    // it includes shaping information for Arabic.
61    FourCharCode tables[] = { 'morx', 'mort' };
62    for (size_t i = 0; i < WTF_ARRAY_LENGTH(tables); ++i) {
63        ByteCount tableSize;
64        OSStatus status = ATSFontGetTable(fontID, tables[i], 0, 0, 0, &tableSize);
65        if (status == noErr) {
66            m_shapesArabic = true;
67            return;
68        }
69
70        if (status != kATSInvalidFontTableAccess)
71            LOG_ERROR("ATSFontGetTable failed (%d)", status);
72    }
73}
74
75} // namespace WebCore
76
77#endif
78