Class: StringScanner

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# File 'opal/stdlib/strscan.rb', line 5
def initialize(string)
 @string = string
 @pos = 0
 @matched = nil
 @working = string
 @match = []
end

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# File 'opal/stdlib/strscan.rb', line 3
def matched
 @matched
end

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

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# File 'opal/stdlib/strscan.rb', line 13
def string
 @string
end

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# File 'opal/stdlib/strscan.rb', line 49
def [](idx)
 %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

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# File 'opal/stdlib/strscan.rb', line 15
def beginning_of_line?
 `#@pos === 0 || #@string.charAt(#@pos - 1) === "\n"`
end

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# File 'opal/stdlib/strscan.rb', line 69
def check(regex)
 %x{
 var regexp = new RegExp('^' + regex.toString().substring(1, regex.toString().length - 1)),
 result = regexp.exec(#@working);
 if (result == null) {
 return #{self}.matched = nil;
 }
 return #{self}.matched = result[0];
 }
end

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# File 'opal/stdlib/strscan.rb', line 86
def eos?
 `#@working.length === 0`
end

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# File 'opal/stdlib/strscan.rb', line 110
def get_byte()
 %x{
 var result = nil;
 if (#{self}.pos < #{self}.string.length) {
 self.prev_pos = self.pos;
 #{self}.pos += 1;
 result = #{self}.matched = #{self}.working.substring(0, 1);
 #{self}.working = #{self}.working.substring(1);
 }
 else {
 #{self}.matched = nil;
 }
 return result;
 }
end

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# File 'opal/stdlib/strscan.rb', line 82
def peek(length)
 `#@working.substring(0, length)`
end

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# File 'opal/stdlib/strscan.rb', line 141
def reset
 @working = @string
 @matched = nil
 @pos = 0
end

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# File 'opal/stdlib/strscan.rb', line 147
def rest
 @working
end

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# File 'opal/stdlib/strscan.rb', line 151
def rest?
 `#@working.length !== 0`
end

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# File 'opal/stdlib/strscan.rb', line 20
def scan(regex)
 %x{
 var regex = new RegExp('^' + regex.toString().substring(1, regex.toString().length - 1)),
 result = regex.exec(#@working);
 if (result == null) {
 return #{self}.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

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# File 'opal/stdlib/strscan.rb', line 90
def skip(re)
 %x{
 re = new RegExp('^' + re.source)
 var result = re.exec(#@working);
 if (result == null) {
 return #{self}.matched = nil;
 }
 else {
 var match_str = result[0];
 var match_len = match_str.length;
 #{self}.matched = match_str;
 self.prev_pos = self.pos;
 #{self}.pos += match_len;
 #{self}.working = #{self}.working.substring(match_len);
 return match_len;
 }
 }
end

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# File 'opal/stdlib/strscan.rb', line 155
def terminate
 @match = nil
 self.pos = @string.length
end

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# File 'opal/stdlib/strscan.rb', line 160
def unscan
 @pos = @prev_pos
 @prev_pos = nil
 @match = nil
 self
end