1 files changed, 70 insertions, 0 deletions
diff --git a/scripts/caret.js b/scripts/caret.js
new file mode 100644
index 00000000..fd8fe38d
--- /dev/null
+++ b/scripts/caret.js
@@ -0,0 +1,70 @@
+(function($) {
+  $.fn.caret = function(pos) {
+    var target = this[0];
+	var isContentEditable = target.contentEditable === 'true';
+    //get
+    if (arguments.length == 0) {
+      //HTML5
+      if (window.getSelection) {
+        //contenteditable
+        if (isContentEditable) {
+          target.focus();
+          var range1 = window.getSelection().getRangeAt(0),
+              range2 = range1.cloneRange();
+          range2.selectNodeContents(target);
+          range2.setEnd(range1.endContainer, range1.endOffset);
+          return range2.toString().length;
+        }
+        //textarea
+        return target.selectionStart;
+      }
+      //IE<9
+      if (document.selection) {
+        target.focus();
+        //contenteditable
+        if (isContentEditable) {
+            var range1 = document.selection.createRange(),
+                range2 = document.body.createTextRange();
+            range2.moveToElementText(target);
+            range2.setEndPoint('EndToEnd', range1);
+            return range2.text.length;
+        }
+        //textarea
+        var pos = 0,
+            range = target.createTextRange(),
+            range2 = document.selection.createRange().duplicate(),
+            bookmark = range2.getBookmark();
+        range.moveToBookmark(bookmark);
+        while (range.moveStart('character', -1) !== 0) pos++;
+        return pos;
+      }
+      //not supported
+      return 0;
+    }
+    //set
+    if (pos == -1)
+      pos = this[isContentEditable? 'text' : 'val']().length;
+    //HTML5
+    if (window.getSelection) {
+      //contenteditable
+      if (isContentEditable) {
+        target.focus();
+        window.getSelection().collapse(target.firstChild, pos);
+      }
+      //textarea
+      else
+        target.setSelectionRange(pos, pos);
+    }
+    //IE<9
+    else if (document.body.createTextRange) {
+      var range = document.body.createTextRange();
+      range.moveToElementText(target);
+      range.moveStart('character', pos);
+      range.collapse(true);
+      range.select();
+    }
+    if (!isContentEditable)
+      target.focus();
+    return pos;
+  }
+})(jQuery)
+\ No newline at end of file