chrome/browser/ui/singleton_tabs.cc

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