reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef SkXMLParser_DEFINED |
| 18 | #define SkXMLParser_DEFINED |
| 19 | |
| 20 | #include "SkMath.h" |
| 21 | #include "SkString.h" |
| 22 | |
| 23 | class SkStream; |
| 24 | |
| 25 | class SkDOM; |
| 26 | struct SkDOMNode; |
| 27 | |
| 28 | class SkXMLParserError { |
| 29 | public: |
| 30 | enum ErrorCode { |
| 31 | kNoError, |
| 32 | kEmptyFile, |
| 33 | kUnknownElement, |
| 34 | kUnknownAttributeName, |
| 35 | kErrorInAttributeValue, |
| 36 | kDuplicateIDs, |
| 37 | kUnknownError |
| 38 | }; |
| 39 | |
| 40 | SkXMLParserError(); |
| 41 | virtual ~SkXMLParserError(); |
| 42 | ErrorCode getErrorCode() const { return fCode; } |
| 43 | virtual void getErrorString(SkString* str) const; |
| 44 | int getLineNumber() const { return fLineNumber; } |
| 45 | int getNativeCode() const { return fNativeCode; } |
| 46 | bool hasError() const { return fCode != kNoError || fNativeCode != -1; } |
| 47 | bool hasNoun() const { return fNoun.size() > 0; } |
| 48 | void reset(); |
| 49 | void setCode(ErrorCode code) { fCode = code; } |
| 50 | void setNoun(const SkString& str) { fNoun.set(str); } |
| 51 | void setNoun(const char* ch) { fNoun.set(ch); } |
| 52 | void setNoun(const char* ch, size_t len) { fNoun.set(ch, len); } |
| 53 | protected: |
| 54 | ErrorCode fCode; |
| 55 | private: |
| 56 | int fLineNumber; |
| 57 | int fNativeCode; |
| 58 | SkString fNoun; |
| 59 | friend class SkXMLParser; |
| 60 | }; |
| 61 | |
| 62 | class SkXMLParser { |
| 63 | public: |
| 64 | SkXMLParser(SkXMLParserError* parserError = NULL); |
| 65 | virtual ~SkXMLParser(); |
| 66 | |
| 67 | /** Returns true for success |
| 68 | */ |
| 69 | bool parse(const char doc[], size_t len); |
| 70 | bool parse(SkStream& docStream); |
| 71 | bool parse(const SkDOM&, const SkDOMNode*); |
| 72 | |
| 73 | static void GetNativeErrorString(int nativeErrorCode, SkString* str); |
| 74 | |
| 75 | protected: |
| 76 | // override in subclasses; return true to stop parsing |
| 77 | virtual bool onStartElement(const char elem[]); |
| 78 | virtual bool onAddAttribute(const char name[], const char value[]); |
| 79 | virtual bool onEndElement(const char elem[]); |
| 80 | virtual bool onText(const char text[], int len); |
| 81 | |
| 82 | public: |
| 83 | // public for ported implementation, not meant for clients to call |
| 84 | virtual bool startElement(const char elem[]); |
| 85 | virtual bool addAttribute(const char name[], const char value[]); |
| 86 | virtual bool endElement(const char elem[]); |
| 87 | virtual bool text(const char text[], int len); |
| 88 | void* fParser; |
| 89 | protected: |
| 90 | SkXMLParserError* fError; |
| 91 | private: |
| 92 | void reportError(void* parser); |
| 93 | }; |
| 94 | |
| 95 | class SkXMLPullParser { |
| 96 | public: |
| 97 | SkXMLPullParser(); |
| 98 | explicit SkXMLPullParser(SkStream*); |
| 99 | virtual ~SkXMLPullParser(); |
| 100 | |
| 101 | SkStream* getStream() const { return fStream; } |
| 102 | SkStream* setStream(SkStream* stream); |
| 103 | |
| 104 | enum EventType { |
| 105 | ERROR = -1, |
| 106 | START_DOCUMENT, |
| 107 | END_DOCUMENT, |
| 108 | START_TAG, |
| 109 | END_TAG, |
| 110 | TEXT, |
| 111 | CDSECT, |
| 112 | ENTITY_REF, |
| 113 | IGNORABLE_WHITESPACE, |
| 114 | PROCESSING_INSTRUCTION, |
| 115 | COMMENT, |
| 116 | DOCDECL |
| 117 | }; |
| 118 | |
| 119 | EventType nextToken(); |
| 120 | EventType getEventType() const { return fCurr.fEventType; } |
| 121 | |
| 122 | struct AttrInfo { |
| 123 | const char* fName; |
| 124 | const char* fValue; |
| 125 | }; |
| 126 | |
| 127 | int getDepth() const { return fDepth; } |
| 128 | const char* getName(); |
| 129 | int getAttributeCount(); |
| 130 | void getAttributeInfo(int, AttrInfo*); |
| 131 | const char* getText(); |
| 132 | bool isWhitespace(); |
| 133 | |
| 134 | protected: |
| 135 | virtual bool onEntityReplacement(const char name[], |
| 136 | SkString* replacement); |
| 137 | |
| 138 | public: |
| 139 | struct Curr { |
| 140 | EventType fEventType; |
| 141 | const char* fName; |
| 142 | AttrInfo* fAttrInfos; |
| 143 | int fAttrInfoCount; |
| 144 | bool fIsWhitespace; |
| 145 | }; |
| 146 | |
| 147 | private: |
| 148 | // implemented in the porting layer |
| 149 | bool onInit(); // return false on failure |
| 150 | EventType onNextToken(); |
| 151 | void onExit(); |
| 152 | |
| 153 | SkStream* fStream; |
| 154 | Curr fCurr; |
| 155 | int fDepth; |
| 156 | |
| 157 | struct Impl; |
| 158 | Impl* fImpl; |
| 159 | }; |
| 160 | |
| 161 | #endif |