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File Content: columnify.js

"use strict";

var wcwidth = require('./width');

var _require = require('./utils'),
    padRight = _require.padRight,
    padCenter = _require.padCenter,
    padLeft = _require.padLeft,
    splitIntoLines = _require.splitIntoLines,
    splitLongWords = _require.splitLongWords,
    truncateString = _require.truncateString;

var DEFAULT_HEADING_TRANSFORM = function DEFAULT_HEADING_TRANSFORM(key) {
  return key.toUpperCase();
};

var DEFAULT_DATA_TRANSFORM = function DEFAULT_DATA_TRANSFORM(cell, column, index) {
  return cell;
};

var DEFAULTS = Object.freeze({
  maxWidth: Infinity,
  minWidth: 0,
  columnSplitter: ' ',
  truncate: false,
  truncateMarker: '…',
  preserveNewLines: false,
  paddingChr: ' ',
  showHeaders: true,
  headingTransform: DEFAULT_HEADING_TRANSFORM,
  dataTransform: DEFAULT_DATA_TRANSFORM
});

module.exports = function (items) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

var columnConfigs = options.config || {};
  delete options.config; // remove config so doesn't appear on every column.

var maxLineWidth = options.maxLineWidth || Infinity;
  if (maxLineWidth === 'auto') maxLineWidth = process.stdout.columns || Infinity;
  delete options.maxLineWidth; // this is a line control option, don't pass it to column

// Option defaults inheritance:
  // options.config[columnName] => options => DEFAULTS
  options = mixin({}, DEFAULTS, options);

options.config = options.config || Object.create(null);

options.spacing = options.spacing || '\n'; // probably useless
  options.preserveNewLines = !!options.preserveNewLines;
  options.showHeaders = !!options.showHeaders;
  options.columns = options.columns || options.include; // alias include/columns, prefer columns if supplied
  var columnNames = options.columns || []; // optional user-supplied columns to include

items = toArray(items, columnNames);

// if not suppled column names, automatically determine columns from data keys
  if (!columnNames.length) {
    items.forEach(function (item) {
      for (var columnName in item) {
        if (columnNames.indexOf(columnName) === -1) columnNames.push(columnName);
      }
    });
  }

// initialize column defaults (each column inherits from options.config)
  var columns = columnNames.reduce(function (columns, columnName) {
    var column = Object.create(options);
    columns[columnName] = mixin(column, columnConfigs[columnName]);
    return columns;
  }, Object.create(null));

// sanitize column settings
  columnNames.forEach(function (columnName) {
    var column = columns[columnName];
    column.name = columnName;
    column.maxWidth = Math.ceil(column.maxWidth);
    column.minWidth = Math.ceil(column.minWidth);
    column.truncate = !!column.truncate;
    column.align = column.align || 'left';
  });

// sanitize data
  items = items.map(function (item) {
    var result = Object.create(null);
    columnNames.forEach(function (columnName) {
      // null/undefined -> ''
      result[columnName] = item[columnName] != null ? item[columnName] : '';
      // toString everything
      result[columnName] = '' + result[columnName];
      if (columns[columnName].preserveNewLines) {
        // merge non-newline whitespace chars
        result[columnName] = result[columnName].replace(/[^\S\n]/gmi, ' ');
      } else {
        // merge all whitespace chars
        result[columnName] = result[columnName].replace(/\s/gmi, ' ');
      }
    });
    return result;
  });

// transform data cells
  columnNames.forEach(function (columnName) {
    var column = columns[columnName];
    items = items.map(function (item, index) {
      var col = Object.create(column);
      item[columnName] = column.dataTransform(item[columnName], col, index);

// add headers
  var headers = {};
  if (options.showHeaders) {
    columnNames.forEach(function (columnName) {
      var column = columns[columnName];

if (!column.showHeaders) {
        headers[columnName] = '';
        return;
      }

headers[columnName] = column.headingTransform(column.name);
    });
    items.unshift(headers);
  }
  // get actual max-width between min & max
  // based on length of data in columns
  columnNames.forEach(function (columnName) {
    var column = columns[columnName];
    column.width = items.map(function (item) {
      return item[columnName];
    }).reduce(function (min, cur) {
      // if already at maxWidth don't bother testing
      if (min >= column.maxWidth) return min;
      return Math.max(min, Math.min(column.maxWidth, Math.max(column.minWidth, wcwidth(cur))));
    }, 0);
  });

// split long words so they can break onto multiple lines
  columnNames.forEach(function (columnName) {
    var column = columns[columnName];
    items = items.map(function (item) {
      item[columnName] = splitLongWords(item[columnName], column.width, column.truncateMarker);
      return item;
    });
  });

// wrap long lines. each item is now an array of lines.
  columnNames.forEach(function (columnName) {
    var column = columns[columnName];
    items = items.map(function (item, index) {
      var cell = item[columnName];
      item[columnName] = splitIntoLines(cell, column.width);

// if truncating required, only include first line + add truncation char
      if (column.truncate && item[columnName].length > 1) {
        item[columnName] = splitIntoLines(cell, column.width - wcwidth(column.truncateMarker));
        var firstLine = item[columnName][0];
        if (!endsWith(firstLine, column.truncateMarker)) item[columnName][0] += column.truncateMarker;
        item[columnName] = item[columnName].slice(0, 1);
      }
      return item;
    });
  });

// recalculate column widths from truncated output/lines
  columnNames.forEach(function (columnName) {
    var column = columns[columnName];
    column.width = items.map(function (item) {
      return item[columnName].reduce(function (min, cur) {
        if (min >= column.maxWidth) return min;
        return Math.max(min, Math.min(column.maxWidth, Math.max(column.minWidth, wcwidth(cur))));
      }, 0);
    }).reduce(function (min, cur) {
      if (min >= column.maxWidth) return min;
      return Math.max(min, Math.min(column.maxWidth, Math.max(column.minWidth, cur)));
    }, 0);
  });

/**
 * Convert wrapped lines into rows with padded values.
 *
 * @param Array items data to process
 * @param Array columns column width settings for wrapping
 * @param Array columnNames column ordering
 * @return Array items wrapped in arrays, corresponding to lines
 */

function createRows(items, columns, columnNames, paddingChr) {
  return items.map(function (item) {
    var row = [];
    var numLines = 0;
    columnNames.forEach(function (columnName) {
      numLines = Math.max(numLines, item[columnName].length);
    });
    // combine matching lines of each rows

var _loop = function _loop(i) {
      row[i] = row[i] || [];
      columnNames.forEach(function (columnName) {
        var column = columns[columnName];
        var val = item[columnName][i] || ''; // || '' ensures empty columns get padded
        if (column.align === 'right') row[i].push(padLeft(val, column.width, paddingChr));else if (column.align === 'center' || column.align === 'centre') row[i].push(padCenter(val, column.width, paddingChr));else row[i].push(padRight(val, column.width, paddingChr));
      });
    };

for (var i = 0; i < numLines; i++) {
      _loop(i);
    }
    return row;
  });
}

/**
 * Object.assign
 *
 * @return Object Object with properties mixed in.
 */

function mixin() {
  if (Object.assign) return Object.assign.apply(Object, arguments);
  return ObjectAssign.apply(undefined, arguments);
}

function ObjectAssign(target, firstSource) {
  "use strict";

if (target === undefined || target === null) throw new TypeError("Cannot convert first argument to object");

var to = Object(target);

var hasPendingException = false;
  var pendingException;

for (var i = 1; i < arguments.length; i++) {
    var nextSource = arguments[i];
    if (nextSource === undefined || nextSource === null) continue;

if (hasPendingException) throw pendingException;
  }
  return to;
}

/**
 * Adapted from String.prototype.endsWith polyfill.
 */

function endsWith(target, searchString, position) {
  position = position || target.length;
  position = position - searchString.length;
  var lastIndex = target.lastIndexOf(searchString);
  return lastIndex !== -1 && lastIndex === position;
}

Name	Size	Permission
LICENSE	1076 bytes	0644
Makefile	128 bytes	0644
columnify.js	10150 bytes	0644
index.js	9408 bytes	0644
package.json	1102 bytes	0644
utils.js	4868 bytes	0644
width.js	140 bytes	0644