Ticket #23899: 23899.3.patch

wp-admin/js/revisions.js

@@ -243 +243 @@
                         this.reloadRight();
                 },
 
+                disabledButtonCheck: function( val ) {
+                        var maxVal = this.revisions.length - 1,
+                                next = $( '#next' ),
+                                prev = $( '#previous' );
+
+                        // Disable "Next" button if you're on the last node
+                        if ( maxVal === val )
+                                next.prop( 'disabled', true );
+                        else
+                                next.prop( 'disabled', false );
+
+                        // Disable "Previous" button if you're on the 0 node
+                        if ( 0 === val )
+                                prev.prop( 'disabled', true );
+                        else
+                                prev.prop( 'disabled', false );
+                },
+
                 completeApplicationSetup: function() {
                         this.revisionView = new revisions.view.Diff({
                                 model: this.revisions
@@ -293 +311 @@
                         if ( this.singleRevision ) {
                                 Diff.rightDiff = ( ui.value + 1 );
                                 Diff.revisionView.render();
+                                Diff.disabledButtonCheck( ui.value );
                         } else {
                                 if ( ui.values[0] === ui.values[1] ) // prevent compare to self
                                         return false;
@@ -416 +435 @@
                         // Triggers the slide event
                         if ( slide )
                                 $( '#diff-slider' ).trigger( 'slide' );
+
+                        Diff.disabledButtonCheck( options.value );
                 },
 
                 option: function( key ) {

wp-admin/css/colors-fresh.css

@@ -1385 +1385 @@
 }
 
 .revision-tick.completed-true {
-        background-color: #aaa;
+        background-color: #d7d7d7;
 }
 
 .diff-label {

wp-admin/css/wp-admin.css

@@ -3628 +3628 @@
 
 #diff-slider-ticks {
         position: absolute;
-        z-index: 1;
+        z-index: 2;
         margin-top: 20px;
 }
 

wp-admin/css/colors-classic.css

@@ -1491 +1491 @@
 }
 
 .revision-tick.completed-true {
-        background-color: #aaa;
+        background-color: #d1e5ee;
 }
 
 .diff-label {