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name : listtable.js
 /**
 * listtable.js - list table element for blessed
 * Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
 * https://github.com/chjj/blessed
 */

/**
 * Modules
 */

var Node = require('./node');
var Box = require('./box');
var List = require('./list');
var Table = require('./table');

/**
 * ListTable
 */

function ListTable(options) {
  var self = this;

  if (!(this instanceof Node)) {
    return new ListTable(options);
  }

  options = options || {};
  options.shrink = true;
  options.normalShrink = true;
  options.style = options.style || {};
  options.style.border = options.style.border || {};
  options.style.header = options.style.header || {};
  options.style.cell = options.style.cell || {};
  this.__align = options.align || 'center';
  delete options.align;

  options.style.selected = options.style.cell.selected;
  options.style.item = options.style.cell;

  List.call(this, options);

  this._header = new Box({
    parent: this,
    left: this.screen.autoPadding ? 0 : this.ileft,
    top: 0,
    width: 'shrink',
    height: 1,
    style: options.style.header,
    tags: options.parseTags || options.tags
  });

  this.on('scroll', function() {
    self._header.setFront();
    self._header.rtop = self.childBase;
    if (!self.screen.autoPadding) {
      self._header.rtop = self.childBase + (self.border ? 1 : 0);
    }
  });

  this.pad = options.pad != null
    ? options.pad
    : 2;

  this.setData(options.rows || options.data);

  this.on('attach', function() {
    self.setData(self.rows);
  });

  this.on('resize', function() {
    var selected = self.selected;
    self.setData(self.rows);
    self.select(selected);
    self.screen.render();
  });
}

ListTable.prototype.__proto__ = List.prototype;

ListTable.prototype.type = 'list-table';

ListTable.prototype._calculateMaxes = Table.prototype._calculateMaxes;

ListTable.prototype.setRows =
ListTable.prototype.setData = function(rows) {
  var self = this
    , align = this.__align;

  if (this.visible && this.lpos) {
    this.clearPos();
  }

  this.clearItems();

  this.rows = rows || [];

  this._calculateMaxes();

  if (!this._maxes) return;

  this.addItem('');

  this.rows.forEach(function(row, i) {
    var isHeader = i === 0;
    var text = '';
    row.forEach(function(cell, i) {
      var width = self._maxes[i];
      var clen = self.strWidth(cell);

      if (i !== 0) {
        text += ' ';
      }

      while (clen < width) {
        if (align === 'center') {
          cell = ' ' + cell + ' ';
          clen += 2;
        } else if (align === 'left') {
          cell = cell + ' ';
          clen += 1;
        } else if (align === 'right') {
          cell = ' ' + cell;
          clen += 1;
        }
      }

      if (clen > width) {
        if (align === 'center') {
          cell = cell.substring(1);
          clen--;
        } else if (align === 'left') {
          cell = cell.slice(0, -1);
          clen--;
        } else if (align === 'right') {
          cell = cell.substring(1);
          clen--;
        }
      }

      text += cell;
    });
    if (isHeader) {
      self._header.setContent(text);
    } else {
      self.addItem(text);
    }
  });

  this._header.setFront();

  this.select(0);
};

ListTable.prototype._select = ListTable.prototype.select;
ListTable.prototype.select = function(i) {
  if (i === 0) {
    i = 1;
  }
  if (i <= this.childBase) {
    this.setScroll(this.childBase - 1);
  }
  return this._select(i);
};

ListTable.prototype.render = function() {
  var self = this;

  var coords = this._render();
  if (!coords) return;

  this._calculateMaxes();

  if (!this._maxes) return coords;

  var lines = this.screen.lines
    , xi = coords.xi
    , yi = coords.yi
    , rx
    , ry
    , i;

  var battr = this.sattr(this.style.border);

  var height = coords.yl - coords.yi - this.ibottom;

  if (!this.border || this.options.noCellBorders) return coords;

  // Draw border with correct angles.
  ry = 0;
  for (i = 0; i < height + 1; i++) {
    if (!lines[yi + ry]) break;
    rx = 0;
    self._maxes.slice(0, -1).forEach(function(max) {
      rx += max;
      if (!lines[yi + ry][xi + rx + 1]) return;
      // center
      if (ry === 0) {
        // top
        rx++;
        lines[yi + ry][xi + rx][0] = battr;
        lines[yi + ry][xi + rx][1] = '\u252c'; // '┬'
        // XXX If we alter iheight and itop for no borders - nothing should be written here
        if (!self.border.top) {
          lines[yi + ry][xi + rx][1] = '\u2502'; // '│'
        }
        lines[yi + ry].dirty = true;
      } else if (ry === height) {
        // bottom
        rx++;
        lines[yi + ry][xi + rx][0] = battr;
        lines[yi + ry][xi + rx][1] = '\u2534'; // '┴'
        // XXX If we alter iheight and ibottom for no borders - nothing should be written here
        if (!self.border.bottom) {
          lines[yi + ry][xi + rx][1] = '\u2502'; // '│'
        }
        lines[yi + ry].dirty = true;
      } else {
        // middle
        rx++;
      }
    });
    ry += 1;
  }

  // Draw internal borders.
  for (ry = 1; ry < height; ry++) {
    if (!lines[yi + ry]) break;
    rx = 0;
    self._maxes.slice(0, -1).forEach(function(max) {
      rx += max;
      if (!lines[yi + ry][xi + rx + 1]) return;
      if (self.options.fillCellBorders !== false) {
        var lbg = lines[yi + ry][xi + rx][0] & 0x1ff;
        rx++;
        lines[yi + ry][xi + rx][0] = (battr & ~0x1ff) | lbg;
      } else {
        rx++;
        lines[yi + ry][xi + rx][0] = battr;
      }
      lines[yi + ry][xi + rx][1] = '\u2502'; // '│'
      lines[yi + ry].dirty = true;
    });
  }

  return coords;
};

/**
 * Expose
 */

module.exports = ListTable;
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