2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012-2015 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 java.util.List;
22 import org.apidesign.bck2brwsr.core.ExtraJavaScript;
23 import org.apidesign.bck2brwsr.core.JavaScriptBody;
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 {
33 private final Object model;
35 Knockout(Object model) {
36 this.model = model == null ? this : model;
39 public static <M> Knockout applyBindings(
40 Object model, String[] propsGettersAndSetters,
41 String[] methodsAndSignatures
43 applyImpl(propsGettersAndSetters, model.getClass(), model, model, methodsAndSignatures);
44 return new Knockout(model);
46 public static <M> Knockout applyBindings(
47 Class<M> modelClass, M model, String[] propsGettersAndSetters,
48 String[] methodsAndSignatures
50 Knockout bindings = next;
52 if (bindings == null) {
53 bindings = new Knockout(null);
55 applyImpl(propsGettersAndSetters, modelClass, bindings, model, methodsAndSignatures);
56 applyBindings(bindings);
60 public void valueHasMutated(String prop) {
61 valueHasMutated(model, prop);
63 @JavaScriptBody(args = { "self", "prop" }, body =
64 "self[prop].valueHasMutated();"
66 public void valueHasMutated(Object self, String prop) {
70 @JavaScriptBody(args = { "id", "ev" }, body = "ko.utils.triggerEvent(window.document.getElementById(id), ev.substring(2));")
71 public static void triggerEvent(String id, String ev) {
74 @JavaScriptBody(args = { "bindings", "model", "prop", "getter", "setter", "primitive", "array" }, body =
76 + " 'read': function() {\n"
77 + " var v = model[getter]();\n"
78 + " if (array) v = v.koArray();\n"
81 + " 'owner': bindings\n"
83 + "if (setter != null) {\n"
84 + " bnd['write'] = function(val) {\n"
85 + " model[setter](primitive ? new Number(val) : val);\n"
88 + "bindings[prop] = ko['computed'](bnd);"
90 private static void bind(
91 Object bindings, Object model, String prop, String getter, String setter, boolean primitive, boolean array
95 @JavaScriptBody(args = { "bindings", "model", "prop", "sig" }, body =
96 "bindings[prop] = function(data, ev) { model[sig](data, ev); };"
98 private static void expose(
99 Object bindings, Object model, String prop, String sig
103 @JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);")
104 private static void applyBindings(Object bindings) {}
106 private static void applyImpl(
107 String[] propsGettersAndSetters,
111 String[] methodsAndSignatures
112 ) throws IllegalStateException, SecurityException {
113 for (int i = 0; i < propsGettersAndSetters.length; i += 4) {
115 Method getter = modelClass.getMethod(propsGettersAndSetters[i + 3]);
116 bind(bindings, model, propsGettersAndSetters[i],
117 propsGettersAndSetters[i + 1],
118 propsGettersAndSetters[i + 2],
119 getter.getReturnType().isPrimitive(),
120 List.class.isAssignableFrom(getter.getReturnType()));
121 } catch (NoSuchMethodException ex) {
122 throw new IllegalStateException(ex.getMessage());
125 for (int i = 0; i < methodsAndSignatures.length; i += 2) {
127 bindings, model, methodsAndSignatures[i], methodsAndSignatures[i + 1]);