Data Export

I'm still considering moving this site from being WordPress based over to a static site. My plan is to conduct a few experiments first to see how the process works and if the end result would work the way I want it to.

The first stage in this process has been to export all of the written content from the site to allow it to be converted. What has been a surprise is that despite having posts and comments going back to 2002 it only amounts to a 3.8MB XML file. Being XML there is plenty of data structure information in the file which will increase the file size. So ultimately the actual site data accumulated is even less! Graphics, images & other uploads are obviously not included but I still find it an interesting fact.

New Theme Experiment

I have had a little more time to play with the twentynineteen theme. I'm still not convinced by the new 'blocks' based layout at this stage.  Whilst I get the idea of being able to move the content blocks around when putting a page together the features I want are not yet there.

I have sections of content on this site that I have styled to look like a command line for use when posting command strings.  I would  like to be able to create a block with that style from within the editor and reuse it.  Currently I can only save a section of html and any changes to it will affect all of the other blocks of that type.

I can think of a way around the issue but it isn't that practical. After a little research I discover that I can probably create my own custom blocks or use a plug-in to do so.

This is inconvenient as I either have to trust a plugin going forward and hope that it is maintained or spend the time learning how to make my own blocks. Neither of these options are that desirable.

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.