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InterpreterEdit.cs
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InterpreterEdit.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace kOS
{
public class InterpreterEdit : ExecutionContext
{
int BufferWidth { get { return buffer.GetLength(0); } }
int BufferHeight { get { return buffer.GetLength(1); } }
int CursorLine = 0;
int CursorCol = 0;
int ProgramSize = 0;
String CurrentLine { get { return File[CursorLine]; } set { File[CursorLine] = value; } }
int LocalCursorCol { get { return CursorCol < CurrentLine.Length ? CursorCol : CurrentLine.Length; } }
int ScrollY = 0;
int ScrollX = 0;
int CursorX = 0;
int CursorY = 0;
private new char[,] buffer = new char[COLUMNS, ROWS];
String StatusAnimString = "";
float StatusAnimProg = 0;
bool StatusAnimActive = false;
File File;
public override int GetCursorX()
{
return ChildContext != null ? ChildContext.GetCursorX() : CursorX;
}
public override int GetCursorY()
{
return ChildContext != null ? ChildContext.GetCursorX() : CursorY;
}
public InterpreterEdit(String fileName, ExecutionContext parent) : base(parent)
{
File = SelectedVolume.GetByName(fileName);
if (File == null)
{
File = new File(fileName);
File.Add("");
}
CursorX = 0;
CursorY = 2;
RecalcProgramSize();
}
public override void Update(float time)
{
ClearScreen();
Print(0, 0, File.Filename, 20);
PrintBorder(1);
PrintBorder(BufferHeight - 2);
String LineColReadout = "Ln " + CursorLine + " Col " + LocalCursorCol;
Print(BufferWidth - LineColReadout.Length, 0, LineColReadout);
String ProgramSizeStr = ProgramSize.ToString() + "B";
Print(BufferWidth - ProgramSizeStr.Length, BufferHeight - 1, ProgramSizeStr);
if (LocalCursorCol > ScrollX + BufferWidth) ScrollX = LocalCursorCol - BufferWidth;
else if (LocalCursorCol < ScrollX) ScrollX = 0;
if (CursorLine > ScrollY + (BufferHeight - 5)) ScrollY = CursorLine - (BufferHeight - 5);
else if (CursorLine < ScrollY) ScrollY = CursorLine;
UpdateBuffer();
CursorX = LocalCursorCol - ScrollX;
CursorY = CursorLine - ScrollY + 2;
// Status bar
if (StatusAnimActive)
{
StatusAnimProg += time;
if (StatusAnimProg > 3) StatusAnimActive = false;
int charsToDisp = (int)(StatusAnimProg * 20);
Print(0, BufferHeight - 1, StatusAnimString, charsToDisp);
}
else
{
String MenuOptions = "[F5:Save] [F10:Exit]";
Print(0, BufferHeight - 1, MenuOptions);
}
}
private void RecalcProgramSize()
{
ProgramSize = File.GetSize();
}
private void ClearScreen()
{
for (int y = 0; y < buffer.GetLength(1); y++)
{
for (int x = 0; x < buffer.GetLength(0); x++)
{
buffer[x, y] = (char)0;
}
}
}
public override char[,] GetBuffer()
{
return buffer;
}
private void UpdateBuffer()
{
for (int y = 2; y < BufferHeight - 2; y++)
{
int row = (y - 2) + ScrollY;
if (row < File.Count())
{
if (ScrollX < File[row].Length)
{
Print(0, y, File[row].Substring(ScrollX));
}
}
}
}
public override bool Type(char ch)
{
switch (ch)
{
case (char)8:
Backspace();
break;
case (char)13:
Enter();
break;
default:
File[CursorLine] = File[CursorLine].Insert(LocalCursorCol, new String(ch, 1));
CursorCol = LocalCursorCol + 1;
break;
}
RecalcProgramSize();
return true;
}
public void ArrowKey(kOSKeys key)
{
if (key == kOSKeys.UP && CursorLine > 0) CursorLine--;
if (key == kOSKeys.DOWN && CursorLine < File.Count - 1) CursorLine++;
if (key == kOSKeys.RIGHT)
{
if (CursorCol < CurrentLine.Length)
{
CursorCol = LocalCursorCol + 1;
}
else
{
if (CursorLine < File.Count - 1)
{
CursorLine ++;
CursorCol = 0;
}
}
}
if (key == kOSKeys.LEFT)
{
if (CursorCol > 0)
{
CursorCol = LocalCursorCol - 1;
}
else
{
if (CursorLine > 0)
{
CursorLine--;
CursorCol = CurrentLine.Length;
}
}
}
}
public override bool SpecialKey(kOSKeys key)
{
switch (key)
{
case kOSKeys.F5:
Save();
return true;
case kOSKeys.F10:
Exit();
return true;
case kOSKeys.HOME:
CursorCol = 0;
return true;
case kOSKeys.END:
CursorCol = CurrentLine.Length;
return true;
case kOSKeys.DEL:
Delete();
return true;
case kOSKeys.UP:
case kOSKeys.LEFT:
case kOSKeys.RIGHT:
case kOSKeys.DOWN:
ArrowKey(key);
return true;
}
return false;
}
private void Enter()
{
String fragment = CurrentLine.Substring(LocalCursorCol);
CurrentLine = CurrentLine.Substring(0, LocalCursorCol);
File.Insert(CursorLine + 1, fragment);
CursorCol = 0;
CursorLine++;
}
private void Backspace()
{
if (LocalCursorCol > 0)
{
CursorCol = LocalCursorCol - 1;
File[CursorLine] = File[CursorLine].Remove(LocalCursorCol, 1);
}
else
{
if (CursorLine > 0)
{
String fragment = CurrentLine.Trim();
CursorLine--;
File.RemoveAt(CursorLine + 1);
CursorCol = CurrentLine.Length;
CurrentLine += fragment;
}
}
}
public void Delete()
{
if (CursorCol < CurrentLine.Length)
{
File[CursorLine] = File[CursorLine].Remove(LocalCursorCol, 1);
}
else if (File.Count() > CursorLine + 1)
{
String otherLine = File[CursorLine + 1];
File.RemoveAt(CursorLine + 1);
CurrentLine += otherLine;
}
}
public void Print(int sx, int sy, String value)
{
Print(sx, sy, value, value.Length);
}
public void Print(int sx, int sy, String value, int max)
{
char[] chars = value.ToCharArray();
int i = 0;
for (int x = sx; (x < BufferWidth && i < chars.Count() && i < max); x++)
{
buffer[x, sy] = chars[i];
i++;
}
}
public void PrintBorder(int y)
{
for (int x = 0; x < BufferWidth; x++)
{
buffer[x, y] = '-';
}
}
private void Exit()
{
State = ExecutionState.DONE;
}
private void Save()
{
if (SelectedVolume.SaveFile(File))
{
StatusAnimString = "SAVED.";
}
else
{
StatusAnimString = "CAN'T SAVE - DISK FULL.";
}
StatusAnimActive = true;
StatusAnimProg = 0;
}
}
}