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Diffstat (limited to 'node_modules/cliui/index.js')
-rw-r--r-- | node_modules/cliui/index.js | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/node_modules/cliui/index.js b/node_modules/cliui/index.js new file mode 100644 index 0000000..b42d982 --- /dev/null +++ b/node_modules/cliui/index.js @@ -0,0 +1,324 @@ +var stringWidth = require('string-width') +var stripAnsi = require('strip-ansi') +var wrap = require('wrap-ansi') +var align = { + right: alignRight, + center: alignCenter +} +var top = 0 +var right = 1 +var bottom = 2 +var left = 3 + +function UI (opts) { + this.width = opts.width + this.wrap = opts.wrap + this.rows = [] +} + +UI.prototype.span = function () { + var cols = this.div.apply(this, arguments) + cols.span = true +} + +UI.prototype.resetOutput = function () { + this.rows = [] +} + +UI.prototype.div = function () { + if (arguments.length === 0) this.div('') + if (this.wrap && this._shouldApplyLayoutDSL.apply(this, arguments)) { + return this._applyLayoutDSL(arguments[0]) + } + + var cols = [] + + for (var i = 0, arg; (arg = arguments[i]) !== undefined; i++) { + if (typeof arg === 'string') cols.push(this._colFromString(arg)) + else cols.push(arg) + } + + this.rows.push(cols) + return cols +} + +UI.prototype._shouldApplyLayoutDSL = function () { + return arguments.length === 1 && typeof arguments[0] === 'string' && + /[\t\n]/.test(arguments[0]) +} + +UI.prototype._applyLayoutDSL = function (str) { + var _this = this + var rows = str.split('\n') + var 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(function (row) { + var columns = row.split('\t') + 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(function (row) { + var columns = row.split('\t') + _this.div.apply(_this, columns.map(function (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] +} + +UI.prototype._colFromString = function (str) { + return { + text: str, + padding: this._measurePadding(str) + } +} + +UI.prototype._measurePadding = function (str) { + // measure padding without ansi escape codes + var noAnsi = stripAnsi(str) + return [0, noAnsi.match(/\s*$/)[0].length, 0, noAnsi.match(/^\s*/)[0].length] +} + +UI.prototype.toString = function () { + var _this = this + var lines = [] + + _this.rows.forEach(function (row, i) { + _this.rowToString(row, lines) + }) + + // don't display any lines with the + // hidden flag set. + lines = lines.filter(function (line) { + return !line.hidden + }) + + return lines.map(function (line) { + return line.text + }).join('\n') +} + +UI.prototype.rowToString = function (row, lines) { + var _this = this + var padding + var rrows = this._rasterize(row) + var str = '' + var ts + var width + var wrapWidth + + rrows.forEach(function (rrow, r) { + str = '' + rrow.forEach(function (col, c) { + ts = '' // temporary string used during alignment/padding. + width = row[c].width // the width with padding. + wrapWidth = _this._negatePadding(row[c]) // the width without padding. + + ts += col + + for (var i = 0; i < wrapWidth - stringWidth(col); i++) { + ts += ' ' + } + + // align the string within its column. + if (row[c].align && row[c].align !== 'left' && _this.wrap) { + ts = align[row[c].align](ts, wrapWidth) + if (stringWidth(ts) < wrapWidth) ts += new Array(width - stringWidth(ts)).join(' ') + } + + // apply border and padding to string. + padding = row[c].padding || [0, 0, 0, 0] + if (padding[left]) str += new Array(padding[left] + 1).join(' ') + str += addBorder(row[c], ts, '| ') + str += ts + str += addBorder(row[c], ts, ' |') + if (padding[right]) str += new Array(padding[right] + 1).join(' ') + + // if prior row is span, try to render the + // current row on the prior line. + if (r === 0 && lines.length > 0) { + str = _this._renderInline(str, lines[lines.length - 1]) + } + }) + + // remove trailing whitespace. + lines.push({ + text: str.replace(/ +$/, ''), + span: row.span + }) + }) + + return lines +} + +function addBorder (col, ts, style) { + if (col.border) { + if (/[.']-+[.']/.test(ts)) return '' + else if (ts.trim().length) return style + else return ' ' + } + return '' +} + +// if the full 'source' can render in +// the target line, do so. +UI.prototype._renderInline = function (source, previousLine) { + var leadingWhitespace = source.match(/^ */)[0].length + var target = previousLine.text + var 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() + new Array(leadingWhitespace - targetTextWidth + 1).join(' ') + source.trimLeft() +} + +UI.prototype._rasterize = function (row) { + var _this = this + var i + var rrow + var rrows = [] + var widths = this._columnWidths(row) + var wrapped + + // word wrap all columns, and create + // a data-structure that is easy to rasterize. + row.forEach(function (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('.' + new Array(_this._negatePadding(col) + 3).join('-') + '.') + wrapped.push("'" + new Array(_this._negatePadding(col) + 3).join('-') + "'") + } + + // add top and bottom padding. + if (col.padding) { + for (i = 0; i < (col.padding[top] || 0); i++) wrapped.unshift('') + for (i = 0; i < (col.padding[bottom] || 0); i++) wrapped.push('') + } + + wrapped.forEach(function (str, r) { + if (!rrows[r]) rrows.push([]) + + rrow = rrows[r] + + for (var i = 0; i < c; i++) { + if (rrow[i] === undefined) rrow.push('') + } + rrow.push(str) + }) + }) + + return rrows +} + +UI.prototype._negatePadding = function (col) { + var wrapWidth = col.width + if (col.padding) wrapWidth -= (col.padding[left] || 0) + (col.padding[right] || 0) + if (col.border) wrapWidth -= 4 + return wrapWidth +} + +UI.prototype._columnWidths = function (row) { + var _this = this + var widths = [] + var unset = row.length + var unsetWidth + var remainingWidth = this.width + + // column widths can be set in config. + row.forEach(function (col, i) { + if (col.width) { + unset-- + widths[i] = col.width + remainingWidth -= col.width + } else { + widths[i] = undefined + } + }) + + // any unset widths should be calculated. + if (unset) unsetWidth = Math.floor(remainingWidth / unset) + widths.forEach(function (w, i) { + if (!_this.wrap) widths[i] = row[i].width || stringWidth(row[i].text) + else if (w === undefined) widths[i] = Math.max(unsetWidth, _minWidth(row[i])) + }) + + return widths +} + +// calculates the minimum width of +// a column, based on padding preferences. +function _minWidth (col) { + var padding = col.padding || [] + var minWidth = 1 + (padding[left] || 0) + (padding[right] || 0) + if (col.border) minWidth += 4 + return minWidth +} + +function getWindowWidth () { + if (typeof process === 'object' && process.stdout && process.stdout.columns) return process.stdout.columns +} + +function alignRight (str, width) { + str = str.trim() + var padding = '' + var strWidth = stringWidth(str) + + if (strWidth < width) { + padding = new Array(width - strWidth + 1).join(' ') + } + + return padding + str +} + +function alignCenter (str, width) { + str = str.trim() + var padding = '' + var strWidth = stringWidth(str.trim()) + + if (strWidth < width) { + padding = new Array(parseInt((width - strWidth) / 2, 10) + 1).join(' ') + } + + return padding + str +} + +module.exports = function (opts) { + opts = opts || {} + + return new UI({ + width: (opts || {}).width || getWindowWidth() || 80, + wrap: typeof opts.wrap === 'boolean' ? opts.wrap : true + }) +} |