/// <summary>
/// Applies the specified format to this screen cell.
/// </summary>
/// <param name="format">The format to apply.</param>
public void ApplyFormat(ScreenCellFormat format)
{
if (format == null)
{
return;
}
this.Modifications = ScreenCellModifications.None;
if (format.BoldMode)
{
this.Modifications |= ScreenCellModifications.Bold;
}
if (format.UnderlineMode)
{
this.Modifications |= ScreenCellModifications.Underline;
}
if (format.ReverseMode)
{
this.BackgroundColor = format.ForegroundColor;
this.ForegroundColor = format.BackgroundColor;
}
else
{
this.BackgroundColor = format.BackgroundColor;
this.ForegroundColor = format.ForegroundColor;
}
}
/// <summary>
/// Applies the specified format to the cursor position.
/// </summary>
/// <param name="format">The format to apply.</param>
public void ApplyFormatToCursor(ScreenCellFormat format)
{
var line = this.screen.CurrentBuffer[this.screen.CursorRow];
var cell = line[this.screen.CursorColumn];
cell.ApplyFormat(format);
this.changed = true;
this.contentChanged = true;
}
/// <summary>
/// Erases the specified area of the screen (fills it with blanks/space chars) and applies the specified format to each cell in the erased area.
/// </summary>
/// <param name="startRow">The start row (zero-based).</param>
/// <param name="startColumn">The start column (zero-based).</param>
/// <param name="endRow">The end row (zero-based), larger or equal to <paramref name="startRow"/>.</param>
/// <param name="endColumn">The end column (zero-based), larger or equal to <paramref name="startColumn"/>.</param>
/// <param name="format">The format applied to the erased area.</param>
public void Erase(int startRow, int startColumn, int endRow, int endColumn, ScreenCellFormat format)
{
Screen display = this.screen;
ScreenLine line;
ScreenCell cell;
for (int row = startRow; row <= endRow; row++)
{
line = display.CurrentBuffer[row];
int startColumnLine = row == startRow ? startColumn : 0;
int endColumnLine = row == endRow ? endColumn : this.screen.ColumnCount - 1;
for (int column = startColumnLine; column <= endColumnLine; column++)
{
cell = line[column];
cell.Character = ' ';
cell.ApplyFormat(format);
this.changed = true;
this.contentChanged = true;
}
}
}
/// <summary>
/// Applies the specified format to the cursor position.
/// </summary>
/// <param name="format">The format to apply.</param>
public void ApplyFormatToCursor(ScreenCellFormat format)
{
var line = this.screen.CurrentBuffer[this.screen.CursorRow];
var cell = line[this.screen.CursorColumn];
cell.ApplyFormat(format);
this.changed = true;
this.contentChanged = true;
}
/// <summary>
/// Erases the specified area of the screen (fills it with blanks/space chars) and applies the specified format to each cell in the erased area.
/// </summary>
/// <param name="startRow">The start row (zero-based).</param>
/// <param name="startColumn">The start column (zero-based).</param>
/// <param name="endRow">The end row (zero-based), larger or equal to <paramref name="startRow"/>.</param>
/// <param name="endColumn">The end column (zero-based), larger or equal to <paramref name="startColumn"/>.</param>
/// <param name="format">The format applied to the erased area.</param>
public void Erase(int startRow, int startColumn, int endRow, int endColumn, ScreenCellFormat format)
{
Screen display = this.screen;
ScreenLine line;
ScreenCell cell;
for (int row = startRow; row <= endRow; row++)
{
line = display.CurrentBuffer[row];
int startColumnLine = row == startRow ? startColumn : 0;
int endColumnLine = row == endRow ? endColumn : this.screen.ColumnCount - 1;
for (int column = startColumnLine; column <= endColumnLine; column++)
{
cell = line[column];
cell.Character = ' ';
cell.ApplyFormat(format);
this.changed = true;
this.contentChanged = true;
}
}
}
/// <summary>
/// Draws a character to the screen while no connection is established.
/// </summary>
/// <param name="ch">The character to draw.</param>
/// <param name="modifier">The existing screen modifier.</param>
/// <param name="echo">A value indicating whether to draw the character to the terminal in plain text (<see cref="false"/> for password input with * characters).</param>
private void DrawLocalModeChar(char ch, IScreenModifier modifier, bool echo)
{
ScreenCellFormat defaultFormat = new ScreenCellFormat();
switch (ch)
{
case '\r':
modifier.CursorColumn = 0;
break;
case '\n':
modifier.CursorRowIncreaseWithScroll(null, null);
break;
default:
modifier.CursorCharacter = echo ? ch : '*';
modifier.ApplyFormatToCursor(defaultFormat);
if (modifier.CursorColumn + 1 >= this.Screen.ColumnCount)
{
modifier.CursorColumn = 0;
modifier.CursorRowIncreaseWithScroll(scrollTop: null, scrollBottom: null);
}
else
{
modifier.CursorColumn++;
}
break;
}
}
/// <summary>
/// Saves or restores the cursor.
/// </summary>
/// <param name="cursorRow">When <paramref name="save"/> is true: the cursor row to save; else it is set to the restored cursor row.</param>
/// <param name="cursorColumn">When <paramref name="save"/> is true: the cursor column to save; else it is set to the restored cursor row.</param>
/// <param name="save">A value indicating whether to save the cursor (true), or restore it (false).</param>
private void SaveOrRestoreCursor(ref int cursorRow, ref int cursorColumn, bool save)
{
if (save)
{
this.savedCursor = new SavedCursor(cursorRow, cursorColumn, this.currentFormat);
}
else
{
if (this.savedCursor == null)
{
return;
}
cursorRow = this.savedCursor.CursorRow;
cursorColumn = this.savedCursor.CursorColumn;
this.currentFormat = this.savedCursor.Format.Clone();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SavedCursor"/> class.
/// </summary>
/// <param name="cursorRow">The cursor row to save.</param>
/// <param name="cursorColumn">The cursor column to save.</param>
/// <param name="currentFormat">The current format to save.</param>
public SavedCursor(int cursorRow, int cursorColumn, ScreenCellFormat currentFormat)
{
this.CursorRow = cursorRow;
this.CursorColumn = cursorColumn;
this.Format = currentFormat.Clone();
}
/// <summary>
/// Applies the specified format to this screen cell.
/// </summary>
/// <param name="format">The format to apply.</param>
public void ApplyFormat(ScreenCellFormat format)
{
if (format == null)
{
return;
}
this.Modifications = ScreenCellModifications.None;
if (format.BoldMode)
{
this.Modifications |= ScreenCellModifications.Bold;
}
if (format.UnderlineMode)
{
this.Modifications |= ScreenCellModifications.Underline;
}
if (format.ReverseMode)
{
this.BackgroundColor = format.ForegroundColor;
this.ForegroundColor = format.BackgroundColor;
}
else
{
this.BackgroundColor = format.BackgroundColor;
this.ForegroundColor = format.ForegroundColor;
}
}
