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/* 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/. */
/*
* Chrome side handling of form validation popup.
*/
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
BrowserWindowTracker: "resource:///modules/BrowserWindowTracker.sys.mjs",
});
class PopupShownObserver {
_weakContext = null;
constructor(browsingContext) {
this._weakContext = Cu.getWeakReference(browsingContext);
}
observe(subject, topic) {
let ctxt = this._weakContext.get();
let actor = ctxt.currentWindowGlobal?.getExistingActor("FormValidation");
if (!actor) {
Services.obs.removeObserver(this, "popup-shown");
return;
}
// If any panel besides ourselves shows, hide ourselves again.
if (topic == "popup-shown" && subject != actor._panel) {
actor._hidePopup();
}
}
QueryInterface = ChromeUtils.generateQI([
Ci.nsIObserver,
Ci.nsISupportsWeakReference,
]);
}
export class FormValidationParent extends JSWindowActorParent {
constructor() {
super();
this._panel = null;
this._obs = null;
}
static hasOpenPopups() {
for (let win of lazy.BrowserWindowTracker.orderedWindows) {
let popups = win.document.querySelectorAll("panel,menupopup");
for (let popup of popups) {
let { state } = popup;
if (state == "open" || state == "showing") {
return true;
}
}
}
return false;
}
/*
* Public apis
*/
uninit() {
this._panel = null;
this._obs = null;
}
hidePopup() {
this._hidePopup();
}
/*
* Events
*/
receiveMessage(aMessage) {
switch (aMessage.name) {
case "FormValidation:ShowPopup":
let browser = this.browsingContext.top.embedderElement;
let window = browser.ownerGlobal;
let data = aMessage.data;
let tabBrowser = window.gBrowser;
// target is the <browser>, make sure we're receiving a message
// from the foreground tab.
if (tabBrowser && browser != tabBrowser.selectedBrowser) {
return;
}
if (FormValidationParent.hasOpenPopups()) {
return;
}
this._showPopup(browser, data);
break;
case "FormValidation:HidePopup":
this._hidePopup();
break;
}
}
handleEvent(aEvent) {
switch (aEvent.type) {
case "FullZoomChange":
case "TextZoomChange":
case "scroll":
this._hidePopup();
break;
case "popuphidden":
this._onPopupHidden(aEvent);
break;
}
}
/*
* Internal
*/
_onPopupHidden(aEvent) {
aEvent.originalTarget.removeEventListener("popuphidden", this, true);
Services.obs.removeObserver(this._obs, "popup-shown");
let tabBrowser = aEvent.originalTarget.ownerGlobal.gBrowser;
tabBrowser.selectedBrowser.removeEventListener("scroll", this, true);
tabBrowser.selectedBrowser.removeEventListener("FullZoomChange", this);
tabBrowser.selectedBrowser.removeEventListener("TextZoomChange", this);
this._obs = null;
this._panel = null;
}
/*
* Shows the form validation popup at a specified position or updates the
* messaging and position if the popup is already displayed.
*
* @aBrowser - Browser element that requests the popup.
* @aPanelData - Object that contains popup information
* aPanelData stucture detail:
* screenRect - the screen rect of the target element.
* position - popup positional string constants.
* message - the form element validation message text.
*/
_showPopup(aBrowser, aPanelData) {
let previouslyShown = !!this._panel;
this._panel = this._getAndMaybeCreatePanel();
this._panel.firstChild.textContent = aPanelData.message;
// Display the panel if it isn't already visible.
if (previouslyShown) {
return;
}
// Cleanup after the popup is hidden
this._panel.addEventListener("popuphidden", this, true);
// Hide ourselves if other popups shown
this._obs = new PopupShownObserver(this.browsingContext);
Services.obs.addObserver(this._obs, "popup-shown", true);
// Hide if the user scrolls the page
aBrowser.addEventListener("scroll", this, true);
aBrowser.addEventListener("FullZoomChange", this);
aBrowser.addEventListener("TextZoomChange", this);
aBrowser.constrainPopup(this._panel);
// Open the popup
let rect = aPanelData.screenRect;
this._panel.openPopupAtScreenRect(
aPanelData.position,
rect.left,
rect.top,
rect.width,
rect.height,
false,
false
);
}
/*
* Hide the popup if currently displayed. Will fire an event to onPopupHiding
* above if visible.
*/
_hidePopup() {
this._panel?.hidePopup();
}
_getAndMaybeCreatePanel() {
// Lazy load the invalid form popup the first time we need to display it.
if (!this._panel) {
let browser = this.browsingContext.top.embedderElement;
let window = browser.ownerGlobal;
let template = window.document.getElementById("invalidFormTemplate");
if (template) {
template.replaceWith(template.content);
}
this._panel = window.document.getElementById("invalid-form-popup");
}
return this._panel;
}
}
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