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Side by Side Diff: components/autofill/browser/autofill_xml_parser.h

Issue 17392006: In components/autofill, move browser/ to core/browser/ (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Rebase to fix conflicts Created 7 years, 6 months ago
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1 // Copyright (c) 2012 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 COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_XML_PARSER_H_
6 #define COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_XML_PARSER_H_
7
8 #include <string>
9 #include <vector>
10
11 #include "base/basictypes.h"
12 #include "base/compiler_specific.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "components/autofill/browser/autofill_server_field_info.h"
15 #include "components/autofill/browser/field_types.h"
16 #include "components/autofill/browser/form_structure.h"
17 #include "third_party/libjingle/source/talk/xmllite/xmlparser.h"
18
19 namespace autofill {
20
21 struct AutocheckoutPageMetaData;
22
23 // The base class that contains common functionality between
24 // AutofillQueryXmlParser and AutofillUploadXmlParser.
25 class AutofillXmlParser : public buzz::XmlParseHandler {
26 public:
27 AutofillXmlParser();
28 virtual ~AutofillXmlParser();
29
30 // Returns true if no parsing errors were encountered.
31 bool succeeded() const { return succeeded_; }
32
33 private:
34 // A callback for the end of an </element>, called by Expat.
35 // |context| is a parsing context used to resolve element/attribute names.
36 // |name| is the name of the element.
37 virtual void EndElement(buzz::XmlParseContext* context,
38 const char* name) OVERRIDE;
39
40 // The callback for character data between tags (<element>text...</element>).
41 // |context| is a parsing context used to resolve element/attribute names.
42 // |text| is a pointer to the beginning of character data (not null
43 // terminated).
44 // |len| is the length of the string pointed to by text.
45 virtual void CharacterData(buzz::XmlParseContext* context,
46 const char* text,
47 int len) OVERRIDE;
48
49 // The callback for parsing errors.
50 // |context| is a parsing context used to resolve names.
51 // |error_code| is a code representing the parsing error.
52 virtual void Error(buzz::XmlParseContext* context,
53 XML_Error error_code) OVERRIDE;
54
55 // True if parsing succeeded.
56 bool succeeded_;
57
58 DISALLOW_COPY_AND_ASSIGN(AutofillXmlParser);
59 };
60
61 // The XML parse handler for parsing Autofill query responses. A typical
62 // response looks like:
63 //
64 // <autofillqueryresponse experimentid="1">
65 // <field autofilltype="0" />
66 // <field autofilltype="1" />
67 // <field autofilltype="3" />
68 // <field autofilltype="2" />
69 // </autofillqueryresponse>
70 //
71 // Fields are returned in the same order they were sent to the server.
72 // autofilltype: The server's guess at what type of field this is. 0
73 // is unknown, other types are documented in
74 // components/autofill/browser/field_types.h.
75 class AutofillQueryXmlParser : public AutofillXmlParser {
76 public:
77 AutofillQueryXmlParser(std::vector<AutofillServerFieldInfo>* field_infos,
78 UploadRequired* upload_required,
79 std::string* experiment_id,
80 AutocheckoutPageMetaData* page_meta_data);
81 virtual ~AutofillQueryXmlParser();
82
83 private:
84 // A callback for the beginning of a new <element>, called by Expat.
85 // |context| is a parsing context used to resolve element/attribute names.
86 // |name| is the name of the element.
87 // |attrs| is the list of attributes (names and values) for the element.
88 virtual void StartElement(buzz::XmlParseContext* context,
89 const char* name,
90 const char** attrs) OVERRIDE;
91
92 // A helper function to parse a |WebElementDescriptor|.
93 // |context| is the current parsing context.
94 // |attrs| is the list of attributes (names and values) for the element.
95 // |element_descriptor| will be populated by this function.
96 void ParseElementDescriptor(buzz::XmlParseContext* context,
97 const char* const* attrs,
98 WebElementDescriptor* element_descriptor);
99
100 // A helper function to retrieve integer values from strings. Raises an
101 // XML parse error if it fails.
102 // |context| is the current parsing context.
103 // |value| is the string to convert.
104 int GetIntValue(buzz::XmlParseContext* context, const char* attribute);
105
106 // The parsed <field type, default value> pairs.
107 std::vector<AutofillServerFieldInfo>* field_infos_;
108
109 // A flag indicating whether the client should upload Autofill data when this
110 // form is submitted.
111 UploadRequired* upload_required_;
112
113 // The server experiment to which this query response belongs.
114 // For the default server implementation, this is empty.
115 std::string* experiment_id_;
116
117 // Page metadata for multipage autofill flow.
118 AutocheckoutPageMetaData* page_meta_data_;
119
120 // The click element the parser is currently processing.
121 WebElementDescriptor* current_click_element_;
122
123 DISALLOW_COPY_AND_ASSIGN(AutofillQueryXmlParser);
124 };
125
126 // The XML parser for handling Autofill upload responses. Typical upload
127 // responses look like:
128 //
129 // <autofilluploadresponse negativeuploadrate="0.00125" positiveuploadrate="1"/>
130 //
131 // The positive upload rate is the percentage of uploads to send to the server
132 // when something in the users profile matches what they have entered in a form.
133 // The negative upload rate is the percentage of uploads to send when nothing in
134 // the form matches what's in the users profile.
135 // The negative upload rate is typically much lower than the positive upload
136 // rate.
137 class AutofillUploadXmlParser : public AutofillXmlParser {
138 public:
139 AutofillUploadXmlParser(double* positive_upload_rate,
140 double* negative_upload_rate);
141
142 private:
143 // A callback for the beginning of a new <element>, called by Expat.
144 // |context| is a parsing context used to resolve element/attribute names.
145 // |name| is the name of the element.
146 // |attrs| is the list of attributes (names and values) for the element.
147 virtual void StartElement(buzz::XmlParseContext* context,
148 const char* name,
149 const char** attrs) OVERRIDE;
150
151 // A helper function to retrieve double values from strings. Raises an XML
152 // parse error if it fails.
153 // |context| is the current parsing context.
154 // |value| is the string to convert.
155 double GetDoubleValue(buzz::XmlParseContext* context, const char* attribute);
156
157 // True if parsing succeeded.
158 bool succeeded_;
159
160 double* positive_upload_rate_;
161 double* negative_upload_rate_;
162
163 DISALLOW_COPY_AND_ASSIGN(AutofillUploadXmlParser);
164 };
165
166 } // namespace autofill
167
168 #endif // COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_XML_PARSER_H_
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