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Side by Side Diff: content/browser/browsing_instance.h

Issue 7464009: Removal of Profile from content part 1. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: browser_context Created 9 years, 5 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CONTENT_BROWSER_BROWSING_INSTANCE_H_ 5 #ifndef CONTENT_BROWSER_BROWSING_INSTANCE_H_
6 #define CONTENT_BROWSER_BROWSING_INSTANCE_H_ 6 #define CONTENT_BROWSER_BROWSING_INSTANCE_H_
7 #pragma once 7 #pragma once
8 8
9 #include "base/hash_tables.h" 9 #include "base/hash_tables.h"
10 #include "base/memory/ref_counted.h" 10 #include "base/memory/ref_counted.h"
11 11
12 class GURL; 12 class GURL;
13 class Profile;
14 class SiteInstance; 13 class SiteInstance;
15 14
15 namespace content {
16 class BrowserContext;
17 }
18
16 /////////////////////////////////////////////////////////////////////////////// 19 ///////////////////////////////////////////////////////////////////////////////
17 // 20 //
18 // BrowsingInstance class 21 // BrowsingInstance class
19 // 22 //
20 // A browsing instance corresponds to the notion of a "unit of related browsing 23 // A browsing instance corresponds to the notion of a "unit of related browsing
21 // contexts" in the HTML 5 spec. Intuitively, it represents a collection of 24 // contexts" in the HTML 5 spec. Intuitively, it represents a collection of
22 // tabs and frames that can have script connections to each other. In that 25 // tabs and frames that can have script connections to each other. In that
23 // sense, it reflects the user interface, and not the contents of the tabs and 26 // sense, it reflects the user interface, and not the contents of the tabs and
24 // frames. 27 // frames.
25 // 28 //
26 // We further subdivide a BrowsingInstance into SiteInstances, which represent 29 // We further subdivide a BrowsingInstance into SiteInstances, which represent
27 // the documents within each BrowsingInstance that are from the same site and 30 // the documents within each BrowsingInstance that are from the same site and
28 // thus can have script access to each other. Different SiteInstances can 31 // thus can have script access to each other. Different SiteInstances can
29 // safely run in different processes, because their documents cannot access 32 // safely run in different processes, because their documents cannot access
30 // each other's contents (due to the same origin policy). 33 // each other's contents (due to the same origin policy).
31 // 34 //
32 // It is important to only have one SiteInstance per site within a given 35 // It is important to only have one SiteInstance per site within a given
33 // BrowsingInstance. This is because any two documents from the same site 36 // BrowsingInstance. This is because any two documents from the same site
34 // might be able to script each other if they are in the same BrowsingInstance. 37 // might be able to script each other if they are in the same BrowsingInstance.
35 // Thus, they must be rendered in the same process. 38 // Thus, they must be rendered in the same process.
36 // 39 //
37 // If the process-per-site model is in use, then we ensure that there is only 40 // If the process-per-site model is in use, then we ensure that there is only
38 // one SiteInstance per site for the entire profile, not just for each 41 // one SiteInstance per site for the entire context, not just for each
39 // BrowsingInstance. This reduces the number of renderer processes we create. 42 // BrowsingInstance. This reduces the number of renderer processes we create.
40 // (This is currently only true if --process-per-site is specified at the 43 // (This is currently only true if --process-per-site is specified at the
41 // command line.) 44 // command line.)
42 // 45 //
43 // A BrowsingInstance is live as long as any SiteInstance has a reference to 46 // A BrowsingInstance is live as long as any SiteInstance has a reference to
44 // it. A SiteInstance is live as long as any NavigationEntry or RenderViewHost 47 // it. A SiteInstance is live as long as any NavigationEntry or RenderViewHost
45 // have references to it. Because both classes are RefCounted, they do not 48 // have references to it. Because both classes are RefCounted, they do not
46 // need to be manually deleted. 49 // need to be manually deleted.
47 // 50 //
48 // Currently, the BrowsingInstance class is not visible outside of the 51 // Currently, the BrowsingInstance class is not visible outside of the
49 // SiteInstance class. To get a new SiteInstance that is part of the same 52 // SiteInstance class. To get a new SiteInstance that is part of the same
50 // BrowsingInstance, use SiteInstance::GetRelatedSiteInstance. Because of 53 // BrowsingInstance, use SiteInstance::GetRelatedSiteInstance. Because of
51 // this, BrowsingInstances and SiteInstances are tested together in 54 // this, BrowsingInstances and SiteInstances are tested together in
52 // site_instance_unittest.cc. 55 // site_instance_unittest.cc.
53 // 56 //
54 /////////////////////////////////////////////////////////////////////////////// 57 ///////////////////////////////////////////////////////////////////////////////
55 class BrowsingInstance : public base::RefCounted<BrowsingInstance> { 58 class BrowsingInstance : public base::RefCounted<BrowsingInstance> {
56 public: 59 public:
57 // Create a new BrowsingInstance. 60 // Create a new BrowsingInstance.
58 explicit BrowsingInstance(Profile* profile); 61 explicit BrowsingInstance(content::BrowserContext* context);
59 62
60 // Returns whether the process-per-site model is in use (globally or just for 63 // Returns whether the process-per-site model is in use (globally or just for
61 // the given url), in which case we should ensure there is only one 64 // the given url), in which case we should ensure there is only one
62 // SiteInstance per site for the entire profile, not just for this 65 // SiteInstance per site for the entire context, not just for this
63 // BrowsingInstance. 66 // BrowsingInstance.
64 virtual bool ShouldUseProcessPerSite(const GURL& url); 67 virtual bool ShouldUseProcessPerSite(const GURL& url);
65 68
66 // Get the profile to which this BrowsingInstance belongs. 69 // Get the context to which this BrowsingInstance belongs.
67 Profile* profile() { return profile_; } 70 content::BrowserContext* context() { return context_; }
jam 2011/07/22 16:58:38 nit: browser_context in all this file
68 71
69 // Returns whether this BrowsingInstance has registered a SiteInstance for 72 // Returns whether this BrowsingInstance has registered a SiteInstance for
70 // the site of the given URL. 73 // the site of the given URL.
71 bool HasSiteInstance(const GURL& url); 74 bool HasSiteInstance(const GURL& url);
72 75
73 // Get the SiteInstance responsible for rendering the given URL. Should 76 // Get the SiteInstance responsible for rendering the given URL. Should
74 // create a new one if necessary, but should not create more than one 77 // create a new one if necessary, but should not create more than one
75 // SiteInstance per site. 78 // SiteInstance per site.
76 SiteInstance* GetSiteInstanceForURL(const GURL& url); 79 SiteInstance* GetSiteInstanceForURL(const GURL& url);
77 80
(...skipping 10 matching lines...) Expand all
88 protected: 91 protected:
89 friend class base::RefCounted<BrowsingInstance>; 92 friend class base::RefCounted<BrowsingInstance>;
90 93
91 // Virtual to allow tests to extend it. 94 // Virtual to allow tests to extend it.
92 virtual ~BrowsingInstance(); 95 virtual ~BrowsingInstance();
93 96
94 private: 97 private:
95 // Map of site to SiteInstance, to ensure we only have one SiteInstance per 98 // Map of site to SiteInstance, to ensure we only have one SiteInstance per
96 typedef base::hash_map<std::string, SiteInstance*> SiteInstanceMap; 99 typedef base::hash_map<std::string, SiteInstance*> SiteInstanceMap;
97 100
98 // Map of Profile to SiteInstanceMap, for use in the process-per-site model. 101 // Map of BrowserContext to SiteInstanceMap, for use in the process-per-site
99 // process-per-site model. 102 // model.
100 typedef base::hash_map<Profile*, SiteInstanceMap> ProfileSiteInstanceMap; 103 typedef base::hash_map<content::BrowserContext*, SiteInstanceMap>
104 ContextSiteInstanceMap;
101 105
102 // Returns a pointer to the relevant SiteInstanceMap for this object. If the 106 // Returns a pointer to the relevant SiteInstanceMap for this object. If the
103 // process-per-site model is in use, or if process-per-site-instance is in 107 // process-per-site model is in use, or if process-per-site-instance is in
104 // use and |url| matches a site for which we always use one process (e.g., 108 // use and |url| matches a site for which we always use one process (e.g.,
105 // the new tab page), then this returns the SiteInstanceMap for the entire 109 // the new tab page), then this returns the SiteInstanceMap for the entire
106 // profile. If not, this returns the BrowsingInstance's own private 110 // context. If not, this returns the BrowsingInstance's own private
107 // SiteInstanceMap. 111 // SiteInstanceMap.
108 SiteInstanceMap* GetSiteInstanceMap(Profile* profile, const GURL& url); 112 SiteInstanceMap* GetSiteInstanceMap(content::BrowserContext* context,
113 const GURL& url);
109 114
110 // Utility routine which removes the passed SiteInstance from the passed 115 // Utility routine which removes the passed SiteInstance from the passed
111 // SiteInstanceMap. 116 // SiteInstanceMap.
112 bool RemoveSiteInstanceFromMap(SiteInstanceMap* map, const std::string& site, 117 bool RemoveSiteInstanceFromMap(SiteInstanceMap* map, const std::string& site,
113 SiteInstance* site_instance); 118 SiteInstance* site_instance);
114 119
115 // Common profile to which all SiteInstances in this BrowsingInstance 120 // Common context to which all SiteInstances in this BrowsingInstance
116 // must belong. 121 // must belong.
117 Profile* const profile_; 122 content::BrowserContext* const context_;
118 123
119 // Map of site to SiteInstance, to ensure we only have one SiteInstance per 124 // Map of site to SiteInstance, to ensure we only have one SiteInstance per
120 // site. The site string should be the possibly_invalid_spec() of a GURL 125 // site. The site string should be the possibly_invalid_spec() of a GURL
121 // obtained with SiteInstance::GetSiteForURL. Note that this map may not 126 // obtained with SiteInstance::GetSiteForURL. Note that this map may not
122 // contain every active SiteInstance, because a race exists where two 127 // contain every active SiteInstance, because a race exists where two
123 // SiteInstances can be assigned to the same site. This is ok in rare cases. 128 // SiteInstances can be assigned to the same site. This is ok in rare cases.
124 // This field is only used if we are not using process-per-site. 129 // This field is only used if we are not using process-per-site.
125 SiteInstanceMap site_instance_map_; 130 SiteInstanceMap site_instance_map_;
126 131
127 // Global map of Profile to SiteInstanceMap, for process-per-site. 132 // Global map of BrowserContext to SiteInstanceMap, for process-per-site.
128 static ProfileSiteInstanceMap profile_site_instance_map_; 133 static ContextSiteInstanceMap context_site_instance_map_;
129 134
130 DISALLOW_COPY_AND_ASSIGN(BrowsingInstance); 135 DISALLOW_COPY_AND_ASSIGN(BrowsingInstance);
131 }; 136 };
132 137
133 #endif // CONTENT_BROWSER_BROWSING_INSTANCE_H_ 138 #endif // CONTENT_BROWSER_BROWSING_INSTANCE_H_
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