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-rw-r--r--lib/less.php/Tree/Media.php179
1 files changed, 179 insertions, 0 deletions
diff --git a/lib/less.php/Tree/Media.php b/lib/less.php/Tree/Media.php
new file mode 100644
index 0000000..f9ee9d4
--- /dev/null
+++ b/lib/less.php/Tree/Media.php
@@ -0,0 +1,179 @@
+<?php
+
+/**
+ * Media
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Media extends Less_Tree{
+
+ public $features;
+ public $rules;
+ public $index;
+ public $currentFileInfo;
+ public $isReferenced;
+ public $type = 'Media';
+
+ public function __construct($value = array(), $features = array(), $index = null, $currentFileInfo = null ){
+
+ $this->index = $index;
+ $this->currentFileInfo = $currentFileInfo;
+
+ $selectors = $this->emptySelectors();
+
+ $this->features = new Less_Tree_Value($features);
+
+ $this->rules = array(new Less_Tree_Ruleset($selectors, $value));
+ $this->rules[0]->allowImports = true;
+ }
+
+ public function accept( $visitor ){
+ $this->features = $visitor->visitObj($this->features);
+ $this->rules = $visitor->visitArray($this->rules);
+ }
+
+ /**
+ * @see Less_Tree::genCSS
+ */
+ public function genCSS( $output ){
+
+ $output->add( '@media ', $this->currentFileInfo, $this->index );
+ $this->features->genCSS( $output );
+ Less_Tree::outputRuleset( $output, $this->rules);
+
+ }
+
+ public function compile($env) {
+
+ $media = new Less_Tree_Media(array(), array(), $this->index, $this->currentFileInfo );
+
+ $strictMathBypass = false;
+ if( Less_Parser::$options['strictMath'] === false) {
+ $strictMathBypass = true;
+ Less_Parser::$options['strictMath'] = true;
+ }
+
+ $media->features = $this->features->compile($env);
+
+ if( $strictMathBypass ){
+ Less_Parser::$options['strictMath'] = false;
+ }
+
+ $env->mediaPath[] = $media;
+ $env->mediaBlocks[] = $media;
+
+ array_unshift($env->frames, $this->rules[0]);
+ $media->rules = array($this->rules[0]->compile($env));
+ array_shift($env->frames);
+
+ array_pop($env->mediaPath);
+
+ return !$env->mediaPath ? $media->compileTop($env) : $media->compileNested($env);
+ }
+
+ public function variable($name) {
+ return $this->rules[0]->variable($name);
+ }
+
+ public function find($selector) {
+ return $this->rules[0]->find($selector, $this);
+ }
+
+ public function emptySelectors(){
+ $el = new Less_Tree_Element('','&', $this->index, $this->currentFileInfo );
+ $sels = array( new Less_Tree_Selector(array($el), array(), null, $this->index, $this->currentFileInfo) );
+ $sels[0]->mediaEmpty = true;
+ return $sels;
+ }
+
+ public function markReferenced(){
+ $this->rules[0]->markReferenced();
+ $this->isReferenced = true;
+ Less_Tree::ReferencedArray($this->rules[0]->rules);
+ }
+
+ // evaltop
+ public function compileTop($env) {
+ $result = $this;
+
+ if (count($env->mediaBlocks) > 1) {
+ $selectors = $this->emptySelectors();
+ $result = new Less_Tree_Ruleset($selectors, $env->mediaBlocks);
+ $result->multiMedia = true;
+ }
+
+ $env->mediaBlocks = array();
+ $env->mediaPath = array();
+
+ return $result;
+ }
+
+ public function compileNested($env) {
+ $path = array_merge($env->mediaPath, array($this));
+
+ // Extract the media-query conditions separated with `,` (OR).
+ foreach ($path as $key => $p) {
+ $value = $p->features instanceof Less_Tree_Value ? $p->features->value : $p->features;
+ $path[$key] = is_array($value) ? $value : array($value);
+ }
+
+ // Trace all permutations to generate the resulting media-query.
+ //
+ // (a, b and c) with nested (d, e) ->
+ // a and d
+ // a and e
+ // b and c and d
+ // b and c and e
+
+ $permuted = $this->permute($path);
+ $expressions = array();
+ foreach($permuted as $path){
+
+ for( $i=0, $len=count($path); $i < $len; $i++){
+ $path[$i] = Less_Parser::is_method($path[$i], 'toCSS') ? $path[$i] : new Less_Tree_Anonymous($path[$i]);
+ }
+
+ for( $i = count($path) - 1; $i > 0; $i-- ){
+ array_splice($path, $i, 0, array(new Less_Tree_Anonymous('and')));
+ }
+
+ $expressions[] = new Less_Tree_Expression($path);
+ }
+ $this->features = new Less_Tree_Value($expressions);
+
+
+
+ // Fake a tree-node that doesn't output anything.
+ return new Less_Tree_Ruleset(array(), array());
+ }
+
+ public function permute($arr) {
+ if (!$arr)
+ return array();
+
+ if (count($arr) == 1)
+ return $arr[0];
+
+ $result = array();
+ $rest = $this->permute(array_slice($arr, 1));
+ foreach ($rest as $r) {
+ foreach ($arr[0] as $a) {
+ $result[] = array_merge(
+ is_array($a) ? $a : array($a),
+ is_array($r) ? $r : array($r)
+ );
+ }
+ }
+
+ return $result;
+ }
+
+ public function bubbleSelectors($selectors) {
+
+ if( !$selectors) return;
+
+ $this->rules = array(new Less_Tree_Ruleset( $selectors, array($this->rules[0])));
+ }
+
+}