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<?php
function color_help($section) {
switch ($section) {
case 'admin/help#color':
$output = '<p>' . t('Color module allows a site administrator to quickly and easily change the color scheme of the entire site. In order for color module to work however, a theme must be specifically designed to use the color changing features. The default theme, Garland, (as well as its fixed width counterpart, Minnelli) was designed to take advantage of these features. With color module, you can easily change the color of links, backgrounds, text, and more depending on which color module enabled theme you are using. Color module requires your <a href="@url">file download method</a> to be set to public.', array(
'@url' => url('admin/settings/file-system'),
)) . '</p>';
$output .= '<p>' . t("It is important to remember that color module saves a modified copy of the theme's style.css file in the files directory, and includes it after the theme's original style.css. This means that if you make any manual changes to your theme's style.css file, you must save your color settings again, even if they haven't changed. This causes the color module generated version of style.css in the files directory to be recreated using the new version of the original file.") . '</p>';
return $output;
}
}
function color_form_alter($form_id, &$form) {
if ($form_id == 'system_theme_settings' && color_get_info(arg(4)) && function_exists('gd_info')) {
if (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) != FILE_DOWNLOADS_PUBLIC) {
drupal_set_message(t('The color picker only works if the <a href="@url">download method</a> is set to public.', array(
'@url' => url('admin/settings/file-system'),
)));
}
else {
$form['color'] = array(
'#type' => 'fieldset',
'#title' => t('Color scheme'),
'#weight' => -1,
'#attributes' => array(
'id' => 'color_scheme_form',
),
'#theme' => 'color_scheme_form',
);
$form['color'] += color_scheme_form(arg(4));
$form['#submit']['color_scheme_form_submit'] = array();
}
}
if ($form_id == 'system_theme_select_form' || $form_id == 'system_themes') {
$themes = list_themes();
foreach (element_children($form) as $theme) {
if ($screenshot = variable_get('color_' . $theme . '_screenshot', NULL)) {
if (isset($form[$theme]['screenshot'])) {
$form[$theme]['screenshot']['#value'] = theme('image', $screenshot, '', '', array(
'class' => 'screenshot',
), FALSE);
}
}
}
}
}
function _color_page_alter(&$vars) {
global $theme_key;
$path = variable_get('color_' . $theme_key . '_stylesheet', NULL);
if ($path) {
$vars['css']['all']['theme'][$path] = TRUE;
$vars['styles'] = drupal_get_css($vars['css']);
}
$logo = variable_get('color_' . $theme_key . '_logo', NULL);
if ($logo && $vars['logo'] && preg_match('!' . $theme_key . '/logo.png$!', $vars['logo'])) {
$vars['logo'] = base_path() . $logo;
}
}
function color_get_info($theme) {
$path = drupal_get_path('theme', $theme);
$file = $path . '/color/color.inc';
if ($path && file_exists($file)) {
include $file;
return $info;
}
}
function color_get_palette($theme, $default = false) {
$fields = array(
'base',
'link',
'top',
'bottom',
'text',
);
$info = color_get_info($theme);
$keys = array_keys($info['schemes']);
foreach (explode(',', array_shift($keys)) as $k => $scheme) {
$palette[$fields[$k]] = $scheme;
}
return $default ? $palette : variable_get('color_' . $theme . '_palette', $palette);
}
function color_scheme_form($theme) {
$base = drupal_get_path('module', 'color');
$info = color_get_info($theme);
drupal_add_css('misc/farbtastic/farbtastic.css', 'module', 'all', FALSE);
drupal_add_js('misc/farbtastic/farbtastic.js');
drupal_add_css($base . '/color.css', 'module', 'all', FALSE);
drupal_add_js($base . '/color.js');
drupal_add_js(array(
'color' => array(
'reference' => color_get_palette($theme, true),
),
), 'setting');
$current = implode(',', variable_get('color_' . $theme . '_palette', array()));
$current = isset($info['schemes'][$current]) ? $current : ($current == '' ? reset($info['schemes']) : '');
$info['schemes'][''] = t('Custom');
$form['scheme'] = array(
'#type' => 'select',
'#title' => t('Color set'),
'#options' => $info['schemes'],
'#default_value' => $current,
);
$palette = color_get_palette($theme);
$names = array(
'base' => t('Base color'),
'link' => t('Link color'),
'top' => t('Header top'),
'bottom' => t('Header bottom'),
'text' => t('Text color'),
);
$form['palette']['#tree'] = true;
foreach ($palette as $name => $value) {
$form['palette'][$name] = array(
'#type' => 'textfield',
'#title' => $names[$name],
'#default_value' => $value,
'#size' => 8,
);
}
$form['theme'] = array(
'#type' => 'value',
'#value' => arg(4),
);
$form['info'] = array(
'#type' => 'value',
'#value' => $info,
);
return $form;
}
function theme_color_scheme_form($form) {
$theme = $form['theme']['#value'];
$info = $form['info']['#value'];
$path = drupal_get_path('theme', $theme) . '/';
drupal_add_css($path . $info['preview_css']);
$output .= '<div class="color-form clear-block">';
$output .= drupal_render($form['scheme']);
$output .= '<div id="palette" class="clear-block">';
foreach (element_children($form['palette']) as $name) {
$output .= drupal_render($form['palette'][$name]);
}
$output .= '</div>';
$output .= drupal_render($form);
$output .= '<h2>' . t('Preview') . '</h2>';
$output .= '<div id="preview"><div id="text"><h2>Lorem ipsum dolor</h2><p>Sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud <a href="#">exercitation ullamco</a> laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p></div><div id="img" style="background-image: url(' . base_path() . $path . $info['preview_image'] . ')" alt=""></div></div>';
$output .= '</div>';
return $output;
}
function color_scheme_form_submit($form_id, $values) {
if (!isset($values['info'])) {
return;
}
$theme = $values['theme'];
$info = $values['info'];
$palette = $values['palette'];
if ($values['scheme'] != '') {
$scheme = explode(',', $values['scheme']);
foreach ($palette as $k => $color) {
$palette[$k] = array_shift($scheme);
}
}
if (function_exists('memory_get_usage')) {
$source = drupal_get_path('theme', $theme) . '/' . $info['base_image'];
list($width, $height) = getimagesize($source);
$required = $width * $height * 8;
$usage = memory_get_usage();
$limit = parse_size(ini_get('memory_limit'));
if ($usage + $required > $limit) {
drupal_set_message(t('There is not enough memory available to PHP to change this theme\'s color scheme. You need at least %size more. Check the <a href="@url">PHP documentation</a> for more information.', array(
'%size' => format_size($usage + $required - $limit),
'@url' => 'http://www.php.net/manual/en/ini.core.php#ini.sect.resource-limits',
)), 'error');
return;
}
}
foreach (variable_get('color_' . $theme . '_files', array()) as $file) {
@unlink($file);
}
if ($file = dirname($file)) {
@rmdir($file);
}
if (implode(',', color_get_palette($theme, true)) == implode(',', $palette) || $values['op'] == t('Reset to defaults')) {
variable_del('color_' . $theme . '_palette');
variable_del('color_' . $theme . '_stylesheet');
variable_del('color_' . $theme . '_logo');
variable_del('color_' . $theme . '_files');
variable_del('color_' . $theme . '_screenshot');
return;
}
$id = $theme . '-' . substr(md5(serialize($palette) . microtime()), 0, 8);
$paths['color'] = file_directory_path() . '/color';
$paths['target'] = $paths['color'] . '/' . $id;
foreach ($paths as $path) {
file_check_directory($path, FILE_CREATE_DIRECTORY);
}
$paths['target'] = $paths['target'] . '/';
$paths['id'] = $id;
$paths['source'] = drupal_get_path('theme', $theme) . '/';
$paths['stylesheet'] = $paths['target'] . 'style.css';
$paths['files'] = $paths['map'] = array();
variable_set('color_' . $theme . '_palette', $palette);
variable_set('color_' . $theme . '_stylesheet', $paths['stylesheet']);
variable_set('color_' . $theme . '_logo', $paths['target'] . 'logo.png');
foreach ($info['copy'] as $file) {
$base = basename($file);
$source = $paths['source'] . $file;
file_copy($source, $paths['target'] . $base);
$paths['map'][$file] = $base;
$paths['files'][] = $paths['target'] . $base;
}
if ($info['base_image']) {
_color_render_images($theme, $info, $paths, $palette);
}
_color_rewrite_stylesheet($theme, $info, $paths, $palette);
variable_set('color_' . $theme . '_files', $paths['files']);
}
function _color_rewrite_stylesheet($theme, &$info, &$paths, $palette) {
$style = file_get_contents($paths['source'] . 'style.css');
$conversion = $palette;
unset($conversion['base']);
foreach ($conversion as $k => $v) {
$conversion[$k] = drupal_strtolower($v);
}
$default = color_get_palette($theme, true);
list($style, $fixed) = explode("Color Module: Don't touch", $style);
$cwd = getcwd();
chdir(drupal_get_path('theme', $theme));
$style = preg_replace_callback('/@import\\s*["\']([^"\']+)["\'];/', '_color_import_stylesheet', $style);
chdir($cwd);
$style = preg_split('/(#[0-9a-f]{6}|#[0-9a-f]{3})/i', $style, -1, PREG_SPLIT_DELIM_CAPTURE);
$is_color = false;
$output = '';
$base = 'base';
foreach ($style as $chunk) {
if ($is_color) {
$chunk = drupal_strtolower($chunk);
if ($key = array_search($chunk, $default)) {
$chunk = $conversion[$key];
}
else {
$chunk = _color_shift($palette[$base], $default[$base], $chunk, $info['blend_target']);
}
}
else {
if (preg_match('@[^a-z0-9_-](a)[^a-z0-9_-][^/{]*{[^{]+$@i', $chunk)) {
$base = 'link';
}
else {
if (preg_match('/(?<!-)color[^{:]*:[^{#]*$/i', $chunk)) {
$base = 'text';
}
else {
$base = 'base';
}
}
}
$output .= $chunk;
$is_color = !$is_color;
}
$output .= $fixed;
foreach ($paths['map'] as $before => $after) {
$output = str_replace($before, $after, $output);
}
$file = fopen($paths['stylesheet'], 'w+');
fwrite($file, $output);
fclose($file);
$paths['files'][] = $paths['stylesheet'];
@chmod($paths['stylesheet'], 0664);
}
function _color_import_stylesheet($matches) {
return preg_replace('/url\\(([\'"]?)(?![a-z]+:)/i', 'url(\\1' . dirname($matches[1]) . '/', file_get_contents($matches[1]));
}
function _color_render_images($theme, &$info, &$paths, $palette) {
$source = $paths['source'] . '/' . $info['base_image'];
$source = imagecreatefrompng($source);
$width = imagesx($source);
$height = imagesy($source);
$target = imagecreatetruecolor($width, $height);
imagealphablending($target, true);
foreach ($info['fill'] as $color => $fill) {
imagefilledrectangle($target, $fill[0], $fill[1], $fill[0] + $fill[2], $fill[1] + $fill[3], _color_gd($target, $palette[$color]));
}
for ($y = 0; $y < $info['gradient'][3]; ++$y) {
$color = _color_blend($target, $palette['top'], $palette['bottom'], $y / ($info['gradient'][3] - 1));
imagefilledrectangle($target, $info['gradient'][0], $info['gradient'][1] + $y, $info['gradient'][0] + $info['gradient'][2], $info['gradient'][1] + $y + 1, $color);
}
imagecopy($target, $source, 0, 0, 0, 0, $width, $height);
imagedestroy($source);
foreach ($info['slices'] as $file => $coord) {
list($x, $y, $width, $height) = $coord;
$base = basename($file);
$image = $paths['target'] . $base;
if ($file == 'screenshot.png') {
$slice = imagecreatetruecolor(150, 90);
imagecopyresampled($slice, $target, 0, 0, $x, $y, 150, 90, $width, $height);
variable_set('color_' . $theme . '_screenshot', $image);
}
else {
$slice = imagecreatetruecolor($width, $height);
imagecopy($slice, $target, 0, 0, $x, $y, $width, $height);
}
imagepng($slice, $image);
imagedestroy($slice);
$paths['files'][] = $image;
@chmod(realpath($image), 0664);
$paths['map'][$file] = $base;
}
imagedestroy($target);
}
function _color_shift($given, $ref1, $ref2, $target) {
$target = _color_unpack($target, true);
$ref1 = _color_unpack($ref1, true);
$ref2 = _color_unpack($ref2, true);
for ($i = 0; $i < 3; ++$i) {
$numerator += ($ref2[$i] - $ref1[$i]) * ($ref2[$i] - $ref1[$i]);
$denominator += ($target[$i] - $ref1[$i]) * ($target[$i] - $ref1[$i]);
}
$delta = $denominator > 0 ? 1 - sqrt($numerator / $denominator) : 0;
for ($i = 0; $i < 3; ++$i) {
$ref3[$i] = $target[$i] + ($ref1[$i] - $target[$i]) * $delta;
}
$ref2 = _color_rgb2hsl($ref2);
$ref3 = _color_rgb2hsl($ref3);
for ($i = 0; $i < 3; ++$i) {
$shift[$i] = $ref2[$i] - $ref3[$i];
}
$given = _color_unpack($given, true);
for ($i = 0; $i < 3; ++$i) {
$result[$i] = $target[$i] + ($given[$i] - $target[$i]) * $delta;
}
$result = _color_rgb2hsl($result);
for ($i = 0; $i < 3; ++$i) {
$result[$i] = min(1, max(0, $result[$i] + $shift[$i]));
}
$result = _color_hsl2rgb($result);
return _color_pack($result, true);
}
function _color_gd($img, $hex) {
$c = array_merge(array(
$img,
), _color_unpack($hex));
return call_user_func_array('imagecolorallocate', $c);
}
function _color_blend($img, $hex1, $hex2, $alpha) {
$in1 = _color_unpack($hex1);
$in2 = _color_unpack($hex2);
$out = array(
$img,
);
for ($i = 0; $i < 3; ++$i) {
$out[] = $in1[$i] + ($in2[$i] - $in1[$i]) * $alpha;
}
return call_user_func_array('imagecolorallocate', $out);
}
function _color_unpack($hex, $normalize = false) {
if (strlen($hex) == 4) {
$hex = $hex[1] . $hex[1] . $hex[2] . $hex[2] . $hex[3] . $hex[3];
}
$c = hexdec($hex);
for ($i = 16; $i >= 0; $i -= 8) {
$out[] = ($c >> $i & 0xff) / ($normalize ? 255 : 1);
}
return $out;
}
function _color_pack($rgb, $normalize = false) {
foreach ($rgb as $k => $v) {
$out |= $v * ($normalize ? 255 : 1) << 16 - $k * 8;
}
return '#' . str_pad(dechex($out), 6, 0, STR_PAD_LEFT);
}
function _color_hsl2rgb($hsl) {
$h = $hsl[0];
$s = $hsl[1];
$l = $hsl[2];
$m2 = $l <= 0.5 ? $l * ($s + 1) : $l + $s - $l * $s;
$m1 = $l * 2 - $m2;
return array(
_color_hue2rgb($m1, $m2, $h + 0.33333),
_color_hue2rgb($m1, $m2, $h),
_color_hue2rgb($m1, $m2, $h - 0.33333),
);
}
function _color_hue2rgb($m1, $m2, $h) {
$h = $h < 0 ? $h + 1 : ($h > 1 ? $h - 1 : $h);
if ($h * 6 < 1) {
return $m1 + ($m2 - $m1) * $h * 6;
}
if ($h * 2 < 1) {
return $m2;
}
if ($h * 3 < 2) {
return $m1 + ($m2 - $m1) * (0.66666 - $h) * 6;
}
return $m1;
}
function _color_rgb2hsl($rgb) {
$r = $rgb[0];
$g = $rgb[1];
$b = $rgb[2];
$min = min($r, min($g, $b));
$max = max($r, max($g, $b));
$delta = $max - $min;
$l = ($min + $max) / 2;
$s = 0;
if ($l > 0 && $l < 1) {
$s = $delta / ($l < 0.5 ? 2 * $l : 2 - 2 * $l);
}
$h = 0;
if ($delta > 0) {
if ($max == $r && $max != $g) {
$h += ($g - $b) / $delta;
}
if ($max == $g && $max != $b) {
$h += 2 + ($b - $r) / $delta;
}
if ($max == $b && $max != $r) {
$h += 4 + ($r - $g) / $delta;
}
$h /= 6;
}
return array(
$h,
$s,
$l,
);
}