/**
* Creates the variable. Detects the type.
*
* @param string $name The name of the variable
* @param mixed $value The value of the variable
*
* @return Variable
*/
public static function create($name, $value)
{
$important = false;
// name is marked as !name
if (strpos($name, '!') === 0) {
$important = true;
$name = substr($name, 1);
}
// Color
if (Color::isNamedColor($value) || strtolower($value) === 'transparent' || strpos($value, '#') === 0) {
$value = new ColorNode(new Color($value));
} elseif (preg_match(self::RGBA_COLOR_REGEXP, $value, $matches)) {
// RGB(A) colors
$value = new ColorNode(new Color([$matches[1], $matches[2], $matches[3]], isset($matches[4]) ? $matches[4] : 1));
} elseif (preg_match(self::QUOTED_REGEXP, $value, $matches)) {
$value = new QuotedNode($matches[0], $matches[0][0] == '"' ? $matches[1] : $matches[2]);
} elseif (strpos($value, 'http://') === 0 || strpos($value, 'https://') === 0) {
$value = new AnonymousNode($value);
} elseif (preg_match(self::DIMENSION_REGEXP, $value, $matches)) {
$value = new DimensionNode($matches[1], isset($matches[2]) ? $matches[2] : null);
} else {
$value = new AnonymousNode($value);
}
return new self($name, $value, $important);
}
/**
* @covers toString
*/
public function testToString()
{
$color = new Color('#ffeeaa');
$this->assertEquals('#ffeeaa', $color->toString());
// the format remains the same
$color = new Color('#fea');
$this->assertEquals('#ffeeaa', $color->toString());
$color = new Color('#ff0000');
$this->assertEquals('#ff0000', $color->toString());
$this->assertEquals(255, $color->getRed());
$this->assertEquals(0, $color->getGreen());
$this->assertEquals(0, $color->getBlue());
$color = new Color('#f60000');
$this->assertEquals('#f60000', $color->toString());
$this->assertEquals(246, $color->getRed());
$this->assertEquals(0, $color->getGreen());
$this->assertEquals(0, $color->getBlue());
}
/**
* Color blending
*
* @param callable $mode
* @param Color $color1
* @param Color $color2
* @return ColorNode
*/
protected function colorBlend(callable $mode, Color $color1, Color $color2)
{
$ab = $color1->getAlpha();
// backdrop
$as = $color2->getAlpha();
// source
$r = [];
// result
$ar = $as + $ab * (1 - $as);
$rgb1 = $color1->rgb;
$rgb2 = $color2->rgb;
for ($i = 0; $i < 3; $i++) {
$cb = $rgb1[$i] / 255;
$cs = $rgb2[$i] / 255;
$cr = call_user_func($mode, $cb, $cs);
if ($ar) {
$cr = ($as * $cs + $ab * ($cb - $as * ($cb + $cs - $cr))) / $ar;
}
$r[$i] = $cr * 255;
}
return new ColorNode($r, $ar);
}
/**
* Creates new color from the keyword
*
* @param string $keyword
* @return Color
*/
public static function fromKeyword($keyword)
{
$color = null;
// is this named color?
if (self::isNamedColor($keyword)) {
$color = new Color(substr(Color::color($keyword), 1));
$color->keyword = $keyword;
} elseif ($keyword === 'transparent') {
$color = new Color([255, 255, 255], 0);
$color->isTransparentKeyword = true;
}
return $color;
}
/**
* A catch-all word, such as: `black border-collapse`.
*
* @return ColorNode|KeywordNode|null
*/
protected function parseEntitiesKeyword()
{
$k = $this->input->char('%');
if (!$k) {
$k = $this->input->re('/\\G[_A-Za-z-][_A-Za-z0-9-]*/');
}
if ($k) {
// detected named color and "transparent" keyword
if ($color = Color::fromKeyword($k)) {
return new ColorNode($color);
} else {
return new KeywordNode($k);
}
}
}
