From 1e24600e724fc1971d85a1734528b14444f58895 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sun, 13 Mar 2005 16:35:15 +0000
Subject: Added Field.present, .focus, and .clear as JS convenience for working
 with forms. Removed link_to_display_toggle in favor of link_to_function
 "Cancel", "toggle_display("add_item_link", "add_item_form")"

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@895 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 .../lib/action_view/helpers/javascript_helper.rb   | 27 +++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

(limited to 'actionpack')

diff --git a/actionpack/lib/action_view/helpers/javascript_helper.rb b/actionpack/lib/action_view/helpers/javascript_helper.rb
index 83538490ee..05dd8b6bb3 100644
--- a/actionpack/lib/action_view/helpers/javascript_helper.rb
+++ b/actionpack/lib/action_view/helpers/javascript_helper.rb
@@ -55,6 +55,24 @@ module ActionView
       def define_javascript_functions
     <<-EOF
     <script language="JavaScript">
+    /* Convenience form methods */
+    Field = {
+      clear: function() {
+        for(i = 0; i < arguments.length; i++) { o(arguments[i]).value = ''; }
+        return true;
+      },
+
+      focus: function(id) {
+        o(id).focus();
+        return true;
+      },
+      
+      present: function() {
+        for(i = 0; i < arguments.length; i++) { if (o(arguments[i]).value = '') { return false; } }
+        return true;
+      }
+    }
+    
     /* XMLHttpRequest Methods */
 
     function update_with_response() {
@@ -104,6 +122,12 @@ module ActionView
       o(id).style.display = (o(id).style.display == "none") ? "" : "none";
     }
 
+    function toggle_display() {
+      for(i = 0; i < arguments.length; i++) {
+        o(arguments[i]).style.display = (o(arguments[i]).style.display == "none") ? "" : "none";
+      }
+    }
+
     function o(id) {
       return document.getElementById(id);
     }
@@ -178,7 +202,8 @@ module ActionView
             "update_with_response('#{options[:update]}', '#{url_for(options[:url])}'#{', Form.serialize(this)' if options[:form]})" :
             "xml_request('#{url_for(options[:url])}'#{', Form.serialize(this)' if options[:form]})"
 
-          function = [ options[:before], function, options[:before] ].join("; ")
+          function = "#{options[:before]}; #{function}" if options[:before]
+          function = "#{function}; #{options[:after]}"  if options[:after]
           function = "if (#{options[:condition]}) { #{function}; }" if options[:condition]
       
           return function
-- 
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