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| 1 // Copyright (c) 2010 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 CHROME_COMMON_PAGE_TRANSITION_TYPES_H__ | |
| 6 #define CHROME_COMMON_PAGE_TRANSITION_TYPES_H__ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "base/basictypes.h" | |
| 10 | |
| 11 // This class is for scoping only. | |
| 12 class PageTransition { | |
| 13 public: | |
| 14 // Types of transitions between pages. These are stored in the history | |
| 15 // database to separate visits, and are reported by the renderer for page | |
| 16 // navigations. | |
| 17 // | |
| 18 // WARNING: don't change these numbers. They are written directly into the | |
| 19 // history database, so future versions will need the same values to match | |
| 20 // the enums. | |
| 21 // | |
| 22 // A type is made of a core value and a set of qualifiers. A type has one | |
| 23 // core value and 0 or or more qualifiers. | |
| 24 enum { | |
| 25 // User got to this page by clicking a link on another page. | |
| 26 LINK = 0, | |
| 27 | |
| 28 // User got this page by typing the URL in the URL bar. This should not be | |
| 29 // used for cases where the user selected a choice that didn't look at all | |
| 30 // like a URL; see GENERATED below. | |
| 31 // | |
| 32 // We also use this for other "explicit" navigation actions. | |
| 33 TYPED = 1, | |
| 34 | |
| 35 // User got to this page through a suggestion in the UI, for example, | |
| 36 // through the destinations page. | |
| 37 AUTO_BOOKMARK = 2, | |
| 38 | |
| 39 // This is a subframe navigation. This is any content that is automatically | |
| 40 // loaded in a non-toplevel frame. For example, if a page consists of | |
| 41 // several frames containing ads, those ad URLs will have this transition | |
| 42 // type. The user may not even realize the content in these pages is a | |
| 43 // separate frame, so may not care about the URL (see MANUAL below). | |
| 44 AUTO_SUBFRAME = 3, | |
| 45 | |
| 46 // For subframe navigations that are explicitly requested by the user and | |
| 47 // generate new navigation entries in the back/forward list. These are | |
| 48 // probably more important than frames that were automatically loaded in | |
| 49 // the background because the user probably cares about the fact that this | |
| 50 // link was loaded. | |
| 51 MANUAL_SUBFRAME = 4, | |
| 52 | |
| 53 // User got to this page by typing in the URL bar and selecting an entry | |
| 54 // that did not look like a URL. For example, a match might have the URL | |
| 55 // of a Google search result page, but appear like "Search Google for ...". | |
| 56 // These are not quite the same as TYPED navigations because the user | |
| 57 // didn't type or see the destination URL. | |
| 58 // See also KEYWORD. | |
| 59 GENERATED = 5, | |
| 60 | |
| 61 // The page was specified in the command line or is the start page. | |
| 62 START_PAGE = 6, | |
| 63 | |
| 64 // The user filled out values in a form and submitted it. NOTE that in | |
| 65 // some situations submitting a form does not result in this transition | |
| 66 // type. This can happen if the form uses script to submit the contents. | |
| 67 FORM_SUBMIT = 7, | |
| 68 | |
| 69 // The user "reloaded" the page, either by hitting the reload button or by | |
| 70 // hitting enter in the address bar. NOTE: This is distinct from the | |
| 71 // concept of whether a particular load uses "reload semantics" (i.e. | |
| 72 // bypasses cached data). For this reason, lots of code needs to pass | |
| 73 // around the concept of whether a load should be treated as a "reload" | |
| 74 // separately from their tracking of this transition type, which is mainly | |
| 75 // used for proper scoring for consumers who care about how frequently a | |
| 76 // user typed/visited a particular URL. | |
| 77 // | |
| 78 // SessionRestore and undo tab close use this transition type too. | |
| 79 RELOAD = 8, | |
| 80 | |
| 81 // The url was generated from a replaceable keyword other than the default | |
| 82 // search provider. If the user types a keyword (which also applies to | |
| 83 // tab-to-search) in the omnibox this qualifier is applied to the transition | |
| 84 // type of the generated url. TemplateURLModel then may generate an | |
| 85 // additional visit with a transition type of KEYWORD_GENERATED against the | |
| 86 // url 'http://' + keyword. For example, if you do a tab-to-search against | |
| 87 // wikipedia the generated url has a transition qualifer of KEYWORD, and | |
| 88 // TemplateURLModel generates a visit for 'wikipedia.org' with a transition | |
| 89 // type of KEYWORD_GENERATED. | |
| 90 KEYWORD = 9, | |
| 91 | |
| 92 // Corresponds to a visit generated for a keyword. See description of | |
| 93 // KEYWORD for more details. | |
| 94 KEYWORD_GENERATED = 10, | |
| 95 | |
| 96 // ADDING NEW CORE VALUE? Be sure to update the LAST_CORE and CORE_MASK | |
| 97 // values below. Also update CoreTransitionString(). | |
| 98 LAST_CORE = KEYWORD_GENERATED, | |
| 99 CORE_MASK = 0xFF, | |
| 100 | |
| 101 // Qualifiers | |
| 102 // Any of the core values above can be augmented by one or more qualifiers. | |
| 103 // These qualifiers further define the transition. | |
| 104 | |
| 105 // User used the Forward or Back button to navigate among browsing history. | |
| 106 FORWARD_BACK = 0x01000000, | |
| 107 | |
| 108 // The beginning of a navigation chain. | |
| 109 CHAIN_START = 0x10000000, | |
| 110 | |
| 111 // The last transition in a redirect chain. | |
| 112 CHAIN_END = 0x20000000, | |
| 113 | |
| 114 // Redirects caused by JavaScript or a meta refresh tag on the page. | |
| 115 CLIENT_REDIRECT = 0x40000000, | |
| 116 | |
| 117 // Redirects sent from the server by HTTP headers. It might be nice to | |
| 118 // break this out into 2 types in the future, permanent or temporary, if we | |
| 119 // can get that information from WebKit. | |
| 120 SERVER_REDIRECT = 0x80000000, | |
| 121 | |
| 122 // Used to test whether a transition involves a redirect. | |
| 123 IS_REDIRECT_MASK = 0xC0000000, | |
| 124 | |
| 125 // General mask defining the bits used for the qualifiers. | |
| 126 QUALIFIER_MASK = 0xFFFFFF00 | |
| 127 }; | |
| 128 | |
| 129 // The type used for the bitfield. | |
| 130 typedef unsigned int Type; | |
| 131 | |
| 132 static bool ValidType(int32 type) { | |
| 133 Type t = StripQualifier(static_cast<Type>(type)); | |
| 134 return (t <= LAST_CORE); | |
| 135 } | |
| 136 | |
| 137 static Type FromInt(int32 type); | |
| 138 | |
| 139 // Returns true if the given transition is a top-level frame transition, or | |
| 140 // false if the transition was for a subframe. | |
| 141 static bool IsMainFrame(Type type) { | |
| 142 int32 t = StripQualifier(type); | |
| 143 return (t != AUTO_SUBFRAME && t != MANUAL_SUBFRAME); | |
| 144 } | |
| 145 | |
| 146 // Returns whether a transition involves a redirection | |
| 147 static bool IsRedirect(Type type) { | |
| 148 return (type & IS_REDIRECT_MASK) != 0; | |
| 149 } | |
| 150 | |
| 151 // Simplifies the provided transition by removing any qualifier | |
| 152 static Type StripQualifier(Type type) { | |
| 153 return static_cast<Type>(type & ~QUALIFIER_MASK); | |
| 154 } | |
| 155 | |
| 156 // Return the qualifier | |
| 157 static int32 GetQualifier(Type type) { | |
| 158 return type & QUALIFIER_MASK; | |
| 159 } | |
| 160 | |
| 161 // Return a string version of the core type values. | |
| 162 static const char* CoreTransitionString(Type type); | |
| 163 }; | |
| 164 | |
| 165 #endif // CHROME_COMMON_PAGE_TRANSITION_TYPES_H__ | |
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