const PRINT_DOCUMENT_URI = "chrome://global/content/print.html"; const DEFAULT_PRINTER_NAME = "Mozilla Save to PDF"; const { MockFilePicker } = SpecialPowers; let pickerMocked = false; class PrintHelper { static async withTestPage(testFn, pagePathname, useHTTPS = false) { let pageUrl = ""; if (pagePathname) { pageUrl = useHTTPS ? this.getTestPageUrlHTTPS(pagePathname) : this.getTestPageUrl(pagePathname); } else { pageUrl = useHTTPS ? this.defaultTestPageUrlHTTPS : this.defaultTestPageUrl; } info("withTestPage: " + pageUrl); let isPdf = pageUrl.endsWith(".pdf"); let taskReturn = await BrowserTestUtils.withNewTab( isPdf ? "about:blank" : pageUrl, async function (browser) { if (isPdf) { let loaded = BrowserTestUtils.waitForContentEvent( browser, "documentloaded", false, null, true ); BrowserTestUtils.startLoadingURIString(browser, pageUrl); await loaded; } await testFn(new PrintHelper(browser)); } ); await SpecialPowers.popPrefEnv(); if (isPdf) { await SpecialPowers.popPrefEnv(); } // Reset all of the other printing prefs to their default. this.resetPrintPrefs(); return taskReturn; } static async withTestPageHTTPS(testFn, pagePathname) { return this.withTestPage(testFn, pagePathname, /* useHttps */ true); } static resetPrintPrefs() { for (let name of Services.prefs.getChildList("print.")) { Services.prefs.clearUserPref(name); } Services.prefs.clearUserPref("print_printer"); Services.prefs.clearUserPref("print.more-settings.open"); } static getTestPageUrl(pathName) { const testPath = getRootDirectory(gTestPath).replace( "chrome://mochitests/content", "http://example.com" ); return testPath + pathName; } static getTestPageUrlHTTPS(pathName) { const testPath = getRootDirectory(gTestPath).replace( "chrome://mochitests/content", "https://example.com" ); return testPath + pathName; } static get defaultTestPageUrl() { return this.getTestPageUrl("simplifyArticleSample.html"); } static get defaultTestPageUrlHTTPS() { return this.getTestPageUrlHTTPS("simplifyArticleSample.html"); } static createMockPaper(paperProperties = {}) { return Object.assign( { id: "regular", name: "Regular Size", width: 612, height: 792, unwriteableMargin: Promise.resolve( paperProperties.unwriteableMargin || { top: 0.1, bottom: 0.1, left: 0.1, right: 0.1, QueryInterface: ChromeUtils.generateQI([Ci.nsIPaperMargin]), } ), QueryInterface: ChromeUtils.generateQI([Ci.nsIPaper]), }, paperProperties ); } constructor(sourceBrowser) { this.sourceBrowser = sourceBrowser; } async startPrint(condition = {}) { this.sourceBrowser.ownerGlobal.document .getElementById("cmd_print") .doCommand(); return this.waitForDialog(condition); } async waitForDialog(condition = {}) { let dialog = await TestUtils.waitForCondition( () => this.dialog, "Wait for dialog" ); await dialog._dialogReady; if (Object.keys(condition).length === 0) { await this.win._initialized; // Wait a frame so the rendering spinner is hidden. await new Promise(resolve => requestAnimationFrame(resolve)); } else if (condition.waitFor == "loadComplete") { await BrowserTestUtils.waitForAttributeRemoval("loading", this.doc.body); } } beforeInit(initFn) { // Run a function when the print.html document is created, // but before its init is called from the domcontentloaded handler TestUtils.topicObserved("document-element-inserted", doc => { return ( doc.nodePrincipal.isSystemPrincipal && doc.contentType == "text/html" && doc.URL.startsWith("chrome://global/content/print.html") ); }).then(([doc]) => { doc.addEventListener("DOMContentLoaded", () => { initFn(doc.ownerGlobal); }); }); } async withClosingFn(closeFn) { let { dialog } = this; await closeFn(); if (this.dialog) { await TestUtils.waitForCondition( () => !this.dialog, "Wait for dialog to close" ); } await dialog._closingPromise; } resetSettings() { this.win.PrintEventHandler.settings = this.win.PrintEventHandler.defaultSettings; this.win.PrintEventHandler.saveSettingsToPrefs( this.win.PrintEventHandler.kInitSaveAll ); } async closeDialog() { this.resetSettings(); await this.withClosingFn(() => this.dialog.close()); } assertDialogClosed() { is(this._dialogs.length, 0, "There are no print dialogs"); } assertDialogOpen() { is(this._dialogs.length, 1, "There is one print dialog"); ok(BrowserTestUtils.isVisible(this.dialog._box), "The dialog is visible"); } assertDialogHidden() { is(this._dialogs.length, 1, "There is one print dialog"); ok(BrowserTestUtils.isHidden(this.dialog._box), "The dialog is hidden"); Assert.greater( this.dialog._box.getBoundingClientRect().width, 0, "The dialog should still have boxes" ); } async assertPrintToFile(file, testFn) { ok(!file.exists(), "File does not exist before printing"); await this.withClosingFn(testFn); await TestUtils.waitForCondition( () => file.exists() && file.fileSize > 0, "Wait for target file to get created", 50 ); ok(file.exists(), "Created target file"); await TestUtils.waitForCondition( () => file.fileSize > 0, "Wait for the print progress to run", 50 ); Assert.greater(file.fileSize, 0, "Target file not empty"); } setupMockPrint() { if (this.resolveShowSystemDialog) { throw new Error("Print already mocked"); } // Create some Promises that we can resolve from the test. let showSystemDialogPromise = new Promise(resolve => { this.resolveShowSystemDialog = result => { if (result !== undefined) { resolve(result); } else { resolve(true); } }; }); let printPromise = new Promise((resolve, reject) => { this.resolvePrint = resolve; this.rejectPrint = reject; }); // Mock PrintEventHandler with our Promises. this.win.PrintEventHandler._showPrintDialog = ( window, haveSelection, settings ) => { this.systemDialogOpenedWithSelection = haveSelection; return showSystemDialogPromise; }; this.win.PrintEventHandler._doPrint = (bc, settings) => { this._printedSettings = settings; return printPromise; }; } addMockPrinter(opts = {}) { if (typeof opts == "string") { opts = { name: opts }; } let { name = "Mock Printer", paperList, printerInfoPromise = Promise.resolve(), paperSizeUnit = Ci.nsIPrintSettings.kPaperSizeInches, paperId, } = opts; let PSSVC = Cc["@mozilla.org/gfx/printsettings-service;1"].getService( Ci.nsIPrintSettingsService ); // Use the fallbackPaperList as the default for mock printers if (!paperList) { info("addMockPrinter, using the fallbackPaperList"); paperList = Cc["@mozilla.org/gfx/printerlist;1"].createInstance( Ci.nsIPrinterList ).fallbackPaperList; } let defaultSettings = PSSVC.createNewPrintSettings(); defaultSettings.printerName = name; defaultSettings.toFileName = ""; defaultSettings.outputFormat = Ci.nsIPrintSettings.kOutputFormatNative; defaultSettings.outputDestination = Ci.nsIPrintSettings.kOutputDestinationPrinter; defaultSettings.paperSizeUnit = paperSizeUnit; if (paperId) { defaultSettings.paperId = paperId; } if ( defaultSettings.paperId && Array.from(paperList).find(p => p.id == defaultSettings.paperId) ) { info( `addMockPrinter, using paperId: ${defaultSettings.paperId} from the paperList` ); } else if (paperList.length) { defaultSettings.paperId = paperList[0].id; info( `addMockPrinter, corrected default paperId setting value: ${defaultSettings.paperId}` ); } let printer = { name, supportsColor: Promise.resolve(true), supportsMonochrome: Promise.resolve(true), printerInfo: printerInfoPromise.then(() => ({ paperList, defaultSettings, QueryInterface: ChromeUtils.generateQI([Ci.nsIPrinterInfo]), })), QueryInterface: ChromeUtils.generateQI([Ci.nsIPrinter]), }; if (!this._mockPrinters) { this._mockPrinters = [printer]; this.beforeInit(win => (win._mockPrinters = this._mockPrinters)); } else { this._mockPrinters.push(printer); } return printer; } get _tabDialogBox() { return this.sourceBrowser.ownerGlobal.gBrowser.getTabDialogBox( this.sourceBrowser ); } get _tabDialogBoxManager() { return this._tabDialogBox.getTabDialogManager(); } get _dialogs() { return this._tabDialogBox.getTabDialogManager()._dialogs; } get dialog() { return this._dialogs.find(dlg => dlg._box.querySelector(".printSettingsBrowser") ); } get paginationElem() { return this.dialog._box.querySelector(".printPreviewNavigation"); } get paginationSheetIndicator() { return this.paginationElem.shadowRoot.querySelector("#sheetIndicator"); } get currentPrintPreviewBrowser() { return this.win.PrintEventHandler.printPreviewEl.lastPreviewBrowser; } get _printBrowser() { return this.dialog._frame; } get doc() { return this._printBrowser.contentDocument; } get win() { return this._printBrowser.contentWindow; } get(id) { return this.doc.getElementById(id); } get sheetCount() { return this.doc.l10n.getAttributes(this.get("sheet-count")).args.sheetCount; } get sourceURI() { return this.win.PrintEventHandler.activeCurrentURI; } async waitForReaderModeReady() { if (gBrowser.selectedBrowser.isArticle) { return; } await new Promise(resolve => { let onReaderModeChange = { receiveMessage(message) { if ( message.data && message.data.isArticle !== undefined && gBrowser.selectedBrowser.isArticle ) { AboutReaderParent.removeMessageListener( "Reader:UpdateReaderButton", onReaderModeChange ); resolve(); } }, }; AboutReaderParent.addMessageListener( "Reader:UpdateReaderButton", onReaderModeChange ); }); } async waitForPreview(changeFn) { changeFn(); await BrowserTestUtils.waitForEvent(this.doc, "preview-updated"); } async waitForSettingsEvent(changeFn) { let changed = BrowserTestUtils.waitForEvent(this.doc, "print-settings"); await changeFn?.(); await BrowserTestUtils.waitForCondition( () => !this.win.PrintEventHandler._delayedSettingsChangeTask.isArmed, "Wait for all delayed tasks to execute" ); await changed; } click(el, { scroll = true } = {}) { if (scroll) { el.scrollIntoView(); } ok(BrowserTestUtils.isVisible(el), "Element must be visible to click"); EventUtils.synthesizeMouseAtCenter(el, {}, this.win); } text(el, text) { this.click(el); el.value = ""; EventUtils.sendString(text, this.win); } async openMoreSettings(options) { let details = this.get("more-settings"); if (!details.open) { this.click(details.firstElementChild, options); } await this.awaitAnimationFrame(); } dispatchSettingsChange(settings) { this.doc.dispatchEvent( new CustomEvent("update-print-settings", { detail: settings, }) ); } get settings() { return this.win.PrintEventHandler.settings; } get viewSettings() { return this.win.PrintEventHandler.viewSettings; } _assertMatches(a, b, msg) { if (Array.isArray(a)) { is(a.length, b.length, msg); for (let i = 0; i < a.length; ++i) { this._assertMatches(a[i], b[i], msg); } return; } is(a, b, msg); } assertSettingsMatch(expected) { let { settings } = this; for (let [setting, value] of Object.entries(expected)) { this._assertMatches(settings[setting], value, `${setting} matches`); } } assertPrintedWithSettings(expected) { ok(this._printedSettings, "Printed settings have been recorded"); for (let [setting, value] of Object.entries(expected)) { this._assertMatches( this._printedSettings[setting], value, `${setting} matches printed setting` ); } } get _lastPrintPreviewSettings() { return this.win.PrintEventHandler._lastPrintPreviewSettings; } assertPreviewedWithSettings(expected) { let settings = this._lastPrintPreviewSettings; ok(settings, "Last preview settings are available"); for (let [setting, value] of Object.entries(expected)) { this._assertMatches( settings[setting], value, `${setting} matches previewed setting` ); } } async assertSettingsChanged(from, to, changeFn) { is( Object.keys(from).length, Object.keys(to).length, "Got the same number of settings to check" ); ok( Object.keys(from).every(s => s in to), "Checking the same setting names" ); this.assertSettingsMatch(from); await changeFn(); this.assertSettingsMatch(to); } async assertSettingsNotChanged(settings, changeFn) { await this.assertSettingsChanged(settings, settings, changeFn); } awaitAnimationFrame() { return new Promise(resolve => this.win.requestAnimationFrame(resolve)); } mockFilePickerCancel() { if (!pickerMocked) { pickerMocked = true; MockFilePicker.init(window); registerCleanupFunction(() => MockFilePicker.cleanup()); } MockFilePicker.returnValue = MockFilePicker.returnCancel; } mockFilePicker(filename) { if (!pickerMocked) { pickerMocked = true; MockFilePicker.init(window); registerCleanupFunction(() => MockFilePicker.cleanup()); } MockFilePicker.returnValue = MockFilePicker.returnOK; let file = Services.dirsvc.get("TmpD", Ci.nsIFile); file.append(filename); registerCleanupFunction(() => { if (file.exists()) { file.remove(false); } }); MockFilePicker.setFiles([file]); return file; } } function waitForPreviewVisible() { return BrowserTestUtils.waitForCondition(function () { let preview = document.querySelector(".printPreviewBrowser"); return preview && BrowserTestUtils.isVisible(preview); }); }