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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;