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- var wrap = require('wordwrap'),
- align = {
- right: require('right-align'),
- center: require('center-align')
- },
- top = 0,
- right = 1,
- bottom = 2,
- 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.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,
- rows = str.split('\n'),
- leftColumnWidth = 0
-
-
-
-
- rows.forEach(function (row) {
- var columns = row.split('\t')
- if (columns.length > 1 && columns[0].length > leftColumnWidth) {
- leftColumnWidth = Math.min(
- Math.floor(_this.width * 0.5),
- columns[0].length
- )
- }
- })
-
-
-
- rows.forEach(function (row) {
- var columns = row.split('\t')
- _this.div.apply(_this, columns.map(function (r, i) {
- return {
- text: r.trim(),
- padding: [0, r.match(/\s*$/)[0].length, 0, r.match(/^\s*/)[0].length],
- width: (i === 0 && columns.length > 1) ? leftColumnWidth : undefined
- }
- }))
- })
- return this.rows[this.rows.length - 1]
- }
- UI.prototype._colFromString = function (str) {
- return {
- text: str
- }
- }
- UI.prototype.toString = function () {
- var _this = this,
- lines = []
- _this.rows.forEach(function (row, i) {
- _this.rowToString(row, lines)
- })
-
-
- lines = lines.filter(function (line) {
- return !line.hidden
- })
- return lines.map(function (line) {
- return line.text
- }).join('\n')
- }
- UI.prototype.rowToString = function (row, lines) {
- var _this = this,
- paddingLeft,
- rrows = this._rasterize(row),
- str = '',
- ts,
- width,
- wrapWidth
- rrows.forEach(function (rrow, r) {
- str = ''
- rrow.forEach(function (col, c) {
- ts = ''
- width = row[c].width
- wrapWidth = _this._negatePadding(row[c])
- for (var i = 0; i < Math.max(wrapWidth, col.length); i++) {
- ts += col.charAt(i) || ' '
- }
-
- if (row[c].align && row[c].align !== 'left' && _this.wrap) {
- ts = align[row[c].align](ts.trim() + '\n' + new Array(wrapWidth + 1).join(' '))
- .split('\n')[0]
- if (ts.length < wrapWidth) ts += new Array(width - ts.length).join(' ')
- }
-
- paddingLeft = (row[c].padding || [0, 0, 0, 0])[left]
- if (paddingLeft) str += new Array(row[c].padding[left] + 1).join(' ')
- str += ts
- if (row[c].padding && row[c].padding[right]) str += new Array(row[c].padding[right] + 1).join(' ')
-
-
- if (r === 0 && lines.length > 0) {
- str = _this._renderInline(str, lines[lines.length - 1], paddingLeft)
- }
- })
-
- lines.push({
- text: str.replace(/ +$/, ''),
- span: row.span
- })
- })
- return lines
- }
- UI.prototype._renderInline = function (source, previousLine, paddingLeft) {
- var target = previousLine.text,
- str = ''
- if (!previousLine.span) return source
-
-
- if (!this.wrap) {
- previousLine.hidden = true
- return target + source
- }
- for (var i = 0, tc, sc; i < Math.max(source.length, target.length); i++) {
- tc = target.charAt(i) || ' '
- sc = source.charAt(i) || ' '
-
- if (tc !== ' ' && sc !== ' ') return source
-
- if (sc !== ' ' && i < paddingLeft + target.length) return source
-
- if (tc === ' ') str += sc
- else str += tc
- }
- previousLine.hidden = true
- return str
- }
- UI.prototype._rasterize = function (row) {
- var _this = this,
- i,
- rrow,
- rrows = [],
- widths = this._columnWidths(row),
- wrapped
-
-
- row.forEach(function (col, c) {
-
- col.width = widths[c]
- if (_this.wrap) wrapped = wrap.hard(_this._negatePadding(col))(col.text).split('\n')
- else wrapped = col.text.split('\n')
-
- 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)
- return wrapWidth
- }
- UI.prototype._columnWidths = function (row) {
- var _this = this,
- widths = [],
- unset = row.length,
- unsetWidth,
- remainingWidth = this.width
-
- row.forEach(function (col, i) {
- if (col.width) {
- unset--
- widths[i] = col.width
- remainingWidth -= col.width
- } else {
- widths[i] = undefined
- }
- })
-
- if (unset) unsetWidth = Math.floor(remainingWidth / unset)
- widths.forEach(function (w, i) {
- if (!_this.wrap) widths[i] = row[i].width || row[i].text.length
- else if (w === undefined) widths[i] = Math.max(unsetWidth, _minWidth(row[i]))
- })
- return widths
- }
- function _minWidth (col) {
- var padding = col.padding || []
- return 1 + (padding[left] || 0) + (padding[right] || 0)
- }
- module.exports = function (opts) {
- opts = opts || {}
- return new UI({
- width: (opts || {}).width || 80,
- wrap: typeof opts.wrap === 'boolean' ? opts.wrap : true
- })
- }
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