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