Color selBackground;
Color selForeground;
- int targetColumn = -1;//handle line changes with long->short->long line length sequence.
- //Point mouseLocalPos = -1;//mouse coord in widget space, filled only when clicked
-
+ int targetColumn = -1;//handle line changes with long->short->long line length sequence.
protected CharLocation? hoverLoc = null;
protected CharLocation? currentLoc = null;
/// </summary>
/// <returns><c>true</c> if move succeed</returns>
public bool MoveLeft(){
- targetColumn = -1;
+ //targetColumn = -1;
CharLocation loc = currentLoc.Value;
if (loc.Column == 0) {
if (loc.Line == 0)
currentLoc = new CharLocation (loc.Line, loc.Column + 1);
return true;
}
- public bool MoveUp () {
+ public bool LineMove (int lineDiff) {
CharLocation loc = currentLoc.Value;
- if (loc.Line == 0)
- return false;
-
- if (loc.Column > lines[loc.Line - 1].Length) {
- if (targetColumn < 0)
- targetColumn = loc.Column;
- currentLoc = new CharLocation (loc.Line - 1, lines[loc.Line - 1].Length);
- }else if (targetColumn < 0)
- currentLoc = new CharLocation (loc.Line - 1, loc.Column);
- else if (targetColumn > lines[loc.Line - 1].Length)
- currentLoc = new CharLocation (loc.Line - 1, lines[loc.Line - 1].Length);
- else
- currentLoc = new CharLocation (loc.Line - 1, targetColumn);
+ int newLine = Math.Min (Math.Max (0, loc.Line + lineDiff), lines.Count - 1);
- return true;
- }
- public bool MoveDown () {
- CharLocation loc = currentLoc.Value;
- if (loc.Line == lines.Count - 1)
+ if (newLine == loc.Line)
return false;
- if (loc.Column > lines[loc.Line + 1].Length) {
+ if (loc.Column > lines[newLine].Length) {
if (targetColumn < 0)
targetColumn = loc.Column;
- currentLoc = new CharLocation (loc.Line + 1, lines[loc.Line + 1].Length);
+ currentLoc = new CharLocation (newLine, lines[newLine].Length);
} else if (targetColumn < 0)
- currentLoc = new CharLocation (loc.Line + 1, loc.Column);
- else if (targetColumn > lines[loc.Line + 1].Length)
- currentLoc = new CharLocation (loc.Line + 1, lines[loc.Line + 1].Length);
+ currentLoc = new CharLocation (newLine, loc.Column);
+ else if (targetColumn > lines[newLine].Length)
+ currentLoc = new CharLocation (newLine, lines[newLine].Length);
else
- currentLoc = new CharLocation (loc.Line + 1, targetColumn);
+ currentLoc = new CharLocation (newLine, targetColumn);
return true;
- }
-
+ }
+ protected int visibleLines => (int)((double)ClientRectangle.Height / (fe.Ascent + fe.Descent));
public void GotoWordStart(){
int pos = lines.GetAbsolutePosition (currentLoc.Value);
//skip white spaces
}
}
public bool SelectionIsEmpty => selectionStart.HasValue ? Selection.IsEmpty : true;
- public override bool UpdateLayout (LayoutingType layoutType) {
- if ((LayoutingType.Sizing | layoutType) != LayoutingType.None) {
- if (!System.Threading.Monitor.TryEnter (linesMutex))
- return false;
- }
- bool result = base.UpdateLayout (layoutType);
- System.Threading.Monitor.Exit (linesMutex);
- return result;
- }
+
protected virtual void measureTextBounds (Context gr) {
fe = gr.FontExtents;
te = new TextExtents ();
cachedTextSize.Width = lines[longestLine].LengthInPixel;
textMeasureIsUpToDate = true;
}
- #region GraphicObject overrides
- public override int measureRawSize(LayoutingType lt)
- {
- if ((bool)lines?.IsEmpty)
- getLines ();
-
- if (!textMeasureIsUpToDate) {
- using (Context gr = new Context (IFace.surf)) {
- //Cairo.FontFace cf = gr.GetContextFontFace ();
-
- gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
- gr.SetFontSize (Font.Size);
- gr.FontOptions = Interface.FontRenderingOptions;
- gr.Antialias = Interface.Antialias;
-
- measureTextBounds (gr);
- }
- }
- return Margin * 2 + (lt == LayoutingType.Height ? cachedTextSize.Height : cachedTextSize.Width);
- }
-
protected virtual void drawContent (Context gr) {
Rectangle cb = ClientRectangle;
fe = gr.FontExtents;
(int)Math.Min (Math.Max (0, Math.Floor (mouseLocalPos.Y / (fe.Ascent + fe.Descent))), lines.Count - 1) : 0;
hoverLoc = new CharLocation (hoverLine, -1, mouseLocalPos.X);
}
+ protected virtual bool cancelLinePrint (int lineHeght, int y, int clientHeight) => false;
+ RectangleD? textCursor = null;
+ internal virtual RectangleD? computeTextCursor (Rectangle cursor) {
+ Rectangle cb = ClientRectangle;
+ if (cursor.X > cb.Width && cursor.Y > cb.Height)
+ return null;
+ return cursor;
+ }
+ internal virtual bool DrawCursor (Context ctx, out Rectangle rect) {
+ if (!currentLoc.Value.HasVisualX) {
+ ctx.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
+ ctx.SetFontSize (Font.Size);
+ ctx.FontOptions = Interface.FontRenderingOptions;
+ ctx.Antialias = Interface.Antialias;
+ lock (linesMutex)
+ updateLocation (ctx, ClientRectangle.Width, ref currentLoc);
+ textCursor = null;
+ }
+
+
+ int lineHeight = (int)(fe.Ascent + fe.Descent);
+ textCursor = computeTextCursor (new RectangleD (currentLoc.Value.VisualCharXPosition, currentLoc.Value.Line * lineHeight, 1.0, lineHeight));
+
+ if (textCursor == null) {
+ rect = default;
+ return false;
+ }
+ //}
+ Rectangle c = ScreenCoordinates (textCursor.Value + Slot.Position + ClientRectangle.Position);
+ ctx.ResetClip ();
+ ctx.SetSource (cursorColor);
+ ctx.LineWidth = 1.0;
+ ctx.MoveTo (0.5 + c.X, c.Y);
+ ctx.LineTo (0.5 + c.X, c.Bottom);
+ ctx.Stroke ();
+ rect = c;
+ return true;
+ }
+
+ void updateLocation (Context gr, int clientWidth, ref CharLocation? location) {
+ if (location == null)
+ return;
+ CharLocation loc = location.Value;
+ //Console.WriteLine ($"updateLocation: {loc} text:{_text.Length}");
+ if (loc.HasVisualX)
+ return;
+ TextLine ls = lines[loc.Line];
+ ReadOnlySpan<char> curLine = _text.GetLine (ls);
+ double cPos = Width.IsFit && !Multiline ? 0 : getX (clientWidth, ls);
+
+ if (loc.Column >= 0) {
+ //int encodedBytes = Crow.Text.Encoding2.ToUtf8 (curLine.Slice (0, loc.Column), bytes);
+ loc.VisualCharXPosition = gr.TextExtents (curLine.Slice (0, loc.Column), Interface.TAB_SIZE).XAdvance + cPos;
+ location = loc;
+ return;
+ }
+
+ TextExtents te;
+ Span<byte> bytes = stackalloc byte[5];//utf8 single char buffer + '\0'
+
+ for (int i = 0; i < ls.Length; i++) {
+ int encodedBytes = Crow.Text.Encoding.ToUtf8 (curLine.Slice (i, 1), bytes);
+ bytes[encodedBytes] = 0;
+
+ gr.TextExtents (bytes, out te);
+ double halfWidth = te.XAdvance / 2;
+
+ if (loc.VisualCharXPosition <= cPos + halfWidth) {
+ loc.Column = i;
+ loc.VisualCharXPosition = cPos;
+ location = loc;
+ return;
+ }
+
+ cPos += te.XAdvance;
+ }
+ loc.Column = ls.Length;
+ loc.VisualCharXPosition = cPos;
+ location = loc;
+ }
+ double getX (int clientWidth, TextLine ls) {
+ switch (TextAlignment) {
+ case TextAlignment.Right:
+ return clientWidth - ls.LengthInPixel;
+ case TextAlignment.Center:
+ return clientWidth / 2 - ls.LengthInPixel / 2;
+ }
+ return 0;
+ }
+ protected void checkShift () {
+ if (IFace.Shift) {
+ if (!selectionStart.HasValue)
+ selectionStart = currentLoc;
+ } else
+ selectionStart = null;
+ }
+
+ #region GraphicObject overrides
+ public override bool UpdateLayout (LayoutingType layoutType) {
+ if ((LayoutingType.Sizing | layoutType) != LayoutingType.None) {
+ if (!System.Threading.Monitor.TryEnter (linesMutex))
+ return false;
+ }
+ bool result = base.UpdateLayout (layoutType);
+ System.Threading.Monitor.Exit (linesMutex);
+ return result;
+ }
+ public override int measureRawSize(LayoutingType lt)
+ {
+ if ((bool)lines?.IsEmpty)
+ getLines ();
+
+ if (!textMeasureIsUpToDate) {
+ using (Context gr = new Context (IFace.surf)) {
+ //Cairo.FontFace cf = gr.GetContextFontFace ();
+
+ gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
+ gr.SetFontSize (Font.Size);
+ gr.FontOptions = Interface.FontRenderingOptions;
+ gr.Antialias = Interface.Antialias;
+ measureTextBounds (gr);
+ }
+ }
+ return Margin * 2 + (lt == LayoutingType.Height ? cachedTextSize.Height : cachedTextSize.Width);
+ }
+
protected override void onDraw (Context gr)
{
base.onDraw (gr);
currentLoc = hoverLoc;
RegisterForRedraw ();
}
- }
-
+ }
public override void onMouseDown (object sender, MouseButtonEventArgs e)
{
if (e.Button == Glfw.MouseButton.Left) {
RegisterForRedraw ();
break;
case Key.Home:
+ targetColumn = -1;
checkShift ();
if (IFace.Ctrl)
currentLoc = new CharLocation (0, 0);
break;
case Key.Up:
checkShift ();
- MoveUp ();
+ LineMove (-1);
RegisterForRedraw ();
break;
case Key.Down:
checkShift ();
- MoveDown ();
+ LineMove (1);
RegisterForRedraw ();
- break;
+ break;
default:
base.onKeyDown (sender, e);
return;
IFace.forceTextCursor = true;
e.Handled = true;
}
- void checkShift () {
- if (IFace.Shift) {
- if (!selectionStart.HasValue)
- selectionStart = currentLoc;
- } else
- selectionStart = null;
- }
-
- protected virtual bool cancelLinePrint (int lineHeght, int y, int clientHeight) => false;
-
#endregion
- /// <summary>
- /// location column from
- /// </summary>
- void updateLocation (Context gr, int clientWidth, ref CharLocation? location)
- {
- if (location == null)
- return;
- CharLocation loc = location.Value;
- //Console.WriteLine ($"updateLocation: {loc} text:{_text.Length}");
- if (loc.HasVisualX)
- return;
- TextLine ls = lines[loc.Line];
- ReadOnlySpan<char> curLine = _text.GetLine (ls);
- double cPos = Width.IsFit && !Multiline ? 0 : getX (clientWidth, ls);
-
- if (loc.Column >= 0) {
- //int encodedBytes = Crow.Text.Encoding2.ToUtf8 (curLine.Slice (0, loc.Column), bytes);
- loc.VisualCharXPosition = gr.TextExtents (curLine.Slice (0, loc.Column), Interface.TAB_SIZE).XAdvance + cPos;
- location = loc;
- return;
- }
-
- TextExtents te;
- Span<byte> bytes = stackalloc byte[5];//utf8 single char buffer + '\0'
-
- for (int i = 0; i < ls.Length; i++)
- {
- int encodedBytes = Crow.Text.Encoding.ToUtf8 (curLine.Slice (i, 1), bytes);
- bytes[encodedBytes] = 0;
-
- gr.TextExtents (bytes, out te);
- double halfWidth = te.XAdvance / 2;
-
- if (loc.VisualCharXPosition <= cPos + halfWidth)
- {
- loc.Column = i;
- loc.VisualCharXPosition = cPos;
- location = loc;
- return;
- }
-
- cPos += te.XAdvance;
- }
- loc.Column = ls.Length;
- loc.VisualCharXPosition = cPos;
- location = loc;
- }
- double getX (int clientWidth, TextLine ls) {
- switch (TextAlignment) {
- case TextAlignment.Right:
- return clientWidth - ls.LengthInPixel;
- case TextAlignment.Center:
- return clientWidth / 2 - ls.LengthInPixel / 2;
- }
- return 0;
- }
- RectangleD? textCursor = null;
- internal virtual RectangleD? computeTextCursor (Rectangle cursor) {
- Rectangle cb = ClientRectangle ;
- if (cursor.X > cb.Width && cursor.Y > cb.Height)
- return null;
- return cursor;
- }
- internal virtual bool DrawCursor (Context ctx, out Rectangle rect) {
- if (!currentLoc.Value.HasVisualX) {
- ctx.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
- ctx.SetFontSize (Font.Size);
- ctx.FontOptions = Interface.FontRenderingOptions;
- ctx.Antialias = Interface.Antialias;
- lock(linesMutex)
- updateLocation (ctx, ClientRectangle.Width, ref currentLoc);
- textCursor = null;
- }
-
-
- int lineHeight = (int)(fe.Ascent + fe.Descent);
- textCursor = computeTextCursor (new RectangleD (currentLoc.Value.VisualCharXPosition, currentLoc.Value.Line * lineHeight, 1.0, lineHeight));
-
- if (textCursor == null) {
- rect = default;
- return false;
- }
- //}
- Rectangle c = ScreenCoordinates (textCursor.Value + Slot.Position + ClientRectangle.Position);
- ctx.ResetClip ();
- ctx.SetSource (cursorColor);
- ctx.LineWidth = 1.0;
- ctx.MoveTo (0.5 + c.X, c.Y);
- ctx.LineTo (0.5 + c.X, c.Bottom);
- ctx.Stroke ();
- rect = c;
- return true;
- }
}
}
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