initial commit
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i2p
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using System;
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using System.Drawing;
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using System.Windows.Forms;
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namespace Pulsar.Server.Controls.HexEditor
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{
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public class StringViewHandler
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{
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#region Field
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/// <summary>
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/// Contains the boundary of
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/// a single line
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/// </summary>
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Rectangle _recStringView;
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/// <summary>
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/// Contains the format of the
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/// string to be used in the
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/// string view
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/// </summary>
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StringFormat _stringFormat;
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private HexEditor _editor;
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#endregion
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#region Properties
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public int MaxWidth
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{
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get { return _recStringView.X + _recStringView.Width; }
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}
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#endregion
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#region Constructor
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public StringViewHandler(HexEditor editor)
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{
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_editor = editor;
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//Set String format for the values
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_stringFormat = new StringFormat(StringFormat.GenericTypographic);
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_stringFormat.Alignment = StringAlignment.Center;
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_stringFormat.LineAlignment = StringAlignment.Center;
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}
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#endregion
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#region KeyMouseEvents
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#region Key
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public void OnKeyPress(KeyPressEventArgs e)
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{
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if (!Char.IsControl(e.KeyChar))
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{
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HandleUserInput(e.KeyChar);
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}
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}
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public void OnKeyDown(KeyEventArgs e)
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{
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if (e.KeyCode == Keys.Delete || e.KeyCode == Keys.Back)
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{
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if (_editor.SelectionLength > 0)
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{
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//Remove the selected bytes
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HandleUserRemove();
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int index = _editor.CaretIndex;
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Point newLocation = GetCaretLocation(index);
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_editor.SetCaretStart(index, newLocation);
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}
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else if (_editor.CaretIndex < _editor.LastVisibleByte && e.KeyCode == Keys.Delete)
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{
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//Remove the byte after the caret
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_editor.RemoveByteAt(_editor.CaretIndex);
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Point newLocation = GetCaretLocation(_editor.CaretIndex);
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_editor.SetCaretStart(_editor.CaretIndex, newLocation);
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}
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else if (_editor.CaretIndex > 0 && e.KeyCode == Keys.Back)
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{
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//Remove byte before the caret
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int index = _editor.CaretIndex - 1;
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_editor.RemoveByteAt(index);
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Point newLocation = GetCaretLocation(index);
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_editor.SetCaretStart(index, newLocation);
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}
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}
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else if (e.KeyCode == Keys.Up && (_editor.CaretIndex - _editor.BytesPerLine) >= 0)
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{
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int index = _editor.CaretIndex - _editor.BytesPerLine;
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//Check ig caret is att the end of the line
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if (index % _editor.BytesPerLine == 0 && _editor.CaretPosX >= _recStringView.X + _recStringView.Width)
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{
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Point position = new Point(_editor.CaretPosX, _editor.CaretPosY - _recStringView.Height);
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//check that this is not the last row (nothing above)
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if (index == 0)
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{
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//Last row do not change index and position
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position = new Point(_editor.CaretPosX, _editor.CaretPosY);
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index = _editor.BytesPerLine;
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}
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if (e.Shift)
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_editor.SetCaretEnd(index, position);
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else
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_editor.SetCaretStart(index, position);
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}
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else
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{
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HandleArrowKeys(index, e.Shift);
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}
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}
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else if (e.KeyCode == Keys.Down && (_editor.CaretIndex - 1) / _editor.BytesPerLine < _editor.HexTableLength / _editor.BytesPerLine)
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{
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int index = _editor.CaretIndex + _editor.BytesPerLine;
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if (index > _editor.HexTableLength)
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{
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index = _editor.HexTableLength;
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HandleArrowKeys(index, e.Shift);
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}
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else
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{
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Point position = new Point(_editor.CaretPosX, _editor.CaretPosY + _recStringView.Height);
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if (e.Shift)
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_editor.SetCaretEnd(index, position);
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else
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_editor.SetCaretStart(index, position);
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}
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}
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else if (e.KeyCode == Keys.Left && (_editor.CaretIndex - 1) >= 0)
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{
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int index = _editor.CaretIndex - 1;
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HandleArrowKeys(index, e.Shift);
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}
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else if (e.KeyCode == Keys.Right && (_editor.CaretIndex + 1) <= _editor.LastVisibleByte)
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{
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int index = _editor.CaretIndex + 1;
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HandleArrowKeys(index, e.Shift);
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}
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}
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public void HandleArrowKeys(int index, bool isShiftDown)
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{
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Point newLocation = GetCaretLocation(index);
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if (isShiftDown)
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_editor.SetCaretEnd(index, newLocation);
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else
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_editor.SetCaretStart(index, newLocation);
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}
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#endregion
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#region Mouse
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public void OnMouseDown(int x, int y)
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{
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int iX = (x - _recStringView.X) / (int)_editor.CharSize.Width;
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int iY = (y - _recStringView.Y) / _recStringView.Height;
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//Check that values are good
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iX = iX > _editor.BytesPerLine ? _editor.BytesPerLine : iX;
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iX = iX < 0 ? 0 : iX;
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iY = iY > _editor.MaxBytesV ? _editor.MaxBytesV : iY;
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iY = iY < 0 ? 0 : iY;
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//Make sure values are withing the given bounds
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if ((_editor.LastVisibleByte - _editor.FirstVisibleByte) / _editor.BytesPerLine <= iY)
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{
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//Check that column is not greater than max
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if ((_editor.LastVisibleByte - _editor.FirstVisibleByte) % _editor.BytesPerLine <= iX)
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{
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iX = (_editor.LastVisibleByte - _editor.FirstVisibleByte) % _editor.BytesPerLine;
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}
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iY = (_editor.LastVisibleByte - _editor.FirstVisibleByte) / _editor.BytesPerLine;
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}
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//Get the smallest possible location (do not want to exceed the max)
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int index = Math.Min(_editor.LastVisibleByte, _editor.FirstVisibleByte + iX + iY * _editor.BytesPerLine);
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int xPos = (iX * (int)_editor.CharSize.Width) + _recStringView.X;
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int yPos = (iY * _recStringView.Height) + _recStringView.Y;
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_editor.SetCaretStart(index, new Point(xPos, yPos));
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}
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public void OnMouseDragged(int x, int y)
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{
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int iX = (x - _recStringView.X) / (int)_editor.CharSize.Width;
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int iY = (y - _recStringView.Y) / _recStringView.Height;
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//Check that values are good
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iX = iX > _editor.BytesPerLine ? _editor.BytesPerLine : iX;
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iX = iX < 0 ? 0 : iX;
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iY = iY > _editor.MaxBytesV ? _editor.MaxBytesV : iY;
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if (_editor.FirstVisibleByte > 0)
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{
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iY = iY < 0 ? -1 : iY;
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}
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else
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{
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iY = iY < 0 ? 0 : iY;
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}
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//Make sure values are withing the given bounds
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if ((_editor.LastVisibleByte - _editor.FirstVisibleByte) / _editor.BytesPerLine <= iY)
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{
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//Check that column is not greater than max
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if ((_editor.LastVisibleByte - _editor.FirstVisibleByte) % _editor.BytesPerLine <= iX)
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{
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iX = (_editor.LastVisibleByte - _editor.FirstVisibleByte) % _editor.BytesPerLine;
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}
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iY = (_editor.LastVisibleByte - _editor.FirstVisibleByte) / _editor.BytesPerLine;
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}
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//Get the smallest possible location (do not want to exceed the max)
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int index = Math.Min(_editor.LastVisibleByte, _editor.FirstVisibleByte + iX + iY * _editor.BytesPerLine);
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int xPos = (iX * (int)_editor.CharSize.Width) + _recStringView.X;
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int yPos = (iY * _recStringView.Height) + _recStringView.Y;
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_editor.SetCaretEnd(index, new Point(xPos, yPos));
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}
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public void OnMouseDoubleClick()
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{
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if (_editor.CaretIndex < _editor.LastVisibleByte)
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{
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int index = _editor.CaretIndex + 1;
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Point newLocation = GetCaretLocation(index);
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_editor.SetCaretEnd(index, newLocation);
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}
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}
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#endregion
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#region Focus
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public void Focus()
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{
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int index = _editor.CaretIndex;
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Point location = GetCaretLocation(index);
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_editor.SetCaretStart(index, location);
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}
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#endregion
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#endregion
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#region Paint
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public void Update(int startPositionX, Rectangle area)
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{
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_recStringView = new Rectangle(
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startPositionX,
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area.Y,
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(int)(_editor.CharSize.Width * _editor.BytesPerLine),
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(int)(_editor.CharSize.Height) - 2
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);
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_recStringView.X += _editor.EntityMargin;
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}
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public void Paint(Graphics g, int index, int startIndex)
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{
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Point columnAndRow = GetByteColumnAndRow(index);
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if (_editor.IsSelected(index + startIndex))
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{
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PaintByteAsSelected(g, columnAndRow, (index + startIndex));
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}
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else
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{
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PaintByte(g, columnAndRow, (index + startIndex));
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}
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}
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private void PaintByteAsSelected(Graphics g, Point point, int index)
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{
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SolidBrush backBrush = new SolidBrush(_editor.SelectionBackColor);
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SolidBrush textBrush = new SolidBrush(_editor.SelectionForeColor);
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RectangleF drawSurface = GetBound(point);
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char value = _editor.GetByteAsChar(index);
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string strValue = (Char.IsControl(value) ? "." : value.ToString());
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g.FillRectangle(backBrush, drawSurface);
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g.DrawString(strValue, _editor.Font, textBrush, drawSurface, _stringFormat);
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}
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private void PaintByte(Graphics g, Point point, int index)
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{
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SolidBrush brush = new SolidBrush(_editor.ForeColor);
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RectangleF drawLocation = GetBound(point);
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char value = _editor.GetByteAsChar(index);
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string strValue = (Char.IsControl(value) ? "." : value.ToString());
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g.DrawString(strValue, _editor.Font, brush, drawLocation, _stringFormat);
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}
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#endregion
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#region Caret
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/// <summary>
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/// Get the caret current location
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/// in the given bound.
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/// </summary>
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private Point GetCaretLocation(int index)
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{
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int xPos = _recStringView.X + ((int)_editor.CharSize.Width * (index % _editor.BytesPerLine));
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int yPos = _recStringView.Y + ((int)_recStringView.Height * ((index - (_editor.FirstVisibleByte + index % _editor.BytesPerLine)) / _editor.BytesPerLine));
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Point ret = new Point(xPos, yPos);
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return ret;
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}
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#endregion
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#region Misc
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private void HandleUserRemove()
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{
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//Calculate where to position the caret after the removal
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int index = _editor.SelectionStart;
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Point position = GetCaretLocation(index);
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//Remove all of the selected bytes
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_editor.RemoveSelectedBytes();
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//Set the new position of the caret
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_editor.SetCaretStart(index, position);
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}
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private void HandleUserInput(char key)
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{
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if (!_editor.CaretFocused)
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return;
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HandleUserRemove();
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byte newByte = Convert.ToByte(key);
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if (_editor.HexTableLength <= 0)
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_editor.AppendByte(newByte);
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else
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_editor.InsertByte(_editor.CaretIndex, newByte);
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int index = _editor.CaretIndex + 1;
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Point newLocation = GetCaretLocation(index);
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_editor.SetCaretStart(index, newLocation);
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}
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private Point GetByteColumnAndRow(int index)
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{
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int column = index % _editor.BytesPerLine;
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int row = index / _editor.BytesPerLine;
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Point ret = new Point(column, row);
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return ret;
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}
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private RectangleF GetBound(Point point)
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{
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RectangleF ret = new RectangleF(
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_recStringView.X + (point.X * (int)_editor.CharSize.Width),
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_recStringView.Y + (point.Y * _recStringView.Height),
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_editor.CharSize.Width,
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_recStringView.Height
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);
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return ret;
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}
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#endregion
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}
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}
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