I want my templates to be as simple as possible.
They should not include any logic at all. So I never use php-modifier and I
would also like to avoid some kind of AND or OR logical operators (although
there are the smaller problem...).
But a template needs what I call state. The simplest example for me is the
odd-even problem:
ul
li tal:repeat=item items class=${what to do here, odd or even?} /
/ul
The state of the rendering for the li-tag depends on the current item. So
instead of writing php or some complex a ? B : c syntax, I just want to have
somebody (model) who decides what to do for the current li.
Of course you can write a modifier for this like
css-odd-or-even:repeat/item/odd. But I don't like modifiers the way they are
implemented now. That is for two reasons:
1. You have do define something global (function or static method I think?) to
let phptal find the modifier. You can't just register modifiers with the
phptal-object like you can do it with filters or resolvers for example.
2. Each modifier has to parse it's argument(s) on his own.
What I would like to have is an object, which I can call a method on and pass
arguments to.
So I would also say that you should strip the logical operators but implement a
way to pass arguments to a method of a variable within the phptal context:
$p = new PHPTAL('template.html');
$p-oddHelper = new OddHelper();
$p-items = array(1, 2, 3);
ul
li tal:repeat=item items class=${oddHelper(repeat/item/odd)} /
/ul
I think it would be much simpler to extend the current tal-syntax only to allow
parameters than to introduce logical operators. And it would keep the syntax
simpler.
Kind regards,
Per
-Ursprüngliche Nachricht-
Von: phptal-boun...@lists.motion-twin.com
[mailto:phptal-boun...@lists.motion-twin.com] Im Auftrag von Ivo Võsa
Gesendet: Montag, 4. Oktober 2010 11:54
An: Template Attribute Language for PHP
Betreff: Re: [PHPTAL] Re: AW: Logical operators in PHPTAL
Kornel Lesiński wrote:
On 1 Oct 2010, at 18:46, Moritz Baumann wrote:
I think the next step would be to work out syntax exactly:
http://phptal.org/wiki/doku.php/improvedtales
Hm, that page mentions a lot more than just logical operators. I
guess that’s what the negative feedback was about, not logical operators
inside tal:condition.
The main difference between PHPTAl and other template engines is that
the syntax is quite simple and that the templates look clean. IMHO,
function calls and an equivalent to the ?: operator would add
unnecessary complexity to PHPTAL and spoil exactly what makes PHPTAL
unique and great. Support for logical operators inside tal:condition,
on the other hand, would make the php: modifier more or less unnecessary.
I look at this differently: these are things I need, whether their syntax is
nice or not, so I'd prefer to make their syntax nicer.
Perhaps arguments to functions is a step too far (and authors should be
required to write expression modifiers for these), but setting of class name
based on condition is a very common pattern and ternary operator is an awful
way to do it.
i personaly would like to avoid php: as much as possible, so for setting
class name i use things like
function phptal_tales_iftrue($src, $nothrow) { $src = explode(',', trim($src));
return '(' . phptal_tales(trim($src[0]), $nothrow) . ' ? ' .
phptal_tales(trim($src[1]), $nothrow) . ' : null)'; }
li tal:repeat=item list class=${iftrue: repeat/item/end, 'last'}.../li
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