chrome/browser/browser_about_handler.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/browser_about_handler.h"
   6
   7 #include <string>
   8
   9 #include "base/bind.h"
  10 #include "base/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/strings/string_util.h"
  13 #include "chrome/browser/lifetime/application_lifetime.h"
  14 #include "chrome/browser/ui/browser_dialogs.h"
  15 #include "chrome/common/chrome_switches.h"
  16 #include "chrome/common/url_constants.h"
  17 #include "components/url_fixer/url_fixer.h"
  18
  19 bool WillHandleBrowserAboutURL(GURL* url,
  20                                content::BrowserContext* browser_context) {
  21   // TODO(msw): Eliminate "about:*" constants and literals from code and tests,
  22   //            then hopefully we can remove this forced fixup.
  23   *url = url_fixer::FixupURL(url->possibly_invalid_spec(), std::string());
  24
  25   // Check that about: URLs are fixed up to chrome: by url_fixer::FixupURL.
  26   DCHECK((*url == GURL(url::kAboutBlankURL)) ||
  27          !url->SchemeIs(url::kAboutScheme));
  28
  29   // Only handle chrome://foo/, url_fixer::FixupURL translates about:foo.
  30   if (!url->SchemeIs(content::kChromeUIScheme))
  31     return false;
  32
  33   std::string host(url->host());
  34   std::string path;
  35   // Replace about with chrome-urls.
  36   if (host == chrome::kChromeUIAboutHost)
  37     host = chrome::kChromeUIChromeURLsHost;
  38   // Replace cache with view-http-cache.
  39   if (host == chrome::kChromeUICacheHost) {
  40     host = content::kChromeUINetworkViewCacheHost;
  41   // Replace sync with sync-internals (for legacy reasons).
  42   } else if (host == chrome::kChromeUISyncHost) {
  43     host = chrome::kChromeUISyncInternalsHost;
  44   // Redirect chrome://extensions.
  45   } else if (host == chrome::kChromeUIExtensionsHost) {
  46     host = chrome::kChromeUIUberHost;
  47     path = chrome::kChromeUIExtensionsHost + url->path();
  48   // Redirect chrome://settings/extensions (legacy URL).
  49   } else if (host == chrome::kChromeUISettingsHost &&
  50       url->path() == std::string("/") + chrome::kExtensionsSubPage) {
  51     host = chrome::kChromeUIUberHost;
  52     path = chrome::kChromeUIExtensionsHost;
  53   // Redirect chrome://history.
  54   } else if (host == chrome::kChromeUIHistoryHost) {
  55 #if defined(OS_ANDROID)
  56     // On Android, redirect directly to chrome://history-frame since
  57     // uber page is unsupported.
  58     host = chrome::kChromeUIHistoryFrameHost;
  59 #else
  60     host = chrome::kChromeUIUberHost;
  61     path = chrome::kChromeUIHistoryHost + url->path();
  62 #endif
  63   // Redirect chrome://settings
  64   } else if (host == chrome::kChromeUISettingsHost) {
  65     if (::switches::AboutInSettingsEnabled()) {
  66       host = chrome::kChromeUISettingsFrameHost;
  67     } else {
  68       host = chrome::kChromeUIUberHost;
  69       path = chrome::kChromeUISettingsHost + url->path();
  70     }
  71   // Redirect chrome://help
  72   } else if (host == chrome::kChromeUIHelpHost) {
  73     if (::switches::AboutInSettingsEnabled()) {
  74       host = chrome::kChromeUISettingsFrameHost;
  75       if (url->path().empty() || url->path() == "/")
  76         path = chrome::kChromeUIHelpHost;
  77     } else {
  78       host = chrome::kChromeUIUberHost;
  79       path = chrome::kChromeUIHelpHost + url->path();
  80     }
  81   }
  82
  83   GURL::Replacements replacements;
  84   replacements.SetHostStr(host);
  85   if (!path.empty())
  86     replacements.SetPathStr(path);
  87   *url = url->ReplaceComponents(replacements);
  88
  89   // Having re-written the URL, make the chrome: handler process it.
  90   return false;
  91 }
  92
  93 bool HandleNonNavigationAboutURL(const GURL& url) {
  94   const std::string spec(url.spec());
  95
  96   if (LowerCaseEqualsASCII(spec, chrome::kChromeUIRestartURL)) {
  97     // Call AttemptRestart after chrome::Navigate() completes to avoid access of
  98     // gtk objects after they are destroyed by BrowserWindowGtk::Close().
  99     base::MessageLoop::current()->PostTask(FROM_HERE,
 100         base::Bind(&chrome::AttemptRestart));
 101     return true;
 102   } else if (LowerCaseEqualsASCII(spec, chrome::kChromeUIQuitURL)) {
 103     base::MessageLoop::current()->PostTask(FROM_HERE,
 104         base::Bind(&chrome::AttemptExit));
 105     return true;
 106   }
 107
 108   return false;
 109 }