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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_AUTOFILL_AUTOFILL_XML_PARSER_H_
#define CHROME_BROWSER_AUTOFILL_AUTOFILL_XML_PARSER_H_
#pragma once
#include <vector>
#include "base/basictypes.h"
#include "chrome/browser/autofill/field_types.h"
#include "chrome/browser/autofill/form_structure.h"
#include "third_party/expat/files/lib/expat.h"
#include "third_party/libjingle/source/talk/xmllite/xmlparser.h"
// The base class that contains common functionality between
// AutoFillQueryXmlParser and AutoFillUploadXmlParser.
class AutoFillXmlParser : public buzz::XmlParseHandler {
public:
AutoFillXmlParser();
// Returns true if no parsing errors were encountered.
bool succeeded() const { return succeeded_; }
private:
// A callback for the end of an </element>, called by Expat.
// |context| is a parsing context used to resolve element/attribute names.
// |name| is the name of the element.
virtual void EndElement(buzz::XmlParseContext* context, const char* name);
// The callback for character data between tags (<element>text...</element>).
// |context| is a parsing context used to resolve element/attribute names.
// |text| is a pointer to the beginning of character data (not null
// terminated).
// |len| is the length of the string pointed to by text.
virtual void CharacterData(buzz::XmlParseContext* context, const char* text,
int len);
// The callback for parsing errors.
// |context| is a parsing context used to resolve names.
// |error_code| is a code representing the parsing error.
virtual void Error(buzz::XmlParseContext* context, XML_Error error_code);
// True if parsing succeeded.
bool succeeded_;
DISALLOW_COPY_AND_ASSIGN(AutoFillXmlParser);
};
// The XML parse handler for parsing AutoFill query responses. A typical
// response looks like:
//
// <autofillqueryresponse>
// <field autofilltype="0" />
// <field autofilltype="1" />
// <field autofilltype="3" />
// <field autofilltype="2" />
// </autofillqueryresponse>
//
// Fields are returned in the same order they were sent to the server.
// autofilltype: The server's guess at what type of field this is. 0 is
// unknown, other types are documented in chrome/browser/autofill/field_types.h.
class AutoFillQueryXmlParser : public AutoFillXmlParser {
public:
AutoFillQueryXmlParser(std::vector<AutoFillFieldType>* field_types,
UploadRequired* upload_required);
private:
// A callback for the beginning of a new <element>, called by Expat.
// |context| is a parsing context used to resolve element/attribute names.
// |name| is the name of the element.
// |attrs| is the list of attributes (names and values) for the element.
virtual void StartElement(buzz::XmlParseContext* context, const char* name,
const char** attrs);
// A helper function to retrieve integer values from strings. Raises an
// XML parse error if it fails.
// |context| is the current parsing context.
// |value| is the string to convert.
int GetIntValue(buzz::XmlParseContext* context, const char* attribute);
// The parsed field types.
std::vector<AutoFillFieldType>* field_types_;
// A flag indicating whether the client should upload AutoFill data when this
// form is submitted.
UploadRequired* upload_required_;
DISALLOW_COPY_AND_ASSIGN(AutoFillQueryXmlParser);
};
// The XML parser for handling AutoFill upload responses. Typical upload
// responses look like:
//
// <autofilluploadresponse negativeuploadrate="0.00125" positiveuploadrate="1"/>
//
// The positive upload rate is the percentage of uploads to send to the server
// when something in the users profile matches what they have entered in a form.
// The negative upload rate is the percentage of uploads to send when nothing in
// the form matches what's in the users profile.
// The negative upload rate is typically much lower than the positive upload
// rate.
class AutoFillUploadXmlParser : public AutoFillXmlParser {
public:
AutoFillUploadXmlParser(double* positive_upload_rate,
double* negative_upload_rate);
private:
// A callback for the beginning of a new <element>, called by Expat.
// |context| is a parsing context used to resolve element/attribute names.
// |name| is the name of the element.
// |attrs| is the list of attributes (names and values) for the element.
virtual void StartElement(buzz::XmlParseContext* context, const char* name,
const char** attrs);
// A helper function to retrieve double values from strings. Raises an XML
// parse error if it fails.
// |context| is the current parsing context.
// |value| is the string to convert.
double GetDoubleValue(buzz::XmlParseContext* context, const char* attribute);
// True if parsing succeeded.
bool succeeded_;
double* positive_upload_rate_;
double* negative_upload_rate_;
DISALLOW_COPY_AND_ASSIGN(AutoFillUploadXmlParser);
};
#endif // CHROME_BROWSER_AUTOFILL_AUTOFILL_XML_PARSER_H_
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