source: frontend/node_modules/postcss-calc/src/parser.jison

Last change on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 12 days ago

Fix frontend appearance
  • Property mode set to 100644
File size: 5.8 KB
Line 
1/* description: Parses expressions. */
2
3/* lexical grammar */
4%lex
5
6%options case-insensitive
7
8%%
9\s+ /* skip whitespace */
10
11(\-(webkit|moz)\-)?calc\b return 'CALC';
12
13[a-z][a-z0-9-]*\s*\((?:(?:\"(?:\\.|[^\"\\])*\"|\'(?:\\.|[^\'\\])*\')|\([^)]*\)|[^\(\)]*)*\) return 'FUNCTION';
14
15"*" return 'MUL';
16"/" return 'DIV';
17"+" return 'ADD';
18"-" return 'SUB';
19
20(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)em\b return 'EMS';
21(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)ex\b return 'EXS';
22(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)ch\b return 'CHS';
23(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)rem\b return 'REMS';
24(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)vw\b return 'VWS';
25(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)vh\b return 'VHS';
26(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)vmin\b return 'VMINS';
27(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)vmax\b return 'VMAXS';
28(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)cm\b return 'LENGTH';
29(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)mm\b return 'LENGTH';
30(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)Q\b return 'LENGTH';
31(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)in\b return 'LENGTH';
32(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)pt\b return 'LENGTH';
33(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)pc\b return 'LENGTH';
34(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)px\b return 'LENGTH';
35(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)deg\b return 'ANGLE';
36(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)grad\b return 'ANGLE';
37(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)rad\b return 'ANGLE';
38(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)turn\b return 'ANGLE';
39(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)s\b return 'TIME';
40(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)ms\b return 'TIME';
41(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)Hz\b return 'FREQ';
42(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)kHz\b return 'FREQ';
43(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)dpi\b return 'RES';
44(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)dpcm\b return 'RES';
45(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)dppx\b return 'RES';
46(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)\% return 'PERCENTAGE';
47(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)\b return 'NUMBER';
48
49(([0-9]+("."[0-9]+)?|"."[0-9]+)(e(\+|-)[0-9]+)?)-?([a-zA-Z_]|[\240-\377]|(\\[0-9a-fA-F]{1,6}(\r\n|[ \t\r\n\f])?|\\[^\r\n\f0-9a-fA-F]))([a-zA-Z0-9_-]|[\240-\377]|(\\[0-9a-fA-F]{1,6}(\r\n|[ \t\r\n\f])?|\\[^\r\n\f0-9a-fA-F]))*\b return 'UNKNOWN_DIMENSION';
50
51"(" return 'LPAREN';
52")" return 'RPAREN';
53
54<<EOF>> return 'EOF';
55
56/lex
57
58%left ADD SUB
59%left MUL DIV
60%left UPREC
61
62
63%start expression
64
65%%
66
67expression
68 : math_expression EOF { return $1; }
69 ;
70
71 math_expression
72 : CALC LPAREN math_expression RPAREN { $$ = $3; }
73 | math_expression ADD math_expression { $$ = { type: 'MathExpression', operator: $2, left: $1, right: $3 }; }
74 | math_expression SUB math_expression { $$ = { type: 'MathExpression', operator: $2, left: $1, right: $3 }; }
75 | math_expression MUL math_expression { $$ = { type: 'MathExpression', operator: $2, left: $1, right: $3 }; }
76 | math_expression DIV math_expression { $$ = { type: 'MathExpression', operator: $2, left: $1, right: $3 }; }
77 | LPAREN math_expression RPAREN { $$ = { type: 'ParenthesizedExpression', content: $2 }; }
78 | function { $$ = $1; }
79 | dimension { $$ = $1; }
80 | number { $$ = $1; }
81 ;
82
83 function
84 : FUNCTION { $$ = { type: 'Function', value: $1 }; }
85 ;
86
87 dimension
88 : LENGTH { $$ = { type: 'LengthValue', value: parseFloat($1), unit: /[a-z]+$/i.exec($1)[0] }; }
89 | ANGLE { $$ = { type: 'AngleValue', value: parseFloat($1), unit: /[a-z]+$/i.exec($1)[0] }; }
90 | TIME { $$ = { type: 'TimeValue', value: parseFloat($1), unit: /[a-z]+$/i.exec($1)[0] }; }
91 | FREQ { $$ = { type: 'FrequencyValue', value: parseFloat($1), unit: /[a-z]+$/i.exec($1)[0] }; }
92 | RES { $$ = { type: 'ResolutionValue', value: parseFloat($1), unit: /[a-z]+$/i.exec($1)[0] }; }
93 | UNKNOWN_DIMENSION { $$ = { type: 'UnknownDimension', value: parseFloat($1), unit: /[a-z]+$/i.exec($1)[0] }; }
94 | EMS { $$ = { type: 'EmValue', value: parseFloat($1), unit: 'em' }; }
95 | EXS { $$ = { type: 'ExValue', value: parseFloat($1), unit: 'ex' }; }
96 | CHS { $$ = { type: 'ChValue', value: parseFloat($1), unit: 'ch' }; }
97 | REMS { $$ = { type: 'RemValue', value: parseFloat($1), unit: 'rem' }; }
98 | VHS { $$ = { type: 'VhValue', value: parseFloat($1), unit: 'vh' }; }
99 | VWS { $$ = { type: 'VwValue', value: parseFloat($1), unit: 'vw' }; }
100 | VMINS { $$ = { type: 'VminValue', value: parseFloat($1), unit: 'vmin' }; }
101 | VMAXS { $$ = { type: 'VmaxValue', value: parseFloat($1), unit: 'vmax' }; }
102 | PERCENTAGE { $$ = { type: 'PercentageValue', value: parseFloat($1), unit: '%' }; }
103 | ADD dimension { var prev = $2; $$ = prev; }
104 | SUB dimension { var prev = $2; prev.value *= -1; $$ = prev; }
105 ;
106
107 number
108 : NUMBER { $$ = { type: 'Number', value: parseFloat($1) }; }
109 | ADD NUMBER { $$ = { type: 'Number', value: parseFloat($2) }; }
110 | SUB NUMBER { $$ = { type: 'Number', value: parseFloat($2) * -1 }; }
111 ;
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