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editor: core plugin - edumed - first take on replace exercise
[fnpeditor.git] / src / smartxml / transformations.js
diff --git a/src/smartxml/transformations.js b/src/smartxml/transformations.js
index 5e461ee..4a8e5a8 100644 (file)
--- a/src/smartxml/transformations.js
+++ b/src/smartxml/transformations.js
@@ -5,12 +5,13 @@ define(function(require) {
 var _ = require('libs/underscore'),
     toret = {};
 
 var _ = require('libs/underscore'),
     toret = {};
 
-var getTransDesc = function(desc, name) {
+
+var getTransDesc = function(desc) {
     if(typeof desc === 'function') {
         desc = {impl: desc};
     }
     if(!desc.impl) {
     if(typeof desc === 'function') {
         desc = {impl: desc};
     }
     if(!desc.impl) {
-        throw new Error('Got transformation description without implementation.')
+        throw new Error('Got transformation description without implementation.');
     }
     return desc;
 };
     }
     return desc;
 };
@@ -20,67 +21,37 @@ toret.createGenericTransformation = function(desc, name) {
     
     var GenericTransformation = function(document, args) {
         this.args = args || [];
     
     var GenericTransformation = function(document, args) {
         this.args = args || [];
-
         var transformation = this;
         var transformation = this;
-        // _.keys(this.args).forEach(function(key) {
-        //     if(transformation.args[key].nodeType) { //@@ change to instanceof check, fix circular dependency
-        //         var value = transformation.args[key],
-        //             path = value.getPath();
-        //         Object.defineProperty(transformation.args, key, {
-        //             get: function() {
-        //                 if(transformation.hasRun) {
-        //                     //console.log('returning via path');
-        //                     return transformation.document.getNodeByPath(path);
-        //                 } else {
-        //                     //console.log('returning original arg');
-        //                     return value;
-
-        //                 }
-        //             }
-        //         });
-        //     }
-        // });
-
-        // potem spr na dotychczasowych undo/redo tests;
         
         
+        var patchObject = function(obj, depth) {
+            depth = _.isNumber(depth) ? depth : 1;
+            if(depth > 3) {
+                return;
+            }
+            _.keys(obj).forEach(function(key) {
+                var value = obj[key];
+                if(value) {
+                    if(value.nodeType) {
+                        transformation.wrapNodeProperty(obj, key);
+                    } else if(_.isObject(value)) {
+                        patchObject(value, depth+1);
+                    }
+                }
+            });
+        };
 
         this.args.forEach(function(arg, idx, args) {
 
         this.args.forEach(function(arg, idx, args) {
-            var path;
             if(arg) {
                 if(arg.nodeType) { // ~
             if(arg) {
                 if(arg.nodeType) { // ~
-                    path = arg.getPath();
-                    Object.defineProperty(args, idx, {
-                        get: function() {
-                            if(transformation.hasRun && path) {
-                                return transformation.document.getNodeByPath(path);
-                            } else {
-                                return arg;
-                            }
-                        }
-                    });
+                    transformation.wrapNodeProperty(args, idx);
                 } else if(_.isObject(arg)) {
                 } else if(_.isObject(arg)) {
-                    _.keys(arg).forEach(function(key) {
-                        var value = arg[key],
-                            path;
-                        if(value && value.nodeType) {
-                            path = value.getPath();
-                            Object.defineProperty(arg, key, {
-                                get: function() {
-                                    if(transformation.hasRun && path) {
-                                        return transformation.document.getNodeByPath(path);
-                                    } else {
-                                        return value;
-                                    }
-                                }
-                            });   
-                        }
-                    });
+                    patchObject(arg);
                 }
             }
         });
 
         this.document = document;
                 }
             }
         });
 
         this.document = document;
-        this.hasRun = false;
+        this.runCount = 0;
         if(desc.init) {
             desc.init.call(this);
         }
         if(desc.init) {
             desc.init.call(this);
         }
@@ -90,32 +61,57 @@ toret.createGenericTransformation = function(desc, name) {
         run: function(options) {
             var changeRoot;
             if(!desc.undo && options.beUndoable) {
         run: function(options) {
             var changeRoot;
             if(!desc.undo && options.beUndoable) {
-                changeRoot = desc.getChangeRoot ? desc.getChangeRoot.call(this) : this.document.root;
-                this.snapshot = changeRoot.clone();
+                changeRoot = this.getChangeRoot();
+                if(!changeRoot) {
+                     throw new Error(
+                         'Transformation {name} returned invalid change root value'
+                         .replace('{name}', name)
+                     );
+                }
                 this.changeRootPath = changeRoot.getPath();
                 this.changeRootPath = changeRoot.getPath();
+                this.snapshot = changeRoot.clone();
             }
             }
-            //var toret = desc.impl.call(this.context, this.args); // a argumenty do metody?
-            var toret = desc.impl.apply(this.context, this.args);
-            this.hasRun = true;
+            var argsToPass = desc.undo ? [this].concat(this.args) : this.args;
+            var toret = desc.impl.apply(this.context, argsToPass);
+            this.runCount++;
             return toret;
         },
         undo: function() {
             if(desc.undo) {
             return toret;
         },
         undo: function() {
             if(desc.undo) {
-                desc.undo.call(this.context);
+                desc.undo.call(this.context, this);
+                this.runCount++;
             } else {
                 this.document.getNodeByPath(this.changeRootPath).replaceWith(this.snapshot);
             }
         },
             } else {
                 this.document.getNodeByPath(this.changeRootPath).replaceWith(this.snapshot);
             }
         },
+        getChangeRoot: desc.getChangeRoot || function() {
+            return this.document.root;
+        },
+        wrapNodeProperty: function(object, propName, value) {
+            var transformation = this,
+                lastRunNumber = 0,
+                path;
+            
+            value = value || object[propName];
+            if(value && value.nodeType) {
+                path = value.getPath();
+                Object.defineProperty(object, propName, {
+                    get: function() {
+                        if((lastRunNumber !== transformation.runCount) && path) {
+                            value = transformation.document.getNodeByPath(path);
+                            lastRunNumber = transformation.runCount;
+                        }
+                        return value;
+                    }
+                });
+            }
+        }
     });
 
     return GenericTransformation;
 };
     });
 
     return GenericTransformation;
 };
-// var T = createGenericTransformation({impl: function() {}});
-// var t = T(doc, {a:1,b:2,c3:3});
-
 
 toret.createContextTransformation = function(desc, name) {
 
 toret.createContextTransformation = function(desc, name) {
-    // mozna sie pozbyc przez przeniesienie object/context na koniec argumentow konstruktora generic transformation
     var GenericTransformation = toret.createGenericTransformation(desc, name);
 
     var ContextTransformation = function(document, object, args) {
     var GenericTransformation = toret.createGenericTransformation(desc, name);
 
     var ContextTransformation = function(document, object, args) {
@@ -123,78 +119,14 @@ toret.createContextTransformation = function(desc, name) {
 
         if(document === object) {
             this.context = document;
 
         if(document === object) {
             this.context = document;
-        } else {      
-            var contextPath = object.getPath(),
-                transformation = this;
-            Object.defineProperty(this, 'context', {
-                get: function() {
-                    // todo: to jakos inaczej, bo np. this.context w undo transformacji before to juz nie ten sam obiekt
-                    // moze transformacja powinna zwracac zmodyfikowana sciezke do obiektu po dzialaniu run?
-                    
-                    if(transformation.hasRun) {
-                        //console.log('returning via path');
-                        return transformation.document.getNodeByPath(contextPath);
-                    } else {
-                        //console.log('returning original arg');
-                        return object;
-
-                    }
-                }
-            });
+        } else {
+            this.wrapNodeProperty(this, 'context', object);
         }
         }
-    }
+    };
     ContextTransformation.prototype = Object.create(GenericTransformation.prototype);
     return ContextTransformation;
     ContextTransformation.prototype = Object.create(GenericTransformation.prototype);
     return ContextTransformation;
-}
-// var T = createContextTransformation({impl: function() {}});
-// var t = T(doc, node, {a:1,b:2,c3:3});
-///
-
-
-
-toret.TransformationStorage = function() {
-    this._transformations = {};
 };
 
 };
 
-_.extend(toret.TransformationStorage.prototype, {
-    
-    register: function(Transformation) {
-        var list = (this._transformations[Transformation.prototype.name] = this._transformations[Transformation.prototype.name] || []);
-        list.push(Transformation);
-    },
-
-    get: function(name) {
-        var transformations = this._transformations[name];
-        if(!transformations) {
-            throw new Error('Transformation "' + name + '" not found!');
-        }
-        // na razie zwraca pierwsza
-        return transformations[0];
-    }
-});
-
-
-
-// var registerTransformationFromMethod = (object, methodName, desc) {
-//         if(!object[methodName]) {
-//             throw new Exeption('Cannot register transformation from unknown method ' + methodName + ' on ' + object);
-//         }
-//         desc.impl = object[name];
-//         Transformation = createContextTransformation(desc);
-//         object.prototype.registerContextTransformation(name, createContextTransformation(method));
-// };
-
-
-// registerTransformationFromMethod(ElementNode, 'setAttr', {
-//     impl: function(args) {
-//         this.setAttr(args.name, args.value);
-//     },
-//     getChangeRoot: function() {
-//         return this.context;
-//     }
-
-// });
-
 return toret;
 
 });
\ No newline at end of file
 return toret;
 
 });
\ No newline at end of file