service_links_sprites.module in Service links 6.2

Adds new styles based on sprites.

This plugin implements the rendering based on CSS sprites, generating automatically the needed files and providing two extra styles.

@author Fabio Mucciante (TheCrow)

File

plugins/service_links_sprites.module

<?php

/**
 * @file
 * Adds new styles based on sprites.
 *
 * This plugin implements the rendering based on CSS sprites,
 * generating automatically the needed files and providing
 * two extra styles.
 *
 * @author Fabio Mucciante (TheCrow)
 */
define('SLS_GD_WIDTH', 0);
define('SLS_GD_HEIGHT', 1);
define('SLS_GD_MIME', 'mime');
define('SLS_FILENAME', 'sl_sprites');

/**
 * Implementation of hook_init().
 */
function service_links_sprites_init() {
  if (variable_get('service_links_use_internal_sprites', 0)) {
    drupal_add_css(file_directory_path() . '/' . SLS_FILENAME . '.css');
  }
}

/**
 * Build the CSS file and images.
 */
function sls_build_sprites($files = array()) {
  $sprite_filename = file_directory_path() . '/' . SLS_FILENAME;
  $tot_height = array();
  $images = array();
  $sizes = array();

  //potrebbe essere configurabile
  $css_str = ".service-links ul.links li{display:inline-block;}\n.sprites.service-links span{display:block;}\n.service-links span.hide{display:none;}\n.sprites.service-links {background-repeat: no-repeat; float:left;}\n";
  foreach ($files as $service_id => $file) {
    if (is_file($file)) {
      $img_details = getimagesize($file);
      if (!isset($images[$img_details[SLS_GD_WIDTH]])) {
        $images[$img_details[SLS_GD_WIDTH]] = array();
      }
      $images[$img_details[SLS_GD_WIDTH]][$service_id] = array(
        'height' => $img_details[SLS_GD_HEIGHT],
        'file' => $file,
        'mime' => $img_details[SLS_GD_MIME],
      );
      if (!isset($tot_height[$img_details[SLS_GD_WIDTH]])) {
        $tot_height[$img_details[SLS_GD_WIDTH]] = 0;
      }
      $tot_height[$img_details[SLS_GD_WIDTH]] += $img_details[SLS_GD_HEIGHT];
    }
  }
  foreach ($images as $width => $image) {
    $img_dest = @imagecreatetruecolor($width, $tot_height[$width]);
    $background = @imagecolorallocatealpha($img_dest, 255, 255, 255, 127);
    @imagefill($img_dest, 0, 0, $background);
    @imagealphablending($img_dest, FALSE);
    @imagesavealpha($img_dest, TRUE);
    $y = 0;
    $padding = $width + 2;
    $css_str .= ".sprites.service-links.w{$width} {padding-left: {$padding}px; background-image:url(\"" . SLS_FILENAME . "{$width}.png\");}\n";
    foreach ((array) $image as $service_id => $img_details) {
      switch ($img_details['mime']) {
        case 'image/png':
          $img_src = @imagecreatefrompng($img_details['file']);
          break;
        case 'image/jpeg':
          $img_src = @imagecreatefromjpeg($img_details['file']);
          break;
        case 'image/gif':
          $img_src = @imagecreatefromgif($img_details['file']);
          break;
        default:
          continue;
      }
      $class = str_replace('_', '-', $service_id);
      $sign = $y > 0 ? '-' : '';
      $css_str .= ".sprites.service-links-{$class} {background-position: 0 {$sign}{$y}px; height:{$img_details['height']}px}\n";
      @imagecopy($img_dest, $img_src, 0, $y, 0, 0, $width, $img_details['height']);
      @imagedestroy($img_src);
      $y += $img_details['height'];
      $sizes[$img_details['file']] = $width;
    }
    imagepng($img_dest, $sprite_filename . $width . '.png');
    imagedestroy($img_dest);
  }
  $css_fhandler = fopen($sprite_filename . '.css', 'w');
  if ($css_fhandler && !empty($css_str)) {
    fwrite($css_fhandler, $css_str);
    fclose($css_fhandler);
  }
  variable_set('service_links_sprites_sizes', $sizes);
}

/**
 * Implementation of hook_form_alter().
 */
function service_links_sprites_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'service_links_admin_settings') {
    $form['buttons']['#weight'] = 100;
    $form['sprites'] = array(
      '#type' => 'fieldset',
      '#collapsible' => TRUE,
      '#collapsed' => FALSE,
      '#title' => t('Sprites'),
    );
    $form['sprites']['service_links_use_internal_sprites'] = array(
      '#type' => 'checkbox',
      '#title' => t('Load the CSS file generated by Service Links'),
      '#default_value' => variable_get('service_links_use_internal_sprites', 0),
      '#description' => t('Service Links will build the files needed everytime the modifies are saved in Services tab.'),
    );
  }
  if ($form_id == 'service_links_admin_services') {
    $form['#validate'][] = 'service_links_sprites_validate';
  }
}
function service_links_sprites_validate($form, &$form_state) {
  $services = array_keys(array_filter($form_state['values']['service_links_show']));
  $services = service_links_get_links($services);
  $paths = array();
  foreach ($services as $service_id => $service) {
    $icon = isset($service['icon']) ? $service['icon'] : $service_id . '.png';
    $paths[$service_id] = service_links_expand_path($icon);
  }
  sls_build_sprites($paths);
}

/**
 * Implementation of hook_sl_styles().
 */
function service_links_sprites_sl_styles($nodelink = FALSE) {
  return array(
    'sls_style_image' => t('Only Image (with Sprite)'),
    'sls_style_image_and_text' => t('Image and Text (with Sprite)'),
  );
}

/**
 * Implementation of hook_theme().
 */
function service_links_sprites_theme() {
  return array(
    'sls_style_image' => array(
      'arguments' => array(
        'text' => NULL,
        'url' => NULL,
        'image' => NULL,
        'nodelink' => NULL,
        'attributes' => NULL,
      ),
    ),
    'sls_style_image_and_text' => array(
      'arguments' => array(
        'text' => NULL,
        'url' => NULL,
        'image' => NULL,
        'nodelink' => NULL,
        'attributes' => NULL,
      ),
    ),
  );
}
function theme_sls_style_image($text, $url, $image, $nodelink, $attributes) {
  $width = sls_get_image_size(service_links_expand_path($image));
  $attributes['class'] = empty($attributes['class']) ? "sprites service-links w{$width}" : $attributes['class'] . " sprites service-links w{$width}";
  if ($nodelink) {
    $query = isset($url[1]) ? $url[1] : NULL;
    return array(
      'title' => '<span class="hide">' . $text . '</span>',
      'href' => $url[0],
      'query' => $query,
      'attributes' => $attributes,
      'html' => TRUE,
    );
  }
  else {
    $attributes = array_merge($attributes, array(
      'html' => TRUE,
    ));
    if (isset($url[1])) {
      $attributes['query'] = $url[1];
    }
    return l('<span class="hide">' . $text . '</span>', $url[0], $attributes);
  }
}
function theme_sls_style_image_and_text($text, $url, $image, $nodelink, $attributes) {
  $width = sls_get_image_size(service_links_expand_path($image));
  $attributes['class'] = empty($attributes['class']) ? "sprites service-links w{$width}" : $attributes['class'] . " sprites service-links w{$width}";
  if ($nodelink) {
    $query = isset($url[1]) ? $url[1] : NULL;
    return array(
      'title' => $text,
      'href' => $url[0],
      'query' => $url[1],
      'attributes' => $attributes,
    );
  }
  else {
    if (isset($url[1])) {
      $attributes['query'] = $url[1];
    }
    return l($text, $url[0], $attributes);
  }
}
function sls_get_image_size($filepath = '') {
  static $sizes;
  if (!isset($sizes)) {
    $sizes = variable_get('service_links_sprites_sizes', array());
  }
  if (isset($sizes[$filepath])) {
    return $sizes[$filepath];
  }
  else {
    return 16;
  }
}

Functions

Name	Description
service_links_sprites_form_alter	Implementation of hook_form_alter().
service_links_sprites_init	Implementation of hook_init().
service_links_sprites_sl_styles	Implementation of hook_sl_styles().
service_links_sprites_theme	Implementation of hook_theme().
service_links_sprites_validate
sls_build_sprites	Build the CSS file and images.
sls_get_image_size
theme_sls_style_image
theme_sls_style_image_and_text

Constants

Name	Description
SLS_FILENAME
SLS_GD_HEIGHT
SLS_GD_MIME
SLS_GD_WIDTH	@file Adds new styles based on sprites.