forked from mirrors/gecko-dev
419 lines
16 KiB
JavaScript
419 lines
16 KiB
JavaScript
/* - This Source Code Form is subject to the terms of the Mozilla Public
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- License, v. 2.0. If a copy of the MPL was not distributed with this file,
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- You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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var gSubDialog = {
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_closingCallback: null,
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_closingEvent: null,
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_isClosing: false,
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_frame: null,
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_overlay: null,
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_box: null,
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_injectedStyleSheets: ["chrome://mozapps/content/preferences/preferences.css",
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"chrome://browser/skin/preferences/preferences.css",
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"chrome://global/skin/in-content/common.css",
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"chrome://browser/skin/preferences/in-content/preferences.css",
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"chrome://browser/skin/preferences/in-content/dialog.css"],
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_resizeObserver: null,
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init: function() {
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this._frame = document.getElementById("dialogFrame");
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this._overlay = document.getElementById("dialogOverlay");
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this._box = document.getElementById("dialogBox");
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this._closeButton = document.getElementById("dialogClose");
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},
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updateTitle: function(aEvent) {
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if (aEvent.target != gSubDialog._frame.contentDocument)
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return;
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document.getElementById("dialogTitle").textContent = gSubDialog._frame.contentDocument.title;
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},
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injectXMLStylesheet: function(aStylesheetURL) {
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let contentStylesheet = this._frame.contentDocument.createProcessingInstruction(
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'xml-stylesheet',
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'href="' + aStylesheetURL + '" type="text/css"'
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);
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this._frame.contentDocument.insertBefore(contentStylesheet,
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this._frame.contentDocument.documentElement);
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},
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open: function(aURL, aFeatures = null, aParams = null, aClosingCallback = null) {
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// If we're already open/opening on this URL, do nothing.
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if (this._openedURL == aURL && !this._isClosing) {
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return;
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}
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// If we're open on some (other) URL or we're closing, open when closing has finished.
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if (this._openedURL || this._isClosing) {
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if (!this._isClosing) {
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this.close();
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}
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let args = Array.from(arguments);
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this._closingPromise.then(() => {
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this.open.apply(this, args);
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});
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return;
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}
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this._addDialogEventListeners();
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let features = (!!aFeatures ? aFeatures + "," : "") + "resizable,dialog=no,centerscreen";
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let dialog = window.openDialog(aURL, "dialogFrame", features, aParams);
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if (aClosingCallback) {
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this._closingCallback = aClosingCallback.bind(dialog);
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}
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this._closingEvent = null;
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this._isClosing = false;
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this._openedURL = aURL;
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features = features.replace(/,/g, "&");
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let featureParams = new URLSearchParams(features.toLowerCase());
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this._box.setAttribute("resizable", featureParams.has("resizable") &&
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featureParams.get("resizable") != "no" &&
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featureParams.get("resizable") != "0");
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},
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close: function(aEvent = null) {
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if (this._isClosing) {
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return;
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}
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this._isClosing = true;
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this._closingPromise = new Promise(resolve => {
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this._resolveClosePromise = resolve;
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});
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if (this._closingCallback) {
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try {
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this._closingCallback.call(null, aEvent);
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} catch (ex) {
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Cu.reportError(ex);
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}
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this._closingCallback = null;
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}
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this._removeDialogEventListeners();
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this._overlay.style.visibility = "";
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// Clear the sizing inline styles.
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this._frame.removeAttribute("style");
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// Clear the sizing attributes
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this._box.removeAttribute("width");
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this._box.removeAttribute("height");
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this._box.style.removeProperty("min-height");
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this._box.style.removeProperty("min-width");
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setTimeout(() => {
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// Unload the dialog after the event listeners run so that the load of about:blank isn't
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// cancelled by the ESC <key>.
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let onBlankLoad = e => {
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if (this._frame.contentWindow.location.href == "about:blank") {
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this._frame.removeEventListener("load", onBlankLoad);
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// We're now officially done closing, so update the state to reflect that.
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delete this._openedURL;
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this._isClosing = false;
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this._resolveClosePromise();
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}
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};
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this._frame.addEventListener("load", onBlankLoad);
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this._frame.loadURI("about:blank");
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}, 0);
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},
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handleEvent: function(aEvent) {
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switch (aEvent.type) {
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case "command":
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this._frame.contentWindow.close();
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break;
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case "dialogclosing":
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this._onDialogClosing(aEvent);
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break;
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case "DOMTitleChanged":
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this.updateTitle(aEvent);
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break;
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case "DOMFrameContentLoaded":
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this._onContentLoaded(aEvent);
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break;
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case "load":
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this._onLoad(aEvent);
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break;
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case "unload":
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this._onUnload(aEvent);
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break;
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case "keydown":
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this._onKeyDown(aEvent);
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break;
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case "focus":
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this._onParentWinFocus(aEvent);
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break;
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}
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},
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/* Private methods */
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_onUnload: function(aEvent) {
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if (aEvent.target.location.href == this._openedURL) {
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this._frame.contentWindow.close();
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}
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},
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_onContentLoaded: function(aEvent) {
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if (aEvent.target != this._frame || aEvent.target.contentWindow.location == "about:blank") {
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return;
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}
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for (let styleSheetURL of this._injectedStyleSheets) {
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this.injectXMLStylesheet(styleSheetURL);
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}
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// Provide the ability for the dialog to know that it is being loaded "in-content".
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this._frame.contentDocument.documentElement.setAttribute("subdialog", "true");
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this._frame.contentWindow.addEventListener("dialogclosing", this);
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// Make window.close calls work like dialog closing.
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let oldClose = this._frame.contentWindow.close;
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this._frame.contentWindow.close = function() {
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var closingEvent = gSubDialog._closingEvent;
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if (!closingEvent) {
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closingEvent = new CustomEvent("dialogclosing", {
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bubbles: true,
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detail: { button: null },
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});
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gSubDialog._frame.contentWindow.dispatchEvent(closingEvent);
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}
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gSubDialog.close(closingEvent);
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oldClose.call(gSubDialog._frame.contentWindow);
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};
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// XXX: Hack to make focus during the dialog's load functions work. Make the element visible
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// sooner in DOMContentLoaded but mostly invisible instead of changing visibility just before
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// the dialog's load event.
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this._overlay.style.visibility = "visible";
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this._overlay.style.opacity = "0.01";
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},
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_onLoad: function(aEvent) {
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if (aEvent.target.contentWindow.location == "about:blank") {
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return;
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}
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// Do this on load to wait for the CSS to load and apply before calculating the size.
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let docEl = this._frame.contentDocument.documentElement;
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let groupBoxTitle = document.getAnonymousElementByAttribute(this._box, "class", "groupbox-title");
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let groupBoxTitleHeight = groupBoxTitle.clientHeight +
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parseFloat(getComputedStyle(groupBoxTitle).borderBottomWidth);
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let groupBoxBody = document.getAnonymousElementByAttribute(this._box, "class", "groupbox-body");
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// These are deduced from styles which we don't change, so it's safe to get them now:
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let boxVerticalPadding = 2 * parseFloat(getComputedStyle(groupBoxBody).paddingTop);
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let boxHorizontalPadding = 2 * parseFloat(getComputedStyle(groupBoxBody).paddingLeft);
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let boxHorizontalBorder = 2 * parseFloat(getComputedStyle(this._box).borderLeftWidth);
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let boxVerticalBorder = 2 * parseFloat(getComputedStyle(this._box).borderTopWidth);
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// The difference between the frame and box shouldn't change, either:
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let boxRect = this._box.getBoundingClientRect();
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let frameRect = this._frame.getBoundingClientRect();
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let frameSizeDifference = (frameRect.top - boxRect.top) + (boxRect.bottom - frameRect.bottom);
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// Then determine and set a bunch of width stuff:
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let frameMinWidth = docEl.style.width || docEl.scrollWidth + "px";
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let frameWidth = docEl.getAttribute("width") ? docEl.getAttribute("width") + "px" :
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frameMinWidth;
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this._frame.style.width = frameWidth;
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this._box.style.minWidth = "calc(" +
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(boxHorizontalBorder + boxHorizontalPadding) +
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"px + " + frameMinWidth + ")";
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// Now do the same but for the height. We need to do this afterwards because otherwise
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// XUL assumes we'll optimize for height and gives us "wrong" values which then are no
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// longer correct after we set the width:
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let frameMinHeight = docEl.style.height || docEl.scrollHeight + "px";
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let frameHeight = docEl.getAttribute("height") ? docEl.getAttribute("height") + "px" :
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frameMinHeight;
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// Now check if the frame height we calculated is possible at this window size,
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// accounting for titlebar, padding/border and some spacing.
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let maxHeight = window.innerHeight - frameSizeDifference - 30;
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// Do this with a frame height in pixels...
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let comparisonFrameHeight;
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if (frameHeight.endsWith("em")) {
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let fontSize = parseFloat(getComputedStyle(this._frame).fontSize);
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comparisonFrameHeight = parseFloat(frameHeight, 10) * fontSize;
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} else if (frameHeight.endsWith("px")) {
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comparisonFrameHeight = parseFloat(frameHeight, 10);
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} else {
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Cu.reportError("This dialog (" + this._frame.contentWindow.location.href + ") " +
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"set a height in non-px-non-em units ('" + frameHeight + "'), " +
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"which is likely to lead to bad sizing in in-content preferences. " +
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"Please consider changing this.");
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comparisonFrameHeight = parseFloat(frameHeight);
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}
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if (comparisonFrameHeight > maxHeight) {
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// If the height is bigger than that of the window, we should let the contents scroll:
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frameHeight = maxHeight + "px";
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frameMinHeight = maxHeight + "px";
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let containers = this._frame.contentDocument.querySelectorAll('.largeDialogContainer');
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for (let container of containers) {
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container.classList.add("doScroll");
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}
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}
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this._frame.style.height = frameHeight;
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this._box.style.minHeight = "calc(" +
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(boxVerticalBorder + groupBoxTitleHeight + boxVerticalPadding) +
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"px + " + frameMinHeight + ")";
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this._overlay.style.visibility = "visible";
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this._overlay.style.opacity = ""; // XXX: focus hack continued from _onContentLoaded
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this._resizeObserver = new MutationObserver(this._onResize);
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this._resizeObserver.observe(this._box, {attributes: true});
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this._trapFocus();
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},
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_onResize: function(mutations) {
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let frame = gSubDialog._frame;
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// The width and height styles are needed for the initial
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// layout of the frame, but afterward they need to be removed
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// or their presence will restrict the contents of the <browser>
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// from resizing to a smaller size.
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frame.style.removeProperty("width");
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frame.style.removeProperty("height");
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let docEl = frame.contentDocument.documentElement;
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let persistedAttributes = docEl.getAttribute("persist");
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if (!persistedAttributes ||
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(!persistedAttributes.includes("width") &&
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!persistedAttributes.includes("height"))) {
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return;
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}
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for (let mutation of mutations) {
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if (mutation.attributeName == "width") {
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docEl.setAttribute("width", docEl.scrollWidth);
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} else if (mutation.attributeName == "height") {
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docEl.setAttribute("height", docEl.scrollHeight);
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}
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}
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},
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_onDialogClosing: function(aEvent) {
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this._frame.contentWindow.removeEventListener("dialogclosing", this);
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this._closingEvent = aEvent;
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},
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_onKeyDown: function(aEvent) {
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if (aEvent.currentTarget == window && aEvent.keyCode == aEvent.DOM_VK_ESCAPE &&
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!aEvent.defaultPrevented) {
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this.close(aEvent);
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return;
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}
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if (aEvent.keyCode != aEvent.DOM_VK_TAB ||
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aEvent.ctrlKey || aEvent.altKey || aEvent.metaKey) {
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return;
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}
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let fm = Services.focus;
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function isLastFocusableElement(el) {
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//XXXgijs unfortunately there is no way to get the last focusable element without asking
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// the focus manager to move focus to it.
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let rv = el == fm.moveFocus(gSubDialog._frame.contentWindow, null, fm.MOVEFOCUS_LAST, 0);
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fm.setFocus(el, 0);
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return rv;
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}
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let forward = !aEvent.shiftKey;
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// check if focus is leaving the frame (incl. the close button):
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if ((aEvent.target == this._closeButton && !forward) ||
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(isLastFocusableElement(aEvent.originalTarget) && forward)) {
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aEvent.preventDefault();
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aEvent.stopImmediatePropagation();
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let parentWin = this._getBrowser().ownerGlobal;
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if (forward) {
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fm.moveFocus(parentWin, null, fm.MOVEFOCUS_FIRST, fm.FLAG_BYKEY);
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} else {
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// Somehow, moving back 'past' the opening doc is not trivial. Cheat by doing it in 2 steps:
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fm.moveFocus(window, null, fm.MOVEFOCUS_ROOT, fm.FLAG_BYKEY);
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fm.moveFocus(parentWin, null, fm.MOVEFOCUS_BACKWARD, fm.FLAG_BYKEY);
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}
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}
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},
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_onParentWinFocus: function(aEvent) {
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// Explicitly check for the focus target of |window| to avoid triggering this when the window
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// is refocused
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if (aEvent.target != this._closeButton && aEvent.target != window) {
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this._closeButton.focus();
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}
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},
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_addDialogEventListeners: function() {
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// Make the close button work.
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this._closeButton.addEventListener("command", this);
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// DOMTitleChanged isn't fired on the frame, only on the chromeEventHandler
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let chromeBrowser = this._getBrowser();
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chromeBrowser.addEventListener("DOMTitleChanged", this, true);
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// Similarly DOMFrameContentLoaded only fires on the top window
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window.addEventListener("DOMFrameContentLoaded", this, true);
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// Wait for the stylesheets injected during DOMContentLoaded to load before showing the dialog
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// otherwise there is a flicker of the stylesheet applying.
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this._frame.addEventListener("load", this);
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chromeBrowser.addEventListener("unload", this, true);
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// Ensure we get <esc> keypresses even if nothing in the subdialog is focusable
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// (happens on OS X when only text inputs and lists are focusable, and
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// the subdialog only has checkboxes/radiobuttons/buttons)
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window.addEventListener("keydown", this, true);
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},
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_removeDialogEventListeners: function() {
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let chromeBrowser = this._getBrowser();
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chromeBrowser.removeEventListener("DOMTitleChanged", this, true);
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chromeBrowser.removeEventListener("unload", this, true);
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this._closeButton.removeEventListener("command", this);
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window.removeEventListener("DOMFrameContentLoaded", this, true);
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this._frame.removeEventListener("load", this);
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this._frame.contentWindow.removeEventListener("dialogclosing", this);
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window.removeEventListener("keydown", this, true);
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if (this._resizeObserver) {
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this._resizeObserver.disconnect();
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this._resizeObserver = null;
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}
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this._untrapFocus();
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},
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_trapFocus: function() {
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let fm = Services.focus;
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fm.moveFocus(this._frame.contentWindow, null, fm.MOVEFOCUS_FIRST, 0);
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this._frame.contentDocument.addEventListener("keydown", this, true);
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this._closeButton.addEventListener("keydown", this);
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window.addEventListener("focus", this, true);
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},
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_untrapFocus: function() {
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this._frame.contentDocument.removeEventListener("keydown", this, true);
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this._closeButton.removeEventListener("keydown", this);
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window.removeEventListener("focus", this);
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},
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_getBrowser: function() {
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return window.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebNavigation)
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.QueryInterface(Ci.nsIDocShell)
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.chromeEventHandler;
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},
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};
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