1 // Copyright 2013 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.
5 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_FORM_STRUCTURE_H_
6 #define COMPONENTS_AUTOFILL_CORE_BROWSER_FORM_STRUCTURE_H_
12 #include "base/callback.h"
13 #include "base/gtest_prod_util.h"
14 #include "base/memory/scoped_ptr.h"
15 #include "base/memory/scoped_vector.h"
16 #include "base/strings/string16.h"
17 #include "components/autofill/core/browser/autofill_field.h"
18 #include "components/autofill/core/browser/autofill_type.h"
19 #include "components/autofill/core/browser/field_types.h"
20 #include "components/autofill/core/common/web_element_descriptor.h"
39 class AutofillMetrics;
42 struct FormDataPredictions;
44 // FormStructure stores a single HTML form together with the values entered
45 // in the fields along with additional information needed by Autofill.
48 FormStructure(const FormData& form);
49 virtual ~FormStructure();
51 // Runs several heuristics against the form fields to determine their possible
53 void DetermineHeuristicTypes(const AutofillMetrics& metric_logger);
55 // Encodes the XML upload request from this FormStructure.
56 bool EncodeUploadRequest(const ServerFieldTypeSet& available_field_types,
57 bool form_was_autofilled,
58 std::string* encoded_xml) const;
60 // Encodes a XML block contains autofill field type from this FormStructure.
61 // This XML will be written VLOG only, never be sent to server. It will
62 // help make FieldAssignments and feed back to autofill server as
64 bool EncodeFieldAssignments(const ServerFieldTypeSet& available_field_types,
65 std::string* encoded_xml) const;
67 // Encodes the XML query request for the set of forms.
68 // All fields are returned in one XML. For example, there are three forms,
69 // with 2, 4, and 3 fields. The returned XML would have type info for 9
70 // fields, first two of which would be for the first form, next 4 for the
71 // second, and the rest is for the third.
72 static bool EncodeQueryRequest(const std::vector<FormStructure*>& forms,
73 std::vector<std::string>* encoded_signatures,
74 std::string* encoded_xml);
76 // Parses the field types from the server query response. |forms| must be the
77 // same as the one passed to EncodeQueryRequest when constructing the query.
78 static void ParseQueryResponse(
79 const std::string& response_xml,
80 const std::vector<FormStructure*>& forms,
81 const AutofillMetrics& metric_logger);
83 // Fills |forms| with the details from the given |form_structures| and their
84 // fields' predicted types.
85 static void GetFieldTypePredictions(
86 const std::vector<FormStructure*>& form_structures,
87 std::vector<FormDataPredictions>* forms);
89 // The unique signature for this form, composed of the target url domain,
90 // the form name, and the form field names in a 64-bit hash.
91 std::string FormSignature() const;
93 // Runs a quick heuristic to rule out forms that are obviously not
94 // auto-fillable, like google/yahoo/msn search, etc.
95 bool IsAutofillable() const;
97 // Resets |autofill_count_| and counts the number of auto-fillable fields.
98 // This is used when we receive server data for form fields. At that time,
99 // we may have more known fields than just the number of fields we matched
101 void UpdateAutofillCount();
103 // Returns true if this form matches the structural requirements for Autofill.
104 bool ShouldBeParsed() const;
106 // Returns true if we should query the crowdsourcing server to determine this
107 // form's field types. If the form includes author-specified types, this will
109 bool ShouldBeCrowdsourced() const;
111 // Sets the field types to be those set for |cached_form|.
112 void UpdateFromCache(const FormStructure& cached_form);
114 // Logs quality metrics for |this|, which should be a user-submitted form.
115 // This method should only be called after the possible field types have been
116 // set for each field. |interaction_time| should be a timestamp corresponding
117 // to the user's first interaction with the form. |submission_time| should be
118 // a timestamp corresponding to the form's submission.
119 void LogQualityMetrics(const AutofillMetrics& metric_logger,
120 const base::TimeTicks& load_time,
121 const base::TimeTicks& interaction_time,
122 const base::TimeTicks& submission_time) const;
124 // Classifies each field in |fields_| based upon its |autocomplete| attribute,
125 // if the attribute is available. The association is stored into the field's
127 // Fills |found_types| with |true| if the attribute is available and neither
128 // empty nor set to the special values "on" or "off" for at least one field.
129 // Fills |found_sections| with |true| if the attribute specifies a section for
130 // at least one field.
131 void ParseFieldTypesFromAutocompleteAttributes(bool* found_types,
132 bool* found_sections);
134 // Determines whether |type| and |field| match.
135 typedef base::Callback<bool(ServerFieldType type,
136 const AutofillField& field)>
137 InputFieldComparator;
139 // Fills in |fields_| that match |types| (via |matches|) with info from
140 // |get_info|. Uses |address_language_code| to determine line separators when
141 // collapsing street address lines into a single-line input text field.
143 const std::vector<ServerFieldType>& types,
144 const InputFieldComparator& matches,
145 const base::Callback<base::string16(const AutofillType&)>& get_info,
146 const std::string& address_language_code,
147 const std::string& app_locale);
149 // Returns the values that can be filled into the form structure for the
150 // given type. For example, there's no way to fill in a value of "The Moon"
151 // into ADDRESS_HOME_STATE if the form only has a
152 // <select autocomplete="region"> with no "The Moon" option. Returns an
153 // empty set if the form doesn't reference the given type or if all inputs
154 // are accepted (e.g., <input type="text" autocomplete="region">).
155 // All returned values are standardized to upper case.
156 std::set<base::string16> PossibleValues(ServerFieldType type);
158 // Gets the form's current value for |type|. For example, it may return
159 // the contents of a text input or the currently selected <option>.
160 base::string16 GetUniqueValue(HtmlFieldType type) const;
162 const AutofillField* field(size_t index) const;
163 AutofillField* field(size_t index);
164 size_t field_count() const;
166 // Returns the number of fields that are able to be autofilled.
167 size_t autofill_count() const { return autofill_count_; }
169 // Used for iterating over the fields.
170 std::vector<AutofillField*>::const_iterator begin() const {
171 return fields_.begin();
173 std::vector<AutofillField*>::const_iterator end() const {
174 return fields_.end();
177 const GURL& source_url() const { return source_url_; }
179 void set_upload_required(UploadRequired required) {
180 upload_required_ = required;
182 UploadRequired upload_required() const { return upload_required_; }
184 // Returns a FormData containing the data this form structure knows about.
185 // |user_submitted| is currently always false.
186 FormData ToFormData() const;
188 bool operator==(const FormData& form) const;
189 bool operator!=(const FormData& form) const;
192 friend class FormStructureTest;
193 FRIEND_TEST_ALL_PREFIXES(AutofillDownloadTest, QueryAndUploadTest);
195 // 64-bit hash of the string - used in FormSignature and unit-tests.
196 static std::string Hash64Bit(const std::string& str);
198 enum EncodeRequestType {
204 // Adds form info to |encompassing_xml_element|. |request_type| indicates if
205 // it is a query or upload.
206 bool EncodeFormRequest(EncodeRequestType request_type,
207 buzz::XmlElement* encompassing_xml_element) const;
209 // Classifies each field in |fields_| into a logical section.
210 // Sections are identified by the heuristic that a logical section should not
211 // include multiple fields of the same autofill type (with some exceptions, as
212 // described in the implementation). Sections are furthermore distinguished
213 // as either credit card or non-credit card sections.
214 // If |has_author_specified_sections| is true, only the second pass --
215 // distinguishing credit card sections from non-credit card ones -- is made.
216 void IdentifySections(bool has_author_specified_sections);
218 // Returns true if field should be skipped when talking to Autofill server.
219 bool ShouldSkipField(const FormFieldData& field) const;
221 size_t active_field_count() const;
223 // The name of the form.
224 base::string16 form_name_;
232 // The number of fields able to be auto-filled.
233 size_t autofill_count_;
235 // A vector of all the input fields in the form.
236 ScopedVector<AutofillField> fields_;
238 // The number of fields counted towards form signature and request to Autofill
240 size_t active_field_count_;
242 // The names of the form input elements, that are part of the form signature.
243 // The string starts with "&" and the names are also separated by the "&"
244 // character. E.g.: "&form_input1_name&form_input2_name&...&form_inputN_name"
245 std::string form_signature_field_names_;
247 // Whether the server expects us to always upload, never upload, or default
248 // to the stored upload rates.
249 UploadRequired upload_required_;
251 // Whether the form includes any field types explicitly specified by the site
252 // author, via the |autocompletetype| attribute.
253 bool has_author_specified_types_;
255 DISALLOW_COPY_AND_ASSIGN(FormStructure);
258 } // namespace autofill
260 #endif // COMPONENTS_AUTOFILL_CORE_BROWSER_FORM_STRUCTURE_H_