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Edit File : columnify.js \| Size : 9.94 KB
"use strict"; var wcwidth = require('./width'); var _require = require('./utils'); var padRight = _require.padRight; var padCenter = _require.padCenter; var padLeft = _require.padLeft; var splitIntoLines = _require.splitIntoLines; var splitLongWords = _require.splitLongWords; var 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); var changedKeys = Object.keys(col); // disable default heading transform if we wrote to column.name if (changedKeys.indexOf('name') !== -1) { if (column.headingTransform !== DEFAULT_HEADING_TRANSFORM) return; column.headingTransform = function (heading) { return heading; }; } changedKeys.forEach(function (key) { return column[key] = col[key]; }); return item; }); }); // 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); }); var rows = createRows(items, columns, columnNames, options.paddingChr); // merge lines into rows // conceive output return rows.reduce(function (output, row) { return output.concat(row.reduce(function (rowOut, line) { return rowOut.concat(line.join(options.columnSplitter)); }, [])); }, []).map(function (line) { return truncateString(line, maxLineWidth); }).join(options.spacing); }; /** * 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() { var _Object; if (Object.assign) return (_Object = 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; var keysArray = Object.keys(Object(nextSource)); for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) { var nextKey = keysArray[nextIndex]; try { var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey); if (desc !== undefined && desc.enumerable) to[nextKey] = nextSource[nextKey]; } catch (e) { if (!hasPendingException) { hasPendingException = true; pendingException = e; } } } 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; } function toArray(items, columnNames) { if (Array.isArray(items)) return items; var rows = []; for (var key in items) { var item = {}; item[columnNames[0] \|\| 'key'] = key; item[columnNames[1] \|\| 'value'] = items[key]; rows.push(item); } return rows; } Back

Edit File : columnify.js | Size : 9.94 KB

"use strict";

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

var _require = require('./utils');

var padRight = _require.padRight;
var padCenter = _require.padCenter;
var padLeft = _require.padLeft;
var splitIntoLines = _require.splitIntoLines;
var splitLongWords = _require.splitLongWords;
var 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() {
  var _Object;

if (Object.assign) return (_Object = 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;
}

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