Class: StringScanner

4
5
6
7
8
9
10

# File 'opal/stdlib/strscan.rb', line 4
def initialize(string)
 @string = string
 @pos = 0
 @matched = nil
 @working = string
 @match = []
end

2
3
4

# File 'opal/stdlib/strscan.rb', line 2
def matched
 @matched
end

2
3
4

# File 'opal/stdlib/strscan.rb', line 2
def pos
 @pos
end

12
13
14

# File 'opal/stdlib/strscan.rb', line 12
def string
 @string
end

81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110

# File 'opal/stdlib/strscan.rb', line 81
def [](idx)
 if @match.empty?
 return nil
 end
 case idx
 when Symbol
 idx = idx.to_s
 when String 
 # noop
 else
 idx = ::Opal.coerce_to!(idx, Integer , :to_int)
 end
 %x{
 var match = #{@match};
 if (idx < 0) {
 idx += match.length;
 }
 if (idx < 0 || idx >= match.length) {
 return nil;
 }
 if (match[idx] == null) {
 return nil;
 }
 return match[idx];
 }
end

14
15
16

# File 'opal/stdlib/strscan.rb', line 14
def beginning_of_line?
 `#{@pos} === 0 || #{@string}.charAt(#{@pos} - 1) === "\n"`
end

112
113
114
115
116
117
118
119
120
121
122
123
124

# File 'opal/stdlib/strscan.rb', line 112
def check(pattern)
 pattern = anchor(pattern)
 %x{
 var result = pattern.exec(#{@working});
 if (result == null) {
 return #{@matched} = nil;
 }
 return #{@matched} = result[0];
 }
end

126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143

# File 'opal/stdlib/strscan.rb', line 126
def check_until(pattern)
 %x{
 var prev_pos = #{@prev_pos},
 pos = #{@pos};
 var result = #{scan_until(pattern)};
 if (result !== nil) {
 #{@matched} = result.substr(-1);
 #{@working} = #{@string}.substr(pos);
 }
 #{@prev_pos} = prev_pos;
 #{@pos} = pos;
 return result;
 }
end

149
150
151

# File 'opal/stdlib/strscan.rb', line 149
def eos?
 `#{@working}.length === 0`
end

153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

# File 'opal/stdlib/strscan.rb', line 153
def exist?(pattern)
 %x{
 var result = pattern.exec(#{@working});
 if (result == null) {
 return nil;
 }
 else if (result.index == 0) {
 return 0;
 }
 else {
 return result.index + 1;
 }
 }
end

209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225

# File 'opal/stdlib/strscan.rb', line 209
def get_byte
 %x{
 var result = nil;
 if (#{@pos} < #{@string}.length) {
 #{@prev_pos} = #{@pos};
 #{@pos} += 1;
 result = #{@matched} = #{@working}.substring(0, 1);
 #{@working} = #{@working}.substring(1);
 }
 else {
 #{@matched} = nil;
 }
 return result;
 }
end

227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242

# File 'opal/stdlib/strscan.rb', line 227
def match?(pattern)
 pattern = anchor(pattern)
 %x{
 var result = pattern.exec(#{@working});
 if (result == null) {
 return nil;
 }
 else {
 #{@prev_pos} = #{@pos};
 return result[0].length;
 }
 }
end

255
256
257
258
259
260
261
262
263

# File 'opal/stdlib/strscan.rb', line 255
def matched_size
 %x{
 if (#{@matched} === nil) {
 return nil;
 }
 return #{@matched}.length
 }
end

145
146
147

# File 'opal/stdlib/strscan.rb', line 145
def peek(length)
 `#{@working}.substring(0, length)`
end

265
266
267
268
269
270
271
272
273

# File 'opal/stdlib/strscan.rb', line 265
def post_match
 %x{
 if (#{@matched} === nil) {
 return nil;
 }
 return #{@string}.substr(#{@pos});
 }
end

275
276
277
278
279
280
281
282
283

# File 'opal/stdlib/strscan.rb', line 275
def pre_match
 %x{
 if (#{@matched} === nil) {
 return nil;
 }
 return #{@string}.substr(0, #{@prev_pos});
 }
end

285
286
287
288
289

# File 'opal/stdlib/strscan.rb', line 285
def reset
 @working = @string
 @matched = nil
 @pos = 0
end

291
292
293

# File 'opal/stdlib/strscan.rb', line 291
def rest
 @working
end

295
296
297

# File 'opal/stdlib/strscan.rb', line 295
def rest?
 `#{@working}.length !== 0`
end

299
300
301

# File 'opal/stdlib/strscan.rb', line 299
def rest_size
 rest.size
end

18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

# File 'opal/stdlib/strscan.rb', line 18
def scan(pattern)
 pattern = anchor(pattern)
 %x{
 var result = pattern.exec(#{@working});
 if (result == null) {
 return #{@matched} = nil;
 }
 else if (typeof(result) === 'object') {
 #{@prev_pos} = #{@pos};
 #{@pos} += result[0].length;
 #{@working} = #{@working}.substring(result[0].length);
 #{@matched} = result[0];
 #{@match} = result;
 return result[0];
 }
 else if (typeof(result) === 'string') {
 #{@pos} += result.length;
 #{@working} = #{@working}.substring(result.length);
 return result;
 }
 else {
 return nil;
 }
 }
end

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
73
74
75
76
77
78
79

# File 'opal/stdlib/strscan.rb', line 48
def scan_until(pattern)
 pattern = anchor(pattern)
 %x{
 var pos = #{@pos},
 working = #{@working},
 result;
 while (true) {
 result = pattern.exec(working);
 pos += 1;
 working = working.substr(1);
 if (result == null) {
 if (working.length === 0) {
 #{@match} = [];
 return #{@matched} = nil;
 }
 continue;
 }
 #{@matched} = #{@string}.substr(#{@pos}, pos - #{@pos} - 1 + result[0].length);
 #{@match} = result;
 #{@prev_pos} = pos - 1;
 #{@pos} = pos;
 #{@working} = working.substr(result[0].length);
 return #{@matched};
 }
 }
end

169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192

# File 'opal/stdlib/strscan.rb', line 169
def skip(pattern)
 pattern = anchor(pattern)
 %x{
 var result = pattern.exec(#{@working});
 if (result == null) {
 #{@match} = [];
 return #{@matched} = nil;
 }
 else {
 var match_str = result[0];
 var match_len = match_str.length;
 #{@matched} = match_str;
 #{@match} = result;
 #{@prev_pos} = #{@pos};
 #{@pos} += match_len;
 #{@working} = #{@working}.substring(match_len);
 return match_len;
 }
 }
end

194
195
196
197
198
199
200
201
202
203
204
205
206
207

# File 'opal/stdlib/strscan.rb', line 194
def skip_until(pattern)
 %x{
 var result = #{scan_until(pattern)};
 if (result === nil) {
 return nil;
 }
 else {
 #{@matched} = result.substr(-1);
 return result.length;
 }
 }
end

303
304
305
306

# File 'opal/stdlib/strscan.rb', line 303
def terminate
 @match = nil
 self.pos = @string.length
end

308
309
310
311
312
313
314

# File 'opal/stdlib/strscan.rb', line 308
def unscan
 @pos = @prev_pos
 @prev_pos = nil
 @match = nil
 self
end