2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.htmlpage;
20 import java.lang.reflect.Method;
21 import org.apidesign.bck2brwsr.core.ExtraJavaScript;
22 import org.apidesign.bck2brwsr.core.JavaScriptBody;
23 import org.apidesign.bck2brwsr.htmlpage.api.Element;
25 /** Provides binding between models and
27 * @author Jaroslav Tulach <jtulach@netbeans.org>
29 @ExtraJavaScript(resource = "/org/apidesign/bck2brwsr/htmlpage/knockout-2.2.1.js")
30 public class Knockout {
37 public static <M> Knockout applyBindings(
38 Class<M> modelClass, M model, String[] propsGettersAndSetters
40 Knockout bindings = next;
42 if (bindings == null) {
43 bindings = new Knockout();
45 for (int i = 0; i < propsGettersAndSetters.length; i += 4) {
47 Method getter = modelClass.getMethod(propsGettersAndSetters[i + 3]);
48 bind(bindings, model, propsGettersAndSetters[i],
49 propsGettersAndSetters[i + 1],
50 propsGettersAndSetters[i + 2],
51 getter.getReturnType().isPrimitive()
53 } catch (NoSuchMethodException ex) {
54 Element.alert("Error: " + ex.getMessage());
57 applyBindings(bindings);
61 @JavaScriptBody(args = { "prop" }, body =
62 "this[prop].valueHasMutated();"
64 public void valueHasMutated(String prop) {
68 @JavaScriptBody(args = { "id", "ev" }, body = "ko.utils.triggerEvent(window.document.getElementById(id), ev.substring(2));")
69 public static void triggerEvent(String id, String ev) {
72 @JavaScriptBody(args = { "bindings", "model", "prop", "getter", "setter", "primitive" }, body =
74 + " read: function() {\n"
75 + " var v = model[getter]();\n"
78 + " owner: bindings\n"
80 + "if (setter != null) {\n"
81 + " bnd.write = function(val) {\n"
82 + " model[setter](primitive ? new Number(val) : val);\n"
85 + "bindings[prop] = ko.computed(bnd);"
87 private static void bind(
88 Object bindings, Object model, String prop, String getter, String setter, boolean primitive
92 @JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);")
93 private static void applyBindings(Object bindings) {}