Allow message type edition

jquery/common.js

@@ -753,4 +753,56 @@ function utf8_encode(argString)
 	}
 
 	return utftext;
+}
+
+function getCaretPosition(editableDiv) {
+	var caretPos = 0, sel, range;
+	if(window.getSelection) {
+		sel = window.getSelection();
+		if(sel.rangeCount) {
+			range = sel.getRangeAt(0);
+			if(range.commonAncestorContainer.parentNode == editableDiv) {
+				caretPos = range.endOffset;
+			}
+		}
+	}
+	else if(document.selection && document.selection.createRange) {
+		range = document.selection.createRange();
+		if (range.parentElement() == editableDiv) {
+			var tempEl = document.createElement("span");
+			editableDiv.insertBefore(tempEl, editableDiv.firstChild);
+			var tempRange = range.duplicate();
+			tempRange.moveToElementText(tempEl);
+			tempRange.setEndPoint("EndToEnd", range);
+			caretPos = tempRange.text.length;
+		}
+	}
+	return caretPos;
+  }
+
+function setCaretPosition(el, pos) {
+	// Loop through all child nodes
+	for(var node of el.childNodes) {
+		if(node.nodeType == 3){ // we have a text node
+			if(node.length >= pos) {
+				// finally add our range
+				var range = document.createRange(), sel = window.getSelection();
+				range.setStart(node,pos);
+				range.collapse(true);
+				sel.removeAllRanges();
+				sel.addRange(range);
+				return -1; // we are done
+			}
+			else {
+				pos -= node.length;
+            }
+		}
+		else {
+			pos = setCaretPosition(node,pos);
+			if(pos == -1) {
+				return -1; // no need to finish the for loop
+			}
+		}
+	}
+	return pos; // needed because of recursion stuff
 }