1/*
2 * Copyright (C) 2015 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 AAPT_SOURCE_XML_PULL_PARSER_H
18#define AAPT_SOURCE_XML_PULL_PARSER_H
19
20#include "XmlPullParser.h"
21
22#include <istream>
23#include <libexpat/expat.h>
24#include <queue>
25#include <stack>
26#include <string>
27#include <vector>
28
29namespace aapt {
30
31class SourceXmlPullParser : public XmlPullParser {
32public:
33    SourceXmlPullParser(std::istream& in);
34    SourceXmlPullParser(const SourceXmlPullParser& rhs) = delete;
35    ~SourceXmlPullParser();
36
37    Event getEvent() const override;
38    const std::string& getLastError() const override ;
39    Event next() override ;
40
41    const std::u16string& getComment() const override;
42    size_t getLineNumber() const override;
43    size_t getDepth() const override;
44
45    const std::u16string& getText() const override;
46
47    const std::u16string& getNamespacePrefix() const override;
48    const std::u16string& getNamespaceUri() const override;
49    bool applyPackageAlias(std::u16string* package,
50                           const std::u16string& defaultPackage) const override;
51
52
53    const std::u16string& getElementNamespace() const override;
54    const std::u16string& getElementName() const override;
55
56    const_iterator beginAttributes() const override;
57    const_iterator endAttributes() const override;
58    size_t getAttributeCount() const override;
59
60private:
61    static void XMLCALL startNamespaceHandler(void* userData, const char* prefix, const char* uri);
62    static void XMLCALL startElementHandler(void* userData, const char* name, const char** attrs);
63    static void XMLCALL characterDataHandler(void* userData, const char* s, int len);
64    static void XMLCALL endElementHandler(void* userData, const char* name);
65    static void XMLCALL endNamespaceHandler(void* userData, const char* prefix);
66    static void XMLCALL commentDataHandler(void* userData, const char* comment);
67
68    struct EventData {
69        Event event;
70        size_t lineNumber;
71        size_t depth;
72        std::u16string data1;
73        std::u16string data2;
74        std::u16string comment;
75        std::vector<Attribute> attributes;
76    };
77
78    std::istream& mIn;
79    XML_Parser mParser;
80    char mBuffer[16384];
81    std::queue<EventData> mEventQueue;
82    std::string mLastError;
83    const std::u16string mEmpty;
84    size_t mDepth;
85    std::stack<std::u16string> mNamespaceUris;
86    std::vector<std::pair<std::u16string, std::u16string>> mPackageAliases;
87};
88
89} // namespace aapt
90
91#endif // AAPT_SOURCE_XML_PULL_PARSER_H
92