1/*
2 * Copyright (C) 2011 Adobe Systems Incorporated. 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 *
8 * 1. Redistributions of source code must retain the above
9 *    copyright notice, this list of conditions and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 *    copyright notice, this list of conditions and the following
13 *    disclaimer in the documentation and/or other materials
14 *    provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include "config.h"
31
32#if ENABLE(CSS_SHADERS)
33#include "WebKitCSSShaderValue.h"
34
35#include "CSSParser.h"
36#include "CachedResourceLoader.h"
37#include "CachedResourceRequest.h"
38#include "CachedResourceRequestInitiators.h"
39#include "Document.h"
40#include "KURL.h"
41#include "StyleCachedShader.h"
42#include "StylePendingShader.h"
43#include <wtf/text/StringBuilder.h>
44
45namespace WebCore {
46
47WebKitCSSShaderValue::WebKitCSSShaderValue(const String& url)
48    : CSSValue(WebKitCSSShaderClass)
49    , m_url(url)
50    , m_accessedShader(false)
51{
52}
53
54WebKitCSSShaderValue::~WebKitCSSShaderValue()
55{
56}
57
58KURL WebKitCSSShaderValue::completeURL(CachedResourceLoader* loader) const
59{
60    return loader->document()->completeURL(m_url);
61}
62
63StyleCachedShader* WebKitCSSShaderValue::cachedShader(CachedResourceLoader* loader)
64{
65    ASSERT(loader);
66
67    if (!m_accessedShader) {
68        m_accessedShader = true;
69
70        CachedResourceRequest request(ResourceRequest(completeURL(loader)));
71        request.setInitiator(cachedResourceRequestInitiators().css);
72        if (CachedResourceHandle<CachedShader> cachedShader = loader->requestShader(request))
73            m_shader = StyleCachedShader::create(cachedShader.get());
74    }
75
76    return (m_shader && m_shader->isCachedShader()) ? static_cast<StyleCachedShader*>(m_shader.get()) : 0;
77}
78
79StyleShader* WebKitCSSShaderValue::cachedOrPendingShader()
80{
81    if (!m_shader)
82        m_shader = StylePendingShader::create(this);
83
84    return m_shader.get();
85}
86
87String WebKitCSSShaderValue::customCssText() const
88{
89    StringBuilder result;
90    result.appendLiteral("url(");
91    result.append(quoteCSSURLIfNeeded(m_url));
92    result.append(')');
93    if (!m_format.isEmpty()) {
94        result.appendLiteral(" format('");
95        result.append(m_format);
96        result.appendLiteral("')");
97    }
98    return result.toString();
99}
100
101bool WebKitCSSShaderValue::equals(const WebKitCSSShaderValue& other) const
102{
103    return m_url == other.m_url;
104}
105
106} // namespace WebCore
107
108#endif // ENABLE(CSS_SHADERS)
109