michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * THE PLACES VIEW IMPLEMENTED IN THIS FILE HAS A VERY PARTICULAR USE CASE.
michael@0:  * IT IS HIGHLY RECOMMENDED NOT TO EXTEND IT FOR ANY OTHER USE CASES OR RELY
michael@0:  * ON IT AS AN API.
michael@0:  */
michael@0: 
michael@0: let Cu = Components.utils;
michael@0: let Ci = Components.interfaces;
michael@0: let Cc = Components.classes;
michael@0: 
michael@0: Cu.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: Cu.import("resource://gre/modules/Services.jsm");
michael@0: Cu.import("resource://gre/modules/NetUtil.jsm");
michael@0: Cu.import("resource://gre/modules/DownloadUtils.jsm");
michael@0: Cu.import("resource:///modules/DownloadsCommon.jsm");
michael@0: Cu.import("resource://gre/modules/PlacesUtils.jsm");
michael@0: Cu.import("resource://gre/modules/osfile.jsm");
michael@0: 
michael@0: XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
michael@0:                                   "resource://gre/modules/PrivateBrowsingUtils.jsm");
michael@0: XPCOMUtils.defineLazyModuleGetter(this, "RecentWindow",
michael@0:                                   "resource:///modules/RecentWindow.jsm");
michael@0: XPCOMUtils.defineLazyModuleGetter(this, "FileUtils",
michael@0:                                   "resource://gre/modules/FileUtils.jsm");
michael@0: 
michael@0: const nsIDM = Ci.nsIDownloadManager;
michael@0: 
michael@0: const DESTINATION_FILE_URI_ANNO  = "downloads/destinationFileURI";
michael@0: const DOWNLOAD_META_DATA_ANNO    = "downloads/metaData";
michael@0: 
michael@0: const DOWNLOAD_VIEW_SUPPORTED_COMMANDS =
michael@0:  ["cmd_delete", "cmd_copy", "cmd_paste", "cmd_selectAll",
michael@0:   "downloadsCmd_pauseResume", "downloadsCmd_cancel",
michael@0:   "downloadsCmd_open", "downloadsCmd_show", "downloadsCmd_retry",
michael@0:   "downloadsCmd_openReferrer", "downloadsCmd_clearDownloads"];
michael@0: 
michael@0: const NOT_AVAILABLE = Number.MAX_VALUE;
michael@0: 
michael@0: /**
michael@0:  * A download element shell is responsible for handling the commands and the
michael@0:  * displayed data for a single download view element. The download element
michael@0:  * could represent either a past download (for which we get data from places)  or
michael@0:  * a "session" download (using a data-item object. See DownloadsCommon.jsm), or both.
michael@0:  *
michael@0:  * Once initialized with either a data item or a places node, the created richlistitem
michael@0:  * can be accessed through the |element| getter, and can then be inserted/removed from
michael@0:  * a richlistbox.
michael@0:  *
michael@0:  * The shell doesn't take care of inserting the item, or removing it when it's no longer
michael@0:  * valid. That's the caller (a DownloadsPlacesView object) responsibility.
michael@0:  *
michael@0:  * The caller is also responsible for "passing over" notification from both the
michael@0:  * download-view and the places-result-observer, in the following manner:
michael@0:  *  - The DownloadsPlacesView object implements getViewItem of the download-view
michael@0:  *    pseudo interface.  It returns this object (therefore we implement
michael@0:  *    onStateChangea and onProgressChange here).
michael@0:  *  - The DownloadsPlacesView object adds itself as a places result observer and
michael@0:  *    calls this object's placesNodeIconChanged, placesNodeTitleChanged and
michael@0:  *    placeNodeAnnotationChanged from its callbacks.
michael@0:  *
michael@0:  * @param [optional] aDataItem
michael@0:  *        The data item of a the session download. Required if aPlacesNode is not set
michael@0:  * @param [optional] aPlacesNode
michael@0:  *        The places node for a past download. Required if aDataItem is not set.
michael@0:  * @param [optional] aAnnotations
michael@0:  *        Map containing annotations values, to speed up the initial loading.
michael@0:  */
michael@0: function DownloadElementShell(aDataItem, aPlacesNode, aAnnotations) {
michael@0:   this._element = document.createElement("richlistitem");
michael@0:   this._element._shell = this;
michael@0: 
michael@0:   this._element.classList.add("download");
michael@0:   this._element.classList.add("download-state");
michael@0: 
michael@0:   if (aAnnotations)
michael@0:     this._annotations = aAnnotations;
michael@0:   if (aDataItem)
michael@0:     this.dataItem = aDataItem;
michael@0:   if (aPlacesNode)
michael@0:     this.placesNode = aPlacesNode;
michael@0: }
michael@0: 
michael@0: DownloadElementShell.prototype = {
michael@0:   // The richlistitem for the download
michael@0:   get element() this._element,
michael@0: 
michael@0:   /**
michael@0:    * Manages the "active" state of the shell.  By default all the shells
michael@0:    * without a dataItem are inactive, thus their UI is not updated.  They must
michael@0:    * be activated when entering the visible area.  Session downloads are
michael@0:    * always active since they always have a dataItem.
michael@0:    */
michael@0:   ensureActive: function DES_ensureActive() {
michael@0:     if (!this._active) {
michael@0:       this._active = true;
michael@0:       this._element.setAttribute("active", true);
michael@0:       this._updateUI();
michael@0:     }
michael@0:   },
michael@0:   get active() !!this._active,
michael@0: 
michael@0:   // The data item for the download
michael@0:   _dataItem: null,
michael@0:   get dataItem() this._dataItem,
michael@0: 
michael@0:   set dataItem(aValue) {
michael@0:     if (this._dataItem != aValue) {
michael@0:       if (!aValue && !this._placesNode)
michael@0:         throw new Error("Should always have either a dataItem or a placesNode");
michael@0: 
michael@0:       this._dataItem = aValue;
michael@0:       if (!this.active)
michael@0:         this.ensureActive();
michael@0:       else
michael@0:         this._updateUI();
michael@0:     }
michael@0:     return aValue;
michael@0:   },
michael@0: 
michael@0:   _placesNode: null,
michael@0:   get placesNode() this._placesNode,
michael@0:   set placesNode(aValue) {
michael@0:     if (this._placesNode != aValue) {
michael@0:       if (!aValue && !this._dataItem)
michael@0:         throw new Error("Should always have either a dataItem or a placesNode");
michael@0: 
michael@0:       // Preserve the annotations map if this is the first loading and we got
michael@0:       // cached values.
michael@0:       if (this._placesNode || !this._annotations) {
michael@0:         this._annotations = new Map();
michael@0:       }
michael@0: 
michael@0:       this._placesNode = aValue;
michael@0: 
michael@0:       // We don't need to update the UI if we had a data item, because
michael@0:       // the places information isn't used in this case.
michael@0:       if (!this._dataItem && this.active)
michael@0:         this._updateUI();
michael@0:     }
michael@0:     return aValue;
michael@0:   },
michael@0: 
michael@0:   // The download uri (as a string)
michael@0:   get downloadURI() {
michael@0:     if (this._dataItem)
michael@0:      return this._dataItem.uri;
michael@0:     if (this._placesNode)
michael@0:       return this._placesNode.uri;
michael@0:     throw new Error("Unexpected download element state");
michael@0:   },
michael@0: 
michael@0:   get _downloadURIObj() {
michael@0:     if (!("__downloadURIObj" in this))
michael@0:       this.__downloadURIObj = NetUtil.newURI(this.downloadURI);
michael@0:     return this.__downloadURIObj;
michael@0:   },
michael@0: 
michael@0:   _getIcon: function DES__getIcon() {
michael@0:     let metaData = this.getDownloadMetaData();
michael@0:     if ("filePath" in metaData)
michael@0:       return "moz-icon://" + metaData.filePath + "?size=32";
michael@0: 
michael@0:     if (this._placesNode) {
michael@0:       // Try to extract an extension from the uri.
michael@0:       let ext = this._downloadURIObj.QueryInterface(Ci.nsIURL).fileExtension;
michael@0:       if (ext)
michael@0:         return "moz-icon://." + ext + "?size=32";
michael@0:       return this._placesNode.icon || "moz-icon://.unknown?size=32";
michael@0:     }
michael@0:     if (this._dataItem)
michael@0:       throw new Error("Session-download items should always have a target file uri");
michael@0: 
michael@0:     throw new Error("Unexpected download element state");
michael@0:   },
michael@0: 
michael@0:   // Helper for getting a places annotation set for the download.
michael@0:   _getAnnotation: function DES__getAnnotation(aAnnotation, aDefaultValue) {
michael@0:     let value;
michael@0:     if (this._annotations.has(aAnnotation))
michael@0:       value = this._annotations.get(aAnnotation);
michael@0: 
michael@0:     // If the value is cached, or we know it doesn't exist, avoid a database
michael@0:     // lookup.
michael@0:     if (value === undefined) {
michael@0:       try {
michael@0:         value = PlacesUtils.annotations.getPageAnnotation(
michael@0:           this._downloadURIObj, aAnnotation);
michael@0:       }
michael@0:       catch(ex) {
michael@0:         value = NOT_AVAILABLE;
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     if (value === NOT_AVAILABLE) {
michael@0:       if (aDefaultValue === undefined) {
michael@0:         throw new Error("Could not get required annotation '" + aAnnotation +
michael@0:                         "' for download with url '" + this.downloadURI + "'");
michael@0:       }
michael@0:       value = aDefaultValue;
michael@0:     }
michael@0: 
michael@0:     this._annotations.set(aAnnotation, value);
michael@0:     return value;
michael@0:   },
michael@0: 
michael@0:   _fetchTargetFileInfo: function DES__fetchTargetFileInfo(aUpdateMetaDataAndStatusUI = false) {
michael@0:     if (this._targetFileInfoFetched)
michael@0:       throw new Error("_fetchTargetFileInfo should not be called if the information was already fetched");
michael@0:     if (!this.active)
michael@0:       throw new Error("Trying to _fetchTargetFileInfo on an inactive download shell");
michael@0: 
michael@0:     let path = this.getDownloadMetaData().filePath;
michael@0: 
michael@0:     // In previous version, the target file annotations were not set,
michael@0:     // so we cannot tell where is the file.
michael@0:     if (path === undefined) {
michael@0:       this._targetFileInfoFetched = true;
michael@0:       this._targetFileExists = false;
michael@0:       if (aUpdateMetaDataAndStatusUI) {
michael@0:         this._metaData = null;
michael@0:         this._updateDownloadStatusUI();
michael@0:       }
michael@0:       // Here we don't need to update the download commands,
michael@0:       // as the state is unknown as it was.
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     OS.File.stat(path).then(
michael@0:       function onSuccess(fileInfo) {
michael@0:         this._targetFileInfoFetched = true;
michael@0:         this._targetFileExists = true;
michael@0:         this._targetFileSize = fileInfo.size;
michael@0:         if (aUpdateMetaDataAndStatusUI) {
michael@0:           this._metaData = null;
michael@0:           this._updateDownloadStatusUI();
michael@0:         }
michael@0:         if (this._element.selected)
michael@0:           goUpdateDownloadCommands();
michael@0:       }.bind(this),
michael@0: 
michael@0:       function onFailure(aReason) {
michael@0:         if (aReason instanceof OS.File.Error && aReason.becauseNoSuchFile) {
michael@0:           this._targetFileInfoFetched = true;
michael@0:           this._targetFileExists = false;
michael@0:         }
michael@0:         else {
michael@0:           Cu.reportError("Could not fetch info for target file (reason: " +
michael@0:                          aReason + ")");
michael@0:         }
michael@0: 
michael@0:         if (aUpdateMetaDataAndStatusUI) {
michael@0:           this._metaData = null;
michael@0:           this._updateDownloadStatusUI();
michael@0:         }
michael@0: 
michael@0:         if (this._element.selected)
michael@0:           goUpdateDownloadCommands();
michael@0:       }.bind(this)
michael@0:     );
michael@0:   },
michael@0: 
michael@0:   _getAnnotatedMetaData: function DES__getAnnotatedMetaData()
michael@0:     JSON.parse(this._getAnnotation(DOWNLOAD_META_DATA_ANNO)),
michael@0: 
michael@0:   _extractFilePathAndNameFromFileURI:
michael@0:   function DES__extractFilePathAndNameFromFileURI(aFileURI) {
michael@0:     let file = Cc["@mozilla.org/network/protocol;1?name=file"]
michael@0:                 .getService(Ci.nsIFileProtocolHandler)
michael@0:                 .getFileFromURLSpec(aFileURI);
michael@0:     return [file.path, file.leafName];
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Retrieve the meta data object for the download.  The following fields
michael@0:    * may be set.
michael@0:    *
michael@0:    * - state - any download state defined in nsIDownloadManager.  If this field
michael@0:    *   is not set, the download state is unknown.
michael@0:    * - endTime: the end time of the download.
michael@0:    * - filePath: the downloaded file path on the file system, when it
michael@0:    *   was downloaded.  The file may not exist.  This is set for session
michael@0:    *   downloads that have a local file set, and for history downloads done
michael@0:    *   after the landing of bug 591289.
michael@0:    * - fileName: the downloaded file name on the file system. Set if filePath
michael@0:    *   is set.
michael@0:    * - displayName: the user-facing label for the download.  This is always
michael@0:    *   set.  If available, it's set to the downloaded file name.  If not,
michael@0:    *   the places title for the download uri is used it's set.  As a last
michael@0:    *   resort, we fallback to the download uri.
michael@0:    * - fileSize (only set for downloads which completed succesfully):
michael@0:    *   the downloaded file size.  For downloads done after the landing of
michael@0:    *   bug 826991, this value is "static" - that is, it does not necessarily
michael@0:    *   mean that the file is in place and has this size.
michael@0:    */
michael@0:   getDownloadMetaData: function DES_getDownloadMetaData() {
michael@0:     if (!this._metaData) {
michael@0:       if (this._dataItem) {
michael@0:         this._metaData = {
michael@0:           state:       this._dataItem.state,
michael@0:           endTime:     this._dataItem.endTime,
michael@0:           fileName:    this._dataItem.target,
michael@0:           displayName: this._dataItem.target
michael@0:         };
michael@0:         if (this._dataItem.done)
michael@0:           this._metaData.fileSize = this._dataItem.maxBytes;
michael@0:         if (this._dataItem.localFile)
michael@0:           this._metaData.filePath = this._dataItem.localFile.path;
michael@0:       }
michael@0:       else {
michael@0:         try {
michael@0:           this._metaData = this._getAnnotatedMetaData();
michael@0:         }
michael@0:         catch(ex) {
michael@0:           this._metaData = { };
michael@0:           if (this._targetFileInfoFetched && this._targetFileExists) {
michael@0:             this._metaData.state = this._targetFileSize > 0 ?
michael@0:               nsIDM.DOWNLOAD_FINISHED : nsIDM.DOWNLOAD_FAILED;
michael@0:             this._metaData.fileSize = this._targetFileSize;
michael@0:           }
michael@0: 
michael@0:           // This is actually the start-time, but it's the best we can get.
michael@0:           this._metaData.endTime = this._placesNode.time / 1000;
michael@0:         }
michael@0: 
michael@0:         try {
michael@0:           let targetFileURI = this._getAnnotation(DESTINATION_FILE_URI_ANNO);
michael@0:           [this._metaData.filePath, this._metaData.fileName] =
michael@0:             this._extractFilePathAndNameFromFileURI(targetFileURI);
michael@0:           this._metaData.displayName = this._metaData.fileName;
michael@0:         }
michael@0:         catch(ex) {
michael@0:           this._metaData.displayName = this._placesNode.title || this.downloadURI;
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:     return this._metaData;
michael@0:   },
michael@0: 
michael@0:   // The status text for the download
michael@0:   _getStatusText: function DES__getStatusText() {
michael@0:     let s = DownloadsCommon.strings;
michael@0:     if (this._dataItem && this._dataItem.inProgress) {
michael@0:       if (this._dataItem.paused) {
michael@0:         let transfer =
michael@0:           DownloadUtils.getTransferTotal(this._dataItem.currBytes,
michael@0:                                          this._dataItem.maxBytes);
michael@0: 
michael@0:          // We use the same XUL label to display both the state and the amount
michael@0:          // transferred, for example "Paused -  1.1 MB".
michael@0:          return s.statusSeparatorBeforeNumber(s.statePaused, transfer);
michael@0:       }
michael@0:       if (this._dataItem.state == nsIDM.DOWNLOAD_DOWNLOADING) {
michael@0:         let [status, newEstimatedSecondsLeft] =
michael@0:           DownloadUtils.getDownloadStatus(this.dataItem.currBytes,
michael@0:                                           this.dataItem.maxBytes,
michael@0:                                           this.dataItem.speed,
michael@0:                                           this._lastEstimatedSecondsLeft || Infinity);
michael@0:         this._lastEstimatedSecondsLeft = newEstimatedSecondsLeft;
michael@0:         return status;
michael@0:       }
michael@0:       if (this._dataItem.starting) {
michael@0:         return s.stateStarting;
michael@0:       }
michael@0:       if (this._dataItem.state == nsIDM.DOWNLOAD_SCANNING) {
michael@0:         return s.stateScanning;
michael@0:       }
michael@0: 
michael@0:       throw new Error("_getStatusText called with a bogus download state");
michael@0:     }
michael@0: 
michael@0:     // This is a not-in-progress or history download.
michael@0:     let stateLabel = "";
michael@0:     let state = this.getDownloadMetaData().state;
michael@0:     switch (state) {
michael@0:       case nsIDM.DOWNLOAD_FAILED:
michael@0:         stateLabel = s.stateFailed;
michael@0:         break;
michael@0:       case nsIDM.DOWNLOAD_CANCELED:
michael@0:         stateLabel = s.stateCanceled;
michael@0:         break;
michael@0:       case nsIDM.DOWNLOAD_BLOCKED_PARENTAL:
michael@0:         stateLabel = s.stateBlockedParentalControls;
michael@0:         break;
michael@0:       case nsIDM.DOWNLOAD_BLOCKED_POLICY:
michael@0:         stateLabel = s.stateBlockedPolicy;
michael@0:         break;
michael@0:       case nsIDM.DOWNLOAD_DIRTY:
michael@0:         stateLabel = s.stateDirty;
michael@0:         break;
michael@0:       case nsIDM.DOWNLOAD_FINISHED:{
michael@0:         // For completed downloads, show the file size (e.g. "1.5 MB")
michael@0:         let metaData = this.getDownloadMetaData();
michael@0:         if ("fileSize" in metaData) {
michael@0:           let [size, unit] = DownloadUtils.convertByteUnits(metaData.fileSize);
michael@0:           stateLabel = s.sizeWithUnits(size, unit);
michael@0:           break;
michael@0:         }
michael@0:         // Fallback to default unknown state.
michael@0:       }
michael@0:       default:
michael@0:         stateLabel = s.sizeUnknown;
michael@0:         break;
michael@0:     }
michael@0: 
michael@0:     // TODO (bug 829201): history downloads should get the referrer from Places.
michael@0:     let referrer = this._dataItem && this._dataItem.referrer ||
michael@0:                    this.downloadURI;
michael@0:     let [displayHost, fullHost] = DownloadUtils.getURIHost(referrer);
michael@0: 
michael@0:     let date = new Date(this.getDownloadMetaData().endTime);
michael@0:     let [displayDate, fullDate] = DownloadUtils.getReadableDates(date);
michael@0: 
michael@0:     // We use the same XUL label to display the state, the host name, and the
michael@0:     // end time.
michael@0:     let firstPart = s.statusSeparator(stateLabel, displayHost);
michael@0:     return s.statusSeparator(firstPart, displayDate);
michael@0:   },
michael@0: 
michael@0:   // The progressmeter element for the download
michael@0:   get _progressElement() {
michael@0:     if (!("__progressElement" in this)) {
michael@0:       this.__progressElement =
michael@0:         document.getAnonymousElementByAttribute(this._element, "anonid",
michael@0:                                                 "progressmeter");
michael@0:     }
michael@0:     return this.__progressElement;
michael@0:   },
michael@0: 
michael@0:   // Updates the download state attribute (and by that hide/unhide the
michael@0:   // appropriate buttons and context menu items), the status text label,
michael@0:   // and the progress meter.
michael@0:   _updateDownloadStatusUI: function  DES__updateDownloadStatusUI() {
michael@0:     if (!this.active)
michael@0:       throw new Error("_updateDownloadStatusUI called for an inactive item.");
michael@0: 
michael@0:     let state = this.getDownloadMetaData().state;
michael@0:     if (state !== undefined)
michael@0:       this._element.setAttribute("state", state);
michael@0: 
michael@0:     this._element.setAttribute("status", this._getStatusText());
michael@0: 
michael@0:     // For past-downloads, we're done. For session-downloads, we may also need
michael@0:     // to update the progress-meter.
michael@0:     if (!this._dataItem)
michael@0:       return;
michael@0: 
michael@0:     // Copied from updateProgress in downloads.js.
michael@0:     if (this._dataItem.starting) {
michael@0:       // Before the download starts, the progress meter has its initial value.
michael@0:       this._element.setAttribute("progressmode", "normal");
michael@0:       this._element.setAttribute("progress", "0");
michael@0:     }
michael@0:     else if (this._dataItem.state == nsIDM.DOWNLOAD_SCANNING ||
michael@0:              this._dataItem.percentComplete == -1) {
michael@0:       // We might not know the progress of a running download, and we don't know
michael@0:       // the remaining time during the malware scanning phase.
michael@0:       this._element.setAttribute("progressmode", "undetermined");
michael@0:     }
michael@0:     else {
michael@0:       // This is a running download of which we know the progress.
michael@0:       this._element.setAttribute("progressmode", "normal");
michael@0:       this._element.setAttribute("progress", this._dataItem.percentComplete);
michael@0:     }
michael@0: 
michael@0:     // Dispatch the ValueChange event for accessibility, if possible.
michael@0:     if (this._progressElement) {
michael@0:       let event = document.createEvent("Events");
michael@0:       event.initEvent("ValueChange", true, true);
michael@0:       this._progressElement.dispatchEvent(event);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _updateDisplayNameAndIcon: function DES__updateDisplayNameAndIcon() {
michael@0:     let metaData = this.getDownloadMetaData();
michael@0:     this._element.setAttribute("displayName", metaData.displayName);
michael@0:     this._element.setAttribute("image", this._getIcon());
michael@0:   },
michael@0: 
michael@0:   _updateUI: function DES__updateUI() {
michael@0:     if (!this.active)
michael@0:       throw new Error("Trying to _updateUI on an inactive download shell");
michael@0: 
michael@0:     this._metaData = null;
michael@0:     this._targetFileInfoFetched = false;
michael@0: 
michael@0:     this._updateDisplayNameAndIcon();
michael@0: 
michael@0:     // For history downloads done in past releases, the downloads/metaData
michael@0:     // annotation is not set, and therefore we cannot tell the download
michael@0:     // state without the target file information.
michael@0:     if (this._dataItem || this.getDownloadMetaData().state !== undefined)
michael@0:       this._updateDownloadStatusUI();
michael@0:     else
michael@0:       this._fetchTargetFileInfo(true);
michael@0:   },
michael@0: 
michael@0:   placesNodeIconChanged: function DES_placesNodeIconChanged() {
michael@0:     if (!this._dataItem)
michael@0:       this._element.setAttribute("image", this._getIcon());
michael@0:   },
michael@0: 
michael@0:   placesNodeTitleChanged: function DES_placesNodeTitleChanged() {
michael@0:     // If there's a file path, we use the leaf name for the title.
michael@0:     if (!this._dataItem && this.active && !this.getDownloadMetaData().filePath) {
michael@0:       this._metaData = null;
michael@0:       this._updateDisplayNameAndIcon();
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   placesNodeAnnotationChanged: function DES_placesNodeAnnotationChanged(aAnnoName) {
michael@0:     this._annotations.delete(aAnnoName);
michael@0:     if (!this._dataItem && this.active) {
michael@0:       if (aAnnoName == DOWNLOAD_META_DATA_ANNO) {
michael@0:         let metaData = this.getDownloadMetaData();
michael@0:         let annotatedMetaData = this._getAnnotatedMetaData();
michael@0:         metaData.endTme = annotatedMetaData.endTime;
michael@0:         if ("fileSize" in annotatedMetaData)
michael@0:           metaData.fileSize = annotatedMetaData.fileSize;
michael@0:         else
michael@0:           delete metaData.fileSize;
michael@0: 
michael@0:         if (metaData.state != annotatedMetaData.state) {
michael@0:           metaData.state = annotatedMetaData.state;
michael@0:           if (this._element.selected)
michael@0:             goUpdateDownloadCommands();
michael@0:         }
michael@0: 
michael@0:         this._updateDownloadStatusUI();
michael@0:       }
michael@0:       else if (aAnnoName == DESTINATION_FILE_URI_ANNO) {
michael@0:         let metaData = this.getDownloadMetaData();
michael@0:         let targetFileURI = this._getAnnotation(DESTINATION_FILE_URI_ANNO);
michael@0:         [metaData.filePath, metaData.fileName] =
michael@0:             this._extractFilePathAndNameFromFileURI(targetFileURI);
michael@0:         metaData.displayName = metaData.fileName;
michael@0:         this._updateDisplayNameAndIcon();
michael@0: 
michael@0:         if (this._targetFileInfoFetched) {
michael@0:           // This will also update the download commands if necessary.
michael@0:           this._targetFileInfoFetched = false;
michael@0:           this._fetchTargetFileInfo();
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   /* DownloadView */
michael@0:   onStateChange: function DES_onStateChange(aOldState) {
michael@0:     let metaData = this.getDownloadMetaData();
michael@0:     metaData.state = this.dataItem.state;
michael@0:     if (aOldState != nsIDM.DOWNLOAD_FINISHED && aOldState != metaData.state) {
michael@0:       // See comment in DVI_onStateChange in downloads.js (the panel-view)
michael@0:       this._element.setAttribute("image", this._getIcon() + "&state=normal");
michael@0:       metaData.fileSize = this._dataItem.maxBytes;
michael@0:       if (this._targetFileInfoFetched) {
michael@0:         this._targetFileInfoFetched = false;
michael@0:         this._fetchTargetFileInfo();
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     this._updateDownloadStatusUI();
michael@0:     if (this._element.selected)
michael@0:       goUpdateDownloadCommands();
michael@0:     else
michael@0:       goUpdateCommand("downloadsCmd_clearDownloads");
michael@0:   },
michael@0: 
michael@0:   /* DownloadView */
michael@0:   onProgressChange: function DES_onProgressChange() {
michael@0:     this._updateDownloadStatusUI();
michael@0:   },
michael@0: 
michael@0:   /* nsIController */
michael@0:   isCommandEnabled: function DES_isCommandEnabled(aCommand) {
michael@0:     // The only valid command for inactive elements is cmd_delete.
michael@0:     if (!this.active && aCommand != "cmd_delete")
michael@0:       return false;
michael@0:     switch (aCommand) {
michael@0:       case "downloadsCmd_open": {
michael@0:         // We cannot open a session dowload file unless it's done ("openable").
michael@0:         // If it's finished, we need to make sure the file was not removed,
michael@0:         // as we do for past downloads.
michael@0:         if (this._dataItem && !this._dataItem.openable)
michael@0:           return false;
michael@0: 
michael@0:         if (this._targetFileInfoFetched)
michael@0:           return this._targetFileExists;
michael@0: 
michael@0:         // If the target file information is not yet fetched,
michael@0:         // temporarily assume that the file is in place.
michael@0:         return this.getDownloadMetaData().state == nsIDM.DOWNLOAD_FINISHED;
michael@0:       }
michael@0:       case "downloadsCmd_show": {
michael@0:         // TODO: Bug 827010 - Handle part-file asynchronously.
michael@0:         if (this._dataItem &&
michael@0:             this._dataItem.partFile && this._dataItem.partFile.exists())
michael@0:           return true;
michael@0: 
michael@0:         if (this._targetFileInfoFetched)
michael@0:           return this._targetFileExists;
michael@0: 
michael@0:         // If the target file information is not yet fetched,
michael@0:         // temporarily assume that the file is in place.
michael@0:         return this.getDownloadMetaData().state == nsIDM.DOWNLOAD_FINISHED;
michael@0:       }
michael@0:       case "downloadsCmd_pauseResume":
michael@0:         return this._dataItem && this._dataItem.inProgress && this._dataItem.resumable;
michael@0:       case "downloadsCmd_retry":
michael@0:         // An history download can always be retried.
michael@0:         return !this._dataItem || this._dataItem.canRetry;
michael@0:       case "downloadsCmd_openReferrer":
michael@0:         return this._dataItem && !!this._dataItem.referrer;
michael@0:       case "cmd_delete":
michael@0:         // The behavior in this case is somewhat unexpected, so we disallow that.
michael@0:         if (this._placesNode && this._dataItem && this._dataItem.inProgress)
michael@0:           return false;
michael@0:         return true;
michael@0:       case "downloadsCmd_cancel":
michael@0:         return this._dataItem != null;
michael@0:     }
michael@0:     return false;
michael@0:   },
michael@0: 
michael@0:   _retryAsHistoryDownload: function DES__retryAsHistoryDownload() {
michael@0:     // In future we may try to download into the same original target uri, when
michael@0:     // we have it.  Though that requires verifying the path is still valid and
michael@0:     // may surprise the user if he wants to be requested every time.
michael@0:     let browserWin = RecentWindow.getMostRecentBrowserWindow();
michael@0:     let initiatingDoc = browserWin ? browserWin.document : document;
michael@0:     DownloadURL(this.downloadURI, this.getDownloadMetaData().fileName,
michael@0:                 initiatingDoc);
michael@0:   },
michael@0: 
michael@0:   /* nsIController */
michael@0:   doCommand: function DES_doCommand(aCommand) {
michael@0:     switch (aCommand) {
michael@0:       case "downloadsCmd_open": {
michael@0:         let file = this._dataItem ?
michael@0:           this.dataItem.localFile :
michael@0:           new FileUtils.File(this.getDownloadMetaData().filePath);
michael@0: 
michael@0:         DownloadsCommon.openDownloadedFile(file, null, window);
michael@0:         break;
michael@0:       }
michael@0:       case "downloadsCmd_show": {
michael@0:         if (this._dataItem) {
michael@0:           this._dataItem.showLocalFile();
michael@0:         }
michael@0:         else {
michael@0:           let file = new FileUtils.File(this.getDownloadMetaData().filePath);
michael@0:           DownloadsCommon.showDownloadedFile(file);
michael@0:         }
michael@0:         break;
michael@0:       }
michael@0:       case "downloadsCmd_openReferrer": {
michael@0:         openURL(this._dataItem.referrer);
michael@0:         break;
michael@0:       }
michael@0:       case "downloadsCmd_cancel": {
michael@0:         this._dataItem.cancel();
michael@0:         break;
michael@0:       }
michael@0:       case "cmd_delete": {
michael@0:         if (this._dataItem)
michael@0:           this._dataItem.remove();
michael@0:         if (this._placesNode)
michael@0:           PlacesUtils.bhistory.removePage(this._downloadURIObj);
michael@0:         break;
michael@0:        }
michael@0:       case "downloadsCmd_retry": {
michael@0:         if (this._dataItem)
michael@0:           this._dataItem.retry();
michael@0:         else
michael@0:           this._retryAsHistoryDownload();
michael@0:         break;
michael@0:       }
michael@0:       case "downloadsCmd_pauseResume": {
michael@0:         this._dataItem.togglePauseResume();
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   // Returns whether or not the download handled by this shell should
michael@0:   // show up in the search results for the given term.  Both the display
michael@0:   // name for the download and the url are searched.
michael@0:   matchesSearchTerm: function DES_matchesSearchTerm(aTerm) {
michael@0:     if (!aTerm)
michael@0:       return true;
michael@0:     aTerm = aTerm.toLowerCase();
michael@0:     return this.getDownloadMetaData().displayName.toLowerCase().contains(aTerm) ||
michael@0:            this.downloadURI.toLowerCase().contains(aTerm);
michael@0:   },
michael@0: 
michael@0:   // Handles return kepress on the element (the keypress listener is
michael@0:   // set in the DownloadsPlacesView object).
michael@0:   doDefaultCommand: function DES_doDefaultCommand() {
michael@0:     function getDefaultCommandForState(aState) {
michael@0:       switch (aState) {
michael@0:         case nsIDM.DOWNLOAD_FINISHED:
michael@0:           return "downloadsCmd_open";
michael@0:         case nsIDM.DOWNLOAD_PAUSED:
michael@0:           return "downloadsCmd_pauseResume";
michael@0:         case nsIDM.DOWNLOAD_NOTSTARTED:
michael@0:         case nsIDM.DOWNLOAD_QUEUED:
michael@0:           return "downloadsCmd_cancel";
michael@0:         case nsIDM.DOWNLOAD_FAILED:
michael@0:         case nsIDM.DOWNLOAD_CANCELED:
michael@0:           return "downloadsCmd_retry";
michael@0:         case nsIDM.DOWNLOAD_SCANNING:
michael@0:           return "downloadsCmd_show";
michael@0:         case nsIDM.DOWNLOAD_BLOCKED_PARENTAL:
michael@0:         case nsIDM.DOWNLOAD_DIRTY:
michael@0:         case nsIDM.DOWNLOAD_BLOCKED_POLICY:
michael@0:           return "downloadsCmd_openReferrer";
michael@0:       }
michael@0:       return "";
michael@0:     }
michael@0:     let command = getDefaultCommandForState(this.getDownloadMetaData().state);
michael@0:     if (command && this.isCommandEnabled(command))
michael@0:       this.doCommand(command);
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * At the first time an item is selected, we don't yet have
michael@0:    * the target file information.  Thus the call to goUpdateDownloadCommands
michael@0:    * in DPV_onSelect would result in best-guess enabled/disabled result.
michael@0:    * That way we let the user perform command immediately. However, once
michael@0:    * we have the target file information, we can update the commands
michael@0:    * appropriately (_fetchTargetFileInfo() calls goUpdateDownloadCommands).
michael@0:    */
michael@0:   onSelect: function DES_onSelect() {
michael@0:     if (!this.active)
michael@0:       return;
michael@0:     if (!this._targetFileInfoFetched)
michael@0:       this._fetchTargetFileInfo();
michael@0:   }
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * A Downloads Places View is a places view designed to show a places query
michael@0:  * for history donwloads alongside the current "session"-downloads.
michael@0:  *
michael@0:  * As we don't use the places controller, some methods implemented by other
michael@0:  * places views are not implemented by this view.
michael@0:  *
michael@0:  * A richlistitem in this view can represent either a past download or a session
michael@0:  * download, or both. Session downloads are shown first in the view, and as long
michael@0:  * as they exist they "collapses" their history "counterpart" (So we don't show two
michael@0:  * items for every download).
michael@0:  */
michael@0: function DownloadsPlacesView(aRichListBox, aActive = true) {
michael@0:   this._richlistbox = aRichListBox;
michael@0:   this._richlistbox._placesView = this;
michael@0:   window.controllers.insertControllerAt(0, this);
michael@0: 
michael@0:   // Map download URLs to download element shells regardless of their type
michael@0:   this._downloadElementsShellsForURI = new Map();
michael@0: 
michael@0:   // Map download data items to their element shells.
michael@0:   this._viewItemsForDataItems = new WeakMap();
michael@0: 
michael@0:   // Points to the last session download element. We keep track of this
michael@0:   // in order to keep all session downloads above past downloads.
michael@0:   this._lastSessionDownloadElement = null;
michael@0: 
michael@0:   this._searchTerm = "";
michael@0: 
michael@0:   this._active = aActive;
michael@0: 
michael@0:   // Register as a downloads view. The places data will be initialized by
michael@0:   // the places setter.
michael@0:   this._initiallySelectedElement = null;
michael@0:   this._downloadsData = DownloadsCommon.getData(window.opener || window);
michael@0:   this._downloadsData.addView(this);
michael@0: 
michael@0:   // Get the Download button out of the attention state since we're about to
michael@0:   // view all downloads.
michael@0:   DownloadsCommon.getIndicatorData(window).attention = false;
michael@0: 
michael@0:   // Make sure to unregister the view if the window is closed.
michael@0:   window.addEventListener("unload", function() {
michael@0:     window.controllers.removeController(this);
michael@0:     this._downloadsData.removeView(this);
michael@0:     this.result = null;
michael@0:   }.bind(this), true);
michael@0:   // Resizing the window may change items visibility.
michael@0:   window.addEventListener("resize", function() {
michael@0:     this._ensureVisibleElementsAreActive();
michael@0:   }.bind(this), true);
michael@0: }
michael@0: 
michael@0: DownloadsPlacesView.prototype = {
michael@0:   get associatedElement() this._richlistbox,
michael@0: 
michael@0:   get active() this._active,
michael@0:   set active(val) {
michael@0:     this._active = val;
michael@0:     if (this._active)
michael@0:       this._ensureVisibleElementsAreActive();
michael@0:     return this._active;
michael@0:   },
michael@0: 
michael@0:   _forEachDownloadElementShellForURI:
michael@0:   function DPV__forEachDownloadElementShellForURI(aURI, aCallback) {
michael@0:     if (this._downloadElementsShellsForURI.has(aURI)) {
michael@0:       let downloadElementShells = this._downloadElementsShellsForURI.get(aURI);
michael@0:       for (let des of downloadElementShells) {
michael@0:         aCallback(des);
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _getAnnotationsFor: function DPV_getAnnotationsFor(aURI) {
michael@0:     if (!this._cachedAnnotations) {
michael@0:       this._cachedAnnotations = new Map();
michael@0:       for (let name of [ DESTINATION_FILE_URI_ANNO,
michael@0:                          DOWNLOAD_META_DATA_ANNO ]) {
michael@0:         let results = PlacesUtils.annotations.getAnnotationsWithName(name);
michael@0:         for (let result of results) {
michael@0:           let url = result.uri.spec;
michael@0:           if (!this._cachedAnnotations.has(url))
michael@0:             this._cachedAnnotations.set(url, new Map());
michael@0:           let m = this._cachedAnnotations.get(url);
michael@0:           m.set(result.annotationName, result.annotationValue);
michael@0:         }
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     let annotations = this._cachedAnnotations.get(aURI);
michael@0:     if (!annotations) {
michael@0:       // There are no annotations for this entry, that means it is quite old.
michael@0:       // Make up a fake annotations entry with default values.
michael@0:       annotations = new Map();
michael@0:       annotations.set(DESTINATION_FILE_URI_ANNO, NOT_AVAILABLE);
michael@0:     }
michael@0:     // The meta-data annotation has been added recently, so it's likely missing.
michael@0:     if (!annotations.has(DOWNLOAD_META_DATA_ANNO)) {
michael@0:       annotations.set(DOWNLOAD_META_DATA_ANNO, NOT_AVAILABLE);
michael@0:     }
michael@0:     return annotations;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Given a data item for a session download, or a places node for a past
michael@0:    * download, updates the view as necessary.
michael@0:    *  1. If the given data is a places node, we check whether there are any
michael@0:    *     elements for the same download url. If there are, then we just reset
michael@0:    *     their places node. Otherwise we add a new download element.
michael@0:    *  2. If the given data is a data item, we first check if there's a history
michael@0:    *     download in the list that is not associated with a data item. If we
michael@0:    *     found one, we use it for the data item as well and reposition it
michael@0:    *     alongside the other session downloads. If we don't, then we go ahead
michael@0:    *     and create a new element for the download.
michael@0:    *
michael@0:    * @param aDataItem
michael@0:    *        The data item of a session download. Set to null for history
michael@0:    *        downloads data.
michael@0:    * @param [optional] aPlacesNode
michael@0:    *        The places node for a history download. Required if there's no data
michael@0:    *        item.
michael@0:    * @param [optional] aNewest
michael@0:    *        @see onDataItemAdded. Ignored for history downlods.
michael@0:    * @param [optional] aDocumentFragment
michael@0:    *        To speed up the appending of multiple elements to the end of the
michael@0:    *        list which are coming in a single batch (i.e. invalidateContainer),
michael@0:    *        a document fragment may be passed to which the new elements would
michael@0:    *        be appended. It's the caller's job to ensure the fragment is merged
michael@0:    *        to the richlistbox at the end.
michael@0:    */
michael@0:   _addDownloadData:
michael@0:   function DPV_addDownloadData(aDataItem, aPlacesNode, aNewest = false,
michael@0:                                aDocumentFragment = null) {
michael@0:     let downloadURI = aPlacesNode ? aPlacesNode.uri : aDataItem.uri;
michael@0:     let shellsForURI = this._downloadElementsShellsForURI.get(downloadURI);
michael@0:     if (!shellsForURI) {
michael@0:       shellsForURI = new Set();
michael@0:       this._downloadElementsShellsForURI.set(downloadURI, shellsForURI);
michael@0:     }
michael@0: 
michael@0:     let newOrUpdatedShell = null;
michael@0: 
michael@0:     // Trivial: if there are no shells for this download URI, we always
michael@0:     // need to create one.
michael@0:     let shouldCreateShell = shellsForURI.size == 0;
michael@0: 
michael@0:     // However, if we do have shells for this download uri, there are
michael@0:     // few options:
michael@0:     // 1) There's only one shell and it's for a history download (it has
michael@0:     //    no data item). In this case, we update this shell and move it
michael@0:     //    if necessary
michael@0:     // 2) There are multiple shells, indicicating multiple downloads for
michael@0:     //    the same download uri are running. In this case we create
michael@0:     //    anoter shell for the download (so we have one shell for each data
michael@0:     //    item).
michael@0:     //
michael@0:     // Note: If a cancelled session download is already in the list, and the
michael@0:     // download is retired, onDataItemAdded is called again for the same
michael@0:     // data item. Thus, we also check that we make sure we don't have a view item
michael@0:     // already.
michael@0:     if (!shouldCreateShell &&
michael@0:         aDataItem && this.getViewItem(aDataItem) == null) {
michael@0:       // If there's a past-download-only shell for this download-uri with no
michael@0:       // associated data item, use it for the new data item. Otherwise, go ahead
michael@0:       // and create another shell.
michael@0:       shouldCreateShell = true;
michael@0:       for (let shell of shellsForURI) {
michael@0:         if (!shell.dataItem) {
michael@0:           shouldCreateShell = false;
michael@0:           shell.dataItem = aDataItem;
michael@0:           newOrUpdatedShell = shell;
michael@0:           this._viewItemsForDataItems.set(aDataItem, shell);
michael@0:           break;
michael@0:         }
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     if (shouldCreateShell) {
michael@0:       // Bug 836271: The annotations for a url should be cached only when the
michael@0:       // places node is available, i.e. when we know we we'd be notified for
michael@0:       // annoation changes. 
michael@0:       // Otherwise we may cache NOT_AVILABLE values first for a given session
michael@0:       // download, and later use these NOT_AVILABLE values when a history
michael@0:       // download for the same URL is added.
michael@0:       let cachedAnnotations = aPlacesNode ? this._getAnnotationsFor(downloadURI) : null;
michael@0:       let shell = new DownloadElementShell(aDataItem, aPlacesNode, cachedAnnotations);
michael@0:       newOrUpdatedShell = shell;
michael@0:       shellsForURI.add(shell);
michael@0:       if (aDataItem)
michael@0:         this._viewItemsForDataItems.set(aDataItem, shell);
michael@0:     }
michael@0:     else if (aPlacesNode) {
michael@0:       for (let shell of shellsForURI) {
michael@0:         if (shell.placesNode != aPlacesNode)
michael@0:           shell.placesNode = aPlacesNode;
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     if (newOrUpdatedShell) {
michael@0:       if (aNewest) {
michael@0:         this._richlistbox.insertBefore(newOrUpdatedShell.element,
michael@0:                                        this._richlistbox.firstChild);
michael@0:         if (!this._lastSessionDownloadElement) {
michael@0:           this._lastSessionDownloadElement = newOrUpdatedShell.element;
michael@0:         }
michael@0:         // Some operations like retrying an history download move an element to
michael@0:         // the top of the richlistbox, along with other session downloads.
michael@0:         // More generally, if a new download is added, should be made visible.
michael@0:         this._richlistbox.ensureElementIsVisible(newOrUpdatedShell.element);
michael@0:       }
michael@0:       else if (aDataItem) {
michael@0:         let before = this._lastSessionDownloadElement ?
michael@0:           this._lastSessionDownloadElement.nextSibling : this._richlistbox.firstChild;
michael@0:         this._richlistbox.insertBefore(newOrUpdatedShell.element, before);
michael@0:         this._lastSessionDownloadElement = newOrUpdatedShell.element;
michael@0:       }
michael@0:       else {
michael@0:         let appendTo = aDocumentFragment || this._richlistbox;
michael@0:         appendTo.appendChild(newOrUpdatedShell.element);
michael@0:       }
michael@0: 
michael@0:       if (this.searchTerm) {
michael@0:         newOrUpdatedShell.element.hidden =
michael@0:           !newOrUpdatedShell.element._shell.matchesSearchTerm(this.searchTerm);
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     // If aDocumentFragment is defined this is a batch change, so it's up to
michael@0:     // the caller to append the fragment and activate the visible shells.
michael@0:     if (!aDocumentFragment) {
michael@0:       this._ensureVisibleElementsAreActive();
michael@0:       goUpdateCommand("downloadsCmd_clearDownloads");
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _removeElement: function DPV__removeElement(aElement) {
michael@0:     // If the element was selected exclusively, select its next
michael@0:     // sibling first, if not, try for previous sibling, if any.
michael@0:     if ((aElement.nextSibling || aElement.previousSibling) &&
michael@0:         this._richlistbox.selectedItems &&
michael@0:         this._richlistbox.selectedItems.length == 1 &&
michael@0:         this._richlistbox.selectedItems[0] == aElement) {
michael@0:       this._richlistbox.selectItem(aElement.nextSibling ||
michael@0:                                    aElement.previousSibling);
michael@0:     }
michael@0: 
michael@0:     if (this._lastSessionDownloadElement == aElement)
michael@0:       this._lastSessionDownloadElement = aElement.previousSibling;
michael@0: 
michael@0:     this._richlistbox.removeItemFromSelection(aElement);
michael@0:     this._richlistbox.removeChild(aElement);
michael@0:     this._ensureVisibleElementsAreActive();
michael@0:     goUpdateCommand("downloadsCmd_clearDownloads");
michael@0:   },
michael@0: 
michael@0:   _removeHistoryDownloadFromView:
michael@0:   function DPV__removeHistoryDownloadFromView(aPlacesNode) {
michael@0:     let downloadURI = aPlacesNode.uri;
michael@0:     let shellsForURI = this._downloadElementsShellsForURI.get(downloadURI);
michael@0:     if (shellsForURI) {
michael@0:       for (let shell of shellsForURI) {
michael@0:         if (shell.dataItem) {
michael@0:           shell.placesNode = null;
michael@0:         }
michael@0:         else {
michael@0:           this._removeElement(shell.element);
michael@0:           shellsForURI.delete(shell);
michael@0:           if (shellsForURI.size == 0)
michael@0:             this._downloadElementsShellsForURI.delete(downloadURI);
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _removeSessionDownloadFromView:
michael@0:   function DPV__removeSessionDownloadFromView(aDataItem) {
michael@0:     let shells = this._downloadElementsShellsForURI.get(aDataItem.uri);
michael@0:     if (shells.size == 0)
michael@0:       throw new Error("Should have had at leaat one shell for this uri");
michael@0: 
michael@0:     let shell = this.getViewItem(aDataItem);
michael@0:     if (!shells.has(shell))
michael@0:       throw new Error("Missing download element shell in shells list for url");
michael@0: 
michael@0:     // If there's more than one item for this download uri, we can let the
michael@0:     // view item for this this particular data item go away.
michael@0:     // If there's only one item for this download uri, we should only
michael@0:     // keep it if it is associated with a history download.
michael@0:     if (shells.size > 1 || !shell.placesNode) {
michael@0:       this._removeElement(shell.element);
michael@0:       shells.delete(shell);
michael@0:       if (shells.size == 0)
michael@0:         this._downloadElementsShellsForURI.delete(aDataItem.uri);
michael@0:     }
michael@0:     else {
michael@0:       shell.dataItem = null;
michael@0:       // Move it below the session-download items;
michael@0:       if (this._lastSessionDownloadElement == shell.element) {
michael@0:         this._lastSessionDownloadElement = shell.element.previousSibling;
michael@0:       }
michael@0:       else {
michael@0:         let before = this._lastSessionDownloadElement ?
michael@0:           this._lastSessionDownloadElement.nextSibling : this._richlistbox.firstChild;
michael@0:         this._richlistbox.insertBefore(shell.element, before);
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _ensureVisibleElementsAreActive:
michael@0:   function DPV__ensureVisibleElementsAreActive() {
michael@0:     if (!this.active || this._ensureVisibleTimer || !this._richlistbox.firstChild)
michael@0:       return;
michael@0: 
michael@0:     this._ensureVisibleTimer = setTimeout(function() {
michael@0:       delete this._ensureVisibleTimer;
michael@0:       if (!this._richlistbox.firstChild)
michael@0:         return;
michael@0: 
michael@0:       let rlbRect = this._richlistbox.getBoundingClientRect();
michael@0:       let winUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
michael@0:                            .getInterface(Ci.nsIDOMWindowUtils);
michael@0:       let nodes = winUtils.nodesFromRect(rlbRect.left, rlbRect.top,
michael@0:                                          0, rlbRect.width, rlbRect.height, 0,
michael@0:                                          true, false);
michael@0:       // nodesFromRect returns nodes in z-index order, and for the same z-index
michael@0:       // sorts them in inverted DOM order, thus starting from the one that would
michael@0:       // be on top.
michael@0:       let firstVisibleNode, lastVisibleNode;
michael@0:       for (let node of nodes) {
michael@0:         if (node.localName === "richlistitem" && node._shell) {
michael@0:           node._shell.ensureActive();
michael@0:           // The first visible node is the last match.
michael@0:           firstVisibleNode = node;
michael@0:           // While the last visible node is the first match.
michael@0:           if (!lastVisibleNode)
michael@0:             lastVisibleNode = node;
michael@0:         }
michael@0:       }
michael@0: 
michael@0:       // Also activate the first invisible nodes in both boundaries (that is,
michael@0:       // above and below the visible area) to ensure proper keyboard navigation
michael@0:       // in both directions.
michael@0:       let nodeBelowVisibleArea = lastVisibleNode && lastVisibleNode.nextSibling;
michael@0:       if (nodeBelowVisibleArea && nodeBelowVisibleArea._shell)
michael@0:         nodeBelowVisibleArea._shell.ensureActive();
michael@0: 
michael@0:       let nodeABoveVisibleArea =
michael@0:         firstVisibleNode && firstVisibleNode.previousSibling;
michael@0:       if (nodeABoveVisibleArea && nodeABoveVisibleArea._shell)
michael@0:         nodeABoveVisibleArea._shell.ensureActive();
michael@0:     }.bind(this), 10);
michael@0:   },
michael@0: 
michael@0:   _place: "",
michael@0:   get place() this._place,
michael@0:   set place(val) {
michael@0:     // Don't reload everything if we don't have to.
michael@0:     if (this._place == val) {
michael@0:       // XXXmano: places.js relies on this behavior (see Bug 822203).
michael@0:       this.searchTerm = "";
michael@0:       return val;
michael@0:     }
michael@0: 
michael@0:     this._place = val;
michael@0: 
michael@0:     let history = PlacesUtils.history;
michael@0:     let queries = { }, options = { };
michael@0:     history.queryStringToQueries(val, queries, { }, options);
michael@0:     if (!queries.value.length)
michael@0:       queries.value = [history.getNewQuery()];
michael@0: 
michael@0:     let result = history.executeQueries(queries.value, queries.value.length,
michael@0:                                         options.value);
michael@0:     result.addObserver(this, false);
michael@0:     return val;
michael@0:   },
michael@0: 
michael@0:   _result: null,
michael@0:   get result() this._result,
michael@0:   set result(val) {
michael@0:     if (this._result == val)
michael@0:       return val;
michael@0: 
michael@0:     if (this._result) {
michael@0:       this._result.removeObserver(this);
michael@0:       this._resultNode.containerOpen = false;
michael@0:     }
michael@0: 
michael@0:     if (val) {
michael@0:       this._result = val;
michael@0:       this._resultNode = val.root;
michael@0:       this._resultNode.containerOpen = true;
michael@0:       this._ensureInitialSelection();
michael@0:     }
michael@0:     else {
michael@0:       delete this._resultNode;
michael@0:       delete this._result;
michael@0:     }
michael@0: 
michael@0:     return val;
michael@0:   },
michael@0: 
michael@0:   get selectedNodes() {
michael@0:     let placesNodes = [];
michael@0:     let selectedElements = this._richlistbox.selectedItems;
michael@0:     for (let elt of selectedElements) {
michael@0:       if (elt._shell.placesNode)
michael@0:         placesNodes.push(elt._shell.placesNode);
michael@0:     }
michael@0:     return placesNodes;
michael@0:   },
michael@0: 
michael@0:   get selectedNode() {
michael@0:     let selectedNodes = this.selectedNodes;
michael@0:     return selectedNodes.length == 1 ? selectedNodes[0] : null;
michael@0:   },
michael@0: 
michael@0:   get hasSelection() this.selectedNodes.length > 0,
michael@0: 
michael@0:   containerStateChanged:
michael@0:   function DPV_containerStateChanged(aNode, aOldState, aNewState) {
michael@0:     this.invalidateContainer(aNode)
michael@0:   },
michael@0: 
michael@0:   invalidateContainer:
michael@0:   function DPV_invalidateContainer(aContainer) {
michael@0:     if (aContainer != this._resultNode)
michael@0:       throw new Error("Unexpected container node");
michael@0:     if (!aContainer.containerOpen)
michael@0:       throw new Error("Root container for the downloads query cannot be closed");
michael@0: 
michael@0:     let suppressOnSelect = this._richlistbox.suppressOnSelect;
michael@0:     this._richlistbox.suppressOnSelect = true;
michael@0:     try {
michael@0:       // Remove the invalidated history downloads from the list and unset the
michael@0:       // places node for data downloads.
michael@0:       // Loop backwards since _removeHistoryDownloadFromView may removeChild().
michael@0:       for (let i = this._richlistbox.childNodes.length - 1; i >= 0; --i) {
michael@0:         let element = this._richlistbox.childNodes[i];
michael@0:         if (element._shell.placesNode)
michael@0:           this._removeHistoryDownloadFromView(element._shell.placesNode);
michael@0:       }
michael@0:     }
michael@0:     finally {
michael@0:       this._richlistbox.suppressOnSelect = suppressOnSelect;
michael@0:     }
michael@0: 
michael@0:     if (aContainer.childCount > 0) {
michael@0:       let elementsToAppendFragment = document.createDocumentFragment();
michael@0:       for (let i = 0; i < aContainer.childCount; i++) {
michael@0:         try {
michael@0:           this._addDownloadData(null, aContainer.getChild(i), false,
michael@0:                                 elementsToAppendFragment);
michael@0:         }
michael@0:         catch(ex) {
michael@0:           Cu.reportError(ex);
michael@0:         }
michael@0:       }
michael@0: 
michael@0:       // _addDownloadData may not add new elements if there were already
michael@0:       // data items in place.
michael@0:       if (elementsToAppendFragment.firstChild) {
michael@0:         this._appendDownloadsFragment(elementsToAppendFragment);
michael@0:         this._ensureVisibleElementsAreActive();
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     goUpdateDownloadCommands();
michael@0:   },
michael@0: 
michael@0:   _appendDownloadsFragment: function DPV__appendDownloadsFragment(aDOMFragment) {
michael@0:     // Workaround multiple reflows hang by removing the richlistbox
michael@0:     // and adding it back when we're done.
michael@0: 
michael@0:     // Hack for bug 836283: reset xbl fields to their old values after the
michael@0:     // binding is reattached to avoid breaking the selection state
michael@0:     let xblFields = new Map();
michael@0:     for (let [key, value] in Iterator(this._richlistbox)) {
michael@0:       xblFields.set(key, value);
michael@0:     }
michael@0: 
michael@0:     let parentNode = this._richlistbox.parentNode;
michael@0:     let nextSibling = this._richlistbox.nextSibling;
michael@0:     parentNode.removeChild(this._richlistbox);
michael@0:     this._richlistbox.appendChild(aDOMFragment);
michael@0:     parentNode.insertBefore(this._richlistbox, nextSibling);
michael@0: 
michael@0:     for (let [key, value] of xblFields) {
michael@0:       this._richlistbox[key] = value;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   nodeInserted: function DPV_nodeInserted(aParent, aPlacesNode) {
michael@0:     this._addDownloadData(null, aPlacesNode);
michael@0:   },
michael@0: 
michael@0:   nodeRemoved: function DPV_nodeRemoved(aParent, aPlacesNode, aOldIndex) {
michael@0:     this._removeHistoryDownloadFromView(aPlacesNode);
michael@0:   },
michael@0: 
michael@0:   nodeIconChanged: function DPV_nodeIconChanged(aNode) {
michael@0:     this._forEachDownloadElementShellForURI(aNode.uri, function(aDownloadElementShell) {
michael@0:       aDownloadElementShell.placesNodeIconChanged();
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   nodeAnnotationChanged: function DPV_nodeAnnotationChanged(aNode, aAnnoName) {
michael@0:     this._forEachDownloadElementShellForURI(aNode.uri, function(aDownloadElementShell) {
michael@0:       aDownloadElementShell.placesNodeAnnotationChanged(aAnnoName);
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   nodeTitleChanged: function DPV_nodeTitleChanged(aNode, aNewTitle) {
michael@0:     this._forEachDownloadElementShellForURI(aNode.uri, function(aDownloadElementShell) {
michael@0:       aDownloadElementShell.placesNodeTitleChanged();
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   nodeKeywordChanged: function() {},
michael@0:   nodeDateAddedChanged: function() {},
michael@0:   nodeLastModifiedChanged: function() {},
michael@0:   nodeHistoryDetailsChanged: function() {},
michael@0:   nodeTagsChanged: function() {},
michael@0:   sortingChanged: function() {},
michael@0:   nodeMoved: function() {},
michael@0:   nodeURIChanged: function() {},
michael@0:   batching: function() {},
michael@0: 
michael@0:   get controller() this._richlistbox.controller,
michael@0: 
michael@0:   get searchTerm() this._searchTerm,
michael@0:   set searchTerm(aValue) {
michael@0:     if (this._searchTerm != aValue) {
michael@0:       for (let element of this._richlistbox.childNodes) {
michael@0:         element.hidden = !element._shell.matchesSearchTerm(aValue);
michael@0:       }
michael@0:       this._ensureVisibleElementsAreActive();
michael@0:     }
michael@0:     return this._searchTerm = aValue;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * When the view loads, we want to select the first item.
michael@0:    * However, because session downloads, for which the data is loaded
michael@0:    * asynchronously, always come first in the list, and because the list
michael@0:    * may (or may not) already contain history downloads at that point, it
michael@0:    * turns out that by the time we can select the first item, the user may
michael@0:    * have already started using the view.
michael@0:    * To make things even more complicated, in other cases, the places data
michael@0:    * may be loaded after the session downloads data.  Thus we cannot rely on
michael@0:    * the order in which the data comes in.
michael@0:    * We work around this by attempting to select the first element twice,
michael@0:    * once after the places data is loaded and once when the session downloads
michael@0:    * data is done loading.  However, if the selection has changed in-between,
michael@0:    * we assume the user has already started using the view and give up.
michael@0:    */
michael@0:   _ensureInitialSelection: function DPV__ensureInitialSelection() {
michael@0:     // Either they're both null, or the selection has not changed in between.
michael@0:     if (this._richlistbox.selectedItem == this._initiallySelectedElement) {
michael@0:       let firstDownloadElement = this._richlistbox.firstChild;
michael@0:       if (firstDownloadElement != this._initiallySelectedElement) {
michael@0:         // We may be called before _ensureVisibleElementsAreActive,
michael@0:         // or before the download binding is attached. Therefore, ensure the
michael@0:         // first item is activated, and pass the item to the richlistbox
michael@0:         // setters only at a point we know for sure the binding is attached.
michael@0:         firstDownloadElement._shell.ensureActive();
michael@0:         Services.tm.mainThread.dispatch(function() {
michael@0:           this._richlistbox.selectedItem = firstDownloadElement;
michael@0:           this._richlistbox.currentItem = firstDownloadElement;
michael@0:           this._initiallySelectedElement = firstDownloadElement;
michael@0:         }.bind(this), Ci.nsIThread.DISPATCH_NORMAL);
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   onDataLoadStarting: function() { },
michael@0:   onDataLoadCompleted: function DPV_onDataLoadCompleted() {
michael@0:     this._ensureInitialSelection();
michael@0:   },
michael@0: 
michael@0:   onDataItemAdded: function DPV_onDataItemAdded(aDataItem, aNewest) {
michael@0:     this._addDownloadData(aDataItem, null, aNewest);
michael@0:   },
michael@0: 
michael@0:   onDataItemRemoved: function DPV_onDataItemRemoved(aDataItem) {
michael@0:     this._removeSessionDownloadFromView(aDataItem);
michael@0:   },
michael@0: 
michael@0:   getViewItem: function(aDataItem)
michael@0:     this._viewItemsForDataItems.get(aDataItem, null),
michael@0: 
michael@0:   supportsCommand: function DPV_supportsCommand(aCommand) {
michael@0:     if (DOWNLOAD_VIEW_SUPPORTED_COMMANDS.indexOf(aCommand) != -1) {
michael@0:       // The clear-downloads command may be performed by the toolbar-button,
michael@0:       // which can be focused on OS X.  Thus enable this command even if the
michael@0:       // richlistbox is not focused.
michael@0:       // For other commands, be prudent and disable them unless the richlistview
michael@0:       // is focused. It's important to make the decision here rather than in
michael@0:       // isCommandEnabled.  Otherwise our controller may "steal" commands from
michael@0:       // other controls in the window (see goUpdateCommand &
michael@0:       // getControllerForCommand).
michael@0:       if (document.activeElement == this._richlistbox ||
michael@0:           aCommand == "downloadsCmd_clearDownloads") {
michael@0:         return true;
michael@0:       }
michael@0:     }
michael@0:     return false;
michael@0:   },
michael@0: 
michael@0:   isCommandEnabled: function DPV_isCommandEnabled(aCommand) {
michael@0:     switch (aCommand) {
michael@0:       case "cmd_copy":
michael@0:         return this._richlistbox.selectedItems.length > 0;
michael@0:       case "cmd_selectAll":
michael@0:         return true;
michael@0:       case "cmd_paste":
michael@0:         return this._canDownloadClipboardURL();
michael@0:       case "downloadsCmd_clearDownloads":
michael@0:         return this._canClearDownloads();
michael@0:       default:
michael@0:         return Array.every(this._richlistbox.selectedItems, function(element) {
michael@0:           return element._shell.isCommandEnabled(aCommand);
michael@0:         });
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _canClearDownloads: function DPV__canClearDownloads() {
michael@0:     // Downloads can be cleared if there's at least one removeable download in
michael@0:     // the list (either a history download or a completed session download).
michael@0:     // Because history downloads are always removable and are listed after the
michael@0:     // session downloads, check from bottom to top.
michael@0:     for (let elt = this._richlistbox.lastChild; elt; elt = elt.previousSibling) {
michael@0:       if (elt._shell.placesNode || !elt._shell.dataItem.inProgress)
michael@0:         return true;
michael@0:     }
michael@0:     return false;
michael@0:   },
michael@0: 
michael@0:   _copySelectedDownloadsToClipboard:
michael@0:   function DPV__copySelectedDownloadsToClipboard() {
michael@0:     let selectedElements = this._richlistbox.selectedItems;
michael@0:     let urls = [e._shell.downloadURI for each (e in selectedElements)];
michael@0: 
michael@0:     Cc["@mozilla.org/widget/clipboardhelper;1"].
michael@0:     getService(Ci.nsIClipboardHelper).copyString(urls.join("\n"), document);
michael@0:   },
michael@0: 
michael@0:   _getURLFromClipboardData: function DPV__getURLFromClipboardData() {
michael@0:     let trans = Cc["@mozilla.org/widget/transferable;1"].
michael@0:                 createInstance(Ci.nsITransferable);
michael@0:     trans.init(null);
michael@0: 
michael@0:     let flavors = ["text/x-moz-url", "text/unicode"];
michael@0:     flavors.forEach(trans.addDataFlavor);
michael@0: 
michael@0:     Services.clipboard.getData(trans, Services.clipboard.kGlobalClipboard);
michael@0: 
michael@0:     // Getting the data or creating the nsIURI might fail.
michael@0:     try {
michael@0:       let data = {};
michael@0:       trans.getAnyTransferData({}, data, {});
michael@0:       let [url, name] = data.value.QueryInterface(Ci.nsISupportsString)
michael@0:                             .data.split("\n");
michael@0:       if (url)
michael@0:         return [NetUtil.newURI(url, null, null).spec, name];
michael@0:     }
michael@0:     catch(ex) { }
michael@0: 
michael@0:     return ["", ""];
michael@0:   },
michael@0: 
michael@0:   _canDownloadClipboardURL: function DPV__canDownloadClipboardURL() {
michael@0:     let [url, name] = this._getURLFromClipboardData();
michael@0:     return url != "";
michael@0:   },
michael@0: 
michael@0:   _downloadURLFromClipboard: function DPV__downloadURLFromClipboard() {
michael@0:     let [url, name] = this._getURLFromClipboardData();
michael@0:     let browserWin = RecentWindow.getMostRecentBrowserWindow();
michael@0:     let initiatingDoc = browserWin ? browserWin.document : document;
michael@0:     DownloadURL(url, name, initiatingDoc);
michael@0:   },
michael@0: 
michael@0:   doCommand: function DPV_doCommand(aCommand) {
michael@0:     switch (aCommand) {
michael@0:       case "cmd_copy":
michael@0:         this._copySelectedDownloadsToClipboard();
michael@0:         break;
michael@0:       case "cmd_selectAll":
michael@0:         this._richlistbox.selectAll();
michael@0:         break;
michael@0:       case "cmd_paste":
michael@0:         this._downloadURLFromClipboard();
michael@0:         break;
michael@0:       case "downloadsCmd_clearDownloads":
michael@0:         this._downloadsData.removeFinished();
michael@0:         if (this.result) {
michael@0:           Cc["@mozilla.org/browser/download-history;1"]
michael@0:             .getService(Ci.nsIDownloadHistory)
michael@0:             .removeAllDownloads();
michael@0:         }
michael@0:         // There may be no selection or focus change as a result
michael@0:         // of these change, and we want the command updated immediately.
michael@0:         goUpdateCommand("downloadsCmd_clearDownloads");
michael@0:         break;
michael@0:       default: {
michael@0:         // Slicing the array to get a freezed list of selected items. Otherwise,
michael@0:         // the selectedItems array is live and doCommand may alter the selection
michael@0:         // while we are trying to do one particular action, like removing items
michael@0:         // from history.
michael@0:         let selectedElements = this._richlistbox.selectedItems.slice();
michael@0:         for (let element of selectedElements) {
michael@0:           element._shell.doCommand(aCommand);
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   onEvent: function() { },
michael@0: 
michael@0:   onContextMenu: function DPV_onContextMenu(aEvent)
michael@0:   {
michael@0:     let element = this._richlistbox.selectedItem;
michael@0:     if (!element || !element._shell)
michael@0:       return false;
michael@0: 
michael@0:     // Set the state attribute so that only the appropriate items are displayed.
michael@0:     let contextMenu = document.getElementById("downloadsContextMenu");
michael@0:     let state = element._shell.getDownloadMetaData().state;
michael@0:     if (state !== undefined)
michael@0:       contextMenu.setAttribute("state", state);
michael@0:     else
michael@0:       contextMenu.removeAttribute("state");
michael@0: 
michael@0:     if (state == nsIDM.DOWNLOAD_DOWNLOADING) {
michael@0:       // The resumable property of a download may change at any time, so
michael@0:       // ensure we update the related command now.
michael@0:       goUpdateCommand("downloadsCmd_pauseResume");
michael@0:     }
michael@0:     return true;
michael@0:   },
michael@0: 
michael@0:   onKeyPress: function DPV_onKeyPress(aEvent) {
michael@0:     let selectedElements = this._richlistbox.selectedItems;
michael@0:     if (aEvent.keyCode == KeyEvent.DOM_VK_RETURN) {
michael@0:       // In the content tree, opening bookmarks by pressing return is only
michael@0:       // supported when a single item is selected. To be consistent, do the
michael@0:       // same here.
michael@0:       if (selectedElements.length == 1) {
michael@0:         let element = selectedElements[0];
michael@0:         if (element._shell)
michael@0:           element._shell.doDefaultCommand();
michael@0:       }
michael@0:     }
michael@0:     else if (aEvent.charCode == " ".charCodeAt(0)) {
michael@0:       // Pausue/Resume every selected download
michael@0:       for (let element of selectedElements) {
michael@0:         if (element._shell.isCommandEnabled("downloadsCmd_pauseResume"))
michael@0:           element._shell.doCommand("downloadsCmd_pauseResume");
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   onDoubleClick: function DPV_onDoubleClick(aEvent) {
michael@0:     if (aEvent.button != 0)
michael@0:       return;
michael@0: 
michael@0:     let selectedElements = this._richlistbox.selectedItems;
michael@0:     if (selectedElements.length != 1)
michael@0:       return;
michael@0: 
michael@0:     let element = selectedElements[0];
michael@0:     if (element._shell)
michael@0:       element._shell.doDefaultCommand();
michael@0:   },
michael@0: 
michael@0:   onScroll: function DPV_onScroll() {
michael@0:     this._ensureVisibleElementsAreActive();
michael@0:   },
michael@0: 
michael@0:   onSelect: function DPV_onSelect() {
michael@0:     goUpdateDownloadCommands();
michael@0: 
michael@0:     let selectedElements = this._richlistbox.selectedItems;
michael@0:     for (let elt of selectedElements) {
michael@0:       if (elt._shell)
michael@0:         elt._shell.onSelect();
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   onDragStart: function DPV_onDragStart(aEvent) {
michael@0:     // TODO Bug 831358: Support d&d for multiple selection.
michael@0:     // For now, we just drag the first element.
michael@0:     let selectedItem = this._richlistbox.selectedItem;
michael@0:     if (!selectedItem)
michael@0:       return;
michael@0: 
michael@0:     let metaData = selectedItem._shell.getDownloadMetaData();
michael@0:     if (!("filePath" in metaData))
michael@0:       return;
michael@0:     let file = new FileUtils.File(metaData.filePath);
michael@0:     if (!file.exists())
michael@0:       return;
michael@0: 
michael@0:     let dt = aEvent.dataTransfer;
michael@0:     dt.mozSetDataAt("application/x-moz-file", file, 0);
michael@0:     let url = Services.io.newFileURI(file).spec;
michael@0:     dt.setData("text/uri-list", url);
michael@0:     dt.setData("text/plain", url);
michael@0:     dt.effectAllowed = "copyMove";
michael@0:     dt.addElement(selectedItem);
michael@0:   },
michael@0: 
michael@0:   onDragOver: function DPV_onDragOver(aEvent) {
michael@0:     let types = aEvent.dataTransfer.types;
michael@0:     if (types.contains("text/uri-list") ||
michael@0:         types.contains("text/x-moz-url") ||
michael@0:         types.contains("text/plain")) {
michael@0:       aEvent.preventDefault();
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   onDrop: function DPV_onDrop(aEvent) {
michael@0:     let dt = aEvent.dataTransfer;
michael@0:     // If dragged item is from our source, do not try to
michael@0:     // redownload already downloaded file.
michael@0:     if (dt.mozGetDataAt("application/x-moz-file", 0))
michael@0:       return;
michael@0: 
michael@0:     let name = { };
michael@0:     let url = Services.droppedLinkHandler.dropLink(aEvent, name);
michael@0:     if (url) {
michael@0:       let browserWin = RecentWindow.getMostRecentBrowserWindow();
michael@0:       let initiatingDoc = browserWin ? browserWin.document : document;
michael@0:       DownloadURL(url, name.value, initiatingDoc);
michael@0:     }
michael@0:   }
michael@0: };
michael@0: 
michael@0: for (let methodName of ["load", "applyFilter", "selectNode", "selectItems"]) {
michael@0:   DownloadsPlacesView.prototype[methodName] = function() {
michael@0:     throw new Error("|" + methodName + "| is not implemented by the downloads view.");
michael@0:   }
michael@0: }
michael@0: 
michael@0: function goUpdateDownloadCommands() {
michael@0:   for (let command of DOWNLOAD_VIEW_SUPPORTED_COMMANDS) {
michael@0:     goUpdateCommand(command);
michael@0:   }
michael@0: }