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 e1f0a55..3efc450 100644 (file)
--- a/src/editor/modules/documentCanvas/canvas/utils.js
+++ b/src/editor/modules/documentCanvas/canvas/utils.js
@@ -3,7 +3,7 @@ define([
 ], function($) {
     
 'use strict';
 ], function($) {
     
 'use strict';

-
+/* globals Node */

 
 var nearestInDocumentOrder = function(selector, direction, element) {
     var parents = $(element).parents(),
 
 var nearestInDocumentOrder = function(selector, direction, element) {
     var parents = $(element).parents(),


@@ -20,46 +20,68 @@ var nearestInDocumentOrder = function(selector, direction, element) {
     return null;
 };
 
     return null;
 };
 

-var findCanvasElement = function(node) {
-    if(node.nodeType === Node.ELEMENT_NODE) {
-        return node.getData('canvasElement');
+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;

     }
     }

-    if(node.nodeType === Node.TEXT_NODE) {
-        return findCanvasElementInParent(node, node.parent());
+    return node.getData(mirrors ? 'mirrorElements' : 'canvasElement');
+};
+
+var getElementForNode = function(node, mirrors) {
+    while(!node.getData('canvasElement')) {
+        node = node.parent();

     }
     }

+    return node.getData(mirrors ? 'mirrorElements' : '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;
+var getElementForDetachedNode = function(node, originalParent, mirrors) {
+    var ptr = originalParent;
+    if(ptr === null) {
+        return node.getData(mirrors ? 'mirrorElements' : 'canvasElement');
+    }
+    while(!ptr.getData('canvasElement')) {
+        ptr = ptr.parent();
+    }
+    return ptr.getData(mirrors ? 'mirrorElements' : 'canvasElement');
+};

 
 

-    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,
 return {
     nearestInDocumentOrder: nearestInDocumentOrder,

-    findCanvasElement: findCanvasElement,
-    findCanvasElementInParent: findCanvasElementInParent,

     unicode: {
         ZWS: '\u200B'
     unicode: {
         ZWS: '\u200B'

-    }
+    },
+    getElementForNode: getElementForNode,
+    getElementForDetachedNode: getElementForDetachedNode,
+    getElementForElementRootNode: getElementForElementRootNode,
+    caretPositionFromPoint: caretPositionFromPoint

 };
 
 });
 };
 
 });