X-Git-Url: https://git.mdrn.pl/fnpeditor.git/blobdiff_plain/fd6329db57fc3cc1cf2305da8d0127de4f2198e2..1dfb9c497ad66a5c0025e806bd6ee4777baaf1aa:/src/smartxml/smartxml.js?ds=sidebyside

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index d74ec13..d085742 100644
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -10,9 +10,6 @@ define([
 'use strict';
 /* globals Node */
 
-var TEXT_NODE = Node.TEXT_NODE;
-
-
 
 var DocumentNode = function(nativeNode, document) {
     if(!document) {
@@ -36,18 +33,28 @@ $.extend(DocumentNode.prototype, {
     },
 
     clone: function() {
-        var clone = this._$.clone(true, true);
-        // clone.find('*').addBack().each(function() {
-        //     var n = $(this);
-        //     if(n.data('canvasElement')) {
-        //         n.data('canvasElement', $.extend(true, {}, n.data('canvasElement')));
-        //         n.data('canvasElement').$element = n.data('canvasElement').$element.clone(true, true);
-        //     }
-        // });
+        var clone = this._$.clone(true, true),
+            node = this;
+        clone.find('*').addBack().each(function() {
+            var el = this,
+                clonedData = $(this).data();
+
+            _.pairs(clonedData).forEach(function(pair) {
+                var key = pair[0],
+                    value = pair[1];
+                if(_.isFunction(value.clone)) {
+                    clonedData[key] = value.clone(node.document.createDocumentNode(el));
+                }
+            });
+        });
         return this.document.createDocumentNode(clone[0]);
     },
 
     getPath: function(ancestor) {
+        if(!(this.document.containsNode(this))) {
+            return null;
+        }
+
         var nodePath = [this].concat(this.parents()),
             toret, idx;
         ancestor = ancestor || this.document.root;
@@ -196,6 +203,10 @@ $.extend(ElementNode.prototype, {
         return toret;
     },
 
+    containsNode: function(node) {
+        return node && (node.nativeNode === this.nativeNode || node._$.parents().index(this._$) !== -1);
+    },
+
     toXML: function() {
         var wrapper = $('<div>');
         wrapper.append(this._getXMLDOMToDump());
@@ -228,17 +239,21 @@ $.extend(TextNode.prototype, {
 
 
 var parseXML = function(xml) {
-    return $($.trim(xml))[0];
+    var toret = $($.trim(xml));
+    if(!toret.length) {
+        throw new Error('Unable to parse XML: ' + xml);
+    }
+    return toret[0];
+
 };
 
 var registerTransformation = function(desc, name, target) {
     var Transformation = transformations.createContextTransformation(desc, name);
-    //+ to sie powinna nazywac registerTransformationFromDesc or sth
-    //+ ew. spr czy nie override (tylko jesli powyzej sa prototypy to trudno do nich dojsc)
-    target[name] = function(args) {
-        var instance = this;
+    target[name] = function() {
+        var instance = this,
+            args = Array.prototype.slice.call(arguments, 0);
         return instance.transform(Transformation, args);
-    }
+    };
 };
 
 var registerMethod = function(methodName, method, target) {
@@ -252,10 +267,10 @@ var registerMethod = function(methodName, method, target) {
 };
 
 
-var Document = function(xml) {
-    this.loadXML(xml);
+var Document = function(xml, extensions) {
     this.undoStack = [];
     this.redoStack = [];
+    this._transactionStack = [];
     this._transformationLevel = 0;
     
     this._nodeMethods = {};
@@ -264,6 +279,13 @@ var Document = function(xml) {
     this._nodeTransformations = {};
     this._textNodeTransformations = {};
     this._elementNodeTransformations = {};
+    
+    this.registerExtension(coreTransformations);
+
+    (extensions || []).forEach(function(extension) {
+        this.registerExtension(extension);
+    }.bind(this));
+    this.loadXML(xml);
 };
 
 $.extend(Document.prototype, Backbone.Events, {
@@ -272,17 +294,25 @@ $.extend(Document.prototype, Backbone.Events, {
 
     createDocumentNode: function(from) {
         if(!(from instanceof Node)) {
-            if(from.text !== undefined) {
-                /* globals document */
-                from = document.createTextNode(from.text);
+            if(typeof from === 'string') {
+                from = parseXML(from);
+                this.normalizeXML(from);
             } else {
-                var node = $('<' + from.tagName + '>');
-
-                _.keys(from.attrs || {}).forEach(function(key) {
-                    node.attr(key, from.attrs[key]);
-                });
+                if(from.text !== undefined) {
+                    /* globals document */
+                    from = document.createTextNode(from.text);
+                } else {
+                    if(!from.tagName) {
+                        throw new Error('tagName missing');
+                    }
+                    var node = $('<' + from.tagName + '>');
+
+                    _.keys(from.attrs || {}).forEach(function(key) {
+                        node.attr(key, from.attrs[key]);
+                    });
 
-                from = node[0];
+                    from = node[0];
+                }
             }
         }
         var Factory, typeMethods, typeTransformations;
@@ -298,25 +328,37 @@ $.extend(Document.prototype, Backbone.Events, {
         var toret = new Factory(from, this);
         _.extend(toret, this._nodeMethods);
         _.extend(toret, typeMethods);
+        
         _.extend(toret, this._nodeTransformations);
         _.extend(toret, typeTransformations);
+        
+        toret.__super__ = _.extend({}, this._nodeMethods, this._nodeTransformations);
+        _.keys(toret.__super__).forEach(function(key) {
+            toret.__super__[key] = _.bind(toret.__super__[key], toret);
+        });
+
         return toret;
     },
 
     loadXML: function(xml, options) {
         options = options || {};
-        defineDocumentProperties(this, $(parseXML(xml)));
+        this._defineDocumentProperties($(parseXML(xml)));
+        this.normalizeXML(this.dom);
         if(!options.silent) {
             this.trigger('contentSet');
         }
     },
 
+    normalizeXML: function(nativeNode) {
+        void(nativeNode); // noop
+    },
+
     toXML: function() {
         return this.root.toXML();
     },
 
     containsNode: function(node) {
-        return this.root && (node.nativeNode === this.root.nativeNode || node._$.parents().index(this.root._$) !== -1);
+        return this.root && this.root.containsNode(node);
     },
 
     getSiblingParents: function(params) {
@@ -339,7 +381,6 @@ $.extend(Document.prototype, Backbone.Events, {
     },
 
     trigger: function() {
-        //console.log('trigger: ' + arguments[0] + (arguments[1] ? ', ' + arguments[1].type : ''));
         Backbone.Events.trigger.apply(this, arguments);
     },
 
@@ -378,9 +419,7 @@ $.extend(Document.prototype, Backbone.Events, {
     },
 
     registerExtension: function(extension) {
-        //debugger;
-        var doc = this,
-            existingPropertyNames = _.values(this);
+        var doc = this;
 
         ['document', 'documentNode', 'elementNode', 'textNode'].forEach(function(dstName) {
             var dstExtension = extension[dstName];
@@ -406,12 +445,30 @@ $.extend(Document.prototype, Backbone.Events, {
         });
     },
 
+    ifChanged: function(context, action, documentChangedHandler, documentUnchangedHandler) {
+        var hasChanged = false,
+            changeMonitor = function() {
+                hasChanged = true;
+            };
+
+        this.on('change', changeMonitor);
+        action.call(context);
+        this.off('change', changeMonitor);
+        
+        if(hasChanged) {
+            if(documentChangedHandler) {
+                documentChangedHandler.call(context);
+            }
+        } else {
+            if(documentUnchangedHandler) {
+                documentUnchangedHandler.call(context);
+            }
+        }
+    },
+
     transform: function(Transformation, args) {
-        //console.log('transform');
         var toret, transformation;
 
-        // ref: odrebnie przygotowanie transformacji, odrebnie jej wykonanie (to pierwsze to analog transform z node)
-
         if(typeof Transformation === 'function') {
             transformation = new Transformation(this, this, args);
         } else {
@@ -419,56 +476,133 @@ $.extend(Document.prototype, Backbone.Events, {
         }
         if(transformation) {
             this._transformationLevel++;
-            toret = transformation.run();
-            if(this._transformationLevel === 1) {
-                this.undoStack.push(transformation);
-            }
+            
+            this.ifChanged(
+                this,
+                function() {
+                    toret = transformation.run({beUndoable:this._transformationLevel === 1});
+                },
+                function() {
+                    if(this._transformationLevel === 1 && !this._undoInProgress) {
+                        if(this._transactionInProgress) {
+                            this._transactionStack.push(transformation);
+                        } else {
+                            this.undoStack.push(transformation);
+                        }
+                    }
+                    if(!this._undoInProgress && this._transformationLevel === 1) {
+                        this.redoStack = [];
+                    }
+                }
+            );
+
             this._transformationLevel--;
-            //console.log('clearing redo stack');
-            this.redoStack = [];
             return toret;
         } else {
             throw new Error('Transformation ' + transformation + ' doesn\'t exist!');
         }
     },
     undo: function() {
-        var transformation = this.undoStack.pop();
-        if(transformation) {
-            transformation.undo();
-            this.redoStack.push(transformation);
+        var transformationObject = this.undoStack.pop(),
+            doc = this,
+            transformations, stopAt;
+
+        if(transformationObject) {
+            this._undoInProgress = true;
+
+            if(_.isArray(transformationObject)) {
+                // We will modify this array in a minute so make sure we work on a copy.
+                transformations = transformationObject.slice(0);
+            } else {
+                // Lets normalize single transformation to a transaction containing one transformation.
+                transformations = [transformationObject];
+            }
+
+            if(transformations.length > 1) {
+                // In case of real transactions we don't want to run undo on all of transformations if we don't have to.
+                stopAt = undefined;
+                transformations.some(function(t, idx) {
+                    if(!t.undo && t.getChangeRoot().sameNode(doc.root)) {
+                        stopAt = idx;
+                        return true; //break
+                    }
+                });
+                if(stopAt !== undefined) {
+                    // We will get away with undoing only this transformations as the one at stopAt reverses the whole document.
+                    transformations = transformations.slice(0, stopAt+1);
+                }
+            }
+
+            transformations.reverse();
+            transformations.forEach(function(t) {
+                t.undo();
+            });
+
+            this._undoInProgress = false;
+            this.redoStack.push(transformationObject);
         }
     },
     redo: function() {
-        var transformation = this.redoStack.pop();
-        if(transformation) {
-            transformation.run();
-            this.undoStack.push(transformation);
+        var transformationObject = this.redoStack.pop(),
+            transformations;
+        if(transformationObject) {
+            this._transformationLevel++;
+            transformations = _.isArray(transformationObject) ? transformationObject : [transformationObject];
+            transformations.forEach(function(t) {
+                t.run({beUndoable: true});
+            });
+            this._transformationLevel--;
+            this.undoStack.push(transformationObject);
         }
     },
 
+    startTransaction: function() {
+        if(this._transactionInProgress) {
+            throw new Error('Nested transactions not supported!');
+        }
+        this._transactionInProgress = true;
+    },
+
+    endTransaction: function() {
+        if(!this._transactionInProgress) {
+            throw new Error('End of transaction requested, but there is no transaction in progress!');
+        }
+        this._transactionInProgress = false;
+        if(this._transactionStack.length) {
+            this.undoStack.push(this._transactionStack);
+            this._transactionStack = [];
+        }
+    },
+
+    transaction: function(callback, context) {
+        this.startTransaction();
+        callback.call(context);
+        this.endTransaction();
+    },
+
     getNodeByPath: function(path) {
         var toret = this.root;
         path.forEach(function(idx) {
             toret = toret.contents()[idx];
         });
         return toret;
+    },
+
+    _defineDocumentProperties: function($document) {
+        var doc = this;
+        Object.defineProperty(doc, 'root', {get: function() {
+            return doc.createDocumentNode($document[0]);
+        }, configurable: true});
+        Object.defineProperty(doc, 'dom', {get: function() {
+            return $document[0];
+        }, configurable: true});
     }
 });
 
-var defineDocumentProperties = function(doc, $document) {
-    Object.defineProperty(doc, 'root', {get: function() {
-        return doc.createDocumentNode($document[0]);
-    }, configurable: true});
-    Object.defineProperty(doc, 'dom', {get: function() {
-        return $document[0];
-    }, configurable: true});
-};
-
 
 return {
     documentFromXML: function(xml) {
         var doc = new Document(xml);
-        doc.registerExtension(coreTransformations);
         return doc;
     },