FilesExpand file tree

quieten-test-output

/

index.js

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

354 lines (286 loc) · 7.97 KB

quieten-test-output

/

index.js

Copy path

Top

File metadata and controls

• Code
• Blame

354 lines (286 loc) · 7.97 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

'use strict'

const stringWidth = require('string-width')

const stripAnsi = require('strip-ansi')

const wrap = require('wrap-ansi')

const align = {

right: alignRight,

center: alignCenter

}

const top = 0

const right = 1

const bottom = 2

const left = 3

class UI {

constructor (opts) {

this.width = opts.width

this.wrap = opts.wrap

this.rows = []

}

span (...args) {

const cols = this.div(...args)

cols.span = true

}

resetOutput () {

this.rows = []

}

div (...args) {

if (args.length === 0) {

this.div('')

}

if (this.wrap && this._shouldApplyLayoutDSL(...args)) {

return this._applyLayoutDSL(args[0])

}

const cols = args.map(arg => {

if (typeof arg === 'string') {

return this._colFromString(arg)

}

return arg

})

this.rows.push(cols)

return cols

}

_shouldApplyLayoutDSL (...args) {

return args.length === 1 && typeof args[0] === 'string' &&

/[\t\n]/.test(args[0])

}

_applyLayoutDSL (str) {

const rows = str.split('\n').map(row => row.split('\t'))

let leftColumnWidth = 0

// simple heuristic for layout, make sure the

// second column lines up along the left-hand.

// don't allow the first column to take up more

// than 50% of the screen.

rows.forEach(columns => {

if (columns.length > 1 && stringWidth(columns[0]) > leftColumnWidth) {

leftColumnWidth = Math.min(

Math.floor(this.width * 0.5),

stringWidth(columns[0])

)

}

})

// generate a table:

// replacing ' ' with padding calculations.

// using the algorithmically generated width.

rows.forEach(columns => {

this.div(...columns.map((r, i) => {

return {

text: r.trim(),

padding: this._measurePadding(r),

width: (i === 0 && columns.length > 1) ? leftColumnWidth : undefined

}

}))

})

return this.rows[this.rows.length - 1]

}

_colFromString (text) {

return {

text,

padding: this._measurePadding(text)

}

}

_measurePadding (str) {

// measure padding without ansi escape codes

const noAnsi = stripAnsi(str)

return [0, noAnsi.match(/\s*$/)[0].length, 0, noAnsi.match(/^\s*/)[0].length]

}

toString () {

const lines = []

this.rows.forEach(row => {

this.rowToString(row, lines)

})

// don't display any lines with the

// hidden flag set.

return lines

.filter(line => !line.hidden)

.map(line => line.text)

.join('\n')

}

rowToString (row, lines) {

this._rasterize(row).forEach((rrow, r) => {

let str = ''

rrow.forEach((col, c) => {

const { width } = row[c] // the width with padding.

const wrapWidth = this._negatePadding(row[c]) // the width without padding.

let ts = col // temporary string used during alignment/padding.

if (wrapWidth > stringWidth(col)) {

ts += ' '.repeat(wrapWidth - stringWidth(col))

}

// align the string within its column.

if (row[c].align && row[c].align !== 'left' && this.wrap) {

ts = align[row[c].align](ts, wrapWidth)

if (stringWidth(ts) < wrapWidth) {

ts += ' '.repeat(width - stringWidth(ts) - 1)

}

}

// apply border and padding to string.

const padding = row[c].padding || [0, 0, 0, 0]

if (padding[left]) {

str += ' '.repeat(padding[left])

}

str += addBorder(row[c], ts, '| ')

str += ts

str += addBorder(row[c], ts, ' |')

if (padding[right]) {

str += ' '.repeat(padding[right])

}

// if prior row is span, try to render the

// current row on the prior line.

if (r === 0 && lines.length > 0) {

str = this._renderInline(str, lines[lines.length - 1])

}

})

// remove trailing whitespace.

lines.push({

text: str.replace(/ +$/, ''),

span: row.span

})

})

return lines

}

// if the full 'source' can render in

// the target line, do so.

_renderInline (source, previousLine) {

const leadingWhitespace = source.match(/^ */)[0].length

const target = previousLine.text

const targetTextWidth = stringWidth(target.trimRight())

if (!previousLine.span) {

return source

}

// if we're not applying wrapping logic,

// just always append to the span.

if (!this.wrap) {

previousLine.hidden = true

return target + source

}

if (leadingWhitespace < targetTextWidth) {

return source

}

previousLine.hidden = true

return target.trimRight() + ' '.repeat(leadingWhitespace - targetTextWidth) + source.trimLeft()

}

_rasterize (row) {

const rrows = []

const widths = this._columnWidths(row)

let wrapped

// word wrap all columns, and create

// a data-structure that is easy to rasterize.

row.forEach((col, c) => {

// leave room for left and right padding.

col.width = widths[c]

if (this.wrap) {

wrapped = wrap(col.text, this._negatePadding(col), { hard: true }).split('\n')

} else {

wrapped = col.text.split('\n')

}

if (col.border) {

wrapped.unshift('.' + '-'.repeat(this._negatePadding(col) + 2) + '.')

wrapped.push("'" + '-'.repeat(this._negatePadding(col) + 2) + "'")

}

// add top and bottom padding.

if (col.padding) {

wrapped.unshift(...new Array(col.padding[top] || 0).fill(''))

wrapped.push(...new Array(col.padding[bottom] || 0).fill(''))

}

wrapped.forEach((str, r) => {

if (!rrows[r]) {

rrows.push([])

}

const rrow = rrows[r]

for (let i = 0; i < c; i++) {

if (rrow[i] === undefined) {

rrow.push('')

}

}

rrow.push(str)

})

})

return rrows

}

_negatePadding (col) {

let wrapWidth = col.width

if (col.padding) {

wrapWidth -= (col.padding[left] || 0) + (col.padding[right] || 0)

}

if (col.border) {

wrapWidth -= 4

}

return wrapWidth

}

_columnWidths (row) {

if (!this.wrap) {

return row.map(col => {

return col.width || stringWidth(col.text)

})

}

let unset = row.length

let remainingWidth = this.width

// column widths can be set in config.

const widths = row.map(col => {

if (col.width) {

unset--

remainingWidth -= col.width

return col.width

}

return undefined

})

// any unset widths should be calculated.

const unsetWidth = unset ? Math.floor(remainingWidth / unset) : 0

return widths.map((w, i) => {

if (w === undefined) {

return Math.max(unsetWidth, _minWidth(row[i]))

}

return w

})

}

}

function addBorder (col, ts, style) {

if (col.border) {

if (/[.']-+[.']/.test(ts)) {

return ''

}

if (ts.trim().length !== 0) {

return style

}

return ' '

}

return ''

}

// calculates the minimum width of

// a column, based on padding preferences.

function _minWidth (col) {

const padding = col.padding || []

const minWidth = 1 + (padding[left] || 0) + (padding[right] || 0)

if (col.border) {

return minWidth + 4

}

return minWidth

}

function getWindowWidth () {

/* istanbul ignore next: depends on terminal */

if (typeof process === 'object' && process.stdout && process.stdout.columns) {

return process.stdout.columns

}

}

function alignRight (str, width) {

str = str.trim()

const strWidth = stringWidth(str)

if (strWidth < width) {

return ' '.repeat(width - strWidth) + str

}

return str

}

function alignCenter (str, width) {

str = str.trim()

const strWidth = stringWidth(str)

/* istanbul ignore next */

if (strWidth >= width) {

return str

}

return ' '.repeat((width - strWidth) >> 1) + str

}

module.exports = function (opts = {}) {

return new UI({

width: opts.width || getWindowWidth() || /* istanbul ignore next */ 80,

wrap: opts.wrap !== false

})

}