コード例 #1
0
ファイル: ListCommand.cs プロジェクト: miguelcastro67/ED.Net
        public override bool Process(string cmd, TextFile textFile, EditorValues editorValues)
        {
            // change page size and list page

            string temp    = cmd.Substring(1);
            int    lines   = 0;
            bool   linesOk = int.TryParse(temp, out lines);

            if (lines > 0)
            {
                editorValues.PageSize = lines;
            }

            if (textFile.Lines > 0)
            {
                int startLine = editorValues.CurrentLine + 1;
                int endLine   = startLine + editorValues.PageSize;

                if (endLine > textFile.Lines)
                {
                    endLine = textFile.Lines;
                }

                if (startLine < endLine)
                {
                    for (int i = startLine; i < endLine; i++)
                    {
                        Output(textFile.DisplayLine(i, true));
                    }
                }
                else
                {
                    Output(textFile.DisplayLine(editorValues.CurrentLine, true));
                }

                editorValues.CurrentLine += editorValues.PageSize;
                if (editorValues.CurrentLine > textFile.Lines - 1)
                {
                    editorValues.CurrentLine = textFile.Lines - 1;
                }
            }
            else
            {
                editorValues.CurrentLine = 0;
            }

            return(false);
        }
コード例 #2
0
        public override bool Process(string cmd, TextFile textFile, EditorValues editorValues)
        {
            if (editorValues.CurrentLine > 0)
            {
                Output(textFile.DisplayLine(editorValues.CurrentLine, true));
            }

            return(false);
        }
コード例 #3
0
        public bool ProcessCommand(string command)
        {
            bool   exit             = false;
            string commandToProcess = command.ToUpper();
            string info             = string.Empty;
            int    repeatLines      = 0;
            string delim            = string.Empty;

            // perform pre-processing

            int  lineNumber  = 0;
            bool isLineNuber = int.TryParse(command, out lineNumber);

            if (isLineNuber && lineNumber <= _TextFile.Lines)
            {
                // entered a line number
                currentLine      = lineNumber;
                commandToProcess = ".";
            }
            else if (command.Length > 1 && command.Substring(0, 1).ToUpper() == "L")
            {
                // change page size and list page

                string temp    = command.Substring(1);
                int    lines   = 0;
                bool   linesOk = int.TryParse(temp, out lines);
                if (lines > 0)
                {
                    pageSize = lines;
                }

                commandToProcess = "L";
            }
            else if (command.Length >= 2 && command.ToUpper().Substring(0, 2) == "EX")
            {
                commandToProcess = "EX";
            }
            else if (command.Length > 1 && command.Substring(0, 1).ToUpper() == "R")
            {
                // possible "replace" command

                repeatLines = GetRepeatLines(command);
                delim       = GetDelimiter(command);

                if (repeatLines == 0)
                {
                    repeatLines      = 1;
                    info             = command.Substring(2);
                    commandToProcess = "R";
                }
                else
                {
                    string[] sections = command.Substring(1).Split(Convert.ToChar(delim));
                    if (sections.Length >= 2)
                    {
                        int    pos   = command.IndexOf(delim);
                        string lines = command.Substring(1, pos - 1);
                        repeatLines = 1;
                        bool linesOk = int.TryParse(lines, out repeatLines);
                        if (linesOk)
                        {
                            info             = command.Substring(pos + 1);
                            commandToProcess = "R";
                        }
                        else
                        {
                            commandToProcess = null;
                        }
                    }
                    else
                    {
                        commandToProcess = null;
                    }
                }
            }
            else if (command.Length > 1 && command.Substring(0, 1).ToUpper() == "D")
            {
                // delete commandToProcess
                repeatLines      = GetRepeatLines(command);
                commandToProcess = "D";
            }

            // process command

            switch (commandToProcess)
            {
            case ".":
                // display current line
                if (currentLine > 0)
                {
                    Output(_TextFile.DisplayLine(currentLine, true));
                }

                break;

            case "":
                // next line

                if (currentLine < _TextFile.Lines)
                {
                    currentLine++;
                }

                Output(_TextFile.DisplayLine(currentLine, true));

                break;

            case "T":
                // top of the text file
                currentLine = 0;
                Output("Top");

                break;

            case "L":
                // list next page

                if (_TextFile.Lines > 0)
                {
                    int startLine = currentLine + 1;
                    int endLine   = startLine + pageSize;

                    if (endLine > _TextFile.Lines)
                    {
                        endLine = _TextFile.Lines;
                    }

                    if (startLine < endLine)
                    {
                        for (int i = startLine; i < endLine; i++)
                        {
                            Output(_TextFile.DisplayLine(i, true));
                        }
                    }
                    else
                    {
                        Output(_TextFile.DisplayLine(currentLine, true));
                    }

                    currentLine += pageSize;
                    if (currentLine > _TextFile.Lines - 1)
                    {
                        currentLine = _TextFile.Lines - 1;
                    }
                }
                else
                {
                    currentLine = 0;
                }

                break;

            case "R":
                // replace

                if (currentLine > 0)
                {
                    if (info == string.Empty)
                    {
                        // replace entire line

                        Console.Write(currentLine.ToString() + " ");
                        string newLine = Console.ReadLine();

                        _TextFile.Replace(currentLine, newLine);
                    }
                    else
                    {
                        // perform calculated replace

                        if (info.IndexOf(delim) > -1)
                        {
                            string[] replacementInfo = info.Split(Convert.ToChar(delim));
                            string   oldText         = replacementInfo[0];
                            string   newText         = replacementInfo[1];

                            for (int i = currentLine; i <= currentLine + repeatLines - 1; i++)
                            {
                                if (oldText == "" && newText != "")
                                {
                                    // insert new text in front of the line
                                    _TextFile.Insert(i, newText);
                                }
                                else if (oldText != "" && newText != "")
                                {
                                    // replace old text with new text
                                    _TextFile.Replace(i, oldText, newText);
                                }
                                else if (oldText != "" && newText == "" && replacementInfo.Length > 2)
                                {
                                    // remove old text
                                    _TextFile.Replace(i, oldText, "");
                                }

                                Output(_TextFile.DisplayLine(i, true));
                            }
                        }

                        currentLine += repeatLines - 1;
                    }
                }

                break;

            case "I":
                // insert lines

                bool exitInsert = false;
                while (!exitInsert)
                {
                    Console.Write(string.Format("{0:000}+", currentLine));
                    string newLine = Console.ReadLine();
                    if (newLine != string.Empty)
                    {
                        _TextFile.Insert(currentLine, newLine, true);
                        currentLine++;
                    }
                    else
                    {
                        exitInsert = true;
                    }
                }

                break;

            case "D":
                // delete lines

                if (currentLine > 0)
                {
                    if (repeatLines == 0)
                    {
                        // delete current line
                        _TextFile.Delete(currentLine);
                    }
                    else
                    {
                        // delete multiple lines

                        if (info.IndexOf(delim) > -1)
                        {
                            int lastLine = currentLine + repeatLines - 1;
                            if (lastLine > _TextFile.Lines)
                            {
                                lastLine = _TextFile.Lines;
                            }

                            for (int i = currentLine; i <= lastLine; i++)
                            {
                                _TextFile.Delete(currentLine);
                            }
                        }
                    }
                }

                break;

            case "X":
                // cancel changes

                _TextFile.Cancel();

                if (currentLine > _TextFile.Lines)
                {
                    currentLine = _TextFile.Lines;
                }

                break;

            case "F":
                // flip

                _TextFile.Flip();

                break;

            case "FS":
                // file-save and stay

                _TextFile.Flip();
                _TextFile.Save();

                Output("Saved");

                break;

            case "FI":
                // file-save and exit

                _TextFile.Flip();
                _TextFile.Save();

                Output("Saved");

                exit = true;

                break;

            case "EX":
                // exit

                if (_TextFile.HasChanged)
                {
                    ReceiveInputEventArgs args = new ReceiveInputEventArgs("File has changed.  Exit without saving (Y/N)? ");
                    OnReceiveInput(args);
                    if (args.InputValue.Substring(0, 1).ToUpper() == "Y")
                    {
                        exit = true;
                    }
                }
                else
                {
                    exit = true;
                }

                break;

            case "?":
                // help

                Output("-- ED.Net");
                Output("-- A Pick-like line editor developed in C#");
                Output("-- www.melvicorp.com");
                Output("");
                Output("Available commands and instructions:");
                Output("");
                Output(".");
                Output("   Displays the current line.");
                Output("{enter}");
                Output("   Displays the current line and increments the current line number.");
                Output("L[xx]");
                Output("   Lists the next page of text lines based on the current page size");
                Output("   (20 by default).  If [xx] is specfied, then [xx] number of lines");
                Output("   are listed and the current page size is reset to [xx] number of lines.");
                Output("T");
                Output("   Sets the current line counter to the top of the file.");
                Output("R[xx][/old/new");
                Output("   Performs a 'replace' operation.");
                Output("   If 'R' is used on its own then you are given the opportunity to");
                Output("   replace the entire line.  Specifying [xx] will perform the 'replace'");
                Output("   operation for [xx] number of lines.");
                Output("   The 'old' and 'new' specify the text you want to replace and with");
                Output("   what you it to be replaced.  The delimiter specified as '/' can be");
                Output("   any character you like in order to use any other characters");
                Output("   in the 'old' and 'new' text.  Specifying no 'old' text will insert");
                Output("   the 'new' text at the beginning of the line(s).");
                Output("   Usage examples:");
                Output("      R/Using/Imports");
                Output("        Replaces all instances of 'Using' with the text 'Imports'.");
                Output("      R12/Using/Imports");
                Output("        Performs the same operation for the next 12 lines.");
                Output("      R5//''");
                Output("        Inserts two tick marks in front of of the next 5 lines.");
                Output("      R5..//");
                Output("        Inserts two slashes in front of the next five lines.");
                Output("      R.1/5/2008.01/05/2008");
                Output("        Replaces the text '1/5/2008' with the text '01/05/2008'.");
                Output("I[xx]");
                Output("   Places the editor into 'Insert' mode at a point immediately following");
                Output("   the current line.  Hitting {enter} on a line witout typing any text");
                Output("   will exit 'Insert' mode.  Specifying [xx] will end 'Insert' mode");
                Output("   after [xx] number of lines are inserted.");
                Output("AL[xx]/text");
                Output("   Performs an append opperation to a line or to [xx] number of lines.");
                Output("   The delimiter specified by the '/' can be any character in order to");
                Output("   accomodate any text to be appended (similarly to the 'R' command).");
                Output("D[xx]");
                Output("   Deletes the current line or [xx] number of lines.");
                Output("X");
                Output("   Rolls back the all changes since the last 'flip'");
                Output("   (see the commands below).");
                Output("F");
                Output("   Performs a 'flip' operation.  When any 'replace', insert', 'append',");
                Output("   or 'delete' command is performed, the operations are not permanent in memory ");
                Output("   until they are 'flipped', so they can be rolled back");
                Output("   using the 'X' command.  Performing a 'flip' operation brings those");
                Output("   changes to permanent status.  Note, permanent does not signify 'saved'.");
                Output("FS");
                Output("   Performs a 'flip' operation followed by a 'save' operation.");
                Output("FI");
                Output("   Performs a 'flip' operation followed by a 'save' operation; afterwhich");
                Output("   the edit is exited.");
                Output("EX");
                Output("   Exits the editor in the current state of the file.  If the file has");
                Output("   changed since it was initially read in, the user will receive a");
                Output("   confirmation message.");
                Output("");

                break;
            }

            return(exit);
        }
コード例 #4
0
        public override bool Process(string cmd, TextFile textFile, EditorValues editorValues)
        {
            bool cont = false;

            editorValues.RepeatLines = GetRepeatLines(cmd);
            editorValues.Delim       = GetDelimiter(cmd);

            if (editorValues.RepeatLines == 0)
            {
                editorValues.RepeatLines = 1;
                editorValues.CommandInfo = cmd.Substring(2);
                cont = true;
            }
            else
            {
                string[] sections = cmd.Substring(1).Split(Convert.ToChar(editorValues.Delim));
                if (sections.Length >= 2)
                {
                    int    pos   = cmd.IndexOf(editorValues.Delim);
                    string lines = cmd.Substring(1, pos - 1);
                    editorValues.RepeatLines = 1;
                    int  repeatLines = editorValues.RepeatLines;
                    bool linesOk     = int.TryParse(lines, out repeatLines);
                    if (linesOk)
                    {
                        editorValues.CommandInfo = cmd.Substring(pos + 1);
                        editorValues.RepeatLines = repeatLines;
                        cont = true;
                    }
                }
            }

            if (cont)
            {
                if (editorValues.CurrentLine > 0)
                {
                    if (editorValues.CommandInfo == string.Empty)
                    {
                        // replace entire line

                        Console.Write(editorValues.CurrentLine.ToString() + " ");
                        string newLine = Console.ReadLine();

                        textFile.Replace(editorValues.CurrentLine, newLine);
                    }
                    else
                    {
                        // perform calculated replace

                        if (editorValues.CommandInfo.IndexOf(editorValues.Delim) > -1)
                        {
                            string[] replacementInfo = editorValues.CommandInfo.Split(Convert.ToChar(editorValues.Delim));
                            string   oldText         = replacementInfo[0];
                            string   newText         = replacementInfo[1];

                            for (int i = editorValues.CurrentLine; i <= editorValues.CurrentLine + editorValues.RepeatLines - 1; i++)
                            {
                                if (oldText == "" && newText != "")
                                {
                                    // insert new text in front of the line
                                    textFile.Insert(i, newText);
                                }
                                else if (oldText != "" && newText != "")
                                {
                                    // replace old text with new text
                                    textFile.Replace(i, oldText, newText);
                                }
                                else if (oldText != "" && newText == "" && replacementInfo.Length > 2)
                                {
                                    // remove old text
                                    textFile.Replace(i, oldText, "");
                                }

                                Output(textFile.DisplayLine(i, true));
                            }
                        }

                        editorValues.CurrentLine += editorValues.RepeatLines - 1;
                    }
                }
            }

            return(false);
        }