| Class | CodeRay::Scanners::JavaScript |
| In: |
lib/coderay/scanners/java_script.rb
|
| Parent: | Scanner |
Scanner for JavaScript.
Aliases: ecmascript, ecma_script, javascript
# File lib/coderay/scanners/java_script.rb, line 201
201: def reset_instance
202: super
203: @xml_scanner.reset if defined? @xml_scanner
204: end
# File lib/coderay/scanners/java_script.rb, line 57
57: def scan_tokens encoder, options
58:
59: state = :initial
60: string_delimiter = nil
61: value_expected = true
62: key_expected = false
63: function_expected = false
64:
65: until eos?
66:
67: case state
68:
69: when :initial
70:
71: if match = scan(/ \s+ | \\\n /x)
72: value_expected = true if !value_expected && match.index(?\n)
73: encoder.text_token match, :space
74:
75: elsif match = scan(%r! // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !mx)
76: value_expected = true
77: encoder.text_token match, :comment
78:
79: elsif check(/\.?\d/)
80: key_expected = value_expected = false
81: if match = scan(/0[xX][0-9A-Fa-f]+/)
82: encoder.text_token match, :hex
83: elsif match = scan(/(?>0[0-7]+)(?![89.eEfF])/)
84: encoder.text_token match, :octal
85: elsif match = scan(/\d+[fF]|\d*\.\d+(?:[eE][+-]?\d+)?[fF]?|\d+[eE][+-]?\d+[fF]?/)
86: encoder.text_token match, :float
87: elsif match = scan(/\d+/)
88: encoder.text_token match, :integer
89: end
90:
91: elsif value_expected && match = scan(/<([[:alpha:]]\w*) (?: [^\/>]*\/> | .*?<\/\1>)/xim)
92: # TODO: scan over nested tags
93: xml_scanner.tokenize match, :tokens => encoder
94: value_expected = false
95: next
96:
97: elsif match = scan(/ [-+*=<>?:;,!&^|(\[{~%]+ | \.(?!\d) /x)
98: value_expected = true
99: last_operator = match[-1]
100: key_expected = (last_operator == ?{) || (last_operator == ?,)
101: function_expected = false
102: encoder.text_token match, :operator
103:
104: elsif match = scan(/ [)\]}]+ /x)
105: function_expected = key_expected = value_expected = false
106: encoder.text_token match, :operator
107:
108: elsif match = scan(/ [$a-zA-Z_][A-Za-z_0-9$]* /x)
109: kind = IDENT_KIND[match]
110: value_expected = (kind == :keyword) && KEYWORDS_EXPECTING_VALUE[match]
111: # TODO: labels
112: if kind == :ident
113: if match.index(?$) # $ allowed inside an identifier
114: kind = :predefined
115: elsif function_expected
116: kind = :function
117: elsif check(/\s*[=:]\s*function\b/)
118: kind = :function
119: elsif key_expected && check(/\s*:/)
120: kind = :key
121: end
122: end
123: function_expected = (kind == :keyword) && (match == 'function')
124: key_expected = false
125: encoder.text_token match, kind
126:
127: elsif match = scan(/["']/)
128: if key_expected && check(KEY_CHECK_PATTERN[match])
129: state = :key
130: else
131: state = :string
132: end
133: encoder.begin_group state
134: string_delimiter = match
135: encoder.text_token match, :delimiter
136:
137: elsif value_expected && (match = scan(/\//))
138: encoder.begin_group :regexp
139: state = :regexp
140: string_delimiter = '/'
141: encoder.text_token match, :delimiter
142:
143: elsif match = scan(/ \/ /x)
144: value_expected = true
145: key_expected = false
146: encoder.text_token match, :operator
147:
148: else
149: encoder.text_token getch, :error
150:
151: end
152:
153: when :string, :regexp, :key
154: if match = scan(STRING_CONTENT_PATTERN[string_delimiter])
155: encoder.text_token match, :content
156: elsif match = scan(/["'\/]/)
157: encoder.text_token match, :delimiter
158: if state == :regexp
159: modifiers = scan(/[gim]+/)
160: encoder.text_token modifiers, :modifier if modifiers && !modifiers.empty?
161: end
162: encoder.end_group state
163: string_delimiter = nil
164: key_expected = value_expected = false
165: state = :initial
166: elsif state != :regexp && (match = scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /mox))
167: if string_delimiter == "'" && !(match == "\\\\" || match == "\\'")
168: encoder.text_token match, :content
169: else
170: encoder.text_token match, :char
171: end
172: elsif state == :regexp && match = scan(/ \\ (?: #{ESCAPE} | #{REGEXP_ESCAPE} | #{UNICODE_ESCAPE} ) /mox)
173: encoder.text_token match, :char
174: elsif match = scan(/\\./m)
175: encoder.text_token match, :content
176: elsif match = scan(/ \\ | $ /x)
177: encoder.end_group state
178: encoder.text_token match, :error
179: key_expected = value_expected = false
180: state = :initial
181: else
182: raise_inspect "else case \" reached; %p not handled." % peek(1), encoder
183: end
184:
185: else
186: raise_inspect 'Unknown state', encoder
187:
188: end
189:
190: end
191:
192: if [:string, :regexp].include? state
193: encoder.end_group state
194: end
195:
196: encoder
197: end