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 #include "chrome/browser/ui/singleton_tabs.h"
6
7 #include "chrome/browser/profiles/profile.h"
8 #include "chrome/browser/search/search.h"
9 #include "chrome/browser/ui/browser.h"
10 #include "chrome/browser/ui/browser_navigator.h"
11 #include "chrome/browser/ui/tabs/tab_strip_model.h"
12 #include "chrome/common/url_constants.h"
13 #include "content/public/browser/browser_url_handler.h"
14 #include "content/public/browser/web_contents.h"
15
16 namespace chrome {
17 namespace {
18
19 // Returns true if two URLs are equal after taking |replacements| into account.
CompareURLsWithReplacements(const GURL & url,const GURL & other,const url_canon::Replacements<char> & replacements)20 bool CompareURLsWithReplacements(
21 const GURL& url,
22 const GURL& other,
23 const url_canon::Replacements<char>& replacements) {
24 if (url == other)
25 return true;
26
27 GURL url_replaced = url.ReplaceComponents(replacements);
28 GURL other_replaced = other.ReplaceComponents(replacements);
29 return url_replaced == other_replaced;
30 }
31
32 } // namespace
33
ShowSingletonTab(Browser * browser,const GURL & url)34 void ShowSingletonTab(Browser* browser, const GURL& url) {
35 NavigateParams params(GetSingletonTabNavigateParams(browser, url));
36 Navigate(¶ms);
37 }
38
ShowSingletonTabRespectRef(Browser * browser,const GURL & url)39 void ShowSingletonTabRespectRef(Browser* browser, const GURL& url) {
40 NavigateParams params(GetSingletonTabNavigateParams(browser, url));
41 params.ref_behavior = NavigateParams::RESPECT_REF;
42 Navigate(¶ms);
43 }
44
ShowSingletonTabOverwritingNTP(Browser * browser,const NavigateParams & params)45 void ShowSingletonTabOverwritingNTP(Browser* browser,
46 const NavigateParams& params) {
47 DCHECK(browser);
48 NavigateParams local_params(params);
49 content::WebContents* contents =
50 browser->tab_strip_model()->GetActiveWebContents();
51 if (contents) {
52 const GURL& contents_url = contents->GetURL();
53 if ((contents_url == GURL(kChromeUINewTabURL) || IsInstantNTP(contents) ||
54 contents_url == GURL(content::kAboutBlankURL)) &&
55 GetIndexOfSingletonTab(&local_params) < 0) {
56 local_params.disposition = CURRENT_TAB;
57 }
58 }
59
60 Navigate(&local_params);
61 }
62
GetSingletonTabNavigateParams(Browser * browser,const GURL & url)63 NavigateParams GetSingletonTabNavigateParams(Browser* browser,
64 const GURL& url) {
65 NavigateParams params(browser, url, content::PAGE_TRANSITION_AUTO_BOOKMARK);
66 params.disposition = SINGLETON_TAB;
67 params.window_action = NavigateParams::SHOW_WINDOW;
68 params.user_gesture = true;
69 params.tabstrip_add_types |= TabStripModel::ADD_INHERIT_OPENER;
70 return params;
71 }
72
73 // Returns the index of an existing singleton tab in |params->browser| matching
74 // the URL specified in |params|.
GetIndexOfSingletonTab(NavigateParams * params)75 int GetIndexOfSingletonTab(NavigateParams* params) {
76 if (params->disposition != SINGLETON_TAB)
77 return -1;
78
79 // In case the URL was rewritten by the BrowserURLHandler we need to ensure
80 // that we do not open another URL that will get redirected to the rewritten
81 // URL.
82 GURL rewritten_url(params->url);
83 bool reverse_on_redirect = false;
84 content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
85 &rewritten_url,
86 params->browser->profile(),
87 &reverse_on_redirect);
88
89 // If there are several matches: prefer the active tab by starting there.
90 int start_index =
91 std::max(0, params->browser->tab_strip_model()->active_index());
92 int tab_count = params->browser->tab_strip_model()->count();
93 for (int i = 0; i < tab_count; ++i) {
94 int tab_index = (start_index + i) % tab_count;
95 content::WebContents* tab =
96 params->browser->tab_strip_model()->GetWebContentsAt(tab_index);
97
98 GURL tab_url = tab->GetURL();
99
100 // Skip view-source tabs. This is needed because RewriteURLIfNecessary
101 // removes the "view-source:" scheme which leads to incorrect matching.
102 if (tab_url.SchemeIs(content::kViewSourceScheme))
103 continue;
104
105 GURL rewritten_tab_url = tab_url;
106 content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
107 &rewritten_tab_url,
108 params->browser->profile(),
109 &reverse_on_redirect);
110
111 url_canon::Replacements<char> replacements;
112 if (params->ref_behavior == NavigateParams::IGNORE_REF)
113 replacements.ClearRef();
114 if (params->path_behavior == NavigateParams::IGNORE_AND_NAVIGATE ||
115 params->path_behavior == NavigateParams::IGNORE_AND_STAY_PUT) {
116 replacements.ClearPath();
117 replacements.ClearQuery();
118 }
119
120 if (CompareURLsWithReplacements(tab_url, params->url, replacements) ||
121 CompareURLsWithReplacements(rewritten_tab_url,
122 rewritten_url,
123 replacements)) {
124 params->target_contents = tab;
125 return tab_index;
126 }
127 }
128
129 return -1;
130 }
131
132 } // namespace chrome
133