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const utils = require('./utils'); class Cell { /** * A representation of a cell within the table. * Implementations must have `init` and `draw` methods, * as well as `colSpan`, `rowSpan`, `desiredHeight` and `desiredWidth` properties. * @param options * @constructor */ constructor(options) { this.setOptions(options); /** * Each cell will have it's `x` and `y` values set by the `layout-manager` prior to * `init` being called; * @type {Number} */ this.x = null; this.y = null; } setOptions(options) { if (['boolean', 'number', 'string'].indexOf(typeof options) !== -1) { options = { content: '' + options }; } options = options || {}; this.options = options; let content = options.content; if (['boolean', 'number', 'string'].indexOf(typeof content) !== -1) { this.content = String(content); } else if (!content) { this.content = ''; } else { throw new Error('Content needs to be a primitive, got: ' + typeof content); } this.colSpan = options.colSpan || 1; this.rowSpan = options.rowSpan || 1; } mergeTableOptions(tableOptions, cells) { this.cells = cells; let optionsChars = this.options.chars || {}; let tableChars = tableOptions.chars; let chars = (this.chars = {}); CHAR_NAMES.forEach(function(name) { setOption(optionsChars, tableChars, name, chars); }); this.truncate = this.options.truncate || tableOptions.truncate; let style = (this.options.style = this.options.style || {}); let tableStyle = tableOptions.style; setOption(style, tableStyle, 'padding-left', this); setOption(style, tableStyle, 'padding-right', this); this.head = style.head || tableStyle.head; this.border = style.border || tableStyle.border; let fixedWidth = tableOptions.colWidths[this.x]; if (tableOptions.wordWrap && fixedWidth) { fixedWidth -= this.paddingLeft + this.paddingRight; if (this.colSpan) { let i = 1; while (i < this.colSpan) { fixedWidth += tableOptions.colWidths[this.x + i]; i++; } } this.lines = utils.colorizeLines(utils.wordWrap(fixedWidth, this.content)); } else { this.lines = utils.colorizeLines(this.content.split('\n')); } this.desiredWidth = utils.strlen(this.content) + this.paddingLeft + this.paddingRight; this.desiredHeight = this.lines.length; } /** * Initializes the Cells data structure. * * @param tableOptions - A fully populated set of tableOptions. * In addition to the standard default values, tableOptions must have fully populated the * `colWidths` and `rowWidths` arrays. Those arrays must have lengths equal to the number * of columns or rows (respectively) in this table, and each array item must be a Number. * */ init(tableOptions) { let x = this.x; let y = this.y; this.widths = tableOptions.colWidths.slice(x, x + this.colSpan); this.heights = tableOptions.rowHeights.slice(y, y + this.rowSpan); this.width = this.widths.reduce(sumPlusOne, -1); this.height = this.heights.reduce(sumPlusOne, -1); this.hAlign = this.options.hAlign || tableOptions.colAligns[x]; this.vAlign = this.options.vAlign || tableOptions.rowAligns[y]; this.drawRight = x + this.colSpan == tableOptions.colWidths.length; } /** * Draws the given line of the cell. * This default implementation defers to methods `drawTop`, `drawBottom`, `drawLine` and `drawEmpty`. * @param lineNum - can be `top`, `bottom` or a numerical line number. * @param spanningCell - will be a number if being called from a RowSpanCell, and will represent how * many rows below it's being called from. Otherwise it's undefined. * @returns {String} The representation of this line. */ draw(lineNum, spanningCell) { if (lineNum == 'top') return this.drawTop(this.drawRight); if (lineNum == 'bottom') return this.drawBottom(this.drawRight); let padLen = Math.max(this.height - this.lines.length, 0); let padTop; switch (this.vAlign) { case 'center': padTop = Math.ceil(padLen / 2); break; case 'bottom': padTop = padLen; break; default: padTop = 0; } if (lineNum < padTop || lineNum >= padTop + this.lines.length) { return this.drawEmpty(this.drawRight, spanningCell); } let forceTruncation = this.lines.length > this.height && lineNum + 1 >= this.height; return this.drawLine(lineNum - padTop, this.drawRight, forceTruncation, spanningCell); } /** * Renders the top line of the cell. * @param drawRight - true if this method should render the right edge of the cell. * @returns {String} */ drawTop(drawRight) { let content = []; if (this.cells) { //TODO: cells should always exist - some tests don't fill it in though this.widths.forEach(function(width, index) { content.push(this._topLeftChar(index)); content.push(utils.repeat(this.chars[this.y == 0 ? 'top' : 'mid'], width)); }, this); } else { content.push(this._topLeftChar(0)); content.push(utils.repeat(this.chars[this.y == 0 ? 'top' : 'mid'], this.width)); } if (drawRight) { content.push(this.chars[this.y == 0 ? 'topRight' : 'rightMid']); } return this.wrapWithStyleColors('border', content.join('')); } _topLeftChar(offset) { let x = this.x + offset; let leftChar; if (this.y == 0) { leftChar = x == 0 ? 'topLeft' : offset == 0 ? 'topMid' : 'top'; } else { if (x == 0) { leftChar = 'leftMid'; } else { leftChar = offset == 0 ? 'midMid' : 'bottomMid'; if (this.cells) { //TODO: cells should always exist - some tests don't fill it in though let spanAbove = this.cells[this.y - 1][x] instanceof Cell.ColSpanCell; if (spanAbove) { leftChar = offset == 0 ? 'topMid' : 'mid'; } if (offset == 0) { let i = 1; while (this.cells[this.y][x - i] instanceof Cell.ColSpanCell) { i++; } if (this.cells[this.y][x - i] instanceof Cell.RowSpanCell) { leftChar = 'leftMid'; } } } } } return this.chars[leftChar]; } wrapWithStyleColors(styleProperty, content) { if (this[styleProperty] && this[styleProperty].length) { try { let colors = require('colors/safe'); for (let i = this[styleProperty].length - 1; i >= 0; i--) { colors = colors[this[styleProperty][i]]; } return colors(content); } catch (e) { return content; } } else { return content; } } /** * Renders a line of text. * @param lineNum - Which line of text to render. This is not necessarily the line within the cell. * There may be top-padding above the first line of text. * @param drawRight - true if this method should render the right edge of the cell. * @param forceTruncationSymbol - `true` if the rendered text should end with the truncation symbol even * if the text fits. This is used when the cell is vertically truncated. If `false` the text should * only include the truncation symbol if the text will not fit horizontally within the cell width. * @param spanningCell - a number of if being called from a RowSpanCell. (how many rows below). otherwise undefined. * @returns {String} */ drawLine(lineNum, drawRight, forceTruncationSymbol, spanningCell) { let left = this.chars[this.x == 0 ? 'left' : 'middle']; if (this.x && spanningCell && this.cells) { let cellLeft = this.cells[this.y + spanningCell][this.x - 1]; while (cellLeft instanceof ColSpanCell) { cellLeft = this.cells[cellLeft.y][cellLeft.x - 1]; } if (!(cellLeft instanceof RowSpanCell)) { left = this.chars['rightMid']; } } let leftPadding = utils.repeat(' ', this.paddingLeft); let right = drawRight ? this.chars['right'] : ''; let rightPadding = utils.repeat(' ', this.paddingRight); let line = this.lines[lineNum]; let len = this.width - (this.paddingLeft + this.paddingRight); if (forceTruncationSymbol) line += this.truncate || '…'; let content = utils.truncate(line, len, this.truncate); content = utils.pad(content, len, ' ', this.hAlign); content = leftPadding + content + rightPadding; return this.stylizeLine(left, content, right); } stylizeLine(left, content, right) { left = this.wrapWithStyleColors('border', left); right = this.wrapWithStyleColors('border', right); if (this.y === 0) { content = this.wrapWithStyleColors('head', content); } return left + content + right; } /** * Renders the bottom line of the cell. * @param drawRight - true if this method should render the right edge of the cell. * @returns {String} */ drawBottom(drawRight) { let left = this.chars[this.x == 0 ? 'bottomLeft' : 'bottomMid']; let content = utils.repeat(this.chars.bottom, this.width); let right = drawRight ? this.chars['bottomRight'] : ''; return this.wrapWithStyleColors('border', left + content + right); } /** * Renders a blank line of text within the cell. Used for top and/or bottom padding. * @param drawRight - true if this method should render the right edge of the cell. * @param spanningCell - a number of if being called from a RowSpanCell. (how many rows below). otherwise undefined. * @returns {String} */ drawEmpty(drawRight, spanningCell) { let left = this.chars[this.x == 0 ? 'left' : 'middle']; if (this.x && spanningCell && this.cells) { let cellLeft = this.cells[this.y + spanningCell][this.x - 1]; while (cellLeft instanceof ColSpanCell) { cellLeft = this.cells[cellLeft.y][cellLeft.x - 1]; } if (!(cellLeft instanceof RowSpanCell)) { left = this.chars['rightMid']; } } let right = drawRight ? this.chars['right'] : ''; let content = utils.repeat(' ', this.width); return this.stylizeLine(left, content, right); } } class ColSpanCell { /** * A Cell that doesn't do anything. It just draws empty lines. * Used as a placeholder in column spanning. * @constructor */ constructor() {} draw() { return ''; } init() {} mergeTableOptions() {} } class RowSpanCell { /** * A placeholder Cell for a Cell that spans multiple rows. * It delegates rendering to the original cell, but adds the appropriate offset. * @param originalCell * @constructor */ constructor(originalCell) { this.originalCell = originalCell; } init(tableOptions) { let y = this.y; let originalY = this.originalCell.y; this.cellOffset = y - originalY; this.offset = findDimension(tableOptions.rowHeights, originalY, this.cellOffset); } draw(lineNum) { if (lineNum == 'top') { return this.originalCell.draw(this.offset, this.cellOffset); } if (lineNum == 'bottom') { return this.originalCell.draw('bottom'); } return this.originalCell.draw(this.offset + 1 + lineNum); } mergeTableOptions() {} } // HELPER FUNCTIONS function setOption(objA, objB, nameB, targetObj) { let nameA = nameB.split('-'); if (nameA.length > 1) { nameA[1] = nameA[1].charAt(0).toUpperCase() + nameA[1].substr(1); nameA = nameA.join(''); targetObj[nameA] = objA[nameA] || objA[nameB] || objB[nameA] || objB[nameB]; } else { targetObj[nameB] = objA[nameB] || objB[nameB]; } } function findDimension(dimensionTable, startingIndex, span) { let ret = dimensionTable[startingIndex]; for (let i = 1; i < span; i++) { ret += 1 + dimensionTable[startingIndex + i]; } return ret; } function sumPlusOne(a, b) { return a + b + 1; } let CHAR_NAMES = [ 'top', 'top-mid', 'top-left', 'top-right', 'bottom', 'bottom-mid', 'bottom-left', 'bottom-right', 'left', 'left-mid', 'mid', 'mid-mid', 'right', 'right-mid', 'middle', ]; module.exports = Cell; module.exports.ColSpanCell = ColSpanCell; module.exports.RowSpanCell = RowSpanCell;
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