mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
740 lines
24 KiB
JavaScript
740 lines
24 KiB
JavaScript
// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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let Ci = Components.interfaces;
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let Cc = Components.classes;
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dump("### FormHelper.js loaded\n");
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let HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement;
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let HTMLInputElement = Ci.nsIDOMHTMLInputElement;
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let HTMLSelectElement = Ci.nsIDOMHTMLSelectElement;
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let HTMLIFrameElement = Ci.nsIDOMHTMLIFrameElement;
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let HTMLDocument = Ci.nsIDOMHTMLDocument;
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let HTMLHtmlElement = Ci.nsIDOMHTMLHtmlElement;
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let HTMLBodyElement = Ci.nsIDOMHTMLBodyElement;
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let HTMLLabelElement = Ci.nsIDOMHTMLLabelElement;
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let HTMLButtonElement = Ci.nsIDOMHTMLButtonElement;
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let HTMLOptGroupElement = Ci.nsIDOMHTMLOptGroupElement;
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let HTMLOptionElement = Ci.nsIDOMHTMLOptionElement;
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let XULMenuListElement = Ci.nsIDOMXULMenuListElement;
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/**
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* Responsible of navigation between forms fields and of the opening of the assistant
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*/
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function FormAssistant() {
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addMessageListener("FormAssist:Closed", this);
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addMessageListener("FormAssist:ChoiceSelect", this);
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addMessageListener("FormAssist:ChoiceChange", this);
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addMessageListener("FormAssist:AutoComplete", this);
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addMessageListener("FormAssist:Update", this);
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/* Listen text events in order to update the autocomplete suggestions as soon
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* a key is entered on device
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*/
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addEventListener("text", this, false);
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addEventListener("keypress", this, true);
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addEventListener("keyup", this, false);
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addEventListener("focus", this, true);
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addEventListener("blur", this, true);
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addEventListener("pageshow", this, false);
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addEventListener("pagehide", this, false);
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addEventListener("submit", this, false);
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};
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FormAssistant.prototype = {
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_els: Cc["@mozilla.org/eventlistenerservice;1"].getService(Ci.nsIEventListenerService),
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_open: false,
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_focusSync: false,
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_debugEvents: false,
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_selectWrapper: null,
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_currentElement: null,
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invalidSubmit: false,
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get focusSync() {
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return this._focusSync;
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},
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set focusSync(aVal) {
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this._focusSync = aVal;
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},
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get currentElement() {
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return this._currentElement;
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},
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set currentElement(aElement) {
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if (!aElement || !this._isVisibleElement(aElement)) {
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return null;
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}
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this._currentElement = aElement;
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gFocusManager.setFocus(this._currentElement, Ci.nsIFocusManager.FLAG_NOSCROLL);
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// To ensure we get the current caret positionning of the focused
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// element we need to delayed a bit the event
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this._executeDelayed(function(self) {
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// Bug 640870
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// Sometimes the element inner frame get destroyed while the element
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// receive the focus because the display is turned to 'none' for
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// example, in this "fun" case just do nothing if the element is hidden
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if (self._isVisibleElement(gFocusManager.focusedElement))
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sendAsyncMessage("FormAssist:Show", self._getJSON());
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});
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return this._currentElement;
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},
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open: function formHelperOpen(aElement, aEvent) {
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// If the click is on an option element we want to check if the parent
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// is a valid target.
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if (aElement instanceof HTMLOptionElement &&
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aElement.parentNode instanceof HTMLSelectElement &&
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!aElement.disabled) {
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aElement = aElement.parentNode;
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}
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// Don't show the formhelper popup for multi-select boxes, except for touch.
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if (aElement instanceof HTMLSelectElement && aEvent) {
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if ((aElement.multiple || aElement.size > 1) &&
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aEvent.mozInputSource != Ci.nsIDOMMouseEvent.MOZ_SOURCE_TOUCH) {
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return false;
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}
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// Don't fire mouse events on selects; see bug 685197.
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aEvent.preventDefault()
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aEvent.stopPropagation()
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}
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// The form assistant will close if a click happen:
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// * outside of the scope of the form helper
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// * hover a button of type=[image|submit]
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// * hover a disabled element
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if (!this._isValidElement(aElement)) {
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let passiveButtons = { button: true, checkbox: true, file: true, radio: true, reset: true };
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if ((aElement instanceof HTMLInputElement || aElement instanceof HTMLButtonElement) &&
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passiveButtons[aElement.type] && !aElement.disabled)
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return false;
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return this.close();
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}
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// Look for a top editable element
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if (this._isEditable(aElement)) {
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aElement = this._getTopLevelEditable(aElement);
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}
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// We only work with choice lists or elements with autocomplete suggestions
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if (!this._isSelectElement(aElement) &&
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!this._isAutocomplete(aElement)) {
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return this.close();
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}
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// Enable the assistant
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this.currentElement = aElement;
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return this._open = true;
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},
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close: function close() {
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if (this._open) {
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this._currentElement = null;
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sendAsyncMessage("FormAssist:Hide", { });
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this._open = false;
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}
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return this._open;
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},
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receiveMessage: function receiveMessage(aMessage) {
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if (this._debugEvents) Util.dumpLn(aMessage.name);
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let currentElement = this.currentElement;
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if ((!this._isAutocomplete(currentElement) &&
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!getWrapperForElement(currentElement)) ||
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!currentElement) {
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return;
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}
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let json = aMessage.json;
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switch (aMessage.name) {
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case "FormAssist:ChoiceSelect": {
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this._selectWrapper = getWrapperForElement(currentElement);
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this._selectWrapper.select(json.index, json.selected);
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break;
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}
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case "FormAssist:ChoiceChange": {
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// ChoiceChange could happened once we have move to another element or
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// to nothing, so we should keep the used wrapper in mind.
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this._selectWrapper.fireOnChange();
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// New elements can be shown when a select is updated so we need to
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// reconstruct the inner elements array and to take care of possible
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// focus change, this is why we use "self.currentElement" instead of
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// using directly "currentElement".
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this._executeDelayed(function(self) {
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let currentElement = self.currentElement;
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if (!currentElement)
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return;
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self._currentElement = currentElement;
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});
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break;
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}
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case "FormAssist:AutoComplete": {
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try {
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currentElement = currentElement.QueryInterface(Ci.nsIDOMNSEditableElement);
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let imeEditor = currentElement.editor.QueryInterface(Ci.nsIEditorIMESupport);
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if (imeEditor.composing)
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imeEditor.forceCompositionEnd();
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}
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catch(e) {}
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currentElement.value = json.value;
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let event = currentElement.ownerDocument.createEvent("Events");
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event.initEvent("DOMAutoComplete", true, true);
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currentElement.dispatchEvent(event);
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break;
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}
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case "FormAssist:Closed":
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currentElement.blur();
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this._open = false;
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break;
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case "FormAssist:Update":
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sendAsyncMessage("FormAssist:Show", this._getJSON());
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break;
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}
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},
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handleEvent: function formHelperHandleEvent(aEvent) {
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if (this._debugEvents) Util.dumpLn(aEvent.type, this.currentElement);
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// focus changes should be taken into account only if the user has done a
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// manual operation like manually clicking
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let shouldIgnoreFocus = (aEvent.type == "focus" && !this._open && !this.focusSync);
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if ((!this._open && aEvent.type != "focus") || shouldIgnoreFocus) {
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return;
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}
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let currentElement = this.currentElement;
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switch (aEvent.type) {
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case "submit":
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// submit is a final action and the form assistant should be closed
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this.close();
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break;
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case "pagehide":
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case "pageshow":
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// When reacting to a page show/hide, if the focus is different this
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// could mean the web page has dramatically changed because of
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// an Ajax change based on fragment identifier
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if (gFocusManager.focusedElement != currentElement)
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this.close();
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break;
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case "focus":
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let focusedElement =
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gFocusManager.getFocusedElementForWindow(content, true, {}) ||
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aEvent.target;
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// If a body element is editable and the body is the child of an
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// iframe we can assume this is an advanced HTML editor, so let's
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// redirect the form helper selection to the iframe element
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if (focusedElement && this._isEditable(focusedElement)) {
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let editableElement = this._getTopLevelEditable(focusedElement);
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if (this._isValidElement(editableElement)) {
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this._executeDelayed(function(self) {
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self.open(editableElement);
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});
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}
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return;
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}
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// if an element is focused while we're closed but the element can be handle
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// by the assistant, try to activate it (only during mouseup)
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if (!currentElement) {
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if (focusedElement && this._isValidElement(focusedElement)) {
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this._executeDelayed(function(self) {
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self.open(focusedElement);
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});
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}
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return;
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}
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if (this._currentElement != focusedElement)
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this.currentElement = focusedElement;
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break;
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case "blur":
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content.setTimeout(function(self) {
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if (!self._open)
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return;
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// If the blurring causes focus be in no other element,
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// we should close the form assistant.
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let focusedElement = gFocusManager.getFocusedElementForWindow(content, true, {});
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if (!focusedElement)
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self.close();
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}, 0, this);
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break;
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case "text":
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if (this._isAutocomplete(aEvent.target))
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sendAsyncMessage("FormAssist:AutoComplete", this._getJSON());
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break;
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case "keyup":
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// There is no need to handle keys if there is not element currently
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// used by the form assistant
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if (!currentElement)
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return;
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if (this._isAutocomplete(aEvent.target)) {
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sendAsyncMessage("FormAssist:AutoComplete", this._getJSON());
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}
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let caretRect = this._getCaretRect();
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if (!caretRect.isEmpty())
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sendAsyncMessage("FormAssist:Update", { caretRect: caretRect });
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}
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},
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_executeDelayed: function formHelperExecuteSoon(aCallback) {
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let self = this;
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let timer = new Util.Timeout(function() {
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aCallback(self);
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});
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timer.once(0);
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},
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_isEditable: function formHelperIsEditable(aElement) {
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if (!aElement)
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return false;
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let canEdit = false;
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if (aElement.isContentEditable || aElement.designMode == "on") {
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canEdit = true;
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} else if (aElement instanceof HTMLIFrameElement &&
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(aElement.contentDocument.body.isContentEditable ||
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aElement.contentDocument.designMode == "on")) {
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canEdit = true;
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} else {
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canEdit = aElement.ownerDocument && aElement.ownerDocument.designMode == "on";
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}
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return canEdit;
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},
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_getTopLevelEditable: function formHelperGetTopLevelEditable(aElement) {
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if (!(aElement instanceof HTMLIFrameElement)) {
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let element = aElement;
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// Retrieve the top element that is editable
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if (element instanceof HTMLHtmlElement)
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element = element.ownerDocument.body;
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else if (element instanceof HTMLDocument)
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element = element.body;
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while (element && !this._isEditable(element))
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element = element.parentNode;
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// Return the container frame if we are into a nested editable frame
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if (element && element instanceof HTMLBodyElement && element.ownerDocument.defaultView != content.document.defaultView)
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return element.ownerDocument.defaultView.frameElement;
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}
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return aElement;
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},
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_isAutocomplete: function formHelperIsAutocomplete(aElement) {
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if (aElement instanceof HTMLInputElement) {
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if (aElement.getAttribute("type") == "password")
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return false;
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let autocomplete = aElement.getAttribute("autocomplete");
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let allowedValues = ["off", "false", "disabled"];
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if (allowedValues.indexOf(autocomplete) == -1)
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return true;
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}
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return false;
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},
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/*
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* This function is similar to getListSuggestions from
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* components/satchel/src/nsInputListAutoComplete.js but sadly this one is
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* used by the autocomplete.xml binding which is not in used in fennec
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*/
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_getListSuggestions: function formHelperGetListSuggestions(aElement) {
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if (!(aElement instanceof HTMLInputElement) || !aElement.list)
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return [];
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let suggestions = [];
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let filter = !aElement.hasAttribute("mozNoFilter");
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let lowerFieldValue = aElement.value.toLowerCase();
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let options = aElement.list.options;
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let length = options.length;
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for (let i = 0; i < length; i++) {
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let item = options.item(i);
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let label = item.value;
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if (item.label)
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label = item.label;
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else if (item.text)
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label = item.text;
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if (filter && label.toLowerCase().indexOf(lowerFieldValue) == -1)
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continue;
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suggestions.push({ label: label, value: item.value });
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}
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return suggestions;
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},
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_isValidElement: function formHelperIsValidElement(aElement) {
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if (!aElement.getAttribute)
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return false;
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let formExceptions = { button: true, checkbox: true, file: true, image: true, radio: true, reset: true, submit: true };
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if (aElement instanceof HTMLInputElement && formExceptions[aElement.type])
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return false;
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if (aElement instanceof HTMLButtonElement ||
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(aElement.getAttribute("role") == "button" && aElement.hasAttribute("tabindex")))
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return false;
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return this._isNavigableElement(aElement) && this._isVisibleElement(aElement);
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},
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_isNavigableElement: function formHelperIsNavigableElement(aElement) {
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if (aElement.disabled || aElement.getAttribute("tabindex") == "-1")
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return false;
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if (aElement.getAttribute("role") == "button" && aElement.hasAttribute("tabindex"))
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return true;
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if (this._isSelectElement(aElement) || aElement instanceof HTMLTextAreaElement)
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return true;
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if (aElement instanceof HTMLInputElement || aElement instanceof HTMLButtonElement)
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return !(aElement.type == "hidden");
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return this._isEditable(aElement);
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},
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_isVisibleElement: function formHelperIsVisibleElement(aElement) {
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let style = aElement ? aElement.ownerDocument.defaultView.getComputedStyle(aElement, null) : null;
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if (!style)
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return false;
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let isVisible = (style.getPropertyValue("visibility") != "hidden");
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let isOpaque = (style.getPropertyValue("opacity") != 0);
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let rect = aElement.getBoundingClientRect();
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// Since the only way to show a drop-down menu for a select when the form
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// assistant is enabled is to return true here, a select is allowed to have
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// an opacity to 0 in order to let web developpers add a custom design on
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// top of it. This is less important to use the form assistant for the
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// other types of fields because even if the form assistant won't fired,
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// the focus will be in and a VKB will popup if needed
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return isVisible && (isOpaque || this._isSelectElement(aElement)) && (rect.height != 0 || rect.width != 0);
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},
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_isSelectElement: function formHelperIsSelectElement(aElement) {
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return (aElement instanceof HTMLSelectElement || aElement instanceof XULMenuListElement);
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},
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/** Caret is used to input text for this element. */
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_getCaretRect: function _formHelperGetCaretRect() {
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let element = this.currentElement;
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let focusedElement = gFocusManager.getFocusedElementForWindow(content, true, {});
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if (element && (element.mozIsTextField && element.mozIsTextField(false) ||
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element instanceof HTMLTextAreaElement) && focusedElement == element && this._isVisibleElement(element)) {
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let utils = Util.getWindowUtils(element.ownerDocument.defaultView);
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let rect = utils.sendQueryContentEvent(utils.QUERY_CARET_RECT, element.selectionEnd, 0, 0, 0);
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if (rect) {
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let scroll = ContentScroll.getScrollOffset(element.ownerDocument.defaultView);
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return new Rect(scroll.x + rect.left, scroll.y + rect.top, rect.width, rect.height);
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}
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}
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return new Rect(0, 0, 0, 0);
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},
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/** Gets a rect bounding important parts of the element that must be seen when assisting. */
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_getRect: function _formHelperGetRect() {
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const kDistanceMax = 100;
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let element = this.currentElement;
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let elRect = getBoundingContentRect(element);
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let labels = this._getLabels();
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for (let i=0; i<labels.length; i++) {
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let labelRect = labels[i].rect;
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if (labelRect.left < elRect.left) {
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let isClose = Math.abs(labelRect.left - elRect.left) - labelRect.width < kDistanceMax &&
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Math.abs(labelRect.top - elRect.top) - labelRect.height < kDistanceMax;
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if (isClose) {
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let width = labelRect.width + elRect.width + (elRect.left - labelRect.left - labelRect.width);
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return new Rect(labelRect.left, labelRect.top, width, elRect.height).expandToIntegers();
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}
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}
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}
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return elRect;
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},
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_getLabels: function formHelperGetLabels() {
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let associatedLabels = [];
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if (!this.currentElement)
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return associatedLabels;
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let element = this.currentElement;
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let labels = element.ownerDocument.getElementsByTagName("label");
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for (let i=0; i<labels.length; i++) {
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let label = labels[i];
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if ((label.control == element || label.getAttribute("for") == element.id) && this._isVisibleElement(label)) {
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associatedLabels.push({
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rect: getBoundingContentRect(label),
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title: label.textContent
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});
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}
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}
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return associatedLabels;
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},
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_getJSON: function() {
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let element = this.currentElement;
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let choices = getListForElement(element);
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let editable = (element instanceof HTMLInputElement && element.mozIsTextField(false)) || this._isEditable(element);
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let labels = this._getLabels();
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return {
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current: {
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id: element.id,
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name: element.name,
|
|
title: labels.length ? labels[0].title : "",
|
|
value: element.value,
|
|
maxLength: element.maxLength,
|
|
type: (element.getAttribute("type") || "").toLowerCase(),
|
|
choices: choices,
|
|
isAutocomplete: this._isAutocomplete(element),
|
|
list: this._getListSuggestions(element),
|
|
rect: this._getRect(),
|
|
caretRect: this._getCaretRect(),
|
|
editable: editable
|
|
},
|
|
};
|
|
},
|
|
|
|
/**
|
|
* For each radio button group, remove all but the checked button
|
|
* if there is one, or the first button otherwise.
|
|
*/
|
|
_filterRadioButtons: function(aNodes) {
|
|
// First pass: Find the checked or first element in each group.
|
|
let chosenRadios = {};
|
|
for (let i=0; i < aNodes.length; i++) {
|
|
let node = aNodes[i];
|
|
if (node.type == "radio" && (!chosenRadios.hasOwnProperty(node.name) || node.checked))
|
|
chosenRadios[node.name] = node;
|
|
}
|
|
|
|
// Second pass: Exclude all other radio buttons from the list.
|
|
let result = [];
|
|
for (let i=0; i < aNodes.length; i++) {
|
|
let node = aNodes[i];
|
|
if (node.type == "radio" && chosenRadios[node.name] != node)
|
|
continue;
|
|
result.push(node);
|
|
}
|
|
return result;
|
|
}
|
|
};
|
|
|
|
|
|
/******************************************************************************
|
|
* The next classes wraps some forms elements such as different type of list to
|
|
* abstract the difference between html and xul element while manipulating them
|
|
* - SelectWrapper : <html:select>
|
|
* - MenulistWrapper : <xul:menulist>
|
|
*****************************************************************************/
|
|
|
|
function getWrapperForElement(aElement) {
|
|
let wrapper = null;
|
|
if (aElement instanceof HTMLSelectElement) {
|
|
wrapper = new SelectWrapper(aElement);
|
|
}
|
|
else if (aElement instanceof XULMenuListElement) {
|
|
wrapper = new MenulistWrapper(aElement);
|
|
}
|
|
|
|
return wrapper;
|
|
}
|
|
|
|
function getListForElement(aElement) {
|
|
let wrapper = getWrapperForElement(aElement);
|
|
if (!wrapper)
|
|
return null;
|
|
|
|
let optionIndex = 0;
|
|
let result = {
|
|
multiple: wrapper.getMultiple(),
|
|
choices: []
|
|
};
|
|
|
|
// Build up a flat JSON array of the choices. In HTML, it's possible for select element choices
|
|
// to be under a group header (but not recursively). We distinguish between headers and entries
|
|
// using the boolean "list.group".
|
|
// XXX If possible, this would be a great candidate for tracing.
|
|
let children = wrapper.getChildren();
|
|
for (let i = 0; i < children.length; i++) {
|
|
let child = children[i];
|
|
if (wrapper.isGroup(child)) {
|
|
// This is the group element. Add an entry in the choices that says that the following
|
|
// elements are a member of this group.
|
|
result.choices.push({ group: true,
|
|
text: child.label || child.firstChild.data,
|
|
disabled: child.disabled
|
|
});
|
|
let subchildren = child.children;
|
|
for (let j = 0; j < subchildren.length; j++) {
|
|
let subchild = subchildren[j];
|
|
result.choices.push({
|
|
group: false,
|
|
inGroup: true,
|
|
text: wrapper.getText(subchild),
|
|
disabled: child.disabled || subchild.disabled,
|
|
selected: subchild.selected,
|
|
optionIndex: optionIndex++
|
|
});
|
|
}
|
|
}
|
|
else if (wrapper.isOption(child)) {
|
|
// This is a regular choice under no group.
|
|
result.choices.push({
|
|
group: false,
|
|
inGroup: false,
|
|
text: wrapper.getText(child),
|
|
disabled: child.disabled,
|
|
selected: child.selected,
|
|
optionIndex: optionIndex++
|
|
});
|
|
}
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
|
|
function SelectWrapper(aControl) {
|
|
this._control = aControl;
|
|
}
|
|
|
|
SelectWrapper.prototype = {
|
|
getSelectedIndex: function() {
|
|
return this._control.selectedIndex;
|
|
},
|
|
|
|
getMultiple: function() {
|
|
return this._control.multiple;
|
|
},
|
|
|
|
getOptions: function() {
|
|
return this._control.options;
|
|
},
|
|
|
|
getChildren: function() {
|
|
return this._control.children;
|
|
},
|
|
|
|
getText: function(aChild) {
|
|
return aChild.text;
|
|
},
|
|
|
|
isOption: function(aChild) {
|
|
return aChild instanceof HTMLOptionElement;
|
|
},
|
|
|
|
isGroup: function(aChild) {
|
|
return aChild instanceof HTMLOptGroupElement;
|
|
},
|
|
|
|
select: function(aIndex, aSelected) {
|
|
let options = this._control.options;
|
|
if (this.getMultiple())
|
|
options[aIndex].selected = aSelected;
|
|
else
|
|
options.selectedIndex = aIndex;
|
|
},
|
|
|
|
fireOnChange: function() {
|
|
let control = this._control;
|
|
let evt = this._control.ownerDocument.createEvent("Events");
|
|
evt.initEvent("change", true, true, this._control.ownerDocument.defaultView, 0,
|
|
false, false,
|
|
false, false, null);
|
|
content.setTimeout(function() {
|
|
control.dispatchEvent(evt);
|
|
}, 0);
|
|
}
|
|
};
|
|
|
|
|
|
// bug 559792
|
|
// Use wrappedJSObject when control is in content for extra protection
|
|
function MenulistWrapper(aControl) {
|
|
this._control = aControl;
|
|
}
|
|
|
|
MenulistWrapper.prototype = {
|
|
getSelectedIndex: function() {
|
|
let control = this._control.wrappedJSObject || this._control;
|
|
let result = control.selectedIndex;
|
|
return ((typeof result == "number" && !isNaN(result)) ? result : -1);
|
|
},
|
|
|
|
getMultiple: function() {
|
|
return false;
|
|
},
|
|
|
|
getOptions: function() {
|
|
let control = this._control.wrappedJSObject || this._control;
|
|
return control.menupopup.children;
|
|
},
|
|
|
|
getChildren: function() {
|
|
let control = this._control.wrappedJSObject || this._control;
|
|
return control.menupopup.children;
|
|
},
|
|
|
|
getText: function(aChild) {
|
|
return aChild.label;
|
|
},
|
|
|
|
isOption: function(aChild) {
|
|
return aChild instanceof Ci.nsIDOMXULSelectControlItemElement;
|
|
},
|
|
|
|
isGroup: function(aChild) {
|
|
return false;
|
|
},
|
|
|
|
select: function(aIndex, aSelected) {
|
|
let control = this._control.wrappedJSObject || this._control;
|
|
control.selectedIndex = aIndex;
|
|
},
|
|
|
|
fireOnChange: function() {
|
|
let control = this._control;
|
|
let evt = document.createEvent("XULCommandEvent");
|
|
evt.initCommandEvent("command", true, true, window, 0,
|
|
false, false,
|
|
false, false, null);
|
|
content.setTimeout(function() {
|
|
control.dispatchEvent(evt);
|
|
}, 0);
|
|
}
|
|
};
|