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// Copyright (c) 2012 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_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_
#define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "extensions/browser/declarative_user_script_master.h"
#include "extensions/common/user_script.h"
namespace base {
class Value;
class DictionaryValue;
}
namespace content {
class BrowserContext;
class WebContents;
}
namespace extensions {
class Extension;
// Base class for all ContentActions of the declarative content API.
class ContentAction {
public:
struct ApplyInfo {
const Extension* extension;
content::BrowserContext* browser_context;
content::WebContents* tab;
int priority;
};
virtual ~ContentAction();
// Applies or reverts this ContentAction on a particular tab for a particular
// extension. Revert exists to keep the actions up to date as the page
// changes. Reapply exists to reapply changes to a new page, even if the
// previous page also matched relevant conditions.
virtual void Apply(const ApplyInfo& apply_info) const = 0;
virtual void Reapply(const ApplyInfo& apply_info) const = 0;
virtual void Revert(const ApplyInfo& apply_info) const = 0;
// Factory method that instantiates a concrete ContentAction implementation
// according to |json_action|, the representation of the ContentAction as
// received from the extension API. Sets |error| and returns NULL in case of
// an error.
static scoped_ptr<ContentAction> Create(
content::BrowserContext* browser_context,
const Extension* extension,
const base::Value& json_action,
std::string* error);
protected:
ContentAction();
};
// Action that injects a content script.
class RequestContentScript : public ContentAction {
public:
struct ScriptData;
RequestContentScript(content::BrowserContext* browser_context,
const Extension* extension,
const ScriptData& script_data);
RequestContentScript(DeclarativeUserScriptMaster* master,
const Extension* extension,
const ScriptData& script_data);
~RequestContentScript() override;
static scoped_ptr<ContentAction> Create(
content::BrowserContext* browser_context,
const Extension* extension,
const base::DictionaryValue* dict,
std::string* error);
static scoped_ptr<ContentAction> CreateForTest(
DeclarativeUserScriptMaster* master,
const Extension* extension,
const base::Value& json_action,
std::string* error);
static bool InitScriptData(const base::DictionaryValue* dict,
std::string* error,
ScriptData* script_data);
// Implementation of ContentAction:
void Apply(const ApplyInfo& apply_info) const override;
void Reapply(const ApplyInfo& apply_info) const override;
void Revert(const ApplyInfo& apply_info) const override;
private:
void InitScript(const HostID& host_id,
const Extension* extension,
const ScriptData& script_data);
void AddScript() {
DCHECK(master_);
master_->AddScript(script_);
}
void InstructRenderProcessToInject(content::WebContents* contents,
const Extension* extension) const;
UserScript script_;
DeclarativeUserScriptMaster* master_;
DISALLOW_COPY_AND_ASSIGN(RequestContentScript);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_
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