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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.
+ */
+
+"use strict";
+
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cu = Components.utils;
+
+this.EXPORTED_SYMBOLS = [ "FormValidationHandler" ];
+
+Cu.import("resource://gre/modules/Services.jsm");
+
+var FormValidationHandler =
+{
+ _panel: null,
+ _anchor: null,
+
+ /*
+ * Public apis
+ */
+
+ init() {
+ let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
+ mm.addMessageListener("FormValidation:ShowPopup", this);
+ mm.addMessageListener("FormValidation:HidePopup", this);
+ },
+
+ uninit() {
+ let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
+ mm.removeMessageListener("FormValidation:ShowPopup", this);
+ mm.removeMessageListener("FormValidation:HidePopup", this);
+ this._panel = null;
+ this._anchor = null;
+ },
+
+ hidePopup() {
+ this._hidePopup();
+ },
+
+ /*
+ * Events
+ */
+
+ receiveMessage(aMessage) {
+ let window = aMessage.target.ownerGlobal;
+ let json = aMessage.json;
+ let tabBrowser = window.gBrowser;
+ switch (aMessage.name) {
+ case "FormValidation:ShowPopup":
+ // target is the <browser>, make sure we're receiving a message
+ // from the foreground tab.
+ if (tabBrowser && aMessage.target != tabBrowser.selectedBrowser) {
+ return;
+ }
+ this._showPopup(window, json);
+ break;
+ case "FormValidation:HidePopup":
+ this._hidePopup();
+ break;
+ }
+ },
+
+ observe(aSubject, aTopic, aData) {
+ this._hidePopup();
+ },
+
+ handleEvent(aEvent) {
+ switch (aEvent.type) {
+ case "FullZoomChange":
+ case "TextZoomChange":
+ case "ZoomChangeUsingMouseWheel":
+ case "scroll":
+ this._hidePopup();
+ break;
+ case "popuphiding":
+ this._onPopupHiding(aEvent);
+ break;
+ }
+ },
+
+ /*
+ * Internal
+ */
+
+ _onPopupHiding(aEvent) {
+ aEvent.originalTarget.removeEventListener("popuphiding", this, true);
+ let tabBrowser = aEvent.originalTarget.ownerDocument.getElementById("content");
+ tabBrowser.selectedBrowser.removeEventListener("scroll", this, true);
+ tabBrowser.selectedBrowser.removeEventListener("FullZoomChange", this);
+ tabBrowser.selectedBrowser.removeEventListener("TextZoomChange", this);
+ tabBrowser.selectedBrowser.removeEventListener("ZoomChangeUsingMouseWheel", this);
+
+ this._panel.hidden = true;
+ this._panel = null;
+ this._anchor.hidden = true;
+ this._anchor = null;
+ },
+
+ /*
+ * Shows the form validation popup at a specified position or updates the
+ * messaging and position if the popup is already displayed.
+ *
+ * @aWindow - the chrome window
+ * @aPanelData - Object that contains popup information
+ * aPanelData stucture detail:
+ * contentRect - the bounding client rect of the target element. If
+ * content is remote, this is relative to the browser, otherwise its
+ * relative to the window.
+ * position - popup positional string constants.
+ * message - the form element validation message text.
+ */
+ _showPopup(aWindow, aPanelData) {
+ let previouslyShown = !!this._panel;
+ this._panel = aWindow.document.getElementById("invalid-form-popup");
+ this._panel.firstChild.textContent = aPanelData.message;
+ this._panel.hidden = false;
+
+ let tabBrowser = aWindow.gBrowser;
+ this._anchor = tabBrowser.popupAnchor;
+ this._anchor.left = aPanelData.contentRect.left;
+ this._anchor.top = aPanelData.contentRect.top;
+ this._anchor.width = aPanelData.contentRect.width;
+ this._anchor.height = aPanelData.contentRect.height;
+ this._anchor.hidden = false;
+
+ // Display the panel if it isn't already visible.
+ if (!previouslyShown) {
+ // Cleanup after the popup is hidden
+ this._panel.addEventListener("popuphiding", this, true);
+
+ // Hide if the user scrolls the page
+ tabBrowser.selectedBrowser.addEventListener("scroll", this, true);
+ tabBrowser.selectedBrowser.addEventListener("FullZoomChange", this);
+ tabBrowser.selectedBrowser.addEventListener("TextZoomChange", this);
+ tabBrowser.selectedBrowser.addEventListener("ZoomChangeUsingMouseWheel", this);
+
+ // Open the popup
+ this._panel.openPopup(this._anchor, aPanelData.position, 0, 0, false);
+ }
+ },
+
+ /*
+ * Hide the popup if currently displayed. Will fire an event to onPopupHiding
+ * above if visible.
+ */
+ _hidePopup() {
+ if (this._panel) {
+ this._panel.hidePopup();
+ }
+ }
+};