/**
* 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));
}
/**
* Visits a ruleset node
*
* @param ILess_Node_Ruleset $node The node
* @param ILess_Visitor_Arguments $arguments The arguments
* @return array|ILess_Node_Ruleset
*/
public function visitRuleset(ILess_Node_Ruleset $node, ILess_Visitor_Arguments $arguments)
{
$arguments->visitDeeper = false;
$rulesets = array();
if ($node->firstRoot) {
$this->checkPropertiesInRoot($node->rules);
}
if (!$node->root) {
$paths = array();
foreach ($node->paths as $p) {
if ($p[0]->elements[0]->combinator->value === ' ') {
$p[0]->elements[0]->combinator = new ILess_Node_Combinator('');
}
if ($p[0]->getIsReferenced() && $p[0]->getIsOutput()) {
$paths[] = $p;
}
}
$node->paths = $paths;
// Compile rules and rulesets
for ($i = 0, $count = count($node->rules); $i < $count;) {
$rule = $node->rules[$i];
//if ($rule instanceof ILess_Node_Rule || $rule instanceof ILess_Node_Ruleset) {
//if ($rule instanceof ILess_Node_Ruleset) {
if (ILess_Node::propertyExists($rule, 'rules')) {
// visit because we are moving them out from being a child
$rulesets[] = $this->visit($rule);
array_splice($node->rules, $i, 1);
$count--;
continue;
}
$i++;
}
// accept the visitor to remove rules and refactor itself
// then we can decide now whether we want it or not
if ($count > 0) {
$node->accept($this);
$count = count($node->rules);
if ($count > 0) {
if ($count > 1) {
$this->mergeRules($node->rules);
$this->removeDuplicateRules($node->rules);
}
// now decide whether we keep the ruleset
if (count($node->paths) > 0) {
array_splice($rulesets, 0, 0, array($node));
}
}
} else {
$node->rules = array();
}
} else {
$node->accept($this);
$arguments->visitDeeper = false;
if ($node->firstRoot || count($node->rules) > 0) {
array_splice($rulesets, 0, 0, array($node));
}
}
if (count($rulesets) === 1) {
return $rulesets[0];
}
return $rulesets;
}
/**
* Updates the currentFileInfo object to the $value
*
* @param ILess_Node $node The node to update
* @param boolean $value The value
*/
protected function updateReferenceInCurrentFileInfo(ILess_Node $node, $value)
{
if (isset($node->currentFileInfo)) {
$node->currentFileInfo->reference = $value;
}
if (ILess_Node::propertyExists($node, 'rules')) {
foreach ($node->rules as $rule) {
$this->updateReferenceInCurrentFileInfo($rule, $value);
}
}
}
/**
* Visits a ruleset node
*
* @param ILess_Node_Ruleset $node The node
* @param ILess_Visitor_Arguments $arguments The arguments
*/
public function visitRuleset(ILess_Node_Ruleset $node, ILess_Visitor_Arguments $arguments)
{
if ($node->root) {
return;
}
$allExtends = end($this->allExtendsStack);
$pathsCount = count($node->paths);
// look at each selector path in the ruleset, find any extend matches and then copy, find and replace
for ($extendIndex = 0, $allExtendCount = count($allExtends); $extendIndex < $allExtendCount; $extendIndex++) {
for ($pathIndex = 0; $pathIndex < $pathsCount; $pathIndex++) {
$selectorPath = $node->paths[$pathIndex];
// extending extends happens initially, before the main pass
if (ILess_Node::propertyExists($node, 'extendOnEveryPath') && $node->extendOnEveryPath) {
continue;
}
if (end($selectorPath)->extendList) {
continue;
}
$matches = $this->findMatch($allExtends[$extendIndex], $selectorPath);
if ($matches) {
foreach ($allExtends[$extendIndex]->selfSelectors as $selfSelector) {
$node->paths[] = $this->extendSelector($matches, $selectorPath, $selfSelector);
}
}
}
}
}
