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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
var ListMenu = {
get element() {
delete this.element;
return this.element = document.getElementById('listmenu');
},
get container() {
delete this.container;
return this.container = document.querySelector('#listmenu menu');
},
get visible() {
return this.element.classList.contains('visible');
},
// Listen to click event only
init: function lm_init() {
window.addEventListener('click', this, true);
window.addEventListener('screenchange', this, true);
window.addEventListener('home', this);
window.addEventListener('holdhome', this);
},
// Pass an array of list items and handler for clicking on the items
// Modified to fit contextmenu use case, loop into the menu items
request: function lm_request(listItems, title, successCb, errorCb) {
this.container.innerHTML = '';
this.currentLevel = 0;
this.internalList = [];
this.setTitle(title);
this.buildMenu(listItems);
this.internalList.forEach(function render_item(item) {
this.container.appendChild(item);
}, this);
this.onreturn = successCb || function() {};
this.oncancel = errorCb || function() {};
this.show();
},
buildMenu: function lm_buildMenu(items) {
var containerDiv = document.createElement('ul');
var _ = navigator.mozL10n.get;
if (this.currentLevel === 0) {
containerDiv.classList.add('list-menu-root');
containerDiv.id = 'list-menu-root';
} else {
containerDiv.id = 'list-menu-' + this.internalList.length;
}
this.internalList.push(containerDiv);
items.forEach(function traveseItems(item) {
var item_div = document.createElement('li');
var button = document.createElement('a');
button.setAttribute('role', 'button');
if (item.type && item.type == 'menu') {
// XXX: We disallow multi-level menu at this moment
// See https://bugzilla.mozilla.org/show_bug.cgi?id=824928
// for UX design and dev implementation tracking
return;
} else if (item.type && item.type == 'menuitem') {
button.dataset.value = item.id;
button.textContent = item.label;
} else {
button.dataset.value = item.value;
button.textContent = item.label;
}
item_div.appendChild(button);
if (item.icon) {
button.style.backgroundImage = 'url(' + item.icon + ')';
button.classList.add('icon');
}
containerDiv.appendChild(item_div);
}, this);
if (this.currentLevel > 0) {
var back = document.createElement('li');
var button = document.createElement('a');
button.setAttribute('role', 'button');
button.textContent = _('back');
button.href = '#' + this.currentParent;
back.classList.add('back');
back.appendChild(button);
containerDiv.appendChild(back);
} else {
var cancel = document.createElement('li');
var button = document.createElement('button');
button.textContent = _('cancel');
button.dataset.action = 'cancel';
cancel.appendChild(button);
containerDiv.appendChild(cancel);
}
containerDiv.dataset.level = this.currentLevel;
this.currentChild = containerDiv.id;
},
setTitle: function lm_setTitle(title) {
if (!title)
return;
var titleElement = document.createElement('h3');
titleElement.textContent = title;
this.container.appendChild(titleElement);
},
show: function lm_show() {
if (this.visible)
return;
this.container.classList.remove('slidedown');
this.element.classList.add('visible');
},
hide: function lm_hide() {
if (!this.visible)
return;
var self = this;
var container = this.container;
container.addEventListener('transitionend', function list_hide() {
container.removeEventListener('transitionend', list_hide);
self.element.classList.remove('visible');
});
setTimeout(function() {
container.classList.add('slidedown');
});
},
handleEvent: function lm_handleEvent(evt) {
switch (evt.type) {
case 'screenchange':
if (!evt.detail.screenEnabled) {
this.hide();
this.oncancel();
}
break;
case 'click':
if (!this.visible)
return;
var cancel = evt.target.dataset.action;
if (cancel && cancel == 'cancel') {
this.hide();
this.oncancel();
return;
}
var value = evt.target.dataset.value;
if (!value) {
return;
}
this.hide();
this.onreturn(value);
break;
case 'home':
case 'holdhome':
if (!this.visible)
return;
this.hide();
this.oncancel();
break;
}
}
};
ListMenu.init();
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