[TYPO3-core] RFC: Feature #7531: TCA displayCond - allow ANDed and/or ORed rulesets

[Ralf Hettinger]

This is an SVN patch request.

Type: New feature

Bugtracker references:
http://bugs.typo3.org/view.php?id=7531

Branches: trunk

Problem:
The TCA key displayCond currently allows only one condition rule. The
visibility of a TCEform-field therefore can't depend on more than one
condition.

Solution:
Introduce displayCond rulesets, which are arrays having keys AND and/or
OR and are pointing to arrays with elements being single displayCond
rules or again displayCond rulesets.

Cheers,
Ralf Hettinger
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