gecko-dev/toolkit/modules/SelectParentHelper.jsm

95 строки
2.5 KiB
JavaScript
Исходник Обычный вид История

/* 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/. */
"use strict";
this.EXPORTED_SYMBOLS = [
"SelectParentHelper"
];
let currentBrowser = null;
this.SelectParentHelper = {
populate: function(popup, items, selectedIndex) {
// Clear the current contents of the popup
popup.textContent = "";
populateChildren(popup, items, selectedIndex);
},
open: function(browser, popup, rect) {
currentBrowser = browser;
this._registerListeners(popup);
popup.hidden = false;
let {x, y} = browser.mapScreenCoordinatesFromContent(rect.left, rect.top + rect.height);
popup.openPopupAtScreen(x, y);
},
hide: function(popup) {
popup.hidePopup();
},
handleEvent: function(event) {
let popup = event.currentTarget;
switch (event.type) {
case "command":
if (event.target.hasAttribute("value")) {
currentBrowser.messageManager.sendAsyncMessage("Forms:SelectDropDownItem", {
value: event.target.value
});
}
popup.hidePopup();
break;
case "popuphidden":
currentBrowser.messageManager.sendAsyncMessage("Forms:DismissedDropDown", {});
currentBrowser = null;
this._unregisterListeners(popup);
break;
}
},
_registerListeners: function(popup) {
popup.addEventListener("command", this);
popup.addEventListener("popuphidden", this);
},
_unregisterListeners: function(popup) {
popup.removeEventListener("command", this);
popup.removeEventListener("popuphidden", this);
},
};
function populateChildren(element, options, selectedIndex, startIndex = 0, isGroup = false) {
let index = startIndex;
for (let option of options) {
let item = element.ownerDocument.createElement("menuitem");
item.setAttribute("label", option.textContent);
item.setAttribute("type", "radio");
if (index == selectedIndex) {
item.setAttribute("checked", "true");
}
element.appendChild(item);
if (option.children.length > 0) {
item.classList.add("contentSelectDropdown-optgroup");
item.setAttribute("disabled", "true");
index = populateChildren(element, option.children, selectedIndex, index, true);
} else {
item.setAttribute("value", index++);
if (isGroup) {
item.classList.add("contentSelectDropdown-ingroup")
}
}
}
return index;
}