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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/singleton_tabs.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search/search.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/common/url_constants.h"
#include "content/public/browser/browser_url_handler.h"
#include "content/public/browser/web_contents.h"
namespace chrome {
namespace {
// Returns true if two URLs are equal after taking |replacements| into account.
bool CompareURLsWithReplacements(
const GURL& url,
const GURL& other,
const url_canon::Replacements<char>& replacements) {
if (url == other)
return true;
GURL url_replaced = url.ReplaceComponents(replacements);
GURL other_replaced = other.ReplaceComponents(replacements);
return url_replaced == other_replaced;
}
} // namespace
void ShowSingletonTab(Browser* browser, const GURL& url) {
NavigateParams params(GetSingletonTabNavigateParams(browser, url));
Navigate(¶ms);
}
void ShowSingletonTabRespectRef(Browser* browser, const GURL& url) {
NavigateParams params(GetSingletonTabNavigateParams(browser, url));
params.ref_behavior = NavigateParams::RESPECT_REF;
Navigate(¶ms);
}
void ShowSingletonTabOverwritingNTP(Browser* browser,
const NavigateParams& params) {
DCHECK(browser);
NavigateParams local_params(params);
content::WebContents* contents =
browser->tab_strip_model()->GetActiveWebContents();
if (contents) {
const GURL& contents_url = contents->GetURL();
if ((contents_url == GURL(kChromeUINewTabURL) || IsInstantNTP(contents) ||
contents_url == GURL(content::kAboutBlankURL)) &&
GetIndexOfSingletonTab(&local_params) < 0) {
local_params.disposition = CURRENT_TAB;
}
}
Navigate(&local_params);
}
NavigateParams GetSingletonTabNavigateParams(Browser* browser,
const GURL& url) {
NavigateParams params(browser, url, content::PAGE_TRANSITION_AUTO_BOOKMARK);
params.disposition = SINGLETON_TAB;
params.window_action = NavigateParams::SHOW_WINDOW;
params.user_gesture = true;
params.tabstrip_add_types |= TabStripModel::ADD_INHERIT_OPENER;
return params;
}
// Returns the index of an existing singleton tab in |params->browser| matching
// the URL specified in |params|.
int GetIndexOfSingletonTab(NavigateParams* params) {
if (params->disposition != SINGLETON_TAB)
return -1;
// In case the URL was rewritten by the BrowserURLHandler we need to ensure
// that we do not open another URL that will get redirected to the rewritten
// URL.
GURL rewritten_url(params->url);
bool reverse_on_redirect = false;
content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
&rewritten_url,
params->browser->profile(),
&reverse_on_redirect);
// If there are several matches: prefer the active tab by starting there.
int start_index =
std::max(0, params->browser->tab_strip_model()->active_index());
int tab_count = params->browser->tab_strip_model()->count();
for (int i = 0; i < tab_count; ++i) {
int tab_index = (start_index + i) % tab_count;
content::WebContents* tab =
params->browser->tab_strip_model()->GetWebContentsAt(tab_index);
GURL tab_url = tab->GetURL();
// Skip view-source tabs. This is needed because RewriteURLIfNecessary
// removes the "view-source:" scheme which leads to incorrect matching.
if (tab_url.SchemeIs(content::kViewSourceScheme))
continue;
GURL rewritten_tab_url = tab_url;
content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
&rewritten_tab_url,
params->browser->profile(),
&reverse_on_redirect);
url_canon::Replacements<char> replacements;
if (params->ref_behavior == NavigateParams::IGNORE_REF)
replacements.ClearRef();
if (params->path_behavior == NavigateParams::IGNORE_AND_NAVIGATE ||
params->path_behavior == NavigateParams::IGNORE_AND_STAY_PUT) {
replacements.ClearPath();
replacements.ClearQuery();
}
if (CompareURLsWithReplacements(tab_url, params->url, replacements) ||
CompareURLsWithReplacements(rewritten_tab_url,
rewritten_url,
replacements)) {
params->target_contents = tab;
return tab_index;
}
}
return -1;
}
} // namespace chrome
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