1 | var override = require('../utils/override');
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2 |
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3 | var INTEGER_PATTERN = /^\d+$/;
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4 |
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5 | var ALL_UNITS = ['*', 'all'];
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6 | var DEFAULT_PRECISION = 'off';
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7 | var DIRECTIVES_SEPARATOR = ',';
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8 | var DIRECTIVE_VALUE_SEPARATOR = '=';
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9 |
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10 | function roundingPrecisionFrom(source) {
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11 | return override(defaults(DEFAULT_PRECISION), buildPrecisionFrom(source));
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12 | }
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13 |
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14 | function defaults(value) {
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15 | return {
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16 | 'ch': value,
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17 | 'cm': value,
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18 | 'em': value,
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19 | 'ex': value,
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20 | 'in': value,
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21 | 'mm': value,
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22 | 'pc': value,
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23 | 'pt': value,
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24 | 'px': value,
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25 | 'q': value,
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26 | 'rem': value,
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27 | 'vh': value,
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28 | 'vmax': value,
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29 | 'vmin': value,
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30 | 'vw': value,
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31 | '%': value
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32 | };
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33 | }
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34 |
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35 | function buildPrecisionFrom(source) {
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36 | if (source === null || source === undefined) {
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37 | return {};
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38 | }
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39 |
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40 | if (typeof source == 'boolean') {
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41 | return {};
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42 | }
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43 |
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44 | if (typeof source == 'number' && source == -1) {
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45 | return defaults(DEFAULT_PRECISION);
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46 | }
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47 |
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48 | if (typeof source == 'number') {
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49 | return defaults(source);
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50 | }
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51 |
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52 | if (typeof source == 'string' && INTEGER_PATTERN.test(source)) {
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53 | return defaults(parseInt(source));
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54 | }
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55 |
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56 | if (typeof source == 'string' && source == DEFAULT_PRECISION) {
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57 | return defaults(DEFAULT_PRECISION);
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58 | }
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59 |
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60 | if (typeof source == 'object') {
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61 | return source;
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62 | }
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63 |
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64 | return source
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65 | .split(DIRECTIVES_SEPARATOR)
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66 | .reduce(function (accumulator, directive) {
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67 | var directiveParts = directive.split(DIRECTIVE_VALUE_SEPARATOR);
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68 | var name = directiveParts[0];
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69 | var value = parseInt(directiveParts[1]);
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70 |
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71 | if (isNaN(value) || value == -1) {
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72 | value = DEFAULT_PRECISION;
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73 | }
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74 |
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75 | if (ALL_UNITS.indexOf(name) > -1) {
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76 | accumulator = override(accumulator, defaults(value));
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77 | } else {
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78 | accumulator[name] = value;
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79 | }
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80 |
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81 | return accumulator;
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82 | }, {});
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83 | }
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84 |
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85 | module.exports = {
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86 | DEFAULT: DEFAULT_PRECISION,
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87 | roundingPrecisionFrom: roundingPrecisionFrom
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88 | };
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