1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ko/bck2brwsr/src/main/java/org/apidesign/bck2brwsr/ko2brwsr/Knockout.java Tue Feb 11 10:48:24 2014 +0100
1.3 @@ -0,0 +1,131 @@
1.4 +/**
1.5 + * Back 2 Browser Bytecode Translator
1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, version 2 of the License.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License
1.18 + * along with this program. Look for COPYING file in the top folder.
1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
1.20 + */
1.21 +package org.apidesign.bck2brwsr.ko2brwsr;
1.22 +
1.23 +import java.lang.reflect.Method;
1.24 +import java.util.List;
1.25 +import org.apidesign.bck2brwsr.core.ExtraJavaScript;
1.26 +import org.apidesign.bck2brwsr.core.JavaScriptBody;
1.27 +
1.28 +/** Provides binding between models and bck2brwsr VM.
1.29 + *
1.30 + * @author Jaroslav Tulach <jtulach@netbeans.org>
1.31 + */
1.32 +@ExtraJavaScript(resource = "/org/apidesign/bck2brwsr/htmlpage/knockout-2.2.1.js")
1.33 +final class Knockout {
1.34 + /** used by tests */
1.35 + static Knockout next;
1.36 + private final Object model;
1.37 +
1.38 + Knockout(Object model) {
1.39 + this.model = model == null ? this : model;
1.40 + }
1.41 +
1.42 + public static <M> Knockout applyBindings(
1.43 + Object model, String[] propsGettersAndSetters,
1.44 + String[] methodsAndSignatures
1.45 + ) {
1.46 + applyImpl(propsGettersAndSetters, model.getClass(), model, model, methodsAndSignatures);
1.47 + return new Knockout(model);
1.48 + }
1.49 + public static <M> Knockout applyBindings(
1.50 + Class<M> modelClass, M model, String[] propsGettersAndSetters,
1.51 + String[] methodsAndSignatures
1.52 + ) {
1.53 + Knockout bindings = next;
1.54 + next = null;
1.55 + if (bindings == null) {
1.56 + bindings = new Knockout(null);
1.57 + }
1.58 + applyImpl(propsGettersAndSetters, modelClass, bindings, model, methodsAndSignatures);
1.59 + applyBindings(bindings);
1.60 + return bindings;
1.61 + }
1.62 +
1.63 + public void valueHasMutated(String prop) {
1.64 + valueHasMutated(model, prop);
1.65 + }
1.66 + @JavaScriptBody(args = { "self", "prop" }, body =
1.67 + "var p = self[prop]; if (p) p.valueHasMutated();"
1.68 + )
1.69 + public static void valueHasMutated(Object self, String prop) {
1.70 + }
1.71 +
1.72 +
1.73 + @JavaScriptBody(args = { "id", "ev" }, body = "ko.utils.triggerEvent(window.document.getElementById(id), ev.substring(2));")
1.74 + public static void triggerEvent(String id, String ev) {
1.75 + }
1.76 +
1.77 + @JavaScriptBody(args = { "bindings", "model", "prop", "getter", "setter", "primitive", "array" }, body =
1.78 + "var bnd = {\n"
1.79 + + " 'read': function() {\n"
1.80 + + " var v = model[getter]();\n"
1.81 + + " if (array) v = v.koArray(); else if (v !== null) v = v.valueOf();\n"
1.82 + + " return v;\n"
1.83 + + " },\n"
1.84 + + " 'owner': bindings\n"
1.85 + + "};\n"
1.86 + + "if (setter != null) {\n"
1.87 + + " bnd['write'] = function(val) {\n"
1.88 + + " var v = val === null ? null : val.valueOf();"
1.89 + + " model[setter](v);\n"
1.90 + + " };\n"
1.91 + + "}\n"
1.92 + + "bindings[prop] = ko['computed'](bnd);"
1.93 + )
1.94 + static void bind(
1.95 + Object bindings, Object model, String prop, String getter, String setter, boolean primitive, boolean array
1.96 + ) {
1.97 + }
1.98 +
1.99 + @JavaScriptBody(args = { "bindings", "model", "prop", "sig" }, body =
1.100 + "bindings[prop] = function(data, ev) { model[sig](data, ev); };"
1.101 + )
1.102 + static void expose(
1.103 + Object bindings, Object model, String prop, String sig
1.104 + ) {
1.105 + }
1.106 +
1.107 + @JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);")
1.108 + static void applyBindings(Object bindings) {}
1.109 +
1.110 + private static void applyImpl(
1.111 + String[] propsGettersAndSetters,
1.112 + Class<?> modelClass,
1.113 + Object bindings,
1.114 + Object model,
1.115 + String[] methodsAndSignatures
1.116 + ) throws IllegalStateException, SecurityException {
1.117 + for (int i = 0; i < propsGettersAndSetters.length; i += 4) {
1.118 + try {
1.119 + Method getter = modelClass.getMethod(propsGettersAndSetters[i + 3]);
1.120 + bind(bindings, model, propsGettersAndSetters[i],
1.121 + propsGettersAndSetters[i + 1],
1.122 + propsGettersAndSetters[i + 2],
1.123 + getter.getReturnType().isPrimitive(),
1.124 + List.class.isAssignableFrom(getter.getReturnType()));
1.125 + } catch (NoSuchMethodException ex) {
1.126 + throw new IllegalStateException(ex.getMessage());
1.127 + }
1.128 + }
1.129 + for (int i = 0; i < methodsAndSignatures.length; i += 2) {
1.130 + expose(
1.131 + bindings, model, methodsAndSignatures[i], methodsAndSignatures[i + 1]);
1.132 + }
1.133 + }
1.134 +}