1 | import { __read, __spreadArray } from "tslib";
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2 | import { isString, memoize, values, toString } from '@antv/util';
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3 | import { getCanvasContext } from './context';
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4 |
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5 |
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6 |
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7 | export var measureTextWidth = memoize(function (text, font) {
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8 | if (font === void 0) { font = {}; }
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9 | var fontSize = font.fontSize, fontFamily = font.fontFamily, fontWeight = font.fontWeight, fontStyle = font.fontStyle, fontVariant = font.fontVariant;
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10 | var ctx = getCanvasContext();
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11 | ctx.font = [fontStyle, fontVariant, fontWeight, "".concat(fontSize, "px"), fontFamily].join(' ');
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12 | return ctx.measureText(isString(text) ? text : '').width;
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13 | }, function (text, font) {
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14 | if (font === void 0) { font = {}; }
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15 | return __spreadArray([text], __read(values(font)), false).join('');
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16 | });
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17 |
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18 |
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19 |
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20 |
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21 |
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22 |
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23 |
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24 |
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25 |
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26 | export var getEllipsisText = function (text, maxWidth, font) {
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27 | var STEP = 16;
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28 | var DOT_WIDTH = measureTextWidth('...', font);
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29 | var leftText;
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30 | if (!isString(text)) {
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31 | leftText = toString(text);
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32 | }
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33 | else {
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34 | leftText = text;
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35 | }
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36 | var leftWidth = maxWidth;
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37 | var r = [];
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38 | var currentText;
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39 | var currentWidth;
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40 | if (measureTextWidth(text, font) <= maxWidth) {
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41 | return text;
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42 | }
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43 |
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44 | while (true) {
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45 |
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46 | currentText = leftText.substr(0, STEP);
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47 |
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48 | currentWidth = measureTextWidth(currentText, font);
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49 |
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50 | if (currentWidth + DOT_WIDTH > leftWidth) {
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51 | if (currentWidth > leftWidth) {
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52 | break;
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53 | }
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54 | }
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55 | r.push(currentText);
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56 |
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57 | leftWidth -= currentWidth;
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58 | leftText = leftText.substr(STEP);
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59 |
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60 | if (!leftText) {
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61 | return r.join('');
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62 | }
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63 | }
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64 |
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65 | while (true) {
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66 |
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67 | currentText = leftText.substr(0, 1);
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68 |
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69 | currentWidth = measureTextWidth(currentText, font);
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70 |
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71 | if (currentWidth + DOT_WIDTH > leftWidth) {
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72 | break;
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73 | }
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74 | r.push(currentText);
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75 |
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76 | leftWidth -= currentWidth;
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77 | leftText = leftText.substr(1);
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78 | if (!leftText) {
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79 | return r.join('');
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80 | }
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81 | }
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82 | return "".concat(r.join(''), "...");
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83 | };
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84 |
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