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// Copyright 2012 The Chromium Authors
// 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/autocomplete/chrome_autocomplete_provider_client.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search/search.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/browser/ui/browser_navigator_params.h"
#include "chrome/browser/ui/scoped_tabbed_browser_displayer.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"
#if BUILDFLAG(IS_CHROMEOS_ASH)
#include "ash/constants/ash_switches.h"
#include "chrome/browser/ash/crosapi/browser_util.h"
#include "chrome/browser/ash/url_handler.h"
#endif
namespace {
// Returns true if two URLs are equal after taking |replacements| into account.
bool CompareURLsWithReplacements(const GURL& url,
const GURL& other,
const GURL::Replacements& replacements,
ChromeAutocompleteProviderClient* client) {
GURL url_replaced = url.ReplaceComponents(replacements);
GURL other_replaced = other.ReplaceComponents(replacements);
return client->StrippedURLsAreEqual(url_replaced, other_replaced, nullptr);
}
} // namespace
void ShowSingletonTab(Profile* profile, const GURL& url) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
if (!crosapi::browser_util::IsAshWebBrowserEnabled()) {
ash::TryOpenUrl(url, WindowOpenDisposition::SINGLETON_TAB,
NavigateParams::RESPECT,
ash::ChromeSchemeSemantics::kLacros);
return;
}
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
chrome::ScopedTabbedBrowserDisplayer displayer(profile);
NavigateParams params(
GetSingletonTabNavigateParams(displayer.browser(), url));
Navigate(¶ms);
}
void ShowSingletonTab(Browser* browser, const GURL& url) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
if (!crosapi::browser_util::IsAshWebBrowserEnabled()) {
ash::TryOpenUrl(url, WindowOpenDisposition::SINGLETON_TAB,
NavigateParams::RESPECT,
ash::ChromeSchemeSemantics::kLacros);
return;
}
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
NavigateParams params(GetSingletonTabNavigateParams(browser, url));
Navigate(¶ms);
}
void ShowSingletonTabOverwritingNTP(
Profile* profile,
const GURL& url,
NavigateParams::PathBehavior path_behavior) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
if (!crosapi::browser_util::IsAshWebBrowserEnabled()) {
ash::TryOpenUrl(url, WindowOpenDisposition::SINGLETON_TAB, path_behavior,
ash::ChromeSchemeSemantics::kLacros);
return;
}
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
chrome::ScopedTabbedBrowserDisplayer displayer(profile);
NavigateParams params(
GetSingletonTabNavigateParams(displayer.browser(), url));
params.path_behavior = path_behavior;
ShowSingletonTabOverwritingNTP(¶ms);
}
void ShowSingletonTabOverwritingNTP(
Browser* browser,
const GURL& url,
NavigateParams::PathBehavior path_behavior) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
if (!crosapi::browser_util::IsAshWebBrowserEnabled()) {
ash::TryOpenUrl(url, WindowOpenDisposition::SINGLETON_TAB, path_behavior,
ash::ChromeSchemeSemantics::kLacros);
return;
}
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
NavigateParams params(GetSingletonTabNavigateParams(browser, url));
params.path_behavior = path_behavior;
ShowSingletonTabOverwritingNTP(¶ms);
}
void ShowSingletonTabOverwritingNTP(NavigateParams* params) {
DCHECK_EQ(params->disposition, WindowOpenDisposition::SINGLETON_TAB);
#if BUILDFLAG(IS_CHROMEOS_ASH)
// TODO(neis): Make this a CHECK after confirming that it doesn't happen in
// the wild.
if (!crosapi::browser_util::IsAshWebBrowserEnabled() &&
!ash::switches::IsAshDebugBrowserEnabled()) {
base::debug::DumpWithoutCrashing();
LOG(ERROR) << "Unexpected SINGLETON_TAB navigation in Ash";
}
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
content::WebContents* contents =
params->browser->tab_strip_model()->GetActiveWebContents();
if (contents) {
const GURL& contents_url = contents->GetVisibleURL();
if (contents_url == chrome::kChromeUINewTabURL ||
search::IsInstantNTP(contents) || contents_url == url::kAboutBlankURL) {
int tab_index = GetIndexOfExistingTab(params->browser, *params);
if (tab_index < 0) {
params->disposition = WindowOpenDisposition::CURRENT_TAB;
} else {
params->switch_to_singleton_tab =
params->browser->tab_strip_model()->GetWebContentsAt(tab_index);
}
}
}
Navigate(params);
}
NavigateParams GetSingletonTabNavigateParams(Browser* browser,
const GURL& url) {
NavigateParams params(browser, url, ui::PAGE_TRANSITION_AUTO_BOOKMARK);
params.disposition = WindowOpenDisposition::SINGLETON_TAB;
params.window_action = NavigateParams::SHOW_WINDOW;
params.user_gesture = true;
params.tabstrip_add_types |= AddTabTypes::ADD_INHERIT_OPENER;
return params;
}
// Returns the index of an existing singleton tab in |browser| matching
// the URL specified in |params|.
int GetIndexOfExistingTab(Browser* browser, const NavigateParams& params) {
if (params.disposition != WindowOpenDisposition::SINGLETON_TAB &&
params.disposition != WindowOpenDisposition::SWITCH_TO_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.
const bool target_is_view_source =
params.url.SchemeIs(content::kViewSourceScheme);
GURL rewritten_url(params.url);
content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
&rewritten_url, browser->profile());
ChromeAutocompleteProviderClient client(browser->profile());
// If there are several matches: prefer the active tab by starting there.
int start_index = std::max(0, browser->tab_strip_model()->active_index());
int tab_count = browser->tab_strip_model()->count();
for (int i = 0; i < tab_count; ++i) {
int tab_index = (start_index + i) % tab_count;
content::WebContents* tab =
browser->tab_strip_model()->GetWebContentsAt(tab_index);
GURL tab_url = tab->GetVisibleURL();
// RewriteURLIfNecessary removes the "view-source:" scheme which could lead
// to incorrect matching, so ensure that the target and the candidate are
// either both view-source:, or neither is.
if (tab_url.SchemeIs(content::kViewSourceScheme) != target_is_view_source) {
continue;
}
GURL rewritten_tab_url = tab_url;
content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
&rewritten_tab_url, browser->profile());
GURL::Replacements replacements;
replacements.ClearRef();
if (params.path_behavior == NavigateParams::IGNORE_AND_NAVIGATE) {
replacements.ClearPath();
replacements.ClearQuery();
}
if (CompareURLsWithReplacements(tab_url, params.url, replacements,
&client) ||
CompareURLsWithReplacements(rewritten_tab_url, rewritten_url,
replacements, &client)) {
return tab_index;
}
}
return -1;
}
std::pair<Browser*, int> GetIndexAndBrowserOfExistingTab(
Profile* profile,
const NavigateParams& params) {
for (Browser* browser : BrowserList::GetInstance()->OrderedByActivation()) {
// When tab switching, only look at same profile and anonymity level.
if (profile == browser->profile() && !browser->is_delete_scheduled()) {
int index = GetIndexOfExistingTab(browser, params);
if (index >= 0)
return {browser, index};
}
}
return {nullptr, -1};
}
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