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363 lines
16 KiB
Plaintext
363 lines
16 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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interface nsIWebProgress;
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interface nsIRequest;
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interface nsIURI;
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/**
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* The nsIWebProgressListener interface is implemented by clients wishing to
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* listen in on the progress associated with the loading of asynchronous
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* requests in the context of a nsIWebProgress instance as well as any child
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* nsIWebProgress instances. nsIWebProgress.idl describes the parent-child
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* relationship of nsIWebProgress instances.
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*/
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[scriptable, uuid(a0cda7e4-c6ca-11e0-b6a5-001320257da5)]
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interface nsIWebProgressListener : nsISupports
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{
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/**
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* State Transition Flags
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*
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* These flags indicate the various states that requests may transition
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* through as they are being loaded. These flags are mutually exclusive.
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*
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* For any given request, onStateChange is called once with the STATE_START
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* flag, zero or more times with the STATE_TRANSFERRING flag or once with the
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* STATE_REDIRECTING flag, and then finally once with the STATE_STOP flag.
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* NOTE: For document requests, a second STATE_STOP is generated (see the
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* description of STATE_IS_WINDOW for more details).
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*
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* STATE_START
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* This flag indicates the start of a request. This flag is set when a
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* request is initiated. The request is complete when onStateChange is
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* called for the same request with the STATE_STOP flag set.
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*
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* STATE_REDIRECTING
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* This flag indicates that a request is being redirected. The request
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* passed to onStateChange is the request that is being redirected. When a
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* redirect occurs, a new request is generated automatically to process the
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* new request. Expect a corresponding STATE_START event for the new
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* request, and a STATE_STOP for the redirected request.
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*
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* STATE_TRANSFERRING
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* This flag indicates that data for a request is being transferred to an
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* end consumer. This flag indicates that the request has been targeted,
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* and that the user may start seeing content corresponding to the request.
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*
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* STATE_NEGOTIATING
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* This flag is not used.
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*
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* STATE_STOP
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* This flag indicates the completion of a request. The aStatus parameter
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* to onStateChange indicates the final status of the request.
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*/
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const unsigned long STATE_START = 0x00000001;
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const unsigned long STATE_REDIRECTING = 0x00000002;
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const unsigned long STATE_TRANSFERRING = 0x00000004;
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const unsigned long STATE_NEGOTIATING = 0x00000008;
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const unsigned long STATE_STOP = 0x00000010;
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/**
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* State Type Flags
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*
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* These flags further describe the entity for which the state transition is
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* occuring. These flags are NOT mutually exclusive (i.e., an onStateChange
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* event may indicate some combination of these flags).
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*
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* STATE_IS_REQUEST
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* This flag indicates that the state transition is for a request, which
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* includes but is not limited to document requests. (See below for a
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* description of document requests.) Other types of requests, such as
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* requests for inline content (e.g., images and stylesheets) are
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* considered normal requests.
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*
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* STATE_IS_DOCUMENT
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* This flag indicates that the state transition is for a document request.
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* This flag is set in addition to STATE_IS_REQUEST. A document request
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* supports the nsIChannel interface and its loadFlags attribute includes
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* the nsIChannel::LOAD_DOCUMENT_URI flag.
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*
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* A document request does not complete until all requests associated with
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* the loading of its corresponding document have completed. This includes
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* other document requests (e.g., corresponding to HTML <iframe> elements).
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* The document corresponding to a document request is available via the
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* DOMWindow attribute of onStateChange's aWebProgress parameter.
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*
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* STATE_IS_NETWORK
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* This flag indicates that the state transition corresponds to the start
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* or stop of activity in the indicated nsIWebProgress instance. This flag
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* is accompanied by either STATE_START or STATE_STOP, and it may be
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* combined with other State Type Flags.
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*
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* Unlike STATE_IS_WINDOW, this flag is only set when activity within the
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* nsIWebProgress instance being observed starts or stops. If activity
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* only occurs in a child nsIWebProgress instance, then this flag will be
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* set to indicate the start and stop of that activity.
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*
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* For example, in the case of navigation within a single frame of a HTML
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* frameset, a nsIWebProgressListener instance attached to the
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* nsIWebProgress of the frameset window will receive onStateChange calls
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* with the STATE_IS_NETWORK flag set to indicate the start and stop of
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* said navigation. In other words, an observer of an outer window can
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* determine when activity, that may be constrained to a child window or
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* set of child windows, starts and stops.
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*
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* STATE_IS_WINDOW
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* This flag indicates that the state transition corresponds to the start
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* or stop of activity in the indicated nsIWebProgress instance. This flag
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* is accompanied by either STATE_START or STATE_STOP, and it may be
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* combined with other State Type Flags.
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*
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* This flag is similar to STATE_IS_DOCUMENT. However, when a document
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* request completes, two onStateChange calls with STATE_STOP are
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* generated. The document request is passed as aRequest to both calls.
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* The first has STATE_IS_REQUEST and STATE_IS_DOCUMENT set, and the second
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* has the STATE_IS_WINDOW flag set (and possibly the STATE_IS_NETWORK flag
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* set as well -- see above for a description of when the STATE_IS_NETWORK
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* flag may be set). This second STATE_STOP event may be useful as a way
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* to partition the work that occurs when a document request completes.
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*/
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const unsigned long STATE_IS_REQUEST = 0x00010000;
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const unsigned long STATE_IS_DOCUMENT = 0x00020000;
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const unsigned long STATE_IS_NETWORK = 0x00040000;
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const unsigned long STATE_IS_WINDOW = 0x00080000;
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/**
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* State Modifier Flags
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*
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* These flags further describe the transition which is occuring. These
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* flags are NOT mutually exclusive (i.e., an onStateChange event may
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* indicate some combination of these flags).
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*
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* STATE_RESTORING
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* This flag indicates that the state transition corresponds to the start
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* or stop of activity for restoring a previously-rendered presentation.
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* As such, there is no actual network activity associated with this
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* request, and any modifications made to the document or presentation
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* when it was originally loaded will still be present.
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*/
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const unsigned long STATE_RESTORING = 0x01000000;
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/**
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* State Security Flags
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*
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* These flags describe the security state reported by a call to the
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* onSecurityChange method. These flags are mutually exclusive.
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*
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* STATE_IS_INSECURE
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* This flag indicates that the data corresponding to the request
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* was received over an insecure channel.
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*
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* STATE_IS_BROKEN
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* This flag indicates an unknown security state. This may mean that the
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* request is being loaded as part of a page in which some content was
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* received over an insecure channel.
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*
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* STATE_IS_SECURE
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* This flag indicates that the data corresponding to the request was
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* received over a secure channel. The degree of security is expressed by
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* STATE_SECURE_HIGH, STATE_SECURE_MED, or STATE_SECURE_LOW.
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*/
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const unsigned long STATE_IS_INSECURE = 0x00000004;
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const unsigned long STATE_IS_BROKEN = 0x00000001;
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const unsigned long STATE_IS_SECURE = 0x00000002;
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/**
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* Security Strength Flags
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*
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* These flags describe the security strength and accompany STATE_IS_SECURE
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* in a call to the onSecurityChange method. These flags are mutually
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* exclusive.
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*
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* These flags are not meant to provide a precise description of data
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* transfer security. These are instead intended as a rough indicator that
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* may be used to, for example, color code a security indicator or otherwise
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* provide basic data transfer security feedback to the user.
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*
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* STATE_SECURE_HIGH
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* This flag indicates a high degree of security.
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*
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* STATE_SECURE_MED
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* This flag indicates a medium degree of security.
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*
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* STATE_SECURE_LOW
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* This flag indicates a low degree of security.
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*/
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const unsigned long STATE_SECURE_HIGH = 0x00040000;
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const unsigned long STATE_SECURE_MED = 0x00010000;
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const unsigned long STATE_SECURE_LOW = 0x00020000;
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/**
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* State bits for EV == Extended Validation == High Assurance
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*
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* These flags describe the level of identity verification
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* in a call to the onSecurityChange method.
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*
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* STATE_IDENTITY_EV_TOPLEVEL
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* The topmost document uses an EV cert.
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* NOTE: Available since Gecko 1.9
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*/
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const unsigned long STATE_IDENTITY_EV_TOPLEVEL = 0x00100000;
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/**
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* Notification indicating the state has changed for one of the requests
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* associated with aWebProgress.
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*
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* @param aWebProgress
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* The nsIWebProgress instance that fired the notification
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* @param aRequest
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* The nsIRequest that has changed state.
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* @param aStateFlags
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* Flags indicating the new state. This value is a combination of one
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* of the State Transition Flags and one or more of the State Type
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* Flags defined above. Any undefined bits are reserved for future
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* use.
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* @param aStatus
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* Error status code associated with the state change. This parameter
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* should be ignored unless aStateFlags includes the STATE_STOP bit.
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* The status code indicates success or failure of the request
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* associated with the state change. NOTE: aStatus may be a success
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* code even for server generated errors, such as the HTTP 404 error.
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* In such cases, the request itself should be queried for extended
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* error information (e.g., for HTTP requests see nsIHttpChannel).
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*/
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void onStateChange(in nsIWebProgress aWebProgress,
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in nsIRequest aRequest,
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in unsigned long aStateFlags,
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in nsresult aStatus);
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/**
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* Notification that the progress has changed for one of the requests
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* associated with aWebProgress. Progress totals are reset to zero when all
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* requests in aWebProgress complete (corresponding to onStateChange being
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* called with aStateFlags including the STATE_STOP and STATE_IS_WINDOW
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* flags).
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*
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* @param aWebProgress
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* The nsIWebProgress instance that fired the notification.
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* @param aRequest
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* The nsIRequest that has new progress.
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* @param aCurSelfProgress
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* The current progress for aRequest.
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* @param aMaxSelfProgress
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* The maximum progress for aRequest.
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* @param aCurTotalProgress
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* The current progress for all requests associated with aWebProgress.
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* @param aMaxTotalProgress
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* The total progress for all requests associated with aWebProgress.
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*
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* NOTE: If any progress value is unknown, or if its value would exceed the
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* maximum value of type long, then its value is replaced with -1.
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*
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* NOTE: If the object also implements nsIWebProgressListener2 and the caller
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* knows about that interface, this function will not be called. Instead,
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* nsIWebProgressListener2::onProgressChange64 will be called.
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*/
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void onProgressChange(in nsIWebProgress aWebProgress,
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in nsIRequest aRequest,
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in long aCurSelfProgress,
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in long aMaxSelfProgress,
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in long aCurTotalProgress,
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in long aMaxTotalProgress);
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/**
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* Flags for onLocationChange
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*
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* LOCATION_CHANGE_SAME_DOCUMENT
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* This flag is on when |aWebProgress| did not load a new document.
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* For example, the location change is due to an anchor scroll or a
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* pushState/popState/replaceState.
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*
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* LOCATION_CHANGE_ERROR_PAGE
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* This flag is on when |aWebProgress| redirected from the requested
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* contents to an internal page to show error status, such as
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* <about:neterror>, <about:certerror> and so on.
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*
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* Generally speaking, |aURI| and |aRequest| are the original data. DOM
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* |window.location.href| is also the original location, while
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* |document.documentURI| is the redirected location. Sometimes |aURI| is
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* <about:blank> and |aRequest| is null when the original data does not
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+ remain.
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*
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* |aWebProgress| does NOT set this flag when it did not try to load a new
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* document. In this case, it should set LOCATION_CHANGE_SAME_DOCUMENT.
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*/
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const unsigned long LOCATION_CHANGE_SAME_DOCUMENT = 0x00000001;
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const unsigned long LOCATION_CHANGE_ERROR_PAGE = 0x00000002;
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/**
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* Called when the location of the window being watched changes. This is not
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* when a load is requested, but rather once it is verified that the load is
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* going to occur in the given window. For instance, a load that starts in a
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* window might send progress and status messages for the new site, but it
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* will not send the onLocationChange until we are sure that we are loading
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* this new page here.
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*
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* @param aWebProgress
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* The nsIWebProgress instance that fired the notification.
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* @param aRequest
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* The associated nsIRequest. This may be null in some cases.
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* @param aLocation
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* The URI of the location that is being loaded.
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* @param aFlags
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* This is a value which explains the situation or the reason why
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* the location has changed.
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*/
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void onLocationChange(in nsIWebProgress aWebProgress,
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in nsIRequest aRequest,
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in nsIURI aLocation,
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[optional] in unsigned long aFlags);
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/**
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* Notification that the status of a request has changed. The status message
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* is intended to be displayed to the user (e.g., in the status bar of the
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* browser).
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*
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* @param aWebProgress
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* The nsIWebProgress instance that fired the notification.
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* @param aRequest
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* The nsIRequest that has new status.
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* @param aStatus
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* This value is not an error code. Instead, it is a numeric value
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* that indicates the current status of the request. This interface
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* does not define the set of possible status codes. NOTE: Some
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* status values are defined by nsITransport and nsISocketTransport.
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* @param aMessage
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* Localized text corresponding to aStatus.
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*/
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void onStatusChange(in nsIWebProgress aWebProgress,
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in nsIRequest aRequest,
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in nsresult aStatus,
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in wstring aMessage);
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/**
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* Notification called for security progress. This method will be called on
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* security transitions (eg HTTP -> HTTPS, HTTPS -> HTTP, FOO -> HTTPS) and
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* after document load completion. It might also be called if an error
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* occurs during network loading.
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*
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* @param aWebProgress
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* The nsIWebProgress instance that fired the notification.
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* @param aRequest
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* The nsIRequest that has new security state.
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* @param aState
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* A value composed of the Security State Flags and the Security
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* Strength Flags listed above. Any undefined bits are reserved for
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* future use.
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*
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* NOTE: These notifications will only occur if a security package is
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* installed.
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*/
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void onSecurityChange(in nsIWebProgress aWebProgress,
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in nsIRequest aRequest,
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in unsigned long aState);
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};
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