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/* 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/. */
"use strict";
/**
* A WebProgressListener that listens for file loads.
*
* @constructor
* @param object window
* The window for which we need to track file loads.
* @param object owner
* The listener owner which needs to implement:
* - onFileActivity(aFileURI)
*/
function ConsoleFileActivityListener(window, owner) {
this.window = window;
this.owner = owner;
}
exports.ConsoleFileActivityListener = ConsoleFileActivityListener;
ConsoleFileActivityListener.prototype = {
/**
* Tells if the console progress listener is initialized or not.
* @private
* @type boolean
*/
_initialized: false,
_webProgress: null,
QueryInterface: ChromeUtils.generateQI([
"nsIWebProgressListener",
"nsISupportsWeakReference",
]),
/**
* Initialize the ConsoleFileActivityListener.
* @private
*/
_init() {
if (this._initialized) {
return;
}
this._webProgress = this.window.docShell.QueryInterface(Ci.nsIWebProgress);
this._webProgress.addProgressListener(
this,
Ci.nsIWebProgress.NOTIFY_STATE_ALL
);
this._initialized = true;
},
/**
* Start a monitor/tracker related to the current nsIWebProgressListener
* instance.
*/
startMonitor() {
this._init();
},
/**
* Stop monitoring.
*/
stopMonitor() {
this.destroy();
},
onStateChange(progress, request, state, status) {
if (!this.owner) {
return;
}
this._checkFileActivity(progress, request, state, status);
},
/**
* Check if there is any file load, given the arguments of
* nsIWebProgressListener.onStateChange. If the state change tells that a file
* URI has been loaded, then the remote Web Console instance is notified.
* @private
*/
_checkFileActivity(progress, request, state, status) {
if (!(state & Ci.nsIWebProgressListener.STATE_START)) {
return;
}
let uri = null;
if (request instanceof Ci.imgIRequest) {
const imgIRequest = request.QueryInterface(Ci.imgIRequest);
uri = imgIRequest.URI;
} else if (request instanceof Ci.nsIChannel) {
const nsIChannel = request.QueryInterface(Ci.nsIChannel);
uri = nsIChannel.URI;
}
if (!uri || (!uri.schemeIs("file") && !uri.schemeIs("ftp"))) {
return;
}
this.owner.onFileActivity(uri.spec);
},
/**
* Destroy the ConsoleFileActivityListener.
*/
destroy() {
if (!this._initialized) {
return;
}
this._initialized = false;
try {
this._webProgress.removeProgressListener(this);
} catch (ex) {
// This can throw during browser shutdown.
}
this._webProgress = null;
this.window = null;
this.owner = null;
},
};
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