content/public/browser/navigation_type.h

   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 #ifndef CONTENT_PUBLIC_BROWSER_NAVIGATION_TYPE_H_
   6 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_TYPE_H_
   7
   8 namespace content {
   9
  10 // Indicates different types of navigations that can occur that we will handle
  11 // separately.
  12 enum NavigationType {
  13   // Unknown type.
  14   NAVIGATION_TYPE_UNKNOWN,
  15
  16   // A new page was navigated in the main frame.
  17   NAVIGATION_TYPE_NEW_PAGE,
  18
  19   // Renavigating to an existing navigation entry. The entry is guaranteed to
  20   // exist in the list, or else it would be a new page or IGNORE navigation.
  21   NAVIGATION_TYPE_EXISTING_PAGE,
  22
  23   // The same page has been reloaded as a result of the user requesting
  24   // navigation to that same page (like pressing Enter in the URL bar). This
  25   // is not the same as an in-page navigation because we'll actually have a
  26   // pending entry for the load, which is then meaningless.
  27   NAVIGATION_TYPE_SAME_PAGE,
  28
  29   // In page navigations are when the reference fragment changes. This will
  30   // be in the main frame only (we won't even get notified of in-page
  31   // subframe navigations). It may be for any page, not necessarily the last
  32   // committed one (for example, whey going back to a page with a ref).
  33   NAVIGATION_TYPE_IN_PAGE,
  34
  35   // A new subframe was manually navigated by the user. We will create a new
  36   // NavigationEntry so they can go back to the previous subframe content
  37   // using the back button.
  38   NAVIGATION_TYPE_NEW_SUBFRAME,
  39
  40   // A subframe in the page was automatically loaded or navigated to such that
  41   // a new navigation entry should not be created. There are two cases:
  42   //  1. Stuff like iframes containing ads that the page loads automatically.
  43   //     The user doesn't want to see these, so we just update the existing
  44   //     navigation entry.
  45   //  2. Going back/forward to previous subframe navigations. We don't create
  46   //     a new entry here either, just update the last committed entry.
  47   // These two cases are actually pretty different, they just happen to
  48   // require almost the same code to handle.
  49   NAVIGATION_TYPE_AUTO_SUBFRAME,
  50
  51   // Nothing happened. This happens when we get information about a page we
  52   // don't know anything about. It can also happen when an iframe in a popup
  53   // navigated to about:blank is navigated. Nothing needs to be done.
  54   NAVIGATION_TYPE_NAV_IGNORE,
  55 };
  56
  57 }  // namespace content
  58
  59 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_TYPE_H_