Handling del/ctrl-x (wip)

[fnpeditor.git] / modules / documentCanvas / canvas / canvas.js

diff --git a/modules/documentCanvas/canvas/canvas.js b/modules/documentCanvas/canvas/canvas.js
index 318a22f..25fe689 100644 (file)
--- a/modules/documentCanvas/canvas/canvas.js
+++ b/modules/documentCanvas/canvas/canvas.js
@@ -173,7 +173,10 @@ $.extend(Canvas.prototype, {
                 ARROW_LEFT: 37,
                 ARROW_UP: 38,
                 ARROW_RIGHT: 39,
-                ARROW_DOWN: 40
+                ARROW_DOWN: 40,
+                BACKSPACE: 8,
+                DELETE: 46,
+                X: 88
             }
 
             this.wrapper.on('keyup', function(e) {
@@ -197,9 +200,11 @@ $.extend(Canvas.prototype, {
             });
          
             this.wrapper.on('keydown', function(e) {
+                var cursor = canvas.getCursor(),
+                    position = canvas.getCursor().getPosition(),
+                    element = position.element;
                 if(e.which >= 37 && e.which <= 40) {
-                    var position = canvas.getCursor().getPosition(),
-                        element = position.element;
+
                     if(element && (element instanceof documentElement.DocumentTextElement)) {
                         if(element.isEmpty()) {
                             var direction, caretTo;
@@ -227,6 +232,65 @@ $.extend(Canvas.prototype, {
 
 
                 }
+
+                var selectsWholeTextElement = function() {
+                    if(cursor.isSelecting() && cursor.getSelectionStart().offsetAtBeginning && cursor.getSelectionEnd().offsetAtEnd)
+                        return true;
+                    return false;
+                }
+
+                if(e.which === KEYS.X && e.ctrlKey && selectsWholeTextElement()) {
+                    e.preventDefault();
+                }
+
+                if(e.which === KEYS.BACKSPACE || e.which === KEYS.DELETE) {
+                    if(cursor.isSelecting() && !cursor.isSelectingWithinElement()) {
+                        e.preventDefault();
+                        return;
+                    }
+                        
+                    var cursorAtOperationEdge = position.offsetAtBeginning;
+                    if(e.which === KEYS.DELETE) {
+                        cursorAtOperationEdge = position.offsetAtEnd;
+                    }
+
+                    if(element.getText().length === 1 || selectsWholeTextElement()) {
+                        e.preventDefault();
+                        element.setText('');
+                    }
+                    else if(element.isEmpty()) {
+
+                        var direction = 'above',
+                            caretTo = 'end';
+                            
+                        if(e.which === KEYS.DELETE) {
+                            direction = 'below';
+                            caretTo = 'start';
+                        }
+
+                        e.preventDefault();
+
+                        var parent = element.parent(),
+                            grandParent = parent ? parent.parent() : null,
+                            goto;
+                        if(parent.children().length === 1) {
+                            if(grandParent && grandParent.children().length === 1) {
+                                goto = grandParent.append({text: ''});
+                            } else {
+                                goto = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0]));
+                            }
+                            parent.detach();
+                        } else {
+                            goto = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0]));
+                            element.detach();
+                        }
+                        canvas.setCurrentElement(goto, {caretTo: caretTo});
+                    }
+                    else if(cursorAtOperationEdge) {
+                        // todo
+                        e.preventDefault();
+                    }
+                }
             });
 
             this.wrapper.on('click', '[document-node-element], [document-text-element]', function(e) {