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 83
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 103
def check(pattern)
 pattern = anchor(pattern)
 %x{
 var result = pattern.exec(#@working);
 if (result == null) {
 return #@matched = nil;
 }
 return #@matched = result[0];
 }
end

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# File 'opal/stdlib/strscan.rb', line 117
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

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# File 'opal/stdlib/strscan.rb', line 140
def eos?
 `#@working.length === 0`
end

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# File 'opal/stdlib/strscan.rb', line 144
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

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# File 'opal/stdlib/strscan.rb', line 198
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

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# File 'opal/stdlib/strscan.rb', line 219
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

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# File 'opal/stdlib/strscan.rb', line 247
def matched_size
 %x{
 if (#@matched === nil) {
 return nil;
 }
 return #@matched.length
 }
end

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# File 'opal/stdlib/strscan.rb', line 136
def peek(length)
 `#@working.substring(0, length)`
end

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# File 'opal/stdlib/strscan.rb', line 257
def post_match
 %x{
 if (#@matched === nil) {
 return nil;
 }
 return #@string.substr(#@pos);
 }
end

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# File 'opal/stdlib/strscan.rb', line 267
def pre_match
 %x{
 if (#@matched === nil) {
 return nil;
 }
 return #@string.substr(0, #@prev_pos);
 }
end

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# File 'opal/stdlib/strscan.rb', line 277
def reset
 @working = @string
 @matched = nil
 @pos = 0
end

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# File 'opal/stdlib/strscan.rb', line 283
def rest
 @working
end

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# File 'opal/stdlib/strscan.rb', line 287
def rest?
 `#@working.length !== 0`
end

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# File 'opal/stdlib/strscan.rb', line 291
def rest_size
 rest.size
end

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# File 'opal/stdlib/strscan.rb', line 21
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

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# File 'opal/stdlib/strscan.rb', line 51
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) {
 return #@matched = nil;
 }
 continue;
 }
 #@matched = #@string.substr(#@pos, pos - #@pos - 1 + result[0].length);
 #@prev_pos = pos - 1;
 #@pos = pos;
 #@working = working.substr(result[0].length);
 return #@matched;
 }
 }
end

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# File 'opal/stdlib/strscan.rb', line 160
def skip(pattern)
 pattern = anchor(pattern)
 %x{
 var result = pattern.exec(#@working);
 if (result == null) {
 return #@matched = nil;
 }
 else {
 var match_str = result[0];
 var match_len = match_str.length;
 #@matched = match_str;
 #@prev_pos = #@pos;
 #@pos += match_len;
 #@working = #@working.substring(match_len);
 return match_len;
 }
 }
end

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# File 'opal/stdlib/strscan.rb', line 183
def skip_until(pattern)
 %x{
 var result = #{scan_until(pattern)};
 if (result === nil) {
 return nil;
 }
 else {
 #@matched = result.substr(-1);
 return result.length;
 }
 }
end

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# File 'opal/stdlib/strscan.rb', line 295
def terminate
 @match = nil
 self.pos = @string.length
end

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# File 'opal/stdlib/strscan.rb', line 300
def unscan
 @pos = @prev_pos
 @prev_pos = nil
 @match = nil
 self
end