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<title>[24579] trunk/wp-admin/js/revisions.js: Revisions improvements</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/24579">24579</a></dd>
<dt>Author</dt> <dd>ocean90</dd>
<dt>Date</dt> <dd>2013-07-06 20:22:02 +0000 (Sat, 06 Jul 2013)</dd>
</dl>

<h3>Log Message</h3>
<pre>Revisions improvements

* Enable smooth sliding in Compare two mode

props adamsilverstein. see <a href="http://core.trac.wordpress.org/ticket/24425">#24425</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpadminjsrevisionsjs">trunk/wp-admin/js/revisions.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkwpadminjsrevisionsjs"></a>
<div class="modfile"><h4>Modified: trunk/wp-admin/js/revisions.js (24578 => 24579)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-admin/js/revisions.js   2013-07-06 10:48:14 UTC (rev 24578)
+++ trunk/wp-admin/js/revisions.js      2013-07-06 20:22:02 UTC (rev 24579)
</span><span class="lines">@@ -236,6 +236,8 @@
</span><span class="cx"> 
</span><span class="cx">                  this.listenTo( this.model, 'change:diffId', this.updateDiff );
</span><span class="cx"> 
</span><ins>+                       this.listenTo( this.model, 'change:compareTwoMode', this.updateCompareTwoMode );
+
</ins><span class="cx">                   this.views.set( '.revisions-control-frame', new revisions.view.Controls({
</span><span class="cx">                          model: this.model
</span><span class="cx">                  }) );
</span><span class="lines">@@ -275,6 +277,10 @@
</span><span class="cx">                          }));
</span><span class="cx">                          this.model.trigger( 'renderDiff' );
</span><span class="cx">                  });
</span><ins>+               },
+
+               updateCompareTwoMode: function() {
+                       this.$el.toggleClass( 'comparing-two-revisions' );
</ins><span class="cx">           }
</span><span class="cx">  });
</span><span class="cx"> 
</span><span class="lines">@@ -336,11 +342,8 @@
</span><span class="cx"> 
</span><span class="cx">          updateMeta: function() {
</span><span class="cx">                  this.$el.html( this.template( this.model.toJSON() ) );
</span><del>-                       if( this.model.get( 'to' ).attributes.current ) {
-                               $( '#restore-revision' ).prop( 'disabled', true );
-                       } else {
-                               $( '#restore-revision' ).prop( 'disabled', false );
-                       }
</del><ins>+
+                       $( '#restore-revision' ).prop( 'disabled', this.model.get( 'to' ).attributes.current );
</ins><span class="cx">           }
</span><span class="cx">  });
</span><span class="cx"> 
</span><span class="lines">@@ -375,11 +378,7 @@
</span><span class="cx">          // Toggle the compare two mode feature when the compare two checkbox is checked.
</span><span class="cx">          compareTwoToggle: function( event ) {
</span><span class="cx">                  // Activate compare two mode?
</span><del>-                       if ( $( '.compare-two-revisions' ).is( ':checked' ) ) {
-                               this.model.set( { compareTwoMode: true } );
-                       } else {
-                               this.model.set( { compareTwoMode: false } );
-                       }
</del><ins>+                        this.model.set( { compareTwoMode: $( '.compare-two-revisions' ).prop( 'checked' ) } );
</ins><span class="cx"> 
</span><span class="cx">                  // Update route
</span><span class="cx">                  this.model.revisionsRouter.navigateRoute( this.model.get( 'to').id, this.model.get( 'from' ).id );
</span><span class="lines">@@ -545,9 +544,7 @@
</span><span class="cx"> 
</span><span class="cx">                  // And update the slider in case the route has set it.
</span><span class="cx">                  this.updateSliderSettings();
</span><del>-
</del><span class="cx">                   this.slide( '', this.settings.attributes );
</span><del>-
</del><span class="cx">                   this.$el.slider( this.settings.toJSON() );
</span><span class="cx"> 
</span><span class="cx">                  // Listen for changes in Compare Two Mode setting
</span><span class="lines">@@ -568,7 +565,7 @@
</span><span class="cx">                          actualX = e.clientX - sliderLeft,
</span><span class="cx">                          hoveringAt = Math.floor( actualX / tickWidth );
</span><span class="cx"> 
</span><del>-                       // Reverse direction in Rtl mode.
</del><ins>+                        // Reverse direction in RTL mode.
</ins><span class="cx">                   if ( isRtl )
</span><span class="cx">                          hoveringAt = this.model.revisions.length - hoveringAt - 1;
</span><span class="cx"> 
</span><span class="lines">@@ -606,7 +603,7 @@
</span><span class="cx">                                          rightValue = leftValue + 1;
</span><span class="cx">                                  }
</span><span class="cx">                          } else {
</span><del>-                                       leftValue  = isRtl ?    this.model.revisions.length -  this.model.revisions.indexOf( this.model.get( 'to' ) ) - 1 :
</del><ins>+                                        leftValue = isRtl ?     this.model.revisions.length - this.model.revisions.indexOf( this.model.get( 'to' ) ) - 1 :
</ins><span class="cx">                                                                                   this.model.revisions.indexOf( this.model.get( 'from' ) ),
</span><span class="cx">                                  rightValue = isRtl ?    this.model.revisions.length - this.model.revisions.indexOf( this.model.get( 'from' ) ) - 1 :
</span><span class="cx">                                                                                  this.model.revisions.indexOf( this.model.get( 'to' ) );
</span><span class="lines">@@ -631,9 +628,8 @@
</span><span class="cx">                                  range: false
</span><span class="cx">                          } );
</span><span class="cx">                  }
</span><ins>+
</ins><span class="cx">                   if ( this.model.get( 'compareTwoMode' ) ){
</span><del>-                               $( '.revisions' ).addClass( 'comparing-two-revisions' );
-
</del><span class="cx">                           // in RTL mode the 'left handle' is the second in the slider, 'right' is first
</span><span class="cx">                          $( 'a.ui-slider-handle', this.$el )
</span><span class="cx">                                  .first()
</span><span class="lines">@@ -643,8 +639,6 @@
</span><span class="cx">                                  .last()
</span><span class="cx">                                  .addClass( isRtl ? 'left-handle' : 'right-handle' )
</span><span class="cx">                                  .removeClass( isRtl ? 'right-handle' : 'left-handle' );
</span><del>-                       } else {
-                               $( '.revisions' ).removeClass( 'comparing-two-revisions' );
</del><span class="cx">                   }
</span><span class="cx">          },
</span><span class="cx"> 
</span><span class="lines">@@ -665,23 +659,53 @@
</span><span class="cx">          },
</span><span class="cx"> 
</span><span class="cx">          start: function( event, ui ) {
</span><del>-                       if ( this.model.get( 'compareTwoMode' ) )
-                               return;
-
</del><span class="cx">                   // Track the mouse position to enable smooth dragging,
</span><del>-                       // overrides default jQuery UI step behaviour.
-                       $( window ).on( 'mousemove', { slider: this }, function( e ) {
-                               var slider = e.data.slider,
-                                       sliderLeft = slider.$el.offset().left,
-                                       sliderRight = sliderLeft + slider.$el.width();
</del><ins>+                        // overrides default jQuery UI step behavior.
+                       $( window ).on( 'mousemove', { view: this }, function( e ) {
+                               var view              = e.data.view,
+                                       leftDragBoundary  = view.$el.offset().left, // Initial left boundary
+                                       sliderOffset      = leftDragBoundary,
+                                       sliderRightEdge   = leftDragBoundary + view.$el.width(),
+                                       rightDragBoundary = sliderRightEdge, // Initial right boundary
+                                       leftDragReset     = 0, // Initial left drag reset
+                                       rightDragReset    = sliderRightEdge - sliderOffset; // Initial right drag reset
</ins><span class="cx"> 
</span><ins>+                               // In two handle mode, ensure handles can't be dragged past each other.
+                               // Adjust left/right boundaries and reset points.
+                               if ( view.model.get( 'compareTwoMode' ) ) {
+                                       var rightHandle = $( ui.handle ).parent().find( '.right-handle' ),
+                                               leftHandle  = $( ui.handle ).parent().find( '.left-handle' );
+
+                                       if ( $( ui.handle ).hasClass( 'left-handle' ) ) {
+                                               // Dragging the left handle, boundary is right handle.
+                                               // RTL mode calculations reverse directions.
+                                               if ( isRtl ) {
+                                                       leftDragBoundary = rightHandle.offset().left + rightHandle.width();
+                                                       leftDragReset    = leftDragBoundary - sliderOffset;
+                                               } else {
+                                                       rightDragBoundary = rightHandle.offset().left;
+                                                       rightDragReset    = rightDragBoundary - sliderOffset;
+                                               }
+                                       } else {
+                                               // Dragging the right handle, boundary is the left handle.
+                                               // RTL mode calculations reverse directions.
+                                               if ( isRtl ) {
+                                                       rightDragBoundary = leftHandle.offset().left;
+                                                       rightDragReset    = rightDragBoundary - sliderOffset;
+                                               } else {
+                                                       leftDragBoundary = leftHandle.offset().left + leftHandle.width() ;
+                                                       leftDragReset    = leftDragBoundary - sliderOffset;
+                                               }
+                                       }
+                               }
+
</ins><span class="cx">                           // Follow mouse movements, as long as handle remains inside slider.
</span><del>-                               if ( e.clientX < sliderLeft ) {
-                                       $( ui.handle ).css( 'left', 0 ); // Mouse to left of slider.
-                               } else if ( e.clientX > sliderRight ) {
-                                       $( ui.handle ).css( 'left', sliderRight - sliderLeft); // Mouse to right of slider.
</del><ins>+                                if ( e.clientX < leftDragBoundary ) {
+                                       $( ui.handle ).css( 'left', leftDragReset ); // Mouse to left of slider.
+                               } else if ( e.clientX > rightDragBoundary ) {
+                                       $( ui.handle ).css( 'left', rightDragReset ); // Mouse to right of slider.
</ins><span class="cx">                           } else {
</span><del>-                                       $( ui.handle ).css( 'left', e.clientX - sliderLeft ); // Mouse in slider.
</del><ins>+                                        $( ui.handle ).css( 'left', e.clientX - sliderOffset ); // Mouse in slider.
</ins><span class="cx">                           }
</span><span class="cx">                  } );
</span><span class="cx">          },
</span><span class="lines">@@ -716,9 +740,6 @@
</span><span class="cx">          },
</span><span class="cx"> 
</span><span class="cx">          stop: function( event, ui ) {
</span><del>-                       if ( this.model.get( 'compareTwoMode' ) )
-                               return;
-
</del><span class="cx">                   $( window ).off( 'mousemove' );
</span><span class="cx"> 
</span><span class="cx">                  // Reset settings props handle back to the step position.
</span></span></pre>
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