mw.widgets.CategorySelector: Prevent duplicates

CapsuleMultiSelectWidget should take care of it by itself, but its
logic is foiled by how we canonicalize the data.

Bug: T122219
Change-Id: I2bdc3681dfde3080067ea12e5a036824d154a72f

diff --git a/resources/src/mediawiki.widgets/mw.widgets.CategorySelector.js b/resources/src/mediawiki.widgets/mw.widgets.CategorySelector.js
index 59f1d50..1e65da5 100644 (file)
--- a/resources/src/mediawiki.widgets/mw.widgets.CategorySelector.js
+++ b/resources/src/mediawiki.widgets/mw.widgets.CategorySelector.js
@@ -184,6 +184,16 @@
                } );
        };
 
+       /**
+        * @inheritdoc
+        */
+       CSP.getItemFromData = function ( data ) {
+               // This is a bit of a hack... We have to canonicalize the data in the same way that
+               // #createItemWidget and CategoryCapsuleItemWidget will do, otherwise we won't find duplicates.
+               data = mw.Title.newFromText( data, NS_CATEGORY ).getMainText();
+               return OO.ui.mixin.GroupElement.prototype.getItemFromData.call( this, data );
+       };
+
        /**
         * Validates the values in `this.searchType`.
         *