/**
* Converts to CSS
*
* @param ILess_Environment $env
* @return string
*/
public function toCSS(ILess_Environment $env)
{
$value = self::methodExists($this->key, 'toCSS') ? $this->key->toCSS($env) : $this->key;
if ($this->operator) {
$value .= $this->operator;
$value .= self::methodExists($this->value, 'toCSS') ? $this->value->toCSS($env) : $this->value;
}
return '[' . $value . ']';
}
/**
* Creates a SVG gradient
*
* @param ILess_Node $direction
* @return ILess_Node_Url
* @throws ILess_Exception_Compiler If the arguments are invalid
*/
public function svggradient(ILess_Node $direction)
{
if (func_num_args() < 3) {
throw new ILess_Exception_Compiler('svg-gradient expects direction, start_color [start_position], [color position,]..., end_color [end_position]');
}
$arguments = func_get_args();
$stops = array_slice($arguments, 1);
$gradientType = 'linear';
$rectangleDimension = 'x="0" y="0" width="1" height="1"';
$useBase64 = true;
$renderEnv = new ILess_Environment();
$directionValue = $direction->toCSS($renderEnv);
switch ($directionValue) {
case 'to bottom':
$gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"';
break;
case 'to right':
$gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"';
break;
case 'to bottom right':
$gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"';
break;
case 'to top right':
$gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"';
break;
case 'ellipse':
case 'ellipse at center':
$gradientType = 'radial';
$gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"';
$rectangleDimension = 'x="-50" y="-50" width="101" height="101"';
break;
default:
throw new ILess_Exception_Compiler("svg-gradient direction must be 'to bottom', 'to right', 'to bottom right', 'to top right' or 'ellipse at center'");
}
$returner = '<?xml version="1.0" ?>' . '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%" viewBox="0 0 1 1" preserveAspectRatio="none">' . '<' . $gradientType . 'Gradient id="gradient" gradientUnits="userSpaceOnUse" ' . $gradientDirectionSvg . '>';
for ($i = 0; $i < count($stops); $i++) {
if (ILess_Node::propertyExists($stops[$i], 'value') && $stops[$i]->value) {
$color = $stops[$i]->value[0];
$position = $stops[$i]->value[1];
} else {
$color = $stops[$i];
$position = null;
}
if (!$color instanceof ILess_Node_Color || !(($i === 0 || $i + 1 === count($stops)) && $position === null) && !$position instanceof ILess_Node_Dimension) {
throw new ILess_Exception_Compiler('svg-gradient expects direction, start_color [start_position], [color position,]..., end_color [end_position]');
}
if ($position) {
$positionValue = $position->toCSS($renderEnv);
} elseif ($i === 0) {
$positionValue = '0%';
} else {
$positionValue = '100%';
}
$alpha = $color->getAlpha(true);
$returner .= '<stop offset="' . $positionValue . '" stop-color="' . $color->getColor()->toString($this->env->compress, false) . '"' . ($alpha < 1 ? ' stop-opacity="' . $alpha . '"' : '') . '/>';
}
$returner .= '</' . $gradientType . 'Gradient><rect ' . $rectangleDimension . ' fill="url(#gradient)" /></svg>';
if ($useBase64) {
$returner = base64_encode($returner);
}
$returner = "'data:image/svg+xml" . ($useBase64 ? ";base64" : "") . "," . $returner . "'";
return new ILess_Node_Url(new ILess_Node_Anonymous($returner));
}
/**
* Finds a selector
*
* @param ILess_Node $selector
* @param ILess_Node_Ruleset $self
* @param ILess_Environment $env
* @return array
*/
public function find(ILess_Node $selector, ILess_Environment $env, ILess_Node_Ruleset $self = null)
{
$key = $selector->toCSS($env);
if (!$self) {
$self = $this;
}
if (!array_key_exists($key, $this->lookups)) {
$this->lookups[$key] = array();
foreach ($this->rules as $rule) {
if ($rule === $self) {
continue;
}
if ($rule instanceof ILess_Node_Ruleset || $rule instanceof ILess_Node_MixinDefinition) {
foreach ($rule->selectors as $ruleSelector) {
$match = $selector->match($ruleSelector);
if ($match) {
if (count($selector->elements) > $match) {
$this->lookups[$key] = array_merge($this->lookups[$key], $rule->find(new ILess_Node_Selector(array_slice($selector->elements, $match)), $env, $self));
} else {
$this->lookups[$key][] = $rule;
}
break;
}
}
}
}
}
return $this->lookups[$key];
}
