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+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+interface mozIDOMWindowProxy;
+interface nsIWebProgressListener;
+
+/**
+ * The nsIWebProgress interface is used to add or remove nsIWebProgressListener
+ * instances to observe the loading of asynchronous requests (usually in the
+ * context of a DOM window).
+ *
+ * nsIWebProgress instances may be arranged in a parent-child configuration,
+ * corresponding to the parent-child configuration of their respective DOM
+ * windows. However, in some cases a nsIWebProgress instance may not have an
+ * associated DOM window. The parent-child relationship of nsIWebProgress
+ * instances is not made explicit by this interface, but the relationship may
+ * exist in some implementations.
+ *
+ * A nsIWebProgressListener instance receives notifications for the
+ * nsIWebProgress instance to which it added itself, and it may also receive
+ * notifications from any nsIWebProgress instances that are children of that
+ * nsIWebProgress instance.
+ */
+[scriptable, uuid(c4d64640-b332-4db6-a2a5-e08566000dc9)]
+interface nsIWebProgress : nsISupports
+{
+ /**
+ * The following flags may be combined to form the aNotifyMask parameter for
+ * the addProgressListener method. They limit the set of events that are
+ * delivered to an nsIWebProgressListener instance.
+ */
+
+ /**
+ * These flags indicate the state transistions to observe, corresponding to
+ * nsIWebProgressListener::onStateChange.
+ *
+ * NOTIFY_STATE_REQUEST
+ * Only receive the onStateChange event if the aStateFlags parameter
+ * includes nsIWebProgressListener::STATE_IS_REQUEST.
+ *
+ * NOTIFY_STATE_DOCUMENT
+ * Only receive the onStateChange event if the aStateFlags parameter
+ * includes nsIWebProgressListener::STATE_IS_DOCUMENT.
+ *
+ * NOTIFY_STATE_NETWORK
+ * Only receive the onStateChange event if the aStateFlags parameter
+ * includes nsIWebProgressListener::STATE_IS_NETWORK.
+ *
+ * NOTIFY_STATE_WINDOW
+ * Only receive the onStateChange event if the aStateFlags parameter
+ * includes nsIWebProgressListener::STATE_IS_WINDOW.
+ *
+ * NOTIFY_STATE_ALL
+ * Receive all onStateChange events.
+ */
+ const unsigned long NOTIFY_STATE_REQUEST = 0x00000001;
+ const unsigned long NOTIFY_STATE_DOCUMENT = 0x00000002;
+ const unsigned long NOTIFY_STATE_NETWORK = 0x00000004;
+ const unsigned long NOTIFY_STATE_WINDOW = 0x00000008;
+ const unsigned long NOTIFY_STATE_ALL = 0x0000000f;
+
+ /**
+ * These flags indicate the other events to observe, corresponding to the
+ * other four methods defined on nsIWebProgressListener.
+ *
+ * NOTIFY_PROGRESS
+ * Receive onProgressChange events.
+ *
+ * NOTIFY_STATUS
+ * Receive onStatusChange events.
+ *
+ * NOTIFY_SECURITY
+ * Receive onSecurityChange events.
+ *
+ * NOTIFY_LOCATION
+ * Receive onLocationChange events.
+ *
+ * NOTIFY_REFRESH
+ * Receive onRefreshAttempted events.
+ * This is defined on nsIWebProgressListener2.
+ */
+ const unsigned long NOTIFY_PROGRESS = 0x00000010;
+ const unsigned long NOTIFY_STATUS = 0x00000020;
+ const unsigned long NOTIFY_SECURITY = 0x00000040;
+ const unsigned long NOTIFY_LOCATION = 0x00000080;
+ const unsigned long NOTIFY_REFRESH = 0x00000100;
+
+ /**
+ * This flag enables all notifications.
+ */
+ const unsigned long NOTIFY_ALL = 0x000001ff;
+
+ /**
+ * Registers a listener to receive web progress events.
+ *
+ * @param aListener
+ * The listener interface to be called when a progress event occurs.
+ * This object must also implement nsISupportsWeakReference.
+ * @param aNotifyMask
+ * The types of notifications to receive.
+ *
+ * @throw NS_ERROR_INVALID_ARG
+ * Indicates that aListener was either null or that it does not
+ * support weak references.
+ * @throw NS_ERROR_FAILURE
+ * Indicates that aListener was already registered.
+ */
+ void addProgressListener(in nsIWebProgressListener aListener,
+ in unsigned long aNotifyMask);
+
+ /**
+ * Removes a previously registered listener of progress events.
+ *
+ * @param aListener
+ * The listener interface previously registered with a call to
+ * addProgressListener.
+ *
+ * @throw NS_ERROR_FAILURE
+ * Indicates that aListener was not registered.
+ */
+ void removeProgressListener(in nsIWebProgressListener aListener);
+
+ /**
+ * The DOM window associated with this nsIWebProgress instance.
+ *
+ * @throw NS_ERROR_FAILURE
+ * Indicates that there is no associated DOM window.
+ */
+ readonly attribute mozIDOMWindowProxy DOMWindow;
+ readonly attribute uint64_t DOMWindowID;
+
+ /**
+ * Indicates whether DOMWindow.top == DOMWindow.
+ */
+ readonly attribute boolean isTopLevel;
+
+ /**
+ * Indicates whether or not a document is currently being loaded
+ * in the context of this nsIWebProgress instance.
+ */
+ readonly attribute boolean isLoadingDocument;
+
+ /**
+ * Contains a load type as specified by the load* constants in
+ * nsIDocShellLoadInfo.idl.
+ */
+ readonly attribute unsigned long loadType;
+};