editor: Handling backspace/delete on the text boundries

[fnpeditor.git] / src / smartxml / smartxml.js

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index 9c233bd..8bf531b 100644 (file)
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -33,7 +33,20 @@ $.extend(DocumentNode.prototype, {
     },
 
     clone: function() {
     },
 
     clone: function() {

-        var clone = this._$.clone(true, true);
+        var clone = this._$.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]);
     },
 
         return this.document.createDocumentNode(clone[0]);
     },
 


@@ -222,7 +235,12 @@ $.extend(TextNode.prototype, {
 
 
 var parseXML = function(xml) {
 
 
 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 registerTransformation = function(desc, name, target) {


@@ -245,10 +263,10 @@ var registerMethod = function(methodName, method, target) {
 };
 
 
 };
 
 

-var Document = function(xml) {
-    this.loadXML(xml);
+var Document = function(xml, extensions) {

     this.undoStack = [];
     this.redoStack = [];
     this.undoStack = [];
     this.redoStack = [];

+    this._transactionStack = [];

     this._transformationLevel = 0;
     
     this._nodeMethods = {};
     this._transformationLevel = 0;
     
     this._nodeMethods = {};


@@ -259,6 +277,11 @@ var Document = function(xml) {
     this._elementNodeTransformations = {};
     
     this.registerExtension(coreTransformations);
     this._elementNodeTransformations = {};
     
     this.registerExtension(coreTransformations);

+
+    (extensions || []).forEach(function(extension) {
+        this.registerExtension(extension);
+    }.bind(this));
+    this.loadXML(xml);

 };
 
 $.extend(Document.prototype, Backbone.Events, {
 };
 
 $.extend(Document.prototype, Backbone.Events, {


@@ -267,17 +290,25 @@ $.extend(Document.prototype, Backbone.Events, {
 
     createDocumentNode: function(from) {
         if(!(from instanceof Node)) {
 
     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 {
             } 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;
             }
         }
         var Factory, typeMethods, typeTransformations;


@@ -308,11 +339,16 @@ $.extend(Document.prototype, Backbone.Events, {
     loadXML: function(xml, options) {
         options = options || {};
         this._defineDocumentProperties($(parseXML(xml)));
     loadXML: function(xml, options) {
         options = options || {};
         this._defineDocumentProperties($(parseXML(xml)));

+        this.normalizeXML(this.dom);

         if(!options.silent) {
             this.trigger('contentSet');
         }
     },
 
         if(!options.silent) {
             this.trigger('contentSet');
         }
     },
 

+    normalizeXML: function(nativeNode) {
+        void(nativeNode); // noop
+    },
+

     toXML: function() {
         return this.root.toXML();
     },
     toXML: function() {
         return this.root.toXML();
     },


@@ -405,6 +441,27 @@ $.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;
 
     transform: function(Transformation, args) {
         var toret, transformation;
 


@@ -415,36 +472,101 @@ $.extend(Document.prototype, Backbone.Events, {
         }
         if(transformation) {
             this._transformationLevel++;
         }
         if(transformation) {
             this._transformationLevel++;

-            toret = transformation.run({beUndoable:this._transformationLevel === 1});
-            if(this._transformationLevel === 1 && !this._undoInProgress) {
-                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--;
             this._transformationLevel--;

-            if(!this._undoInProgress) {
-                this.redoStack = [];
-            }

             return toret;
         } else {
             throw new Error('Transformation ' + transformation + ' doesn\'t exist!');
         }
     },
     undo: function() {
             return toret;
         } else {
             throw new Error('Transformation ' + transformation + ' doesn\'t exist!');
         }
     },
     undo: function() {

-        var transformation = this.undoStack.pop();
-        if(transformation) {
+        var transformationObject = this.undoStack.pop(),
+            doc = this,
+            transformations, stopAt;
+
+        if(transformationObject) {

             this._undoInProgress = true;
             this._undoInProgress = true;

-            transformation.undo();
+
+            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._undoInProgress = false;

-            this.redoStack.push(transformation);
+            this.redoStack.push(transformationObject);

         }
     },
     redo: function() {
         }
     },
     redo: function() {

-        var transformation = this.redoStack.pop();
-        if(transformation) {
+        var transformationObject = this.redoStack.pop(),
+            transformations;
+        if(transformationObject) {

             this._transformationLevel++;
             this._transformationLevel++;

-            transformation.run({beUndoable: true});
+            transformations = _.isArray(transformationObject) ? transformationObject : [transformationObject];
+            transformations.forEach(function(t) {
+                t.run({beUndoable: true});
+            });

             this._transformationLevel--;
             this._transformationLevel--;

-            this.undoStack.push(transformation);
+            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 = [];

         }
     },
 
         }
     },