diff options
Diffstat (limited to 'actionpack/lib')
-rw-r--r-- | actionpack/lib/action_view/helpers/javascript_helper.rb | 77 |
1 files changed, 71 insertions, 6 deletions
diff --git a/actionpack/lib/action_view/helpers/javascript_helper.rb b/actionpack/lib/action_view/helpers/javascript_helper.rb index 023d67fd48..5d87c85647 100644 --- a/actionpack/lib/action_view/helpers/javascript_helper.rb +++ b/actionpack/lib/action_view/helpers/javascript_helper.rb @@ -24,6 +24,23 @@ module ActionView # Examples: # link_to_remote "Delete this post", :update => "posts", :url => { :action => "destroy", :id => post.id } # link_to_remote(image_tag("refresh"), :update => "emails", :url => { :action => "list_emails" }) + # + # Asynchronous requests may be made by specifying a callback function + # to invoke when the request finishes. + # + # Example: + # link_to_remote word, + # :url => { :action => "undo", :n => word_counter }, + # :before => "if(!prepareForUndo()) return false", + # :complete => "undoRequestCompleted(request)" + # + # The complete list of callbacks that may be specified are: + # + # * uninitialized + # * loading + # * loaded + # * interactive + # * complete def link_to_remote(name, options = {}, html_options = {}) link_to_function(name, remote_function(options), html_options) end @@ -64,21 +81,47 @@ module ActionView var container = o(arguments[0]); var url = arguments[1]; var parameters = arguments[2]; - - container.innerHTML = xml_request(url, parameters); + var async = arguments[3]; + + if (async) { + xml_request(url, parameters, true, + { complete: function(request) { + container.innerHTML = request.responseText } + }) + } else { + container.innerHTML = xml_request(url, parameters); + } } function xml_request() { var url = arguments[0]; var parameters = arguments[1]; var async = arguments[2]; + var callbacks = arguments[3]; var type = parameters ? "POST" : "GET"; req = xml_http_request_object(); req.open(type, url, async); + + if (async) { + invoke_callback = function(which) { + if(callbacks && callbacks[which]) callbacks[which](req) + } + + req.onreadystatechange = function() { + switch(req.readyState) { + case 0: invoke_callback('uninitialized'); break + case 1: invoke_callback('loading'); break + case 2: invoke_callback('loaded'); break + case 3: invoke_callback('interactive'); break + case 4: invoke_callback('complete'); break + } + } + } + req.send(parameters ? parameters + "&_=" : parameters); - return req.responseText; + if(!async) return req.responseText; } function xml_http_request_object() { @@ -182,10 +225,32 @@ module ActionView end private + def build_callbacks(options) + callbacks = nil + %w{uninitialized loading loaded interactive complete}.each do |cb| + cb = cb.to_sym + if options[cb] + callbacks ? callbacks << "," : callbacks = "{" + callbacks << + "#{cb}:function(request){#{options[cb].gsub(/"/){'\"'}}}" + end + end + callbacks << "}" if callbacks + callbacks + end + def remote_function(options) + callbacks = build_callbacks(options) + function = options[:update] ? - "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]})" + "update_with_response('#{options[:update]}', " : + "xml_request(" + + function << "'#{url_for(options[:url])}'" + function << ', Form.serialize(this)' if options[:form] + function << ', nil' if !options[:form] && callbacks + function << ", true, " << callbacks if callbacks + function << ')' function = "#{options[:before]}; #{function}" if options[:before] function = "#{function}; #{options[:after]}" if options[:after] @@ -195,4 +260,4 @@ module ActionView end end end -end
\ No newline at end of file +end |