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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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
+#define CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
+
+// This file describes various types used to describe and filter notifications
+// that pass through the NotificationService.
+//
+// Only notifications that are fired from the content module should be here. We
+// should never have a notification that is fired by the embedder and listened
+// to by content.
+namespace content {
+
+enum NotificationType {
+  NOTIFICATION_CONTENT_START = 0,
+
+  // General -----------------------------------------------------------------
+
+  // Special signal value to represent an interest in all notifications.
+  // Not valid when posting a notification.
+  NOTIFICATION_ALL = NOTIFICATION_CONTENT_START,
+
+  // NavigationController ----------------------------------------------------
+
+  // A new pending navigation has been created. Pending entries are created
+  // when the user requests the navigation. We don't know if it will actually
+  // happen until it does (at this point, it will be "committed." Note that
+  // renderer- initiated navigations such as link clicks will never be
+  // pending.
+  //
+  // This notification is called after the pending entry is created, but
+  // before we actually try to navigate. The source will be the
+  // NavigationController that owns the pending entry, and the details
+  // will be a NavigationEntry.
+  NOTIFICATION_NAV_ENTRY_PENDING,
+
+  // A new non-pending navigation entry has been created. This will
+  // correspond to one NavigationController entry being created (in the case
+  // of new navigations) or renavigated to (for back/forward navigations).
+  //
+  // The source will be the navigation controller doing the commit. The
+  // details will be NavigationController::LoadCommittedDetails.
+  NOTIFICATION_NAV_ENTRY_COMMITTED,
+
+  // Indicates that the NavigationController given in the Source has
+  // decreased its back/forward list count by removing entries from either
+  // the front or back of its list. This is usually the result of going back
+  // and then doing a new navigation, meaning all the "forward" items are
+  // deleted.
+  //
+  // This normally happens as a result of a new navigation. It will be
+  // followed by a NAV_ENTRY_COMMITTED message for the new page that
+  // caused the pruning. It could also be a result of removing an item from
+  // the list to fix up after interstitials.
+  //
+  // The details are NavigationController::PrunedDetails.
+  NOTIFICATION_NAV_LIST_PRUNED,
+
+  // Indicates that a NavigationEntry has changed. The source will be the
+  // NavigationController that owns the NavigationEntry. The details will be
+  // a NavigationController::EntryChangedDetails struct.
+  //
+  // This will NOT be sent on navigation, interested parties should also
+  // listen for NAV_ENTRY_COMMITTED to handle that case. This will be
+  // sent when the entry is updated outside of navigation (like when a new
+  // title comes).
+  NOTIFICATION_NAV_ENTRY_CHANGED,
+
+  // Other load-related (not from NavigationController) ----------------------
+
+  // Corresponds to ViewHostMsg_DocumentOnLoadCompletedInMainFrame. The source
+  // is the WebContents and the details the page_id.
+  NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
+
+  // A content load is starting.  The source will be a
+  // Source<NavigationController> corresponding to the tab in which the load
+  // is occurring.  No details are expected for this notification.
+  NOTIFICATION_LOAD_START,
+
+  // A content load has stopped. The source will be a
+  // Source<NavigationController> corresponding to the tab in which the load
+  // is occurring.  Details in the form of a LoadNotificationDetails object
+  // are optional.
+  NOTIFICATION_LOAD_STOP,
+
+  // Content was loaded from an in-memory cache.  The source will be a
+  // Source<NavigationController> corresponding to the tab in which the load
+  // occurred.  Details in the form of a LoadFromMemoryCacheDetails object
+  // are provided.
+  NOTIFICATION_LOAD_FROM_MEMORY_CACHE,
+
+  // A response has been received for a resource request.  The source will be
+  // a Source<WebContents> corresponding to the tab in which the request was
+  // issued.  Details in the form of a ResourceRequestDetails object are
+  // provided.
+  NOTIFICATION_RESOURCE_RESPONSE_STARTED,
+
+  // A redirect was received while requesting a resource.  The source will be
+  // a Source<WebContents> corresponding to the tab in which the request was
+  // issued.  Details in the form of a ResourceRedirectDetails are provided.
+  NOTIFICATION_RESOURCE_RECEIVED_REDIRECT,
+
+  // WebContents ---------------------------------------------------------------
+
+  // This notification is sent when a render view host has connected to a
+  // renderer process. The source is a Source<WebContents> with a pointer to
+  // the WebContents.  A WEB_CONTENTS_DISCONNECTED notification is
+  // guaranteed before the source pointer becomes junk.  No details are
+  // expected.
+  NOTIFICATION_WEB_CONTENTS_CONNECTED,
+
+  // This notification is sent when a WebContents swaps its render view host
+  // with another one, possibly changing processes. The source is a
+  // Source<WebContents> with a pointer to the WebContents.  A
+  // NOTIFICATION_WEB_CONTENTS_DISCONNECTED notification is guaranteed before
+  // the source pointer becomes junk.  Details are the RenderViewHost that
+  // has been replaced, or NULL if the old RVH was shut down.
+  NOTIFICATION_WEB_CONTENTS_SWAPPED,
+
+  // This message is sent after a WebContents is disconnected from the
+  // renderer process.  The source is a Source<WebContents> with a pointer to
+  // the WebContents (the pointer is usable).  No details are expected.
+  NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
+
+  // This notification is sent after WebContents' title is updated. The source
+  // is a Source<WebContents> with a pointer to the WebContents. The details
+  // is a std::pair<NavigationEntry*, bool> that contains more information.
+  NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
+
+  // Indicates a WebContents has been hidden or restored.  The source is
+  // a Source<WebContents>. The details is a bool set to true if the new
+  // state is visible.
+  NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED,
+
+  // This notification is sent when a WebContents is being destroyed. Any
+  // object holding a reference to a WebContents can listen to that
+  // notification to properly reset the reference. The source is a
+  // Source<WebContents>.
+  NOTIFICATION_WEB_CONTENTS_DESTROYED,
+
+  // A RenderViewHost was created for a WebContents. The source is the
+  // associated WebContents, and the details is the RenderViewHost
+  // pointer.
+  NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
+
+  // Indicates that a RenderProcessHost was created and its handle is now
+  // available. The source will be the RenderProcessHost that corresponds to
+  // the process.
+  NOTIFICATION_RENDERER_PROCESS_CREATED,
+
+  // Indicates that a RenderProcessHost is destructing. The source will be the
+  // RenderProcessHost that corresponds to the process.
+  NOTIFICATION_RENDERER_PROCESS_TERMINATED,
+
+  // Indicates that a render process is starting to exit, such that it should
+  // not be used for future navigations.  The source will be the
+  // RenderProcessHost that corresponds to the process.
+  NOTIFICATION_RENDERER_PROCESS_CLOSING,
+
+  // Indicates that a render process was closed (meaning it exited, but the
+  // RenderProcessHost might be reused).  The source will be the corresponding
+  // RenderProcessHost.  The details will be a RendererClosedDetails struct.
+  // This may get sent along with RENDERER_PROCESS_TERMINATED.
+  NOTIFICATION_RENDERER_PROCESS_CLOSED,
+
+  // Indicates that a render process has become unresponsive for a period of
+  // time. The source will be the RenderWidgetHost that corresponds to the
+  // hung view, and no details are expected.
+  NOTIFICATION_RENDERER_PROCESS_HANG,
+
+  // This is sent to notify that the RenderViewHost displayed in a WebContents
+  // has changed.  Source is the NavigationController for which the change
+  // happened, details is a
+  // std::pair::<old RenderViewHost, new RenderViewHost>).
+  NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
+
+  // This is sent when a RenderWidgetHost is being destroyed. The source is
+  // the RenderWidgetHost, the details are not used.
+  NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
+
+  // Sent after the backing store has been updated but before the widget has
+  // painted. The source is the RenderWidgetHost, the details are not used.
+  NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
+
+  // This notifies the observer that a PaintAtSizeACK was received. The source
+  // is the RenderWidgetHost, the details are an instance of
+  // std::pair<int, gfx::Size>.
+  NOTIFICATION_RENDER_WIDGET_HOST_DID_RECEIVE_PAINT_AT_SIZE_ACK,
+
+  // This notifies the observer that a HandleInputEventACK was received. The
+  // source is the RenderWidgetHost, the details are the type of event
+  // received.
+  // Note: The RenderWidgetHost may be deallocated at this point.
+  // Used only in testing.
+  NOTIFICATION_RENDER_WIDGET_HOST_DID_RECEIVE_INPUT_EVENT_ACK,
+
+  // Sent from RenderViewHost::ClosePage.  The hosted RenderView has
+  // processed the onbeforeunload handler and is about to be sent a
+  // ViewMsg_ClosePage message to complete the tear-down process.  The source
+  // is the RenderViewHost sending the message, and no details are provided.
+  // Note:  This message is not sent in response to RenderView closure
+  // initiated by window.close().
+  NOTIFICATION_RENDER_VIEW_HOST_WILL_CLOSE_RENDER_VIEW,
+
+  // This notifies the observer that the drag operation ack in a drag and
+  // drop operation was received. The source is the RenderViewHost.
+  // Note: Used only in testing.
+  NOTIFICATION_RENDER_VIEW_HOST_DID_RECEIVE_DRAG_TARGET_DROP_ACK,
+
+  // Indicates a RenderWidgetHost has been hidden or restored. The source is
+  // the RWH whose visibility changed, the details is a bool set to true if
+  // the new state is "visible."
+  NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
+
+  // The focused element inside a page has changed.  The source is the
+  // RenderViewHost. The details is a Details<const bool> that indicates whether
+  // or not an editable node was focused.
+  NOTIFICATION_FOCUS_CHANGED_IN_PAGE,
+
+  // Notification from WebContents that we have received a response from the
+  // renderer in response to a dom automation controller action. The source is
+  // the RenderViewHost, and the details is a DomOperationNotificationDetails.
+  NOTIFICATION_DOM_OPERATION_RESPONSE,
+
+  // Custom notifications used by the embedder should start from here.
+  NOTIFICATION_CONTENT_END,
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_