Michele Mariotti Michele Mariotti - 7 months ago 77
Javascript Question

MonkeyPatching: PrimeFaces widgets extend/override

I'm currently using (it's working fine)

PrimeFaces.widget.OverlayPanel.prototype._old_init = PrimeFaces.widget.OverlayPanel.prototype.init;
PrimeFaces.widget.OverlayPanel.prototype.init = function(cfg)
{
this._old_init(cfg);
this.align();
}


but I'd like to use something more readable and 'jQuery-ish' like this completely invented unrealistic code:

PrimeFaces.widget.OverlayPanel.patch(
{
init: function(cfg)
{
super.init(cfg);
this.align();
},

show: function()
{
console.log('blah blah blah');
super.show();
}
});


I tried
PrimeFaces.widget.Xxx.extend({...})
but in this case I have no access to
super
methods.

Please, keep in mind that I'm totally dumb with Javascript

Thanks

Answer

I've achieved it:

if(PrimeFaces.widget.OverlayPanel)
{
    PrimeFaces.widget.OverlayPanel = PrimeFaces.widget.OverlayPanel.extend(
    {
        init: function(cfg) 
        {
            this._super(cfg);
            this.align();
        },

        show: function()
        {
            console.log('blah blah blah');
            this._super();
        }
    });
};

this is stored inside

  • app
    • resources
      • js
        • pf-patches.js

and it's used in global template:

<!DOCTYPE html>
<html lang="#{userBean.locale.language}" xmlns="http://www.w3.org/1999/xhtml" 
    xmlns:ui="http://xmlns.jcp.org/jsf/facelets" xmlns:h="http://xmlns.jcp.org/jsf/html"
    xmlns:f="http://xmlns.jcp.org/jsf/core" xmlns:cc="http://xmlns.jcp.org/jsf/composite"
    xmlns:c="http://xmlns.jcp.org/jsp/jstl/core" xmlns:fn="http://xmlns.jcp.org/jsp/jstl/functions"
    xmlns:p="http://primefaces.org/ui" xmlns:pe="http://primefaces.org/ui/extensions"
    xmlns:o="http://omnifaces.org/ui" xmlns:of="http://omnifaces.org/functions"
    xmlns:s="http://shapeitalia.com/jsf2" xmlns:sc="http://xmlns.jcp.org/jsf/composite/shape"
    xmlns:e="http://java.sun.com/jsf/composite/cc" xmlns:et="http://shapeitalia.com/edea2"
    xmlns:pt="http://xmlns.jcp.org/jsf/passthrough">

<f:view locale="#{userBean.locale}" contentType="text/html">
    <h:head>
        <f:facet name="first">
            <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1" />
            <meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
            <title><ui:insert name="title">#{navigatorBean.viewTitle}</ui:insert></title>
            <link rel="shortcut icon" type="image/x-icon" href="#{resource['favicon/favicon.ico']}" />
        </f:facet>

        <f:facet name="last">
==========> <h:outputScript name="js/pf-patches.js" /> <==========
            <h:outputScript library="omnifaces" name="fixviewstate.js" />
        </f:facet>
    </h:head>

    <h:body>
        <h:outputStylesheet name="theme/custom.css" />
        <h:outputStylesheet name="theme/other-icons.css" />

        ...