671 lines
16 KiB
Markdown
671 lines
16 KiB
Markdown
<a name="table"></a>
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# Table
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[](https://travis-ci.org/gajus/table)
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[](https://www.npmjs.com/package/table)
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[](https://github.com/gajus/canonical)
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* [Table](#table)
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* [Features](#table-features)
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* [Usage](#table-usage)
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* [Cell Content Alignment](#table-usage-cell-content-alignment)
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* [Column Width](#table-usage-column-width)
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* [Custom Border](#table-usage-custom-border)
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* [Draw Horizontal Line](#table-usage-draw-horizontal-line)
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* [Padding Cell Content](#table-usage-padding-cell-content)
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* [Predefined Border Templates](#table-usage-predefined-border-templates)
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* [Streaming](#table-usage-streaming)
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* [Text Truncation](#table-usage-text-truncation)
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* [Text Wrapping](#table-usage-text-wrapping)
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Produces a string that represents array data in a text table.
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<a name="table-features"></a>
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## Features
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* Works with strings containing [fullwidth](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms) characters.
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* Works with strings containing [ANSI escape codes](https://en.wikipedia.org/wiki/ANSI_escape_code).
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* Configurable border characters.
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* Configurable content alignment per column.
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* Configurable content padding per column.
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* Configurable column width.
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* Text wrapping.
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<a name="table-usage"></a>
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## Usage
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Table data is described using an array (rows) of array (cells).
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```js
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import {
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table
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} from 'table';
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// Using commonjs?
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// const {table} = require('table');
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let data,
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output;
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data = [
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['0A', '0B', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C']
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];
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/**
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* @typedef {string} table~cell
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*/
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/**
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* @typedef {table~cell[]} table~row
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*/
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/**
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* @typedef {Object} table~columns
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* @property {string} alignment Cell content alignment (enum: left, center, right) (default: left).
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* @property {number} width Column width (default: auto).
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* @property {number} truncate Number of characters are which the content will be truncated (default: Infinity).
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* @property {number} paddingLeft Cell content padding width left (default: 1).
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* @property {number} paddingRight Cell content padding width right (default: 1).
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*/
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/**
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* @typedef {Object} table~border
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* @property {string} topBody
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* @property {string} topJoin
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* @property {string} topLeft
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* @property {string} topRight
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* @property {string} bottomBody
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* @property {string} bottomJoin
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* @property {string} bottomLeft
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* @property {string} bottomRight
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* @property {string} bodyLeft
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* @property {string} bodyRight
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* @property {string} bodyJoin
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* @property {string} joinBody
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* @property {string} joinLeft
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* @property {string} joinRight
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* @property {string} joinJoin
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*/
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/**
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* Used to dynamically tell table whether to draw a line separating rows or not.
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* The default behavior is to always return true.
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*
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* @typedef {function} drawJoin
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* @param {number} index
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* @param {number} size
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* @return {boolean}
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*/
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/**
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* @typedef {Object} table~config
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* @property {table~border} border
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* @property {table~columns[]} columns Column specific configuration.
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* @property {table~columns} columnDefault Default values for all columns. Column specific settings overwrite the default values.
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* @property {table~drawJoin} drawHorizontalLine
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*/
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/**
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* Generates a text table.
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*
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* @param {table~row[]} rows
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* @param {table~config} config
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* @return {String}
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*/
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output = table(data);
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console.log(output);
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```
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```
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╔════╤════╤════╗
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║ 0A │ 0B │ 0C ║
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╟────┼────┼────╢
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║ 1A │ 1B │ 1C ║
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╟────┼────┼────╢
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║ 2A │ 2B │ 2C ║
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╚════╧════╧════╝
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```
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<a name="table-usage-cell-content-alignment"></a>
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### Cell Content Alignment
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`{string} config.columns[{number}].alignment` property controls content horizontal alignment within a cell.
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Valid values are: "left", "right" and "center".
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```js
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let config,
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data,
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output;
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data = [
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['0A', '0B', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C']
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];
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config = {
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columns: {
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0: {
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alignment: 'left',
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minWidth: 10
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},
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1: {
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alignment: 'center',
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minWidth: 10
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},
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2: {
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alignment: 'right',
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minWidth: 10
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}
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}
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};
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output = table(data, config);
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console.log(output);
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```
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```
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╔════════════╤════════════╤════════════╗
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║ 0A │ 0B │ 0C ║
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╟────────────┼────────────┼────────────╢
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║ 1A │ 1B │ 1C ║
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╟────────────┼────────────┼────────────╢
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║ 2A │ 2B │ 2C ║
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╚════════════╧════════════╧════════════╝
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```
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<a name="table-usage-column-width"></a>
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### Column Width
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`{number} config.columns[{number}].width` property restricts column width to a fixed width.
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```js
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let data,
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output,
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options;
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data = [
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['0A', '0B', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C']
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];
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options = {
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columns: {
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1: {
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width: 10
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}
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}
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};
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output = table(data, options);
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console.log(output);
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```
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```
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╔════╤════════════╤════╗
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║ 0A │ 0B │ 0C ║
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╟────┼────────────┼────╢
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║ 1A │ 1B │ 1C ║
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╟────┼────────────┼────╢
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║ 2A │ 2B │ 2C ║
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╚════╧════════════╧════╝
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```
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<a name="table-usage-custom-border"></a>
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### Custom Border
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`{object} config.border` property describes characters used to draw the table border.
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```js
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let config,
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data,
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output;
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data = [
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['0A', '0B', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C']
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];
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config = {
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border: {
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topBody: `─`,
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topJoin: `┬`,
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topLeft: `┌`,
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topRight: `┐`,
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bottomBody: `─`,
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bottomJoin: `┴`,
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bottomLeft: `└`,
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bottomRight: `┘`,
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bodyLeft: `│`,
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bodyRight: `│`,
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bodyJoin: `│`,
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joinBody: `─`,
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joinLeft: `├`,
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joinRight: `┤`,
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joinJoin: `┼`
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}
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};
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output = table(data, config);
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console.log(output);
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```
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```
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┌────┬────┬────┐
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│ 0A │ 0B │ 0C │
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├────┼────┼────┤
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│ 1A │ 1B │ 1C │
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├────┼────┼────┤
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│ 2A │ 2B │ 2C │
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└────┴────┴────┘
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```
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<a name="table-usage-draw-horizontal-line"></a>
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### Draw Horizontal Line
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`{function} config.drawHorizontalLine` property is a function that is called for every non-content row in the table. The result of the function `{boolean}` determines whether a row is drawn.
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```js
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let data,
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output,
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options;
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data = [
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['0A', '0B', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C'],
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['3A', '3B', '3C'],
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['4A', '4B', '4C']
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];
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options = {
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/**
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* @typedef {function} drawJoin
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* @param {number} index
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* @param {number} size
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* @return {boolean}
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*/
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drawHorizontalLine: (index, size) => {
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return index === 0 || index === 1 || index === size - 1 || index === size;
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}
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};
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output = table(data, options);
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console.log(output);
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```
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```
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╔════╤════╤════╗
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║ 0A │ 0B │ 0C ║
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╟────┼────┼────╢
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║ 1A │ 1B │ 1C ║
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║ 2A │ 2B │ 2C ║
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║ 3A │ 3B │ 3C ║
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╟────┼────┼────╢
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║ 4A │ 4B │ 4C ║
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╚════╧════╧════╝
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```
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<a name="table-usage-padding-cell-content"></a>
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### Padding Cell Content
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`{number} config.columns[{number}].paddingLeft` and `{number} config.columns[{number}].paddingRight` properties control content padding within a cell. Property value represents a number of whitespaces used to pad the content.
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```js
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let config,
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data,
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output;
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data = [
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['0A', 'AABBCC', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C']
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];
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config = {
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columns: {
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0: {
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paddingLeft: 3
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},
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1: {
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width: 2,
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paddingRight: 3
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}
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}
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};
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output = table(data, config);
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console.log(output);
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```
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```
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╔══════╤══════╤════╗
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║ 0A │ AA │ 0C ║
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║ │ BB │ ║
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║ │ CC │ ║
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╟──────┼──────┼────╢
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║ 1A │ 1B │ 1C ║
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╟──────┼──────┼────╢
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║ 2A │ 2B │ 2C ║
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╚══════╧══════╧════╝
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```
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<a name="table-usage-predefined-border-templates"></a>
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### Predefined Border Templates
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You can load one of the predefined border templates using `getBorderCharacters` function.
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```js
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import {
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table,
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getBorderCharacters
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} from 'table';
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let config,
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data;
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data = [
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['0A', '0B', '0C'],
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['1A', '1B', '1C'],
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['2A', '2B', '2C']
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];
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config = {
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border: getBorderCharacters(`name of the template`)
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};
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table(data, config);
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```
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```
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# honeywell
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╔════╤════╤════╗
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║ 0A │ 0B │ 0C ║
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╟────┼────┼────╢
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║ 1A │ 1B │ 1C ║
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╟────┼────┼────╢
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║ 2A │ 2B │ 2C ║
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╚════╧════╧════╝
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# norc
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┌────┬────┬────┐
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│ 0A │ 0B │ 0C │
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├────┼────┼────┤
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│ 1A │ 1B │ 1C │
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├────┼────┼────┤
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│ 2A │ 2B │ 2C │
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└────┴────┴────┘
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# ramac (ASCII; for use in terminals that do not support Unicode characters)
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+----+----+----+
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| 0A | 0B | 0C |
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|----|----|----|
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| 1A | 1B | 1C |
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|----|----|----|
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| 2A | 2B | 2C |
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+----+----+----+
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# void (no borders; see "bordless table" section of the documentation)
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0A 0B 0C
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1A 1B 1C
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2A 2B 2C
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```
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Raise [an issue](https://github.com/gajus/table/issues) if you'd like to contribute a new border template.
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<a name="table-usage-predefined-border-templates-borderless-table"></a>
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#### Borderless Table
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Simply using "void" border character template creates a table with a lot of unnecessary spacing.
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To create a more plesant to the eye table, reset the padding and remove the joining rows, e.g.
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```js
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let output;
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output = table(data, {
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border: getBorderCharacters(`void`),
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columnDefault: {
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paddingLeft: 0,
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paddingRight: 1
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},
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drawJoin: () => {
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return false
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}
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});
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console.log(output);
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```
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```
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0A 0B 0C
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1A 1B 1C
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2A 2B 2C
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```
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<a name="table-usage-streaming"></a>
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### Streaming
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`table` package exports `createStream` function used to draw a table and append rows.
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`createStream` requires `{number} columnDefault.width` and `{number} columnCount` configuration properties.
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```js
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import {
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createStream
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} from 'table';
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let config,
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stream;
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config = {
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columnDefault: {
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width: 50
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},
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columnCount: 1
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};
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stream = createStream(config);
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setInterval(() => {
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stream.write([new Date()]);
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}, 500);
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```
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`table` package uses ANSI escape codes to overwrite the output of the last line when a new row is printed.
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The underlying implementation is explained in this [Stack Overflow answer](http://stackoverflow.com/a/32938658/368691).
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Streaming supports all of the configuration properties and functionality of a static table (such as auto text wrapping, alignment and padding), e.g.
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```js
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import {
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createStream
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} from 'table';
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import _ from 'lodash';
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let config,
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stream,
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i;
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config = {
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columnDefault: {
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width: 50
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},
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columnCount: 3,
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columns: {
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0: {
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width: 10,
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alignment: 'right'
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},
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1: {
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alignment: 'center',
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},
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2: {
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width: 10
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}
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}
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};
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stream = createStream(config);
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i = 0;
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setInterval(() => {
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let random;
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random = _.sample('abcdefghijklmnopqrstuvwxyz', _.random(1, 30)).join('');
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stream.write([i++, new Date(), random]);
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}, 500);
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```
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<a name="table-usage-text-truncation"></a>
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### Text Truncation
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To handle a content that overflows the container width, `table` package implements [text wrapping](#table-usage-text-wrapping). However, sometimes you may want to truncate content that is too long to be displayed in the table.
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`{number} config.columns[{number}].truncate` property (default: `Infinity`) truncates the text at the specified length.
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```js
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let config,
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data,
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output;
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data = [
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['Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus pulvinar nibh sed mauris convallis dapibus. Nunc venenatis tempus nulla sit amet viverra.']
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];
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config = {
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columns: {
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0: {
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width: 20,
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truncate: 100
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}
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}
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};
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output = table(data, config);
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console.log(output);
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```
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```
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╔══════════════════════╗
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║ Lorem ipsum dolor si ║
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║ t amet, consectetur ║
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║ adipiscing elit. Pha ║
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║ sellus pulvinar nibh ║
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║ sed mauris conva... ║
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╚══════════════════════╝
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```
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<a name="table-usage-text-wrapping"></a>
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### Text Wrapping
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`table` package implements auto text wrapping, i.e. text that has width greater than the container width will be separated into multiple lines, e.g.
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```js
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let config,
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data,
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output;
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data = [
|
|
['Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus pulvinar nibh sed mauris convallis dapibus. Nunc venenatis tempus nulla sit amet viverra.']
|
|
];
|
|
|
|
config = {
|
|
columns: {
|
|
0: {
|
|
width: 20
|
|
}
|
|
}
|
|
};
|
|
|
|
output = table(data, config);
|
|
|
|
console.log(output);
|
|
```
|
|
|
|
```
|
|
╔══════════════════════╗
|
|
║ Lorem ipsum dolor si ║
|
|
║ t amet, consectetur ║
|
|
║ adipiscing elit. Pha ║
|
|
║ sellus pulvinar nibh ║
|
|
║ sed mauris convallis ║
|
|
║ dapibus. Nunc venena ║
|
|
║ tis tempus nulla sit ║
|
|
║ amet viverra. ║
|
|
╚══════════════════════╝
|
|
```
|
|
|
|
When `wrapWord` is `true` the text is broken at the nearest space or one of the special characters ("-", "_", "\", "/", ".", ",", ";"), e.g.
|
|
|
|
```js
|
|
let config,
|
|
data,
|
|
output;
|
|
|
|
data = [
|
|
['Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus pulvinar nibh sed mauris convallis dapibus. Nunc venenatis tempus nulla sit amet viverra.']
|
|
];
|
|
|
|
config = {
|
|
columns: {
|
|
0: {
|
|
width: 20,
|
|
wrapWord: true
|
|
}
|
|
}
|
|
};
|
|
|
|
output = table(data, config);
|
|
|
|
console.log(output);
|
|
```
|
|
|
|
```
|
|
╔══════════════════════╗
|
|
║ Lorem ipsum dolor ║
|
|
║ sit amet, ║
|
|
║ consectetur ║
|
|
║ adipiscing elit. ║
|
|
║ Phasellus pulvinar ║
|
|
║ nibh sed mauris ║
|
|
║ convallis dapibus. ║
|
|
║ Nunc venenatis ║
|
|
║ tempus nulla sit ║
|
|
║ amet viverra. ║
|
|
╚══════════════════════╝
|
|
```
|
|
|