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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_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
#define CHROME_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
#include <map>
#include <set>
#include "chrome/common/content_settings.h"
#include "content/public/renderer/render_view_observer.h"
#include "content/public/renderer/render_view_observer_tracker.h"
class GURL;
namespace WebKit {
class WebFrame;
class WebSecurityOrigin;
class WebURL;
}
// Handles blocking content per content settings for each RenderView.
class ContentSettingsObserver
: public content::RenderViewObserver,
public content::RenderViewObserverTracker<ContentSettingsObserver> {
public:
explicit ContentSettingsObserver(content::RenderView* render_view);
virtual ~ContentSettingsObserver();
// Sets the content setting rules which back |AllowImage()|, |AllowScript()|,
// and |AllowScriptFromSource()|. |content_setting_rules| must outlive this
// |ContentSettingsObserver|.
void SetContentSettingRules(
const RendererContentSettingRules* content_setting_rules);
bool IsPluginTemporarilyAllowed(const std::string& identifier);
// 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);
// These correspond to WebKit::WebPermissionClient methods.
bool AllowDatabase(WebKit::WebFrame* frame,
const WebKit::WebString& name,
const WebKit::WebString& display_name,
unsigned long estimated_size);
bool AllowFileSystem(WebKit::WebFrame* frame);
bool AllowImage(WebKit::WebFrame* frame,
bool enabled_per_settings,
const WebKit::WebURL& image_url);
bool AllowIndexedDB(WebKit::WebFrame* frame,
const WebKit::WebString& name,
const WebKit::WebSecurityOrigin& origin);
bool AllowPlugins(WebKit::WebFrame* frame, bool enabled_per_settings);
bool AllowScript(WebKit::WebFrame* frame, bool enabled_per_settings);
bool AllowScriptFromSource(WebKit::WebFrame* frame, bool enabled_per_settings,
const WebKit::WebURL& script_url);
bool AllowStorage(WebKit::WebFrame* frame, bool local);
void DidNotAllowPlugins();
void DidNotAllowScript();
void DidNotAllowMixedScript();
private:
FRIEND_TEST_ALL_PREFIXES(ContentSettingsObserverTest, WhitelistedSchemes);
FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest,
ContentSettingsInterstitialPages);
// RenderViewObserver implementation.
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void DidCommitProvisionalLoad(WebKit::WebFrame* frame,
bool is_new_navigation) OVERRIDE;
// Message handlers.
void OnLoadBlockedPlugins(const std::string& identifier);
void OnSetAsInterstitial();
// Resets the |content_blocked_| array.
void ClearBlockedContentSettings();
// Helpers.
// True if |frame| contains content that is white-listed for content settings.
static bool IsWhitelistedForContentSettings(WebKit::WebFrame* frame);
static bool IsWhitelistedForContentSettings(
const WebKit::WebSecurityOrigin& origin,
const GURL& document_url);
// A pointer to content setting rules stored by the renderer. Normally, the
// |RendererContentSettingRules| object is owned by
// |ChromeRenderProcessObserver|. In the tests it is owned by the caller of
// |SetContentSettingRules|.
const RendererContentSettingRules* content_setting_rules_;
// Stores if images, scripts, and plugins have actually been blocked.
bool content_blocked_[CONTENT_SETTINGS_NUM_TYPES];
// Caches the result of AllowStorage.
typedef std::pair<GURL, bool> StoragePermissionsKey;
std::map<StoragePermissionsKey, bool> cached_storage_permissions_;
// Caches the result of |AllowScript|.
std::map<WebKit::WebFrame*, bool> cached_script_permissions_;
std::set<std::string> temporarily_allowed_plugins_;
bool is_interstitial_page_;
DISALLOW_COPY_AND_ASSIGN(ContentSettingsObserver);
};
#endif // CHROME_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
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