michael@0: // -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
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
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: const URI_GENERIC_ICON_DOWNLOAD = "chrome://browser/skin/images/alert-downloads-30.png";
michael@0: 
michael@0: var MetroDownloadsView = {
michael@0:   /**
michael@0:    * _downloadCount keeps track of the number of downloads that a single
michael@0:    * notification bar groups together. A download is grouped with other
michael@0:    * downloads if it starts before other downloads have completed.
michael@0:    */
michael@0:   _downloadCount: 0,
michael@0:   _downloadsInProgress: 0,
michael@0:   _lastDownload: null,
michael@0:   _inited: false,
michael@0:   _progressAlert: null,
michael@0:   _lastSec: Infinity,
michael@0: 
michael@0:   _progressNotificationInfo: new Map(),
michael@0:   _runDownloadBooleanMap: new Map(),
michael@0: 
michael@0:   get manager() {
michael@0:     return Cc["@mozilla.org/download-manager;1"]
michael@0:              .getService(Ci.nsIDownloadManager);
michael@0:   },
michael@0: 
michael@0:   _getReferrerOrSource: function dh__getReferrerOrSource(aDownload) {
michael@0:     return aDownload.referrer.spec || aDownload.source.spec;
michael@0:   },
michael@0: 
michael@0:   _getLocalFile: function dh__getLocalFile(aFileURI) {
michael@0:     // XXX it's possible that using a null char-set here is bad
michael@0:     let spec = ('string' == typeof aFileURI) ? aFileURI : aFileURI.spec;
michael@0:     let fileUrl;
michael@0:     try {
michael@0:       fileUrl = Services.io.newURI(spec, null, null).QueryInterface(Ci.nsIFileURL);
michael@0:     } catch (ex) {
michael@0:       Util.dumpLn("_getLocalFile: Caught exception creating newURI from file spec: "+aFileURI.spec+": " + ex.message);
michael@0:       return;
michael@0:     }
michael@0:     return fileUrl.file.clone().QueryInterface(Ci.nsILocalFile);
michael@0:   },
michael@0: 
michael@0:   init: function dh_init() {
michael@0:     if (this._inited)
michael@0:       return;
michael@0: 
michael@0:     this._inited = true;
michael@0: 
michael@0:     Services.obs.addObserver(this, "dl-start", true);
michael@0:     Services.obs.addObserver(this, "dl-done", true);
michael@0:     Services.obs.addObserver(this, "dl-run", true);
michael@0:     Services.obs.addObserver(this, "dl-failed", true);
michael@0: 
michael@0: 
michael@0:     this._progress = new DownloadProgressListener(this);
michael@0:     this.manager.addListener(this._progress);
michael@0: 
michael@0:     Elements.tabList.addEventListener("TabClose", this, false);
michael@0: 
michael@0:     this._downloadProgressIndicator = document.getElementById("download-progress");
michael@0: 
michael@0:     if (this.manager.activeDownloadCount) {
michael@0:       setTimeout (this._restartWithActiveDownloads.bind(this), 0);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   uninit: function dh_uninit() {
michael@0:     if (this._inited) {
michael@0:       Services.obs.removeObserver(this, "dl-start");
michael@0:       Services.obs.removeObserver(this, "dl-done");
michael@0:       Services.obs.removeObserver(this, "dl-run");
michael@0:       Services.obs.removeObserver(this, "dl-failed");
michael@0:       if (Elements && Elements.tabList)
michael@0:         Elements.tabList.removeEventListener("TabClose", this);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   get _notificationBox() {
michael@0:     return Browser.getNotificationBox(Browser.selectedBrowser);
michael@0:   },
michael@0: 
michael@0:   get _notificationBoxes() {
michael@0:     let currentBox = this._notificationBox;
michael@0:     let boxes = [
michael@0:       currentBox
michael@0:     ];
michael@0:     for (let { linkedBrowser } of Elements.tabList.children) {
michael@0:       if (linkedBrowser !== Browser.selectedBrowser) {
michael@0:         let notificationBox = Browser.getNotificationBox(linkedBrowser);
michael@0:         if (notificationBox)
michael@0:           boxes.push(notificationBox);
michael@0:       }
michael@0:     }
michael@0:     return boxes;
michael@0:   },
michael@0: 
michael@0:   get _progressNotification() {
michael@0:     let notn = this._getNotificationWithValue("download-progress");
michael@0:     let currentBox = this._notificationBox;
michael@0:     // move the progress notification if attached to a different browser
michael@0:     if (notn && notn.parentNode !== currentBox) {
michael@0:       notn.parentNode.removeNotification(notn);
michael@0:       currentBox.insertBefore(notn, currentBox.firstChild);
michael@0:     }
michael@0:     return notn;
michael@0:   },
michael@0: 
michael@0:   _getNotificationWithValue: function(aValue) {
michael@0:     let notn;
michael@0:     let allNotificationBoxes = this._notificationBoxes;
michael@0:     for(let box of allNotificationBoxes) {
michael@0:       notn = box.getNotificationWithValue(aValue);
michael@0:       if (notn) {
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0:     return notn;
michael@0:   },
michael@0: 
michael@0:    _restartWithActiveDownloads: function() {
michael@0:     let activeDownloads = this.manager.activeDownloads;
michael@0: 
michael@0:     while (activeDownloads.hasMoreElements()) {
michael@0:       let dl = activeDownloads.getNext();
michael@0:       switch (dl.state) {
michael@0:         case 0: // Downloading
michael@0:         case 5: // Queued
michael@0:           this.watchDownload(dl);
michael@0:           this.updateInfobar();
michael@0:           break;
michael@0:       }
michael@0:     }
michael@0:     if (this.manager.activeDownloadCount) {
michael@0:       ContextUI.displayNavbar();
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   openDownload: function dh_openDownload(aDownload) {
michael@0:     let fileURI = aDownload.target
michael@0: 
michael@0:     if (!(fileURI && fileURI.spec)) {
michael@0:       Util.dumpLn("Cant open download "+id+", fileURI is invalid");
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     let file = this._getLocalFile(fileURI);
michael@0:     try {
michael@0:       file && Services.metro.launchInDesktop(aDownload.target.spec, "");
michael@0:     } catch (ex) {
michael@0:       Util.dumpLn("Failed to open download, with id: "+id+", download target URI spec: " + fileURI.spec);
michael@0:       Util.dumpLn("Failed download source:"+(aDownload.source && aDownload.source.spec));
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   removeDownload: function dh_removeDownload(aDownload) {
michael@0:     // aDownload is the XUL element here,
michael@0:     // and .target currently returns the target attribute (string value)
michael@0:     let id = aDownload.getAttribute("downloadId");
michael@0:     let download = this.manager.getDownload(id);
michael@0: 
michael@0:     if (download) {
michael@0:       this.manager.removeDownload(id);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   cancelDownload: function dh_cancelDownload(aDownload) {
michael@0:     let fileURI = aDownload.target;
michael@0:     if (!(fileURI && fileURI.spec)) {
michael@0:       Util.dumpLn("Cant remove download file for: "+aDownload.id+", fileURI is invalid");
michael@0:     }
michael@0: 
michael@0:     try {
michael@0:       let file = this._getLocalFile(fileURI);
michael@0:       if (file && file.exists())
michael@0:         file.remove(false);
michael@0:       this.manager.cancelDownload(aDownload.id);
michael@0: 
michael@0:       // If cancelling was successful, stop tracking the download.
michael@0:       this._progressNotificationInfo.delete(aDownload.guid);
michael@0:       this._runDownloadBooleanMap.delete(aDownload.targetFile.path);
michael@0:       this._downloadCount--;
michael@0:       this._downloadsInProgress--;
michael@0:       let notn = this._progressNotification;
michael@0:       if (notn && this._downloadsInProgress <= 0) {
michael@0:         this._notificationBox.removeNotification(notn);
michael@0:       }
michael@0:     } catch (ex) {
michael@0:       Util.dumpLn("Failed to cancel download, with id: "+aDownload.id+", download target URI spec: " + fileURI.spec);
michael@0:       Util.dumpLn("Failed download source:"+(aDownload.source && aDownload.source.spec));
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   // Cancels all downloads.
michael@0:   cancelDownloads: function dh_cancelDownloads() {
michael@0:     for (let [guid, info] of this._progressNotificationInfo) {
michael@0:       this.cancelDownload(info.download);
michael@0:     }
michael@0:     this._downloadCount = 0;
michael@0:     this._progressNotificationInfo.clear();
michael@0:     this._runDownloadBooleanMap.clear();
michael@0:   },
michael@0: 
michael@0:   pauseDownload: function dh_pauseDownload(aDownload) {
michael@0:     let id = aDownload.getAttribute("downloadId");
michael@0:     this.manager.pauseDownload(id);
michael@0:   },
michael@0: 
michael@0:   resumeDownload: function dh_resumeDownload(aDownload) {
michael@0:     let id = aDownload.getAttribute("downloadId");
michael@0:     this.manager.resumeDownload(id);
michael@0:   },
michael@0: 
michael@0:   showPage: function dh_showPage(aDownload) {
michael@0:     let id = aDownload.getAttribute("downloadId");
michael@0:     let download = this.manager.getDownload(id);
michael@0:     let uri = this._getReferrerOrSource(download);
michael@0:     if (uri)
michael@0:       BrowserUI.addAndShowTab(uri, Browser.selectedTab);
michael@0:   },
michael@0: 
michael@0:   showAlert: function dh_showAlert(aName, aMessage, aTitle, aObserver) {
michael@0:     var notifier = Cc["@mozilla.org/alerts-service;1"]
michael@0:                      .getService(Ci.nsIAlertsService);
michael@0: 
michael@0:     if (!aTitle)
michael@0:       aTitle = Strings.browser.GetStringFromName("alertDownloads");
michael@0: 
michael@0:     notifier.showAlertNotification("", aTitle, aMessage, true, "", aObserver, aName);
michael@0:   },
michael@0: 
michael@0:   showNotification: function dh_showNotification(title, msg, buttons, priority) {
michael@0:     let notification = this._notificationBox.appendNotification(msg,
michael@0:                                               title,
michael@0:                                               URI_GENERIC_ICON_DOWNLOAD,
michael@0:                                               priority,
michael@0:                                               buttons);
michael@0:     return notification;
michael@0:   },
michael@0: 
michael@0:   _showDownloadFailedNotification: function (aDownload) {
michael@0:     let tryAgainButtonText =
michael@0:       Strings.browser.GetStringFromName("downloadTryAgain");
michael@0:     let cancelButtonText =
michael@0:       Strings.browser.GetStringFromName("downloadCancel");
michael@0: 
michael@0:     let message = Strings.browser.formatStringFromName("alertDownloadFailed",
michael@0:       [aDownload.displayName], 1);
michael@0: 
michael@0:     let buttons = [
michael@0:       {
michael@0:         isDefault: true,
michael@0:         label: tryAgainButtonText,
michael@0:         accessKey: "",
michael@0:         callback: function() {
michael@0:           MetroDownloadsView.manager.retryDownload(aDownload.id);
michael@0:         }
michael@0:       },
michael@0:       {
michael@0:         label: cancelButtonText,
michael@0:         accessKey: "",
michael@0:         callback: function() {
michael@0:           MetroDownloadsView.cancelDownload(aDownload);
michael@0:           MetroDownloadsView._downloadProgressIndicator.reset();
michael@0:         }
michael@0:       }
michael@0:     ];
michael@0:     this.showNotification("download-failed", message, buttons,
michael@0:       this._notificationBox.PRIORITY_WARNING_HIGH);
michael@0:   },
michael@0: 
michael@0:   _showDownloadCompleteNotification: function () {
michael@0:     let message = "";
michael@0:     let showInFilesButtonText = Strings.browser.GetStringFromName("downloadShowInFiles");
michael@0: 
michael@0:     let buttons = [
michael@0:       {
michael@0:         label: showInFilesButtonText,
michael@0:         accessKey: "",
michael@0:         callback: function() {
michael@0:           let fileURI = MetroDownloadsView._lastDownload.target;
michael@0:           let file = MetroDownloadsView._getLocalFile(fileURI);
michael@0:           file.reveal();
michael@0:           MetroDownloadsView._resetCompletedDownloads();
michael@0:         }
michael@0:       }
michael@0:     ];
michael@0: 
michael@0:     if (this._downloadCount > 1) {
michael@0:       message = PluralForm.get(this._downloadCount,
michael@0:                                Strings.browser.GetStringFromName("alertMultipleDownloadsComplete"))
michael@0:                                .replace("#1", this._downloadCount)
michael@0:     } else {
michael@0:       let runButtonText =
michael@0:         Strings.browser.GetStringFromName("downloadOpen");
michael@0:       message = Strings.browser.formatStringFromName("alertDownloadsDone2",
michael@0:         [this._lastDownload.displayName], 1);
michael@0: 
michael@0:       buttons.unshift({
michael@0:         isDefault: true,
michael@0:         label: runButtonText,
michael@0:         accessKey: "",
michael@0:         callback: function() {
michael@0:           MetroDownloadsView.openDownload(MetroDownloadsView._lastDownload);
michael@0:           MetroDownloadsView._resetCompletedDownloads();
michael@0:         }
michael@0:       });
michael@0:     }
michael@0:     this._removeNotification("download-complete");
michael@0:     this.showNotification("download-complete", message, buttons,
michael@0:       this._notificationBox.PRIORITY_WARNING_MEDIUM);
michael@0:   },
michael@0: 
michael@0:   _showDownloadCompleteToast: function () {
michael@0:     let name = "DownloadComplete";
michael@0:     let msg = "";
michael@0:     let title = "";
michael@0:     let observer = null;
michael@0:     if (this._downloadCount > 1) {
michael@0:       title = PluralForm.get(this._downloadCount,
michael@0:                              Strings.browser.GetStringFromName("alertMultipleDownloadsComplete"))
michael@0:                              .replace("#1", this._downloadCount)
michael@0:       msg = PluralForm.get(2, Strings.browser.GetStringFromName("downloadShowInFiles"));
michael@0: 
michael@0:       observer = {
michael@0:         observe: function (aSubject, aTopic, aData) {
michael@0:           switch (aTopic) {
michael@0:             case "alertclickcallback":
michael@0:               let fileURI = MetroDownloadsView._lastDownload.target;
michael@0:               let file = MetroDownloadsView._getLocalFile(fileURI);
michael@0:               file.reveal();
michael@0:               MetroDownloadsView._resetCompletedDownloads();
michael@0:               break;
michael@0:           }
michael@0:         }
michael@0:       }
michael@0:     } else {
michael@0:       title = Strings.browser.formatStringFromName("alertDownloadsDone",
michael@0:         [this._lastDownload.displayName], 1);
michael@0:       msg = Strings.browser.GetStringFromName("downloadOpenNow");
michael@0:       observer = {
michael@0:         observe: function (aSubject, aTopic, aData) {
michael@0:           switch (aTopic) {
michael@0:             case "alertclickcallback":
michael@0:               MetroDownloadsView.openDownload(MetroDownloadsView._lastDownload);
michael@0:               MetroDownloadsView._resetCompletedDownloads();
michael@0:               break;
michael@0:           }
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:     this.showAlert(name, msg, title, observer);
michael@0:   },
michael@0: 
michael@0:   _resetCompletedDownloads: function () {
michael@0:     this._progressNotificationInfo.clear();
michael@0:     this._downloadCount = 0;
michael@0:     this._lastDownload = null;
michael@0:     this._downloadProgressIndicator.reset();
michael@0:     this._removeNotification("download-complete");
michael@0:   },
michael@0: 
michael@0:   _updateCircularProgressMeter: function dv_updateCircularProgressMeter() {
michael@0:     if (!this._progressNotificationInfo) {
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     let totPercent = 0;
michael@0:     for (let [guid, info] of this._progressNotificationInfo) {
michael@0:       // info.download => nsIDownload
michael@0:       totPercent += info.download.percentComplete;
michael@0:     }
michael@0: 
michael@0:     let percentComplete = totPercent / this._progressNotificationInfo.size;
michael@0:     this._downloadProgressIndicator.updateProgress(percentComplete);
michael@0:   },
michael@0: 
michael@0:   _computeDownloadProgressString: function dv_computeDownloadProgressString() {
michael@0:     let totTransferred = 0, totSize = 0, totSecondsLeft = 0;
michael@0:     let guid, info;
michael@0:     for ([guid, info] of this._progressNotificationInfo) {
michael@0:       let size = info.download.size;
michael@0:       let amountTransferred = info.download.amountTransferred;
michael@0:       let speed = info.download.speed;
michael@0: 
michael@0:       totTransferred += amountTransferred;
michael@0:       totSize += size;
michael@0:       totSecondsLeft += ((size - amountTransferred) / speed);
michael@0:     }
michael@0: 
michael@0:     // Compute progress in bytes.
michael@0:     let amountTransferred = Util.getDownloadSize(totTransferred);
michael@0:     let size = Util.getDownloadSize(totSize);
michael@0:     let progress = amountTransferred + "/" + size;
michael@0: 
michael@0:     // Compute progress in time.;
michael@0:     let [timeLeft, newLast] = DownloadUtils.getTimeLeft(totSecondsLeft, this._lastSec);
michael@0:     this._lastSec = newLast;
michael@0: 
michael@0:     if (this._downloadCount == 1) {
michael@0:       return Strings.browser.GetStringFromName("alertDownloadsStart2")
michael@0:         .replace("#1", info.download.displayName)
michael@0:         .replace("#2", progress)
michael@0:         .replace("#3", timeLeft)
michael@0:     }
michael@0: 
michael@0:     let numDownloads = this._downloadCount;
michael@0:     return PluralForm.get(numDownloads,
michael@0:                           Strings.browser.GetStringFromName("alertDownloadMultiple"))
michael@0:                           .replace("#1", numDownloads)
michael@0:                           .replace("#2", progress)
michael@0:                           .replace("#3", timeLeft);
michael@0:   },
michael@0: 
michael@0:   _saveDownloadData: function dv_saveDownloadData(aDownload) {
michael@0:     if (!this._progressNotificationInfo.get(aDownload.guid)) {
michael@0:       this._progressNotificationInfo.set(aDownload.guid, {});
michael@0:     }
michael@0:     let infoObj = this._progressNotificationInfo.get(aDownload.guid);
michael@0:     infoObj.download = aDownload;
michael@0:     this._progressNotificationInfo.set(aDownload.guid, infoObj);
michael@0:   },
michael@0: 
michael@0:   onDownloadButton: function dv_onDownloadButton() {
michael@0:     let progressNotification = this._getNotificationWithValue("download-progress");
michael@0:     let wasProgressVisible = (progressNotification &&
michael@0:                               progressNotification.parentNode == this._notificationBox);
michael@0:     let completeNotification = this._getNotificationWithValue("download-complete");
michael@0:     let wasCompleteVisible = (completeNotification &&
michael@0:                               completeNotification.parentNode == this._notificationBox);
michael@0: 
michael@0:     this._removeNotification("download-complete");
michael@0:     this._removeNotification("download-progress");
michael@0: 
michael@0:     if (this._downloadsInProgress && !wasProgressVisible) {
michael@0:       this.updateInfobar();
michael@0:     } else if (this._downloadCount && !wasCompleteVisible) {
michael@0:       this._showDownloadCompleteNotification();
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   _removeNotification: function (aValue) {
michael@0:     let notification = this._getNotificationWithValue(aValue);
michael@0:     return notification &&
michael@0:            notification.parentNode.removeNotification(notification);
michael@0:   },
michael@0: 
michael@0:   updateInfobar: function dv_updateInfobar() {
michael@0:     let message = this._computeDownloadProgressString();
michael@0:     this._updateCircularProgressMeter();
michael@0: 
michael@0:     let notn = this._progressNotification;
michael@0:     if (!notn) {
michael@0:       let cancelButtonText =
michael@0:               Strings.browser.GetStringFromName("downloadCancel");
michael@0: 
michael@0:       let buttons = [
michael@0:         {
michael@0:           isDefault: false,
michael@0:           label: cancelButtonText,
michael@0:           accessKey: "",
michael@0:           callback: function() {
michael@0:             MetroDownloadsView.cancelDownloads();
michael@0:             MetroDownloadsView._downloadProgressIndicator.reset();
michael@0:           }
michael@0:         }
michael@0:       ];
michael@0: 
michael@0:       notn = this.showNotification("download-progress", message, buttons,
michael@0:              this._notificationBox.PRIORITY_WARNING_LOW);
michael@0: 
michael@0:       ContextUI.displayNavbar();
michael@0:     } else {
michael@0:       notn.label = message;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   updateDownload: function dv_updateDownload(aDownload) {
michael@0:     this._saveDownloadData(aDownload);
michael@0:     let notn = this._progressNotification;
michael@0:     if (notn) {
michael@0:       notn.label =
michael@0:         this._computeDownloadProgressString(aDownload);
michael@0:     }
michael@0:     this._updateCircularProgressMeter();
michael@0:   },
michael@0: 
michael@0:   watchDownload: function dv_watchDownload(aDownload) {
michael@0:     this._saveDownloadData(aDownload);
michael@0:     this._downloadCount++;
michael@0:     this._downloadsInProgress++;
michael@0:     if (!this._progressNotificationInfo.get(aDownload.guid)) {
michael@0:       this._progressNotificationInfo.set(aDownload.guid, {});
michael@0:     }
michael@0:     if (!this._progressAlert) {
michael@0:       this._progressAlert = new AlertDownloadProgressListener();
michael@0:       this.manager.addListener(this._progressAlert);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   observe: function (aSubject, aTopic, aData) {
michael@0:     let message = "";
michael@0:     let msgTitle = "";
michael@0: 
michael@0:     switch (aTopic) {
michael@0:       case "dl-run":
michael@0:         let file = aSubject.QueryInterface(Ci.nsIFile);
michael@0:         this._runDownloadBooleanMap.set(file.path, (aData == 'true'));
michael@0:         break;
michael@0:       case "dl-start":
michael@0:         let download = aSubject.QueryInterface(Ci.nsIDownload);
michael@0:         this.watchDownload(download);
michael@0:         this.updateInfobar();
michael@0:         break;
michael@0:       case "dl-done":
michael@0:         this._downloadsInProgress--;
michael@0:         download = aSubject.QueryInterface(Ci.nsIDownload);
michael@0:         this._lastDownload = download;
michael@0:         let runAfterDownload = this._runDownloadBooleanMap.get(download.targetFile.path);
michael@0:         if (runAfterDownload) {
michael@0:           this.openDownload(download);
michael@0:         }
michael@0: 
michael@0:         this._runDownloadBooleanMap.delete(download.targetFile.path);
michael@0:         if (this._downloadsInProgress == 0) {
michael@0:           if (this._downloadCount > 1 || !runAfterDownload) {
michael@0:             this._showDownloadCompleteToast();
michael@0:             this._showDownloadCompleteNotification();
michael@0:           }
michael@0:           let notn = this._progressNotification;
michael@0:           if (notn)
michael@0:             this._notificationBox.removeNotification(notn);
michael@0: 
michael@0:           ContextUI.displayNavbar();
michael@0:         }
michael@0: 
michael@0:         this._downloadProgressIndicator.notify();
michael@0:         break;
michael@0:       case "dl-failed":
michael@0:         download = aSubject.QueryInterface(Ci.nsIDownload);
michael@0:         this._showDownloadFailedNotification(download);
michael@0:         break;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   handleEvent: function(aEvent) {
michael@0:     switch (aEvent.type) {
michael@0:       case 'TabClose': {
michael@0:         let browser = aEvent.originalTarget.linkedBrowser;
michael@0:         let tab = Browser.getTabForBrowser(browser);
michael@0:         let notificationBox = Browser.getNotificationBox(browser);
michael@0: 
michael@0:         // move any download-related notification before the tab and its notificationBox goes away
michael@0:         // The 3 possible values should be mutually exclusive
michael@0:         for(let name of ["download-progress",
michael@0:                         "save-download",
michael@0:                         "download-complete"]) {
michael@0:           let notn = notificationBox.getNotificationWithValue(name);
michael@0:           if (!notn) {
michael@0:             continue;
michael@0:           }
michael@0: 
michael@0:           let nextTab = Browser.getNextTab(tab);
michael@0:           let nextBox = nextTab && Browser.getNotificationBox(nextTab.browser);
michael@0:           if (nextBox) {
michael@0:             // move notification to the next tab
michael@0:             nextBox.adoptNotification(notn);
michael@0:           } else {
michael@0:             // Alas, no browser to move the notifications to.
michael@0:           }
michael@0:         }
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   QueryInterface: function (aIID) {
michael@0:     if (!aIID.equals(Ci.nsIObserver) &&
michael@0:         !aIID.equals(Ci.nsISupportsWeakReference) &&
michael@0:         !aIID.equals(Ci.nsISupports))
michael@0:       throw Components.results.NS_ERROR_NO_INTERFACE;
michael@0:     return this;
michael@0:   }
michael@0: };
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * Notifies Downloads object about updates in the state of various downloads.
michael@0:  *
michael@0:  * @param aDownloads An instance of Downloads.
michael@0:  */
michael@0: function DownloadProgressListener(aDownloads) {
michael@0:   this._downloads = aDownloads;
michael@0: }
michael@0: 
michael@0: DownloadProgressListener.prototype = {
michael@0:   _downloads: null,
michael@0: 
michael@0:   //////////////////////////////////////////////////////////////////////////////
michael@0:   //// nsIDownloadProgressListener
michael@0:   onDownloadStateChange: function dPL_onDownloadStateChange(aState, aDownload) {
michael@0:     // TODO: Use DownloadProgressListener instead of observers in the Downloads object.
michael@0:     this._downloads.updateDownload(aDownload);
michael@0:   },
michael@0: 
michael@0:   onProgressChange: function dPL_onProgressChange(aWebProgress, aRequest, aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress, aDownload) {
michael@0:     // TODO <jwilde>: Add more detailed progress information.
michael@0:     this._downloads.updateDownload(aDownload);
michael@0:   },
michael@0: 
michael@0:   onStateChange: function(aWebProgress, aRequest, aState, aStatus, aDownload) { },
michael@0:   onSecurityChange: function(aWebProgress, aRequest, aState, aDownload) { },
michael@0: 
michael@0:   //////////////////////////////////////////////////////////////////////////////
michael@0:   //// nsISupports
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsIDownloadProgressListener])
michael@0: };
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * Tracks download progress so that additional information can be displayed
michael@0:  * about its download in alert popups.
michael@0:  */
michael@0: function AlertDownloadProgressListener() { }
michael@0: 
michael@0: AlertDownloadProgressListener.prototype = {
michael@0:   //////////////////////////////////////////////////////////////////////////////
michael@0:   //// nsIDownloadProgressListener
michael@0:   onProgressChange: function(aWebProgress, aRequest, aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress, aDownload) {
michael@0:     let strings = Strings.browser;
michael@0:     let availableSpace = -1;
michael@0: 
michael@0:     try {
michael@0:       // diskSpaceAvailable is not implemented on all systems
michael@0:       let availableSpace = aDownload.targetFile.diskSpaceAvailable;
michael@0:     } catch(ex) { }
michael@0: 
michael@0:     let contentLength = aDownload.size;
michael@0:     if (availableSpace > 0 && contentLength > 0 && contentLength > availableSpace) {
michael@0:       MetroDownloadsView.showAlert(aDownload.target.spec.replace("file:", "download:"),
michael@0:                                    strings.GetStringFromName("alertDownloadsNoSpace"),
michael@0:                                    strings.GetStringFromName("alertDownloadsSize"));
michael@0:       MetroDownloadsView.cancelDownload(aDownload);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   onDownloadStateChange: function(aState, aDownload) { },
michael@0:   onStateChange: function(aWebProgress, aRequest, aState, aStatus, aDownload) { },
michael@0:   onSecurityChange: function(aWebProgress, aRequest, aState, aDownload) { },
michael@0: 
michael@0:   //////////////////////////////////////////////////////////////////////////////
michael@0:   //// nsISupports
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsIDownloadProgressListener])
michael@0: };