public Painter(TextView outer, Graphics g, StyleStack styleStack)
{
this.outer = outer;
this.graphics = g;
this.styleStack = styleStack;
selStart = outer.GetStartSelection();
selEnd = outer.GetEndSelection();
}
public bool DrawNode(Node node, object graphics)
{
Graphics g = (Graphics)graphics;
var m = g.Transform;
var saveM = g.Transform.Clone();
// g.SetClip(FillTheGraphicsPath(node.GeometryNode.BoundaryCurve));
// This is supposed to flip the text around its center
var c = (float)node.GeometryNode.Center.Y;
using (var m2 = new System.Drawing.Drawing2D.Matrix(1, 0, 0, -1, 0, 2 * c))
{
m.Multiply(m2);
}
m.Translate(
(float)node.GeometryNode.Center.X,
(float)node.GeometryNode.Center.Y);
g.Transform = m;
var styleStack = GetStyleStack();
var painter = new TextViewPainter(
Layout, g,
SystemColors.WindowText,
SystemColors.Window,
SystemFonts.DefaultFont, styleStack);
var ptr = new TextPointer { Character = 0, Span = 0, Line = TextModel.StartPosition };
painter.SetSelection(ptr, ptr);
painter.PaintGdiPlus();
g.Transform = saveM;
g.ResetClip();
saveM.Dispose();
// m.Dispose();
return true;//returning false would enable the default rendering
}
private RectangleF CharPositionToClient(Graphics g, TextPointer pos, LayoutSpan span, StyleStack styleStack)
{
var iChar = pos.Character;
styleStack.PushStyle(span.Style);
var font = styleStack.GetFont(defaultFont);
var textStub = span.Text.Substring(0, iChar);
var sz = MeasureText(g, textStub, font);
var x = sz.Width + span.ContentExtent.Left;
var width = 1;
styleStack.PopStyle();
return new RectangleF(x, span.ContentExtent.Top, width, span.ContentExtent.Height);
}
private RectangleF SpanPositionToClient(Graphics g, TextPointer pos, LayoutLine line, StyleStack styleStack)
{
var iSpan = pos.Span;
if (iSpan < 0 || iSpan >= line.Spans.Length)
return line.Extent;
var span = line.Spans[iSpan];
return CharPositionToClient(g, pos, span, styleStack);
}
public RectangleF LogicalPositionToClient(Graphics g, TextPointer pos, StyleStack styleStack)
{
foreach (var line in this.visibleLines.Values)
{
if (line.Position == pos.Line)
{
return SpanPositionToClient(g, pos, line, styleStack);
}
}
return new RectangleF(new PointF(0, 0), CalculateExtent());
}
internal bool IsInsideSelection(TextPointer pos)
{
return
(layout.ComparePositions(GetStartSelection(), pos) <= 0 &&
layout.ComparePositions(pos, GetEndSelection()) < 0);
}
internal bool IsInsideSelection(TextPointer pos)
{
return
ComparePositions(GetStartSelection(), pos) <= 0 &&
ComparePositions(pos, GetEndSelection()) < 0;
}
protected override void OnMouseUp(MouseEventArgs e)
{
if (Capture)
{
var pos = ClientToLogicalPosition(e.Location);
if (dragging)
{
cursorPos = anchorPos = pos;
var span = GetSpan(e.Location);
if (span != null && span.Tag != null)
{
Navigate.Fire(this, new EditorNavigationArgs(span.Tag));
}
Invalidate();
}
else
{
if (IsSelectionEmpty())
{
var span = GetSpan(e.Location);
if (span != null && span.Tag != null)
{
Navigate.Fire(this, new EditorNavigationArgs(span.Tag));
}
}
SelectionChanged.Fire(this);
}
Capture = false;
}
base.OnMouseUp(e);
}
protected override void OnMouseDown(MouseEventArgs e)
{
Capture = true;
var pos = ClientToLogicalPosition(e.Location);
if (!IsSelectionEmpty() &&
IsInsideSelection(pos))
{
// if down-click is done on a selection, the user may want
// to drag it.
dragging = true;
}
else if (ComparePositions(pos, cursorPos) != 0)
{
Focus();
// User clicked somewhere other than the current cursor
// position, so we need to move it.
dragging = false;
this.cursorPos = pos;
if ((Control.ModifierKeys & Keys.Shift) == 0)
this.anchorPos = pos;
SetCaret();
Invalidate();
}
base.OnMouseDown(e);
}
public void SetSelection(TextPointer start, TextPointer end)
{
this.selStart = start;
this.selEnd = end;
}
protected virtual void OnModelChanged(EventArgs e)
{
this.cursorPos = new TextPointer
{
Line = model.CurrentPosition,
Span = 0,
Character = 0
};
this.anchorPos = cursorPos;
ChangeLayout();
UpdateScrollbar();
ModelChanged.Fire(this);
}
private RectangleF LogicalPositionToClient(TextPointer pos)
{
using (var g = CreateGraphics())
{
GetStyleStack().PushStyle(StyleClass);
var ptr = layout.LogicalPositionToClient(g, pos, styleStack);
styleStack.PopStyle();
return ptr;
}
}
public void ClearSelection()
{
anchorPos = cursorPos;
Invalidate();
}
public void ClearSelection()
{
anchorPos = cursorPos;
Invalidate();
}
protected override void OnMouseDown(MouseEventArgs e)
{
Capture = true;
var pos = ClientToLogicalPosition(e.Location);
if (!IsSelectionEmpty() &&
IsInsideSelection(pos))
{
dragging = true;
}
else if (ComparePositions(pos, cursorPos) != 0)
{
dragging = false;
this.cursorPos = pos;
if ((Control.ModifierKeys & Keys.Shift) == 0)
this.anchorPos = pos;
Focus();
SetCaret();
Invalidate();
}
base.OnMouseDown(e);
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (Capture && !dragging)
{
var pos = ClientToLogicalPosition(e.Location);
if (ComparePositions(cursorPos, pos) != 0)
{
this.cursorPos = pos;
Invalidate();
}
}
else
{
var span = GetSpan(e.Location);
if (span != null)
{
this.Cursor = GetCursor(span.Style);
}
else
{
this.Cursor = Cursors.Default;
}
}
base.OnMouseMove(e);
}
private void PaintLine(LayoutLine line)
{
// Paint the last piece of the line
RectangleF rcTrailer = line.Extent;
float xMax = 0;
if (line.Spans.Length > 0)
{
xMax = line.Spans[line.Spans.Length - 1].Extent.Right;
}
var cx = outer.ClientRectangle.Right - xMax;
if (cx > 0)
{
rcTrailer.X = xMax;
rcTrailer.Width = cx;
graphics.FillRectangle(
styleStack.GetBackground(outer),
rcTrailer);
}
for (int iSpan = 0; iSpan < line.Spans.Length; ++iSpan)
{
this.span = line.Spans[iSpan];
this.styleStack.PushStyle(span.Style);
var pos = new TextPointer { Line = line.Position, Span = iSpan, Character = 0 };
var insideSelection =
outer.ComparePositions(selStart, pos) <= 0 &&
outer.ComparePositions(pos, selEnd) < 0;
this.fg = styleStack.GetForegroundColor(outer);
this.bg = styleStack.GetBackground(outer);
this.font = styleStack.GetFont(outer);
this.rcText = span.Extent;
if (!insideSelection)
{
if (selStart.Line == line.Position && selStart.Span == iSpan)
{
// Selection starts inside the current span. Write
// any unselected text first.
if (selStart.Character > 0)
{
DrawTextSegment(0, selStart.Character, false);
}
if (selEnd.Line == line.Position && selEnd.Span == iSpan)
{
// Selection ends inside the current span. Write
// selected text.
DrawTextSegment(selStart.Character, selEnd.Character - selStart.Character, true);
DrawTrailingTextSegment(selEnd.Character, false);
}
else
{
// Select all the way to the end of the span.
DrawTrailingTextSegment(selStart.Character, true);
}
}
else
{
// Not in selection at all.
DrawText(span.Text, false);
}
}
else
{
// Inside selection. Does it end?
if (selEnd.Line == line.Position && selEnd.Span == iSpan)
{
// Selection ends inside the current span. Write
// selected text.
DrawTextSegment(0, selEnd.Character, true);
DrawTrailingTextSegment(selEnd.Character, false);
}
else
{
DrawText(span.Text, true);
}
}
#if DEBUG
var text = span.Text;
if (line.Position == selStart.Line &&
iSpan == selStart.Span)
{
var textFrag = text.Substring(0, selStart.Character);
var sz = outer.MeasureText(graphics, textFrag, font);
graphics.FillRectangle(
Brushes.Red,
span.Extent.Left + sz.Width, line.Extent.Top,
1, line.Extent.Height);
}
if (line.Position == selEnd.Line &&
iSpan == selEnd.Span)
{
var textFrag = text.Substring(0, selEnd.Character);
var sz = outer.MeasureText(graphics, textFrag, font);
graphics.FillRectangle(
Brushes.Blue,
span.Extent.Left + sz.Width, line.Extent.Top,
1, line.Extent.Height);
}
#endif
styleStack.PopStyle();
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (Capture && !dragging)
{
// We're extending the selection
var pos = ClientToLogicalPosition(e.Location);
if (ComparePositions(cursorPos, pos) != 0)
{
this.cursorPos = pos;
Invalidate();
}
}
else
{
// Not captured, so rat is just floating over us.
// Show the right cursor.
var span = GetSpan(e.Location);
if (span != null)
{
GetStyleStack().PushStyle(StyleClass);
styleStack.PushStyle(span.Style);
this.Cursor = styleStack.GetCursor(this);
styleStack.PopStyle();
styleStack.PopStyle();
}
else
{
this.Cursor = Cursors.Default;
}
}
base.OnMouseMove(e);
}
public Painter(TextView outer, Graphics g)
{
this.outer = outer;
this.graphics = g;
selStart = outer.GetStartSelection();
selEnd = outer.GetEndSelection();
}
private int ComparePositions(TextPointer a, TextPointer b)
{
var d = model.ComparePositions(a.Line, b.Line);
if (d != 0)
return d;
d = a.Span.CompareTo(b.Span);
if (d != 0)
return d;
return a.Character.CompareTo(b.Character);
}
private void PaintLine(LayoutLine line)
{
for (int iSpan = 0; iSpan < line.Spans.Length; ++iSpan)
{
this.span = line.Spans[iSpan];
var pos = new TextPointer { Line = line.Position, Span = iSpan, Character = 0 };
var insideSelection =
outer.ComparePositions(selStart, pos) <= 0 &&
outer.ComparePositions(pos, selEnd) < 0;
this.fg = outer.GetForegroundColor(span.Style);
this.bg = outer.GetBackground(span.Style);
this.font = outer.GetFont(span.Style);
this.rcText = span.Extent;
if (!insideSelection)
{
if (selStart.Line == line.Position && selStart.Span == iSpan)
{
// Selection starts inside the current span. Write
// any unselected text first.
if (selStart.Character > 0)
{
DrawTextSegment(0, selStart.Character, false);
}
if (selEnd.Line == line.Position && selEnd.Span == iSpan)
{
// Selection ends inside the current span. Write
// selected text.
DrawTextSegment(selStart.Character, selEnd.Character - selStart.Character, true);
if (selEnd.Character < span.Text.Length)
{
// If there is trailing unselected text, display that.
DrawTrailingTextSegment(selEnd.Character, false);
}
}
else
{
// Select all the way to the end of the span.
DrawTrailingTextSegment(selStart.Character, true);
}
}
else
{
// Not in selection at all.
DrawText(span.Text, false);
}
}
else
{
// Inside selection. Does it end?
if (selEnd.Line == line.Position && selEnd.Span == iSpan)
{
// Selection ends inside the current span. Write
// selected text.
DrawTextSegment(0, selEnd.Character, true);
DrawTrailingTextSegment(selEnd.Character, false);
}
else
{
DrawText(span.Text, true);
}
}
#if DEBUG
var text = span.Text;
if (line.Position == selStart.Line &&
iSpan == selStart.Span)
{
var textFrag = text.Substring(0, selStart.Character);
var sz = outer.MeasureText(graphics, textFrag, font);
graphics.FillRectangle(
Brushes.Red,
span.Extent.Left + sz.Width, line.Extent.Top,
1, line.Extent.Height);
}
if (line.Position == selEnd.Line &&
iSpan == selEnd.Span)
{
var textFrag = text.Substring(0, selEnd.Character);
var sz = outer.MeasureText(graphics, textFrag, font);
graphics.FillRectangle(
Brushes.Blue,
span.Extent.Left + sz.Width, line.Extent.Top,
1, line.Extent.Height);
}
#endif
}
}
protected virtual void OnModelChanged(EventArgs e)
{
this.cursorPos = new TextPointer
{
Line = model.StartPosition,
Span = 0,
Character = 0
};
this.anchorPos = cursorPos;
vScroll.Value = 0;
ChangeLayout();
ModelChanged.Fire(this);
}
private void PaintLine(LayoutLine line)
{
for (int iSpan = 0; iSpan < line.Spans.Length; ++iSpan)
{
this.span = line.Spans[iSpan];
var pos = new TextPointer {
Line = line.Position, Span = iSpan, Character = 0
};
var insideSelection =
outer.ComparePositions(selStart, pos) <= 0 &&
outer.ComparePositions(pos, selEnd) < 0;
this.fg = outer.GetForegroundColor(span.Style);
this.bg = outer.GetBackground(span.Style);
this.font = outer.GetFont(span.Style);
this.rcText = span.Extent;
if (!insideSelection)
{
if (selStart.Line == line.Position && selStart.Span == iSpan)
{
// Selection starts inside the current span. Write
// any unselected text first.
if (selStart.Character > 0)
{
DrawTextSegment(0, selStart.Character, false);
}
if (selEnd.Line == line.Position && selEnd.Span == iSpan)
{
// Selection ends inside the current span. Write
// selected text.
DrawTextSegment(selStart.Character, selEnd.Character - selStart.Character, true);
if (selEnd.Character < span.Text.Length)
{
// If there is trailing unselected text, display that.
DrawTrailingTextSegment(selEnd.Character, false);
}
}
else
{
// Select all the way to the end of the span.
DrawTrailingTextSegment(selStart.Character, true);
}
}
else
{
// Not in selection at all.
DrawText(span.Text, false);
}
}
else
{
// Inside selection. Does it end?
if (selEnd.Line == line.Position && selEnd.Span == iSpan)
{
// Selection ends inside the current span. Write
// selected text.
DrawTextSegment(0, selEnd.Character, true);
DrawTrailingTextSegment(selEnd.Character, false);
}
else
{
DrawText(span.Text, true);
}
}
#if DEBUG
var text = span.Text;
if (line.Position == selStart.Line &&
iSpan == selStart.Span)
{
var textFrag = text.Substring(0, selStart.Character);
var sz = outer.MeasureText(graphics, textFrag, font);
graphics.FillRectangle(
Brushes.Red,
span.Extent.Left + sz.Width, line.Extent.Top,
1, line.Extent.Height);
}
if (line.Position == selEnd.Line &&
iSpan == selEnd.Span)
{
var textFrag = text.Substring(0, selEnd.Character);
var sz = outer.MeasureText(graphics, textFrag, font);
graphics.FillRectangle(
Brushes.Blue,
span.Extent.Left + sz.Width, line.Extent.Top,
1, line.Extent.Height);
}
#endif
}
}
