/*
 * The MIT License
 *
 * Copyright 2015 eduardo.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

define(['knockout', 'jquery'], function(ko, $) {
    'use strict';

    ko.bindingHandlers.textcontent = {
        init: function(element, valueAccessor, allBindingsAccessor) {
            $(element).prop('contenteditable', true);

            ko.utils.registerEventHandler(element, "keydown", function() {
                var modelValue = valueAccessor();
                var elementValue = $(element).text();
                if (ko.isWriteableObservable(modelValue)) {
                    modelValue(elementValue);
                }
                else { //handle non-observable one-way binding
                    var allBindings = allBindingsAccessor();
                    if (allBindings['_ko_property_writers'] && allBindings['_ko_property_writers'].textcontent) {
                        allBindings['_ko_property_writers'].textcontent(elementValue);
                    }
                }
            });
        },
        update: function(element, valueAccessor) {
            var value = ko.utils.unwrapObservable(valueAccessor()) || "";
            if ($(element).text() !== value) {
                $(element).text(value);
            }
        }
    };

});
