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From "Leonardo Uribe (JIRA)" <...@myfaces.apache.org>
Subject [jira] Commented: (TOMAHAWK-1504) Update autoscroll feature to JSF 2
Date Fri, 14 May 2010 22:12:42 GMT

    [ https://issues.apache.org/jira/browse/TOMAHAWK-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867700#action_12867700
] 

Leonardo Uribe commented on TOMAHAWK-1504:
------------------------------------------

I updated the name of the tag. now is t:autoScroll instead t:autoscroll, because it seems
to be the original name (the hidden field has its name as "autoScroll")

> Update autoscroll feature to JSF 2
> ----------------------------------
>
>                 Key: TOMAHAWK-1504
>                 URL: https://issues.apache.org/jira/browse/TOMAHAWK-1504
>             Project: MyFaces Tomahawk
>          Issue Type: Improvement
>          Components: JSF2
>    Affects Versions: 1.1.9
>            Reporter: Leonardo Uribe
>            Assignee: Leonardo Uribe
>             Fix For: 1.1.10-SNAPSHOT
>
>         Attachments: TOMAHAWK-1504-1.patch
>
>
> In jsf 1.1. and 1.2, autoscroll behavior had the following problems:
> - It is myfaces specific feature, because requires add some code on renderers. In ri
it will not work
> - It only works for h:commandXXX and t:commandXXX components, so if you use trinidad
(override h:commandXXX renderers) it will not work.
> - Since it requires render some javascript at the end of <body> tag, it requires
use DefaultAddResource or <t:documentBody>
> With jsf 2.0 we have the chance to get rid all this problems and make this feature work
with other libraries.
> First a short review about this feature. To make it work, it requires the following points:
> - Render an <input type="hidden" name="autoScroll" /> that will contain the position
on the page (x,y)
> - Render a function called getScrolling() ant the end of the page that calculate the
value and optionally render the command that scroll.
> - Render the script on each link to call getScrolling() function and assign its value
to the hidden field (using oamSetHiddenInput).
> The idea include add the following code:
> - Create a new client behavior tag called t:autoscroll that adds the script required
on each "command" component.
> - Create a new component that just render the hidden field. It will be added as a component
resource.
> - Create a new component that render autoScroll script. It will be added as a component
resource.
> - Add some code on ResourceViewHandler, to add the two previous components to the component
tree as transient each time the view is rendered, but only if org.apache.myfaces.AUTO_SCROLL
web param is true or t:autoscroll is used on the current page.
> Now, the proposal will work in following scenarios like this:
> - org.apache.myfaces.AUTO_SCROLL is enabled, myfaces core is used, so all h:commandXXX
and t:commandXXX works like in jsf 1.1 and jsf 1.2.
> - org.apache.myfaces.AUTO_SCROLL is disabled and myfaces core is used, hidden field and
script will be added only if t:autoscroll is used. By default, h:commandXXX and t:commandXXX
will not have autoscroll script, so t:autoscroll is required to add this script.
> - RI (Mojarra) is used, hidden field and script will be added only if t:autoscroll is
used. By default, h:commandXXX and t:commandXXX will not have autoscroll script, so t:autoscroll
is required to add this script.

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