[2010-05-04] Consistently use ShortcodeParser in Text/HTMLText value getters (breaking [sitetreelink_id] in SiteTree.Content) about silverstripe-framework

[tractorcow]

This issue hasn't been touched for about 2 years but I'd like to elevate this as a bug impacting 3.1. At the very least, HTMLText should override any method that doesn't respect shortcodes with an appropriate replacement.

With the recent work on updating the blog module we should look at improving framework's support for these methods.

[tractorcow]

Will try to address in #5653

[dhensby]

Context: At the moment the shortcodes are parsed only on HTMLText objects so a plain text object cannot have shortcodes parsed. HTMLText parses the shortcodes in the forTemplate method so it happens at the last possible moment (just before being output in the template) rather than when the value is set or get. Each have their advantages and pitfalls.

What is certain is that the shortcodes need to be parsed before any content-type encoding or other manipulation of the value is done.

I think adding the parser to thesetValue method makes instantiation of a HTMLText object too expensive, putting it on the getValue is inefficient (multiple runs) or too fragile to cache.

For now, it looks like @tractorcow's suggestion of overriding each of the functions (XML, Summary, etc) and having them parse the codes FIRST and then escape is best.

[tractorcow]

Fixed with #5653 :D