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// Copyright (c) 2011 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_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
#define CHROME_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
#pragma once
#include <map>
#include "chrome/common/content_settings.h"
#include "content/renderer/render_view_observer.h"
#include "content/renderer/render_view_observer_tracker.h"
class GURL;
// Handles blocking content per content settings for each RenderView.
class ContentSettingsObserver
: public RenderViewObserver,
public RenderViewObserverTracker<ContentSettingsObserver> {
public:
explicit ContentSettingsObserver(RenderView* render_view);
virtual ~ContentSettingsObserver();
// Sets the content settings that back allowScripts(), allowImages(), and
// allowPlugins().
void SetContentSettings(const ContentSettings& settings);
// Returns the setting for the given type.
ContentSetting GetContentSetting(ContentSettingsType type);
// Sends an IPC notification that the specified content type was blocked.
// If the content type requires it, |resource_identifier| names the specific
// resource that was blocked (the plugin path in the case of plugins),
// otherwise it's the empty string.
void DidBlockContentType(ContentSettingsType settings_type,
const std::string& resource_identifier);
private:
// RenderViewObserver implementation.
virtual bool OnMessageReceived(const IPC::Message& message);
virtual void DidCommitProvisionalLoad(WebKit::WebFrame* frame,
bool is_new_navigation);
virtual bool AllowImages(WebKit::WebFrame* frame, bool enabled_per_settings);
virtual bool AllowPlugins(WebKit::WebFrame* frame, bool enabled_per_settings);
virtual bool AllowScript(WebKit::WebFrame* frame, bool enabled_per_settings);
virtual void DidNotAllowPlugins(WebKit::WebFrame* frame);
virtual void DidNotAllowScript(WebKit::WebFrame* frame);
// Message handlers.
void OnSetContentSettingsForLoadingURL(
const GURL& url,
const ContentSettings& content_settings);
// Helper method that returns if the user wants to block content of type
// |content_type|.
bool AllowContentType(ContentSettingsType settings_type);
// Resets the |content_blocked_| array.
void ClearBlockedContentSettings();
typedef std::map<GURL, ContentSettings> HostContentSettings;
HostContentSettings host_content_settings_;
// Stores if loading of images, scripts, and plugins is allowed.
ContentSettings current_content_settings_;
// Stores if images, scripts, and plugins have actually been blocked.
bool content_blocked_[CONTENT_SETTINGS_NUM_TYPES];
DISALLOW_COPY_AND_ASSIGN(ContentSettingsObserver);
};
#endif // CHROME_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
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