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// Copyright 2012 The Chromium Authors
// 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 <memory>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "base/values.h"
#include "extensions/browser/user_script_loader.h"
#include "extensions/buildflags/buildflags.h"
#include "extensions/common/mojom/host_id.mojom-forward.h"
#include "extensions/common/user_script.h"
static_assert(BUILDFLAG(ENABLE_EXTENSIONS_CORE));
namespace content {
class BrowserContext;
class WebContents;
}
namespace extensions {
class Extension;
class ExtensionUserScriptLoader;
// Base class for all ContentActions of the Declarative Content API.
//
// For example, given the sample code at
// https://developer.chrome.com/extensions/declarativeContent#rules, the entity
// rule1['actions'][0] is represented by a ContentAction subclass.
class ContentAction {
public:
struct ApplyInfo {
raw_ptr<const Extension> extension;
raw_ptr<content::BrowserContext> browser_context;
raw_ptr<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 std::unique_ptr<ContentAction> Create(
content::BrowserContext* browser_context,
const Extension* extension,
const base::Value::Dict& json_action_dict,
std::string* error);
static void SetAllowInvisibleIconsForTest(bool value);
protected:
ContentAction();
};
// Action that injects a content script.
class RequestContentScript : public ContentAction,
public UserScriptLoader::Observer {
public:
struct ScriptData;
RequestContentScript(content::BrowserContext* browser_context,
const Extension* extension,
const ScriptData& script_data);
RequestContentScript(const RequestContentScript&) = delete;
RequestContentScript& operator=(const RequestContentScript&) = delete;
~RequestContentScript() override;
static std::unique_ptr<ContentAction> Create(
content::BrowserContext* browser_context,
const Extension* extension,
const base::Value::Dict* dict,
std::string* error);
static bool InitScriptData(const base::Value::Dict* 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 mojom::HostID& host_id,
const Extension* extension,
const ScriptData& script_data);
void AddScript();
void InstructRenderProcessToInject(content::WebContents* contents,
const Extension* extension) const;
// UserScriptLoader::Observer:
void OnScriptsLoaded(UserScriptLoader* loader,
content::BrowserContext* browser_context) override;
void OnUserScriptLoaderDestroyed(UserScriptLoader* loader) override;
UserScript script_;
raw_ptr<ExtensionUserScriptLoader> script_loader_ = nullptr;
base::ScopedObservation<UserScriptLoader, UserScriptLoader::Observer>
scoped_observation_{this};
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_CONTENT_ACTION_H_
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