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| 1 /* | |
| 2 * Copyright 2012 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #ifndef SkDataSet_DEFINED | |
| 9 #define SkDataSet_DEFINED | |
| 10 | |
| 11 #include "SkData.h" | |
| 12 #include "SkFlattenable.h" | |
| 13 | |
| 14 class SkStream; | |
| 15 class SkWStream; | |
| 16 | |
| 17 class SkDataSet : public SkFlattenable { | |
| 18 public: | |
| 19 /** | |
| 20 * Returns a new empty dataset. Note: since SkDataSet is immutable, this | |
| 21 * "new" set may be the same one that was returned before, but each | |
| 22 * returned object must have its reference-count balanced regardless. | |
| 23 * | |
| 24 * SkDataSet* empty = SkDataSet::NewEmpty(); | |
| 25 * ... | |
| 26 * empty->unref(); | |
| 27 */ | |
| 28 static SkDataSet* NewEmpty(); | |
| 29 | |
| 30 struct Pair { | |
| 31 const char* fKey; | |
| 32 SkData* fValue; | |
| 33 }; | |
| 34 | |
| 35 SkDataSet(const char key[], SkData* value); | |
| 36 SkDataSet(const Pair[], int count); | |
| 37 virtual ~SkDataSet(); | |
| 38 | |
| 39 bool isEmpty() const { return 0 == fCount; } | |
| 40 int count() const { return fCount; } | |
| 41 SkData* find(const char name[]) const; | |
| 42 | |
| 43 class Iter { | |
| 44 public: | |
| 45 Iter(const SkDataSet& ds) { | |
| 46 fPair = ds.fPairs; | |
| 47 fStop = ds.fPairs + ds.fCount; | |
| 48 } | |
| 49 | |
| 50 const char* key() const { | |
| 51 SkASSERT(!this->done()); | |
| 52 return fPair->fKey; | |
| 53 } | |
| 54 | |
| 55 SkData* value() const { | |
| 56 SkASSERT(!this->done()); | |
| 57 return fPair->fValue; | |
| 58 } | |
| 59 | |
| 60 bool done() const { return fPair >= fStop; } | |
| 61 void next() { | |
| 62 SkASSERT(!this->done()); | |
| 63 fPair += 1; | |
| 64 } | |
| 65 | |
| 66 private: | |
| 67 const SkDataSet::Pair* fPair; | |
| 68 const SkDataSet::Pair* fStop; | |
| 69 }; | |
| 70 | |
| 71 explicit SkDataSet(SkStream*); | |
| 72 void writeToStream(SkWStream*) const; | |
| 73 | |
| 74 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDataSet) | |
| 75 | |
| 76 protected: | |
| 77 SkDataSet(SkFlattenableReadBuffer&); | |
| 78 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; | |
| 79 | |
| 80 private: | |
| 81 int32_t fCount; | |
| 82 uint32_t fKeySize; | |
| 83 Pair* fPairs; | |
| 84 | |
| 85 typedef SkFlattenable INHERITED; | |
| 86 }; | |
| 87 | |
| 88 #endif | |
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Chromium Code Reviews
Issue 27208002:
remove SkDataSet, and just store a key/value in SkAnnotation (Closed)
Base URL: https://skia.googlecode.com/svn/trunk