X-Git-Url: https://git.mdrn.pl/fnpeditor.git/blobdiff_plain/fcecb8e0ed56cd955b1d2bcbc12e2675f40f0243..e0b4f012ea85b4b1bc58f2b8531cef068bf572df:/src/smartxml/smartxml.js

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index d168e6d..c23e06d 100644
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -66,7 +66,7 @@ $.extend(DocumentNode.prototype, {
             }
         });
 
-        if(idx !== 'undefined') {
+        if(idx !== undefined) {
             nodePath = nodePath.slice(0, idx);
         }
         toret = nodePath.map(function(node) {return node.getIndex(); });
@@ -123,6 +123,9 @@ $.extend(DocumentNode.prototype, {
         var node = (metaData && metaData.node) ? metaData.node : this,
             event = new events.ChangeEvent(type, $.extend({node: node}, metaData || {}));
         if(type === 'nodeDetached' || this.document.containsNode(event.meta.node)) {
+            if(type === 'nodeMoved') {
+                event.meta.parent = origParent;
+            }
             this.document.trigger('change', event);
         }
         if((type === 'nodeAdded' || type === 'nodeMoved') && !this.document.containsNode(this) && nodeWasContained) {
@@ -203,6 +206,10 @@ $.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());
@@ -266,7 +273,7 @@ var registerMethod = function(methodName, method, target) {
 var Document = function(xml, extensions) {
     this.undoStack = [];
     this.redoStack = [];
-    this._transactionStack = [];
+    this._currentTransaction = null;
     this._transformationLevel = 0;
     
     this._nodeMethods = {};
@@ -354,7 +361,7 @@ $.extend(Document.prototype, Backbone.Events, {
     },
 
     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) {
@@ -366,13 +373,17 @@ $.extend(Document.prototype, Backbone.Events, {
             return noSiblingParents;
         }
 
-        var i;
-        for(i = 0; i < Math.min(parents1.length, parents2.length); i++) {
+        var stop = Math.min(parents1.length, parents2.length),
+            i;
+        for(i = 0; i < stop; i++) {
             if(parents1[i].sameNode(parents2[i])) {
                 continue;
             }
             break;
         }
+        if(i === stop) {
+            i--;
+        }
         return {node1: parents1[i], node2: parents2[i]};
     },
 
@@ -441,9 +452,36 @@ $.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) {
         var toret, transformation;
 
+        if(!this._currentTransaction) {
+            return this.transaction(function() {
+                return this.transform(Transformation, args);
+            }, this);
+        }
+
         if(typeof Transformation === 'function') {
             transformation = new Transformation(this, this, args);
         } else {
@@ -451,17 +489,20 @@ $.extend(Document.prototype, Backbone.Events, {
         }
         if(transformation) {
             this._transformationLevel++;
-            toret = transformation.run({beUndoable:this._transformationLevel === 1});
-            if(this._transformationLevel === 1 && !this._undoInProgress) {
-                if(this._transactionInProgress) {
-                    this._transactionStack.push(transformation);
-                } else {
-                    this.undoStack.push(transformation);
+            
+            this.ifChanged(
+                this,
+                function() {
+                    toret = transformation.run({beUndoable:this._transformationLevel === 1});
+                },
+                function() {
+                    if(this._transformationLevel === 1 && !this._undoInProgress) {
+                        this._currentTransaction.pushTransformation(transformation);
+                        this.redoStack = [];
+                    }
                 }
-            }
-            if(!this._undoInProgress && this._transformationLevel === 1) {
-                this.redoStack = [];
-            }
+            );
+
             this._transformationLevel--;
             return toret;
         } else {
@@ -469,20 +510,15 @@ $.extend(Document.prototype, Backbone.Events, {
         }
     },
     undo: function() {
-        var transformationObject = this.undoStack.pop(),
+        var transaction = this.undoStack.pop(),
             doc = this,
             transformations, stopAt;
 
-        if(transformationObject) {
+        if(transaction) {
             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];
-            }
+            // We will modify this array in a minute so make sure we work on a copy.
+            transformations = transaction.transformations.slice(0);
 
             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.
@@ -505,39 +541,66 @@ $.extend(Document.prototype, Backbone.Events, {
             });
 
             this._undoInProgress = false;
-            this.redoStack.push(transformationObject);
+            this.redoStack.push(transaction);
         }
     },
     redo: function() {
-        var transformationObject = this.redoStack.pop(),
-            transformations;
-        if(transformationObject) {
+        var transaction = this.redoStack.pop();
+        if(transaction) {
             this._transformationLevel++;
-            transformations = _.isArray(transformationObject) ? transformationObject : [transformationObject];
-            transformations.forEach(function(t) {
+            transaction.transformations.forEach(function(t) {
                 t.run({beUndoable: true});
             });
             this._transformationLevel--;
-            this.undoStack.push(transformationObject);
+            this.undoStack.push(transaction);
         }
     },
 
-    startTransaction: function() {
-        if(this._transactionInProgress) {
+    startTransaction: function(metadata) {
+        if(this._currentTransaction) {
             throw new Error('Nested transactions not supported!');
         }
-        this._transactionInProgress = true;
+        this._rollbackBackup = this.root.clone();
+        this._currentTransaction = new Transaction([], metadata);
     },
 
     endTransaction: function() {
-        if(!this._transactionInProgress) {
+        if(!this._currentTransaction) {
             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 = [];
+        if(this._currentTransaction.hasTransformations()) {
+            this.undoStack.push(this._currentTransaction);
+        }
+        this._currentTransaction = null;
+    },
+
+    rollbackTransaction: function() {
+        if(!this._currentTransaction) {
+            throw new Error('Transaction rollback requested, but there is no transaction in progress!');
+        }
+        this.replaceRoot(this._rollbackBackup);
+        this._rollbackBackup = null;
+        this._currentTransaction = null;
+    },
+
+    transaction: function(callback, params) {
+        var toret;
+        params = params || {};
+        this.startTransaction(params.metadata);
+        try {
+            toret = callback.call(params.context || this);
+        } catch(e) {
+            if(params.error) {
+                params.error(e);
+            }
+            this.rollbackTransaction();
+            return;
+        }
+        this.endTransaction();
+        if(params.success) {
+            params.success(toret);
         }
+        return toret;
     },
 
     getNodeByPath: function(path) {
@@ -551,14 +614,33 @@ $.extend(Document.prototype, Backbone.Events, {
     _defineDocumentProperties: function($document) {
         var doc = this;
         Object.defineProperty(doc, 'root', {get: function() {
+            if(!$document) {
+                return null;
+            }
             return doc.createDocumentNode($document[0]);
         }, configurable: true});
         Object.defineProperty(doc, 'dom', {get: function() {
+            if(!$document) {
+                return null;
+            }
             return $document[0];
         }, configurable: true});
     }
 });
 
+var Transaction = function(transformations, metadata) {
+    this.transformations = transformations || [];
+    this.metadata = metadata;
+};
+$.extend(Transaction.prototype, {
+    pushTransformation: function(transformation) {
+        this.transformations.push(transformation);
+    },
+    hasTransformations: function() {
+        return this.transformations.length > 0;
+    }
+});
+
 
 return {
     documentFromXML: function(xml) {