Joomla by default renders its system messages (errors, notices etc.) in
libraries/joomla/document/html/renderer/message.php
.
For my own template, I would like to customize the way these messages are displayed. However it does not seem to be possible in the traditional way, using template overrides.
Is anyone here aware of a way to accomplish something like this?
For Joomla! 1.7 - 2.5
You need copy libraries/joomla/document/html/renderer/message.php
in to templates/YOUR_TEMPLATE/html/message.php
Then in index.php of YOUR_TEMPLATE you need to include the file (as it is not automatically included like other overrides):
// Message overwrite
require_once JPATH_ROOT .'/templates/'. $this->template .'/html/message.php';
Now you can safety overwrite the JDocumentRendererMessage::render()
function there ;)
For Joomla! 3.x
You just need make html/message.php file in YOUR_TEMPLATE. This file should contain function renderMessage(). Check the isis default template, as example.