(bug 32241) Fix flickering behavior in IE. Patch by Lupo. See also r102948

diff --git a/resources/jquery/jquery.textSelection.js b/resources/jquery/jquery.textSelection.js
index 9ba78d2..443722f 100644 (file)
--- a/resources/jquery/jquery.textSelection.js
+++ b/resources/jquery/jquery.textSelection.js
@@ -37,6 +37,19 @@ function rangeForElementIE( e ) {
        }
 }
 
+/**
+ * Helper function for IE for activating the textarea. Called only in the
+ * IE-specific code paths below; makes use of IE-specific non-standard
+ * function setActive() if possible to avoid screen flicker.
+ */
+function activateElementOnIE( element ) {
+       if ( element.setActive ) {
+               element.setActive(); // bug 32241: doesn't scroll
+       } else {
+               $( element ).focus(); // may scroll (but we patched it above)
+       }
+}
+
 var fn = {
 /**
  * Get the contents of the textarea
@@ -54,7 +67,7 @@ getSelection: function() {
        if ( $(e).is( ':hidden' ) ) {
                // Do nothing
        } else if ( document.selection && document.selection.createRange ) {
-               $(e).focus();
+               activateElementOnIE( e );
                var range = document.selection.createRange();
                retval = range.text;
        } else if ( e.selectionStart || e.selectionStart == '0' ) {
@@ -171,7 +184,7 @@ encapsulateSelection: function( options ) {
                        }
                } else if ( document.selection && document.selection.createRange ) {
                        // IE
-                       $(this).focus();
+                       activateElementOnIE( this );
                        if ( context ) {
                                context.fn.restoreCursorAndScrollTop();
                        }
@@ -240,7 +253,7 @@ encapsulateSelection: function( options ) {
                        // the selection ranges when textarea isn't focused. This can
                        // lead to saving a bogus empty selection, which then screws up
                        // whatever we do later (bug 31847).
-                       $(e).focus();
+                       activateElementOnIE( e );
 
                        // IE Support
                        var preFinished = false;