# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1358702418 -3600
# Node ID 854286e49061b5e29ffb29c95115b87b8894b420
# Parent  14268cd404a4db1faaea97780fab09bb17ff5c1d
Basic support for knockout.js. It can read and write model properties.

diff -r 14268cd404a4 -r 854286e49061 javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/Knockout.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/Knockout.java	Sun Jan 20 18:20:18 2013 +0100
@@ -0,0 +1,69 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * 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.
+ *
+ * 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://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.bck2brwsr.htmlpage;
+
+import org.apidesign.bck2brwsr.core.ExtraJavaScript;
+import org.apidesign.bck2brwsr.core.JavaScriptBody;
+
+/** Provides binding between models and 
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+@ExtraJavaScript(resource = "org/apidesign/bck2brwsr/htmlpage/knockout-min-2.2.0.js")
+public final class Knockout {
+
+
+    private Knockout() {
+    }
+    
+    public static <M> void applyBindings(
+        Class<M> modelClass, M model, String[] propsGettersAndSetters
+    ) {
+        Object bindings = new Object();
+        for (int i = 0; i < propsGettersAndSetters.length; i += 3) {
+            bind(bindings, model, propsGettersAndSetters[i],
+                propsGettersAndSetters[i + 1],
+                propsGettersAndSetters[i + 2]
+            );
+        }
+        applyBindings(bindings);
+    }
+    
+    @JavaScriptBody(args = { "bindings", "model", "prop", "getter", "setter" }, body =
+          "var bnd = {\n"
+        + "  read: function() {\n"
+        + "    var v = model[getter]();\n"
+        + "    return v;\n"
+        + "  },\n"
+        + "  owner: bindings\n"
+        + "};\n"
+        + "if (setter != null) {\n"
+        + "  bnd.write = function(val) {\n"
+        + "    model[setter](new Number(val));\n"
+        + "  };\n"
+        + "}\n"
+        + "bindings[prop] = ko.computed(bnd);"
+    )
+    private static void bind(
+        Object bindings, Object model, String prop, String getter, String setter
+    ) {
+    }
+    
+    @JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);")
+    private static void applyBindings(Object bindings) {}
+}
diff -r 14268cd404a4 -r 854286e49061 javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/PageProcessor.java
--- a/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/PageProcessor.java	Sun Jan 20 14:29:10 2013 +0100
+++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/PageProcessor.java	Sun Jan 20 18:20:18 2013 +0100
@@ -92,6 +92,7 @@
                     w.append("package " + pkg + ";\n");
                     w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
                     w.append("class ").append(className).append(" {\n");
+                    w.append("  private ").append(className).append("() {}\n");
                     for (String id : pp.ids()) {
                         String tag = pp.tagNameForId(id);
                         String type = type(tag);
@@ -104,8 +105,27 @@
                         return false;
                     }
                     w.append("  }\n");
-                    generateProperties(w, p.properties());
-                    generateComputedProperties(w, e.getEnclosedElements());
+                    List<String> propsGetSet = new ArrayList<String>();
+                    generateProperties(w, p.properties(), propsGetSet);
+                    generateComputedProperties(w, e.getEnclosedElements(), propsGetSet);
+                    if (!propsGetSet.isEmpty()) {
+                        w.write("public static void applyBindings() {\n");
+                        w.write("  org.apidesign.bck2brwsr.htmlpage.Knockout.applyBindings(");
+                        w.write(className + ".class, new " + className + "(), ");
+                        w.write("new String[] {\n");
+                        String sep = "";
+                        for (String n : propsGetSet) {
+                            w.write(sep);
+                            if (n == null) {
+                                w.write("    null");
+                            } else {
+                                w.write("    \"" + n + "\"");
+                            }
+                            sep = ",\n";
+                        }
+                        w.write("\n  });\n}\n");
+                        //w.write("static { applyBindings(); }\n");
+                    }
                     w.append("}\n");
                 } finally {
                     w.close();
@@ -237,11 +257,13 @@
         return e.getEnclosingElement();
     }
 
-    private static void generateProperties(Writer w, Property[] properties) throws IOException {
+    private static void generateProperties(
+        Writer w, Property[] properties, Collection<String> props
+    ) throws IOException {
         for (Property p : properties) {
-            String[] gs = toGetSet(p.name(), null);
+            final String tn = typeName(p);
+            String[] gs = toGetSet(p.name(), tn);
 
-            final String tn = typeName(p);
             w.write("private static " + tn + " prop_" + p.name() + ";\n");
             w.write("public static " + tn + " " + gs[0] + "() {\n");
             w.write("  return prop_" + p.name() + ";\n");
@@ -249,10 +271,16 @@
             w.write("public static void " + gs[1] + "(" + tn + " v) {\n");
             w.write("  prop_" + p.name() + " = v;\n");
             w.write("}\n");
+            
+            props.add(p.name());
+            props.add(gs[2]);
+            props.add(gs[3]);
         }
     }
 
-    private void generateComputedProperties(Writer w, Collection<? extends Element> arr) throws IOException {
+    private void generateComputedProperties(
+        Writer w, Collection<? extends Element> arr, Collection<String> props
+    ) throws IOException {
         for (Element e : arr) {
             if (e.getKind() != ElementKind.METHOD) {
                 continue;
@@ -261,30 +289,47 @@
                 continue;
             }
             ExecutableElement ee = (ExecutableElement)e;
-            String[] gs = toGetSet(ee.getSimpleName().toString(), null);
+            final String tn = ee.getReturnType().toString();
+            String[] gs = toGetSet(ee.getSimpleName().toString(), tn);
 
-            final String tn = ee.getReturnType().toString();
             w.write("public static " + tn + " " + gs[0] + "() {\n");
             w.write("  return " + e.getEnclosingElement().getSimpleName() + '.' + e.getSimpleName() + "(");
             String sep = "";
             for (VariableElement pe : ee.getParameters()) {
-                String[] call = toGetSet(pe.getSimpleName().toString(), null);
+                String[] call = toGetSet(pe.getSimpleName().toString(), pe.asType().toString());
                 w.write(sep);
                 w.write(call[0] + "()");
                 sep = ", ";
             }
             w.write(");\n");
             w.write("}\n");
+            
+            props.add(e.getSimpleName().toString());
+            props.add(gs[2]);
+            props.add(null);
         }
     }
 
-    private static String[] toGetSet(String name, Object type) {
+    private static String[] toGetSet(String name, String type) {
         String n = Character.toUpperCase(name.charAt(0)) + name.substring(1);
-//        if (p.type() == boolean.class) {
-//            return new String[] { "is" + n, "set" + n };
-//        } else {
-        return new String[]{"get" + n, "set" + n};
-//        }
+        String bck2brwsrType = "L" + type.replace('.', '_') + "_2";
+        if ("int".equals(type)) {
+            bck2brwsrType = "I";
+        }
+        if ("double".equals(type)) {
+            bck2brwsrType = "D";
+        }
+        String pref = "get";
+        if ("boolean".equals(type)) {
+            pref = "is";
+            bck2brwsrType = "Z";
+        }
+        return new String[]{
+            pref + n, 
+            "set" + n, 
+            pref + n + "__" + bck2brwsrType,
+            "set" + n + "__V" + bck2brwsrType
+        };
     }
 
     private static String typeName(Property p) {
diff -r 14268cd404a4 -r 854286e49061 javaquery/api/src/main/resources/org/apidesign/bck2brwsr/htmlpage/knockout-min-2.2.0.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaquery/api/src/main/resources/org/apidesign/bck2brwsr/htmlpage/knockout-min-2.2.0.js	Sun Jan 20 18:20:18 2013 +0100
@@ -0,0 +1,85 @@
+// Knockout JavaScript library v2.2.0
+// (c) Steven Sanderson - http://knockoutjs.com/
+// License: MIT (http://www.opensource.org/licenses/mit-license.php)
+
+(function() {function i(v){throw v;}var l=!0,n=null,q=!1;function t(v){return function(){return v}};var w=window,x=document,fa=navigator,E=window.jQuery,H=void 0;
+function K(v){function ga(a,d,c,e,f){var g=[],a=b.j(function(){var a=d(c,f)||[];0<g.length&&(b.a.Xa(L(g),a),e&&b.r.K(e,n,[c,a,f]));g.splice(0,g.length);b.a.P(g,a)},n,{W:a,Ja:function(){return 0==g.length||!b.a.X(g[0])}});return{M:g,j:a.oa()?a:H}}function L(a){for(;a.length&&!b.a.X(a[0]);)a.splice(0,1);if(1<a.length){for(var d=a[0],c=a[a.length-1],e=[d];d!==c;){d=d.nextSibling;if(!d)return;e.push(d)}Array.prototype.splice.apply(a,[0,a.length].concat(e))}return a}function R(a,b,c,e,f){var g=Math.min,
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+var f=b.data("precompiled");f||(f=b.text()||"",f=E.template(n,"{{ko_with $item.koBindingContext}}"+f+"{{/ko_with}}"),b.data("precompiled",f));b=[c.$data];c=E.extend({koBindingContext:c},e.templateOptions);c=E.tmpl(f,b,c);c.appendTo(x.createElement("div"));E.fragments={};return c};this.createJavaScriptEvaluatorBlock=function(a){return"{{ko_code ((function() { return "+a+" })()) }}"};this.addTemplate=function(a,b){x.write("<script type='text/html' id='"+a+"'>"+b+"<\/script>")};0<a&&(E.tmpl.tag.ko_code=
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+})();
diff -r 14268cd404a4 -r 854286e49061 javaquery/api/src/test/java/org/apidesign/bck2brwsr/htmlpage/ProcessPageTest.java
--- a/javaquery/api/src/test/java/org/apidesign/bck2brwsr/htmlpage/ProcessPageTest.java	Sun Jan 20 14:29:10 2013 +0100
+++ b/javaquery/api/src/test/java/org/apidesign/bck2brwsr/htmlpage/ProcessPageTest.java	Sun Jan 20 18:20:18 2013 +0100
@@ -108,7 +108,9 @@
             + "\n"
             + "window.document = doc;\n"
         );
-        Invocable i = compileClass(sb, "org/apidesign/bck2brwsr/htmlpage/PageController");
+        Invocable i = compileClass(sb, 
+            "org/apidesign/bck2brwsr/htmlpage/PageController"
+        );
 
         Object ret = null;
         try {
diff -r 14268cd404a4 -r 854286e49061 javaquery/demo-calculator-dynamic/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java
--- a/javaquery/demo-calculator-dynamic/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java	Sun Jan 20 14:29:10 2013 +0100
+++ b/javaquery/demo-calculator-dynamic/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java	Sun Jan 20 18:20:18 2013 +0100
@@ -20,6 +20,7 @@
 import org.apidesign.bck2brwsr.htmlpage.api.On;
 import static org.apidesign.bck2brwsr.htmlpage.api.OnEvent.*;
 import org.apidesign.bck2brwsr.htmlpage.api.Page;
+import org.apidesign.bck2brwsr.htmlpage.api.Property;
 
 /** HTML5 & Java demo showing the power of 
  * <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
@@ -27,7 +28,9 @@
  * 
  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
  */
-@Page(xhtml="Calculator.xhtml")
+@Page(xhtml="Calculator.xhtml", properties = {
+    @Property(name = "display", type = double.class)
+})
 public class App {
     private static double memory;
     private static String operation;
@@ -36,23 +39,23 @@
     static void clear() {
         memory = 0;
         operation = null;
-        Calculator.DISPLAY.setValue("0");
+        Calculator.setDisplay(0);
     }
     
     @On(event = CLICK, id= { "plus", "minus", "mul", "div" })
     static void applyOp(String op) {
-        memory = getValue();
+        memory = Calculator.getDisplay();
         operation = op;
-        Calculator.DISPLAY.setValue("0");
+        Calculator.setDisplay(0);
     }
     
     @On(event = CLICK, id="result")
     static void computeTheValue() {
         switch (operation) {
-            case "plus": setValue(memory + getValue()); break;
-            case "minus": setValue(memory - getValue()); break;
-            case "mul": setValue(memory * getValue()); break;
-            case "div": setValue(memory / getValue()); break;
+            case "plus": Calculator.setDisplay(memory + Calculator.getDisplay()); break;
+            case "minus": Calculator.setDisplay(memory - Calculator.getDisplay()); break;
+            case "mul": Calculator.setDisplay(memory * Calculator.getDisplay()); break;
+            case "div": Calculator.setDisplay(memory / Calculator.getDisplay()); break;
             default: throw new IllegalStateException(operation);
         }
     }
@@ -60,30 +63,13 @@
     @On(event = CLICK, id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
     static void addDigit(String digit) {
         digit = digit.substring(1);
-        String v = Calculator.DISPLAY.getValue();
-        if (getValue() == 0.0) {
-            Calculator.DISPLAY.setValue(digit);
+        
+        double v = Calculator.getDisplay();
+        if (v == 0.0) {
+            Calculator.setDisplay(Integer.parseInt(digit));
         } else {
-            Calculator.DISPLAY.setValue(v + digit);
-        }
-    }
-    
-    private static void setValue(double v) {
-        StringBuilder sb = new StringBuilder();
-        sb.append(v);
-        if (sb.toString().endsWith(".0")) {
-            final int l = sb.length();
-            sb.delete(l - 2, l);
-        }
-        Calculator.DISPLAY.setValue(sb.toString());
-    }
-
-    private static double getValue() {
-        try {
-            return Double.parseDouble(Calculator.DISPLAY.getValue());
-        } catch (NumberFormatException ex) {
-            Calculator.DISPLAY.setValue("err");
-            return 0.0;
+            String txt = Double.toString(v) + digit;
+            Calculator.setDisplay(Double.parseDouble(txt));
         }
     }
 }
diff -r 14268cd404a4 -r 854286e49061 javaquery/demo-calculator-dynamic/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml
--- a/javaquery/demo-calculator-dynamic/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml	Sun Jan 20 14:29:10 2013 +0100
+++ b/javaquery/demo-calculator-dynamic/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml	Sun Jan 20 18:20:18 2013 +0100
@@ -46,7 +46,8 @@
         <table border="0" cellspacing="2">
             <tbody>
                 <tr>
-                    <td colspan="4"><input id="display" value="0" 
+                    <td colspan="4"><input data-bind="value:
+                                           display" value="0" 
                             style="text-align: right"/>
                 </td>
                 </tr>
diff -r 14268cd404a4 -r 854286e49061 javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java
--- a/javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java	Sun Jan 20 14:29:10 2013 +0100
+++ b/javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java	Sun Jan 20 18:20:18 2013 +0100
@@ -20,6 +20,7 @@
 import org.apidesign.bck2brwsr.htmlpage.api.On;
 import static org.apidesign.bck2brwsr.htmlpage.api.OnEvent.*;
 import org.apidesign.bck2brwsr.htmlpage.api.Page;
+import org.apidesign.bck2brwsr.htmlpage.api.Property;
 
 /** HTML5 & Java demo showing the power of 
  * <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
@@ -27,7 +28,9 @@
  * 
  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
  */
-@Page(xhtml="Calculator.xhtml")
+@Page(xhtml="Calculator.xhtml", properties = {
+    @Property(name = "display", type = double.class)
+})
 public class App {
     private static double memory;
     private static String operation;
@@ -36,23 +39,23 @@
     static void clear() {
         memory = 0;
         operation = null;
-        Calculator.DISPLAY.setValue("0");
+        Calculator.setDisplay(0);
     }
     
     @On(event = CLICK, id= { "plus", "minus", "mul", "div" })
     static void applyOp(String op) {
-        memory = getValue();
+        memory = Calculator.getDisplay();
         operation = op;
-        Calculator.DISPLAY.setValue("0");
+        Calculator.setDisplay(0);
     }
     
     @On(event = CLICK, id="result")
     static void computeTheValue() {
         switch (operation) {
-            case "plus": setValue(memory + getValue()); break;
-            case "minus": setValue(memory - getValue()); break;
-            case "mul": setValue(memory * getValue()); break;
-            case "div": setValue(memory / getValue()); break;
+            case "plus": Calculator.setDisplay(memory + Calculator.getDisplay()); break;
+            case "minus": Calculator.setDisplay(memory - Calculator.getDisplay()); break;
+            case "mul": Calculator.setDisplay(memory * Calculator.getDisplay()); break;
+            case "div": Calculator.setDisplay(memory / Calculator.getDisplay()); break;
             default: throw new IllegalStateException(operation);
         }
     }
@@ -60,30 +63,19 @@
     @On(event = CLICK, id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
     static void addDigit(String digit) {
         digit = digit.substring(1);
-        String v = Calculator.DISPLAY.getValue();
-        if (getValue() == 0.0) {
-            Calculator.DISPLAY.setValue(digit);
+        
+        double v = Calculator.getDisplay();
+        if (v == 0.0) {
+            Calculator.setDisplay(Integer.parseInt(digit));
         } else {
-            Calculator.DISPLAY.setValue(v + digit);
+            String txt = Double.toString(v) + digit;
+            Calculator.setDisplay(Double.parseDouble(txt));
         }
     }
     
-    private static void setValue(double v) {
-        StringBuilder sb = new StringBuilder();
-        sb.append(v);
-        if (sb.toString().endsWith(".0")) {
-            final int l = sb.length();
-            sb.delete(l - 2, l);
-        }
-        Calculator.DISPLAY.setValue(sb.toString());
-    }
-
-    private static double getValue() {
-        try {
-            return Double.parseDouble(Calculator.DISPLAY.getValue());
-        } catch (NumberFormatException ex) {
-            Calculator.DISPLAY.setValue("err");
-            return 0.0;
-        }
+    
+    static {
+        Calculator.setDisplay(10.0);
+        Calculator.applyBindings();
     }
 }
diff -r 14268cd404a4 -r 854286e49061 javaquery/demo-calculator/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml
--- a/javaquery/demo-calculator/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml	Sun Jan 20 14:29:10 2013 +0100
+++ b/javaquery/demo-calculator/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml	Sun Jan 20 18:20:18 2013 +0100
@@ -46,7 +46,7 @@
         <table border="0" cellspacing="2">
             <tbody>
                 <tr>
-                    <td colspan="4"><input id="display" value="0" 
+                    <td colspan="4"><input data-bind="value: display" value="0" 
                             style="text-align: right"/>
                 </td>
                 </tr>
diff -r 14268cd404a4 -r 854286e49061 pom.xml
--- a/pom.xml	Sun Jan 20 14:29:10 2013 +0100
+++ b/pom.xml	Sun Jan 20 18:20:18 2013 +0100
@@ -75,6 +75,7 @@
                        <exclude>.*/**</exclude>
                        <exclude>mojo/src/main/resources/archetype-resources/**</exclude>
                        <exclude>vmtest/src/test/resources/**</exclude>
+                       <exclude>javaquery/api/src/main/resources/org/apidesign/bck2brwsr/htmlpage/knockout*.js</exclude>
                   </excludes>
               </configuration>
           </plugin>
@@ -112,4 +113,4 @@
   <properties>
       <license>COPYING</license>
   </properties>
-</project>
\ No newline at end of file
+</project>