176 lines
4.2 KiB
Ruby
176 lines
4.2 KiB
Ruby
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# http://pastie.textmate.org/50774/
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module CodeRay module Scanners
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class JavaScript < Scanner
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register_for :javascript
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RESERVED_WORDS = [
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'asm', 'break', 'case', 'continue', 'default', 'do', 'else',
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'for', 'goto', 'if', 'return', 'switch', 'while',
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# 'struct', 'union', 'enum', 'typedef',
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# 'static', 'register', 'auto', 'extern',
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# 'sizeof',
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'typeof',
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# 'volatile', 'const', # C89
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# 'inline', 'restrict', # C99
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'var', 'function','try','new','in',
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'instanceof','throw','catch'
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]
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PREDEFINED_CONSTANTS = [
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'void', 'null', 'this',
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'true', 'false','undefined',
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]
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IDENT_KIND = WordList.new(:ident).
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add(RESERVED_WORDS, :reserved).
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add(PREDEFINED_CONSTANTS, :pre_constant)
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ESCAPE = / [rbfnrtv\n\\\/'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} /x
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UNICODE_ESCAPE = / u[a-fA-F0-9]{4} | U[a-fA-F0-9]{8} /x
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def scan_tokens tokens, options
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state = :initial
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string_type = nil
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regexp_allowed = true
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until eos?
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kind = :error
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match = nil
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if state == :initial
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if scan(/ \s+ | \\\n /x)
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kind = :space
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elsif scan(%r! // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !mx)
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kind = :comment
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regexp_allowed = false
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elsif match = scan(/ \# \s* if \s* 0 /x)
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match << scan_until(/ ^\# (?:elif|else|endif) .*? $ | \z /xm) unless eos?
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kind = :comment
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regexp_allowed = false
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elsif regexp_allowed and scan(/\//)
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tokens << [:open, :regexp]
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state = :regex
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kind = :delimiter
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elsif scan(/ [-+*\/=<>?:;,!&^|()\[\]{}~%] | \.(?!\d) /x)
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kind = :operator
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regexp_allowed=true
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elsif match = scan(/ [$A-Za-z_][A-Za-z_0-9]* /x)
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kind = IDENT_KIND[match]
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# if kind == :ident and check(/:(?!:)/)
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# match << scan(/:/)
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# kind = :label
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# end
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regexp_allowed=false
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elsif match = scan(/["']/)
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tokens << [:open, :string]
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string_type = matched
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state = :string
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kind = :delimiter
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# elsif scan(/#\s*(\w*)/)
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# kind = :preprocessor # FIXME multiline preprocs
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# state = :include_expected if self[1] == 'include'
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#
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# elsif scan(/ L?' (?: [^\'\n\\] | \\ #{ESCAPE} )? '? /ox)
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# kind = :char
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elsif scan(/0[xX][0-9A-Fa-f]+/)
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kind = :hex
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regexp_allowed=false
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elsif scan(/(?:0[0-7]+)(?![89.eEfF])/)
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kind = :oct
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regexp_allowed=false
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elsif scan(/(?:\d+)(?![.eEfF])/)
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kind = :integer
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regexp_allowed=false
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elsif scan(/\d[fF]?|\d*\.\d+(?:[eE][+-]?\d+)?[fF]?|\d+[eE][+-]?\d+[fF]?/)
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kind = :float
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regexp_allowed=false
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else
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getch
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end
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elsif state == :regex
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if scan(/[^\\\/]+/)
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kind = :content
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elsif scan(/\\\/|\\\\/)
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kind = :content
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elsif scan(/\//)
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tokens << [matched, :delimiter]
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tokens << [:close, :regexp]
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state = :initial
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next
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else
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getch
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kind = :content
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end
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elsif state == :string
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if scan(/[^\\"']+/)
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kind = :content
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elsif scan(/["']/)
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if string_type==matched
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tokens << [matched, :delimiter]
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tokens << [:close, :string]
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state = :initial
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string_type=nil
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next
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else
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kind = :content
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end
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elsif scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /mox)
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kind = :char
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elsif scan(/ \\ | $ /x)
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kind = :error
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state = :initial
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else
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raise "else case \" reached; %p not handled." % peek(1), tokens
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end
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# elsif state == :include_expected
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# if scan(/<[^>\n]+>?|"[^"\n\\]*(?:\\.[^"\n\\]*)*"?/)
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# kind = :include
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# state = :initial
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#
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# elsif match = scan(/\s+/)
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# kind = :space
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# state = :initial if match.index ?\n
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#
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# else
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# getch
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#
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# end
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#
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else
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raise 'else-case reached', tokens
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end
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match ||= matched
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# raise [match, kind], tokens if kind == :error
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tokens << [match, kind]
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end
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tokens
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end
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end
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end end
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