PlainText.cs

﻿//
// Copyright (C) 2008-2013 Kody Brown (kody@bricksoft.com).
// 
// MIT License:
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//

using System;
using System.IO;

namespace cat
{
	//[Export(typeof(ICataloger))]
	//[ExportMetadata("Extension", '*')]
	public class PlainText : ICataloger
	{
		public string Name { get { return _name; } }
		private string _name = "text";

		public string Description { get { return _description; } }
		private string _description = "Plain-text without any formatting (DEFAULT).";

		public bool CanCat( CatOptions catOptions, string fileName )
		{
			return true;
		}

		public bool Cat( CatOptions catOptions, string fileName )
		{
			return Cat(catOptions, fileName, 0, long.MaxValue);
		}

		public bool Cat( CatOptions catOptions, string fileName, int lineStart, long linesToWrite )
		{
			int lineNumber;
			int padLen;
			int winWidth = Console.WindowWidth - 1;
			string l, lt;

			lineStart = Math.Max(lineStart, 0);
			lineNumber = 0;
			padLen = catOptions.showLineNumbers ? 3 : 0;
			if (linesToWrite < 0) {
				linesToWrite = long.MaxValue;
			}

			using (StreamReader reader = File.OpenText(fileName)) {
				while (!reader.EndOfStream) {
					l = reader.ReadLine();
					lt = l.Trim();
					lineNumber++;

					if (lineNumber < lineStart) {
						continue;
					}

					if (catOptions.ignoreLines.Length > 0 && l.StartsWith(catOptions.ignoreLines, StringComparison.CurrentCultureIgnoreCase)) {
						continue;
					} else if (catOptions.ignoreBlankLines && l.Length == 0) {
						continue;
					} else if (catOptions.ignoreWhitespaceLines && lt.Length == 0) {
						continue;
					}

					if (catOptions.showLineNumbers) {
						Console.BackgroundColor = catOptions.lineNumBackColor;
						Console.ForegroundColor = catOptions.lineNumForeColor;
						Console.Write("{0," + padLen + "}", lineNumber);
						Console.BackgroundColor = catOptions.defaultBackColor;
						Console.ForegroundColor = catOptions.defaultForeColor;
					}

					if (lt.Length > 0) {
						if (catOptions.wrapText) {
							if (catOptions.indentCharacters > 0) {
								Console.WriteLine(Bricksoft.PowerCode.Text.Wrap(l.TrimEnd(), winWidth, 0, catOptions.indentCharacters));
							} else {
								Console.WriteLine(Bricksoft.PowerCode.Text.Wrap(l.TrimEnd(), winWidth, 0, padLen));
							}
						} else {
							Console.WriteLine(l.TrimEnd());
						}
					} else {
						Console.WriteLine("  ");
					}

					if (lineNumber >= linesToWrite) {
						break;
					}
				}

				reader.Close();
			}

			return true;
		}

#if false
		public bool CatOld( CatOptions catOptions, string fileName, int lineStartsAt, string[] lines )
		{
			int lineNumber;
			int padLen;
			int winWidth = Console.WindowWidth - 1;

			if (lines != null && lines.Length > 0) {
				lineNumber = Math.Min(Math.Max(lineStartsAt, 0), lines.Length);
			} else {
				lineNumber = 0;
				lines = File.ReadAllLines(fileName);
			}
			if (catOptions.showLineNumbers) {
				padLen = lines.Length.ToString().Length;
			} else {
				padLen = 0;
			}

			foreach (string l in lines) {
				lineNumber++;

				if (catOptions.showLineNumbers) {
					Console.BackgroundColor = catOptions.lineNumBackColor;
					Console.ForegroundColor = catOptions.lineNumForeColor;
					Console.Write("{0," + padLen + "}", lineNumber);
					Console.BackgroundColor = catOptions.defaultBackColor;
					Console.ForegroundColor = catOptions.defaultForeColor;
				}

				if (catOptions.wrapText) {
					Console.WriteLine(l.Length > 0 ? Bricksoft.PowerCode.Text.Wrap(l.TrimEnd(), winWidth, 0, padLen) : " ");
				} else {
					Console.WriteLine(l.Length > 0 ? l.TrimEnd() : " ");
				}
			}

			return true;
		}
#endif
	}
}