From mail at chaitanyagupta.com  Wed Nov 14 19:01:10 2007
From: mail at chaitanyagupta.com (Chaitanya Gupta)
Date: Thu, 15 Nov 2007 00:31:10 +0530
Subject: [html-template-devel] Is this behaviour for SKIP-LEADING-WHITESPACE
	correct?
Message-ID: <fhfgl5$6fp$1@ger.gmane.org>

Hello,

I have come across a situation where SKIP-LEADING-WHITESPACE
(HTML-TEMPLATE's internal function) throws an error while trying to
create a template printer. I have narrowed it down to the following -

CL-USER> (let ((html-template:*ignore-empty-lines* t))
           (html-template::skip-leading-whitespace
            (make-array 4 :element-type 'character :fill-pointer 0)))


This throws an error. Here's the debugger output -

Index(s) to array function is/are out of the range of the array.
   [Condition of type TYPE-ERROR]

Restarts:
  0: [ABORT-REQUEST] Abort handling SLIME request.
  1: [ABORT] Abort entirely from this (lisp) process.

Backtrace:
  0: (SWANK::DEBUG-IN-EMACS #<TYPE-ERROR @ #x1143b6d2>)
  1: (SWANK:SWANK-DEBUGGER-HOOK #<TYPE-ERROR @ #x1143b6d2> #<Function
SWANK-DEBUGGER-HOOK>)
  2: (ERROR TYPE-ERROR :DATUM NIL :EXPECTED-TYPE FIXNUM :FORMAT-CONTROL
"Index(s) to array function is/are out of the range of the array."
:FORMAT-ARGUMENTS (NIL))
  3: (HTML-TEMPLATE::SKIP-LEADING-WHITESPACE "")
  4: (LET ((HTML-TEMPLATE:*IGNORE-EMPTY-LINES* T))
(HTML-TEMPLATE::SKIP-LEADING-WHITESPACE (MAKE-ARRAY 4 :ELEMENT-TYPE
(QUOTE CHARACTER) :FILL-POINTER 0)))
  5: (EVAL (LET ((HTML-TEMPLATE:*IGNORE-EMPTY-LINES* T))
(HTML-TEMPLATE::SKIP-LEADING-WHITESPACE (MAKE-ARRAY 4 :ELEMENT-TYPE #
:FILL-POINTER 0))))
  6: (SWANK::EVAL-REGION "(let ((html-template:*ignore-empty-lines* t))
           (html-template::skip-leading-whitespace
            (make-array 4 :element-type 'character :fill-pointer 0)))
" T)
...
[snipped remaining frames]

Is the above behaviour for SKIP-LEADING-WHITESPACE correct?

Thanks,

Chaitanya



From edi at agharta.de  Fri Nov 16 21:12:18 2007
From: edi at agharta.de (Edi Weitz)
Date: Fri, 16 Nov 2007 22:12:18 +0100
Subject: [html-template-devel] New release 0.9.1 (Re: Is this behaviour for
 SKIP-LEADING-WHITESPACE correct?)
In-Reply-To: <fhfgl5$6fp$1@ger.gmane.org> (Chaitanya Gupta's message of
	"Thu, 15 Nov 2007 00:31:10 +0530")
References: <fhfgl5$6fp$1@ger.gmane.org>
Message-ID: <u3av5c2tp.fsf@agharta.de>

On Thu, 15 Nov 2007 00:31:10 +0530, Chaitanya Gupta <mail at chaitanyagupta.com> wrote:

> I have come across a situation where SKIP-LEADING-WHITESPACE
> (HTML-TEMPLATE's internal function) throws an error while trying to
> create a template printer. I have narrowed it down to the following
> [...]

Yes, that looks like a bug.  Should be fixed in the new release.

Thanks for the report,
Edi.


From sohail at taggedtype.net  Wed Nov 21 06:43:24 2007
From: sohail at taggedtype.net (Sohail Somani)
Date: Wed, 21 Nov 2007 06:43:24 +0000 (UTC)
Subject: [html-template-devel] Easier way to fill tmpl_var environment?
Message-ID: <fi0k2c$jjp$9@ger.gmane.org>

Hi,

First of all, thank you for a nice library.

Now, I have a question. Is there a way to have html-template call back 
into the calling environment so I don't have to pass all slot values of a 
list of objects in as a list?

So instead of:

;;; prints "b c"
(fill-and-print-template "<!-- tmpl_loop ... -->" 
   (list :a (list :b "b" :c "c")))

I can do something like:

;;; prints "b c"
(fill-and-print-template 
  "<!-- tmpl_callback (b-of a) --> <!-- tmpl_callback (c-of a) -->"
  (list :a a))

Where b-of and c-of are readers. It is just very very tedious to make 
lists of all the values.

Does that make any sense?

Thanks for your time.

-- 
Sohail Somani
http://uint32t.blogspot.com



From edi at agharta.de  Thu Nov 22 17:30:44 2007
From: edi at agharta.de (Edi Weitz)
Date: Thu, 22 Nov 2007 18:30:44 +0100
Subject: [html-template-devel] Easier way to fill tmpl_var environment?
In-Reply-To: <fi0k2c$jjp$9@ger.gmane.org> (Sohail Somani's message of "Wed,
	21 Nov 2007 06:43:24 +0000 (UTC)")
References: <fi0k2c$jjp$9@ger.gmane.org>
Message-ID: <u63zutcfv.fsf@agharta.de>

On Wed, 21 Nov 2007 06:43:24 +0000 (UTC), Sohail Somani <sohail at taggedtype.net> wrote:

> First of all, thank you for a nice library.

You're welcome... :)

> Now, I have a question. Is there a way to have html-template call
> back into the calling environment so I don't have to pass all slot
> values of a list of objects in as a list?
>
> So instead of:
>
> ;;; prints "b c"
> (fill-and-print-template "<!-- tmpl_loop ... -->" 
>    (list :a (list :b "b" :c "c")))
>
> I can do something like:
>
> ;;; prints "b c"
> (fill-and-print-template 
>   "<!-- tmpl_callback (b-of a) --> <!-- tmpl_callback (c-of a) -->"
>   (list :a a))
>
> Where b-of and c-of are readers. It is just very very tedious to make 
> lists of all the values.
>
> Does that make any sense?

Not for me.  The design goal of HTML-TEMPLATE is to be as simple as
possible - the idea is that the people working on the HTML don't have
to learn yet another programming language.

I don't understand why you can't achieve what you want within Lisp,
something like

  (fill-and-print-template "<!-- tmpl_loop ... -->" 
    (my-function a))

where MY-FUNCTION builds and returns the structure you need.

Edi.


From sohail at taggedtype.net  Thu Nov 22 17:44:43 2007
From: sohail at taggedtype.net (Sohail Somani)
Date: Thu, 22 Nov 2007 17:44:43 +0000 (UTC)
Subject: [html-template-devel] Re: Easier way to fill tmpl_var environment?
References: <fi0k2c$jjp$9@ger.gmane.org> <u63zutcfv.fsf@agharta.de>
Message-ID: <fi4f6a$t41$1@ger.gmane.org>

On Thu, 22 Nov 2007 18:30:44 +0100, Edi Weitz wrote:

> Not for me.  The design goal of HTML-TEMPLATE is to be as simple as
> possible - the idea is that the people working on the HTML don't have to
> learn yet another programming language.
> 
> I don't understand why you can't achieve what you want within Lisp,
> something like
> 
>   (fill-and-print-template "<!-- tmpl_loop ... -->"
>     (my-function a))
> 
> where MY-FUNCTION builds and returns the structure you need.

Yes, you are right. That is what I ended up doing anyway. I have this 
nagging feeling that my-function should be generated somehow.

-- 
Sohail Somani
http://uint32t.blogspot.com