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// Copyright (c) 2008 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_EXTENSIONS_USER_SCRIPT_SLAVE_H_
#define CHROME_BROWSER_EXTENSIONS_USER_SCRIPT_SLAVE_H_
#include "base/scoped_ptr.h"
#include "base/shared_memory.h"
#include "base/string_piece.h"
#include "base/string_util.h"
#include "testing/gtest/include/gtest/gtest_prod.h"
#include "webkit/glue/webframe.h"
// Parsed representation of a user script.
class UserScript {
public:
UserScript(const StringPiece& script_url,
const StringPiece& body)
: url_(script_url), body_(body) {}
// Gets a URL where this script can be found.
const StringPiece& GetURL() const {
return url_;
}
// Gets the script body that should be injected into matching content.
const StringPiece& GetBody() const {
return body_;
}
// Adds an include pattern that will be checked to determine whether to
// include a script on a given page.
void AddInclude(const std::string &glob_pattern);
// Returns true if the script should be applied to the specified URL, false
// otherwise.
bool MatchesUrl(const GURL& url);
private:
FRIEND_TEST(UserScriptSlaveTest, EscapeGlob);
// Helper function to convert the user script glob format to the patterns
// used internally to test URLs.
static std::string EscapeGlob(const std::string& glob);
// The url of the file the script came from. This references shared_memory_,
// and is valid until that memory is either deleted or Unmap()'d.
StringPiece url_;
// The body of the script, which will be injected into content pages. This
// references shared_memory_, and is valid until that memory is either
// deleted or Unmap()'d.
StringPiece body_;
// List of patterns to test URLs against for this script. These patterns have
// been escaped for use with MatchPattern() in string_utils ('?' and '\' are
// escaped).
std::vector<std::string> include_patterns_;
};
// Manages installed UserScripts for a render process.
class UserScriptSlave {
public:
UserScriptSlave();
// Update the parsed scripts from shared memory.
bool UpdateScripts(base::SharedMemoryHandle shared_memory);
// Inject the appropriate scripts into a frame based on its URL.
// TODO(aa): Extract a UserScriptFrame interface out of this to improve
// testability.
bool InjectScripts(WebFrame* frame);
private:
// Shared memory containing raw script data.
scoped_ptr<base::SharedMemory> shared_memory_;
// Parsed script data.
std::vector<UserScript> scripts_;
// Greasemonkey API source that is injected with the scripts.
StringPiece api_js_;
// The line number of the first line of the user script among all of the
// injected javascript. This is used to make reported errors correspond with
// the proper line in the user script.
int user_script_start_line_;
DISALLOW_COPY_AND_ASSIGN(UserScriptSlave);
};
#endif // CHROME_BROWSER_EXTENSIONS_USER_SCRIPT_SLAVE_H_
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