HexLinePositionInfo(HexLinePositionInfoType type, int position, HexCell cell) {
Type = type;
Position = position;
CellPosition = position - cell.CellSpan.Start;
if (CellPosition < 0)
throw new ArgumentOutOfRangeException(nameof(position));
Cell = cell;
}
public override PositionAndData? EditValueCell(HexCell cell, int cellPosition, char c) {
if (cell == null)
throw new ArgumentNullException(nameof(cell));
if (cell.BufferSpan.Buffer != Buffer)
throw new ArgumentException();
if ((uint)cellPosition >= (uint)cell.CellSpan.Length)
throw new ArgumentOutOfRangeException(nameof(cellPosition));
if (!cell.HasData)
return null;
return valueFormatter.Edit(cell.BufferStart, cellPosition, c);
}
public override HexBufferSpan GetValueBufferSpan(HexCell cell, int cellPosition) {
if (cell == null)
throw new ArgumentNullException(nameof(cell));
if (cellPosition < 0 || cellPosition >= cell.CellSpan.Length)
throw new ArgumentOutOfRangeException(nameof(cellPosition));
return valueFormatter.GetBufferSpan(cell.BufferSpan, cellPosition);
}
Rect GetCaretRect(HexViewLine line, bool drawOverwriteMode, HexColumnType column, HexCell cell, int cellPosition) {
if (cell == null)
return new Rect();
int linePosition = cell.CellSpan.Start + Math.Max(0, Math.Min(cell.CellSpan.Length - 1, cellPosition));
if (hexCaret.CurrentPosition.ActiveColumn != column) {
var r = ToRect(line.GetNormalizedTextBounds(cell.CellSpan));
return new Rect(r.X, r.Bottom - INACTIVE_CARET_HEIGHT, r.Width, INACTIVE_CARET_HEIGHT);
}
else if (drawOverwriteMode) {
var textBounds = line.GetExtendedCharacterBounds(linePosition);
var left = textBounds.Left;
var top = line.TextTop;
var width = textBounds.Width;
var height = line.TextHeight;
return new Rect(left, top, width, height);
}
else {
double left;
if (linePosition != 0 && linePosition <= line.BufferLine.Text.Length)
left = line.GetExtendedCharacterBounds(linePosition - 1).Trailing;
else
left = line.GetExtendedCharacterBounds(linePosition).Leading;
var top = line.TextTop;
var width = SystemParameters.CaretWidth;
var height = line.TextHeight;
return new Rect(left, top, width, height);
}
}
static int GetLength(int linePosition, HexCell a) {
int sl = Math.Abs(linePosition - a.FullSpan.Start);
int el = Math.Abs(linePosition - (a.FullSpan.End - 1));
return Math.Min(sl, el);
}
static int Compare(int linePosition, HexCell a, HexCell b) {
int da = GetLength(linePosition, a);
int db = GetLength(linePosition, b);
return da - db;
}
static KeyValuePair<HexCell, int>? GetVisible(HexCellCollection collection, HexCell cell) {
if (cell.HasData)
throw new ArgumentException();
for (int i = cell.Index + 1; i < collection.Count; i++) {
var c = collection[i];
if (!c.HasData)
continue;
return new KeyValuePair<HexCell, int>(c, 0);
}
for (int i = cell.Index - 1; i >= 0; i--) {
var c = collection[i];
if (!c.HasData)
continue;
return new KeyValuePair<HexCell, int>(c, c.CellSpan.Length - 1);
}
return null;
}
TextAndHexSpan Create(HexCellCollection collection, HexCell first, HexCell last, HexBufferSpan bufferSpan) {
var firstCellSpan = first.FullSpan;
var lastCellSpan = last.FullSpan;
var startPos = HexPosition.MaxEndPosition;
var endPos = HexPosition.Zero;
for (int i = first.Index; i <= last.Index; i++) {
var cell = collection[i];
if (!cell.HasData)
continue;
startPos = HexPosition.Min(startPos, cell.BufferStart);
endPos = HexPosition.Max(endPos, cell.BufferEnd);
}
var resultBufferSpan = startPos <= endPos ?
new HexBufferSpan(new HexBufferPoint(Buffer, startPos), new HexBufferPoint(Buffer, endPos)) :
bufferSpan;
return new TextAndHexSpan(VST.Span.FromBounds(firstCellSpan.Start, lastCellSpan.End), resultBufferSpan);
}
/// <summary> /// Edits a value cell. Returns null if editing isn't supported or if the character /// isn't a valid input character (eg. it's not a hex digit character), else it /// returns the position in the buffer and new value. /// </summary> /// <param name="cell">Cell</param> /// <param name="cellPosition">Position within the cell</param> /// <param name="c">Character</param> /// <returns></returns> public abstract PositionAndData? EditValueCell(HexCell cell, int cellPosition, char c);
/// <summary> /// Gets a buffer span within a cell /// </summary> /// <param name="cell">Cell</param> /// <param name="cellPosition">Position within the cell</param> /// <returns></returns> public abstract HexBufferSpan GetValueBufferSpan(HexCell cell, int cellPosition);
HexLinePositionInfo(HexLinePositionInfoType type, int position, int cellPosition) {
Type = type;
Position = position;
CellPosition = cellPosition;
Cell = null;
}
/// <summary>
/// Creates a position within an ASCII cell
/// </summary>
/// <param name="linePosition">Line position</param>
/// <param name="cell">Cell</param>
/// <returns></returns>
public static HexLinePositionInfo CreateAscii(int linePosition, HexCell cell) {
if (linePosition < 0)
throw new ArgumentOutOfRangeException(nameof(linePosition));
if (cell == null)
throw new ArgumentNullException(nameof(cell));
return new HexLinePositionInfo(HexLinePositionInfoType.AsciiCell, linePosition, cell);
}