diff -r 6eab20a4249f -r 73c0973e8e0a ko/bck2brwsr/src/main/java/org/apidesign/html/ko2brwsr/Knockout.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ko/bck2brwsr/src/main/java/org/apidesign/html/ko2brwsr/Knockout.java Mon Jun 24 17:50:44 2013 +0200 @@ -0,0 +1,134 @@ +/** + * HTML via Java(tm) Language Bindings + * Copyright (C) 2013 Jaroslav Tulach + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. apidesign.org + * designates this particular file as subject to the + * "Classpath" exception as provided by apidesign.org + * in the License file that accompanied this code. + * + * You should have received a copy of the GNU General Public License + * along with this program. Look for COPYING file in the top folder. + * If not, see http://wiki.apidesign.org/wiki/GPLwithClassPathException + */ +package org.apidesign.html.ko2brwsr; + +import java.lang.reflect.Method; +import java.util.List; +import org.apidesign.bck2brwsr.core.ExtraJavaScript; +import org.apidesign.bck2brwsr.core.JavaScriptBody; + +/** Provides binding between models and bck2brwsr VM. + * + * @author Jaroslav Tulach + */ +@ExtraJavaScript(resource = "/org/apidesign/bck2brwsr/htmlpage/knockout-2.2.1.js") +final class Knockout { + /** used by tests */ + static Knockout next; + private final Object model; + + Knockout(Object model) { + this.model = model == null ? this : model; + } + + public static Knockout applyBindings( + Object model, String[] propsGettersAndSetters, + String[] methodsAndSignatures + ) { + applyImpl(propsGettersAndSetters, model.getClass(), model, model, methodsAndSignatures); + return new Knockout(model); + } + public static Knockout applyBindings( + Class modelClass, M model, String[] propsGettersAndSetters, + String[] methodsAndSignatures + ) { + Knockout bindings = next; + next = null; + if (bindings == null) { + bindings = new Knockout(null); + } + applyImpl(propsGettersAndSetters, modelClass, bindings, model, methodsAndSignatures); + applyBindings(bindings); + return bindings; + } + + public void valueHasMutated(String prop) { + valueHasMutated(model, prop); + } + @JavaScriptBody(args = { "self", "prop" }, body = + "var p = self[prop]; if (p) p.valueHasMutated();" + ) + public static void valueHasMutated(Object self, String prop) { + } + + + @JavaScriptBody(args = { "id", "ev" }, body = "ko.utils.triggerEvent(window.document.getElementById(id), ev.substring(2));") + public static void triggerEvent(String id, String ev) { + } + + @JavaScriptBody(args = { "bindings", "model", "prop", "getter", "setter", "primitive", "array" }, body = + "var bnd = {\n" + + " 'read': function() {\n" + + " var v = model[getter]();\n" + + " if (array) v = v.koArray(); else if (v !== null) v = v.valueOf();\n" + + " return v;\n" + + " },\n" + + " 'owner': bindings\n" + + "};\n" + + "if (setter != null) {\n" + + " bnd['write'] = function(val) {\n" + + " var v = val === null ? null : val.valueOf();" + + " model[setter](v);\n" + + " };\n" + + "}\n" + + "bindings[prop] = ko['computed'](bnd);" + ) + static void bind( + Object bindings, Object model, String prop, String getter, String setter, boolean primitive, boolean array + ) { + } + + @JavaScriptBody(args = { "bindings", "model", "prop", "sig" }, body = + "bindings[prop] = function(data, ev) { model[sig](data, ev); };" + ) + static void expose( + Object bindings, Object model, String prop, String sig + ) { + } + + @JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);") + static void applyBindings(Object bindings) {} + + private static void applyImpl( + String[] propsGettersAndSetters, + Class modelClass, + Object bindings, + Object model, + String[] methodsAndSignatures + ) throws IllegalStateException, SecurityException { + for (int i = 0; i < propsGettersAndSetters.length; i += 4) { + try { + Method getter = modelClass.getMethod(propsGettersAndSetters[i + 3]); + bind(bindings, model, propsGettersAndSetters[i], + propsGettersAndSetters[i + 1], + propsGettersAndSetters[i + 2], + getter.getReturnType().isPrimitive(), + List.class.isAssignableFrom(getter.getReturnType())); + } catch (NoSuchMethodException ex) { + throw new IllegalStateException(ex.getMessage()); + } + } + for (int i = 0; i < methodsAndSignatures.length; i += 2) { + expose( + bindings, model, methodsAndSignatures[i], methodsAndSignatures[i + 1]); + } + } +}