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sakura/inc/scssphp--old/src/Compiler.php
Mashiro 933e17ccff Initial commit
2018-05-26 18:59:29 +08:00

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<?php
/**
* SCSSPHP
*
* @copyright 2012-2018 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://leafo.github.io/scssphp
*/
namespace Leafo\ScssPhp;
use Leafo\ScssPhp\Base\Range;
use Leafo\ScssPhp\Block;
use Leafo\ScssPhp\Colors;
use Leafo\ScssPhp\Compiler\Environment;
use Leafo\ScssPhp\Exception\CompilerException;
use Leafo\ScssPhp\Formatter\OutputBlock;
use Leafo\ScssPhp\Node;
use Leafo\ScssPhp\SourceMap\SourceMapGenerator;
use Leafo\ScssPhp\Type;
use Leafo\ScssPhp\Parser;
use Leafo\ScssPhp\Util;
/**
* The scss compiler and parser.
*
* Converting SCSS to CSS is a three stage process. The incoming file is parsed
* by `Parser` into a syntax tree, then it is compiled into another tree
* representing the CSS structure by `Compiler`. The CSS tree is fed into a
* formatter, like `Formatter` which then outputs CSS as a string.
*
* During the first compile, all values are *reduced*, which means that their
* types are brought to the lowest form before being dump as strings. This
* handles math equations, variable dereferences, and the like.
*
* The `compile` function of `Compiler` is the entry point.
*
* In summary:
*
* The `Compiler` class creates an instance of the parser, feeds it SCSS code,
* then transforms the resulting tree to a CSS tree. This class also holds the
* evaluation context, such as all available mixins and variables at any given
* time.
*
* The `Parser` class is only concerned with parsing its input.
*
* The `Formatter` takes a CSS tree, and dumps it to a formatted string,
* handling things like indentation.
*/
/**
* SCSS compiler
*
* @author Leaf Corcoran <leafot@gmail.com>
*/
class Compiler
{
const LINE_COMMENTS = 1;
const DEBUG_INFO = 2;
const WITH_RULE = 1;
const WITH_MEDIA = 2;
const WITH_SUPPORTS = 4;
const WITH_ALL = 7;
const SOURCE_MAP_NONE = 0;
const SOURCE_MAP_INLINE = 1;
const SOURCE_MAP_FILE = 2;
/**
* @var array
*/
static protected $operatorNames = [
'+' => 'add',
'-' => 'sub',
'*' => 'mul',
'/' => 'div',
'%' => 'mod',
'==' => 'eq',
'!=' => 'neq',
'<' => 'lt',
'>' => 'gt',
'<=' => 'lte',
'>=' => 'gte',
'<=>' => 'cmp',
];
/**
* @var array
*/
static protected $namespaces = [
'special' => '%',
'mixin' => '@',
'function' => '^',
];
static public $true = [Type::T_KEYWORD, 'true'];
static public $false = [Type::T_KEYWORD, 'false'];
static public $null = [Type::T_NULL];
static public $nullString = [Type::T_STRING, '', []];
static public $defaultValue = [Type::T_KEYWORD, ''];
static public $selfSelector = [Type::T_SELF];
static public $emptyList = [Type::T_LIST, '', []];
static public $emptyMap = [Type::T_MAP, [], []];
static public $emptyString = [Type::T_STRING, '"', []];
static public $with = [Type::T_KEYWORD, 'with'];
static public $without = [Type::T_KEYWORD, 'without'];
protected $importPaths = [''];
protected $importCache = [];
protected $importedFiles = [];
protected $userFunctions = [];
protected $registeredVars = [];
protected $registeredFeatures = [
'extend-selector-pseudoclass' => false,
'at-error' => true,
'units-level-3' => false,
'global-variable-shadowing' => false,
];
protected $encoding = null;
protected $lineNumberStyle = null;
protected $sourceMap = self::SOURCE_MAP_NONE;
protected $sourceMapOptions = [];
/**
* @var string|\Leafo\ScssPhp\Formatter
*/
protected $formatter = 'Leafo\ScssPhp\Formatter\Nested';
protected $rootEnv;
protected $rootBlock;
/**
* @var \Leafo\ScssPhp\Compiler\Environment
*/
protected $env;
protected $scope;
protected $storeEnv;
protected $charsetSeen;
protected $sourceNames;
private $indentLevel;
private $commentsSeen;
private $extends;
private $extendsMap;
private $parsedFiles;
private $parser;
private $sourceIndex;
private $sourceLine;
private $sourceColumn;
private $stderr;
private $shouldEvaluate;
private $ignoreErrors;
/**
* Constructor
*/
public function __construct()
{
$this->parsedFiles = [];
$this->sourceNames = [];
}
/**
* Compile scss
*
* @api
*
* @param string $code
* @param string $path
*
* @return string
*/
public function compile($code, $path = null)
{
$this->indentLevel = -1;
$this->commentsSeen = [];
$this->extends = [];
$this->extendsMap = [];
$this->sourceIndex = null;
$this->sourceLine = null;
$this->sourceColumn = null;
$this->env = null;
$this->scope = null;
$this->storeEnv = null;
$this->charsetSeen = null;
$this->shouldEvaluate = null;
$this->stderr = fopen('php://stderr', 'w');
$this->parser = $this->parserFactory($path);
$tree = $this->parser->parse($code);
$this->parser = null;
$this->formatter = new $this->formatter();
$this->rootBlock = null;
$this->rootEnv = $this->pushEnv($tree);
$this->injectVariables($this->registeredVars);
$this->compileRoot($tree);
$this->popEnv();
$sourceMapGenerator = null;
if ($this->sourceMap) {
if (is_object($this->sourceMap) && $this->sourceMap instanceof SourceMapGenerator) {
$sourceMapGenerator = $this->sourceMap;
$this->sourceMap = self::SOURCE_MAP_FILE;
} elseif ($this->sourceMap !== self::SOURCE_MAP_NONE) {
$sourceMapGenerator = new SourceMapGenerator($this->sourceMapOptions);
}
}
$out = $this->formatter->format($this->scope, $sourceMapGenerator);
if (! empty($out) && $this->sourceMap && $this->sourceMap !== self::SOURCE_MAP_NONE) {
$sourceMap = $sourceMapGenerator->generateJson();
$sourceMapUrl = null;
switch ($this->sourceMap) {
case self::SOURCE_MAP_INLINE:
$sourceMapUrl = sprintf('data:application/json,%s', Util::encodeURIComponent($sourceMap));
break;
case self::SOURCE_MAP_FILE:
$sourceMapUrl = $sourceMapGenerator->saveMap($sourceMap);
break;
}
$out .= sprintf('/*# sourceMappingURL=%s */', $sourceMapUrl);
}
return $out;
}
/**
* Instantiate parser
*
* @param string $path
*
* @return \Leafo\ScssPhp\Parser
*/
protected function parserFactory($path)
{
$parser = new Parser($path, count($this->sourceNames), $this->encoding);
$this->sourceNames[] = $path;
$this->addParsedFile($path);
return $parser;
}
/**
* Is self extend?
*
* @param array $target
* @param array $origin
*
* @return boolean
*/
protected function isSelfExtend($target, $origin)
{
foreach ($origin as $sel) {
if (in_array($target, $sel)) {
return true;
}
}
return false;
}
/**
* Push extends
*
* @param array $target
* @param array $origin
* @param \stdClass $block
*/
protected function pushExtends($target, $origin, $block)
{
if ($this->isSelfExtend($target, $origin)) {
return;
}
$i = count($this->extends);
$this->extends[] = [$target, $origin, $block];
foreach ($target as $part) {
if (isset($this->extendsMap[$part])) {
$this->extendsMap[$part][] = $i;
} else {
$this->extendsMap[$part] = [$i];
}
}
}
/**
* Make output block
*
* @param string $type
* @param array $selectors
*
* @return \Leafo\ScssPhp\Formatter\OutputBlock
*/
protected function makeOutputBlock($type, $selectors = null)
{
$out = new OutputBlock;
$out->type = $type;
$out->lines = [];
$out->children = [];
$out->parent = $this->scope;
$out->selectors = $selectors;
$out->depth = $this->env->depth;
$out->sourceName = $this->env->block->sourceName;
$out->sourceLine = $this->env->block->sourceLine;
$out->sourceColumn = $this->env->block->sourceColumn;
return $out;
}
/**
* Compile root
*
* @param \Leafo\ScssPhp\Block $rootBlock
*/
protected function compileRoot(Block $rootBlock)
{
$this->rootBlock = $this->scope = $this->makeOutputBlock(Type::T_ROOT);
$this->compileChildrenNoReturn($rootBlock->children, $this->scope);
$this->flattenSelectors($this->scope);
$this->missingSelectors();
}
/**
* Report missing selectors
*/
protected function missingSelectors()
{
foreach ($this->extends as $extend) {
if (isset($extend[3])) {
continue;
}
list($target, $origin, $block) = $extend;
// ignore if !optional
if ($block[2]) {
continue;
}
$target = implode(' ', $target);
$origin = $this->collapseSelectors($origin);
$this->sourceLine = $block[Parser::SOURCE_LINE];
$this->throwError("\"$origin\" failed to @extend \"$target\". The selector \"$target\" was not found.");
}
}
/**
* Flatten selectors
*
* @param \Leafo\ScssPhp\Formatter\OutputBlock $block
* @param string $parentKey
*/
protected function flattenSelectors(OutputBlock $block, $parentKey = null)
{
if ($block->selectors) {
$selectors = [];
foreach ($block->selectors as $s) {
$selectors[] = $s;
if (! is_array($s)) {
continue;
}
// check extends
if (! empty($this->extendsMap)) {
$this->matchExtends($s, $selectors);
// remove duplicates
array_walk($selectors, function (&$value) {
$value = serialize($value);
});
$selectors = array_unique($selectors);
array_walk($selectors, function (&$value) {
$value = unserialize($value);
});
}
}
$block->selectors = [];
$placeholderSelector = false;
foreach ($selectors as $selector) {
if ($this->hasSelectorPlaceholder($selector)) {
$placeholderSelector = true;
continue;
}
$block->selectors[] = $this->compileSelector($selector);
}
if ($placeholderSelector && 0 === count($block->selectors) && null !== $parentKey) {
unset($block->parent->children[$parentKey]);
return;
}
}
foreach ($block->children as $key => $child) {
$this->flattenSelectors($child, $key);
}
}
/**
* Match extends
*
* @param array $selector
* @param array $out
* @param integer $from
* @param boolean $initial
*/
protected function matchExtends($selector, &$out, $from = 0, $initial = true)
{
foreach ($selector as $i => $part) {
if ($i < $from) {
continue;
}
if ($this->matchExtendsSingle($part, $origin)) {
$after = array_slice($selector, $i + 1);
$before = array_slice($selector, 0, $i);
list($before, $nonBreakableBefore) = $this->extractRelationshipFromFragment($before);
foreach ($origin as $new) {
$k = 0;
// remove shared parts
if ($initial) {
while ($k < $i && isset($new[$k]) && $selector[$k] === $new[$k]) {
$k++;
}
}
$replacement = [];
$tempReplacement = $k > 0 ? array_slice($new, $k) : $new;
for ($l = count($tempReplacement) - 1; $l >= 0; $l--) {
$slice = $tempReplacement[$l];
array_unshift($replacement, $slice);
if (! $this->isImmediateRelationshipCombinator(end($slice))) {
break;
}
}
$afterBefore = $l != 0 ? array_slice($tempReplacement, 0, $l) : [];
// Merge shared direct relationships.
$mergedBefore = $this->mergeDirectRelationships($afterBefore, $nonBreakableBefore);
$result = array_merge(
$before,
$mergedBefore,
$replacement,
$after
);
if ($result === $selector) {
continue;
}
$out[] = $result;
// recursively check for more matches
$this->matchExtends($result, $out, count($before) + count($mergedBefore), false);
// selector sequence merging
if (! empty($before) && count($new) > 1) {
$sharedParts = $k > 0 ? array_slice($before, 0, $k) : [];
$postSharedParts = $k > 0 ? array_slice($before, $k) : $before;
list($injectBetweenSharedParts, $nonBreakable2) = $this->extractRelationshipFromFragment($afterBefore);
$result2 = array_merge(
$sharedParts,
$injectBetweenSharedParts,
$postSharedParts,
$nonBreakable2,
$nonBreakableBefore,
$replacement,
$after
);
$out[] = $result2;
}
}
}
}
}
/**
* Match extends single
*
* @param array $rawSingle
* @param array $outOrigin
*
* @return boolean
*/
protected function matchExtendsSingle($rawSingle, &$outOrigin)
{
$counts = [];
$single = [];
foreach ($rawSingle as $part) {
// matches Number
if (! is_string($part)) {
return false;
}
if (! preg_match('/^[\[.:#%]/', $part) && count($single)) {
$single[count($single) - 1] .= $part;
} else {
$single[] = $part;
}
}
$extendingDecoratedTag = false;
if (count($single) > 1) {
$matches = null;
$extendingDecoratedTag = preg_match('/^[a-z0-9]+$/i', $single[0], $matches) ? $matches[0] : false;
}
foreach ($single as $part) {
if (isset($this->extendsMap[$part])) {
foreach ($this->extendsMap[$part] as $idx) {
$counts[$idx] = isset($counts[$idx]) ? $counts[$idx] + 1 : 1;
}
}
}
$outOrigin = [];
$found = false;
foreach ($counts as $idx => $count) {
list($target, $origin, /* $block */) = $this->extends[$idx];
// check count
if ($count !== count($target)) {
continue;
}
$this->extends[$idx][3] = true;
$rem = array_diff($single, $target);
foreach ($origin as $j => $new) {
// prevent infinite loop when target extends itself
if ($this->isSelfExtend($single, $origin)) {
return false;
}
$replacement = end($new);
// Extending a decorated tag with another tag is not possible.
if ($extendingDecoratedTag && $replacement[0] != $extendingDecoratedTag &&
preg_match('/^[a-z0-9]+$/i', $replacement[0])
) {
unset($origin[$j]);
continue;
}
$combined = $this->combineSelectorSingle($replacement, $rem);
if (count(array_diff($combined, $origin[$j][count($origin[$j]) - 1]))) {
$origin[$j][count($origin[$j]) - 1] = $combined;
}
}
$outOrigin = array_merge($outOrigin, $origin);
$found = true;
}
return $found;
}
/**
* Extract a relationship from the fragment.
*
* When extracting the last portion of a selector we will be left with a
* fragment which may end with a direction relationship combinator. This
* method will extract the relationship fragment and return it along side
* the rest.
*
* @param array $fragment The selector fragment maybe ending with a direction relationship combinator.
* @return array The selector without the relationship fragment if any, the relationship fragment.
*/
protected function extractRelationshipFromFragment(array $fragment)
{
$parents = [];
$children = [];
$j = $i = count($fragment);
for (;;) {
$children = $j != $i ? array_slice($fragment, $j, $i - $j) : [];
$parents = array_slice($fragment, 0, $j);
$slice = end($parents);
if (empty($slice) || ! $this->isImmediateRelationshipCombinator($slice[0])) {
break;
}
$j -= 2;
}
return [$parents, $children];
}
/**
* Combine selector single
*
* @param array $base
* @param array $other
*
* @return array
*/
protected function combineSelectorSingle($base, $other)
{
$tag = [];
$out = [];
$wasTag = true;
foreach ([$base, $other] as $single) {
foreach ($single as $part) {
if (preg_match('/^[\[.:#]/', $part)) {
$out[] = $part;
$wasTag = false;
} elseif (preg_match('/^[^_-]/', $part)) {
$tag[] = $part;
$wasTag = true;
} elseif ($wasTag) {
$tag[count($tag) - 1] .= $part;
} else {
$out[count($out) - 1] .= $part;
}
}
}
if (count($tag)) {
array_unshift($out, $tag[0]);
}
return $out;
}
/**
* Compile media
*
* @param \Leafo\ScssPhp\Block $media
*/
protected function compileMedia(Block $media)
{
$this->pushEnv($media);
$mediaQuery = $this->compileMediaQuery($this->multiplyMedia($this->env));
if (! empty($mediaQuery)) {
$this->scope = $this->makeOutputBlock(Type::T_MEDIA, [$mediaQuery]);
$parentScope = $this->mediaParent($this->scope);
$parentScope->children[] = $this->scope;
// top level properties in a media cause it to be wrapped
$needsWrap = false;
foreach ($media->children as $child) {
$type = $child[0];
if ($type !== Type::T_BLOCK &&
$type !== Type::T_MEDIA &&
$type !== Type::T_DIRECTIVE &&
$type !== Type::T_IMPORT
) {
$needsWrap = true;
break;
}
}
if ($needsWrap) {
$wrapped = new Block;
$wrapped->sourceName = $media->sourceName;
$wrapped->sourceIndex = $media->sourceIndex;
$wrapped->sourceLine = $media->sourceLine;
$wrapped->sourceColumn = $media->sourceColumn;
$wrapped->selectors = [];
$wrapped->comments = [];
$wrapped->parent = $media;
$wrapped->children = $media->children;
$media->children = [[Type::T_BLOCK, $wrapped]];
}
$this->compileChildrenNoReturn($media->children, $this->scope);
$this->scope = $this->scope->parent;
}
$this->popEnv();
}
/**
* Media parent
*
* @param \Leafo\ScssPhp\Formatter\OutputBlock $scope
*
* @return \Leafo\ScssPhp\Formatter\OutputBlock
*/
protected function mediaParent(OutputBlock $scope)
{
while (! empty($scope->parent)) {
if (! empty($scope->type) && $scope->type !== Type::T_MEDIA) {
break;
}
$scope = $scope->parent;
}
return $scope;
}
/**
* Compile directive
*
* @param \Leafo\ScssPhp\Block $block
*/
protected function compileDirective(Block $block)
{
$s = '@' . $block->name;
if (! empty($block->value)) {
$s .= ' ' . $this->compileValue($block->value);
}
if ($block->name === 'keyframes' || substr($block->name, -10) === '-keyframes') {
$this->compileKeyframeBlock($block, [$s]);
} else {
$this->compileNestedBlock($block, [$s]);
}
}
/**
* Compile at-root
*
* @param \Leafo\ScssPhp\Block $block
*/
protected function compileAtRoot(Block $block)
{
$env = $this->pushEnv($block);
$envs = $this->compactEnv($env);
$without = isset($block->with) ? $this->compileWith($block->with) : static::WITH_RULE;
// wrap inline selector
if ($block->selector) {
$wrapped = new Block;
$wrapped->sourceName = $block->sourceName;
$wrapped->sourceIndex = $block->sourceIndex;
$wrapped->sourceLine = $block->sourceLine;
$wrapped->sourceColumn = $block->sourceColumn;
$wrapped->selectors = $block->selector;
$wrapped->comments = [];
$wrapped->parent = $block;
$wrapped->children = $block->children;
$block->children = [[Type::T_BLOCK, $wrapped]];
}
$this->env = $this->filterWithout($envs, $without);
$newBlock = $this->spliceTree($envs, $block, $without);
$saveScope = $this->scope;
$this->scope = $this->rootBlock;
$this->compileChild($newBlock, $this->scope);
$this->scope = $saveScope;
$this->env = $this->extractEnv($envs);
$this->popEnv();
}
/**
* Splice parse tree
*
* @param array $envs
* @param \Leafo\ScssPhp\Block $block
* @param integer $without
*
* @return array
*/
private function spliceTree($envs, Block $block, $without)
{
$newBlock = null;
foreach ($envs as $e) {
if (! isset($e->block)) {
continue;
}
if ($e->block === $block) {
continue;
}
if (isset($e->block->type) && $e->block->type === Type::T_AT_ROOT) {
continue;
}
if ($e->block && $this->isWithout($without, $e->block)) {
continue;
}
$b = new Block;
$b->sourceName = $e->block->sourceName;
$b->sourceIndex = $e->block->sourceIndex;
$b->sourceLine = $e->block->sourceLine;
$b->sourceColumn = $e->block->sourceColumn;
$b->selectors = [];
$b->comments = $e->block->comments;
$b->parent = null;
if ($newBlock) {
$type = isset($newBlock->type) ? $newBlock->type : Type::T_BLOCK;
$b->children = [[$type, $newBlock]];
$newBlock->parent = $b;
} elseif (count($block->children)) {
foreach ($block->children as $child) {
if ($child[0] === Type::T_BLOCK) {
$child[1]->parent = $b;
}
}
$b->children = $block->children;
}
if (isset($e->block->type)) {
$b->type = $e->block->type;
}
if (isset($e->block->name)) {
$b->name = $e->block->name;
}
if (isset($e->block->queryList)) {
$b->queryList = $e->block->queryList;
}
if (isset($e->block->value)) {
$b->value = $e->block->value;
}
$newBlock = $b;
}
$type = isset($newBlock->type) ? $newBlock->type : Type::T_BLOCK;
return [$type, $newBlock];
}
/**
* Compile @at-root's with: inclusion / without: exclusion into filter flags
*
* @param array $with
*
* @return integer
*/
private function compileWith($with)
{
static $mapping = [
'rule' => self::WITH_RULE,
'media' => self::WITH_MEDIA,
'supports' => self::WITH_SUPPORTS,
'all' => self::WITH_ALL,
];
// exclude selectors by default
$without = static::WITH_RULE;
if ($this->libMapHasKey([$with, static::$with])) {
$without = static::WITH_ALL;
$list = $this->coerceList($this->libMapGet([$with, static::$with]));
foreach ($list[2] as $item) {
$keyword = $this->compileStringContent($this->coerceString($item));
if (array_key_exists($keyword, $mapping)) {
$without &= ~($mapping[$keyword]);
}
}
}
if ($this->libMapHasKey([$with, static::$without])) {
$without = 0;
$list = $this->coerceList($this->libMapGet([$with, static::$without]));
foreach ($list[2] as $item) {
$keyword = $this->compileStringContent($this->coerceString($item));
if (array_key_exists($keyword, $mapping)) {
$without |= $mapping[$keyword];
}
}
}
return $without;
}
/**
* Filter env stack
*
* @param array $envs
* @param integer $without
*
* @return \Leafo\ScssPhp\Compiler\Environment
*/
private function filterWithout($envs, $without)
{
$filtered = [];
foreach ($envs as $e) {
if ($e->block && $this->isWithout($without, $e->block)) {
continue;
}
$filtered[] = $e;
}
return $this->extractEnv($filtered);
}
/**
* Filter WITH rules
*
* @param integer $without
* @param \Leafo\ScssPhp\Block $block
*
* @return boolean
*/
private function isWithout($without, Block $block)
{
if ((($without & static::WITH_RULE) && isset($block->selectors)) ||
(($without & static::WITH_MEDIA) &&
isset($block->type) && $block->type === Type::T_MEDIA) ||
(($without & static::WITH_SUPPORTS) &&
isset($block->type) && $block->type === Type::T_DIRECTIVE &&
isset($block->name) && $block->name === 'supports')
) {
return true;
}
return false;
}
/**
* Compile keyframe block
*
* @param \Leafo\ScssPhp\Block $block
* @param array $selectors
*/
protected function compileKeyframeBlock(Block $block, $selectors)
{
$env = $this->pushEnv($block);
$envs = $this->compactEnv($env);
$this->env = $this->extractEnv(array_filter($envs, function (Environment $e) {
return ! isset($e->block->selectors);
}));
$this->scope = $this->makeOutputBlock($block->type, $selectors);
$this->scope->depth = 1;
$this->scope->parent->children[] = $this->scope;
$this->compileChildrenNoReturn($block->children, $this->scope);
$this->scope = $this->scope->parent;
$this->env = $this->extractEnv($envs);
$this->popEnv();
}
/**
* Compile nested block
*
* @param \Leafo\ScssPhp\Block $block
* @param array $selectors
*/
protected function compileNestedBlock(Block $block, $selectors)
{
$this->pushEnv($block);
$this->scope = $this->makeOutputBlock($block->type, $selectors);
$this->scope->parent->children[] = $this->scope;
$this->compileChildrenNoReturn($block->children, $this->scope);
$this->scope = $this->scope->parent;
$this->popEnv();
}
/**
* Recursively compiles a block.
*
* A block is analogous to a CSS block in most cases. A single SCSS document
* is encapsulated in a block when parsed, but it does not have parent tags
* so all of its children appear on the root level when compiled.
*
* Blocks are made up of selectors and children.
*
* The children of a block are just all the blocks that are defined within.
*
* Compiling the block involves pushing a fresh environment on the stack,
* and iterating through the props, compiling each one.
*
* @see Compiler::compileChild()
*
* @param \Leafo\ScssPhp\Block $block
*/
protected function compileBlock(Block $block)
{
$env = $this->pushEnv($block);
$env->selectors = $this->evalSelectors($block->selectors);
$out = $this->makeOutputBlock(null);
if (isset($this->lineNumberStyle) && count($env->selectors) && count($block->children)) {
$annotation = $this->makeOutputBlock(Type::T_COMMENT);
$annotation->depth = 0;
$file = $this->sourceNames[$block->sourceIndex];
$line = $block->sourceLine;
switch ($this->lineNumberStyle) {
case static::LINE_COMMENTS:
$annotation->lines[] = '/* line ' . $line
. ($file ? ', ' . $file : '')
. ' */';
break;
case static::DEBUG_INFO:
$annotation->lines[] = '@media -sass-debug-info{'
. ($file ? 'filename{font-family:"' . $file . '"}' : '')
. 'line{font-family:' . $line . '}}';
break;
}
$this->scope->children[] = $annotation;
}
$this->scope->children[] = $out;
if (count($block->children)) {
$out->selectors = $this->multiplySelectors($env);
$this->compileChildrenNoReturn($block->children, $out);
}
$this->formatter->stripSemicolon($out->lines);
$this->popEnv();
}
/**
* Compile root level comment
*
* @param array $block
*/
protected function compileComment($block)
{
$out = $this->makeOutputBlock(Type::T_COMMENT);
$out->lines[] = $block[1];
$this->scope->children[] = $out;
}
/**
* Evaluate selectors
*
* @param array $selectors
*
* @return array
*/
protected function evalSelectors($selectors)
{
$this->shouldEvaluate = false;
$selectors = array_map([$this, 'evalSelector'], $selectors);
// after evaluating interpolates, we might need a second pass
if ($this->shouldEvaluate) {
$buffer = $this->collapseSelectors($selectors);
$parser = $this->parserFactory(__METHOD__);
if ($parser->parseSelector($buffer, $newSelectors)) {
$selectors = array_map([$this, 'evalSelector'], $newSelectors);
}
}
return $selectors;
}
/**
* Evaluate selector
*
* @param array $selector
*
* @return array
*/
protected function evalSelector($selector)
{
return array_map([$this, 'evalSelectorPart'], $selector);
}
/**
* Evaluate selector part; replaces all the interpolates, stripping quotes
*
* @param array $part
*
* @return array
*/
protected function evalSelectorPart($part)
{
foreach ($part as &$p) {
if (is_array($p) && ($p[0] === Type::T_INTERPOLATE || $p[0] === Type::T_STRING)) {
$p = $this->compileValue($p);
// force re-evaluation
if (strpos($p, '&') !== false || strpos($p, ',') !== false) {
$this->shouldEvaluate = true;
}
} elseif (is_string($p) && strlen($p) >= 2 &&
($first = $p[0]) && ($first === '"' || $first === "'") &&
substr($p, -1) === $first
) {
$p = substr($p, 1, -1);
}
}
return $this->flattenSelectorSingle($part);
}
/**
* Collapse selectors
*
* @param array $selectors
*
* @return string
*/
protected function collapseSelectors($selectors)
{
$parts = [];
foreach ($selectors as $selector) {
$output = '';
array_walk_recursive(
$selector,
function ($value, $key) use (&$output) {
$output .= $value;
}
);
$parts[] = $output;
}
return implode(', ', $parts);
}
/**
* Flatten selector single; joins together .classes and #ids
*
* @param array $single
*
* @return array
*/
protected function flattenSelectorSingle($single)
{
$joined = [];
foreach ($single as $part) {
if (empty($joined) ||
! is_string($part) ||
preg_match('/[\[.:#%]/', $part)
) {
$joined[] = $part;
continue;
}
if (is_array(end($joined))) {
$joined[] = $part;
} else {
$joined[count($joined) - 1] .= $part;
}
}
return $joined;
}
/**
* Compile selector to string; self(&) should have been replaced by now
*
* @param string|array $selector
*
* @return string
*/
protected function compileSelector($selector)
{
if (! is_array($selector)) {
return $selector; // media and the like
}
return implode(
' ',
array_map(
[$this, 'compileSelectorPart'],
$selector
)
);
}
/**
* Compile selector part
*
* @param array $piece
*
* @return string
*/
protected function compileSelectorPart($piece)
{
foreach ($piece as &$p) {
if (! is_array($p)) {
continue;
}
switch ($p[0]) {
case Type::T_SELF:
$p = '&';
break;
default:
$p = $this->compileValue($p);
break;
}
}
return implode($piece);
}
/**
* Has selector placeholder?
*
* @param array $selector
*
* @return boolean
*/
protected function hasSelectorPlaceholder($selector)
{
if (! is_array($selector)) {
return false;
}
foreach ($selector as $parts) {
foreach ($parts as $part) {
if (strlen($part) && '%' === $part[0]) {
return true;
}
}
}
return false;
}
/**
* Compile children and return result
*
* @param array $stms
* @param \Leafo\ScssPhp\Formatter\OutputBlock $out
*
* @return array
*/
protected function compileChildren($stms, OutputBlock $out)
{
foreach ($stms as $stm) {
$ret = $this->compileChild($stm, $out);
if (isset($ret)) {
return $ret;
}
}
}
/**
* Compile children and throw exception if unexpected @return
*
* @param array $stms
* @param \Leafo\ScssPhp\Formatter\OutputBlock $out
*
* @throws \Exception
*/
protected function compileChildrenNoReturn($stms, OutputBlock $out)
{
foreach ($stms as $stm) {
$ret = $this->compileChild($stm, $out);
if (isset($ret)) {
$this->throwError('@return may only be used within a function');
return;
}
}
}
/**
* Compile media query
*
* @param array $queryList
*
* @return string
*/
protected function compileMediaQuery($queryList)
{
$out = '@media';
$first = true;
foreach ($queryList as $query) {
$type = null;
$parts = [];
foreach ($query as $q) {
switch ($q[0]) {
case Type::T_MEDIA_TYPE:
if ($type) {
$type = $this->mergeMediaTypes(
$type,
array_map([$this, 'compileValue'], array_slice($q, 1))
);
if (empty($type)) { // merge failed
return null;
}
} else {
$type = array_map([$this, 'compileValue'], array_slice($q, 1));
}
break;
case Type::T_MEDIA_EXPRESSION:
if (isset($q[2])) {
$parts[] = '('
. $this->compileValue($q[1])
. $this->formatter->assignSeparator
. $this->compileValue($q[2])
. ')';
} else {
$parts[] = '('
. $this->compileValue($q[1])
. ')';
}
break;
case Type::T_MEDIA_VALUE:
$parts[] = $this->compileValue($q[1]);
break;
}
}
if ($type) {
array_unshift($parts, implode(' ', array_filter($type)));
}
if (! empty($parts)) {
if ($first) {
$first = false;
$out .= ' ';
} else {
$out .= $this->formatter->tagSeparator;
}
$out .= implode(' and ', $parts);
}
}
return $out;
}
protected function mergeDirectRelationships($selectors1, $selectors2)
{
if (empty($selectors1) || empty($selectors2)) {
return array_merge($selectors1, $selectors2);
}
$part1 = end($selectors1);
$part2 = end($selectors2);
if (! $this->isImmediateRelationshipCombinator($part1[0]) || $part1 !== $part2) {
return array_merge($selectors1, $selectors2);
}
$merged = [];
do {
$part1 = array_pop($selectors1);
$part2 = array_pop($selectors2);
if ($this->isImmediateRelationshipCombinator($part1[0]) && $part1 !== $part2) {
$merged = array_merge($selectors1, [$part1], $selectors2, [$part2], $merged);
break;
}
array_unshift($merged, $part1);
array_unshift($merged, [array_pop($selectors1)[0] . array_pop($selectors2)[0]]);
} while (! empty($selectors1) && ! empty($selectors2));
return $merged;
}
/**
* Merge media types
*
* @param array $type1
* @param array $type2
*
* @return array|null
*/
protected function mergeMediaTypes($type1, $type2)
{
if (empty($type1)) {
return $type2;
}
if (empty($type2)) {
return $type1;
}
$m1 = '';
$t1 = '';
if (count($type1) > 1) {
$m1= strtolower($type1[0]);
$t1= strtolower($type1[1]);
} else {
$t1 = strtolower($type1[0]);
}
$m2 = '';
$t2 = '';
if (count($type2) > 1) {
$m2 = strtolower($type2[0]);
$t2 = strtolower($type2[1]);
} else {
$t2 = strtolower($type2[0]);
}
if (($m1 === Type::T_NOT) ^ ($m2 === Type::T_NOT)) {
if ($t1 === $t2) {
return null;
}
return [
$m1 === Type::T_NOT ? $m2 : $m1,
$m1 === Type::T_NOT ? $t2 : $t1,
];
}
if ($m1 === Type::T_NOT && $m2 === Type::T_NOT) {
// CSS has no way of representing "neither screen nor print"
if ($t1 !== $t2) {
return null;
}
return [Type::T_NOT, $t1];
}
if ($t1 !== $t2) {
return null;
}
// t1 == t2, neither m1 nor m2 are "not"
return [empty($m1)? $m2 : $m1, $t1];
}
/**
* Compile import; returns true if the value was something that could be imported
*
* @param array $rawPath
* @param array $out
* @param boolean $once
*
* @return boolean
*/
protected function compileImport($rawPath, $out, $once = false)
{
if ($rawPath[0] === Type::T_STRING) {
$path = $this->compileStringContent($rawPath);
if ($path = $this->findImport($path)) {
if (! $once || ! in_array($path, $this->importedFiles)) {
$this->importFile($path, $out);
$this->importedFiles[] = $path;
}
return true;
}
return false;
}
if ($rawPath[0] === Type::T_LIST) {
// handle a list of strings
if (count($rawPath[2]) === 0) {
return false;
}
foreach ($rawPath[2] as $path) {
if ($path[0] !== Type::T_STRING) {
return false;
}
}
foreach ($rawPath[2] as $path) {
$this->compileImport($path, $out);
}
return true;
}
return false;
}
/**
* Compile child; returns a value to halt execution
*
* @param array $child
* @param \Leafo\ScssPhp\Formatter\OutputBlock $out
*
* @return array
*/
protected function compileChild($child, OutputBlock $out)
{
$this->sourceIndex = isset($child[Parser::SOURCE_INDEX]) ? $child[Parser::SOURCE_INDEX] : null;
$this->sourceLine = isset($child[Parser::SOURCE_LINE]) ? $child[Parser::SOURCE_LINE] : -1;
$this->sourceColumn = isset($child[Parser::SOURCE_COLUMN]) ? $child[Parser::SOURCE_COLUMN] : -1;
switch ($child[0]) {
case Type::T_SCSSPHP_IMPORT_ONCE:
list(, $rawPath) = $child;
$rawPath = $this->reduce($rawPath);
if (! $this->compileImport($rawPath, $out, true)) {
$out->lines[] = '@import ' . $this->compileValue($rawPath) . ';';
}
break;
case Type::T_IMPORT:
list(, $rawPath) = $child;
$rawPath = $this->reduce($rawPath);
if (! $this->compileImport($rawPath, $out)) {
$out->lines[] = '@import ' . $this->compileValue($rawPath) . ';';
}
break;
case Type::T_DIRECTIVE:
$this->compileDirective($child[1]);
break;
case Type::T_AT_ROOT:
$this->compileAtRoot($child[1]);
break;
case Type::T_MEDIA:
$this->compileMedia($child[1]);
break;
case Type::T_BLOCK:
$this->compileBlock($child[1]);
break;
case Type::T_CHARSET:
if (! $this->charsetSeen) {
$this->charsetSeen = true;
$out->lines[] = '@charset ' . $this->compileValue($child[1]) . ';';
}
break;
case Type::T_ASSIGN:
list(, $name, $value) = $child;
if ($name[0] === Type::T_VARIABLE) {
$flags = isset($child[3]) ? $child[3] : [];
$isDefault = in_array('!default', $flags);
$isGlobal = in_array('!global', $flags);
if ($isGlobal) {
$this->set($name[1], $this->reduce($value), false, $this->rootEnv);
break;
}
$shouldSet = $isDefault &&
(($result = $this->get($name[1], false)) === null
|| $result === static::$null);
if (! $isDefault || $shouldSet) {
$this->set($name[1], $this->reduce($value));
}
break;
}
$compiledName = $this->compileValue($name);
// handle shorthand syntax: size / line-height
if ($compiledName === 'font') {
if ($value[0] === Type::T_EXPRESSION && $value[1] === '/') {
$value = $this->expToString($value);
} elseif ($value[0] === Type::T_LIST) {
foreach ($value[2] as &$item) {
if ($item[0] === Type::T_EXPRESSION && $item[1] === '/') {
$item = $this->expToString($item);
}
}
}
}
// if the value reduces to null from something else then
// the property should be discarded
if ($value[0] !== Type::T_NULL) {
$value = $this->reduce($value);
if ($value[0] === Type::T_NULL || $value === static::$nullString) {
break;
}
}
$compiledValue = $this->compileValue($value);
$out->lines[] = $this->formatter->property(
$compiledName,
$compiledValue
);
break;
case Type::T_COMMENT:
if ($out->type === Type::T_ROOT) {
$this->compileComment($child);
break;
}
$out->lines[] = $child[1];
break;
case Type::T_MIXIN:
case Type::T_FUNCTION:
list(, $block) = $child;
$this->set(static::$namespaces[$block->type] . $block->name, $block);
break;
case Type::T_EXTEND:
list(, $selectors) = $child;
foreach ($selectors as $sel) {
$results = $this->evalSelectors([$sel]);
foreach ($results as $result) {
// only use the first one
$result = current($result);
$this->pushExtends($result, $out->selectors, $child);
}
}
break;
case Type::T_IF:
list(, $if) = $child;
if ($this->isTruthy($this->reduce($if->cond, true))) {
return $this->compileChildren($if->children, $out);
}
foreach ($if->cases as $case) {
if ($case->type === Type::T_ELSE ||
$case->type === Type::T_ELSEIF && $this->isTruthy($this->reduce($case->cond))
) {
return $this->compileChildren($case->children, $out);
}
}
break;
case Type::T_EACH:
list(, $each) = $child;
$list = $this->coerceList($this->reduce($each->list));
$this->pushEnv();
foreach ($list[2] as $item) {
if (count($each->vars) === 1) {
$this->set($each->vars[0], $item, true);
} else {
list(,, $values) = $this->coerceList($item);
foreach ($each->vars as $i => $var) {
$this->set($var, isset($values[$i]) ? $values[$i] : static::$null, true);
}
}
$ret = $this->compileChildren($each->children, $out);
if ($ret) {
if ($ret[0] !== Type::T_CONTROL) {
$this->popEnv();
return $ret;
}
if ($ret[1]) {
break;
}
}
}
$this->popEnv();
break;
case Type::T_WHILE:
list(, $while) = $child;
while ($this->isTruthy($this->reduce($while->cond, true))) {
$ret = $this->compileChildren($while->children, $out);
if ($ret) {
if ($ret[0] !== Type::T_CONTROL) {
return $ret;
}
if ($ret[1]) {
break;
}
}
}
break;
case Type::T_FOR:
list(, $for) = $child;
$start = $this->reduce($for->start, true);
$end = $this->reduce($for->end, true);
if (! ($start[2] == $end[2] || $end->unitless())) {
$this->throwError('Incompatible units: "%s" and "%s".', $start->unitStr(), $end->unitStr());
break;
}
$unit = $start[2];
$start = $start[1];
$end = $end[1];
$d = $start < $end ? 1 : -1;
for (;;) {
if ((! $for->until && $start - $d == $end) ||
($for->until && $start == $end)
) {
break;
}
$this->set($for->var, new Node\Number($start, $unit));
$start += $d;
$ret = $this->compileChildren($for->children, $out);
if ($ret) {
if ($ret[0] !== Type::T_CONTROL) {
return $ret;
}
if ($ret[1]) {
break;
}
}
}
break;
case Type::T_BREAK:
return [Type::T_CONTROL, true];
case Type::T_CONTINUE:
return [Type::T_CONTROL, false];
case Type::T_RETURN:
return $this->reduce($child[1], true);
case Type::T_NESTED_PROPERTY:
list(, $prop) = $child;
$prefixed = [];
$prefix = $this->compileValue($prop->prefix) . '-';
foreach ($prop->children as $child) {
switch ($child[0]) {
case Type::T_ASSIGN:
array_unshift($child[1][2], $prefix);
break;
case Type::T_NESTED_PROPERTY:
array_unshift($child[1]->prefix[2], $prefix);
break;
}
$prefixed[] = $child;
}
$this->compileChildrenNoReturn($prefixed, $out);
break;
case Type::T_INCLUDE:
// including a mixin
list(, $name, $argValues, $content) = $child;
$mixin = $this->get(static::$namespaces['mixin'] . $name, false);
if (! $mixin) {
$this->throwError("Undefined mixin $name");
break;
}
$callingScope = $this->getStoreEnv();
// push scope, apply args
$this->pushEnv();
$this->env->depth--;
$storeEnv = $this->storeEnv;
$this->storeEnv = $this->env;
if (isset($content)) {
$content->scope = $callingScope;
$this->setRaw(static::$namespaces['special'] . 'content', $content, $this->env);
}
if (isset($mixin->args)) {
$this->applyArguments($mixin->args, $argValues);
}
$this->env->marker = 'mixin';
$this->compileChildrenNoReturn($mixin->children, $out);
$this->storeEnv = $storeEnv;
$this->popEnv();
break;
case Type::T_MIXIN_CONTENT:
$content = $this->get(static::$namespaces['special'] . 'content', false, $this->getStoreEnv())
?: $this->get(static::$namespaces['special'] . 'content', false, $this->env);
if (! $content) {
$content = new \stdClass();
$content->scope = new \stdClass();
$content->children = $this->storeEnv->parent->block->children;
break;
}
$storeEnv = $this->storeEnv;
$this->storeEnv = $content->scope;
$this->compileChildrenNoReturn($content->children, $out);
$this->storeEnv = $storeEnv;
break;
case Type::T_DEBUG:
list(, $value) = $child;
$line = $this->sourceLine;
$value = $this->compileValue($this->reduce($value, true));
fwrite($this->stderr, "Line $line DEBUG: $value\n");
break;
case Type::T_WARN:
list(, $value) = $child;
$line = $this->sourceLine;
$value = $this->compileValue($this->reduce($value, true));
fwrite($this->stderr, "Line $line WARN: $value\n");
break;
case Type::T_ERROR:
list(, $value) = $child;
$line = $this->sourceLine;
$value = $this->compileValue($this->reduce($value, true));
$this->throwError("Line $line ERROR: $value\n");
break;
case Type::T_CONTROL:
$this->throwError('@break/@continue not permitted in this scope');
break;
default:
$this->throwError("unknown child type: $child[0]");
}
}
/**
* Reduce expression to string
*
* @param array $exp
*
* @return array
*/
protected function expToString($exp)
{
list(, $op, $left, $right, /* $inParens */, $whiteLeft, $whiteRight) = $exp;
$content = [$this->reduce($left)];
if ($whiteLeft) {
$content[] = ' ';
}
$content[] = $op;
if ($whiteRight) {
$content[] = ' ';
}
$content[] = $this->reduce($right);
return [Type::T_STRING, '', $content];
}
/**
* Is truthy?
*
* @param array $value
*
* @return array
*/
protected function isTruthy($value)
{
return $value !== static::$false && $value !== static::$null;
}
/**
* Is the value a direct relationship combinator?
*
* @param string $value
*
* @return boolean
*/
protected function isImmediateRelationshipCombinator($value)
{
return $value === '>' || $value === '+' || $value === '~';
}
/**
* Should $value cause its operand to eval
*
* @param array $value
*
* @return boolean
*/
protected function shouldEval($value)
{
switch ($value[0]) {
case Type::T_EXPRESSION:
if ($value[1] === '/') {
return $this->shouldEval($value[2], $value[3]);
}
// fall-thru
case Type::T_VARIABLE:
case Type::T_FUNCTION_CALL:
return true;
}
return false;
}
/**
* Reduce value
*
* @param array $value
* @param boolean $inExp
*
* @return array|\Leafo\ScssPhp\Node\Number
*/
protected function reduce($value, $inExp = false)
{
list($type) = $value;
switch ($type) {
case Type::T_EXPRESSION:
list(, $op, $left, $right, $inParens) = $value;
$opName = isset(static::$operatorNames[$op]) ? static::$operatorNames[$op] : $op;
$inExp = $inExp || $this->shouldEval($left) || $this->shouldEval($right);
$left = $this->reduce($left, true);
if ($op !== 'and' && $op !== 'or') {
$right = $this->reduce($right, true);
}
// special case: looks like css shorthand
if ($opName == 'div' && ! $inParens && ! $inExp && isset($right[2])
&& (($right[0] !== Type::T_NUMBER && $right[2] != '')
|| ($right[0] === Type::T_NUMBER && ! $right->unitless()))
) {
return $this->expToString($value);
}
$left = $this->coerceForExpression($left);
$right = $this->coerceForExpression($right);
$ltype = $left[0];
$rtype = $right[0];
$ucOpName = ucfirst($opName);
$ucLType = ucfirst($ltype);
$ucRType = ucfirst($rtype);
// this tries:
// 1. op[op name][left type][right type]
// 2. op[left type][right type] (passing the op as first arg
// 3. op[op name]
$fn = "op${ucOpName}${ucLType}${ucRType}";
if (is_callable([$this, $fn]) ||
(($fn = "op${ucLType}${ucRType}") &&
is_callable([$this, $fn]) &&
$passOp = true) ||
(($fn = "op${ucOpName}") &&
is_callable([$this, $fn]) &&
$genOp = true)
) {
$coerceUnit = false;
if (! isset($genOp) &&
$left[0] === Type::T_NUMBER && $right[0] === Type::T_NUMBER
) {
$coerceUnit = true;
switch ($opName) {
case 'mul':
$targetUnit = $left[2];
foreach ($right[2] as $unit => $exp) {
$targetUnit[$unit] = (isset($targetUnit[$unit]) ? $targetUnit[$unit] : 0) + $exp;
}
break;
case 'div':
$targetUnit = $left[2];
foreach ($right[2] as $unit => $exp) {
$targetUnit[$unit] = (isset($targetUnit[$unit]) ? $targetUnit[$unit] : 0) - $exp;
}
break;
case 'mod':
$targetUnit = $left[2];
break;
default:
$targetUnit = $left->unitless() ? $right[2] : $left[2];
}
if (! $left->unitless() && ! $right->unitless()) {
$left = $left->normalize();
$right = $right->normalize();
}
}
$shouldEval = $inParens || $inExp;
if (isset($passOp)) {
$out = $this->$fn($op, $left, $right, $shouldEval);
} else {
$out = $this->$fn($left, $right, $shouldEval);
}
if (isset($out)) {
if ($coerceUnit && $out[0] === Type::T_NUMBER) {
$out = $out->coerce($targetUnit);
}
return $out;
}
}
return $this->expToString($value);
case Type::T_UNARY:
list(, $op, $exp, $inParens) = $value;
$inExp = $inExp || $this->shouldEval($exp);
$exp = $this->reduce($exp);
if ($exp[0] === Type::T_NUMBER) {
switch ($op) {
case '+':
return new Node\Number($exp[1], $exp[2]);
case '-':
return new Node\Number(-$exp[1], $exp[2]);
}
}
if ($op === 'not') {
if ($inExp || $inParens) {
if ($exp === static::$false || $exp === static::$null) {
return static::$true;
}
return static::$false;
}
$op = $op . ' ';
}
return [Type::T_STRING, '', [$op, $exp]];
case Type::T_VARIABLE:
list(, $name) = $value;
return $this->reduce($this->get($name));
case Type::T_LIST:
foreach ($value[2] as &$item) {
$item = $this->reduce($item);
}
return $value;
case Type::T_MAP:
foreach ($value[1] as &$item) {
$item = $this->reduce($item);
}
foreach ($value[2] as &$item) {
$item = $this->reduce($item);
}
return $value;
case Type::T_STRING:
foreach ($value[2] as &$item) {
if (is_array($item) || $item instanceof \ArrayAccess) {
$item = $this->reduce($item);
}
}
return $value;
case Type::T_INTERPOLATE:
$value[1] = $this->reduce($value[1]);
return $value;
case Type::T_FUNCTION_CALL:
list(, $name, $argValues) = $value;
return $this->fncall($name, $argValues);
default:
return $value;
}
}
/**
* Function caller
*
* @param string $name
* @param array $argValues
*
* @return array|null
*/
private function fncall($name, $argValues)
{
// SCSS @function
if ($this->callScssFunction($name, $argValues, $returnValue)) {
return $returnValue;
}
// native PHP functions
if ($this->callNativeFunction($name, $argValues, $returnValue)) {
return $returnValue;
}
// for CSS functions, simply flatten the arguments into a list
$listArgs = [];
foreach ((array) $argValues as $arg) {
if (empty($arg[0])) {
$listArgs[] = $this->reduce($arg[1]);
}
}
return [Type::T_FUNCTION, $name, [Type::T_LIST, ',', $listArgs]];
}
/**
* Normalize name
*
* @param string $name
*
* @return string
*/
protected function normalizeName($name)
{
return str_replace('-', '_', $name);
}
/**
* Normalize value
*
* @param array $value
*
* @return array
*/
public function normalizeValue($value)
{
$value = $this->coerceForExpression($this->reduce($value));
list($type) = $value;
switch ($type) {
case Type::T_LIST:
$value = $this->extractInterpolation($value);
if ($value[0] !== Type::T_LIST) {
return [Type::T_KEYWORD, $this->compileValue($value)];
}
foreach ($value[2] as $key => $item) {
$value[2][$key] = $this->normalizeValue($item);
}
return $value;
case Type::T_STRING:
return [$type, '"', [$this->compileStringContent($value)]];
case Type::T_NUMBER:
return $value->normalize();
case Type::T_INTERPOLATE:
return [Type::T_KEYWORD, $this->compileValue($value)];
default:
return $value;
}
}
/**
* Add numbers
*
* @param array $left
* @param array $right
*
* @return \Leafo\ScssPhp\Node\Number
*/
protected function opAddNumberNumber($left, $right)
{
return new Node\Number($left[1] + $right[1], $left[2]);
}
/**
* Multiply numbers
*
* @param array $left
* @param array $right
*
* @return \Leafo\ScssPhp\Node\Number
*/
protected function opMulNumberNumber($left, $right)
{
return new Node\Number($left[1] * $right[1], $left[2]);
}
/**
* Subtract numbers
*
* @param array $left
* @param array $right
*
* @return \Leafo\ScssPhp\Node\Number
*/
protected function opSubNumberNumber($left, $right)
{
return new Node\Number($left[1] - $right[1], $left[2]);
}
/**
* Divide numbers
*
* @param array $left
* @param array $right
*
* @return array|\Leafo\ScssPhp\Node\Number
*/
protected function opDivNumberNumber($left, $right)
{
if ($right[1] == 0) {
return [Type::T_STRING, '', [$left[1] . $left[2] . '/' . $right[1] . $right[2]]];
}
return new Node\Number($left[1] / $right[1], $left[2]);
}
/**
* Mod numbers
*
* @param array $left
* @param array $right
*
* @return \Leafo\ScssPhp\Node\Number
*/
protected function opModNumberNumber($left, $right)
{
return new Node\Number($left[1] % $right[1], $left[2]);
}
/**
* Add strings
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opAdd($left, $right)
{
if ($strLeft = $this->coerceString($left)) {
if ($right[0] === Type::T_STRING) {
$right[1] = '';
}
$strLeft[2][] = $right;
return $strLeft;
}
if ($strRight = $this->coerceString($right)) {
if ($left[0] === Type::T_STRING) {
$left[1] = '';
}
array_unshift($strRight[2], $left);
return $strRight;
}
}
/**
* Boolean and
*
* @param array $left
* @param array $right
* @param boolean $shouldEval
*
* @return array
*/
protected function opAnd($left, $right, $shouldEval)
{
if (! $shouldEval) {
return;
}
if ($left !== static::$false and $left !== static::$null) {
return $this->reduce($right, true);
}
return $left;
}
/**
* Boolean or
*
* @param array $left
* @param array $right
* @param boolean $shouldEval
*
* @return array
*/
protected function opOr($left, $right, $shouldEval)
{
if (! $shouldEval) {
return;
}
if ($left !== static::$false and $left !== static::$null) {
return $left;
}
return $this->reduce($right, true);
}
/**
* Compare colors
*
* @param string $op
* @param array $left
* @param array $right
*
* @return array
*/
protected function opColorColor($op, $left, $right)
{
$out = [Type::T_COLOR];
foreach ([1, 2, 3] as $i) {
$lval = isset($left[$i]) ? $left[$i] : 0;
$rval = isset($right[$i]) ? $right[$i] : 0;
switch ($op) {
case '+':
$out[] = $lval + $rval;
break;
case '-':
$out[] = $lval - $rval;
break;
case '*':
$out[] = $lval * $rval;
break;
case '%':
$out[] = $lval % $rval;
break;
case '/':
if ($rval == 0) {
$this->throwError("color: Can't divide by zero");
break 2;
}
$out[] = (int) ($lval / $rval);
break;
case '==':
return $this->opEq($left, $right);
case '!=':
return $this->opNeq($left, $right);
default:
$this->throwError("color: unknown op $op");
break 2;
}
}
if (isset($left[4])) {
$out[4] = $left[4];
} elseif (isset($right[4])) {
$out[4] = $right[4];
}
return $this->fixColor($out);
}
/**
* Compare color and number
*
* @param string $op
* @param array $left
* @param array $right
*
* @return array
*/
protected function opColorNumber($op, $left, $right)
{
$value = $right[1];
return $this->opColorColor(
$op,
$left,
[Type::T_COLOR, $value, $value, $value]
);
}
/**
* Compare number and color
*
* @param string $op
* @param array $left
* @param array $right
*
* @return array
*/
protected function opNumberColor($op, $left, $right)
{
$value = $left[1];
return $this->opColorColor(
$op,
[Type::T_COLOR, $value, $value, $value],
$right
);
}
/**
* Compare number1 == number2
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opEq($left, $right)
{
if (($lStr = $this->coerceString($left)) && ($rStr = $this->coerceString($right))) {
$lStr[1] = '';
$rStr[1] = '';
$left = $this->compileValue($lStr);
$right = $this->compileValue($rStr);
}
return $this->toBool($left === $right);
}
/**
* Compare number1 != number2
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opNeq($left, $right)
{
if (($lStr = $this->coerceString($left)) && ($rStr = $this->coerceString($right))) {
$lStr[1] = '';
$rStr[1] = '';
$left = $this->compileValue($lStr);
$right = $this->compileValue($rStr);
}
return $this->toBool($left !== $right);
}
/**
* Compare number1 >= number2
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opGteNumberNumber($left, $right)
{
return $this->toBool($left[1] >= $right[1]);
}
/**
* Compare number1 > number2
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opGtNumberNumber($left, $right)
{
return $this->toBool($left[1] > $right[1]);
}
/**
* Compare number1 <= number2
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opLteNumberNumber($left, $right)
{
return $this->toBool($left[1] <= $right[1]);
}
/**
* Compare number1 < number2
*
* @param array $left
* @param array $right
*
* @return array
*/
protected function opLtNumberNumber($left, $right)
{
return $this->toBool($left[1] < $right[1]);
}
/**
* Three-way comparison, aka spaceship operator
*
* @param array $left
* @param array $right
*
* @return \Leafo\ScssPhp\Node\Number
*/
protected function opCmpNumberNumber($left, $right)
{
$n = $left[1] - $right[1];
return new Node\Number($n ? $n / abs($n) : 0, '');
}
/**
* Cast to boolean
*
* @api
*
* @param mixed $thing
*
* @return array
*/
public function toBool($thing)
{
return $thing ? static::$true : static::$false;
}
/**
* Compiles a primitive value into a CSS property value.
*
* Values in scssphp are typed by being wrapped in arrays, their format is
* typically:
*
* array(type, contents [, additional_contents]*)
*
* The input is expected to be reduced. This function will not work on
* things like expressions and variables.
*
* @api
*
* @param array $value
*
* @return string
*/
public function compileValue($value)
{
$value = $this->reduce($value);
list($type) = $value;
switch ($type) {
case Type::T_KEYWORD:
return $value[1];
case Type::T_COLOR:
// [1] - red component (either number for a %)
// [2] - green component
// [3] - blue component
// [4] - optional alpha component
list(, $r, $g, $b) = $value;
$r = round($r);
$g = round($g);
$b = round($b);
if (count($value) === 5 && $value[4] !== 1) { // rgba
return 'rgba(' . $r . ', ' . $g . ', ' . $b . ', ' . $value[4] . ')';
}
$h = sprintf('#%02x%02x%02x', $r, $g, $b);
// Converting hex color to short notation (e.g. #003399 to #039)
if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) {
$h = '#' . $h[1] . $h[3] . $h[5];
}
return $h;
case Type::T_NUMBER:
return $value->output($this);
case Type::T_STRING:
return $value[1] . $this->compileStringContent($value) . $value[1];
case Type::T_FUNCTION:
$args = ! empty($value[2]) ? $this->compileValue($value[2]) : '';
return "$value[1]($args)";
case Type::T_LIST:
$value = $this->extractInterpolation($value);
if ($value[0] !== Type::T_LIST) {
return $this->compileValue($value);
}
list(, $delim, $items) = $value;
if ($delim !== ' ') {
$delim .= ' ';
}
$filtered = [];
foreach ($items as $item) {
if ($item[0] === Type::T_NULL) {
continue;
}
$filtered[] = $this->compileValue($item);
}
return implode("$delim", $filtered);
case Type::T_MAP:
$keys = $value[1];
$values = $value[2];
$filtered = [];
for ($i = 0, $s = count($keys); $i < $s; $i++) {
$filtered[$this->compileValue($keys[$i])] = $this->compileValue($values[$i]);
}
array_walk($filtered, function (&$value, $key) {
$value = $key . ': ' . $value;
});
return '(' . implode(', ', $filtered) . ')';
case Type::T_INTERPOLATED:
// node created by extractInterpolation
list(, $interpolate, $left, $right) = $value;
list(,, $whiteLeft, $whiteRight) = $interpolate;
$left = count($left[2]) > 0 ?
$this->compileValue($left) . $whiteLeft : '';
$right = count($right[2]) > 0 ?
$whiteRight . $this->compileValue($right) : '';
return $left . $this->compileValue($interpolate) . $right;
case Type::T_INTERPOLATE:
// raw parse node
list(, $exp) = $value;
// strip quotes if it's a string
$reduced = $this->reduce($exp);
switch ($reduced[0]) {
case Type::T_LIST:
$reduced = $this->extractInterpolation($reduced);
if ($reduced[0] !== Type::T_LIST) {
break;
}
list(, $delim, $items) = $reduced;
if ($delim !== ' ') {
$delim .= ' ';
}
$filtered = [];
foreach ($items as $item) {
if ($item[0] === Type::T_NULL) {
continue;
}
$temp = $this->compileValue([Type::T_KEYWORD, $item]);
if ($temp[0] === Type::T_STRING) {
$filtered[] = $this->compileStringContent($temp);
} elseif ($temp[0] === Type::T_KEYWORD) {
$filtered[] = $temp[1];
} else {
$filtered[] = $this->compileValue($temp);
}
}
$reduced = [Type::T_KEYWORD, implode("$delim", $filtered)];
break;
case Type::T_STRING:
$reduced = [Type::T_KEYWORD, $this->compileStringContent($reduced)];
break;
case Type::T_NULL:
$reduced = [Type::T_KEYWORD, ''];
}
return $this->compileValue($reduced);
case Type::T_NULL:
return 'null';
default:
$this->throwError("unknown value type: $type");
}
}
/**
* Flatten list
*
* @param array $list
*
* @return string
*/
protected function flattenList($list)
{
return $this->compileValue($list);
}
/**
* Compile string content
*
* @param array $string
*
* @return string
*/
protected function compileStringContent($string)
{
$parts = [];
foreach ($string[2] as $part) {
if (is_array($part) || $part instanceof \ArrayAccess) {
$parts[] = $this->compileValue($part);
} else {
$parts[] = $part;
}
}
return implode($parts);
}
/**
* Extract interpolation; it doesn't need to be recursive, compileValue will handle that
*
* @param array $list
*
* @return array
*/
protected function extractInterpolation($list)
{
$items = $list[2];
foreach ($items as $i => $item) {
if ($item[0] === Type::T_INTERPOLATE) {
$before = [Type::T_LIST, $list[1], array_slice($items, 0, $i)];
$after = [Type::T_LIST, $list[1], array_slice($items, $i + 1)];
return [Type::T_INTERPOLATED, $item, $before, $after];
}
}
return $list;
}
/**
* Find the final set of selectors
*
* @param \Leafo\ScssPhp\Compiler\Environment $env
*
* @return array
*/
protected function multiplySelectors(Environment $env)
{
$envs = $this->compactEnv($env);
$selectors = [];
$parentSelectors = [[]];
while ($env = array_pop($envs)) {
if (empty($env->selectors)) {
continue;
}
$selectors = [];
foreach ($env->selectors as $selector) {
foreach ($parentSelectors as $parent) {
$selectors[] = $this->joinSelectors($parent, $selector);
}
}
$parentSelectors = $selectors;
}
return $selectors;
}
/**
* Join selectors; looks for & to replace, or append parent before child
*
* @param array $parent
* @param array $child
*
* @return array
*/
protected function joinSelectors($parent, $child)
{
$setSelf = false;
$out = [];
foreach ($child as $part) {
$newPart = [];
foreach ($part as $p) {
if ($p === static::$selfSelector) {
$setSelf = true;
foreach ($parent as $i => $parentPart) {
if ($i > 0) {
$out[] = $newPart;
$newPart = [];
}
foreach ($parentPart as $pp) {
$newPart[] = $pp;
}
}
} else {
$newPart[] = $p;
}
}
$out[] = $newPart;
}
return $setSelf ? $out : array_merge($parent, $child);
}
/**
* Multiply media
*
* @param \Leafo\ScssPhp\Compiler\Environment $env
* @param array $childQueries
*
* @return array
*/
protected function multiplyMedia(Environment $env = null, $childQueries = null)
{
if (! isset($env) ||
! empty($env->block->type) && $env->block->type !== Type::T_MEDIA
) {
return $childQueries;
}
// plain old block, skip
if (empty($env->block->type)) {
return $this->multiplyMedia($env->parent, $childQueries);
}
$parentQueries = isset($env->block->queryList)
? $env->block->queryList
: [[[Type::T_MEDIA_VALUE, $env->block->value]]];
if ($childQueries === null) {
$childQueries = $parentQueries;
} else {
$originalQueries = $childQueries;
$childQueries = [];
foreach ($parentQueries as $parentQuery) {
foreach ($originalQueries as $childQuery) {
$childQueries []= array_merge($parentQuery, $childQuery);
}
}
}
return $this->multiplyMedia($env->parent, $childQueries);
}
/**
* Convert env linked list to stack
*
* @param \Leafo\ScssPhp\Compiler\Environment $env
*
* @return array
*/
private function compactEnv(Environment $env)
{
for ($envs = []; $env; $env = $env->parent) {
$envs[] = $env;
}
return $envs;
}
/**
* Convert env stack to singly linked list
*
* @param array $envs
*
* @return \Leafo\ScssPhp\Compiler\Environment
*/
private function extractEnv($envs)
{
for ($env = null; $e = array_pop($envs);) {
$e->parent = $env;
$env = $e;
}
return $env;
}
/**
* Push environment
*
* @param \Leafo\ScssPhp\Block $block
*
* @return \Leafo\ScssPhp\Compiler\Environment
*/
protected function pushEnv(Block $block = null)
{
$env = new Environment;
$env->parent = $this->env;
$env->store = [];
$env->block = $block;
$env->depth = isset($this->env->depth) ? $this->env->depth + 1 : 0;
$this->env = $env;
return $env;
}
/**
* Pop environment
*/
protected function popEnv()
{
$this->env = $this->env->parent;
}
/**
* Get store environment
*
* @return \Leafo\ScssPhp\Compiler\Environment
*/
protected function getStoreEnv()
{
return isset($this->storeEnv) ? $this->storeEnv : $this->env;
}
/**
* Set variable
*
* @param string $name
* @param mixed $value
* @param boolean $shadow
* @param \Leafo\ScssPhp\Compiler\Environment $env
*/
protected function set($name, $value, $shadow = false, Environment $env = null)
{
$name = $this->normalizeName($name);
if (! isset($env)) {
$env = $this->getStoreEnv();
}
if ($shadow) {
$this->setRaw($name, $value, $env);
} else {
$this->setExisting($name, $value, $env);
}
}
/**
* Set existing variable
*
* @param string $name
* @param mixed $value
* @param \Leafo\ScssPhp\Compiler\Environment $env
*/
protected function setExisting($name, $value, Environment $env)
{
$storeEnv = $env;
$hasNamespace = $name[0] === '^' || $name[0] === '@' || $name[0] === '%';
for (;;) {
if (array_key_exists($name, $env->store)) {
break;
}
if (! $hasNamespace && isset($env->marker)) {
$env = $storeEnv;
break;
}
if (! isset($env->parent)) {
$env = $storeEnv;
break;
}
$env = $env->parent;
}
$env->store[$name] = $value;
}
/**
* Set raw variable
*
* @param string $name
* @param mixed $value
* @param \Leafo\ScssPhp\Compiler\Environment $env
*/
protected function setRaw($name, $value, Environment $env)
{
$env->store[$name] = $value;
}
/**
* Get variable
*
* @api
*
* @param string $name
* @param boolean $shouldThrow
* @param \Leafo\ScssPhp\Compiler\Environment $env
*
* @return mixed
*/
public function get($name, $shouldThrow = true, Environment $env = null)
{
$normalizedName = $this->normalizeName($name);
$specialContentKey = static::$namespaces['special'] . 'content';
if (! isset($env)) {
$env = $this->getStoreEnv();
}
$nextIsRoot = false;
$hasNamespace = $normalizedName[0] === '^' || $normalizedName[0] === '@' || $normalizedName[0] === '%';
for (;;) {
if (array_key_exists($normalizedName, $env->store)) {
return $env->store[$normalizedName];
}
if (! $hasNamespace && isset($env->marker)) {
if (! $nextIsRoot && ! empty($env->store[$specialContentKey])) {
$env = $env->store[$specialContentKey]->scope;
$nextIsRoot = true;
continue;
}
$env = $this->rootEnv;
continue;
}
if (! isset($env->parent)) {
break;
}
$env = $env->parent;
}
if ($shouldThrow) {
$this->throwError("Undefined variable \$$name");
}
// found nothing
}
/**
* Has variable?
*
* @param string $name
* @param \Leafo\ScssPhp\Compiler\Environment $env
*
* @return boolean
*/
protected function has($name, Environment $env = null)
{
return $this->get($name, false, $env) !== null;
}
/**
* Inject variables
*
* @param array $args
*/
protected function injectVariables(array $args)
{
if (empty($args)) {
return;
}
$parser = $this->parserFactory(__METHOD__);
foreach ($args as $name => $strValue) {
if ($name[0] === '$') {
$name = substr($name, 1);
}
if (! $parser->parseValue($strValue, $value)) {
$value = $this->coerceValue($strValue);
}
$this->set($name, $value);
}
}
/**
* Set variables
*
* @api
*
* @param array $variables
*/
public function setVariables(array $variables)
{
$this->registeredVars = array_merge($this->registeredVars, $variables);
}
/**
* Unset variable
*
* @api
*
* @param string $name
*/
public function unsetVariable($name)
{
unset($this->registeredVars[$name]);
}
/**
* Returns list of variables
*
* @api
*
* @return array
*/
public function getVariables()
{
return $this->registeredVars;
}
/**
* Adds to list of parsed files
*
* @api
*
* @param string $path
*/
public function addParsedFile($path)
{
if (isset($path) && file_exists($path)) {
$this->parsedFiles[realpath($path)] = filemtime($path);
}
}
/**
* Returns list of parsed files
*
* @api
*
* @return array
*/
public function getParsedFiles()
{
return $this->parsedFiles;
}
/**
* Add import path
*
* @api
*
* @param string $path
*/
public function addImportPath($path)
{
if (! in_array($path, $this->importPaths)) {
$this->importPaths[] = $path;
}
}
/**
* Set import paths
*
* @api
*
* @param string|array $path
*/
public function setImportPaths($path)
{
$this->importPaths = (array) $path;
}
/**
* Set number precision
*
* @api
*
* @param integer $numberPrecision
*/
public function setNumberPrecision($numberPrecision)
{
Node\Number::$precision = $numberPrecision;
}
/**
* Set formatter
*
* @api
*
* @param string $formatterName
*/
public function setFormatter($formatterName)
{
$this->formatter = $formatterName;
}
/**
* Set line number style
*
* @api
*
* @param string $lineNumberStyle
*/
public function setLineNumberStyle($lineNumberStyle)
{
$this->lineNumberStyle = $lineNumberStyle;
}
/**
* Enable/disable source maps
*
* @api
*
* @param integer $sourceMap
*/
public function setSourceMap($sourceMap)
{
$this->sourceMap = $sourceMap;
}
/**
* Set source map options
*
* @api
*
* @param array $sourceMapOptions
*/
public function setSourceMapOptions($sourceMapOptions)
{
$this->sourceMapOptions = $sourceMapOptions;
}
/**
* Register function
*
* @api
*
* @param string $name
* @param callable $func
* @param array $prototype
*/
public function registerFunction($name, $func, $prototype = null)
{
$this->userFunctions[$this->normalizeName($name)] = [$func, $prototype];
}
/**
* Unregister function
*
* @api
*
* @param string $name
*/
public function unregisterFunction($name)
{
unset($this->userFunctions[$this->normalizeName($name)]);
}
/**
* Add feature
*
* @api
*
* @param string $name
*/
public function addFeature($name)
{
$this->registeredFeatures[$name] = true;
}
/**
* Import file
*
* @param string $path
* @param array $out
*/
protected function importFile($path, $out)
{
// see if tree is cached
$realPath = realpath($path);
if (isset($this->importCache[$realPath])) {
$this->handleImportLoop($realPath);
$tree = $this->importCache[$realPath];
} else {
$code = file_get_contents($path);
$parser = $this->parserFactory($path);
$tree = $parser->parse($code);
$this->importCache[$realPath] = $tree;
}
$pi = pathinfo($path);
array_unshift($this->importPaths, $pi['dirname']);
$this->compileChildrenNoReturn($tree->children, $out);
array_shift($this->importPaths);
}
/**
* Return the file path for an import url if it exists
*
* @api
*
* @param string $url
*
* @return string|null
*/
public function findImport($url)
{
$urls = [];
// for "normal" scss imports (ignore vanilla css and external requests)
if (! preg_match('/\.css$|^https?:\/\//', $url)) {
// try both normal and the _partial filename
$urls = [$url, preg_replace('/[^\/]+$/', '_\0', $url)];
}
$hasExtension = preg_match('/[.]s?css$/', $url);
foreach ($this->importPaths as $dir) {
if (is_string($dir)) {
// check urls for normal import paths
foreach ($urls as $full) {
$full = $dir
. (! empty($dir) && substr($dir, -1) !== '/' ? '/' : '')
. $full;
if ($this->fileExists($file = $full . '.scss') ||
($hasExtension && $this->fileExists($file = $full))
) {
return $file;
}
}
} elseif (is_callable($dir)) {
// check custom callback for import path
$file = call_user_func($dir, $url);
if ($file !== null) {
return $file;
}
}
}
return null;
}
/**
* Set encoding
*
* @api
*
* @param string $encoding
*/
public function setEncoding($encoding)
{
$this->encoding = $encoding;
}
/**
* Ignore errors?
*
* @api
*
* @param boolean $ignoreErrors
*
* @return \Leafo\ScssPhp\Compiler
*/
public function setIgnoreErrors($ignoreErrors)
{
$this->ignoreErrors = $ignoreErrors;
}
/**
* Throw error (exception)
*
* @api
*
* @param string $msg Message with optional sprintf()-style vararg parameters
*
* @throws \Leafo\ScssPhp\Exception\CompilerException
*/
public function throwError($msg)
{
if ($this->ignoreErrors) {
return;
}
if (func_num_args() > 1) {
$msg = call_user_func_array('sprintf', func_get_args());
}
$line = $this->sourceLine;
$msg = "$msg: line: $line";
throw new CompilerException($msg);
}
/**
* Handle import loop
*
* @param string $name
*
* @throws \Exception
*/
protected function handleImportLoop($name)
{
for ($env = $this->env; $env; $env = $env->parent) {
$file = $this->sourceNames[$env->block->sourceIndex];
if (realpath($file) === $name) {
$this->throwError('An @import loop has been found: %s imports %s', $file, basename($file));
break;
}
}
}
/**
* Does file exist?
*
* @param string $name
*
* @return boolean
*/
protected function fileExists($name)
{
return file_exists($name) && is_file($name);
}
/**
* Call SCSS @function
*
* @param string $name
* @param array $argValues
* @param array $returnValue
*
* @return boolean Returns true if returnValue is set; otherwise, false
*/
protected function callScssFunction($name, $argValues, &$returnValue)
{
$func = $this->get(static::$namespaces['function'] . $name, false);
if (! $func) {
return false;
}
$this->pushEnv();
$storeEnv = $this->storeEnv;
$this->storeEnv = $this->env;
// set the args
if (isset($func->args)) {
$this->applyArguments($func->args, $argValues);
}
// throw away lines and children
$tmp = new OutputBlock;
$tmp->lines = [];
$tmp->children = [];
$this->env->marker = 'function';
$ret = $this->compileChildren($func->children, $tmp);
$this->storeEnv = $storeEnv;
$this->popEnv();
$returnValue = ! isset($ret) ? static::$defaultValue : $ret;
return true;
}
/**
* Call built-in and registered (PHP) functions
*
* @param string $name
* @param array $args
* @param array $returnValue
*
* @return boolean Returns true if returnValue is set; otherwise, false
*/
protected function callNativeFunction($name, $args, &$returnValue)
{
// try a lib function
$name = $this->normalizeName($name);
if (isset($this->userFunctions[$name])) {
// see if we can find a user function
list($f, $prototype) = $this->userFunctions[$name];
} elseif (($f = $this->getBuiltinFunction($name)) && is_callable($f)) {
$libName = $f[1];
$prototype = isset(static::$$libName) ? static::$$libName : null;
} else {
return false;
}
list($sorted, $kwargs) = $this->sortArgs($prototype, $args);
if ($name !== 'if' && $name !== 'call') {
foreach ($sorted as &$val) {
$val = $this->reduce($val, true);
}
}
$returnValue = call_user_func($f, $sorted, $kwargs);
if (! isset($returnValue)) {
return false;
}
$returnValue = $this->coerceValue($returnValue);
return true;
}
/**
* Get built-in function
*
* @param string $name Normalized name
*
* @return array
*/
protected function getBuiltinFunction($name)
{
$libName = 'lib' . preg_replace_callback(
'/_(.)/',
function ($m) {
return ucfirst($m[1]);
},
ucfirst($name)
);
return [$this, $libName];
}
/**
* Sorts keyword arguments
*
* @param array $prototype
* @param array $args
*
* @return array
*/
protected function sortArgs($prototype, $args)
{
$keyArgs = [];
$posArgs = [];
// separate positional and keyword arguments
foreach ($args as $arg) {
list($key, $value) = $arg;
$key = $key[1];
if (empty($key)) {
$posArgs[] = $value;
} else {
$keyArgs[$key] = $value;
}
}
if (! isset($prototype)) {
return [$posArgs, $keyArgs];
}
// copy positional args
$finalArgs = array_pad($posArgs, count($prototype), null);
// overwrite positional args with keyword args
foreach ($prototype as $i => $names) {
foreach ((array) $names as $name) {
if (isset($keyArgs[$name])) {
$finalArgs[$i] = $keyArgs[$name];
}
}
}
return [$finalArgs, $keyArgs];
}
/**
* Apply argument values per definition
*
* @param array $argDef
* @param array $argValues
*
* @throws \Exception
*/
protected function applyArguments($argDef, $argValues)
{
$storeEnv = $this->getStoreEnv();
$env = new Environment;
$env->store = $storeEnv->store;
$hasVariable = false;
$args = [];
foreach ($argDef as $i => $arg) {
list($name, $default, $isVariable) = $argDef[$i];
$args[$name] = [$i, $name, $default, $isVariable];
$hasVariable |= $isVariable;
}
$keywordArgs = [];
$deferredKeywordArgs = [];
$remaining = [];
// assign the keyword args
foreach ((array) $argValues as $arg) {
if (! empty($arg[0])) {
if (! isset($args[$arg[0][1]])) {
if ($hasVariable) {
$deferredKeywordArgs[$arg[0][1]] = $arg[1];
} else {
$this->throwError("Mixin or function doesn't have an argument named $%s.", $arg[0][1]);
break;
}
} elseif ($args[$arg[0][1]][0] < count($remaining)) {
$this->throwError("The argument $%s was passed both by position and by name.", $arg[0][1]);
break;
} else {
$keywordArgs[$arg[0][1]] = $arg[1];
}
} elseif (count($keywordArgs)) {
$this->throwError('Positional arguments must come before keyword arguments.');
break;
} elseif ($arg[2] === true) {
$val = $this->reduce($arg[1], true);
if ($val[0] === Type::T_LIST) {
foreach ($val[2] as $name => $item) {
if (! is_numeric($name)) {
$keywordArgs[$name] = $item;
} else {
$remaining[] = $item;
}
}
} elseif ($val[0] === Type::T_MAP) {
foreach ($val[1] as $i => $name) {
$name = $this->compileStringContent($this->coerceString($name));
$item = $val[2][$i];
if (! is_numeric($name)) {
$keywordArgs[$name] = $item;
} else {
$remaining[] = $item;
}
}
} else {
$remaining[] = $val;
}
} else {
$remaining[] = $arg[1];
}
}
foreach ($args as $arg) {
list($i, $name, $default, $isVariable) = $arg;
if ($isVariable) {
$val = [Type::T_LIST, ',', [], $isVariable];
for ($count = count($remaining); $i < $count; $i++) {
$val[2][] = $remaining[$i];
}
foreach ($deferredKeywordArgs as $itemName => $item) {
$val[2][$itemName] = $item;
}
} elseif (isset($remaining[$i])) {
$val = $remaining[$i];
} elseif (isset($keywordArgs[$name])) {
$val = $keywordArgs[$name];
} elseif (! empty($default)) {
continue;
} else {
$this->throwError("Missing argument $name");
break;
}
$this->set($name, $this->reduce($val, true), true, $env);
}
$storeEnv->store = $env->store;
foreach ($args as $arg) {
list($i, $name, $default, $isVariable) = $arg;
if ($isVariable || isset($remaining[$i]) || isset($keywordArgs[$name]) || empty($default)) {
continue;
}
$this->set($name, $this->reduce($default, true), true);
}
}
/**
* Coerce a php value into a scss one
*
* @param mixed $value
*
* @return array|\Leafo\ScssPhp\Node\Number
*/
private function coerceValue($value)
{
if (is_array($value) || $value instanceof \ArrayAccess) {
return $value;
}
if (is_bool($value)) {
return $this->toBool($value);
}
if ($value === null) {
return static::$null;
}
if (is_numeric($value)) {
return new Node\Number($value, '');
}
if ($value === '') {
return static::$emptyString;
}
if (preg_match('/^(#([0-9a-f]{6})|#([0-9a-f]{3}))$/i', $value, $m)) {
$color = [Type::T_COLOR];
if (isset($m[3])) {
$num = hexdec($m[3]);
foreach ([3, 2, 1] as $i) {
$t = $num & 0xf;
$color[$i] = $t << 4 | $t;
$num >>= 4;
}
} else {
$num = hexdec($m[2]);
foreach ([3, 2, 1] as $i) {
$color[$i] = $num & 0xff;
$num >>= 8;
}
}
return $color;
}
return [Type::T_KEYWORD, $value];
}
/**
* Coerce something to map
*
* @param array $item
*
* @return array
*/
protected function coerceMap($item)
{
if ($item[0] === Type::T_MAP) {
return $item;
}
if ($item === static::$emptyList) {
return static::$emptyMap;
}
return [Type::T_MAP, [$item], [static::$null]];
}
/**
* Coerce something to list
*
* @param array $item
* @param string $delim
*
* @return array
*/
protected function coerceList($item, $delim = ',')
{
if (isset($item) && $item[0] === Type::T_LIST) {
return $item;
}
if (isset($item) && $item[0] === Type::T_MAP) {
$keys = $item[1];
$values = $item[2];
$list = [];
for ($i = 0, $s = count($keys); $i < $s; $i++) {
$key = $keys[$i];
$value = $values[$i];
$list[] = [
Type::T_LIST,
'',
[[Type::T_KEYWORD, $this->compileStringContent($this->coerceString($key))], $value]
];
}
return [Type::T_LIST, ',', $list];
}
return [Type::T_LIST, $delim, ! isset($item) ? []: [$item]];
}
/**
* Coerce color for expression
*
* @param array $value
*
* @return array|null
*/
protected function coerceForExpression($value)
{
if ($color = $this->coerceColor($value)) {
return $color;
}
return $value;
}
/**
* Coerce value to color
*
* @param array $value
*
* @return array|null
*/
protected function coerceColor($value)
{
switch ($value[0]) {
case Type::T_COLOR:
return $value;
case Type::T_KEYWORD:
$name = strtolower($value[1]);
if (isset(Colors::$cssColors[$name])) {
$rgba = explode(',', Colors::$cssColors[$name]);
return isset($rgba[3])
? [Type::T_COLOR, (int) $rgba[0], (int) $rgba[1], (int) $rgba[2], (int) $rgba[3]]
: [Type::T_COLOR, (int) $rgba[0], (int) $rgba[1], (int) $rgba[2]];
}
return null;
}
return null;
}
/**
* Coerce value to string
*
* @param array $value
*
* @return array|null
*/
protected function coerceString($value)
{
if ($value[0] === Type::T_STRING) {
return $value;
}
return [Type::T_STRING, '', [$this->compileValue($value)]];
}
/**
* Coerce value to a percentage
*
* @param array $value
*
* @return integer|float
*/
protected function coercePercent($value)
{
if ($value[0] === Type::T_NUMBER) {
if (! empty($value[2]['%'])) {
return $value[1] / 100;
}
return $value[1];
}
return 0;
}
/**
* Assert value is a map
*
* @api
*
* @param array $value
*
* @return array
*
* @throws \Exception
*/
public function assertMap($value)
{
$value = $this->coerceMap($value);
if ($value[0] !== Type::T_MAP) {
$this->throwError('expecting map');
}
return $value;
}
/**
* Assert value is a list
*
* @api
*
* @param array $value
*
* @return array
*
* @throws \Exception
*/
public function assertList($value)
{
if ($value[0] !== Type::T_LIST) {
$this->throwError('expecting list');
}
return $value;
}
/**
* Assert value is a color
*
* @api
*
* @param array $value
*
* @return array
*
* @throws \Exception
*/
public function assertColor($value)
{
if ($color = $this->coerceColor($value)) {
return $color;
}
$this->throwError('expecting color');
}
/**
* Assert value is a number
*
* @api
*
* @param array $value
*
* @return integer|float
*
* @throws \Exception
*/
public function assertNumber($value)
{
if ($value[0] !== Type::T_NUMBER) {
$this->throwError('expecting number');
}
return $value[1];
}
/**
* Make sure a color's components don't go out of bounds
*
* @param array $c
*
* @return array
*/
protected function fixColor($c)
{
foreach ([1, 2, 3] as $i) {
if ($c[$i] < 0) {
$c[$i] = 0;
}
if ($c[$i] > 255) {
$c[$i] = 255;
}
}
return $c;
}
/**
* Convert RGB to HSL
*
* @api
*
* @param integer $red
* @param integer $green
* @param integer $blue
*
* @return array
*/
public function toHSL($red, $green, $blue)
{
$min = min($red, $green, $blue);
$max = max($red, $green, $blue);
$l = $min + $max;
$d = $max - $min;
if ((int) $d === 0) {
$h = $s = 0;
} else {
if ($l < 255) {
$s = $d / $l;
} else {
$s = $d / (510 - $l);
}
if ($red == $max) {
$h = 60 * ($green - $blue) / $d;
} elseif ($green == $max) {
$h = 60 * ($blue - $red) / $d + 120;
} elseif ($blue == $max) {
$h = 60 * ($red - $green) / $d + 240;
}
}
return [Type::T_HSL, fmod($h, 360), $s * 100, $l / 5.1];
}
/**
* Hue to RGB helper
*
* @param float $m1
* @param float $m2
* @param float $h
*
* @return float
*/
private function hueToRGB($m1, $m2, $h)
{
if ($h < 0) {
$h += 1;
} elseif ($h > 1) {
$h -= 1;
}
if ($h * 6 < 1) {
return $m1 + ($m2 - $m1) * $h * 6;
}
if ($h * 2 < 1) {
return $m2;
}
if ($h * 3 < 2) {
return $m1 + ($m2 - $m1) * (2/3 - $h) * 6;
}
return $m1;
}
/**
* Convert HSL to RGB
*
* @api
*
* @param integer $hue H from 0 to 360
* @param integer $saturation S from 0 to 100
* @param integer $lightness L from 0 to 100
*
* @return array
*/
public function toRGB($hue, $saturation, $lightness)
{
if ($hue < 0) {
$hue += 360;
}
$h = $hue / 360;
$s = min(100, max(0, $saturation)) / 100;
$l = min(100, max(0, $lightness)) / 100;
$m2 = $l <= 0.5 ? $l * ($s + 1) : $l + $s - $l * $s;
$m1 = $l * 2 - $m2;
$r = $this->hueToRGB($m1, $m2, $h + 1/3) * 255;
$g = $this->hueToRGB($m1, $m2, $h) * 255;
$b = $this->hueToRGB($m1, $m2, $h - 1/3) * 255;
$out = [Type::T_COLOR, $r, $g, $b];
return $out;
}
// Built in functions
//protected static $libCall = ['name', 'args...'];
protected function libCall($args, $kwargs)
{
$name = $this->compileStringContent($this->coerceString($this->reduce(array_shift($args), true)));
$args = array_map(
function ($a) {
return [null, $a, false];
},
$args
);
if (count($kwargs)) {
foreach ($kwargs as $key => $value) {
$args[] = [[Type::T_VARIABLE, $key], $value, false];
}
}
return $this->reduce([Type::T_FUNCTION_CALL, $name, $args]);
}
protected static $libIf = ['condition', 'if-true', 'if-false'];
protected function libIf($args)
{
list($cond, $t, $f) = $args;
if (! $this->isTruthy($this->reduce($cond, true))) {
return $this->reduce($f, true);
}
return $this->reduce($t, true);
}
protected static $libIndex = ['list', 'value'];
protected function libIndex($args)
{
list($list, $value) = $args;
if ($value[0] === Type::T_MAP) {
return static::$null;
}
if ($list[0] === Type::T_MAP ||
$list[0] === Type::T_STRING ||
$list[0] === Type::T_KEYWORD ||
$list[0] === Type::T_INTERPOLATE
) {
$list = $this->coerceList($list, ' ');
}
if ($list[0] !== Type::T_LIST) {
return static::$null;
}
$values = [];
foreach ($list[2] as $item) {
$values[] = $this->normalizeValue($item);
}
$key = array_search($this->normalizeValue($value), $values);
return false === $key ? static::$null : $key + 1;
}
protected static $libRgb = ['red', 'green', 'blue'];
protected function libRgb($args)
{
list($r, $g, $b) = $args;
return [Type::T_COLOR, $r[1], $g[1], $b[1]];
}
protected static $libRgba = [
['red', 'color'],
'green', 'blue', 'alpha'];
protected function libRgba($args)
{
if ($color = $this->coerceColor($args[0])) {
$num = ! isset($args[1]) ? $args[3] : $args[1];
$alpha = $this->assertNumber($num);
$color[4] = $alpha;
return $color;
}
list($r, $g, $b, $a) = $args;
return [Type::T_COLOR, $r[1], $g[1], $b[1], $a[1]];
}
// helper function for adjust_color, change_color, and scale_color
protected function alterColor($args, $fn)
{
$color = $this->assertColor($args[0]);
foreach ([1, 2, 3, 7] as $i) {
if (isset($args[$i])) {
$val = $this->assertNumber($args[$i]);
$ii = $i === 7 ? 4 : $i; // alpha
$color[$ii] = call_user_func($fn, isset($color[$ii]) ? $color[$ii] : 0, $val, $i);
}
}
if (isset($args[4]) || isset($args[5]) || isset($args[6])) {
$hsl = $this->toHSL($color[1], $color[2], $color[3]);
foreach ([4, 5, 6] as $i) {
if (isset($args[$i])) {
$val = $this->assertNumber($args[$i]);
$hsl[$i - 3] = call_user_func($fn, $hsl[$i - 3], $val, $i);
}
}
$rgb = $this->toRGB($hsl[1], $hsl[2], $hsl[3]);
if (isset($color[4])) {
$rgb[4] = $color[4];
}
$color = $rgb;
}
return $color;
}
protected static $libAdjustColor = [
'color', 'red', 'green', 'blue',
'hue', 'saturation', 'lightness', 'alpha'
];
protected function libAdjustColor($args)
{
return $this->alterColor($args, function ($base, $alter, $i) {
return $base + $alter;
});
}
protected static $libChangeColor = [
'color', 'red', 'green', 'blue',
'hue', 'saturation', 'lightness', 'alpha'
];
protected function libChangeColor($args)
{
return $this->alterColor($args, function ($base, $alter, $i) {
return $alter;
});
}
protected static $libScaleColor = [
'color', 'red', 'green', 'blue',
'hue', 'saturation', 'lightness', 'alpha'
];
protected function libScaleColor($args)
{
return $this->alterColor($args, function ($base, $scale, $i) {
// 1, 2, 3 - rgb
// 4, 5, 6 - hsl
// 7 - a
switch ($i) {
case 1:
case 2:
case 3:
$max = 255;
break;
case 4:
$max = 360;
break;
case 7:
$max = 1;
break;
default:
$max = 100;
}
$scale = $scale / 100;
if ($scale < 0) {
return $base * $scale + $base;
}
return ($max - $base) * $scale + $base;
});
}
protected static $libIeHexStr = ['color'];
protected function libIeHexStr($args)
{
$color = $this->coerceColor($args[0]);
$color[4] = isset($color[4]) ? round(255 * $color[4]) : 255;
return sprintf('#%02X%02X%02X%02X', $color[4], $color[1], $color[2], $color[3]);
}
protected static $libRed = ['color'];
protected function libRed($args)
{
$color = $this->coerceColor($args[0]);
return $color[1];
}
protected static $libGreen = ['color'];
protected function libGreen($args)
{
$color = $this->coerceColor($args[0]);
return $color[2];
}
protected static $libBlue = ['color'];
protected function libBlue($args)
{
$color = $this->coerceColor($args[0]);
return $color[3];
}
protected static $libAlpha = ['color'];
protected function libAlpha($args)
{
if ($color = $this->coerceColor($args[0])) {
return isset($color[4]) ? $color[4] : 1;
}
// this might be the IE function, so return value unchanged
return null;
}
protected static $libOpacity = ['color'];
protected function libOpacity($args)
{
$value = $args[0];
if ($value[0] === Type::T_NUMBER) {
return null;
}
return $this->libAlpha($args);
}
// mix two colors
protected static $libMix = ['color-1', 'color-2', 'weight'];
protected function libMix($args)
{
list($first, $second, $weight) = $args;
$first = $this->assertColor($first);
$second = $this->assertColor($second);
if (! isset($weight)) {
$weight = 0.5;
} else {
$weight = $this->coercePercent($weight);
}
$firstAlpha = isset($first[4]) ? $first[4] : 1;
$secondAlpha = isset($second[4]) ? $second[4] : 1;
$w = $weight * 2 - 1;
$a = $firstAlpha - $secondAlpha;
$w1 = (($w * $a === -1 ? $w : ($w + $a) / (1 + $w * $a)) + 1) / 2.0;
$w2 = 1.0 - $w1;
$new = [Type::T_COLOR,
$w1 * $first[1] + $w2 * $second[1],
$w1 * $first[2] + $w2 * $second[2],
$w1 * $first[3] + $w2 * $second[3],
];
if ($firstAlpha != 1.0 || $secondAlpha != 1.0) {
$new[] = $firstAlpha * $weight + $secondAlpha * ($weight - 1);
}
return $this->fixColor($new);
}
protected static $libHsl = ['hue', 'saturation', 'lightness'];
protected function libHsl($args)
{
list($h, $s, $l) = $args;
return $this->toRGB($h[1], $s[1], $l[1]);
}
protected static $libHsla = ['hue', 'saturation', 'lightness', 'alpha'];
protected function libHsla($args)
{
list($h, $s, $l, $a) = $args;
$color = $this->toRGB($h[1], $s[1], $l[1]);
$color[4] = $a[1];
return $color;
}
protected static $libHue = ['color'];
protected function libHue($args)
{
$color = $this->assertColor($args[0]);
$hsl = $this->toHSL($color[1], $color[2], $color[3]);
return new Node\Number($hsl[1], 'deg');
}
protected static $libSaturation = ['color'];
protected function libSaturation($args)
{
$color = $this->assertColor($args[0]);
$hsl = $this->toHSL($color[1], $color[2], $color[3]);
return new Node\Number($hsl[2], '%');
}
protected static $libLightness = ['color'];
protected function libLightness($args)
{
$color = $this->assertColor($args[0]);
$hsl = $this->toHSL($color[1], $color[2], $color[3]);
return new Node\Number($hsl[3], '%');
}
protected function adjustHsl($color, $idx, $amount)
{
$hsl = $this->toHSL($color[1], $color[2], $color[3]);
$hsl[$idx] += $amount;
$out = $this->toRGB($hsl[1], $hsl[2], $hsl[3]);
if (isset($color[4])) {
$out[4] = $color[4];
}
return $out;
}
protected static $libAdjustHue = ['color', 'degrees'];
protected function libAdjustHue($args)
{
$color = $this->assertColor($args[0]);
$degrees = $this->assertNumber($args[1]);
return $this->adjustHsl($color, 1, $degrees);
}
protected static $libLighten = ['color', 'amount'];
protected function libLighten($args)
{
$color = $this->assertColor($args[0]);
$amount = Util::checkRange('amount', new Range(0, 100), $args[1], '%');
return $this->adjustHsl($color, 3, $amount);
}
protected static $libDarken = ['color', 'amount'];
protected function libDarken($args)
{
$color = $this->assertColor($args[0]);
$amount = Util::checkRange('amount', new Range(0, 100), $args[1], '%');
return $this->adjustHsl($color, 3, -$amount);
}
protected static $libSaturate = ['color', 'amount'];
protected function libSaturate($args)
{
$value = $args[0];
if ($value[0] === Type::T_NUMBER) {
return null;
}
$color = $this->assertColor($value);
$amount = 100 * $this->coercePercent($args[1]);
return $this->adjustHsl($color, 2, $amount);
}
protected static $libDesaturate = ['color', 'amount'];
protected function libDesaturate($args)
{
$color = $this->assertColor($args[0]);
$amount = 100 * $this->coercePercent($args[1]);
return $this->adjustHsl($color, 2, -$amount);
}
protected static $libGrayscale = ['color'];
protected function libGrayscale($args)
{
$value = $args[0];
if ($value[0] === Type::T_NUMBER) {
return null;
}
return $this->adjustHsl($this->assertColor($value), 2, -100);
}
protected static $libComplement = ['color'];
protected function libComplement($args)
{
return $this->adjustHsl($this->assertColor($args[0]), 1, 180);
}
protected static $libInvert = ['color'];
protected function libInvert($args)
{
$value = $args[0];
if ($value[0] === Type::T_NUMBER) {
return null;
}
$color = $this->assertColor($value);
$color[1] = 255 - $color[1];
$color[2] = 255 - $color[2];
$color[3] = 255 - $color[3];
return $color;
}
// increases opacity by amount
protected static $libOpacify = ['color', 'amount'];
protected function libOpacify($args)
{
$color = $this->assertColor($args[0]);
$amount = $this->coercePercent($args[1]);
$color[4] = (isset($color[4]) ? $color[4] : 1) + $amount;
$color[4] = min(1, max(0, $color[4]));
return $color;
}
protected static $libFadeIn = ['color', 'amount'];
protected function libFadeIn($args)
{
return $this->libOpacify($args);
}
// decreases opacity by amount
protected static $libTransparentize = ['color', 'amount'];
protected function libTransparentize($args)
{
$color = $this->assertColor($args[0]);
$amount = $this->coercePercent($args[1]);
$color[4] = (isset($color[4]) ? $color[4] : 1) - $amount;
$color[4] = min(1, max(0, $color[4]));
return $color;
}
protected static $libFadeOut = ['color', 'amount'];
protected function libFadeOut($args)
{
return $this->libTransparentize($args);
}
protected static $libUnquote = ['string'];
protected function libUnquote($args)
{
$str = $args[0];
if ($str[0] === Type::T_STRING) {
$str[1] = '';
}
return $str;
}
protected static $libQuote = ['string'];
protected function libQuote($args)
{
$value = $args[0];
if ($value[0] === Type::T_STRING && ! empty($value[1])) {
return $value;
}
return [Type::T_STRING, '"', [$value]];
}
protected static $libPercentage = ['value'];
protected function libPercentage($args)
{
return new Node\Number($this->coercePercent($args[0]) * 100, '%');
}
protected static $libRound = ['value'];
protected function libRound($args)
{
$num = $args[0];
return new Node\Number(round($num[1]), $num[2]);
}
protected static $libFloor = ['value'];
protected function libFloor($args)
{
$num = $args[0];
return new Node\Number(floor($num[1]), $num[2]);
}
protected static $libCeil = ['value'];
protected function libCeil($args)
{
$num = $args[0];
return new Node\Number(ceil($num[1]), $num[2]);
}
protected static $libAbs = ['value'];
protected function libAbs($args)
{
$num = $args[0];
return new Node\Number(abs($num[1]), $num[2]);
}
protected function libMin($args)
{
$numbers = $this->getNormalizedNumbers($args);
$min = null;
foreach ($numbers as $key => $number) {
if (null === $min || $number[1] <= $min[1]) {
$min = [$key, $number[1]];
}
}
return $args[$min[0]];
}
protected function libMax($args)
{
$numbers = $this->getNormalizedNumbers($args);
$max = null;
foreach ($numbers as $key => $number) {
if (null === $max || $number[1] >= $max[1]) {
$max = [$key, $number[1]];
}
}
return $args[$max[0]];
}
/**
* Helper to normalize args containing numbers
*
* @param array $args
*
* @return array
*/
protected function getNormalizedNumbers($args)
{
$unit = null;
$originalUnit = null;
$numbers = [];
foreach ($args as $key => $item) {
if ($item[0] !== Type::T_NUMBER) {
$this->throwError('%s is not a number', $item[0]);
break;
}
$number = $item->normalize();
if (null === $unit) {
$unit = $number[2];
$originalUnit = $item->unitStr();
} elseif ($unit !== $number[2]) {
$this->throwError('Incompatible units: "%s" and "%s".', $originalUnit, $item->unitStr());
break;
}
$numbers[$key] = $number;
}
return $numbers;
}
protected static $libLength = ['list'];
protected function libLength($args)
{
$list = $this->coerceList($args[0]);
return count($list[2]);
}
//protected static $libListSeparator = ['list...'];
protected function libListSeparator($args)
{
if (count($args) > 1) {
return 'comma';
}
$list = $this->coerceList($args[0]);
if (count($list[2]) <= 1) {
return 'space';
}
if ($list[1] === ',') {
return 'comma';
}
return 'space';
}
protected static $libNth = ['list', 'n'];
protected function libNth($args)
{
$list = $this->coerceList($args[0]);
$n = $this->assertNumber($args[1]);
if ($n > 0) {
$n--;
} elseif ($n < 0) {
$n += count($list[2]);
}
return isset($list[2][$n]) ? $list[2][$n] : static::$defaultValue;
}
protected static $libSetNth = ['list', 'n', 'value'];
protected function libSetNth($args)
{
$list = $this->coerceList($args[0]);
$n = $this->assertNumber($args[1]);
if ($n > 0) {
$n--;
} elseif ($n < 0) {
$n += count($list[2]);
}
if (! isset($list[2][$n])) {
$this->throwError('Invalid argument for "n"');
return;
}
$list[2][$n] = $args[2];
return $list;
}
protected static $libMapGet = ['map', 'key'];
protected function libMapGet($args)
{
$map = $this->assertMap($args[0]);
$key = $this->compileStringContent($this->coerceString($args[1]));
for ($i = count($map[1]) - 1; $i >= 0; $i--) {
if ($key === $this->compileStringContent($this->coerceString($map[1][$i]))) {
return $map[2][$i];
}
}
return static::$null;
}
protected static $libMapKeys = ['map'];
protected function libMapKeys($args)
{
$map = $this->assertMap($args[0]);
$keys = $map[1];
return [Type::T_LIST, ',', $keys];
}
protected static $libMapValues = ['map'];
protected function libMapValues($args)
{
$map = $this->assertMap($args[0]);
$values = $map[2];
return [Type::T_LIST, ',', $values];
}
protected static $libMapRemove = ['map', 'key'];
protected function libMapRemove($args)
{
$map = $this->assertMap($args[0]);
$key = $this->compileStringContent($this->coerceString($args[1]));
for ($i = count($map[1]) - 1; $i >= 0; $i--) {
if ($key === $this->compileStringContent($this->coerceString($map[1][$i]))) {
array_splice($map[1], $i, 1);
array_splice($map[2], $i, 1);
}
}
return $map;
}
protected static $libMapHasKey = ['map', 'key'];
protected function libMapHasKey($args)
{
$map = $this->assertMap($args[0]);
$key = $this->compileStringContent($this->coerceString($args[1]));
for ($i = count($map[1]) - 1; $i >= 0; $i--) {
if ($key === $this->compileStringContent($this->coerceString($map[1][$i]))) {
return true;
}
}
return false;
}
protected static $libMapMerge = ['map-1', 'map-2'];
protected function libMapMerge($args)
{
$map1 = $this->assertMap($args[0]);
$map2 = $this->assertMap($args[1]);
return [Type::T_MAP, array_merge($map1[1], $map2[1]), array_merge($map1[2], $map2[2])];
}
protected static $libKeywords = ['args'];
protected function libKeywords($args)
{
$this->assertList($args[0]);
$keys = [];
$values = [];
foreach ($args[0][2] as $name => $arg) {
$keys[] = [Type::T_KEYWORD, $name];
$values[] = $arg;
}
return [Type::T_MAP, $keys, $values];
}
protected function listSeparatorForJoin($list1, $sep)
{
if (! isset($sep)) {
return $list1[1];
}
switch ($this->compileValue($sep)) {
case 'comma':
return ',';
case 'space':
return '';
default:
return $list1[1];
}
}
protected static $libJoin = ['list1', 'list2', 'separator'];
protected function libJoin($args)
{
list($list1, $list2, $sep) = $args;
$list1 = $this->coerceList($list1, ' ');
$list2 = $this->coerceList($list2, ' ');
$sep = $this->listSeparatorForJoin($list1, $sep);
return [Type::T_LIST, $sep, array_merge($list1[2], $list2[2])];
}
protected static $libAppend = ['list', 'val', 'separator'];
protected function libAppend($args)
{
list($list1, $value, $sep) = $args;
$list1 = $this->coerceList($list1, ' ');
$sep = $this->listSeparatorForJoin($list1, $sep);
return [Type::T_LIST, $sep, array_merge($list1[2], [$value])];
}
protected function libZip($args)
{
foreach ($args as $arg) {
$this->assertList($arg);
}
$lists = [];
$firstList = array_shift($args);
foreach ($firstList[2] as $key => $item) {
$list = [Type::T_LIST, '', [$item]];
foreach ($args as $arg) {
if (isset($arg[2][$key])) {
$list[2][] = $arg[2][$key];
} else {
break 2;
}
}
$lists[] = $list;
}
return [Type::T_LIST, ',', $lists];
}
protected static $libTypeOf = ['value'];
protected function libTypeOf($args)
{
$value = $args[0];
switch ($value[0]) {
case Type::T_KEYWORD:
if ($value === static::$true || $value === static::$false) {
return 'bool';
}
if ($this->coerceColor($value)) {
return 'color';
}
// fall-thru
case Type::T_FUNCTION:
return 'string';
case Type::T_LIST:
if (isset($value[3]) && $value[3]) {
return 'arglist';
}
// fall-thru
default:
return $value[0];
}
}
protected static $libUnit = ['number'];
protected function libUnit($args)
{
$num = $args[0];
if ($num[0] === Type::T_NUMBER) {
return [Type::T_STRING, '"', [$num->unitStr()]];
}
return '';
}
protected static $libUnitless = ['number'];
protected function libUnitless($args)
{
$value = $args[0];
return $value[0] === Type::T_NUMBER && $value->unitless();
}
protected static $libComparable = ['number-1', 'number-2'];
protected function libComparable($args)
{
list($number1, $number2) = $args;
if (! isset($number1[0]) || $number1[0] !== Type::T_NUMBER ||
! isset($number2[0]) || $number2[0] !== Type::T_NUMBER
) {
$this->throwError('Invalid argument(s) for "comparable"');
return;
}
$number1 = $number1->normalize();
$number2 = $number2->normalize();
return $number1[2] === $number2[2] || $number1->unitless() || $number2->unitless();
}
protected static $libStrIndex = ['string', 'substring'];
protected function libStrIndex($args)
{
$string = $this->coerceString($args[0]);
$stringContent = $this->compileStringContent($string);
$substring = $this->coerceString($args[1]);
$substringContent = $this->compileStringContent($substring);
$result = strpos($stringContent, $substringContent);
return $result === false ? static::$null : new Node\Number($result + 1, '');
}
protected static $libStrInsert = ['string', 'insert', 'index'];
protected function libStrInsert($args)
{
$string = $this->coerceString($args[0]);
$stringContent = $this->compileStringContent($string);
$insert = $this->coerceString($args[1]);
$insertContent = $this->compileStringContent($insert);
list(, $index) = $args[2];
$string[2] = [substr_replace($stringContent, $insertContent, $index - 1, 0)];
return $string;
}
protected static $libStrLength = ['string'];
protected function libStrLength($args)
{
$string = $this->coerceString($args[0]);
$stringContent = $this->compileStringContent($string);
return new Node\Number(strlen($stringContent), '');
}
protected static $libStrSlice = ['string', 'start-at', 'end-at'];
protected function libStrSlice($args)
{
if (isset($args[2]) && $args[2][1] == 0) {
return static::$nullString;
}
$string = $this->coerceString($args[0]);
$stringContent = $this->compileStringContent($string);
$start = (int) $args[1][1];
if ($start > 0) {
$start--;
}
$end = (int) $args[2][1];
$length = $end < 0 ? $end + 1 : ($end > 0 ? $end - $start : $end);
$string[2] = $length
? [substr($stringContent, $start, $length)]
: [substr($stringContent, $start)];
return $string;
}
protected static $libToLowerCase = ['string'];
protected function libToLowerCase($args)
{
$string = $this->coerceString($args[0]);
$stringContent = $this->compileStringContent($string);
$string[2] = [function_exists('mb_strtolower') ? mb_strtolower($stringContent) : strtolower($stringContent)];
return $string;
}
protected static $libToUpperCase = ['string'];
protected function libToUpperCase($args)
{
$string = $this->coerceString($args[0]);
$stringContent = $this->compileStringContent($string);
$string[2] = [function_exists('mb_strtoupper') ? mb_strtoupper($stringContent) : strtoupper($stringContent)];
return $string;
}
protected static $libFeatureExists = ['feature'];
protected function libFeatureExists($args)
{
$string = $this->coerceString($args[0]);
$name = $this->compileStringContent($string);
return $this->toBool(
array_key_exists($name, $this->registeredFeatures) ? $this->registeredFeatures[$name] : false
);
}
protected static $libFunctionExists = ['name'];
protected function libFunctionExists($args)
{
$string = $this->coerceString($args[0]);
$name = $this->compileStringContent($string);
// user defined functions
if ($this->has(static::$namespaces['function'] . $name)) {
return true;
}
$name = $this->normalizeName($name);
if (isset($this->userFunctions[$name])) {
return true;
}
// built-in functions
$f = $this->getBuiltinFunction($name);
return $this->toBool(is_callable($f));
}
protected static $libGlobalVariableExists = ['name'];
protected function libGlobalVariableExists($args)
{
$string = $this->coerceString($args[0]);
$name = $this->compileStringContent($string);
return $this->has($name, $this->rootEnv);
}
protected static $libMixinExists = ['name'];
protected function libMixinExists($args)
{
$string = $this->coerceString($args[0]);
$name = $this->compileStringContent($string);
return $this->has(static::$namespaces['mixin'] . $name);
}
protected static $libVariableExists = ['name'];
protected function libVariableExists($args)
{
$string = $this->coerceString($args[0]);
$name = $this->compileStringContent($string);
return $this->has($name);
}
/**
* Workaround IE7's content counter bug.
*
* @param array $args
*
* @return array
*/
protected function libCounter($args)
{
$list = array_map([$this, 'compileValue'], $args);
return [Type::T_STRING, '', ['counter(' . implode(',', $list) . ')']];
}
protected static $libRandom = ['limit'];
protected function libRandom($args)
{
if (isset($args[0])) {
$n = $this->assertNumber($args[0]);
if ($n < 1) {
$this->throwError("limit must be greater than or equal to 1");
return;
}
return new Node\Number(mt_rand(1, $n), '');
}
return new Node\Number(mt_rand(1, mt_getrandmax()), '');
}
protected function libUniqueId()
{
static $id;
if (! isset($id)) {
$id = mt_rand(0, pow(36, 8));
}
$id += mt_rand(0, 10) + 1;
return [Type::T_STRING, '', ['u' . str_pad(base_convert($id, 10, 36), 8, '0', STR_PAD_LEFT)]];
}
protected static $libInspect = ['value'];
protected function libInspect($args)
{
if ($args[0] === static::$null) {
return [Type::T_KEYWORD, 'null'];
}
return $args[0];
}
}
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