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Diffstat (limited to 'toolkit/modules/SubDialog.sys.mjs')
| -rw-r--r-- | toolkit/modules/SubDialog.sys.mjs | 1179 |
1 files changed, 1179 insertions, 0 deletions
diff --git a/toolkit/modules/SubDialog.sys.mjs b/toolkit/modules/SubDialog.sys.mjs new file mode 100644 index 0000000000..2f40020c31 --- /dev/null +++ b/toolkit/modules/SubDialog.sys.mjs @@ -0,0 +1,1179 @@ +/* - This Source Code Form is subject to the terms of the Mozilla Public + - License, v. 2.0. If a copy of the MPL was not distributed with this file, + - You can obtain one at http://mozilla.org/MPL/2.0/. */ + +import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs"; + +let lazy = {}; + +XPCOMUtils.defineLazyServiceGetter( + lazy, + "dragService", + "@mozilla.org/widget/dragservice;1", + "nsIDragService" +); + +/** + * The SubDialog resize callback. + * @callback SubDialog~resizeCallback + * @param {DOMNode} title - The title element of the dialog. + * @param {xul:browser} frame - The browser frame of the dialog. + */ + +/** + * SubDialog constructor creates a new subdialog from a template and appends + * it to the parentElement. + * @param {DOMNode} template - The template is copied to create a new dialog. + * @param {DOMNode} parentElement - New dialog is appended onto parentElement. + * @param {String} id - A unique identifier for the dialog. + * @param {Object} dialogOptions - Dialog options object. + * @param {String[]} [dialogOptions.styleSheets] - An array of URLs to additional + * stylesheets to inject into the frame. + * @param {Boolean} [consumeOutsideClicks] - Whether to close the dialog when + * its background overlay is clicked. + * @param {SubDialog~resizeCallback} [resizeCallback] - Function to be called on + * dialog resize. + */ +export function SubDialog({ + template, + parentElement, + id, + dialogOptions: { + styleSheets = [], + consumeOutsideClicks = true, + resizeCallback, + } = {}, +}) { + this._id = id; + + this._injectedStyleSheets = this._injectedStyleSheets.concat(styleSheets); + this._consumeOutsideClicks = consumeOutsideClicks; + this._resizeCallback = resizeCallback; + this._overlay = template.cloneNode(true); + this._box = this._overlay.querySelector(".dialogBox"); + this._titleBar = this._overlay.querySelector(".dialogTitleBar"); + this._titleElement = this._overlay.querySelector(".dialogTitle"); + this._closeButton = this._overlay.querySelector(".dialogClose"); + this._frame = this._overlay.querySelector(".dialogFrame"); + + this._overlay.classList.add(`dialogOverlay-${id}`); + this._frame.setAttribute("name", `dialogFrame-${id}`); + this._frameCreated = new Promise(resolve => { + this._frame.addEventListener( + "load", + () => { + // We intentionally avoid handling or passing the event to the + // resolve method to avoid shutdown window leaks. See bug 1686743. + resolve(); + }, + { + once: true, + capture: true, + } + ); + }); + + parentElement.appendChild(this._overlay); + this._overlay.hidden = false; +} + +SubDialog.prototype = { + _closingCallback: null, + _closingEvent: null, + _isClosing: false, + _frame: null, + _frameCreated: null, + _overlay: null, + _box: null, + _openedURL: null, + _injectedStyleSheets: ["chrome://global/skin/in-content/common.css"], + _resizeObserver: null, + _template: null, + _id: null, + _titleElement: null, + _closeButton: null, + + get frameContentWindow() { + return this._frame?.contentWindow; + }, + + get _window() { + return this._overlay?.ownerGlobal; + }, + + updateTitle(aEvent) { + if (aEvent.target != this._frame.contentDocument) { + return; + } + this._titleElement.textContent = this._frame.contentDocument.title; + }, + + injectXMLStylesheet(aStylesheetURL) { + const doc = this._frame.contentDocument; + if ([...doc.styleSheets].find(s => s.href === aStylesheetURL)) { + return; + } + let contentStylesheet = doc.createProcessingInstruction( + "xml-stylesheet", + 'href="' + aStylesheetURL + '" type="text/css"' + ); + doc.insertBefore(contentStylesheet, doc.documentElement); + }, + + async open( + aURL, + { features, closingCallback, closedCallback, sizeTo } = {}, + ...aParams + ) { + if (["available", "limitheight"].includes(sizeTo)) { + this._box.setAttribute("sizeto", sizeTo); + } + + // Create a promise so consumers can tell when we're done setting up. + this._dialogReady = new Promise(resolve => { + this._resolveDialogReady = resolve; + }); + this._frame._dialogReady = this._dialogReady; + + // Assign close callbacks sync to ensure we can always callback even if the + // SubDialog is closed directly after opening. + let dialog = null; + + if (closingCallback) { + this._closingCallback = (...args) => { + closingCallback.apply(dialog, args); + }; + } + if (closedCallback) { + this._closedCallback = (...args) => { + closedCallback.apply(dialog, args); + }; + } + + // Wait until frame is ready to prevent browser crash in tests + await this._frameCreated; + + if (!this._frame.contentWindow) { + // Given the binding constructor execution is asynchronous, and "load" + // event can be dispatched before the browser element is shown, the + // browser binding might not be constructed at this point. Forcibly + // construct the frame and construct the binding. + // FIXME: Remove this (bug 1437247) + this._frame.getBoundingClientRect(); + } + + // If we're open on some (other) URL or we're closing, open when closing has finished. + if (this._openedURL || this._isClosing) { + if (!this._isClosing) { + this.close(); + } + let args = Array.from(arguments); + this._closingPromise.then(() => { + this.open.apply(this, args); + }); + return; + } + this._addDialogEventListeners(); + + // Ensure we end any pending drag sessions: + try { + // The drag service getService call fails in puppeteer tests on Linux, + // so this is in a try...catch as it shouldn't stop us from opening the + // dialog. Bug 1806870 tracks fixing this. + if (lazy.dragService.getCurrentSession()) { + lazy.dragService.endDragSession(true); + } + } catch (ex) { + console.error(ex); + } + + // If the parent is chrome we also need open the dialog as chrome, otherwise + // the openDialog call will fail. + let dialogFeatures = `resizable,dialog=no,centerscreen,chrome=${ + this._window?.isChromeWindow ? "yes" : "no" + }`; + if (features) { + dialogFeatures = `${features},${dialogFeatures}`; + } + + dialog = this._window.openDialog( + aURL, + `dialogFrame-${this._id}`, + dialogFeatures, + ...aParams + ); + + this._closingEvent = null; + this._isClosing = false; + this._openedURL = aURL; + + dialogFeatures = dialogFeatures.replace(/,/g, "&"); + let featureParams = new URLSearchParams(dialogFeatures.toLowerCase()); + this._box.setAttribute( + "resizable", + featureParams.has("resizable") && + featureParams.get("resizable") != "no" && + featureParams.get("resizable") != "0" + ); + }, + + /** + * Close the dialog and mark it as aborted. + */ + abort() { + this._closingEvent = new CustomEvent("dialogclosing", { + bubbles: true, + detail: { dialog: this, abort: true }, + }); + this._frame.contentWindow.close(); + // It's possible that we're aborting this dialog before we've had a + // chance to set up the contentWindow.close function override in + // _onContentLoaded. If so, call this.close() directly to clean things + // up. That'll be a no-op if the contentWindow.close override had been + // set up, since this.close is idempotent. + this.close(this._closingEvent); + }, + + close(aEvent = null) { + if (this._isClosing) { + return; + } + this._isClosing = true; + this._closingPromise = new Promise(resolve => { + this._resolveClosePromise = resolve; + }); + + if (this._closingCallback) { + try { + this._closingCallback.call(null, aEvent); + } catch (ex) { + console.error(ex); + } + this._closingCallback = null; + } + + this._removeDialogEventListeners(); + + this._overlay.style.visibility = ""; + // Clear the sizing inline styles. + this._frame.removeAttribute("style"); + // Clear the sizing attributes + this._box.removeAttribute("width"); + this._box.removeAttribute("height"); + this._box.style.removeProperty("--box-max-height-requested"); + this._box.style.removeProperty("--box-max-width-requested"); + this._box.style.removeProperty("min-height"); + this._box.style.removeProperty("min-width"); + this._overlay.style.removeProperty("--subdialog-inner-height"); + + let onClosed = () => { + this._openedURL = null; + + this._resolveClosePromise(); + + if (this._closedCallback) { + try { + this._closedCallback.call(null, aEvent); + } catch (ex) { + console.error(ex); + } + this._closedCallback = null; + } + }; + + // Wait for the frame to unload before running the closed callback. + if (this._frame.contentWindow) { + this._frame.contentWindow.addEventListener("unload", onClosed, { + once: true, + }); + } else { + onClosed(); + } + + this._overlay.dispatchEvent( + new CustomEvent("dialogclose", { + bubbles: true, + detail: { dialog: this }, + }) + ); + + // Defer removing the overlay so the frame content window can unload. + Services.tm.dispatchToMainThread(() => { + this._overlay.remove(); + }); + }, + + handleEvent(aEvent) { + switch (aEvent.type) { + case "click": + // Close the dialog if the user clicked the overlay background, just + // like when the user presses the ESC key (case "command" below). + if (aEvent.target !== this._overlay) { + break; + } + if (this._consumeOutsideClicks) { + this._frame.contentWindow.close(); + break; + } + this._frame.focus(); + break; + case "command": + this._frame.contentWindow.close(); + break; + case "dialogclosing": + this._onDialogClosing(aEvent); + break; + case "DOMTitleChanged": + this.updateTitle(aEvent); + break; + case "DOMFrameContentLoaded": + this._onContentLoaded(aEvent); + break; + case "load": + this._onLoad(aEvent); + break; + case "unload": + this._onUnload(aEvent); + break; + case "keydown": + this._onKeyDown(aEvent); + break; + case "focus": + this._onParentWinFocus(aEvent); + break; + } + }, + + /* Private methods */ + + _onUnload(aEvent) { + if ( + aEvent.target !== this._frame?.contentDocument || + aEvent.target.location.href !== this._openedURL + ) { + return; + } + this.abort(); + }, + + _onContentLoaded(aEvent) { + if ( + aEvent.target != this._frame || + aEvent.target.contentWindow.location == "about:blank" + ) { + return; + } + + for (let styleSheetURL of this._injectedStyleSheets) { + this.injectXMLStylesheet(styleSheetURL); + } + + let { contentDocument } = this._frame; + // Provide the ability for the dialog to know that it is loaded in a frame + // rather than as a top-level window. + for (let dialog of contentDocument.querySelectorAll("dialog")) { + dialog.setAttribute("subdialog", "true"); + } + // Sub-dialogs loaded in a chrome window should use the system font size so + // that the user has a way to increase or decrease it via system settings. + // Sub-dialogs loaded in the content area, on the other hand, can be zoomed + // like web content. + if (this._window.isChromeWindow) { + contentDocument.documentElement.classList.add("system-font-size"); + } + // Used by CSS to give the appropriate background colour in dark mode. + contentDocument.documentElement.setAttribute("dialogroot", "true"); + + this._frame.contentWindow.addEventListener("dialogclosing", this); + + let oldResizeBy = this._frame.contentWindow.resizeBy; + this._frame.contentWindow.resizeBy = (resizeByWidth, resizeByHeight) => { + // Only handle resizeByHeight currently. + let frameHeight = this._overlay.style.getPropertyValue( + "--subdialog-inner-height" + ); + if (frameHeight) { + frameHeight = parseFloat(frameHeight); + } else { + frameHeight = this._frame.clientHeight; + } + let boxMinHeight = parseFloat( + this._window.getComputedStyle(this._box).minHeight + ); + + this._box.style.minHeight = boxMinHeight + resizeByHeight + "px"; + + this._overlay.style.setProperty( + "--subdialog-inner-height", + frameHeight + resizeByHeight + "px" + ); + + oldResizeBy.call( + this._frame.contentWindow, + resizeByWidth, + resizeByHeight + ); + }; + + // Make window.close calls work like dialog closing. + let oldClose = this._frame.contentWindow.close; + this._frame.contentWindow.close = () => { + var closingEvent = this._closingEvent; + // If this._closingEvent is set, the dialog is closed externally + // (dialog.js) and "dialogclosing" has already been dispatched. + if (!closingEvent) { + // If called without closing event, we need to create and dispatch it. + // This is the case for any external close calls not going through + // dialog.js. + closingEvent = new CustomEvent("dialogclosing", { + bubbles: true, + detail: { button: null }, + }); + + this._frame.contentWindow.dispatchEvent(closingEvent); + } else if (this._closingEvent.detail?.abort) { + // If the dialog is aborted (SubDialog#abort) we need to dispatch the + // "dialogclosing" event ourselves. + this._frame.contentWindow.dispatchEvent(closingEvent); + } + + this.close(closingEvent); + oldClose.call(this._frame.contentWindow); + }; + + // XXX: Hack to make focus during the dialog's load functions work. Make the element visible + // sooner in DOMContentLoaded but mostly invisible instead of changing visibility just before + // the dialog's load event. + // Note that this needs to inherit so that hideDialog() works as expected. + this._overlay.style.visibility = "inherit"; + this._overlay.style.opacity = "0.01"; + + // Ensure the document gets an a11y role of dialog. + const a11yDoc = contentDocument.body || contentDocument.documentElement; + a11yDoc.setAttribute("role", "dialog"); + + Services.obs.notifyObservers(this._frame.contentWindow, "subdialog-loaded"); + }, + + async _onLoad(aEvent) { + let target = aEvent.currentTarget; + if (target.contentWindow.location == "about:blank") { + return; + } + + // In order to properly calculate the sizing of the subdialog, we need to + // ensure that all of the l10n is done. + if (target.contentDocument.l10n) { + await target.contentDocument.l10n.ready; + } + + // Some subdialogs may want to perform additional, asynchronous steps during initializations. + // + // In that case, we expect them to define a Promise which will delay measuring + // until the promise is fulfilled. + if (target.contentDocument.mozSubdialogReady) { + await target.contentDocument.mozSubdialogReady; + } + + await this.resizeDialog(); + this._resolveDialogReady(); + }, + + async resizeDialog() { + // Do this on load to wait for the CSS to load and apply before calculating the size. + let docEl = this._frame.contentDocument.documentElement; + + // These are deduced from styles which we don't change, so it's safe to get them now: + let boxHorizontalBorder = + 2 * parseFloat(this._window.getComputedStyle(this._box).borderLeftWidth); + let frameHorizontalMargin = + 2 * parseFloat(this._window.getComputedStyle(this._frame).marginLeft); + + // Then determine and set a bunch of width stuff: + let { scrollWidth } = docEl.ownerDocument.body || docEl; + // We need to convert em to px because an em value from the dialog window could + // translate to something else in the host window, as font sizes may vary. + let frameMinWidth = + this._emToPx(docEl.style.minWidth) || + this._emToPx(docEl.style.width) || + scrollWidth + "px"; + let frameWidth = docEl.getAttribute("width") + ? docEl.getAttribute("width") + "px" + : scrollWidth + "px"; + if ( + this._box.getAttribute("sizeto") == "available" && + docEl.style.maxWidth + ) { + this._box.style.setProperty( + "--box-max-width-requested", + this._emToPx(docEl.style.maxWidth) + ); + } + + if (this._box.getAttribute("sizeto") != "available") { + this._frame.style.width = frameWidth; + this._frame.style.minWidth = frameMinWidth; + } + + let boxMinWidth = `calc(${ + boxHorizontalBorder + frameHorizontalMargin + }px + ${frameMinWidth})`; + + // Temporary fix to allow parent chrome to collapse properly to min width. + // See Bug 1658722. + if (this._window.isChromeWindow) { + boxMinWidth = `min(80vw, ${boxMinWidth})`; + } + this._box.style.minWidth = boxMinWidth; + + this.resizeVertically(); + + this._overlay.dispatchEvent( + new CustomEvent("dialogopen", { + bubbles: true, + detail: { dialog: this }, + }) + ); + this._overlay.style.visibility = "inherit"; + this._overlay.style.opacity = ""; // XXX: focus hack continued from _onContentLoaded + + if (this._box.getAttribute("resizable") == "true") { + this._onResize = this._onResize.bind(this); + this._resizeObserver = new this._window.MutationObserver(this._onResize); + this._resizeObserver.observe(this._box, { attributes: true }); + } + + this._trapFocus(); + + this._resizeCallback?.({ + title: this._titleElement, + frame: this._frame, + }); + }, + + resizeVertically() { + let docEl = this._frame.contentDocument.documentElement; + let getDocHeight = () => { + let { scrollHeight } = docEl.ownerDocument.body || docEl; + // We need to convert em to px because an em value from the dialog window could + // translate to something else in the host window, as font sizes may vary. + return this._emToPx(docEl.style.height) || scrollHeight + "px"; + }; + + // If the title bar is disabled (not in the template), + // set its height to 0 for the calculation. + let titleBarHeight = 0; + if (this._titleBar) { + titleBarHeight = + this._titleBar.clientHeight + + parseFloat( + this._window.getComputedStyle(this._titleBar).borderBottomWidth + ); + } + + let boxVerticalBorder = + 2 * parseFloat(this._window.getComputedStyle(this._box).borderTopWidth); + let frameVerticalMargin = + 2 * parseFloat(this._window.getComputedStyle(this._frame).marginTop); + + // The difference between the frame and box shouldn't change, either: + let boxRect = this._box.getBoundingClientRect(); + let frameRect = this._frame.getBoundingClientRect(); + let frameSizeDifference = + frameRect.top - boxRect.top + (boxRect.bottom - frameRect.bottom); + + let contentPane = + this._frame.contentDocument.querySelector(".contentPane") || + this._frame.contentDocument.querySelector("dialog"); + + let sizeTo = this._box.getAttribute("sizeto"); + if (["available", "limitheight"].includes(sizeTo)) { + if (sizeTo == "limitheight") { + this._overlay.style.setProperty("--doc-height-px", getDocHeight()); + contentPane?.classList.add("sizeDetermined"); + } else { + if (docEl.style.maxHeight) { + this._box.style.setProperty( + "--box-max-height-requested", + this._emToPx(docEl.style.maxHeight) + ); + } + // Inform the CSS of the toolbar height so the bottom padding can be + // correctly calculated. + this._box.style.setProperty("--box-top-px", `${boxRect.top}px`); + } + return; + } + + // Now do the same but for the height. We need to do this afterwards because otherwise + // XUL assumes we'll optimize for height and gives us "wrong" values which then are no + // longer correct after we set the width: + let frameMinHeight = getDocHeight(); + let frameHeight = docEl.getAttribute("height") + ? docEl.getAttribute("height") + "px" + : frameMinHeight; + + // Now check if the frame height we calculated is possible at this window size, + // accounting for titlebar, padding/border and some spacing. + let frameOverhead = frameSizeDifference + titleBarHeight; + let maxHeight = this._window.innerHeight - frameOverhead; + // Do this with a frame height in pixels... + if (!frameHeight.endsWith("px")) { + console.error( + "This dialog (", + this._frame.contentWindow.location.href, + ") set a height in non-px-non-em units ('", + frameHeight, + "'), " + + "which is likely to lead to bad sizing in in-content preferences. " + + "Please consider changing this." + ); + } + + if ( + parseFloat(frameMinHeight) > maxHeight || + parseFloat(frameHeight) > maxHeight + ) { + // If the height is bigger than that of the window, we should let the + // contents scroll. The class is set on the "dialog" element, unless a + // content pane exists, which is usually the case when the "window" + // element is used to implement the subdialog instead. + frameMinHeight = maxHeight + "px"; + // There also instances where the subdialog is neither implemented using + // a content pane, nor a <dialog> (such as manageAddresses.xhtml) + // so make sure to check that we actually got a contentPane before we + // use it. + contentPane?.classList.add("doScroll"); + } + + this._overlay.style.setProperty("--subdialog-inner-height", frameHeight); + this._frame.style.height = `min( + calc(100vh - ${frameOverhead}px), + var(--subdialog-inner-height, ${frameHeight}) + )`; + this._box.style.minHeight = `calc( + ${boxVerticalBorder + titleBarHeight + frameVerticalMargin}px + + ${frameMinHeight} + )`; + }, + + /** + * Helper for converting em to px because an em value from the dialog window could + * translate to something else in the host window, as font sizes may vary. + * + * @param {String} val + * A CSS length value. + * @return {String} The converted CSS length value, or the original value if + * no conversion took place. + */ + _emToPx(val) { + if (val && val.endsWith("em")) { + let { fontSize } = this.frameContentWindow.getComputedStyle( + this._frame.contentDocument.documentElement + ); + return parseFloat(val) * parseFloat(fontSize) + "px"; + } + return val; + }, + + _onResize(mutations) { + let frame = this._frame; + // The width and height styles are needed for the initial + // layout of the frame, but afterward they need to be removed + // or their presence will restrict the contents of the <browser> + // from resizing to a smaller size. + frame.style.removeProperty("width"); + frame.style.removeProperty("height"); + + let docEl = frame.contentDocument.documentElement; + let persistedAttributes = docEl.getAttribute("persist"); + if ( + !persistedAttributes || + (!persistedAttributes.includes("width") && + !persistedAttributes.includes("height")) + ) { + return; + } + + for (let mutation of mutations) { + if (mutation.attributeName == "width") { + docEl.setAttribute("width", docEl.scrollWidth); + } else if (mutation.attributeName == "height") { + docEl.setAttribute("height", docEl.scrollHeight); + } + } + }, + + _onDialogClosing(aEvent) { + this._frame.contentWindow.removeEventListener("dialogclosing", this); + this._closingEvent = aEvent; + }, + + _onKeyDown(aEvent) { + // Close on ESC key if target is SubDialog + // If we're in the parent window, we need to check if the SubDialogs + // frame is targeted, so we don't close the wrong dialog. + if (aEvent.keyCode == aEvent.DOM_VK_ESCAPE && !aEvent.defaultPrevented) { + if ( + (this._window.isChromeWindow && aEvent.currentTarget == this._box) || + (!this._window.isChromeWindow && aEvent.currentTarget == this._window) + ) { + // Prevent ESC on SubDialog from cancelling page load (Bug 1665339). + aEvent.preventDefault(); + this._frame.contentWindow.close(); + return; + } + } + + if ( + this._window.isChromeWindow || + aEvent.keyCode != aEvent.DOM_VK_TAB || + aEvent.ctrlKey || + aEvent.altKey || + aEvent.metaKey + ) { + return; + } + + let fm = Services.focus; + + let isLastFocusableElement = el => { + // XXXgijs unfortunately there is no way to get the last focusable element without asking + // the focus manager to move focus to it. + let rv = + el == + fm.moveFocus(this._frame.contentWindow, null, fm.MOVEFOCUS_LAST, 0); + fm.setFocus(el, 0); + return rv; + }; + + let forward = !aEvent.shiftKey; + // check if focus is leaving the frame (incl. the close button): + if ( + (aEvent.target == this._closeButton && !forward) || + (isLastFocusableElement(aEvent.originalTarget) && forward) + ) { + aEvent.preventDefault(); + aEvent.stopImmediatePropagation(); + + let parentWin = this._window.docShell.chromeEventHandler.ownerGlobal; + if (forward) { + fm.moveFocus(parentWin, null, fm.MOVEFOCUS_FIRST, fm.FLAG_BYKEY); + } else { + // Somehow, moving back 'past' the opening doc is not trivial. Cheat by doing it in 2 steps: + fm.moveFocus(this._window, null, fm.MOVEFOCUS_ROOT, fm.FLAG_BYKEY); + fm.moveFocus(parentWin, null, fm.MOVEFOCUS_BACKWARD, fm.FLAG_BYKEY); + } + } + }, + + _onParentWinFocus(aEvent) { + // Explicitly check for the focus target of |window| to avoid triggering this when the window + // is refocused + if ( + this._closeButton && + aEvent.target != this._closeButton && + aEvent.target != this._window + ) { + this._closeButton.focus(); + } + }, + + /** + * Setup dialog event listeners. + * @param {Boolean} [includeLoad] - Whether to register load/unload listeners. + */ + _addDialogEventListeners(includeLoad = true) { + if (this._window.isChromeWindow) { + // Only register an event listener if we have a title to show. + if (this._titleBar) { + this._frame.addEventListener("DOMTitleChanged", this, true); + } + + if (includeLoad) { + this._window.addEventListener("unload", this, true); + } + } else { + let chromeBrowser = this._window.docShell.chromeEventHandler; + + if (includeLoad) { + // For content windows we listen for unload of the browser + chromeBrowser.addEventListener("unload", this, true); + } + + if (this._titleBar) { + chromeBrowser.addEventListener("DOMTitleChanged", this, true); + } + } + + // Make the close button work. + this._closeButton?.addEventListener("command", this); + + if (includeLoad) { + // DOMFrameContentLoaded only fires on the top window + this._window.addEventListener("DOMFrameContentLoaded", this, true); + + // Wait for the stylesheets injected during DOMContentLoaded to load before showing the dialog + // otherwise there is a flicker of the stylesheet applying. + this._frame.addEventListener("load", this, true); + } + + // Ensure we get <esc> keypresses even if nothing in the subdialog is focusable + // (happens on OS X when only text inputs and lists are focusable, and + // the subdialog only has checkboxes/radiobuttons/buttons) + if (!this._window.isChromeWindow) { + this._window.addEventListener("keydown", this, true); + } + + this._overlay.addEventListener("click", this, true); + }, + + /** + * Remove dialog event listeners. + * @param {Boolean} [includeLoad] - Whether to remove load/unload listeners. + */ + _removeDialogEventListeners(includeLoad = true) { + if (this._window.isChromeWindow) { + this._frame.removeEventListener("DOMTitleChanged", this, true); + + if (includeLoad) { + this._window.removeEventListener("unload", this, true); + } + } else { + let chromeBrowser = this._window.docShell.chromeEventHandler; + if (includeLoad) { + chromeBrowser.removeEventListener("unload", this, true); + } + + chromeBrowser.removeEventListener("DOMTitleChanged", this, true); + } + + this._closeButton?.removeEventListener("command", this); + + if (includeLoad) { + this._window.removeEventListener("DOMFrameContentLoaded", this, true); + this._frame.removeEventListener("load", this, true); + this._frame.contentWindow.removeEventListener("dialogclosing", this); + } + + this._window.removeEventListener("keydown", this, true); + + this._overlay.removeEventListener("click", this, true); + + if (this._resizeObserver) { + this._resizeObserver.disconnect(); + this._resizeObserver = null; + } + + this._untrapFocus(); + }, + + /** + * Focus the dialog content. + * If the embedded document defines a custom focus handler it will be called. + * Otherwise we will focus the first focusable element in the content window. + * @param {boolean} [isInitialFocus] - Whether the dialog is focused for the + * first time after opening. + */ + focus(isInitialFocus = false) { + // If the content window has its own focus logic, hand off the focus call. + let focusHandler = this._frame?.contentDocument?.subDialogSetDefaultFocus; + if (focusHandler) { + focusHandler(isInitialFocus); + return; + } + // Handle focus ourselves. Try to move the focus to the first element in + // the content window. + let fm = Services.focus; + + // We're intentionally hiding the focus ring here for now per bug 1704882, + // but we aim to have a better fix that retains the focus ring for users + // that had brought up the dialog by keyboard in bug 1708261. + let focusedElement = fm.moveFocus( + this._frame.contentWindow, + null, + fm.MOVEFOCUS_FIRST, + fm.FLAG_NOSHOWRING + ); + if (!focusedElement) { + // Ensure the focus is pulled out of the content document even if there's + // nothing focusable in the dialog. + this._frame.focus(); + } + }, + + _trapFocus() { + // Attach a system event listener so the dialog can cancel keydown events. + // See Bug 1669990. + this._box.addEventListener("keydown", this, { mozSystemGroup: true }); + this._closeButton?.addEventListener("keydown", this); + + if (!this._window.isChromeWindow) { + this._window.addEventListener("focus", this, true); + } + }, + + _untrapFocus() { + this._box.removeEventListener("keydown", this, { mozSystemGroup: true }); + this._closeButton?.removeEventListener("keydown", this); + this._window.removeEventListener("focus", this, true); + }, +}; + +/** + * Manages multiple SubDialogs in a dialog stack element. + */ +export class SubDialogManager { + /** + * @param {Object} options - Dialog manager options. + * @param {DOMNode} options.dialogStack - Container element for all dialogs + * this instance manages. + * @param {DOMNode} options.dialogTemplate - Element to use as template for + * constructing new dialogs. + * @param {Number} [options.orderType] - Whether dialogs should be ordered as + * a stack or a queue. + * @param {Boolean} [options.allowDuplicateDialogs] - Whether to allow opening + * duplicate dialogs (same URI) at the same time. If disabled, opening a + * dialog with the same URI as an existing dialog will be a no-op. + * @param {Object} options.dialogOptions - Options passed to every + * SubDialog instance. + * @see {@link SubDialog} for a list of dialog options. + */ + constructor({ + dialogStack, + dialogTemplate, + orderType = SubDialogManager.ORDER_STACK, + allowDuplicateDialogs = false, + dialogOptions, + }) { + /** + * New dialogs are pushed to the end of the _dialogs array. + * Depending on the orderType either the last element (stack) or the first + * element (queue) in the array will be the top and visible. + * @type {SubDialog[]} + */ + this._dialogs = []; + this._dialogStack = dialogStack; + this._dialogTemplate = dialogTemplate; + this._topLevelPrevActiveElement = null; + this._orderType = orderType; + this._allowDuplicateDialogs = allowDuplicateDialogs; + this._dialogOptions = dialogOptions; + + this._preloadDialog = new SubDialog({ + template: this._dialogTemplate, + parentElement: this._dialogStack, + id: SubDialogManager._nextDialogID++, + dialogOptions: this._dialogOptions, + }); + } + + /** + * Get the dialog which is currently on top. This depends on whether the + * dialogs are in a stack or a queue. + */ + get _topDialog() { + if (!this._dialogs.length) { + return undefined; + } + if (this._orderType === SubDialogManager.ORDER_STACK) { + return this._dialogs[this._dialogs.length - 1]; + } + return this._dialogs[0]; + } + + open( + aURL, + { + features, + closingCallback, + closedCallback, + allowDuplicateDialogs, + sizeTo, + hideContent, + } = {}, + ...aParams + ) { + let allowDuplicates = + allowDuplicateDialogs != null + ? allowDuplicateDialogs + : this._allowDuplicateDialogs; + // If we're already open/opening on this URL, do nothing. + if ( + !allowDuplicates && + this._dialogs.some(dialog => dialog._openedURL == aURL) + ) { + return undefined; + } + + let doc = this._dialogStack.ownerDocument; + + // For dialog stacks, remember the last active element before opening the + // next dialog. This allows us to restore focus on dialog close. + if ( + this._orderType === SubDialogManager.ORDER_STACK && + this._dialogs.length + ) { + this._topDialog._prevActiveElement = doc.activeElement; + } + + if (!this._dialogs.length) { + // When opening the first dialog, show the dialog stack. + this._dialogStack.hidden = false; + this._dialogStack.classList.remove("temporarilyHidden"); + this._topLevelPrevActiveElement = doc.activeElement; + } + + // Consumers may pass this flag to make the dialog overlay background opaque, + // effectively hiding the content behind it. For example, + // this is used by the prompt code to prevent certain http authentication spoofing scenarios. + if (hideContent) { + this._preloadDialog._overlay.setAttribute("hideContent", true); + } + this._dialogs.push(this._preloadDialog); + this._preloadDialog.open( + aURL, + { + features, + closingCallback, + closedCallback, + sizeTo, + }, + ...aParams + ); + + let openedDialog = this._preloadDialog; + + this._preloadDialog = new SubDialog({ + template: this._dialogTemplate, + parentElement: this._dialogStack, + id: SubDialogManager._nextDialogID++, + dialogOptions: this._dialogOptions, + }); + + if (this._dialogs.length == 1) { + this._ensureStackEventListeners(); + } + + return openedDialog; + } + + close() { + this._topDialog.close(); + } + + /** + * Hides the dialog stack for a specific browser, without actually destroying + * frames for stuff within it. + * + * @param aBrowser - The browser associated with the tab dialog. + */ + hideDialog(aBrowser) { + aBrowser.removeAttribute("tabDialogShowing"); + this._dialogStack.classList.add("temporarilyHidden"); + } + + /** + * Abort open dialogs. + * @param {function} [filterFn] - Function which should return true for + * dialogs that should be aborted and false for dialogs that should remain + * open. Defaults to aborting all dialogs. + */ + abortDialogs(filterFn = () => true) { + this._dialogs.filter(filterFn).forEach(dialog => dialog.abort()); + } + + get hasDialogs() { + if (!this._dialogs.length) { + return false; + } + return this._dialogs.some(dialog => !dialog._isClosing); + } + + get dialogs() { + return [...this._dialogs]; + } + + focusTopDialog() { + this._topDialog?.focus(); + } + + handleEvent(aEvent) { + switch (aEvent.type) { + case "dialogopen": { + this._onDialogOpen(aEvent.detail.dialog); + break; + } + case "dialogclose": { + this._onDialogClose(aEvent.detail.dialog); + break; + } + } + } + + _onDialogOpen(dialog) { + let lowerDialogs = []; + if (dialog == this._topDialog) { + dialog.focus(true); + } else { + // Opening dialog is not on top, hide it + lowerDialogs.push(dialog); + } + + // For stack order, hide the previous top + if ( + this._dialogs.length && + this._orderType === SubDialogManager.ORDER_STACK + ) { + let index = this._dialogs.indexOf(dialog); + if (index > 0) { + lowerDialogs.push(this._dialogs[index - 1]); + } + } + + lowerDialogs.forEach(d => { + if (d._overlay.hasAttribute("topmost")) { + d._overlay.removeAttribute("topmost"); + d._removeDialogEventListeners(false); + } + }); + } + + _onDialogClose(dialog) { + this._dialogs.splice(this._dialogs.indexOf(dialog), 1); + + if (this._topDialog) { + // The prevActiveElement is only set for stacked dialogs + if (this._topDialog._prevActiveElement) { + this._topDialog._prevActiveElement.focus(); + } else { + this._topDialog.focus(true); + } + this._topDialog._overlay.setAttribute("topmost", true); + this._topDialog._addDialogEventListeners(false); + this._dialogStack.hidden = false; + this._dialogStack.classList.remove("temporarilyHidden"); + } else { + // We have closed the last dialog, do cleanup. + this._topLevelPrevActiveElement.focus(); + this._dialogStack.hidden = true; + this._removeStackEventListeners(); + } + } + + _ensureStackEventListeners() { + this._dialogStack.addEventListener("dialogopen", this); + this._dialogStack.addEventListener("dialogclose", this); + } + + _removeStackEventListeners() { + this._dialogStack.removeEventListener("dialogopen", this); + this._dialogStack.removeEventListener("dialogclose", this); + } +} + +// Used for the SubDialogManager orderType option. +SubDialogManager.ORDER_STACK = 0; +SubDialogManager.ORDER_QUEUE = 1; + +SubDialogManager._nextDialogID = 0; |