/// <summary>
/// フックプロシージャ
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode == HCBT_ACTIVATE)
{
Commons.RECT rcForm = new Commons.RECT(0, 0, 0, 0);
Commons.RECT rcMsgBox = new Commons.RECT(0, 0, 0, 0);
GetWindowRect(this.ownerWindow.Handle, out rcForm);
GetWindowRect(wParam, out rcMsgBox);
// センター位置を計算する。
int x = (rcForm.Left + (rcForm.Right - rcForm.Left) / 2) - ((rcMsgBox.Right - rcMsgBox.Left) / 2);
int y = (rcForm.Top + (rcForm.Bottom - rcForm.Top) / 2) - ((rcMsgBox.Bottom - rcMsgBox.Top) / 2);
SetWindowPos(wParam, 0, x, y, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
IntPtr result = CallNextHookEx(this.hHook, nCode, wParam, lParam);
// フックを解除する。
UnhookWindowsHookEx(this.hHook);
this.hHook = (IntPtr)0;
return(result);
}
else
{
return(CallNextHookEx(this.hHook, nCode, wParam, lParam));
}
}
/// <summary>
/// 文字列のインデックスに対応する表示座標を取得する(調整済み)
/// FIXME: 無理矢理なので .NET Framework の実装によっては破綻する可能性あり
/// </summary>
/// <param name="textBoxRect">EM_GETRECT で取得した RECT 構造体</param>
/// <param name="index">インデックス</param>
/// <returns>調整済みの表示座標</returns>
public Point GetFixedPositionFromCharIndex(Commons.RECT textBoxRect, int index)
{
Point pointOrig = this.GetPositionFromCharIndex(index);
Point result = new Point(pointOrig.X, pointOrig.Y);
if (!this.Multiline)
{
result.Y += textBoxRect.Top;
}
return(result);
}
private static extern bool GetWindowRect(IntPtr hWnd, out Commons.RECT lpRect);
/// <summary>
/// 表示領域等を計算する(固定長のみ対応)
/// FIXME: 文字末尾にタブがある場合の位置計算がおかしい
/// </summary>
/// <param name="graphics">Graphics</param>
/// <param name="textBoxRect">テキストエリアの領域</param>
/// <param name="baseFontSize">ベースとなるフォントサイズ</param>
/// <returns>計算した領域情報</returns>
private List <DrawDimension> CalcDrawDimensions(Graphics graphics, Commons.RECT textBoxRect, Size baseFontSize)
{
Size baseFontSizeHalf = TextRenderer.MeasureText(graphics, "A", this.displayFont, new Size(), this.textFormatFlags);
string textBoxText = this.Text;
int selectionStart = this.SelectionStart;
int selectionLength = this.SelectionLength;
// 描画対象の文字列インデックス範囲を得る
int firstCharIndex = 0;
int lastCharIndex = textBoxText.Length;
if (this.Multiline)
{
// 最初の位置を得る
int firstVisibleLine = SendMessage(this.Handle, EM_GETFIRSTVISIBLELINE, 0, 0);
if (0 <= firstVisibleLine)
{
int firstIndex = this.GetFirstCharIndexFromLine(firstVisibleLine);
if (0 <= firstIndex)
{
firstCharIndex = firstIndex;
}
}
// 表示行数を得る
int rows = this.ClientSize.Height / baseFontSize.Height;
// 最後の位置を得る
int lastIndex = this.GetFirstCharIndexFromLine(firstVisibleLine + rows);
if (0 <= lastIndex)
{
lastCharIndex = lastIndex;
}
}
List <DrawDimension> drawDimensionList = new List <DrawDimension>();
int columns = 0;
int prevLine = this.GetLineFromCharIndex(firstCharIndex);
for (int chIndex = firstCharIndex; chIndex < lastCharIndex; ++chIndex)
{
if (chIndex < 0 || textBoxText.Length <= chIndex)
{
break;
}
int currentLine = this.GetLineFromCharIndex(chIndex);
string targetSChar = textBoxText.Substring(chIndex, 1);
DrawDimension drawDimension = new DrawDimension(targetSChar);
Point point = this.GetFixedPositionFromCharIndex(textBoxRect, chIndex);
if (drawDimension.Type == DrawType.Emoji)
{
drawDimension.Area = new Rectangle(point.X, point.Y, Commons.TEXT_ICON_WIDTH, Commons.TEXT_ICON_HEIGHT);
columns += 2;
}
else if (drawDimension.Type == DrawType.ControlChar)
{
drawDimension.Area = new Rectangle(point.X, point.Y, baseFontSizeHalf.Width, baseFontSizeHalf.Height);
if (drawDimension.OriginalChar == '\t')
{
int tabColumns = 8 - (columns % 8);
if (chIndex + 1 < textBoxText.Length)
{
Point pointNext = this.GetFixedPositionFromCharIndex(textBoxRect, chIndex + 1);
drawDimension.PaddingArea = new Rectangle(point.X + baseFontSizeHalf.Width, point.Y, pointNext.X - point.X - baseFontSizeHalf.Width, baseFontSizeHalf.Height);
}
else
{
int width = baseFontSizeHalf.Width * tabColumns - baseFontSizeHalf.Width;
drawDimension.PaddingArea = new Rectangle(point.X + baseFontSizeHalf.Width, point.Y, width, baseFontSizeHalf.Height);
}
columns += tabColumns;
}
else if (drawDimension.OriginalChar == '\n')
{
columns = 0;
}
else if (drawDimension.OriginalChar == '\r')
{
// 表示されないので columns には何もしない
}
}
else if (drawDimension.Type == DrawType.NormalChar)
{
// NOTE: とりあえず固定長で考える
if (StringUtils.IsHalfSizeDisplay(targetSChar))
{
drawDimension.Area = new Rectangle(point.X, point.Y, baseFontSizeHalf.Width, baseFontSizeHalf.Height);
columns += 1;
}
else
{
drawDimension.Area = new Rectangle(point.X, point.Y, baseFontSize.Width, baseFontSize.Height);
columns += 2;
}
}
if (selectionStart <= chIndex && chIndex < selectionStart + selectionLength)
{
drawDimension.Selection = true;
// 前行の文字末尾がタブの場合の処理
if (prevLine != currentLine && selectionStart <= chIndex - 1 && 0 < drawDimensionList.Count)
{
DrawDimension prevDrawDimension = drawDimensionList[drawDimensionList.Count - 1];
if (prevDrawDimension.OriginalChar == '\t')
{
Rectangle area = prevDrawDimension.Area;
prevDrawDimension.PaddingArea = new Rectangle(area.X + area.Width, area.Y, textBoxRect.Right - (area.X + area.Width), area.Height);
}
}
}
prevLine = currentLine;
drawDimensionList.Add(drawDimension);
}
return(drawDimensionList);
}
private static extern int SendMessage(IntPtr hWnd, int msg, int wParam, out Commons.RECT lParam);
