Syntax parsing works, but color is missing

Can you provide a view on the generated markup? e.g. save the page as file or make a screenshot of "view page source" in your browser.

Are you by chance trying to use Geshi with the filtered html format? I was having the same issue and switched to the full html format, with much better results...

have the same problem, tags <drupal5> <drupal6> is highlighting but not <htm><jquery><css><php> of those ive tested. As i can see it in the html is doesnt add any span tags around the code when its presented on the page.

I had the same issue and while I was able to make it work changing the Story to "Full HTML", I was also able to make "Filtered HTML" work by dragging the Geshi Filter to the bottom of the Processing Order.

I'm having this exact same issue since updating Drupal. As in the images pmay has posted, the block itself gets correctly marked with:

<div class="geshifilter">
<pre class="javascript geshifilter-javascript" style="font-family:monospace;">

...

</pre>
</div>

But inside the block, no processing happens.

I've tried this with Drupal 7.2, 7.4 and now 7.7. I'm using the 7.x-1.0 version of Geshi Filter and version 1.0.8.10 of the Geshi library, and I've tried with different other filters (Markdown, Filtered HTML, Full HTML) configuring one first then Geshi, or Geshi first then the other... All to no avail. Code is not highlighted.

I've also configured Geshi Filter to use inline styles or CSS classes. The result is the same.

I had exactly the same problem, switching to Full HTML instead of Filtered HTML solved my problem

I have the same problem in Drupal-7.8. Switching to Full HTML didn't solve the problem in my case.

After coping the 'geshi' library inside the 'geshifilter' module folder, it started to work again.

Ran into the same problem, syntax highlighting didn't appear to be working.

Turns out that not many languages are enabled by default. <drupal5|6>, <c> and <cpp> are though. The problem is that it is rather convoluted to navigate to the settings, you need to find the GeShi Filter General Settings page:
Administration » Configuration » Content authoring » Text formats » GeSHi Filter
OR
http://[yourdomain]/admin/config/content/formats/geshifilter

If you have the administration menu module, this is dead easy to locate, if you don't then the only way is:
- get to: Administration » Configuration » Content authoring » Text formats
- "configure" your text format where you have enabled geshifilter. (If you enabled GeSHi Filter for the "Filtered HTML" format, you will need to make sure that GeSHi comes after "Limit allowed HTML tags")
- you will find a link to "general GeSHi filter settings", this gets you to the above mentioned location.

Finally: Choosing the "Languages" page lets you enable the syntax highlighting you need.

No, that doesn't look right.

I have attached a screenshot on Drupal 7.10 with the Seven admin theme.

@pmay: that issue has been fixed by http://drupalcode.org/project/geshifilter.git/commitdiff/39f0e4f
the fix is not in version 7.x-1.0, but it is in 7.x-1.x-dev

hi, how does the generated markup look like? Is there GeSHi-related stuff (classes, CSS)? See screenshot of what I get with default GeSHi setup on a fresh Drupal 7 install.

@pmay:

can you add a debugging line to function _geshifilter_process from geshifilter.pages.inc (around line 232):

  $text = preg_replace_callback($pattern, create_function('$match', "return _geshifilter_replace_callback(\$match, '$format');"), $text);

  // BEGIN DEBUG CODE
  drupal_set_message(htmlspecialchars($text, ENT_QUOTES, 'UTF-8'));
  // END DEBUG CODE

  return $text;
}

This will show the output of the geshifilter module filtering, before possibly other modules put their hands on it.

Note that because of the caching mechanisms in drupal, you have to change the body text (add a space/newline/random letter), in order to trigger re-filtering

@pmay: I really have no clue what is wrong here.

Can you try the following variation of #20:

  $text = preg_replace_callback($pattern, create_function('$match', "return _geshifilter_replace_callback(\$match, '$format');"), $text);

  // BEGIN DEBUG CODE
  $text = geshifilter_geshi_process('printf("Hello world\n");', 'c');
  drupal_set_message(htmlspecialchars($text, ENT_QUOTES, 'UTF-8'));
  // END DEBUG CODE

  return $text;
}

Warning: don't do this on a live site: all your geshi filtered nodes will have the same "hello world" body, regardless the input.

Well, good to hear that it's fixed now

Seems like this was a caching issue. Can you create a new node with different source code and see if it works from the first time?
If not, please reopen this issue

Apologies for reopening the issue.

I had the same issue, and doing the debug procedure actually detected another problem.

I was initially using the same name for the language-tag as the language name. For example, for rsplus language, I was using <rsplus>. It gave me error message when I tried to save the languages after running the debug. I had to give it a different name.

Hope this will help others who are facing the same issue.

Non-british spelling of colour :)