1/*
2 * Copyright (C) 2007, 2010 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "CSSFontFaceSrcValue.h"
28#include "CachedFont.h"
29#include "CachedResourceLoader.h"
30#include "CachedResourceRequest.h"
31#include "CachedResourceRequestInitiators.h"
32#include "Document.h"
33#include "FontCustomPlatformData.h"
34#include "Node.h"
35#include "SVGFontFaceElement.h"
36#include "StyleSheetContents.h"
37#include <wtf/text/StringBuilder.h>
38
39namespace WebCore {
40
41#if ENABLE(SVG_FONTS)
42bool CSSFontFaceSrcValue::isSVGFontFaceSrc() const
43{
44    return equalIgnoringCase(m_format, "svg");
45}
46#endif
47
48bool CSSFontFaceSrcValue::isSupportedFormat() const
49{
50    // Normally we would just check the format, but in order to avoid conflicts with the old WinIE style of font-face,
51    // we will also check to see if the URL ends with .eot.  If so, we'll go ahead and assume that we shouldn't load it.
52    if (m_format.isEmpty()) {
53        // Check for .eot.
54        if (!m_resource.startsWith("data:", false) && m_resource.endsWith(".eot", false))
55            return false;
56        return true;
57    }
58
59    return FontCustomPlatformData::supportsFormat(m_format)
60#if ENABLE(SVG_FONTS)
61           || isSVGFontFaceSrc()
62#endif
63           ;
64}
65
66String CSSFontFaceSrcValue::customCssText() const
67{
68    StringBuilder result;
69    if (isLocal())
70        result.appendLiteral("local(");
71    else
72        result.appendLiteral("url(");
73    result.append(m_resource);
74    result.append(')');
75    if (!m_format.isEmpty()) {
76        result.appendLiteral(" format(");
77        result.append(m_format);
78        result.append(')');
79    }
80    return result.toString();
81}
82
83void CSSFontFaceSrcValue::addSubresourceStyleURLs(ListHashSet<KURL>& urls, const StyleSheetContents* styleSheet) const
84{
85    if (!isLocal())
86        addSubresourceURL(urls, styleSheet->completeURL(m_resource));
87}
88
89bool CSSFontFaceSrcValue::hasFailedOrCanceledSubresources() const
90{
91    if (!m_cachedFont)
92        return false;
93    return m_cachedFont->loadFailedOrCanceled();
94}
95
96CachedFont* CSSFontFaceSrcValue::cachedFont(Document* document)
97{
98    if (!m_cachedFont) {
99        CachedResourceRequest request(ResourceRequest(document->completeURL(m_resource)));
100        request.setInitiator(cachedResourceRequestInitiators().css);
101        m_cachedFont = document->cachedResourceLoader()->requestFont(request);
102    }
103    return m_cachedFont.get();
104}
105
106bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
107{
108    return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;
109}
110
111}
112