tutorial in editor (mechanics only)

[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 337f4d3..620e652 100644 (file)
--- a/src/editor/modules/documentCanvas/canvas/utils.js
+++ b/src/editor/modules/documentCanvas/canvas/utils.js
@@ -20,46 +20,56 @@ var nearestInDocumentOrder = function(selector, direction, element) {
     return null;
 };
 
-var findCanvasElement = function(node, childOf) {
-    if(node.nodeType === Node.ELEMENT_NODE) {
+var getElementForElementRootNode = function(node) {
+    return node.getData('canvasElement');
+};
+
+var getElementForNode = function(node) {
+    while(!node.getData('canvasElement')) {
+        node = node.parent();
+    }
+    return node.getData('canvasElement');
+};
+
+var getElementForDetachedNode = function(node, originalParent) {
+    var ptr = originalParent;
+    if(ptr === null) {
         return node.getData('canvasElement');
     }
-    if(node.nodeType === Node.TEXT_NODE) {
-        return findCanvasElementInParent(node, childOf || node.parent());
+    while(!ptr.getData('canvasElement')) {
+        ptr = ptr.parent();
     }
+    return ptr.getData('canvasElement');
 };
 
-/**
- * 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;
-            }
-        });
+var caretPositionFromPoint = function(x, y) {
+    /* globals document */
+    var range, textNode, offset;
+    if(document.caretPositionFromPoint) {
+        range = document.caretPositionFromPoint(x, y);
+        textNode = range.offsetNode;
+        offset = range.offset;
+    } else if(document.caretRangeFromPoint) {
+        range = document.caretRangeFromPoint(x, y);
+        textNode = range.startContainer;
+        offset = range.startOffset;
     }
-    return toret;
+    return {
+        textNode: textNode,
+        offset: offset
+    };
 };
 
+
 return {
     nearestInDocumentOrder: nearestInDocumentOrder,
-    findCanvasElement: findCanvasElement,
-    findCanvasElementInParent: findCanvasElementInParent,
     unicode: {
         ZWS: '\u200B'
-    }
+    },
+    getElementForNode: getElementForNode,
+    getElementForDetachedNode: getElementForDetachedNode,
+    getElementForElementRootNode: getElementForElementRootNode,
+    caretPositionFromPoint: caretPositionFromPoint
 };
 
 });