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/**
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* Back 2 Browser Bytecode Translator
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. Look for COPYING file in the top folder.
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* If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.bck2brwsr.htmlpage;
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import java.lang.reflect.Method;
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import java.util.List;
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import org.apidesign.bck2brwsr.core.ExtraJavaScript;
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import org.apidesign.bck2brwsr.core.JavaScriptBody;
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/** Provides binding between models and
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*
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* @author Jaroslav Tulach <jtulach@netbeans.org>
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*/
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@ExtraJavaScript(resource = "/org/apidesign/bck2brwsr/htmlpage/knockout-2.2.1.js")
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public class Knockout {
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/** used by tests */
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static Knockout next;
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private final Object model;
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Knockout(Object model) {
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this.model = model == null ? this : model;
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}
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public static <M> Knockout applyBindings(
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Object model, String[] propsGettersAndSetters,
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String[] methodsAndSignatures
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) {
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applyImpl(propsGettersAndSetters, model.getClass(), model, model, methodsAndSignatures);
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return new Knockout(model);
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}
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public static <M> Knockout applyBindings(
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Class<M> modelClass, M model, String[] propsGettersAndSetters,
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String[] methodsAndSignatures
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) {
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Knockout bindings = next;
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next = null;
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if (bindings == null) {
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bindings = new Knockout(null);
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}
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applyImpl(propsGettersAndSetters, modelClass, bindings, model, methodsAndSignatures);
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applyBindings(bindings);
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return bindings;
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}
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public void valueHasMutated(String prop) {
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valueHasMutated(model, prop);
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}
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@JavaScriptBody(args = { "self", "prop" }, body =
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"var p = self[prop]; if (p) p.valueHasMutated();"
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)
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public static void valueHasMutated(Object self, String prop) {
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}
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@JavaScriptBody(args = { "id", "ev" }, body = "ko.utils.triggerEvent(window.document.getElementById(id), ev.substring(2));")
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public static void triggerEvent(String id, String ev) {
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}
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@JavaScriptBody(args = { "bindings", "model", "prop", "getter", "setter", "primitive", "array" }, body =
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"var bnd = {\n"
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+ " 'read': function() {\n"
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+ " var v = model[getter]();\n"
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+ " if (array) v = v.koArray();\n"
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+ " return v;\n"
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+ " },\n"
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+ " 'owner': bindings\n"
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+ "};\n"
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+ "if (setter != null) {\n"
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+ " bnd['write'] = function(val) {\n"
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+ " model[setter](primitive ? new Number(val) : val);\n"
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+ " };\n"
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+ "}\n"
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+ "bindings[prop] = ko['computed'](bnd);"
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)
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static void bind(
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Object bindings, Object model, String prop, String getter, String setter, boolean primitive, boolean array
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) {
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}
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@JavaScriptBody(args = { "bindings", "model", "prop", "sig" }, body =
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"bindings[prop] = function(data, ev) { model[sig](data, ev); };"
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)
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static void expose(
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Object bindings, Object model, String prop, String sig
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) {
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}
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@JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);")
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static void applyBindings(Object bindings) {}
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private static void applyImpl(
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String[] propsGettersAndSetters,
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Class<?> modelClass,
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Object bindings,
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Object model,
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String[] methodsAndSignatures
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) throws IllegalStateException, SecurityException {
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for (int i = 0; i < propsGettersAndSetters.length; i += 4) {
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try {
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Method getter = modelClass.getMethod(propsGettersAndSetters[i + 3]);
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bind(bindings, model, propsGettersAndSetters[i],
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propsGettersAndSetters[i + 1],
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propsGettersAndSetters[i + 2],
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getter.getReturnType().isPrimitive(),
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List.class.isAssignableFrom(getter.getReturnType()));
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} catch (NoSuchMethodException ex) {
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throw new IllegalStateException(ex.getMessage());
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}
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}
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for (int i = 0; i < methodsAndSignatures.length; i += 2) {
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expose(
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bindings, model, methodsAndSignatures[i], methodsAndSignatures[i + 1]);
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}
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}
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}
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