1 | 'use strict';
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2 | const align = {
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3 | right: alignRight,
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4 | center: alignCenter
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5 | };
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6 | const top = 0;
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7 | const right = 1;
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8 | const bottom = 2;
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9 | const left = 3;
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10 | export class UI {
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11 | constructor(opts) {
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12 | var _a;
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13 | this.width = opts.width;
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14 | this.wrap = (_a = opts.wrap) !== null && _a !== void 0 ? _a : true;
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15 | this.rows = [];
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16 | }
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17 | span(...args) {
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18 | const cols = this.div(...args);
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19 | cols.span = true;
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20 | }
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21 | resetOutput() {
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22 | this.rows = [];
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23 | }
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24 | div(...args) {
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25 | if (args.length === 0) {
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26 | this.div('');
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27 | }
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28 | if (this.wrap && this.shouldApplyLayoutDSL(...args) && typeof args[0] === 'string') {
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29 | return this.applyLayoutDSL(args[0]);
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30 | }
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31 | const cols = args.map(arg => {
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32 | if (typeof arg === 'string') {
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33 | return this.colFromString(arg);
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34 | }
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35 | return arg;
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36 | });
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37 | this.rows.push(cols);
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38 | return cols;
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39 | }
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40 | shouldApplyLayoutDSL(...args) {
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41 | return args.length === 1 && typeof args[0] === 'string' &&
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42 | /[\t\n]/.test(args[0]);
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43 | }
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44 | applyLayoutDSL(str) {
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45 | const rows = str.split('\n').map(row => row.split('\t'));
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46 | let leftColumnWidth = 0;
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47 | // simple heuristic for layout, make sure the
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48 | // second column lines up along the left-hand.
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49 | // don't allow the first column to take up more
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50 | // than 50% of the screen.
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51 | rows.forEach(columns => {
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52 | if (columns.length > 1 && mixin.stringWidth(columns[0]) > leftColumnWidth) {
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53 | leftColumnWidth = Math.min(Math.floor(this.width * 0.5), mixin.stringWidth(columns[0]));
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54 | }
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55 | });
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56 | // generate a table:
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57 | // replacing ' ' with padding calculations.
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58 | // using the algorithmically generated width.
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59 | rows.forEach(columns => {
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60 | this.div(...columns.map((r, i) => {
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61 | return {
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62 | text: r.trim(),
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63 | padding: this.measurePadding(r),
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64 | width: (i === 0 && columns.length > 1) ? leftColumnWidth : undefined
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65 | };
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66 | }));
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67 | });
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68 | return this.rows[this.rows.length - 1];
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69 | }
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70 | colFromString(text) {
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71 | return {
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72 | text,
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73 | padding: this.measurePadding(text)
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74 | };
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75 | }
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76 | measurePadding(str) {
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77 | // measure padding without ansi escape codes
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78 | const noAnsi = mixin.stripAnsi(str);
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79 | return [0, noAnsi.match(/\s*$/)[0].length, 0, noAnsi.match(/^\s*/)[0].length];
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80 | }
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81 | toString() {
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82 | const lines = [];
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83 | this.rows.forEach(row => {
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84 | this.rowToString(row, lines);
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85 | });
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86 | // don't display any lines with the
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87 | // hidden flag set.
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88 | return lines
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89 | .filter(line => !line.hidden)
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90 | .map(line => line.text)
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91 | .join('\n');
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92 | }
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93 | rowToString(row, lines) {
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94 | this.rasterize(row).forEach((rrow, r) => {
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95 | let str = '';
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96 | rrow.forEach((col, c) => {
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97 | const { width } = row[c]; // the width with padding.
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98 | const wrapWidth = this.negatePadding(row[c]); // the width without padding.
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99 | let ts = col; // temporary string used during alignment/padding.
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100 | if (wrapWidth > mixin.stringWidth(col)) {
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101 | ts += ' '.repeat(wrapWidth - mixin.stringWidth(col));
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102 | }
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103 | // align the string within its column.
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104 | if (row[c].align && row[c].align !== 'left' && this.wrap) {
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105 | const fn = align[row[c].align];
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106 | ts = fn(ts, wrapWidth);
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107 | if (mixin.stringWidth(ts) < wrapWidth) {
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108 | ts += ' '.repeat((width || 0) - mixin.stringWidth(ts) - 1);
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109 | }
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110 | }
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111 | // apply border and padding to string.
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112 | const padding = row[c].padding || [0, 0, 0, 0];
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113 | if (padding[left]) {
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114 | str += ' '.repeat(padding[left]);
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115 | }
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116 | str += addBorder(row[c], ts, '| ');
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117 | str += ts;
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118 | str += addBorder(row[c], ts, ' |');
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119 | if (padding[right]) {
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120 | str += ' '.repeat(padding[right]);
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121 | }
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122 | // if prior row is span, try to render the
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123 | // current row on the prior line.
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124 | if (r === 0 && lines.length > 0) {
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125 | str = this.renderInline(str, lines[lines.length - 1]);
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126 | }
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127 | });
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128 | // remove trailing whitespace.
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129 | lines.push({
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130 | text: str.replace(/ +$/, ''),
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131 | span: row.span
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132 | });
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133 | });
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134 | return lines;
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135 | }
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136 | // if the full 'source' can render in
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137 | // the target line, do so.
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138 | renderInline(source, previousLine) {
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139 | const match = source.match(/^ */);
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140 | const leadingWhitespace = match ? match[0].length : 0;
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141 | const target = previousLine.text;
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142 | const targetTextWidth = mixin.stringWidth(target.trimRight());
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143 | if (!previousLine.span) {
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144 | return source;
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145 | }
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146 | // if we're not applying wrapping logic,
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147 | // just always append to the span.
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148 | if (!this.wrap) {
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149 | previousLine.hidden = true;
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150 | return target + source;
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151 | }
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152 | if (leadingWhitespace < targetTextWidth) {
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153 | return source;
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154 | }
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155 | previousLine.hidden = true;
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156 | return target.trimRight() + ' '.repeat(leadingWhitespace - targetTextWidth) + source.trimLeft();
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157 | }
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158 | rasterize(row) {
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159 | const rrows = [];
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160 | const widths = this.columnWidths(row);
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161 | let wrapped;
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162 | // word wrap all columns, and create
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163 | // a data-structure that is easy to rasterize.
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164 | row.forEach((col, c) => {
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165 | // leave room for left and right padding.
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166 | col.width = widths[c];
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167 | if (this.wrap) {
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168 | wrapped = mixin.wrap(col.text, this.negatePadding(col), { hard: true }).split('\n');
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169 | }
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170 | else {
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171 | wrapped = col.text.split('\n');
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172 | }
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173 | if (col.border) {
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174 | wrapped.unshift('.' + '-'.repeat(this.negatePadding(col) + 2) + '.');
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175 | wrapped.push("'" + '-'.repeat(this.negatePadding(col) + 2) + "'");
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176 | }
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177 | // add top and bottom padding.
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178 | if (col.padding) {
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179 | wrapped.unshift(...new Array(col.padding[top] || 0).fill(''));
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180 | wrapped.push(...new Array(col.padding[bottom] || 0).fill(''));
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181 | }
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182 | wrapped.forEach((str, r) => {
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183 | if (!rrows[r]) {
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184 | rrows.push([]);
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185 | }
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186 | const rrow = rrows[r];
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187 | for (let i = 0; i < c; i++) {
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188 | if (rrow[i] === undefined) {
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189 | rrow.push('');
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190 | }
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191 | }
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192 | rrow.push(str);
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193 | });
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194 | });
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195 | return rrows;
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196 | }
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197 | negatePadding(col) {
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198 | let wrapWidth = col.width || 0;
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199 | if (col.padding) {
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200 | wrapWidth -= (col.padding[left] || 0) + (col.padding[right] || 0);
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201 | }
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202 | if (col.border) {
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203 | wrapWidth -= 4;
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204 | }
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205 | return wrapWidth;
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206 | }
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207 | columnWidths(row) {
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208 | if (!this.wrap) {
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209 | return row.map(col => {
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210 | return col.width || mixin.stringWidth(col.text);
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211 | });
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212 | }
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213 | let unset = row.length;
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214 | let remainingWidth = this.width;
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215 | // column widths can be set in config.
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216 | const widths = row.map(col => {
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217 | if (col.width) {
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218 | unset--;
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219 | remainingWidth -= col.width;
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220 | return col.width;
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221 | }
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222 | return undefined;
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223 | });
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224 | // any unset widths should be calculated.
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225 | const unsetWidth = unset ? Math.floor(remainingWidth / unset) : 0;
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226 | return widths.map((w, i) => {
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227 | if (w === undefined) {
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228 | return Math.max(unsetWidth, _minWidth(row[i]));
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229 | }
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230 | return w;
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231 | });
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232 | }
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233 | }
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234 | function addBorder(col, ts, style) {
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235 | if (col.border) {
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236 | if (/[.']-+[.']/.test(ts)) {
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237 | return '';
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238 | }
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239 | if (ts.trim().length !== 0) {
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240 | return style;
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241 | }
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242 | return ' ';
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243 | }
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244 | return '';
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245 | }
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246 | // calculates the minimum width of
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247 | // a column, based on padding preferences.
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248 | function _minWidth(col) {
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249 | const padding = col.padding || [];
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250 | const minWidth = 1 + (padding[left] || 0) + (padding[right] || 0);
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251 | if (col.border) {
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252 | return minWidth + 4;
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253 | }
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254 | return minWidth;
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255 | }
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256 | function getWindowWidth() {
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257 | /* istanbul ignore next: depends on terminal */
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258 | if (typeof process === 'object' && process.stdout && process.stdout.columns) {
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259 | return process.stdout.columns;
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260 | }
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261 | return 80;
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262 | }
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263 | function alignRight(str, width) {
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264 | str = str.trim();
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265 | const strWidth = mixin.stringWidth(str);
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266 | if (strWidth < width) {
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267 | return ' '.repeat(width - strWidth) + str;
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268 | }
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269 | return str;
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270 | }
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271 | function alignCenter(str, width) {
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272 | str = str.trim();
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273 | const strWidth = mixin.stringWidth(str);
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274 | /* istanbul ignore next */
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275 | if (strWidth >= width) {
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276 | return str;
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277 | }
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278 | return ' '.repeat((width - strWidth) >> 1) + str;
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279 | }
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280 | let mixin;
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281 | export function cliui(opts, _mixin) {
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282 | mixin = _mixin;
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283 | return new UI({
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284 | width: (opts === null || opts === void 0 ? void 0 : opts.width) || getWindowWidth(),
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285 | wrap: opts === null || opts === void 0 ? void 0 : opts.wrap
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286 | });
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287 | }
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