'#ffffff'
];
/**
* @inheritDoc
*/
public function validate($rawvalue)
{
$rawvalue = trim(strtolower($rawvalue));
if (!preg_match('/^#[a-f0-9]{6}$/', $rawvalue)) {
throw new ValidationException('bad color specification');
}
// ignore if default
if ($rawvalue === strtolower($this->config['default'])) {
$rawvalue = '';
}
return $rawvalue;
}
/**
* @inheritDoc
*/
public function renderValue($value, \Doku_Renderer $R, $mode)
{
if ($mode == 'xhtml') {
$R->doc .= '';
} else {
$R->cdata($value);
}
return true;
}
/**
* @inheritDoc
*/
public function renderMultiValue($values, \Doku_Renderer $R, $mode)
{
if ($mode == 'xhtml') {
foreach ($values as $value) {
$this->renderValue($value, $R, $mode);
}
} else {
$R->cdata(implode(', ', $values));
}
return true;
}
/**
* @inheritDoc
*/
public function valueEditor($name, $rawvalue, $htmlID)
{
if (!preg_match('/^#[a-f0-9]{6}$/', $rawvalue)) {
// any non-color (eg. from a previous type) should default to the default
$rawvalue = $this->config['default'];
}
$params = [
'name' => $name,
'value' => $rawvalue,
'class' => 'struct_color',
'type' => 'color',
'id' => $htmlID
];
$attributes = buildAttributes($params, true);
return "";
}
/**
* @inheritDoc
*/
public function renderTagCloudLink($value, \Doku_Renderer $R, $mode, $page, $filter, $weight, $showCount = null)
{
$color = $this->displayValue($value);
if ($mode == 'xhtml') {
$url = wl($page, $filter);
$style = "background-color:$color;";
$R->doc .= "
$color
";
return;
}
$R->internallink("$page?$filter", $color);
}
/**
* Sort by the hue of a color, not by its hex-representation
*/
public function getSortString($value)
{
$hue = $this->getHue(parent::getSortString($value));
return $hue;
}
/**
* Calculate the hue of a color to use it for sorting so we can sort similar colors together.
*
* @param string $color the color as #RRGGBB
* @return float|int
*/
protected function getHue($color)
{
if (!preg_match('/^#[0-9A-F]{6}$/i', $color)) {
return 0;
}
$red = hexdec(substr($color, 1, 2));
$green = hexdec(substr($color, 3, 2));
$blue = hexdec(substr($color, 5, 2));
$min = min([$red, $green, $blue]);
$max = max([$red, $green, $blue]);
if ($max === $red) {
$hue = ($green - $blue) / ($max - $min);
}
if ($max === $green) {
$hue = 2 + ($blue - $red) / ($max - $min);
}
if ($max === $blue) {
$hue = 4 + ($red - $green) / ($max - $min);
}
$hue *= 60;
if ($hue < 0) {
$hue += 360;
}
return $hue;
}
}