editor: Handling backspace/delete on the text boundries

[fnpeditor.git] / src / editor / modules / documentCanvas / canvas / utils.js

diff --git a/src/editor/modules/documentCanvas/canvas/utils.js b/src/editor/modules/documentCanvas/canvas/utils.js
index 0eb19d0..ae20a09 100644 (file)
--- a/src/editor/modules/documentCanvas/canvas/utils.js
+++ b/src/editor/modules/documentCanvas/canvas/utils.js
@@ -3,13 +3,14 @@ define([
 ], function($) {
     
 'use strict';
-
+/* globals Node */
 
 var nearestInDocumentOrder = function(selector, direction, element) {
     var parents = $(element).parents(),
         parent = parents.length ? $(parents[parents.length-1]) : element;
 
     var adj = parent.find(selector).filter(function() {
+        /*jshint bitwise: false*/
         return this.compareDocumentPosition(element) & (direction === 'above' ? Node.DOCUMENT_POSITION_FOLLOWING : Node.DOCUMENT_POSITION_PRECEDING);
     });
 
@@ -17,10 +18,45 @@ var nearestInDocumentOrder = function(selector, direction, element) {
         return adj[direction === 'above' ? adj.length-1 : 0];
     }
     return null;
-}
+};
+
+var findCanvasElement = function(node) {
+    if(node.nodeType === Node.ELEMENT_NODE) {
+        return node.getData('canvasElement');
+    }
+    if(node.nodeType === Node.TEXT_NODE) {
+        return findCanvasElementInParent(node, node.parent());
+    }
+};
+
+/**
+ * We take child and its parent as arguments separatly to
+ * handle situation where child was removed from WLXMLDocument
+ * and it lost reference to its parent (but we may still have it on canvas).
+*/
+var findCanvasElementInParent = function(wlxmlChildNode, wlxmlParentNode) {
+    var parentElement, toret;
+
+    if(wlxmlParentNode === null) {
+        toret = wlxmlChildNode.getData('canvasElement');
+        if(toret.parent()) {
+            throw new Error('This should never happen: root canvas element doesn\'t render root document node!');
+        }
+    } else {
+        parentElement = findCanvasElement(wlxmlParentNode);
+        parentElement.children().forEach(function(child) {
+            if(child.data('wlxmlNode').sameNode(wlxmlChildNode)) { // czemu tu, przy drugim undo child nie mial data?
+                toret = child;
+            }
+        });
+    }
+    return toret;
+};
 
 return {
     nearestInDocumentOrder: nearestInDocumentOrder,
+    findCanvasElement: findCanvasElement,
+    findCanvasElementInParent: findCanvasElementInParent,
     unicode: {
         ZWS: '\u200B'
     }