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22 | 'use strict';
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23 |
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24 | var _fonts = require('../../core/fonts');
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25 |
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26 | var checkProblematicCharRanges = function checkProblematicCharRanges() {
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27 | function printRange(limits) {
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28 | return '[' + limits.lower.toString('16').toUpperCase() + ', ' + limits.upper.toString('16').toUpperCase() + ')';
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29 | }
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30 | var numRanges = _fonts.ProblematicCharRanges.length;
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31 | if (numRanges % 2 !== 0) {
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32 | throw new Error('Char ranges must contain an even number of elements.');
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33 | }
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34 | var prevLimits,
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35 | numChars = 0;
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36 | for (var i = 0; i < numRanges; i += 2) {
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37 | var limits = {
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38 | lower: _fonts.ProblematicCharRanges[i],
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39 | upper: _fonts.ProblematicCharRanges[i + 1]
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40 | };
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41 | if (!Number.isInteger(limits.lower) || !Number.isInteger(limits.upper)) {
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42 | throw new Error('Range endpoints must be integers: ' + printRange(limits));
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43 | }
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44 | if (limits.lower < 0 || limits.upper < 0) {
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45 | throw new Error('Range endpoints must be non-negative: ' + printRange(limits));
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46 | }
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47 | var range = limits.upper - limits.lower;
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48 | if (range < 1) {
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49 | throw new Error('Range must contain at least one element: ' + printRange(limits));
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50 | }
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51 | if (prevLimits) {
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52 | if (limits.lower < prevLimits.lower) {
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53 | throw new Error('Ranges must be sorted in ascending order: ' + printRange(limits) + ', ' + printRange(prevLimits));
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54 | }
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55 | if (limits.lower < prevLimits.upper) {
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56 | throw new Error('Ranges must not overlap: ' + printRange(limits) + ', ' + printRange(prevLimits));
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57 | }
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58 | }
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59 | prevLimits = {
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60 | lower: limits.lower,
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61 | upper: limits.upper
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62 | };
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63 | numChars += range;
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64 | }
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65 | var puaLength = _fonts.PRIVATE_USE_OFFSET_END + 1 - _fonts.PRIVATE_USE_OFFSET_START;
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66 | if (numChars > puaLength) {
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67 | throw new Error('Total number of chars must not exceed the PUA length.');
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68 | }
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69 | return {
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70 | numChars: numChars,
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71 | puaLength: puaLength,
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72 | percentage: 100 * (numChars / puaLength)
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73 | };
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74 | };
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75 | describe('Fonts', function () {
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76 | it('checkProblematicCharRanges', function () {
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77 | var EXPECTED_PERCENTAGE = 100;
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78 | var result = checkProblematicCharRanges();
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79 | expect(result.percentage).toBeLessThan(EXPECTED_PERCENTAGE);
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80 | });
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81 | }); |
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