mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
373 lines
11 KiB
JavaScript
373 lines
11 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* 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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dump("###################################### forms.js loaded\n");
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let Ci = Components.interfaces;
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let Cc = Components.classes;
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let Cu = Components.utils;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import('resource://gre/modules/XPCOMUtils.jsm');
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XPCOMUtils.defineLazyServiceGetter(Services, "fm",
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"@mozilla.org/focus-manager;1",
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"nsIFocusManager");
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XPCOMUtils.defineLazyGetter(this, "domWindowUtils", function () {
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return content.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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});
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const FOCUS_CHANGE_DELAY = 20;
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let HTMLInputElement = Ci.nsIDOMHTMLInputElement;
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let HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement;
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let HTMLSelectElement = Ci.nsIDOMHTMLSelectElement;
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let HTMLOptGroupElement = Ci.nsIDOMHTMLOptGroupElement;
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let HTMLOptionElement = Ci.nsIDOMHTMLOptionElement;
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let FormAssistant = {
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init: function fa_init() {
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addEventListener("focus", this, true, false);
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addEventListener("blur", this, true, false);
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addEventListener("resize", this, true, false);
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addMessageListener("Forms:Select:Choice", this);
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addMessageListener("Forms:Input:Value", this);
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addMessageListener("Forms:Select:Blur", this);
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Services.obs.addObserver(this, "ime-enabled-state-changed", false);
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Services.obs.addObserver(this, "xpcom-shutdown", false);
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},
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ignoredInputTypes: new Set([
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'button', 'file', 'checkbox', 'radio', 'reset', 'submit', 'image'
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]),
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isKeyboardOpened: false,
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selectionStart: 0,
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selectionEnd: 0,
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_focusedElement: null,
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get focusedElement() {
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if (this._focusedElement && Cu.isDeadWrapper(this._focusedElement))
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this._focusedElement = null;
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return this._focusedElement;
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},
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set focusedElement(val) {
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this._focusedElement = val;
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},
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setFocusedElement: function fa_setFocusedElement(element) {
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if (element === this.focusedElement)
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return;
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if (this.focusedElement) {
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this.focusedElement.removeEventListener('mousedown', this);
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this.focusedElement.removeEventListener('mouseup', this);
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if (!element) {
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this.focusedElement.blur();
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}
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}
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if (element) {
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element.addEventListener('mousedown', this);
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element.addEventListener('mouseup', this);
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}
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this.focusedElement = element;
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},
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handleEvent: function fa_handleEvent(evt) {
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let focusedElement = this.focusedElement;
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let target = evt.target;
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switch (evt.type) {
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case "focus":
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if (this.isIMEDisabled())
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return;
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if (target && this.isFocusableElement(target)) {
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if (this.blurTimeout) {
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this.blurTimeout = content.clearTimeout(this.blurTimeout);
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this.handleIMEStateDisabled();
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}
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this.handleIMEStateEnabled(target);
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}
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break;
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case "blur":
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if (this.focusedElement) {
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this.blurTimeout = content.setTimeout(function () {
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this.blurTimeout = null;
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this.handleIMEStateDisabled();
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}.bind(this), FOCUS_CHANGE_DELAY);
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}
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break;
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case 'mousedown':
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// We only listen for this event on the currently focused element.
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// When the mouse goes down, note the cursor/selection position
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this.selectionStart = this.focusedElement.selectionStart;
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this.selectionEnd = this.focusedElement.selectionEnd;
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break;
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case 'mouseup':
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// We only listen for this event on the currently focused element.
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// When the mouse goes up, see if the cursor has moved (or the
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// selection changed) since the mouse went down. If it has, we
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// need to tell the keyboard about it
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if (this.focusedElement.selectionStart !== this.selectionStart ||
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this.focusedElement.selectionEnd !== this.selectionEnd) {
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this.tryShowIme(this.focusedElement);
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}
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break;
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case "resize":
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if (!this.isKeyboardOpened)
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return;
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if (this.focusedElement) {
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this.focusedElement.scrollIntoView(false);
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}
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break;
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}
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},
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receiveMessage: function fa_receiveMessage(msg) {
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let target = this.focusedElement;
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if (!target) {
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return;
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}
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let json = msg.json;
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switch (msg.name) {
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case "Forms:Input:Value": {
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target.value = json.value;
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let event = content.document.createEvent('HTMLEvents');
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event.initEvent('input', true, false);
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target.dispatchEvent(event);
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break;
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}
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case "Forms:Select:Choice":
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let options = target.options;
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let valueChanged = false;
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if ("index" in json) {
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if (options.selectedIndex != json.index) {
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options.selectedIndex = json.index;
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valueChanged = true;
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}
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} else if ("indexes" in json) {
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for (let i = 0; i < options.length; i++) {
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let newValue = (json.indexes.indexOf(i) != -1);
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if (options.item(i).selected != newValue) {
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options.item(i).selected = newValue;
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valueChanged = true;
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}
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}
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}
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// only fire onchange event if any selected option is changed
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if (valueChanged) {
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let event = content.document.createEvent('HTMLEvents');
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event.initEvent('change', true, true);
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target.dispatchEvent(event);
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}
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break;
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case "Forms:Select:Blur": {
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this.setFocusedElement(null);
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break;
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}
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}
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},
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observe: function fa_observe(subject, topic, data) {
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switch (topic) {
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case "ime-enabled-state-changed":
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let shouldOpen = parseInt(data);
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let target = Services.fm.focusedElement;
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if (!target)
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return;
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if (shouldOpen) {
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if (!this.focusedElement && this.isFocusableElement(target))
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this.handleIMEStateEnabled(target);
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} else if (this._focusedElement == target) {
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this.handleIMEStateDisabled();
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}
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break;
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case "xpcom-shutdown":
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Services.obs.removeObserver(this, "ime-enabled-state-changed", false);
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Services.obs.removeObserver(this, "xpcom-shutdown");
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removeMessageListener("Forms:Select:Choice", this);
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removeMessageListener("Forms:Input:Value", this);
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break;
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}
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},
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isIMEDisabled: function fa_isIMEDisabled() {
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let disabled = false;
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try {
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disabled = domWindowUtils.IMEStatus == domWindowUtils.IME_STATUS_DISABLED;
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} catch (e) {}
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return disabled;
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},
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handleIMEStateEnabled: function fa_handleIMEStateEnabled(target) {
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if (this.isKeyboardOpened)
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return;
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if (target instanceof HTMLOptionElement)
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target = target.parentNode;
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let kbOpened = this.tryShowIme(target);
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if (target instanceof HTMLInputElement ||
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target instanceof HTMLTextAreaElement)
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this.isKeyboardOpened = kbOpened;
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this.setFocusedElement(target);
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},
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handleIMEStateDisabled: function fa_handleIMEStateDisabled() {
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sendAsyncMessage("Forms:Input", { "type": "blur" });
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this.isKeyboardOpened = false;
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this.setFocusedElement(null);
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},
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isFocusableElement: function fa_isFocusableElement(element) {
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if (element instanceof HTMLSelectElement ||
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element instanceof HTMLTextAreaElement)
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return true;
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if (element instanceof HTMLOptionElement &&
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element.parentNode instanceof HTMLSelectElement)
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return true;
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return (element instanceof HTMLInputElement &&
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!this.ignoredInputTypes.has(element.type));
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},
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tryShowIme: function(element) {
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// FIXME/bug 729623: work around apparent bug in the IME manager
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// in gecko.
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let readonly = element.getAttribute("readonly");
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if (readonly) {
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return false;
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}
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sendAsyncMessage("Forms:Input", getJSON(element));
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return true;
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}
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};
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FormAssistant.init();
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function getJSON(element) {
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let type = element.type || "";
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// Until the input type=date/datetime/time have been implemented
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// let's return their real type even if the platform returns 'text'
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// Related to Bug 769352 - Implement <input type=date>
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// Related to Bug 777279 - Implement <input type=time>
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let attributeType = element.getAttribute("type") || "";
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if (attributeType) {
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var typeLowerCase = attributeType.toLowerCase();
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switch (typeLowerCase) {
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case "date":
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case "time":
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case "datetime":
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case "datetime-local":
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type = typeLowerCase;
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break;
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}
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}
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// Gecko supports the inputmode attribute on text fields (but not textareas).
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// But it doesn't recognize "verbatim" and other modes that we're interested
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// in in Gaia, and the inputmode property returns "auto" for any value
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// that gecko does not support. So we must query the inputmode attribute
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// with getAttribute() rather than just using the inputmode property here.
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// See https://bugzilla.mozilla.org/show_bug.cgi?id=746142
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let inputmode = element.getAttribute('inputmode');
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if (inputmode) {
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inputmode = inputmode.toLowerCase();
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} else {
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inputmode = '';
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}
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return {
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"type": type.toLowerCase(),
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"choices": getListForElement(element),
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"value": element.value,
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"inputmode": inputmode,
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"selectionStart": element.selectionStart,
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"selectionEnd": element.selectionEnd
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};
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}
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function getListForElement(element) {
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if (!(element instanceof HTMLSelectElement))
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return null;
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let optionIndex = 0;
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let result = {
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"multiple": element.multiple,
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"choices": []
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};
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// Build up a flat JSON array of the choices.
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// In HTML, it's possible for select element choices to be under a
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// group header (but not recursively). We distinguish between headers
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// and entries using the boolean "list.group".
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let children = element.children;
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for (let i = 0; i < children.length; i++) {
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let child = children[i];
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if (child instanceof HTMLOptGroupElement) {
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result.choices.push({
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"group": true,
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"text": child.label || child.firstChild.data,
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"disabled": child.disabled
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});
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let subchildren = child.children;
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for (let j = 0; j < subchildren.length; j++) {
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let subchild = subchildren[j];
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result.choices.push({
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"group": false,
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"inGroup": true,
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"text": subchild.text,
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"disabled": child.disabled || subchild.disabled,
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"selected": subchild.selected,
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"optionIndex": optionIndex++
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});
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}
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} else if (child instanceof HTMLOptionElement) {
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result.choices.push({
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"group": false,
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"inGroup": false,
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"text": child.text,
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"disabled": child.disabled,
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"selected": child.selected,
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"optionIndex": optionIndex++
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});
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}
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}
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return result;
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};
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