From a37272d4e5c33dbc7ee8f91829c2cc900097997e Mon Sep 17 00:00:00 2001
From: Eston Bond <eston@github.com>
Date: Wed, 10 Nov 2010 15:00:08 -0800
Subject: [PATCH] Select revision ranges instead of individual revisions

---
 .../frontend/public/javascript/gollum.js      | 91 +++++++++++++++++--
 1 file changed, 84 insertions(+), 7 deletions(-)

diff --git a/lib/gollum/frontend/public/javascript/gollum.js b/lib/gollum/frontend/public/javascript/gollum.js
index e4321ce4..20f6ad06 100644
--- a/lib/gollum/frontend/public/javascript/gollum.js
+++ b/lib/gollum/frontend/public/javascript/gollum.js
@@ -25,7 +25,6 @@ $(document).ready(function() {
   }
   
   if ($('#wiki-wrapper').hasClass('history')) {
-    $('#wiki-history td.checkbox input').each(highlightChecked);
     $('#wiki-history td.checkbox input').click(highlightChecked);
   
     $('#wiki-history td.revert-action a').mouseenter(highlightOn);
@@ -34,6 +33,88 @@ $(document).ready(function() {
   
 });
 
+var nodeSelector = {
+  
+  node1: null,
+  node2: null,
+  
+  selectNodeRange: function( n1, n2 ) {
+    if ( nodeSelector.node1 && nodeSelector.node2 ) {
+      $('#wiki-history td.selected').removeClass('selected');
+      nodeSelector.node1.addClass('selected');
+      nodeSelector.node2.addClass('selected');
+      
+      // swap the nodes around if they went in reverse
+      if ( nodeSelector.nodeComesAfter( nodeSelector.node1, 
+                                        nodeSelector.node2 ) ) {
+        var n = nodeSelector.node1;
+        nodeSelector.node1 = nodeSelector.node2;
+        nodeSelector.node2 = n;
+      }
+      
+      var s = true;
+      var $nextNode = nodeSelector.node1.next();
+      while ( $nextNode ) {
+        $nextNode.addClass('selected');
+        if ( $nextNode[0] == nodeSelector.node2[0] ) {
+          break;
+        }
+        $nextNode = $nextNode.next();
+      }
+    }
+  },
+  
+  nodeComesAfter: function ( n1, n2 ) {
+    var s = false;
+    $(n1).prevAll().each(function() {
+      if ( $(this)[0] == $(n2)[0] ) {
+        s = true;
+      }
+    });
+    return s;
+  },
+  
+  checkNode: function( nodeCheckbox ) {
+    var $nodeCheckbox = nodeCheckbox;
+    var $node = $(nodeCheckbox).parent().parent();
+    // if we're unchecking
+     if ( !$nodeCheckbox.is(':checked') ) {
+    
+       // remove the range, since we're breaking it
+       $('#wiki-history tr.selected').each(function() {
+         if ( $(this).find('td.checkbox input').is(':checked') ) {
+           return;
+         }
+         $(this).removeClass('selected');
+       });
+       
+       // no longer track this
+       if ( $node[0] == nodeSelector.node1[0] ) {
+         nodeSelector.node1 = null;
+         if ( nodeSelector.node2 ) {
+           nodeSelector.node1 = nodeSelector.node2;
+           nodeSelector.node2 = null;
+         }
+       } else if ( $node[0] == nodeSelector.node2[0] ) {
+         nodeSelector.node2 = null;
+       }
+       
+     } else {
+       // not checked, get a range set up
+       $node.addClass('selected');
+       if ( !nodeSelector.node1 ) {
+         nodeSelector.node1 = $node;
+       } else if ( !nodeSelector.node2 ) {
+         // okay, we don't have a node 2 but have a node1
+         nodeSelector.node2 = $node;
+         nodeSelector.selectNodeRange( nodeSelector.node1, 
+                                       nodeSelector.node2 );
+       }
+     }
+  }
+  
+};
+
 function highlightOn() {
   $(this).parent().parent().animate({
                                       backgroundColor: '#ffffea',
@@ -53,9 +134,5 @@ function highlightOff() {
 }
 
 function highlightChecked() {
- if ($(this).is(':checked')) {
-    $(this).parent().parent().addClass('selected');
-  } else {
-    $(this).parent().parent().removeClass('selected');
- }
-}
\ No newline at end of file
+ nodeSelector.checkNode($(this));
+}