caveatPatchor.js

## caveatPatchor.js
/**
  Sample Propane caveatPatchor.js file based on tmm1's avatar hack.

  You'll need at least version 1.1.1 to experiment with this:
  http://propaneapp.com/appcast/Propane.1.1.1.zip

  Once I'm sure exposing this hack-injection point doesn't cause problems
  I'll do an official auto-updating version.

  As of version 1.1.1, Propane will load and execute the contents of
  ~Library/Application Support/Propane/unsupported/caveatPatchor.js
  immediately following the execution of its own enhancer.js file.

  Please don't tinker with enhancer.js - it's the glue that binds Campfire's
  javascript to Propane's UI and features.

  Also: this is totally and utterly unsupported. By all means you can
  ask me questions via Propane's help forums but I can't debug your scripts
  for you. My javascript isn't that good, trust me.

  Finally, if Propane is acting broken in general and you've got hacks in
  caveatPatchor.js, *please* tell me about your hacks up-front when opening
  an issue on the support site.
*/

var displayAvatars = true;

if (displayAvatars) {

  Object.extend(Campfire.Message.prototype, {
    addAvatar: function() {
      if (this.actsLikeTextMessage()) {
        var author = this.authorElement();

        if (author.visible()) {
          author.hide()

          if (this.bodyCell.select('strong').length == 0) {
            this.bodyCell.insert({top: '<strong>'+this.author()+'</strong><br>'})
            author.insert({after: '<img alt="'+this.author()+'" width="32" height="32" align="top" style="margin-left: 5px; border-radius:3px" src="'+author.getAttribute('data-avatar')+'">'});
          }
        }
      }
    },
  });

  /* if you can wrap rather than rewrite, use swizzle like this: */
  swizzle(Campfire.Message, {
    setAuthorVisibilityInRelationTo: function($super, message) {
      $super(message)
      this.addAvatar();
    },
  });


  /* defining a new responder is probably the best way to insulate your hacks from Campfire and Propane */
  Campfire.AvatarMangler = Class.create({
    initialize: function(chat) {
      this.chat = chat;

      chat.transcript.element.childElements().each(function(elem){
        if (elem.match('tr')) {
          var msg = new Campfire.Message(chat, elem)
          msg.addAvatar()
        }
      })

      this.chat.layoutmanager.layout();
      this.chat.windowmanager.scrollToBottom();
    },
    onMessagesInserted: function(messages) {
      var scrolledToBottom = this.chat.windowmanager.isScrolledToBottom();

      for (var i = 0; i < messages.length; i++) {
        var message = messages[i];
        message.addAvatar();
      }

      if (scrolledToBottom)
        this.chat.windowmanager.scrollToBottom();
    },
  });

  /* Here is how to install your responder into the running chat */
  Campfire.Responders.push("AvatarMangler");
  window.chat.installPropaneResponder("AvatarMangler", "avatarmangler");
}