1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_ 6 #define CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_ 7 8 #include "content/browser/renderer_host/render_process_host_impl.h" 9 #include "content/common/content_export.h" 10 #include "content/public/browser/render_process_host_observer.h" 11 #include "content/public/browser/site_instance.h" 12 #include "url/gurl.h" 13 14 namespace content { 15 class BrowsingInstance; 16 class RenderProcessHostFactory; 17 18 class CONTENT_EXPORT SiteInstanceImpl : public SiteInstance, 19 public RenderProcessHostObserver { 20 public: 21 // SiteInstance interface overrides. 22 virtual int32 GetId() OVERRIDE; 23 virtual bool HasProcess() const OVERRIDE; 24 virtual RenderProcessHost* GetProcess() OVERRIDE; 25 virtual BrowserContext* GetBrowserContext() const OVERRIDE; 26 virtual const GURL& GetSiteURL() const OVERRIDE; 27 virtual SiteInstance* GetRelatedSiteInstance(const GURL& url) OVERRIDE; 28 virtual bool IsRelatedSiteInstance(const SiteInstance* instance) OVERRIDE; 29 virtual size_t GetRelatedActiveContentsCount() OVERRIDE; 30 31 // Set the web site that this SiteInstance is rendering pages for. 32 // This includes the scheme and registered domain, but not the port. If the 33 // URL does not have a valid registered domain, then the full hostname is 34 // stored. 35 void SetSite(const GURL& url); 36 bool HasSite() const; 37 38 // Returns whether there is currently a related SiteInstance (registered with 39 // BrowsingInstance) for the site of the given url. If so, we should try to 40 // avoid dedicating an unused SiteInstance to it (e.g., in a new tab). 41 bool HasRelatedSiteInstance(const GURL& url); 42 43 // Returns whether this SiteInstance has a process that is the wrong type for 44 // the given URL. If so, the browser should force a process swap when 45 // navigating to the URL. 46 bool HasWrongProcessForURL(const GURL& url); 47 48 // Increase the number of active views in this SiteInstance. This is 49 // increased when a view is created, or a currently swapped out view 50 // is swapped in. 51 void increment_active_view_count() { active_view_count_++; } 52 53 // Decrease the number of active views in this SiteInstance. This is 54 // decreased when a view is destroyed, or a currently active view is 55 // swapped out. 56 void decrement_active_view_count() { active_view_count_--; } 57 58 // Get the number of active views which belong to this 59 // SiteInstance. If there is no active view left in this 60 // SiteInstance, all view in this SiteInstance can be safely 61 // discarded to save memory. 62 size_t active_view_count() { return active_view_count_; } 63 64 // Increase the number of active WebContentses using this SiteInstance. Note 65 // that, unlike active_view_count, this does not count pending RVHs. 66 void IncrementRelatedActiveContentsCount(); 67 68 // Decrease the number of active WebContentses using this SiteInstance. Note 69 // that, unlike active_view_count, this does not count pending RVHs. 70 void DecrementRelatedActiveContentsCount(); 71 72 // Sets the global factory used to create new RenderProcessHosts. It may be 73 // NULL, in which case the default BrowserRenderProcessHost will be created 74 // (this is the behavior if you don't call this function). The factory must 75 // be set back to NULL before it's destroyed; ownership is not transferred. 76 static void set_render_process_host_factory( 77 const RenderProcessHostFactory* rph_factory); 78 79 // Get the effective URL for the given actual URL. This allows the 80 // ContentBrowserClient to override the SiteInstance's site for certain URLs. 81 // For example, Chrome uses this to replace hosted app URLs with extension 82 // hosts. 83 // Only public so that we can make a consistent process swap decision in 84 // RenderFrameHostManager. 85 static GURL GetEffectiveURL(BrowserContext* browser_context, 86 const GURL& url); 87 88 protected: 89 friend class BrowsingInstance; 90 friend class SiteInstance; 91 92 // Virtual to allow tests to extend it. 93 virtual ~SiteInstanceImpl(); 94 95 // Create a new SiteInstance. Protected to give access to BrowsingInstance 96 // and tests; most callers should use Create or GetRelatedSiteInstance 97 // instead. 98 explicit SiteInstanceImpl(BrowsingInstance* browsing_instance); 99 100 private: 101 // RenderProcessHostObserver implementation. 102 virtual void RenderProcessHostDestroyed(RenderProcessHost* host) OVERRIDE; 103 104 // Used to restrict a process' origin access rights. 105 void LockToOrigin(); 106 107 // An object used to construct RenderProcessHosts. 108 static const RenderProcessHostFactory* g_render_process_host_factory_; 109 110 // The next available SiteInstance ID. 111 static int32 next_site_instance_id_; 112 113 // A unique ID for this SiteInstance. 114 int32 id_; 115 116 // The number of active views under this SiteInstance. 117 size_t active_view_count_; 118 119 // BrowsingInstance to which this SiteInstance belongs. 120 scoped_refptr<BrowsingInstance> browsing_instance_; 121 122 // Current RenderProcessHost that is rendering pages for this SiteInstance. 123 // This pointer will only change once the RenderProcessHost is destructed. It 124 // will still remain the same even if the process crashes, since in that 125 // scenario the RenderProcessHost remains the same. 126 RenderProcessHost* process_; 127 128 // The web site that this SiteInstance is rendering pages for. 129 GURL site_; 130 131 // Whether SetSite has been called. 132 bool has_site_; 133 134 DISALLOW_COPY_AND_ASSIGN(SiteInstanceImpl); 135 }; 136 137 } // namespace content 138 139 #endif // CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_ 140
