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-rw-r--r--lib/less.php/SourceMap/Base64VLQ.php187
-rw-r--r--lib/less.php/SourceMap/Generator.php365
2 files changed, 552 insertions, 0 deletions
diff --git a/lib/less.php/SourceMap/Base64VLQ.php b/lib/less.php/SourceMap/Base64VLQ.php
new file mode 100644
index 0000000..f5b200c
--- /dev/null
+++ b/lib/less.php/SourceMap/Base64VLQ.php
@@ -0,0 +1,187 @@
+<?php
+
+/**
+ * Encode / Decode Base64 VLQ.
+ *
+ * @package Less
+ * @subpackage SourceMap
+ */
+class Less_SourceMap_Base64VLQ {
+
+ /**
+ * Shift
+ *
+ * @var integer
+ */
+ private $shift = 5;
+
+ /**
+ * Mask
+ *
+ * @var integer
+ */
+ private $mask = 0x1F; // == (1 << shift) == 0b00011111
+
+ /**
+ * Continuation bit
+ *
+ * @var integer
+ */
+ private $continuationBit = 0x20; // == (mask - 1 ) == 0b00100000
+
+ /**
+ * Char to integer map
+ *
+ * @var array
+ */
+ private $charToIntMap = array(
+ 'A' => 0, 'B' => 1, 'C' => 2, 'D' => 3, 'E' => 4, 'F' => 5, 'G' => 6,
+ 'H' => 7,'I' => 8, 'J' => 9, 'K' => 10, 'L' => 11, 'M' => 12, 'N' => 13,
+ 'O' => 14, 'P' => 15, 'Q' => 16, 'R' => 17, 'S' => 18, 'T' => 19, 'U' => 20,
+ 'V' => 21, 'W' => 22, 'X' => 23, 'Y' => 24, 'Z' => 25, 'a' => 26, 'b' => 27,
+ 'c' => 28, 'd' => 29, 'e' => 30, 'f' => 31, 'g' => 32, 'h' => 33, 'i' => 34,
+ 'j' => 35, 'k' => 36, 'l' => 37, 'm' => 38, 'n' => 39, 'o' => 40, 'p' => 41,
+ 'q' => 42, 'r' => 43, 's' => 44, 't' => 45, 'u' => 46, 'v' => 47, 'w' => 48,
+ 'x' => 49, 'y' => 50, 'z' => 51, 0 => 52, 1 => 53, 2 => 54, 3 => 55, 4 => 56,
+ 5 => 57, 6 => 58, 7 => 59, 8 => 60, 9 => 61, '+' => 62, '/' => 63,
+ );
+
+ /**
+ * Integer to char map
+ *
+ * @var array
+ */
+ private $intToCharMap = array(
+ 0 => 'A', 1 => 'B', 2 => 'C', 3 => 'D', 4 => 'E', 5 => 'F', 6 => 'G',
+ 7 => 'H', 8 => 'I', 9 => 'J', 10 => 'K', 11 => 'L', 12 => 'M', 13 => 'N',
+ 14 => 'O', 15 => 'P', 16 => 'Q', 17 => 'R', 18 => 'S', 19 => 'T', 20 => 'U',
+ 21 => 'V', 22 => 'W', 23 => 'X', 24 => 'Y', 25 => 'Z', 26 => 'a', 27 => 'b',
+ 28 => 'c', 29 => 'd', 30 => 'e', 31 => 'f', 32 => 'g', 33 => 'h', 34 => 'i',
+ 35 => 'j', 36 => 'k', 37 => 'l', 38 => 'm', 39 => 'n', 40 => 'o', 41 => 'p',
+ 42 => 'q', 43 => 'r', 44 => 's', 45 => 't', 46 => 'u', 47 => 'v', 48 => 'w',
+ 49 => 'x', 50 => 'y', 51 => 'z', 52 => '0', 53 => '1', 54 => '2', 55 => '3',
+ 56 => '4', 57 => '5', 58 => '6', 59 => '7', 60 => '8', 61 => '9', 62 => '+',
+ 63 => '/',
+ );
+
+ /**
+ * Constructor
+ */
+ public function __construct(){
+ // I leave it here for future reference
+ // foreach(str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/') as $i => $char)
+ // {
+ // $this->charToIntMap[$char] = $i;
+ // $this->intToCharMap[$i] = $char;
+ // }
+ }
+
+ /**
+ * Convert from a two-complement value to a value where the sign bit is
+ * is placed in the least significant bit. For example, as decimals:
+ * 1 becomes 2 (10 binary), -1 becomes 3 (11 binary)
+ * 2 becomes 4 (100 binary), -2 becomes 5 (101 binary)
+ * We generate the value for 32 bit machines, hence -2147483648 becomes 1, not 4294967297,
+ * even on a 64 bit machine.
+ * @param string $aValue
+ */
+ public function toVLQSigned($aValue){
+ return 0xffffffff & ($aValue < 0 ? ((-$aValue) << 1) + 1 : ($aValue << 1) + 0);
+ }
+
+ /**
+ * Convert to a two-complement value from a value where the sign bit is
+ * is placed in the least significant bit. For example, as decimals:
+ * 2 (10 binary) becomes 1, 3 (11 binary) becomes -1
+ * 4 (100 binary) becomes 2, 5 (101 binary) becomes -2
+ * We assume that the value was generated with a 32 bit machine in mind.
+ * Hence
+ * 1 becomes -2147483648
+ * even on a 64 bit machine.
+ * @param integer $aValue
+ */
+ public function fromVLQSigned($aValue){
+ return $aValue & 1 ? $this->zeroFill(~$aValue + 2, 1) | (-1 - 0x7fffffff) : $this->zeroFill($aValue, 1);
+ }
+
+ /**
+ * Return the base 64 VLQ encoded value.
+ *
+ * @param string $aValue The value to encode
+ * @return string The encoded value
+ */
+ public function encode($aValue){
+ $encoded = '';
+ $vlq = $this->toVLQSigned($aValue);
+ do
+ {
+ $digit = $vlq & $this->mask;
+ $vlq = $this->zeroFill($vlq, $this->shift);
+ if($vlq > 0){
+ $digit |= $this->continuationBit;
+ }
+ $encoded .= $this->base64Encode($digit);
+ } while($vlq > 0);
+
+ return $encoded;
+ }
+
+ /**
+ * Return the value decoded from base 64 VLQ.
+ *
+ * @param string $encoded The encoded value to decode
+ * @return integer The decoded value
+ */
+ public function decode($encoded){
+ $vlq = 0;
+ $i = 0;
+ do
+ {
+ $digit = $this->base64Decode($encoded[$i]);
+ $vlq |= ($digit & $this->mask) << ($i * $this->shift);
+ $i++;
+ } while($digit & $this->continuationBit);
+
+ return $this->fromVLQSigned($vlq);
+ }
+
+ /**
+ * Right shift with zero fill.
+ *
+ * @param integer $a number to shift
+ * @param integer $b number of bits to shift
+ * @return integer
+ */
+ public function zeroFill($a, $b){
+ return ($a >= 0) ? ($a >> $b) : ($a >> $b) & (PHP_INT_MAX >> ($b - 1));
+ }
+
+ /**
+ * Encode single 6-bit digit as base64.
+ *
+ * @param integer $number
+ * @return string
+ * @throws Exception If the number is invalid
+ */
+ public function base64Encode($number){
+ if($number < 0 || $number > 63){
+ throw new Exception(sprintf('Invalid number "%s" given. Must be between 0 and 63.', $number));
+ }
+ return $this->intToCharMap[$number];
+ }
+
+ /**
+ * Decode single 6-bit digit from base64
+ *
+ * @param string $char
+ * @return number
+ * @throws Exception If the number is invalid
+ */
+ public function base64Decode($char){
+ if(!array_key_exists($char, $this->charToIntMap)){
+ throw new Exception(sprintf('Invalid base 64 digit "%s" given.', $char));
+ }
+ return $this->charToIntMap[$char];
+ }
+
+}
diff --git a/lib/less.php/SourceMap/Generator.php b/lib/less.php/SourceMap/Generator.php
new file mode 100644
index 0000000..cc9e65f
--- /dev/null
+++ b/lib/less.php/SourceMap/Generator.php
@@ -0,0 +1,365 @@
+<?php
+
+/**
+ * Source map generator
+ *
+ * @package Less
+ * @subpackage Output
+ */
+class Less_SourceMap_Generator extends Less_Configurable {
+
+ /**
+ * What version of source map does the generator generate?
+ */
+ const VERSION = 3;
+
+ /**
+ * Array of default options
+ *
+ * @var array
+ */
+ protected $defaultOptions = array(
+ // an optional source root, useful for relocating source files
+ // on a server or removing repeated values in the 'sources' entry.
+ // This value is prepended to the individual entries in the 'source' field.
+ 'sourceRoot' => '',
+
+ // an optional name of the generated code that this source map is associated with.
+ 'sourceMapFilename' => null,
+
+ // url of the map
+ 'sourceMapURL' => null,
+
+ // absolute path to a file to write the map to
+ 'sourceMapWriteTo' => null,
+
+ // output source contents?
+ 'outputSourceFiles' => false,
+
+ // base path for filename normalization
+ 'sourceMapRootpath' => '',
+
+ // base path for filename normalization
+ 'sourceMapBasepath' => ''
+ );
+
+ /**
+ * The base64 VLQ encoder
+ *
+ * @var Less_SourceMap_Base64VLQ
+ */
+ protected $encoder;
+
+ /**
+ * Array of mappings
+ *
+ * @var array
+ */
+ protected $mappings = array();
+
+ /**
+ * The root node
+ *
+ * @var Less_Tree_Ruleset
+ */
+ protected $root;
+
+ /**
+ * Array of contents map
+ *
+ * @var array
+ */
+ protected $contentsMap = array();
+
+ /**
+ * File to content map
+ *
+ * @var array
+ */
+ protected $sources = array();
+ protected $source_keys = array();
+
+ /**
+ * Constructor
+ *
+ * @param Less_Tree_Ruleset $root The root node
+ * @param array $options Array of options
+ */
+ public function __construct(Less_Tree_Ruleset $root, $contentsMap, $options = array()){
+ $this->root = $root;
+ $this->contentsMap = $contentsMap;
+ $this->encoder = new Less_SourceMap_Base64VLQ();
+
+ $this->SetOptions($options);
+
+ $this->options['sourceMapRootpath'] = $this->fixWindowsPath($this->options['sourceMapRootpath'], true);
+ $this->options['sourceMapBasepath'] = $this->fixWindowsPath($this->options['sourceMapBasepath'], true);
+ }
+
+ /**
+ * Generates the CSS
+ *
+ * @return string
+ */
+ public function generateCSS(){
+ $output = new Less_Output_Mapped($this->contentsMap, $this);
+
+ // catch the output
+ $this->root->genCSS($output);
+
+
+ $sourceMapUrl = $this->getOption('sourceMapURL');
+ $sourceMapFilename = $this->getOption('sourceMapFilename');
+ $sourceMapContent = $this->generateJson();
+ $sourceMapWriteTo = $this->getOption('sourceMapWriteTo');
+
+ if( !$sourceMapUrl && $sourceMapFilename ){
+ $sourceMapUrl = $this->normalizeFilename($sourceMapFilename);
+ }
+
+ // write map to a file
+ if( $sourceMapWriteTo ){
+ $this->saveMap($sourceMapWriteTo, $sourceMapContent);
+ }
+
+ // inline the map
+ if( !$sourceMapUrl ){
+ $sourceMapUrl = sprintf('data:application/json,%s', Less_Functions::encodeURIComponent($sourceMapContent));
+ }
+
+ if( $sourceMapUrl ){
+ $output->add( sprintf('/*# sourceMappingURL=%s */', $sourceMapUrl) );
+ }
+
+ return $output->toString();
+ }
+
+ /**
+ * Saves the source map to a file
+ *
+ * @param string $file The absolute path to a file
+ * @param string $content The content to write
+ * @throws Exception If the file could not be saved
+ */
+ protected function saveMap($file, $content){
+ $dir = dirname($file);
+ // directory does not exist
+ if( !is_dir($dir) ){
+ // FIXME: create the dir automatically?
+ throw new Exception(sprintf('The directory "%s" does not exist. Cannot save the source map.', $dir));
+ }
+ // FIXME: proper saving, with dir write check!
+ if(file_put_contents($file, $content) === false){
+ throw new Exception(sprintf('Cannot save the source map to "%s"', $file));
+ }
+ return true;
+ }
+
+ /**
+ * Normalizes the filename
+ *
+ * @param string $filename
+ * @return string
+ */
+ protected function normalizeFilename($filename){
+
+ $filename = $this->fixWindowsPath($filename);
+
+ $rootpath = $this->getOption('sourceMapRootpath');
+ $basePath = $this->getOption('sourceMapBasepath');
+
+ // "Trim" the 'sourceMapBasepath' from the output filename.
+ if (strpos($filename, $basePath) === 0) {
+ $filename = substr($filename, strlen($basePath));
+ }
+
+ // Remove extra leading path separators.
+ if(strpos($filename, '\\') === 0 || strpos($filename, '/') === 0){
+ $filename = substr($filename, 1);
+ }
+
+ return $rootpath . $filename;
+ }
+
+ /**
+ * Adds a mapping
+ *
+ * @param integer $generatedLine The line number in generated file
+ * @param integer $generatedColumn The column number in generated file
+ * @param integer $originalLine The line number in original file
+ * @param integer $originalColumn The column number in original file
+ * @param string $sourceFile The original source file
+ */
+ public function addMapping($generatedLine, $generatedColumn, $originalLine, $originalColumn, $fileInfo ){
+
+ $this->mappings[] = array(
+ 'generated_line' => $generatedLine,
+ 'generated_column' => $generatedColumn,
+ 'original_line' => $originalLine,
+ 'original_column' => $originalColumn,
+ 'source_file' => $fileInfo['currentUri']
+ );
+
+ $this->sources[$fileInfo['currentUri']] = $fileInfo['filename'];
+ }
+
+
+ /**
+ * Generates the JSON source map
+ *
+ * @return string
+ * @see https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#
+ */
+ protected function generateJson(){
+
+ $sourceMap = array();
+ $mappings = $this->generateMappings();
+
+ // File version (always the first entry in the object) and must be a positive integer.
+ $sourceMap['version'] = self::VERSION;
+
+
+ // An optional name of the generated code that this source map is associated with.
+ $file = $this->getOption('sourceMapFilename');
+ if( $file ){
+ $sourceMap['file'] = $file;
+ }
+
+
+ // An optional source root, useful for relocating source files on a server or removing repeated values in the 'sources' entry. This value is prepended to the individual entries in the 'source' field.
+ $root = $this->getOption('sourceRoot');
+ if( $root ){
+ $sourceMap['sourceRoot'] = $root;
+ }
+
+
+ // A list of original sources used by the 'mappings' entry.
+ $sourceMap['sources'] = array();
+ foreach($this->sources as $source_uri => $source_filename){
+ $sourceMap['sources'][] = $this->normalizeFilename($source_filename);
+ }
+
+
+ // A list of symbol names used by the 'mappings' entry.
+ $sourceMap['names'] = array();
+
+ // A string with the encoded mapping data.
+ $sourceMap['mappings'] = $mappings;
+
+ if( $this->getOption('outputSourceFiles') ){
+ // An optional list of source content, useful when the 'source' can't be hosted.
+ // The contents are listed in the same order as the sources above.
+ // 'null' may be used if some original sources should be retrieved by name.
+ $sourceMap['sourcesContent'] = $this->getSourcesContent();
+ }
+
+ // less.js compat fixes
+ if( count($sourceMap['sources']) && empty($sourceMap['sourceRoot']) ){
+ unset($sourceMap['sourceRoot']);
+ }
+
+ return json_encode($sourceMap);
+ }
+
+ /**
+ * Returns the sources contents
+ *
+ * @return array|null
+ */
+ protected function getSourcesContent(){
+ if(empty($this->sources)){
+ return;
+ }
+ $content = array();
+ foreach($this->sources as $sourceFile){
+ $content[] = file_get_contents($sourceFile);
+ }
+ return $content;
+ }
+
+ /**
+ * Generates the mappings string
+ *
+ * @return string
+ */
+ public function generateMappings(){
+
+ if( !count($this->mappings) ){
+ return '';
+ }
+
+ $this->source_keys = array_flip(array_keys($this->sources));
+
+
+ // group mappings by generated line number.
+ $groupedMap = $groupedMapEncoded = array();
+ foreach($this->mappings as $m){
+ $groupedMap[$m['generated_line']][] = $m;
+ }
+ ksort($groupedMap);
+
+ $lastGeneratedLine = $lastOriginalIndex = $lastOriginalLine = $lastOriginalColumn = 0;
+
+ foreach($groupedMap as $lineNumber => $line_map){
+ while(++$lastGeneratedLine < $lineNumber){
+ $groupedMapEncoded[] = ';';
+ }
+
+ $lineMapEncoded = array();
+ $lastGeneratedColumn = 0;
+
+ foreach($line_map as $m){
+ $mapEncoded = $this->encoder->encode($m['generated_column'] - $lastGeneratedColumn);
+ $lastGeneratedColumn = $m['generated_column'];
+
+ // find the index
+ if( $m['source_file'] ){
+ $index = $this->findFileIndex($m['source_file']);
+ if( $index !== false ){
+ $mapEncoded .= $this->encoder->encode($index - $lastOriginalIndex);
+ $lastOriginalIndex = $index;
+
+ // lines are stored 0-based in SourceMap spec version 3
+ $mapEncoded .= $this->encoder->encode($m['original_line'] - 1 - $lastOriginalLine);
+ $lastOriginalLine = $m['original_line'] - 1;
+
+ $mapEncoded .= $this->encoder->encode($m['original_column'] - $lastOriginalColumn);
+ $lastOriginalColumn = $m['original_column'];
+ }
+ }
+
+ $lineMapEncoded[] = $mapEncoded;
+ }
+
+ $groupedMapEncoded[] = implode(',', $lineMapEncoded) . ';';
+ }
+
+ return rtrim(implode($groupedMapEncoded), ';');
+ }
+
+ /**
+ * Finds the index for the filename
+ *
+ * @param string $filename
+ * @return integer|false
+ */
+ protected function findFileIndex($filename){
+ return $this->source_keys[$filename];
+ }
+
+ /**
+ * fix windows paths
+ * @param string $path
+ * @return string
+ */
+ public function fixWindowsPath($path, $addEndSlash = false){
+ $slash = ($addEndSlash) ? '/' : '';
+ if( !empty($path) ){
+ $path = str_replace('\\', '/', $path);
+ $path = rtrim($path,'/') . $slash;
+ }
+
+ return $path;
+ }
+
+} \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-09 03:24:11 +0000