mirror of
https://github.com/pierre42100/comunic
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523 lines
17 KiB
PHP
523 lines
17 KiB
PHP
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<?php
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/*
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* Ruby's grammar is basically insane. We're not going to aim to correctly
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* highlight all legal Ruby code because we'll be here all year and we'll still
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* get it wrong, but we're going to have a go at getting the standard stuff
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* right as well as:
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* heredocs
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* balanced AND NESTED string/regex delimiters
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* interpolation
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*
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* disclaimer: I don't actually know Ruby.
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*
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* Problem is that Ruby *appears* to have to disambiguate loads of stuff at
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* runtime, which is frankly a little optimistic for a syntax highlighter.
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* Ruby allows you to omit calling parantheses, so it's not practical (and
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* impossible if the code snippet is incomplete) to figure out operator/operand
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* position. e.g.
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* x = y %r/z/x
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* is x = y mod r div z div x, unless y is a function, in which case it's:
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* x = y( /z/x ) where /z/x is a regex
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*/
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class LuminousRubyScanner extends LuminousScanner {
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// set to true if this is a nested scanner which needs to exit if it
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// encounters a } while nothing else is on the stack, i.e. it is being
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// used to process an interpolated block
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public $interpolation = false;
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protected $curley_braces = 0; // poor man's curly brace stack.
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public $rails = false;
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// operators depend somewhat on whether or not rails is active, else we
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// don't want to consume a '%' if it comes right before a '>', we want
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// to leave that for the rails close-tag detection
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private $operator_regex = null;
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private $string_regex = null;
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private $comment_regex = null;
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// gaaah
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private $numeric = '/
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(?:
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#control codes
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(?:\?(?:\\\[[:alpha:]]-)*[[:alpha:]])
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#hex
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(?:0[xX](?>[0-9A-Fa-f]+)[lL]*)
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# binary
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(?:0[bB][0-1]+)
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#octal
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(?:0[oO0][0-7]+)
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# regular number
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(?:
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(?>[0-9]+)
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(?:
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# fraction
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(?:
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(?:\.?(?>[0-9]+)?
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(?:(?:[eE][\+\-]?)?(?>[0-9]+))?
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)
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)
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)?
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)
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(
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# or only after the point, float x = .1;
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\.(?>[0-9]+)(?:(?:[eE][\+\-]?)?(?>[0-9]+))?
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)
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)
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(?:_+\d+)*
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/x';
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/// queue of heredoc declarations which will need to be handled as soon as EOL is reached
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/// each element is a tuple: (delimiter(str), identable?, interpolatable?)
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private $heredocs = array();
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public function init() {
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$this->comment_regex =
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$this->rails? "/ \# (?: [^\n%]*+ | %(?!>))* /x"
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: '/#.*/';
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// http://www.zenspider.com/Languages/Ruby/QuickRef.html#23
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$this->operator_regex = '/
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\? | ;
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| ::? | \*[=\*]? | \/=? | -=? | %=? | ^=? | &&? | \|\|? | \.{2,3}
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| \^=?
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| < (?:=>|<|=)? | >=?
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| =[>~] | ={1,3}
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| \+=? | ![=~]?
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/x';
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// $this->operator_regex = '/(?: [~!^&*\-+=:;|<>\/?';
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// if ($this->rails) $this->operator_regex .= ']+|%(?!>))+';
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// else $this->operator_regex .= '%]+)';
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// $this->operator_regex .= '/x';
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$this->add_identifier_mapping('KEYWORD', array('BEGIN', 'END', 'alias',
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'begin', 'break', 'case', 'class', 'def', 'defined?', 'do',
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'else', 'elsif', 'end', 'ensure', 'for', 'if', 'module', 'next',
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'redo', 'rescue', 'retry', 'return', 'self', 'super', 'then',
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'undef', 'unless', 'until', 'when', 'while', 'yield',
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'false', 'nil', 'self', 'true', '__FILE__', '__LINE__', 'TRUE', 'FALSE',
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'NIL', 'STDIN', 'STDERR', 'ENV', 'ARGF', 'ARGV', 'DATA', 'RUBY_VERSION',
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'RUBY_RELEASE_DATE', 'RUBY_PLATFORM',
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'and', 'in', 'not', 'or',
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'public', 'private', 'protected'
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));
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// http://www.tutorialspoint.com/ruby/ruby_builtin_functions.htm
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// don't know how reliable that is... doesn't look incredibly inspiring
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$this->add_identifier_mapping('FUNCTION', array('abord', 'Array',
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'at_exit', 'autoload', 'binding', 'block_given?', 'callcc', 'caller',
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'catch', 'chomp', 'chomp!', 'chop', 'chop!', 'eval', 'exec', 'exit',
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'exit!', 'fail', 'Float', 'fork', 'format', 'gets', 'global_variables',
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'gsub', 'gsub!', 'Integer', 'lambda', 'proc', 'load', 'local_variables',
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'loop', 'open', 'p', 'print', 'printf', 'proc', 'puts', 'raise', 'fail',
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'rand', 'readlines', 'require', 'scan', 'select', 'set_trace_func',
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'sleep', 'split', 'sprintf', 'srand', 'String', 'syscall', 'system',
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'sub', ',sub!', 'test', 'throw', 'trace_var', 'trap', 'untrace_var',
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'abs', 'ceil', 'coerce', 'divmod', 'floor', 'integer?', 'modulo',
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'nonzero?', 'remainder', 'round', 'truncate', 'zero?', 'chr', 'size',
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'step', 'times', 'to_f', 'to_int', 'to_i', 'finite?', 'infinite?',
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'nan?', 'atan2', 'cos', 'exp', 'frexp', 'ldexp', 'log', 'log10', 'sin',
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'sqrt', 'tan'));
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// this can break a bit with Ruby's whacky syntax
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$this->remove_filter('pcre');
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// don't want this.
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$this->remove_filter('comment-to-doc');
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$this->add_filter('REGEX', create_function('$tok',
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'return LuminousFilters::pcre($tok, (isset($tok[1][0]) && $tok[1][0] === "/"));'));
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}
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protected function is_regex() {
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/*
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* Annoyingly I don't really know exactly what rules Ruby uses for
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* disambiguating regular expressions. There might be some incorrect
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* assumptions in here.
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*/
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if ($this->check('%/=\s%'))
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return false;
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$following_space = (bool)$this->check("%/[ \t]%");
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$space = false;
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for($i=count($this->tokens)-1; $i>=0; $i--) {
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$tok = $this->tokens[$i];
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if ($tok[0] === 'COMMENT') continue;
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elseif ($tok[0] === 'OPERATOR') return true;
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elseif($tok[0] === 'STRING') return true;
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elseif ($tok[1] === '(' || $tok[1] === ',' || $tok[1] === '{' ||
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$tok[1] === '[') {
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// this is definitely an operand
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return true;
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}
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elseif($tok[0] === null) {
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$space = true;
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continue;
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}
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elseif($tok[0] === 'NUMERIC') {
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// this is definitely an operator
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return false;
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}
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elseif ($tok[0] === 'IDENT'
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|| $tok[0] === 'CONSTANT'
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|| $tok[0] === 'VALUE' // aka :symbols
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) {
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// this could be an operator or operand
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// Kate's syntax engine seems to operate on the following basis:
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if ($space && $following_space) return false;
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return $space;
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}
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return false;
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}
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return true; // no preceding tokens, presumably a code fragment.
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}
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protected function interpolate() {
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$interpolation_scanner = new LuminousRubyScanner();
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$interpolation_scanner->string($this->string());
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$interpolation_scanner->pos($this->pos());
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$interpolation_scanner->interpolation = true;
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$interpolation_scanner->init();
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$interpolation_scanner->main();
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$this->record($interpolation_scanner->tagged(), 'INTERPOLATION', true);
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$this->pos($interpolation_scanner->pos());
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}
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// handles the heredoc array. Call at eol/bol when the heredoc queue is
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// not empty
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protected function do_heredoc() {
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assert (!empty($this->heredocs));
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$start = $this->pos();
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for($i=0; $i<count($this->heredocs) ; ) {
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$top = $this->heredocs[$i];
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list($ident, $identable, $interpolatable) = $top;
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$searches = array(
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sprintf('/^%s%s\\b/m', $identable? "[ \t]*" : '',
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preg_quote($ident, '/'))
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);
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if ($interpolatable)
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$searches[] = '/\#\{/';
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list($next, $matches) = $this->get_next($searches);
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if ($next === -1) {
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// no match for end delim, run to EOS
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$this->record(substr($this->string(), $start), 'HEREDOC');
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$this->terminate();
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break;
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}
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assert($matches !== null);
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if ($matches[0] === '#{') { // interpolation, break heredoc and do that.
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$this->pos($next);
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$this->record(substr($this->string(), $start, $this->pos()-$start), 'HEREDOC');
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$this->record($matches[0], 'DELIMITER');
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$this->pos_shift(strlen($matches[0]));
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$this->interpolate();
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if ($this->peek() === '}')
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$this->record($this->get(), 'DELIMITER');
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$start = $this->pos();
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}
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else {
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//
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$this->pos($next);
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$this->record(substr($this->string(), $start, $this->pos()-$start), 'HEREDOC');
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$this->record($matches[0], 'DELIMITER');
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$this->pos($next + strlen($matches[0]));
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$start = $this->pos();
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$i++;
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}
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// subscanner might have consumed all the string, in which case there's
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// no point continuing
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if ($this->eos()) break;
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}
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// we may or may not have technically addressed all the heredocs in the
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// queue, but we do want to clear them out now
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$this->heredocs = array();
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}
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private function record_string_range($from, $to, $type, $split) {
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if ($to === $from) return;
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$substr = substr($this->string(), $from, $to-$from);
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if ($split) {
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foreach(preg_split('/(\s+)/', $substr, -1, PREG_SPLIT_DELIM_CAPTURE) as $s) {
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$type_ = preg_match('/^\s+$/', $s)? null : $type;
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$this->record($s, $type_);
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}
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} else {
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$this->record($substr, $type);
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}
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}
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// handles string types (inc regexes), which may have nestable delimiters or
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// interpolation.
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// strdata is defined in the big ugly block in main()
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// TODO: proper docs
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protected function do_string($str_data) {
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list($type, $open_delimiter, $close_delimiter, $pos, $interpolation,
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$fancy_delim, $split) = $str_data;
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$balanced = $open_delimiter !== $close_delimiter;
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$template = '/(?<!\\\\)((?:\\\\\\\\)*)(%s)/';
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$patterns = array();
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$patterns['term'] = sprintf($template, preg_quote($close_delimiter, '/'));
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if ($balanced) {
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// for nesting balanced delims
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$patterns['nest'] = sprintf($template, preg_quote($open_delimiter, '/'));
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}
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if ($interpolation) {
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$patterns['interp'] = sprintf($template, preg_quote('#{', '/'));
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}
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$nesting_level = 0;
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$break = false;
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while (!$break) {
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list($name, $index, $matches) = $this->get_next_named($patterns);
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if ($name === null) {
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// special case, no matches, record the rest of the string and break
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// immediately
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$this->record_string_range($pos, strlen($this->string()), $type, $split);
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$this->terminate();
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break;
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}
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elseif ($name === 'nest') {
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// nestable opener
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$nesting_level++;
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$this->pos( $index + strlen($matches[0]) );
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}
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elseif($name === 'term') {
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// terminator, may be nested
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if ($nesting_level === 0) {
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// wasn't nested, real terminator.
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if ($fancy_delim) {
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// matches[1] is either empty or a sequence of backslashes
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$this->record_string_range($pos, $index+strlen($matches[1]), $type, $split);
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$this->record($matches[2], 'DELIMITER');
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} else {
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$this->record_string_range($pos, $index+strlen($matches[0]), $type, $split);
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}
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$break = true;
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}
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else {
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// pop a nesting level
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$nesting_level--;
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}
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$this->pos( $index + strlen($matches[0]) );
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}
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elseif($name === 'interp') {
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// interpolation - temporarily break string highlighting, then
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// do interpolation, then resume.
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$this->record_string_range($pos, $index + strlen($matches[1]), $type, $split);
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$this->record($matches[2], 'DELIMITER');
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$this->pos( $index + strlen($matches[0]) );
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$this->interpolate();
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if (($c = $this->peek()) === '}')
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$this->record($this->get(), 'DELIMITER');
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$pos = $this->pos();
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}
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else {
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assert(0);
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}
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if ($break) break;
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}
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if ($type === 'REGEX' && $this->scan('/[iomx]+/'))
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$this->record($this->match(), 'KEYWORD');
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}
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public function main() {
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while (!$this->eos()) {
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if ($this->bol() && !empty($this->heredocs)) {
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|
|
$this->do_heredoc();
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->interpolation) {
|
||
|
|
$c = $this->peek();
|
||
|
|
if ($c === '{') $this->curley_braces++;
|
||
|
|
elseif($c === '}') {
|
||
|
|
$this->curley_braces--;
|
||
|
|
if ($this->curley_braces <= 0) { break;}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ($this->rails && $this->check('/-?%>/')) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
$c = $this->peek();
|
||
|
|
if ($c === '=' && $this->scan('/^=begin .*? (^=end|\\z)/msx')) {
|
||
|
|
$this->record($this->match(), 'DOCCOMMENT');
|
||
|
|
}
|
||
|
|
elseif($c === '#' && $this->scan($this->comment_regex))
|
||
|
|
$this->record($this->match(), 'COMMENT');
|
||
|
|
|
||
|
|
elseif($this->scan($this->numeric) !== null) {
|
||
|
|
$this->record($this->match(), 'NUMERIC');
|
||
|
|
}
|
||
|
|
elseif( $c === '$' && $this->scan('/\\$
|
||
|
|
(?:
|
||
|
|
(?:[!@`\'\+1~=\/\\\,;\._0\*\$\?:"&<>])
|
||
|
|
|
|
||
|
|
(?: -[0adFiIlpvw])
|
||
|
|
|
|
||
|
|
(?:DEBUG|FILENAME|LOAD_PATH|stderr|stdin|stdout|VERBOSE)
|
||
|
|
)/x') || $this->scan('/(\\$|@@?)\w+/')) {
|
||
|
|
$this->record($this->match(), 'VARIABLE');
|
||
|
|
}
|
||
|
|
elseif($this->scan('/:\w+/')) {
|
||
|
|
$this->record($this->match(), 'VALUE');
|
||
|
|
}
|
||
|
|
elseif ( $c === '<' && $this->scan('/(<<(-?))([\'"`]?)([A-Z_]\w*)(\\3)/i')) {
|
||
|
|
$m = $this->match_groups();
|
||
|
|
$this->record($m[0], 'DELIMITER');
|
||
|
|
$hdoc = array($m[4], $m[2] === '-', $m[3] !== "'");
|
||
|
|
$this->heredocs[] = $hdoc;
|
||
|
|
}
|
||
|
|
|
||
|
|
// TODO: "% hello " is I think a valid string, using whitespace as
|
||
|
|
// delimiters. We're going to disallow this for now because
|
||
|
|
// we're not disambiguating between that and modulus
|
||
|
|
elseif (($c === '"' || $c === "'" || $c === '`' || $c === '%') &&
|
||
|
|
$this->scan('/[\'"`]|%( [qQrswWx](?![[:alnum:]]|$) | (?![[:alnum:]\s]|$))/xm')
|
||
|
|
|| ($c === '/' && $this->is_regex())
|
||
|
|
)
|
||
|
|
{
|
||
|
|
$interpolation = false;
|
||
|
|
$type = 'STRING';
|
||
|
|
$delimiter;
|
||
|
|
$pos;
|
||
|
|
$fancy_delim = false;
|
||
|
|
$split = false;
|
||
|
|
|
||
|
|
if ($c === '/') {
|
||
|
|
$interpolation = true;
|
||
|
|
$type = 'REGEX';
|
||
|
|
$delimiter = $c;
|
||
|
|
$pos = $this->pos();
|
||
|
|
$this->get();
|
||
|
|
} else {
|
||
|
|
$pos = $this->match_pos();
|
||
|
|
$delimiter = $this->match();
|
||
|
|
if ($delimiter === '"') {
|
||
|
|
$interpolation = true;
|
||
|
|
} elseif($delimiter === "'") {}
|
||
|
|
elseif($delimiter === '`') {
|
||
|
|
$type = 'FUNCTION';
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
$delimiter = $this->get();
|
||
|
|
$m1 = $this->match_group(1);
|
||
|
|
if ($m1 === 'Q' || $m1 === 'r' || $m1 === 'W' || $m1 === 'x')
|
||
|
|
$interpolation = true;
|
||
|
|
if ($m1 === 'w' || $m1 === 'W')
|
||
|
|
$split = true;
|
||
|
|
if ($m1 === 'x') $type = 'FUNCTION';
|
||
|
|
elseif($m1 === 'r') $type = 'REGEX';
|
||
|
|
|
||
|
|
$fancy_delim = true;
|
||
|
|
$this->record($this->match() . $delimiter, 'DELIMITER');
|
||
|
|
$pos = $this->pos();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$data = array($type, $delimiter, LuminousUtils::balance_delimiter($delimiter),
|
||
|
|
$pos, $interpolation, $fancy_delim, $split);
|
||
|
|
$this->do_string($data);
|
||
|
|
}
|
||
|
|
elseif( (ctype_alpha($c) || $c === '_') &&
|
||
|
|
($m = $this->scan('/[_a-zA-Z]\w*[!?]?/')) !== null) {
|
||
|
|
$this->record($m, ctype_upper($m[0])? 'CONSTANT' : 'IDENT');
|
||
|
|
if ($m === '__END__') {
|
||
|
|
if (!$this->interpolation) {
|
||
|
|
$this->record($this->rest(), null);
|
||
|
|
$this->terminate();
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
elseif($this->scan($this->operator_regex))
|
||
|
|
$this->record($this->match(), 'OPERATOR');
|
||
|
|
elseif($this->scan("/[ \t]+/")) $this->record($this->match(), null);
|
||
|
|
else {
|
||
|
|
$this->record($this->get(), null);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// In case not everything was popped
|
||
|
|
if (isset($this->state_[0])) {
|
||
|
|
$this->record(
|
||
|
|
substr($this->string(), $this->state_[0][3],
|
||
|
|
$this->pos() - $this->state_[0][3]),
|
||
|
|
$this->state_[0][0]
|
||
|
|
);
|
||
|
|
$this->terminate();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
public static function guess_language($src, $info) {
|
||
|
|
if (strpos($info['shebang'], 'ruby') !== false) return 1.0;
|
||
|
|
elseif($info['shebang']) return 0;
|
||
|
|
$p = 0;
|
||
|
|
if (strpos($src, 'nil')) $p += 0.05;
|
||
|
|
if (strpos($src, '.nil?')) $p += 0.02;
|
||
|
|
if (strpos($src, '.empty?')) $p += 0.02;
|
||
|
|
// interpolation
|
||
|
|
if (strpos($src, '#{$')) $p += 0.02;
|
||
|
|
// @ and $ vars
|
||
|
|
if (preg_match('/@[a-zA-Z_]/', $src) && preg_match('/\\$[a-zA-Z_]/', $src))
|
||
|
|
$p += 0.02;
|
||
|
|
// symbols
|
||
|
|
if (preg_match('/:[a-zA-Z_]/', $src)) $p += 0.01;
|
||
|
|
// func def - no args
|
||
|
|
if (preg_match("/^\s*+def\s++[a-zA-Z_]\w*+[ \t]*+[\n\r]/m", $src))
|
||
|
|
$p += 0.1;
|
||
|
|
// {|x[,y[,z...]]| is a very ruby-like construct
|
||
|
|
if (preg_match('/ \\{ \\|
|
||
|
|
\s*+ [a-zA-Z_]\w*+ \s*+
|
||
|
|
(,\s*+[a-zA-Z_]\w*+\s*+)*+
|
||
|
|
\\|/x', $src))
|
||
|
|
$p += 0.15;
|
||
|
|
// so is 'do |x|'
|
||
|
|
if (preg_match("/\\bdo\s*+\\|[^\\|\r\n]++\\|/", $src))
|
||
|
|
$p += 0.05;
|
||
|
|
|
||
|
|
// class defs with inheritance has quite distinct syntax
|
||
|
|
// class x < y
|
||
|
|
if (preg_match(
|
||
|
|
"/^ \s* class \s+ \w+ \s* < \s* \w+(::\w+)* [\t ]*+ [\r\n] /mx",
|
||
|
|
$src))
|
||
|
|
$p += 0.1;
|
||
|
|
|
||
|
|
$num_lines = $info['num_lines'];
|
||
|
|
// let's say if 5% of lines are hash commented that's a good thing
|
||
|
|
if (substr_count($src, '#') > $num_lines/20) $p += 0.05;
|
||
|
|
// =~ /regex/
|
||
|
|
if (preg_match('%=~\s++/%', $src)) $p += 0.02;
|
||
|
|
|
||
|
|
if (preg_match('/unless\s+[^\?]++\?/', $src)) $p += 0.05;
|
||
|
|
|
||
|
|
if (preg_match('/^(\s*+)def\s+.*^\1end\s/ms', $src)) $p += 0.05;
|
||
|
|
|
||
|
|
if (preg_match('/\.to_\w+(?=\s|$)/', $src)) $p += 0.01;
|
||
|
|
|
||
|
|
|
||
|
|
return $p;
|
||
|
|
}
|
||
|
|
}
|