Planning Ahead

I probably look at the front page of this site more than most. I am starting to wonder if it needs a good refresh. Earlier in the year I began writing up some notes on my experiments with ARM development. During this process I ran into a few formatting issues that I worked around. It is still my plan to write up some more of my notes in the future but rather than fight against the current system I might try something new. The next version of WordPress is due out in December, this is probably the best place to start from. Years ago I used a heavily customised site but as WordPress moved on I began to rely more on the templates generated by others. They are good building blocks as they handle the responsive design aspects. I think some more customisation from me might on the cards this time.

WordPress Theme Frustration

I have been using WordPress for this site since I set it up. Over the years the platform has developed significantly. I used to spend hours creating a customised site from scratch. I abandoned this approach a few years ago due to the focus on 'responsive design' allowing the site to be viewed on mobile screen sizes and aspect ratios. I moved to the pre-created templates and modified them.

Trying to make a few small changes today has been frustrating. In part due to the limitations of the parent theme being used. While the overall appearance of the theme I am happy with it is the interaction on the back end that is the problem. Whilst the administrative interface provides customisation options for certain features it didn't allow access the fine grained modification I wanted. I only wanted to change the maximum number of featured posts to display. Ideally this option should have been included when the original theme was created. I suspect however the theme styling was the main thing on the developers mind rather than what functionality was going to be given to the end user. I resolved my issue with a few little tweaks, but a good bit of time wasted in doing so.

Mobile Theme

I was trying to solve the Web Font issue and stumbled across a plug-in for a mobile theme. The theme was set to ignore the Nexus 7 as a mobile device but I have decided to re-enable it for that. I'm unlikely to put further work into a mobile theme. The plug-in is all you are getting.

An Experiment In Web Fonts

DeltaNova might look a little different from today. I have changed the font of the site to something I think is a little easier to read. I am using one of Google's Web Fonts, meaning a font downloaded during the page loading, rather than using the font on your hard disk. Why do this? The main reason is that not all fonts are available on all devices. This was easy to cater for when most people accessed the web with a desktop or laptop with known default fonts, but more people are accessing from varying mobile devices. Using a Web Font will allow me to style the site as I intend it to look without caring what fonts the end user has access to.

So currently I am thinking of sticking with this font. However I have found a small issue. Whilst the site displays correctly on IE & Firefox (Win&Linux) on the desktop I am having mixed results with Chrome on my Nexus 7. The N7 will display correctly in landscape mode but for some reason, portrait mode causes some of the fonts to revert to the fall-back font. I'm left scratching my head on this one but I may need to consider designing a dedicated mobile version of the site.

Plugin Enhancement

My previous modification to the CodeColorer syntax highlighting plugin for WordPress has been integrated into the official 0.9.8 release. I received a request to enhance the modification furthur. Instead of having a long comma separated list of individual line numbers to be highlighted it would be beneficial if ranges of numbers could be specified. I spent a few hours today playing about with PHP again and I have the following solution. The lines are highlighted using [cc lang="php" highlight="161-180"] rather than listing individual line numbers. You can specify a list of comma separated line numbers, number ranges or a combination of both.

codecolorer-core.php

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<?php
/*
CodeColorer plugin core part
http://kpumuk.info/projects/wordpress-plugins/codecolorer
*/
/*
    Copyright 2006 - 2010  Dmytro Shteflyuk <kpumuk@kpumuk.info>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

class CodeColorer {
  var $blocks = array();
  var $comments = array();

  var $geshiExternal = false;
  var $geshiVersion = '1.0.8.6';

  var $samplePhpCode = '
   [cc_php]
   /**
    * Comment
    */
   function hello() {
     echo "Hello!";
     return null;
   }
   exit();
   [/cc_php]
 ';

  /** Search content for code tags and replace it */
  function BeforeHighlightCodeBlock($content) {
    $content = preg_replace('#(\s*)\[cc([^\s\]_]*(?:_[^\s\]]*)?)([^\]]*)\](.*?)\[/cc\2\](\s*)#sie', '$this->PerformHighlightCodeBlock(\'\\4\', \'\\3\', $content, \'\\2\', \'\\1\', \'\\5\');', $content);
    $content = preg_replace('#(\s*)\<code (.*?)\>(.*?)\</code>(\s*)#sie', '$this->PerformHighlightCodeBlock(\'\\3\', \'\\2\', $content, \'\', \'\\1\', \'\\4\');', $content);

    return $content;
  }

  function AfterHighlightCodeBlock($content) {
    $content = str_replace(array_keys($this->blocks), array_values($this->blocks), $content);

    return $content;
  }

  function BeforeProtectComment($content) {
    $content = preg_replace('#(\s*)(\[cc[^\s\]_]*(?:_[^\s\]]*)?[^\]]*\].*?\[/cc\1\])(\s*)#sie', '$this->PerformProtectComment(\'\\2\', $content, \'\\1\', \'\\3\');', $content);
    $content = preg_replace('#(\s*)(\<code .*?\>.*?\</code>)(\s*)#sie', '$this->PerformProtectComment(\'\\2\', $content, \'\\1\', \'\\3\');', $content);

    return $content;
  }

  function AfterProtectComment($content) {
    $content = str_replace(array_keys($this->comments), array_values($this->comments), $content);
    $this->comments = array();

    return $content;
  }

  /**
   * Perform code highlightning
   */
  function PerformHighlightCodeBlock($text, $opts, $content, $suffix = '', $before = '', $after = '') {
    // Preprocess source text
    $text = str_replace(array("\\"", "\\'"), array (""", "\'"), $text);
   $text = preg_replace('/(< \?php)/i', '<?php', $text);
   $text = preg_replace('/(?:^(?:\s*[\r\n])+|\s+$)/', '', $text);

   // Parse options
   $options = CodeColorerOptions::ParseOptions($opts, $suffix);

   if ($options['escaped']) {
     $text = html_entity_decode($text, ENT_QUOTES);
     $text = preg_replace('~&#x0*([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $text);
     $text = preg_replace('~&#0*([0-9]+);~e', 'chr(\\1)', $text);
    }

    $result = '';
    // Check if CodeColorer has been disabled for this particular block
    if (!$options['enabled']) {
      $result = '<code>' . $text . '';
    } else {
      // See if we should force a height
      $num_lines = count(explode("\n", $text));

      $result = $this->PerformHighlightGeshi($text, $options);

      $result = $this->AddContainer($result, $options, $num_lines);
    }

    if ($options['inline']) {
      $blockID = $this->GetBlockID($content, false, '<span>', '</span>');
    } else {
      $blockID = $this->GetBlockID($content);
    }
    $this->blocks[$blockID] = $result;

    if ($options['inline']) {
      $result = $before . $blockID . $after;
    } else {
      $result = "\n\n$blockID\n\n";
    }

    return $result;
  }

  /**
   * Perform code protecting from mangling by Wordpress (used in Comments)
   */
  function PerformProtectComment($text, $content, $before, $after) {
    $text = str_replace(array("\\"", "\\'"), array (""", "\'"), $text);

   $blockID = $this->GetBlockID($content, true, '', '');
   $this->comments[$blockID] = $text;

   return $before . $blockID . $after;
 }

 /**
  * Perform code highlighting using GESHi engine
  */
 function PerformHighlightGeshi($content, $options) {
   /* Geshi configuration */
   if (!$this->geshi) {
     $this->geshi = new GeSHi();
     $this->geshi->enable_line_numbers(GESHI_NO_LINE_NUMBERS, 1);
     if (is_feed()) {
       $this->geshi->set_overall_style('padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap');
     }
   }

   $geshi = $this->geshi;
   $geshi->set_source($content);
   $geshi->set_language($options['lang']);
   $geshi->set_overall_class('codecolorer');
   $geshi->set_tab_width($options['tab_size']);
   if (!is_feed()) {
     $geshi->enable_classes($options['theme'] != 'geshi');
     if ($options['nowrap']) {
       $geshi->set_overall_style('white-space:nowrap');
     } else {
       $geshi->set_overall_style('');
     }
   } else {
     $geshi->enable_classes(false);
   }
   if (!is_null($options['strict'])) $geshi->enable_strict_mode($options['strict']);
   if ($options['no_links']) $geshi->enable_keyword_links(false);
   /* Modification */    
    if ($options['highlight']){
       $hlines = explode(',',$options['highlight']);
       $b = array(); /* Empty array to store processed line numbers*/
       foreach($hlines as $v) {
           if (strstr($v,"-")) {
               $c = explode("-",$v);

               for ($i=$c[0]; $i< =$c[1]; $i++) {
                   array_push($b,$i);
               }
           }else{
               array_push($b,$v);
           }
       }
       sort($b); /* Sort the array in ascending numerical order */      
       $geshi->highlight_lines_extra($b);
       $geshi->set_highlight_lines_extra_style('background-color: #ffff66;');
   }
    /* End Modification */



    if ($options['inline']) {
      $geshi->set_header_type(GESHI_HEADER_NONE);
    } else {
      $geshi->set_header_type(GESHI_HEADER_DIV);
    }

    $result = $geshi->parse_code();

    if ($geshi->error()) {
      return $geshi->error();
    }

    if ($options['line_numbers'] && !$options['inline']) {
      $table = '<table cellspacing="0" cellpadding="0"><tbody><tr><td ';
      if (is_feed()) {
        $table .= 'style="padding:5px;text-align:center;color:#888888;background-color:#EEEEEE;border-right: 1px solid #9F9F9F;font: normal 12px/1.4em Monaco, Lucida Console, monospace;"';
      } else {
        $table .= 'class="line-numbers"';
      }
      $table .= '><div>';
      for ($i = 0, $count = substr_count($result, '<br />') + 1; $i < $count; $i++) {
        $table .= ($i + $options['first_line']) . '<br />';
      }
      $result = $table . '</div></td><td>' . $result . '</td></tr></tbody></table>';
    }

    return $result;
  }

  function AddContainer($html, $options, $num_lines) {
    $custom_css_class = empty($options['class']) ? '' : ' ' . $options['class'];
    if ($options['inline']) {
      $theme = empty($options['inline_theme']) ? 'default' : $options['inline_theme'];
      $result  = '<code class="codecolorer ' . $options['lang'] . ' ' . $theme . $custom_css_class . '">';
      $result .= '<span class="' . $options['lang'] . '">' . $html . '</span>';
      $result .= '</code>';
    } else {
      $theme = empty($options['theme']) ? 'default' : $options['theme'];
      $style = 'style="';
      if ($options['nowrap']) $style .= 'overflow:auto;white-space:nowrap;';
      if (is_feed()) $style .= 'border:1px solid #9F9F9F;';
      $style .= $this->GetDimensionRule('width', is_feed() ? $options['rss_width'] : $options['width']);
      if($num_lines > $options['lines'] && $options['lines'] > 0) {
        $style .= $this->GetDimensionRule('height', $options['height']);
      }
      $style .= '"';

      $css_class = 'codecolorer-container ' . $options['lang'] . ' ' . $theme . $custom_css_class;
      if ($options['noborder']) $css_class .= ' codecolorer-noborder';
      $result = '<div class="' . $css_class . '" ' . $style . '>' . $html . '</div>';
    }
    return $result;
  }

  /**
   * Generate a block ID that will be replaced at the end (after all that
   * crazy WP text work!) with the right code
   */
  function GetBlockID($content, $comment = false, $before = '<div>', $after = '</div>') {
    static $num = 0;

    $block = $comment ? 'COMMENT' : 'BLOCK';
    $before = $before . '::CODECOLORER_' . $block . '_';
    $after = '::' . $after;

    // Just do a check to make sure the user
    // hasn't (however unlikely) input block replacements
    // as legit text
    do {
      ++$num;
      $blockID = $before . $num . $after;
    } while (strpos($content, $blockID) !== false);

    return $blockID;
  }

  function GetDimensionRule($dimension, $value) {
    $rule = '';
    if (!empty($value)) $rule = "$dimension:$value" . (is_numeric($value) ? 'px;' : ';');
    return $rule;
  }

  function ShowWarning($type, $title, $message) {
    $disable = ' <a href="options-general.php?page=codecolorer.php&amp;disable=' . $type . '">' . __('Close', 'codecolorer') . '</a>';
    echo '<div id="codecolorer-' . $type . '" class="updated fade"><p><strong>' . $title . "</strong> " . $message . $disable . "</p></div>\n";
  }

  function ShowGeshiWarning() {
    if ($this->geshiExternal) {
      $this->ShowWarning('concurrent', __('CodeColorer has detected a problem.', 'codecolorer'), sprintf(__('We found another plugin based on GeSHi library in your system. CodeColorer will work, but our version of GeSHi contain some patches, so we can\'t guarantee an ideal code highlighting now. Please review your <a href="%1$s">plugins</a>, maybe you don\'t need them all.', 'codecolorer'), "plugins.php"));
    }
  }

  function ShowOptionsPage() {
    $page = $this->GetOptionsPage();
    $page->Show();
  }

  function GetOptionsPage() {
    if (!$this->optionsPage) {
      if (!class_exists('CodeColorerAdmin')) {
        $path = dirname(__FILE__);
        if (!file_exists("$path/codecolorer-admin.php")) return false;
        require_once("$path/codecolorer-admin.php");
      }
      $this->optionsPage = new CodeColorerAdmin($this);
    }
    return $this->optionsPage;
  }

  function GetCodeHighlighted($code) {
    $content = $this->BeforeHighlightCodeBlock($code);
    return $this->AfterHighlightCodeBlock($content);
  }

  function GetSampleCodeHighlighted() {
    return $this->GetCodeHighlighted($this->samplePhpCode);
  }

  function &GetInstance() {
    static $instance = null;

    if (null === $instance) {
      $path = dirname(__FILE__);
      if (!class_exists('CodeColorerOptions')) {
        if (!file_exists("$path/codecolorer-options.php")) return null;
        require_once("$path/codecolorer-options.php");
      }

      $instance = new CodeColorer();

      # Maybe GeSHi has been loaded by some another plugin?
     if (!class_exists('GeSHi')) {
        if (!file_exists("$path/lib/geshi.php")) return null;
        require_once("$path/lib/geshi.php");
      } else {
        $instance->geshiExternal = true;
      }
    }

    return $instance;
  }
}

Site Maintainance

Yesterday I finally completed my modifications to the current version of the site theme. Ever since I modified the date formatting the look had been inconsistent with some page layouts breaking. Hopefully all should be working again. Time to get back to making some worthwhile content.

New Year, New Ideas, Problems Solved

Well its now 2010, Happy New Year!!!, and my mailserver guide is still not on the site. It has not been forgotten and in fact part of the guide is already hidden away under going editing. One of the issues that was delaying progress was finding the best way to display code on the site. There are alot of plugins for WordPress that will do syntax highlighting using Geshi. What I have wanted to do is highlight specific lines of highlighted syntax to make it easier to show changes. I did a little research and found that Geshi already supports the functionality I required but it hadn't been implemented in any WordPress plugins. So I decided to modify one. I selected CodeColorer to modify as it already had a method of processing arguments within the "cc" tag it uses.

The modification is simple but has a few limitations. Firstly each line that needs to be selectively highlighted needs to be referenced by line number. This is easy for a few lines but is going to mean alot of number typing for large chunks of code. That said for really big chunks of code they are probably best split off from the rest of the file anyway. The line highlight only stretches to the limit of the longest line and not the whole of the code window. Only a single colour can be specified for the selective highlight and it only works if the Geshi style is selected rather the the custom CodeColorer themes.

Lets now have a look at the modification and what it does. I only needed to modify the codecolorer-core.php file in the plugin directory with a few lines. I have highlighted the changes on lines 161-167 using the modification. To achieve this I placed a new argument 'highlight' into the tag after the language argument [cc lang="php" highlight="161,162,163,164,165,166,167"]. The 'highlight' argument takes a comma separated list of line numbers to highlight. Thats basically it, the modification takes the line numbers, puts them into an array and passes it on to the inbuilt functionality of Geshi which handles the rest.

codecolorer-core.php

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<?php
/*
CodeColorer plugin core part
http://kpumuk.info/projects/wordpress-plugins/codecolorer
*/
/*
    Copyright 2006 - 2009  Dmytro Shteflyuk <kpumuk@kpumuk.info>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

class CodeColorer {
  var $blocks = array();
  var $comments = array();

  var $geshiExternal = false;
  var $geshiVersion = '1.0.8.4';

  var $samplePhpCode = '
   [cc_php]
   /**
    * Comment
    */
   function hello() {
     echo "Hello!";
     return null;
   }
   exit();
   [/cc_php]
 ';

  /** Search content for code tags and replace it */
  function BeforeHighlightCodeBlock($content) {
    $content = preg_replace('#(\s*)\[cc([^\s\]_]*(?:_[^\s\]]*)?)([^\]]*)\](.*?)\[/cc\2\](\s*)#sie', '$this->PerformHighlightCodeBlock(\'\\4\', \'\\3\', $content, \'\\2\', \'\\1\', \'\\5\');', $content);
    $content = preg_replace('#(\s*)\<code (.*?)\>(.*?)\</code>(\s*)#sie', '$this->PerformHighlightCodeBlock(\'\\3\', \'\\2\', $content, \'\', \'\\1\', \'\\4\');', $content);

    return $content;
  }

  function AfterHighlightCodeBlock($content) {
    $content = str_replace(array_keys($this->blocks), array_values($this->blocks), $content);

    return $content;
  }

  function BeforeProtectComment($content) {
    $content = preg_replace('#(\s*)(\[cc[^\s\]_]*(?:_[^\s\]]*)?[^\]]*\].*?\[/cc\1\])(\s*)#sie', '$this->PerformProtectComment(\'\\2\', $content, \'\\1\', \'\\3\');', $content);
    $content = preg_replace('#(\s*)(\<code .*?\>.*?\</code>)(\s*)#sie', '$this->PerformProtectComment(\'\\2\', $content, \'\\1\', \'\\3\');', $content);

    return $content;
  }

  function AfterProtectComment($content) {
    $content = str_replace(array_keys($this->comments), array_values($this->comments), $content);
    $this->comments = array();

    return $content;
  }

  /**
   * Perform code highlightning
   */
  function PerformHighlightCodeBlock($text, $opts, $content, $suffix = '', $before = '', $after = '') {
    // Preprocess source text
    $text = str_replace(array("\\"", "\\'"), array (""", "\'"), $text);
   $text = preg_replace('/(< \?php)/i', '<?php', $text);
   $text = preg_replace('/(?:^(?:\s*[\r\n])+|\s+$)/', '', $text);

   // Parse options
   $options = CodeColorerOptions::ParseOptions($opts, $suffix);

   if ($options['escaped']) {
     $text = html_entity_decode($text, ENT_QUOTES);
     $text = preg_replace('~&#x0*([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $text);
     $text = preg_replace('~&#0*([0-9]+);~e', 'chr(\\1)', $text);
    }

    $result = '';
    // Check if CodeColorer has been disabled for this particular block
    if (!$options['enabled']) {
      $result = '<code>' . $text . '';
    } else {
      // See if we should force a height
      $num_lines = count(explode("\n", $text));

      $result = $this->PerformHighlightGeshi($text, $options);

      $result = $this->AddContainer($result, $options, $num_lines);
    }

    if ($options['inline']) {
      $blockID = $this->GetBlockID($content, false, '<span>', '</span>');
    } else {
      $blockID = $this->GetBlockID($content);
    }
    $this->blocks[$blockID] = $result;

    if ($options['inline']) {
      $result = $before . $blockID . $after;
    } else {
      $result = "\n\n$blockID\n\n";
    }

    return $result;
  }

  /**
   * Perform code protecting from mangling by Wordpress (used in Comments)
   */
  function PerformProtectComment($text, $content, $before, $after) {
    $text = str_replace(array("\\"", "\\'"), array (""", "\'"), $text);

   $blockID = $this->GetBlockID($content, true, '', '');
   $this->comments[$blockID] = $text;

   return $before . $blockID . $after;
 }

 /**
  * Perform code highlighting using GESHi engine
  */
 function PerformHighlightGeshi($content, $options) {
   /* Geshi configuration */
   if (!$this->geshi) {
     $this->geshi = new GeSHi();
     $this->geshi->enable_line_numbers(GESHI_NO_LINE_NUMBERS, 1);
     if (is_feed()) {
       $this->geshi->set_overall_style('padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap');
     }
   }

   $geshi = $this->geshi;
   $geshi->set_source($content);
   $geshi->set_language($options['lang']);
   $geshi->set_overall_class('codecolorer');
   $geshi->set_tab_width($options['tab_size']);
   if (!is_feed()) {
     $geshi->enable_classes($options['theme'] != 'geshi');
     if ($options['nowrap']) {
       $geshi->set_overall_style('white-space:nowrap');
     } else {
       $geshi->set_overall_style('');
     }
   } else {
     $geshi->enable_classes(false);
   }
   if (!is_null($options['strict'])) $geshi->enable_strict_mode($options['strict']);
   if ($options['no_links']) $geshi->enable_keyword_links(false);
   /* My Custom Bit */    
    if ($options['highlight']){
       $myarray = explode(",",$options['highlight']);
       $geshi->highlight_lines_extra($myarray);
       $geshi->set_highlight_lines_extra_style('background-color: #ffff66;'); /* Select the colour of the highlight */
   }
    /* End My Custom Bit */  
    if ($options['inline']) {
      $geshi->set_header_type(GESHI_HEADER_NONE);
    } else {
      $geshi->set_header_type(GESHI_HEADER_DIV);
    }

    $result = $geshi->parse_code();

    if ($geshi->error()) {
      return $geshi->error();
    }

    if ($options['line_numbers'] && !$options['inline']) {
      $table = '<table cellspacing="0" cellpadding="0"><tbody><tr><td ';
      if (is_feed()) {
        $table .= 'style="padding:5px;text-align:center;color:#888888;background-color:#EEEEEE;border-right: 1px solid #9F9F9F;font: normal 12px/1.4em Monaco, Lucida Console, monospace;"';
      } else {
        $table .= 'class="line-numbers"';
      }
      $table .= '><div>';
      for ($i = 0, $count = substr_count($result, '<br />') + 1; $i < $count; $i++) {
        $table .= ($i + $options['first_line']) . '<br />';
      }
      $result = $table . '</div></td><td>' . $result . '</td></tr></tbody></table>';
    }

    return $result;
  }

  function AddContainer($html, $options, $num_lines) {
    $custom_css_class = empty($options['class']) ? '' : ' ' . $options['class'];
    if ($options['inline']) {
      $theme = empty($options['inline_theme']) ? 'default' : $options['inline_theme'];
      $result  = '<code class="codecolorer ' . $options['lang'] . ' ' . $theme . $custom_css_class . '">';
      $result .= '<span class="' . $options['lang'] . '">' . $html . '</span>';
      $result .= '</code>';
    } else {
      $theme = empty($options['theme']) ? 'default' : $options['theme'];
      $style = 'style="';
      if ($options['nowrap']) $style .= 'overflow:auto;white-space:nowrap;';
      if (is_feed()) $style .= 'border: 1px solid #9F9F9F;';
      $style .= $this->GetDimensionRule('width', is_feed() ? $options['rss_width'] : $options['width']);
      if($num_lines > $options['lines'] && $options['lines'] > 0) {
        $style .= $this->GetDimensionRule('height', $options['height']);
      }
      $style .= '"';

      $css_class = 'codecolorer-container ' . $options['lang'] . ' ' . $theme . $custom_css_class;
      if ($options['noborder']) $css_class .= ' codecolorer-noborder';
      $result = '<div class="' . $css_class . '" ' . $style . '>' . $html . '</div>';
    }
    return $result;
  }

  /**
   * Generate a block ID that will be replaced at the end (after all that
   * crazy WP text work!) with the right code
   */
  function GetBlockID($content, $comment = false, $before = '<div>', $after = '</div>') {
    static $num = 0;

    $block = $comment ? 'COMMENT' : 'BLOCK';
    $before = $before . '::CODECOLORER_' . $block . '_';
    $after = '::' . $after;

    // Just do a check to make sure the user
    // hasn't (however unlikely) input block replacements
    // as legit text
    do {
      ++$num;
      $blockID = $before . $num . $after;
    } while (strpos($content, $blockID) !== false);

    return $blockID;
  }

  function GetDimensionRule($dimension, $value) {
    $rule = '';
    if (!empty($value)) $rule = "$dimension:$value" . (is_numeric($value) ? 'px;' : ';');
    return $rule;
  }

  function ShowWarning($type, $title, $message) {
    $disable = ' <a href="options-general.php?page=codecolorer.php&amp;disable=' . $type . '">' . __('Close', 'codecolorer') . '</a>';
    echo '<div id="codecolorer-' . $type . '" class="updated fade"><p><strong>' . $title . "</strong> " . $message . $disable . "</p></div>\n";
  }

  function ShowGeshiWarning() {
    if ($this->geshiExternal) {
      $this->ShowWarning('concurrent', __('CodeColorer has detected a problem.', 'codecolorer'), sprintf(__('We found another plugin based on GeSHi library in your system. CodeColorer will work, but our version of GeSHi contain some patches, so we can\'t guarantee an ideal code highlighting now. Please review your <a href="%1$s">plugins</a>, maybe you don\'t need them all.', 'codecolorer'), "plugins.php"));
    }
  }

  function ShowOptionsPage() {
    $page = $this->GetOptionsPage();
    $page->Show();
  }

  function GetOptionsPage() {
    if (!$this->optionsPage) {
      if (!class_exists('CodeColorerAdmin')) {
        $path = dirname(__FILE__);
        if (!file_exists("$path/codecolorer-admin.php")) return false;
        require_once("$path/codecolorer-admin.php");
      }
      $this->optionsPage = new CodeColorerAdmin($this);
    }
    return $this->optionsPage;
  }

  function GetCodeHighlighted($code) {
    $content = $this->BeforeHighlightCodeBlock($code);
    return $this->AfterHighlightCodeBlock($content);
  }

  function GetSampleCodeHighlighted() {
    return $this->GetCodeHighlighted($this->samplePhpCode);
  }

  function &GetInstance() {
    static $instance = null;

    if (null === $instance) {
      $path = dirname(__FILE__);
      if (!class_exists('CodeColorerOptions')) {
        if (!file_exists("$path/codecolorer-options.php")) return null;
        require_once("$path/codecolorer-options.php");
      }

      $instance = new CodeColorer();

      # Maybe GeSHi has been loaded by some another plugin?
     if (!class_exists('GeSHi')) {
        if (!file_exists("$path/lib/geshi.php")) return null;
        require_once("$path/lib/geshi.php");
      } else {
        $instance->geshiExternal = true;
      }
    }

    return $instance;
  }
}

A Fatter Website

Deltanova has put on a little weight this weekend and not because of too much curry and beer. The change has taken place to enable the website to fit a 10" netbook screen width. Displays smaller than this are nolonger common on desktop machines so it makes sense to make use of the greater screen width. I'm not maximising to fill 24" displays as thats going too far and reading is more difficult over such a screen width. The change forms part of my plan to put more example code onto the site; wider page means less line wrapping. More tweaks to the site are planned but they are likely to be smaller, less noticable steps.

A Few Changes

Another quiet month from me but a few things have been happening behind the scenes. I have moved the site from personal to professional hosting. The main reason for this is that it gives me a few more features to play about with and everything I need is in the one package without the need for add-on options.

For the time being I have disabled user registration; the majority of those who registered were not real users. I may reenable this in the future but it is not on my todo list in the short term.

I inted to give the theme a refresh as it has been some time since the intial design was implemented and WordPress has changed the way the php tags are embedded in the pages. There are a few minor bugs, mainly the next previous page links which currently appear as duplicates on some pages. The overall idea is to make up a theme suitable for my mailserver guide which is nearing completion.