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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 CHROME_BROWSER_HISTORY_TOP_SITES_CACHE_H_ | 5 #ifndef CHROME_BROWSER_HISTORY_TOP_SITES_CACHE_H_ |
6 #define CHROME_BROWSER_HISTORY_TOP_SITES_CACHE_H_ | 6 #define CHROME_BROWSER_HISTORY_TOP_SITES_CACHE_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <utility> | 9 #include <utility> |
10 | 10 |
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38 // ignoring "?query#ref". | 38 // ignoring "?query#ref". |
39 // For the latter two "URL prefix matches", we prefer the match that is closest | 39 // For the latter two "URL prefix matches", we prefer the match that is closest |
40 // to input URL, w.r.t. path hierarchy. | 40 // to input URL, w.r.t. path hierarchy. |
41 | 41 |
42 // TopSitesCache caches the top sites and thumbnails for TopSites. | 42 // TopSitesCache caches the top sites and thumbnails for TopSites. |
43 class TopSitesCache { | 43 class TopSitesCache { |
44 public: | 44 public: |
45 TopSitesCache(); | 45 TopSitesCache(); |
46 ~TopSitesCache(); | 46 ~TopSitesCache(); |
47 | 47 |
48 // The top sites. | 48 // Set the top sites. In |top_sites| all forced URLs must appear before |
49 // non-forced URLs. This is only checked in debug. | |
49 void SetTopSites(const MostVisitedURLList& top_sites); | 50 void SetTopSites(const MostVisitedURLList& top_sites); |
50 const MostVisitedURLList& top_sites() const { return top_sites_; } | 51 const MostVisitedURLList& top_sites() const { return top_sites_; } |
51 | 52 |
52 // The thumbnails. | 53 // The thumbnails. |
53 void SetThumbnails(const URLToImagesMap& images); | 54 void SetThumbnails(const URLToImagesMap& images); |
54 const URLToImagesMap& images() const { return images_; } | 55 const URLToImagesMap& images() const { return images_; } |
55 | 56 |
56 // Returns the thumbnail as an Image for the specified url. This adds an entry | 57 // Returns the thumbnail as an Image for the specified url. This adds an entry |
57 // for |url| if one has not yet been added. | 58 // for |url| if one has not yet been added. |
58 Images* GetImage(const GURL& url); | 59 Images* GetImage(const GURL& url); |
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79 // Similar to GetSpecializedCanonicalURL(), but searches for a URL in | 80 // Similar to GetSpecializedCanonicalURL(), but searches for a URL in |
80 // |canonical_urls_| that is a URL prefix of |url|, and leaset generalized. | 81 // |canonical_urls_| that is a URL prefix of |url|, and leaset generalized. |
81 GURL GetGeneralizedCanonicalURL(const GURL& url) const; | 82 GURL GetGeneralizedCanonicalURL(const GURL& url) const; |
82 | 83 |
83 // Returns true if |url| is known. | 84 // Returns true if |url| is known. |
84 bool IsKnownURL(const GURL& url) const; | 85 bool IsKnownURL(const GURL& url) const; |
85 | 86 |
86 // Returns the index into |top_sites_| for |url|. | 87 // Returns the index into |top_sites_| for |url|. |
87 size_t GetURLIndex(const GURL& url) const; | 88 size_t GetURLIndex(const GURL& url) const; |
88 | 89 |
90 // Returns the number of non-forced URLs in the cache. | |
91 size_t GetNbNonForcedURLs() const; | |
brettw
2013/11/08 22:56:07
"Nb"?
beaudoin
2013/11/11 21:58:09
Done.
| |
92 | |
93 // Returns the number of forced URLs in the cache. | |
94 size_t GetNbForcedURLs() const; | |
95 | |
89 private: | 96 private: |
90 // The entries in CanonicalURLs, see CanonicalURLs for details. The second | 97 // The entries in CanonicalURLs, see CanonicalURLs for details. The second |
91 // argument gives the index of the URL into MostVisitedURLs redirects. | 98 // argument gives the index of the URL into MostVisitedURLs redirects. |
92 typedef std::pair<MostVisitedURL*, size_t> CanonicalURLEntry; | 99 typedef std::pair<MostVisitedURL*, size_t> CanonicalURLEntry; |
93 | 100 |
94 // Comparator used for CanonicalURLs. | 101 // Comparator used for CanonicalURLs. |
95 class CanonicalURLComparator { | 102 class CanonicalURLComparator { |
96 public: | 103 public: |
97 bool operator()(const CanonicalURLEntry& e1, | 104 bool operator()(const CanonicalURLEntry& e1, |
98 const CanonicalURLEntry& e2) const { | 105 const CanonicalURLEntry& e2) const { |
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117 // This is used to map from redirect url to the MostVisitedURL the redirect is | 124 // This is used to map from redirect url to the MostVisitedURL the redirect is |
118 // from. Ideally this would be map<GURL, size_t> (second param indexing into | 125 // from. Ideally this would be map<GURL, size_t> (second param indexing into |
119 // top_sites_), but this results in duplicating all redirect urls. As some | 126 // top_sites_), but this results in duplicating all redirect urls. As some |
120 // sites have a lot of redirects, we instead use the MostVisitedURL* and the | 127 // sites have a lot of redirects, we instead use the MostVisitedURL* and the |
121 // index of the redirect as the key, and the index into top_sites_ as the | 128 // index of the redirect as the key, and the index into top_sites_ as the |
122 // value. This way we aren't duplicating GURLs. CanonicalURLComparator | 129 // value. This way we aren't duplicating GURLs. CanonicalURLComparator |
123 // enforces the ordering as if we were using GURLs. | 130 // enforces the ordering as if we were using GURLs. |
124 typedef std::map<CanonicalURLEntry, size_t, | 131 typedef std::map<CanonicalURLEntry, size_t, |
125 CanonicalURLComparator> CanonicalURLs; | 132 CanonicalURLComparator> CanonicalURLs; |
126 | 133 |
134 // Count the number of forced URLs. | |
135 void CountForcedURLs(); | |
136 | |
127 // Generates the set of canonical urls from |top_sites_|. | 137 // Generates the set of canonical urls from |top_sites_|. |
128 void GenerateCanonicalURLs(); | 138 void GenerateCanonicalURLs(); |
129 | 139 |
130 // Stores a set of redirects. This is used by GenerateCanonicalURLs. | 140 // Stores a set of redirects. This is used by GenerateCanonicalURLs. |
131 void StoreRedirectChain(const RedirectList& redirects, size_t destination); | 141 void StoreRedirectChain(const RedirectList& redirects, size_t destination); |
132 | 142 |
133 // Returns the iterator into |canonical_urls_| for the |url|. | 143 // Returns the iterator into |canonical_urls_| for the |url|. |
134 CanonicalURLs::const_iterator GetCanonicalURLsIterator(const GURL& url) const; | 144 CanonicalURLs::const_iterator GetCanonicalURLsIterator(const GURL& url) const; |
135 | 145 |
136 // Returns the GURL corresponding to an iterator in |canonical_urls_|. | 146 // Returns the GURL corresponding to an iterator in |canonical_urls_|. |
137 const GURL& GetURLFromIterator(CanonicalURLs::const_iterator it) const; | 147 const GURL& GetURLFromIterator(CanonicalURLs::const_iterator it) const; |
138 | 148 |
139 // The top sites. | 149 // The number of top sites with forced URLs. |
150 size_t nb_forced_urls_; | |
151 | |
152 // The top sites. This list must always contain the forced URLs first followed | |
153 // by the non-forced URLs. This is not strictly enforced but is checked in | |
154 // debug. | |
140 MostVisitedURLList top_sites_; | 155 MostVisitedURLList top_sites_; |
141 | 156 |
142 // The images. These map from canonical url to image. | 157 // The images. These map from canonical url to image. |
143 URLToImagesMap images_; | 158 URLToImagesMap images_; |
144 | 159 |
145 // Generated from the redirects to and from the most visited pages. See | 160 // Generated from the redirects to and from the most visited pages. See |
146 // description above typedef for details. | 161 // description above typedef for details. |
147 CanonicalURLs canonical_urls_; | 162 CanonicalURLs canonical_urls_; |
148 | 163 |
149 // Helper to clear "?query#ref" from any GURL. This is set in the constructor | 164 // Helper to clear "?query#ref" from any GURL. This is set in the constructor |
150 // and never modified after. | 165 // and never modified after. |
151 GURL::Replacements clear_query_ref_; | 166 GURL::Replacements clear_query_ref_; |
152 | 167 |
153 // Helper to clear "/path?query#ref" from any GURL. This is set in the | 168 // Helper to clear "/path?query#ref" from any GURL. This is set in the |
154 // constructor and never modified after. | 169 // constructor and never modified after. |
155 GURL::Replacements clear_path_query_ref_; | 170 GURL::Replacements clear_path_query_ref_; |
156 | 171 |
157 DISALLOW_COPY_AND_ASSIGN(TopSitesCache); | 172 DISALLOW_COPY_AND_ASSIGN(TopSitesCache); |
158 }; | 173 }; |
159 | 174 |
160 } // namespace history | 175 } // namespace history |
161 | 176 |
162 #endif // CHROME_BROWSER_HISTORY_TOP_SITES_CACHE_H_ | 177 #endif // CHROME_BROWSER_HISTORY_TOP_SITES_CACHE_H_ |
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