Is it possible to control maximum line length in html output?

Is it possible to control maximum line length in html output?

[Geoff Russell]

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I'm sending html files in emails and the MIME::Lite perl module doesn't 
like long lines (>1000 chars) ... not sure where
the problem is, but I get occassional added space in the middle of words 
when it breaks the lines up to MIME them.

I tried --columns=100 thinking it might split long html lines up, but that 
didn't seem to affect html output.  

Any ideas? 


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Re: Is it possible to control maximum line length in html output?

[Daniel Staal]

--As of June 21, 2015 6:40:02 PM -0700, Geoff Russell is alleged to have 
said:

> I'm sending html files in emails and the MIME::Lite perl module doesn't
> like long lines (>1000 chars) ... not sure where
> the problem is, but I get occassional added space in the middle of words
> when it breaks the lines up to MIME them.
>
>
> I tried --columns=100 thinking it might split long html lines up, but
> that didn't seem to affect html output.
>
>
> Any ideas?

--As for the rest, it is mine.

Since you're already using Perl, I have a quick one: Feed the text through 
Text::Wrap first.  A couple of extra lines in your script should fix the 
problem:

~~~

use Text::Wrap;

$Text::Wrap::columns = 100;
@wrapped_text = wrap('', '', @input_text);

~~~

(Above for example.  See docs for more info.)

Daniel T. Staal

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Re: Is it possible to control maximum line length in html output?

[Geoff Russell]

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On Monday, June 22, 2015 at 11:56:23 AM UTC+9:30, Daniel Staal wrote:
>
> [snip]
>
> --As for the rest, it is mine. 
>
> Since you're already using Perl, I have a quick one: Feed the text through 
> Text::Wrap first.  A couple of extra lines in your script should fix the 
> problem: 
>

Thank Daniel ... definitely worth investigating, but I'm a little worried 
that breaking at
word boundaries might break html tags in weird places. Perhaps I need to 
check html 
syntax details first.

Cheers,
Geoff
 

>
> ~~~ 
>
> use Text::Wrap; 
>
> $Text::Wrap::columns = 100; 
> @wrapped_text = wrap('', '', @input_text); 
>
> ~~~ 
>
> (Above for example.  See docs for more info.) 
>
> Daniel T. Staal 
>
> --------------------------------------------------------------- 
> This email copyright the author.  Unless otherwise noted, you 
> are expressly allowed to retransmit, quote, or otherwise use 
> the contents for non-commercial purposes.  This copyright will 
> expire 5 years after the author's death, or in 30 years, 
> whichever is longer, unless such a period is in excess of 
> local copyright law. 
> --------------------------------------------------------------- 
>

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Re: Is it possible to control maximum line length in html output?

[Daniel Staal]

--As of June 21, 2015 7:57:23 PM -0700, Geoff Russell is alleged to have 
said:

> Thank Daniel ... definitely worth investigating, but I'm a little worried
> that breaking at
> word boundaries might break html tags in weird places. Perhaps I need to
> check html
> syntax details first.

--As for the rest, it is mine.

A quick look at the code makes me think the relevant regex they are using 
to break words is `(?=\s)\X` - meaning 'any whitespace'.  (Well, the 
boundary of.)  So you should be safe: Whitespace is collapsed in HTML, so 
adding to it or changing it won't break anything.  (As long as it's not 
created, and it looks like Text::Wrap doesn't do that.)

It should also be possible to change that regex by setting 
`$Text::Wrap::break` to whatever you need - though as I said you shouldn't 
need to.

Daniel T. Staal

---------------------------------------------------------------
This email copyright the author.  Unless otherwise noted, you
are expressly allowed to retransmit, quote, or otherwise use
the contents for non-commercial purposes.  This copyright will
expire 5 years after the author's death, or in 30 years,
whichever is longer, unless such a period is in excess of
local copyright law.
---------------------------------------------------------------

Re: Is it possible to control maximum line length in html output?

[Geoff Russell]

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On Monday, June 22, 2015 at 2:05:19 PM UTC+9:30, Daniel Staal wrote:
>
> --As of June 21, 2015 7:57:23 PM -0700, Geoff Russell is alleged to have 
> said: 
>
> > Thank Daniel ... definitely worth investigating, but I'm a little 
> worried 
> > that breaking at 
> > word boundaries might break html tags in weird places. Perhaps I need to 
> > check html 
> > syntax details first. 
>
> --As for the rest, it is mine. 
>
> A quick look at the code makes me think the relevant regex they are using 
> to break words is `(?=\s)\X` - meaning 'any whitespace'.  (Well, the 
> boundary of.)  So you should be safe: Whitespace is collapsed in HTML, so 
> adding to it or changing it won't break anything.  (As long as it's not 
> created, and it looks like Text::Wrap doesn't do that.) 
>
> It should also be possible to change that regex by setting 
> `$Text::Wrap::break` to whatever you need - though as I said you shouldn't 
> need to. 
>

I "rolled my own" to just break the long lines and break on a space ... and 
it works fine. Thanks
for suggesting it.

Cheers,
Geoff


 

>
> Daniel T. Staal 
>
> --------------------------------------------------------------- 
> This email copyright the author.  Unless otherwise noted, you 
> are expressly allowed to retransmit, quote, or otherwise use 
> the contents for non-commercial purposes.  This copyright will 
> expire 5 years after the author's death, or in 30 years, 
> whichever is longer, unless such a period is in excess of 
> local copyright law. 
> --------------------------------------------------------------- 
>

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Re: Is it possible to control maximum line length in html output?

[BP Jonsson]

Den 2015-06-22 04:57, Geoff Russell skrev:
>
>
> On Monday, June 22, 2015 at 11:56:23 AM UTC+9:30, Daniel Staal wrote:
>>
>> [snip]
>>
>> --As for the rest, it is mine.
>>
>> Since you're already using Perl, I have a quick one: Feed the text through
>> Text::Wrap first.  A couple of extra lines in your script should fix the
>> problem:
>>
>
> Thank Daniel ... definitely worth investigating, but I'm a little worried
> that breaking at
> word boundaries might break html tags in weird places. Perhaps I need to
> check html
> syntax details first.

I would use HTML Tidy. There are some useful links on its WP
page: <https://en.wikipedia.org/wiki/HTML_Tidy>. If you are on
something Unixish it should be easy to install. In the Ubuntu
repo it's simply called "tidy". You will get a slightly old
version, but that shouldn't affect most normal use cases. It has
an option exactly for this, presumably designed not to break
anywhere harmful:

| --wrap
| Type: Integer
| Default: 68
| Example: 0 (no wrapping), 1, 2, ...
| This option specifies the right margin Tidy uses for line wrapping.
     Tidy tries to wrap lines so that they do not exceed this length.
     Set wrap to zero if you want to disable line wrapping.

If you are on something Unixish you should say
`man -H<browser> tidy`, where `<browser>` is the name of your
favorite web browser, and read its manual in the comfort of said
browser. Be careful with the --write-back option since there is
no backup option!

The Perl wrapper around HTML Tidy is less useful now, since it
needs you to build its own fork of tidylib,which never
succeeded for me. I have run it successfully with Capture::Tiny 
though.
A custom config file is most useful when doing that!

/bpj

Fwd: Re: Is it possible to control maximum line length in html output?

[BP Jonsson]

I just downloaded and installed the current tidy5 from
<http://www.htacg.org/binaries/>  There were some harmless
warnings about missing metadata which I inspected and ignored.

You call it as tidy5 instead of tidy.


> Den 2015-06-22 04:57, Geoff Russell skrev:
> >
> >
> > On Monday, June 22, 2015 at 11:56:23 AM UTC+9:30, Daniel Staal wrote:
> >>
> >> [snip]
> >>
> >> --As for the rest, it is mine.
> >>
> >> Since you're already using Perl, I have a quick one: Feed the text through
> >> Text::Wrap first.  A couple of extra lines in your script should fix the
> >> problem:
> >>
> >
> > Thank Daniel ... definitely worth investigating, but I'm a little worried
> > that breaking at
> > word boundaries might break html tags in weird places. Perhaps I need to
> > check html
> > syntax details first.

> I would use HTML Tidy. There are some useful links on its WP
> page: <https://en.wikipedia.org/wiki/HTML_Tidy>. If you are on
> something Unixish it should be easy to install. In the Ubuntu
> repo it's simply called "tidy". You will get a slightly old
> version, but that shouldn't affect most normal use cases. It has
> an option exactly for this, presumably designed not to break
> anywhere harmful:

> | --wrap
> | Type: Integer
> | Default: 68
> | Example: 0 (no wrapping), 1, 2, ...
> | This option specifies the right margin Tidy uses for line wrapping.
>     Tidy tries to wrap lines so that they do not exceed this length.
>     Set wrap to zero if you want to disable line wrapping.

> If you are on something Unixish you should say
> `man -H<browser> tidy`, where `<browser>` is the name of your
> favorite web browser, and read its manual in the comfort of said
> browser. Be careful with the --write-back option since there is
> no backup option!

> The Perl wrapper around HTML Tidy is less useful now, since it
> needs you to build its own fork of tidylib,which never
> succeeded for me. I have run it successfully with Capture::Tiny
> though.
> A custom config file is most useful when doing that!

> /bpj

Re: Re: Is it possible to control maximum line length in html output?

[Geoff Russell]

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Another good suggestion ... thanks BPJ.

On Monday, June 22, 2015 at 11:58:10 PM UTC+9:30, BP Jonsson wrote:
>
>
>
> I just downloaded and installed the current tidy5 from 
> <http://www.htacg.org/binaries/>  There were some harmless 
> warnings about missing metadata which I inspected and ignored. 
>
> You call it as tidy5 instead of tidy. 
>
>
> > Den 2015-06-22 04:57, Geoff Russell skrev: 
> > > 
> > > 
> > > On Monday, June 22, 2015 at 11:56:23 AM UTC+9:30, Daniel Staal wrote: 
> > >> 
> > >> [snip] 
> > >> 
> > >> --As for the rest, it is mine. 
> > >> 
> > >> Since you're already using Perl, I have a quick one: Feed the text 
> through 
> > >> Text::Wrap first.  A couple of extra lines in your script should fix 
> the 
> > >> problem: 
> > >> 
> > > 
> > > Thank Daniel ... definitely worth investigating, but I'm a little 
> worried 
> > > that breaking at 
> > > word boundaries might break html tags in weird places. Perhaps I need 
> to 
> > > check html 
> > > syntax details first. 
>
> > I would use HTML Tidy. There are some useful links on its WP 
> > page: <https://en.wikipedia.org/wiki/HTML_Tidy>. If you are on 
> > something Unixish it should be easy to install. In the Ubuntu 
> > repo it's simply called "tidy". You will get a slightly old 
> > version, but that shouldn't affect most normal use cases. It has 
> > an option exactly for this, presumably designed not to break 
> > anywhere harmful: 
>
> > | --wrap 
> > | Type: Integer 
> > | Default: 68 
> > | Example: 0 (no wrapping), 1, 2, ... 
> > | This option specifies the right margin Tidy uses for line wrapping. 
> >     Tidy tries to wrap lines so that they do not exceed this length. 
> >     Set wrap to zero if you want to disable line wrapping. 
>
> > If you are on something Unixish you should say 
> > `man -H<browser> tidy`, where `<browser>` is the name of your 
> > favorite web browser, and read its manual in the comfort of said 
> > browser. Be careful with the --write-back option since there is 
> > no backup option! 
>
> > The Perl wrapper around HTML Tidy is less useful now, since it 
> > needs you to build its own fork of tidylib,which never 
> > succeeded for me. I have run it successfully with Capture::Tiny 
> > though. 
> > A custom config file is most useful when doing that! 
>
> > /bpj 
>
>
>

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