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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/. */
/*
* This module is imported by code that uses the "download.xml" binding, and
* provides prototypes for objects that handle input and display information.
*/
"use strict";
this.EXPORTED_SYMBOLS = [
"DownloadsViewUI",
];
const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "DownloadUtils",
"resource://gre/modules/DownloadUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "DownloadsCommon",
"resource:///modules/DownloadsCommon.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "OS",
"resource://gre/modules/osfile.jsm");
this.DownloadsViewUI = {};
/**
* A download element shell is responsible for handling the commands and the
* displayed data for a single element that uses the "download.xml" binding.
*
* The information to display is obtained through the associated Download object
* from the JavaScript API for downloads, and commands are executed using a
* combination of Download methods and DownloadsCommon.jsm helper functions.
*
* Specialized versions of this shell must be defined, and they are required to
* implement the "download" property or getter. Currently these objects are the
* HistoryDownloadElementShell and the DownloadsViewItem for the panel. The
* history view may use a HistoryDownload object in place of a Download object.
*/
this.DownloadsViewUI.DownloadElementShell = function () {}
this.DownloadsViewUI.DownloadElementShell.prototype = {
/**
* The richlistitem for the download, initialized by the derived object.
*/
element: null,
/**
* URI string for the file type icon displayed in the download element.
*/
get image() {
if (!this.download.target.path) {
// Old history downloads may not have a target path.
return "moz-icon://.unknown?size=32";
}
// When a download that was previously in progress finishes successfully, it
// means that the target file now exists and we can extract its specific
// icon, for example from a Windows executable. To ensure that the icon is
// reloaded, however, we must change the URI used by the XUL image element,
// for example by adding a query parameter. This only works if we add one of
// the parameters explicitly supported by the nsIMozIconURI interface.
return "moz-icon://" + this.download.target.path + "?size=32" +
(this.download.succeeded ? "&state=normal" : "");
},
/**
* The user-facing label for the download. This is normally the leaf name of
* the download target file. In case this is a very old history download for
* which the target file is unknown, the download source URI is displayed.
*/
get displayName() {
if (!this.download.target.path) {
return this.download.source.url;
}
return OS.Path.basename(this.download.target.path);
},
/**
* The progress element for the download, or undefined in case the XBL binding
* has not been applied yet.
*/
get _progressElement() {
if (!this.__progressElement) {
// If the element is not available now, we will try again the next time.
this.__progressElement =
this.element.ownerDocument.getAnonymousElementByAttribute(
this.element, "anonid",
"progressmeter");
}
return this.__progressElement;
},
/**
* Processes a major state change in the user interface, then proceeds with
* the normal progress update. This function is not called for every progress
* update in order to improve performance.
*/
_updateState() {
this.element.setAttribute("displayName", this.displayName);
this.element.setAttribute("image", this.image);
this.element.setAttribute("state",
DownloadsCommon.stateOfDownload(this.download));
// Since state changed, reset the time left estimation.
this.lastEstimatedSecondsLeft = Infinity;
this._updateProgress();
},
/**
* Updates the elements that change regularly for in-progress downloads,
* namely the progress bar and the status line.
*/
_updateProgress() {
if (this.download.succeeded) {
// We only need to add or remove this attribute for succeeded downloads.
if (this.download.target.exists) {
this.element.setAttribute("exists", "true");
} else {
this.element.removeAttribute("exists");
}
}
// The progress bar is only displayed for in-progress downloads.
if (this.download.hasProgress) {
this.element.setAttribute("progressmode", "normal");
this.element.setAttribute("progress", this.download.progress);
} else {
this.element.setAttribute("progressmode", "undetermined");
}
// Dispatch the ValueChange event for accessibility, if possible.
if (this._progressElement) {
let event = this.element.ownerDocument.createEvent("Events");
event.initEvent("ValueChange", true, true);
this._progressElement.dispatchEvent(event);
}
let status = this.statusTextAndTip;
this.element.setAttribute("status", status.text);
this.element.setAttribute("statusTip", status.tip);
},
lastEstimatedSecondsLeft: Infinity,
/**
* Returns the text for the status line and the associated tooltip. These are
* returned by a single property because they are computed together. The
* result may be overridden by derived objects.
*/
get statusTextAndTip() this.rawStatusTextAndTip,
/**
* Derived objects may call this to get the status text.
*/
get rawStatusTextAndTip() {
const nsIDM = Ci.nsIDownloadManager;
let s = DownloadsCommon.strings;
let text = "";
let tip = "";
if (!this.download.stopped) {
let totalBytes = this.download.hasProgress ? this.download.totalBytes
: -1;
// By default, extended status information including the individual
// download rate is displayed in the tooltip. The history view overrides
// the getter and displays the datails in the main area instead.
[text] = DownloadUtils.getDownloadStatusNoRate(
this.download.currentBytes,
totalBytes,
this.download.speed,
this.lastEstimatedSecondsLeft);
let newEstimatedSecondsLeft;
[tip, newEstimatedSecondsLeft] = DownloadUtils.getDownloadStatus(
this.download.currentBytes,
totalBytes,
this.download.speed,
this.lastEstimatedSecondsLeft);
this.lastEstimatedSecondsLeft = newEstimatedSecondsLeft;
} else if (this.download.canceled && this.download.hasPartialData) {
let totalBytes = this.download.hasProgress ? this.download.totalBytes
: -1;
let transfer = DownloadUtils.getTransferTotal(this.download.currentBytes,
totalBytes);
// We use the same XUL label to display both the state and the amount
// transferred, for example "Paused - 1.1 MB".
text = s.statusSeparatorBeforeNumber(s.statePaused, transfer);
} else if (!this.download.succeeded && !this.download.canceled &&
!this.download.error) {
text = s.stateStarting;
} else {
let stateLabel;
if (this.download.succeeded) {
// For completed downloads, show the file size (e.g. "1.5 MB").
if (this.download.target.size !== undefined) {
let [size, unit] =
DownloadUtils.convertByteUnits(this.download.target.size);
stateLabel = s.sizeWithUnits(size, unit);
} else {
// History downloads may not have a size defined.
stateLabel = s.sizeUnknown;
}
} else if (this.download.canceled) {
stateLabel = s.stateCanceled;
} else if (this.download.error.becauseBlockedByParentalControls) {
stateLabel = s.stateBlockedParentalControls;
} else if (this.download.error.becauseBlockedByReputationCheck) {
stateLabel = s.stateDirty;
} else {
stateLabel = s.stateFailed;
}
let referrer = this.download.source.referrer || this.download.source.url;
let [displayHost, fullHost] = DownloadUtils.getURIHost(referrer);
let date = new Date(this.download.endTime);
let [displayDate, fullDate] = DownloadUtils.getReadableDates(date);
let firstPart = s.statusSeparator(stateLabel, displayHost);
text = s.statusSeparator(firstPart, displayDate);
tip = s.statusSeparator(fullHost, fullDate);
}
return { text, tip: tip || text };
},
};