wip: experiments with Canvas support for exercise.assign

[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 62845e3..3efc450 100644 (file)
--- a/src/editor/modules/documentCanvas/canvas/utils.js
+++ b/src/editor/modules/documentCanvas/canvas/utils.js
@@ -20,39 +20,59 @@ var nearestInDocumentOrder = function(selector, direction, element) {
     return null;
 };
 
+var getElementForElementRootNode = function(node, mirrors, canvasContainer) {
+    if(canvasContainer) {
+        var candidates = [node.getData('canvasElement')].concat(node.getData('mirrorElements')),
+            toret;
+        candidates.some(function(c) {
+            // @@
+            if(c.dom.parents().index(canvasContainer.dom) !== -1) {
+                toret = c;
+                return true;
+            }
+        });
+        return toret;
+    }
+    return node.getData(mirrors ? 'mirrorElements' : 'canvasElement');
+};
 
-var getElementForNode = function(node) {
-
-    var ptr = node.nodeType === Node.TEXT_NODE ? node.parent() : node;
-    while(!ptr.getData('canvasElement')) {
-        ptr = ptr.parent();
+var getElementForNode = function(node, mirrors) {
+    while(!node.getData('canvasElement')) {
+        node = node.parent();
     }
-    return ptr.getData('canvasElement');
+    return node.getData(mirrors ? 'mirrorElements' : 'canvasElement');
 };
 
-var getElementForDetachedNode = function(node, originalParent) {
+var getElementForDetachedNode = function(node, originalParent, mirrors) {
     var ptr = originalParent;
     if(ptr === null) {
-        return node.getData('canvasElement');
+        return node.getData(mirrors ? 'mirrorElements' : 'canvasElement');
     }
     while(!ptr.getData('canvasElement')) {
         ptr = ptr.parent();
     }
-    return ptr.getData('canvasElement');
+    return ptr.getData(mirrors ? 'mirrorElements' : 'canvasElement');
 };
 
-var getElementForTextNode = function(textNode) {
-    var parentElement = getElementForNode(textNode.parent()),
-        toret;
-    parentElement.children().some(function(child) {
-        if(child.wlxmlNode.sameNode(textNode)) {
-            toret = child;
-            return true;
-        }
-    });
-    return toret;
+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 {
+        textNode: textNode,
+        offset: offset
+    };
 };
 
+
 return {
     nearestInDocumentOrder: nearestInDocumentOrder,
     unicode: {
@@ -60,7 +80,8 @@ return {
     },
     getElementForNode: getElementForNode,
     getElementForDetachedNode: getElementForDetachedNode,
-    getElementForTextNode: getElementForTextNode
+    getElementForElementRootNode: getElementForElementRootNode,
+    caretPositionFromPoint: caretPositionFromPoint
 };
 
 });