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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CompressibleString_h | |
6 #define CompressibleString_h | |
7 | |
8 #include "platform/PlatformExport.h" | |
9 #include "wtf/text/Unicode.h" | |
10 #include "wtf/text/WTFString.h" | |
11 | |
12 namespace blink { | |
13 | |
14 // TODO(hajimehoshi): Now these classes are in platform/text to use UMA. Move | |
15 // them to wtf/text. | |
16 | |
17 // This method must be called only by Platform::initialize. | |
18 void initializeCompressibleStringTable(); | |
19 | |
20 class PLATFORM_EXPORT CompressibleStringImpl final : public RefCounted<Compressi bleStringImpl> { | |
21 WTF_MAKE_NONCOPYABLE(CompressibleStringImpl); | |
22 public: | |
23 static void compressAll(); | |
24 static void setPageBackground(bool); | |
25 | |
26 CompressibleStringImpl(); | |
27 CompressibleStringImpl(PassRefPtr<StringImpl>); | |
haraken
2016/01/19 07:43:36
Add explicit.
hajimehoshi
2016/01/19 10:19:21
Done.
| |
28 ~CompressibleStringImpl(); | |
29 | |
30 bool isEmpty() const { return originalLength() == 0; } | |
31 | |
32 bool isCompressed() const { return m_isCompressed; } | |
33 unsigned originalLength() const { return m_string.length(); } | |
34 bool is8Bit() const { return m_string.is8Bit(); } | |
35 | |
36 unsigned originalContentSizeInBytes() const; | |
37 unsigned currentSizeInBytes() const; | |
38 | |
39 const String& toString(); | |
40 const LChar* characters8(); | |
41 const UChar* characters16(); | |
42 | |
43 void compressString(); | |
44 void decompressString(); | |
45 | |
46 private: | |
47 static bool s_isPageBackground; | |
48 | |
49 String m_string; | |
50 bool m_isCompressed; | |
51 }; | |
52 | |
53 class PLATFORM_EXPORT CompressibleString final { | |
54 public: | |
55 CompressibleString(); | |
56 CompressibleString(const CompressibleString&); | |
57 explicit CompressibleString(PassRefPtr<StringImpl>); | |
58 | |
59 bool isNull() const { return !m_impl; } | |
60 bool isEmpty() const { return isNull() || m_impl->isEmpty(); } | |
61 unsigned length() const { return m_impl ? m_impl->originalLength() : 0; } | |
62 | |
63 unsigned currentSizeInBytes() const { return m_impl ? m_impl->currentSizeInB ytes() : 0; } | |
64 | |
65 bool isCompressed() const { return m_impl ? m_impl->isCompressed() : false; } | |
66 bool is8Bit() const { return m_impl ? m_impl->is8Bit() : false; } | |
67 | |
68 const String& toString() const { return m_impl ? m_impl->toString() : emptyS tring(); } | |
69 const LChar* characters8() const { return m_impl ? m_impl->characters8() : n ullptr; } | |
70 const UChar* characters16() const { return m_impl ? m_impl->characters16() : nullptr; } | |
71 | |
72 PassRefPtr<CompressibleStringImpl> impl() const { return m_impl; } | |
haraken
2016/01/19 07:43:35
This is a getter for impl, so it should return Com
hajimehoshi
2016/01/19 10:19:21
Done.
| |
73 | |
74 private: | |
75 void compressString() const; | |
76 void decompressString() const; | |
77 | |
78 mutable RefPtr<CompressibleStringImpl> m_impl; | |
79 }; | |
80 | |
81 } // namespace blink | |
82 | |
83 using blink::CompressibleString; | |
84 using blink::CompressibleStringImpl; | |
85 | |
86 #endif | |
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