scratch – Blame information for rev 75
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Rev | Author | Line No. | Line |
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75 | office | 1 | |
2 | Pattern = require './Pattern' |
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3 | |||
4 | # Escaper encapsulates escaping rules for single |
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5 | # and double-quoted YAML strings. |
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6 | class Escaper |
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7 | |||
8 | # Mapping arrays for escaping a double quoted string. The backslash is |
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9 | # first to ensure proper escaping. |
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10 | @LIST_ESCAPEES: ['\\', '\\\\', '\\"', '"', |
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11 | "\x00", "\x01", "\x02", "\x03", "\x04", "\x05", "\x06", "\x07", |
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12 | "\x08", "\x09", "\x0a", "\x0b", "\x0c", "\x0d", "\x0e", "\x0f", |
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13 | "\x10", "\x11", "\x12", "\x13", "\x14", "\x15", "\x16", "\x17", |
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14 | "\x18", "\x19", "\x1a", "\x1b", "\x1c", "\x1d", "\x1e", "\x1f", |
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15 | (ch = String.fromCharCode)(0x0085), ch(0x00A0), ch(0x2028), ch(0x2029)] |
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16 | @LIST_ESCAPED: ['\\\\', '\\"', '\\"', '\\"', |
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17 | "\\0", "\\x01", "\\x02", "\\x03", "\\x04", "\\x05", "\\x06", "\\a", |
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18 | "\\b", "\\t", "\\n", "\\v", "\\f", "\\r", "\\x0e", "\\x0f", |
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19 | "\\x10", "\\x11", "\\x12", "\\x13", "\\x14", "\\x15", "\\x16", "\\x17", |
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20 | "\\x18", "\\x19", "\\x1a", "\\e", "\\x1c", "\\x1d", "\\x1e", "\\x1f", |
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21 | "\\N", "\\_", "\\L", "\\P"] |
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22 | |||
23 | @MAPPING_ESCAPEES_TO_ESCAPED: do => |
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24 | mapping = {} |
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25 | for i in [0...@LIST_ESCAPEES.length] |
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26 | mapping[@LIST_ESCAPEES[i]] = @LIST_ESCAPED[i] |
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27 | return mapping |
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28 | |||
29 | # Characters that would cause a dumped string to require double quoting. |
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30 | @PATTERN_CHARACTERS_TO_ESCAPE: new Pattern '[\\x00-\\x1f]|\xc2\x85|\xc2\xa0|\xe2\x80\xa8|\xe2\x80\xa9' |
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31 | |||
32 | # Other precompiled patterns |
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33 | @PATTERN_MAPPING_ESCAPEES: new Pattern @LIST_ESCAPEES.join('|').split('\\').join('\\\\') |
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34 | @PATTERN_SINGLE_QUOTING: new Pattern '[\\s\'":{}[\\],&*#?]|^[-?|<>=!%@`]' |
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35 | |||
36 | |||
37 | |||
38 | # Determines if a JavaScript value would require double quoting in YAML. |
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39 | # |
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40 | # @param [String] value A JavaScript value value |
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41 | # |
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42 | # @return [Boolean] true if the value would require double quotes. |
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43 | # |
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44 | @requiresDoubleQuoting: (value) -> |
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45 | return @PATTERN_CHARACTERS_TO_ESCAPE.test value |
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46 | |||
47 | |||
48 | # Escapes and surrounds a JavaScript value with double quotes. |
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49 | # |
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50 | # @param [String] value A JavaScript value |
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51 | # |
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52 | # @return [String] The quoted, escaped string |
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53 | # |
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54 | @escapeWithDoubleQuotes: (value) -> |
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55 | result = @PATTERN_MAPPING_ESCAPEES.replace value, (str) => |
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56 | return @MAPPING_ESCAPEES_TO_ESCAPED[str] |
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57 | return '"'+result+'"' |
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58 | |||
59 | |||
60 | # Determines if a JavaScript value would require single quoting in YAML. |
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61 | # |
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62 | # @param [String] value A JavaScript value |
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63 | # |
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64 | # @return [Boolean] true if the value would require single quotes. |
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65 | # |
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66 | @requiresSingleQuoting: (value) -> |
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67 | return @PATTERN_SINGLE_QUOTING.test value |
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68 | |||
69 | |||
70 | # Escapes and surrounds a JavaScript value with single quotes. |
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71 | # |
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72 | # @param [String] value A JavaScript value |
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73 | # |
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74 | # @return [String] The quoted, escaped string |
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75 | # |
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76 | @escapeWithSingleQuotes: (value) -> |
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77 | return "'"+value.replace(/'/g, "''")+"'" |
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78 | |||
79 | |||
80 | module.exports = Escaper |