Class: Regexp

Inherits:
Object show all
Defined in:
opal/opal/corelib/regexp.rb,
opal/opal/corelib/marshal/write_buffer.rb

Constant Summary collapse

IGNORECASE =
1
EXTENDED =
2
MULTILINE =
4

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.allocateObject



11
12
13
14
15
# File 'opal/opal/corelib/regexp.rb', line 11

def allocate
  allocated = super
  `#{allocated}.uninitialized = true`
  allocated
end

.escape(string) ⇒ Object Also known as: quote



17
18
19
# File 'opal/opal/corelib/regexp.rb', line 17

def escape(string)
  `Opal.escape_regexp(string)`
end

.last_match(n = nil) ⇒ Object



21
22
23
24
25
26
27
# File 'opal/opal/corelib/regexp.rb', line 21

def last_match(n = nil)
  if n.nil?
    $~
  else
    $~[n]
  end
end

.new(regexp, options = undefined) ⇒ Object



74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
# File 'opal/opal/corelib/regexp.rb', line 74

def new(regexp, options = undefined)
  %x{
    if (regexp.$$is_regexp) {
      return new RegExp(regexp);
    }

    regexp = #{Opal.coerce_to!(regexp, String, :to_str)};

    if (regexp.charAt(regexp.length - 1) === '\\' && regexp.charAt(regexp.length - 2) !== '\\') {
      #{raise RegexpError, "too short escape sequence: /#{regexp}/"}
    }

    if (options === undefined || #{!options}) {
      return new RegExp(regexp);
    }

    if (options.$$is_number) {
      var temp = '';
      if (#{IGNORECASE} & options) { temp += 'i'; }
      if (#{MULTILINE}  & options) { temp += 'm'; }
      options = temp;
    }
    else {
      options = 'i';
    }

    return new RegExp(regexp, options);
  }
end

.union(*parts) ⇒ Object



31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
# File 'opal/opal/corelib/regexp.rb', line 31

def union(*parts)
  %x{
    var is_first_part_array, quoted_validated, part, options, each_part_options;
    if (parts.length == 0) {
      return /(?!)/;
    }
    // return fast if there's only one element
    if (parts.length == 1 && parts[0].$$is_regexp) {
      return parts[0];
    }
    // cover the 2 arrays passed as arguments case
    is_first_part_array = parts[0].$$is_array;
    if (parts.length > 1 && is_first_part_array) {
      #{raise TypeError, 'no implicit conversion of Array into String'}
    }
    // deal with splat issues (related to https://github.com/opal/opal/issues/858)
    if (is_first_part_array) {
      parts = parts[0];
    }
    options = undefined;
    quoted_validated = [];
    for (var i=0; i < parts.length; i++) {
      part = parts[i];
      if (part.$$is_string) {
        quoted_validated.push(#{escape(`part`)});
      }
      else if (part.$$is_regexp) {
        each_part_options = #{`part`.options};
        if (options != undefined && options != each_part_options) {
          #{raise TypeError, 'All expressions must use the same options'}
        }
        options = each_part_options;
        quoted_validated.push('('+part.source+')');
      }
      else {
        quoted_validated.push(#{escape(`part`.to_str)});
      }
    }
  }
  # Take advantage of logic that can parse options from JS Regex
  new(`quoted_validated`.join('|'), `options`)
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql?



105
106
107
# File 'opal/opal/corelib/regexp.rb', line 105

def ==(other)
  `other instanceof RegExp && self.toString() === other.toString()`
end

#===(string) ⇒ Object



109
110
111
# File 'opal/opal/corelib/regexp.rb', line 109

def ===(string)
  `#{match(Opal.coerce_to?(string, String, :to_str))} !== nil`
end

#=~(string) ⇒ Object



113
114
115
# File 'opal/opal/corelib/regexp.rb', line 113

def =~(string)
  match(string) && $~.begin(0)
end

#__marshal__(buffer) ⇒ Object



83
84
85
86
87
88
89
90
91
# File 'opal/opal/corelib/marshal/write_buffer.rb', line 83

def __marshal__(buffer)
  buffer.save_link(self)
  buffer.write_ivars_prefix(self)
  buffer.write_extends(self)
  buffer.write_user_class(Regexp, self)
  buffer.append('/')
  buffer.write_regexp(self)
  buffer.write_ivars_suffix(self)
end

#casefold?Boolean

Returns:



269
270
271
# File 'opal/opal/corelib/regexp.rb', line 269

def casefold?
  `self.ignoreCase`
end

#inspectObject



119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
# File 'opal/opal/corelib/regexp.rb', line 119

def inspect
  # Use a regexp to extract the regular expression and the optional mode modifiers from the string.
  # In the regular expression, escape any front slash (not already escaped) with a backslash.
  %x{
    var regexp_format = /^\/(.*)\/([^\/]*)$/;
    var value = self.toString();
    var matches = regexp_format.exec(value);
    if (matches) {
      var regexp_pattern = matches[1];
      var regexp_flags = matches[2];
      var chars = regexp_pattern.split('');
      var chars_length = chars.length;
      var char_escaped = false;
      var regexp_pattern_escaped = '';
      for (var i = 0; i < chars_length; i++) {
        var current_char = chars[i];
        if (!char_escaped && current_char == '/') {
          regexp_pattern_escaped = regexp_pattern_escaped.concat('\\');
        }
        regexp_pattern_escaped = regexp_pattern_escaped.concat(current_char);
        if (current_char == '\\') {
          if (char_escaped) {
            // does not over escape
            char_escaped = false;
          } else {
            char_escaped = true;
          }
        } else {
          char_escaped = false;
        }
      }
      return '/' + regexp_pattern_escaped + '/' + regexp_flags;
    } else {
      return value;
    }
  }
end

#match(string, pos = undefined, &block) ⇒ Object



157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
# File 'opal/opal/corelib/regexp.rb', line 157

def match(string, pos = undefined, &block)
  %x{
    if (self.uninitialized) {
      #{raise TypeError, 'uninitialized Regexp'}
    }

    if (pos === undefined) {
      if (string === nil) return #{$~ = nil};
      var m = self.exec(#{Opal.coerce_to(string, String, :to_str)});
      if (m) {
        #{$~ = MatchData.new(`self`, `m`)};
        return block === nil ? #{$~} : #{yield $~};
      } else {
        return #{$~ = nil};
      }
    }

    pos = #{Opal.coerce_to(pos, Integer, :to_int)};

    if (string === nil) {
      return #{$~ = nil};
    }

    string = #{Opal.coerce_to(string, String, :to_str)};

    if (pos < 0) {
      pos += string.length;
      if (pos < 0) {
        return #{$~ = nil};
      }
    }

    // global RegExp maintains state, so not using self/this
    var md, re = Opal.global_regexp(self);

    while (true) {
      md = re.exec(string);
      if (md === null) {
        return #{$~ = nil};
      }
      if (md.index >= pos) {
        #{$~ = MatchData.new(`re`, `md`)};
        return block === nil ? #{$~} : #{yield $~};
      }
      re.lastIndex = md.index + 1;
    }
  }
end

#match?(string, pos = undefined) ⇒ Boolean

Returns:



206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
# File 'opal/opal/corelib/regexp.rb', line 206

def match?(string, pos = undefined)
  %x{
    if (self.uninitialized) {
      #{raise TypeError, 'uninitialized Regexp'}
    }

    if (pos === undefined) {
      return string === nil ? false : self.test(#{Opal.coerce_to(string, String, :to_str)});
    }

    pos = #{Opal.coerce_to(pos, Integer, :to_int)};

    if (string === nil) {
      return false;
    }

    string = #{Opal.coerce_to(string, String, :to_str)};

    if (pos < 0) {
      pos += string.length;
      if (pos < 0) {
        return false;
      }
    }

    // global RegExp maintains state, so not using self/this
    var md, re = Opal.global_regexp(self);

    md = re.exec(string);
    if (md === null || md.index < pos) {
      return false;
    } else {
      return true;
    }
  }
end

#optionsObject



251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
# File 'opal/opal/corelib/regexp.rb', line 251

def options
  # Flags would be nice to use with this, but still experimental - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/flags
  %x{
    if (self.uninitialized) {
      #{raise TypeError, 'uninitialized Regexp'}
    }
    var result = 0;
    // should be supported in IE6 according to https://msdn.microsoft.com/en-us/library/7f5z26w4(v=vs.94).aspx
    if (self.multiline) {
      result |= #{MULTILINE};
    }
    if (self.ignoreCase) {
      result |= #{IGNORECASE};
    }
    return result;
  }
end

#sourceObject Also known as: to_s



247
248
249
# File 'opal/opal/corelib/regexp.rb', line 247

def source
  `self.source`
end

#~Object



243
244
245
# File 'opal/opal/corelib/regexp.rb', line 243

def ~
  self =~ $_
end