1 | /* |
2 | * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
3 | * Copyright (C) 2010 Google Inc. All Rights Reserved. |
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 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
14 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
15 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
17 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
18 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
19 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
20 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
21 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
22 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
24 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
25 | */ |
26 | |
27 | #pragma once |
28 | |
29 | #include "CSSPreloadScanner.h" |
30 | #include "HTMLTokenizer.h" |
31 | #include "SegmentedString.h" |
32 | |
33 | namespace WebCore { |
34 | |
35 | class TokenPreloadScanner { |
36 | WTF_MAKE_NONCOPYABLE(TokenPreloadScanner); |
37 | public: |
38 | explicit TokenPreloadScanner(const URL& documentURL, float deviceScaleFactor = 1.0); |
39 | |
40 | void scan(const HTMLToken&, PreloadRequestStream&, Document&); |
41 | |
42 | void setPredictedBaseElementURL(const URL& url) { m_predictedBaseElementURL = url; } |
43 | |
44 | bool inPicture() { return !m_pictureSourceState.isEmpty(); } |
45 | |
46 | private: |
47 | enum class TagId { |
48 | // These tags are scanned by the StartTagScanner. |
49 | Img, |
50 | Input, |
51 | Link, |
52 | Script, |
53 | Meta, |
54 | Source, |
55 | |
56 | // These tags are not scanned by the StartTagScanner. |
57 | Unknown, |
58 | Style, |
59 | Base, |
60 | Template, |
61 | Picture |
62 | }; |
63 | |
64 | class StartTagScanner; |
65 | |
66 | static TagId tagIdFor(const HTMLToken::DataVector&); |
67 | |
68 | static String initiatorFor(TagId); |
69 | |
70 | void updatePredictedBaseURL(const HTMLToken&); |
71 | |
72 | CSSPreloadScanner m_cssScanner; |
73 | const URL m_documentURL; |
74 | const float m_deviceScaleFactor { 1 }; |
75 | |
76 | URL m_predictedBaseElementURL; |
77 | bool m_inStyle { false }; |
78 | |
79 | Vector<bool> m_pictureSourceState; |
80 | |
81 | unsigned m_templateCount { 0 }; |
82 | }; |
83 | |
84 | class HTMLPreloadScanner { |
85 | WTF_MAKE_FAST_ALLOCATED; |
86 | public: |
87 | HTMLPreloadScanner(const HTMLParserOptions&, const URL& documentURL, float deviceScaleFactor = 1.0); |
88 | |
89 | void appendToEnd(const SegmentedString&); |
90 | void scan(HTMLResourcePreloader&, Document&); |
91 | |
92 | private: |
93 | TokenPreloadScanner m_scanner; |
94 | SegmentedString m_source; |
95 | HTMLTokenizer m_tokenizer; |
96 | }; |
97 | |
98 | WEBCORE_EXPORT bool testPreloadScannerViewportSupport(Document*); |
99 | |
100 | } // namespace WebCore |
101 | |