void HandleSelectionChanged_OnExpandSel(IGraphics g, SelectionChangedEventArgs e, int caretLine, int caretColumn)
{
Document doc = this.Document;
int begin, beginL;
int end, endL;
int beginLineHead, endLineHead;
// if anchor was moved, invalidate largest range made with four indexes
if (e.OldAnchor != doc.AnchorIndex)
{
begin = Utl.Min(e.OldAnchor, e.OldCaret, doc.AnchorIndex, doc.CaretIndex);
end = Utl.Max(e.OldAnchor, e.OldCaret, doc.AnchorIndex, doc.CaretIndex);
Invalidate(begin, end);
return;
}
// get range between old caret and current caret
if (e.OldCaret < doc.CaretIndex)
{
begin = e.OldCaret;
beginL = doc.ViewParam.PrevCaretLine;
end = doc.CaretIndex;
endL = caretLine;
}
else
{
begin = doc.CaretIndex;
beginL = caretLine;
end = e.OldCaret;
endL = doc.ViewParam.PrevCaretLine;
}
beginLineHead = GetLineHeadIndex(beginL);
endLineHead = GetLineHeadIndex(endL); // if old caret is the end pos and if the pos exceeds current text length, this will fail.
// invalidate
Invalidate_MultiLines(g, begin, end, beginL, endL, beginLineHead, endLineHead);
}
void HandleSelectionChanged_OnExpandSelInLine(IGraphics g, SelectionChangedEventArgs e,
int begin, int end, int beginL)
{
DebugUtl.Assert(beginL < LineCount);
Debug.Assert(TextUtil.IsDividableIndex(Document.InternalBuffer, begin));
Debug.Assert(TextUtil.IsDividableIndex(Document.InternalBuffer, end));
var doc = Document;
var rect = new Rectangle();
// if anchor was moved, invalidate largest range made with four indexes
if (e.OldAnchor != doc.AnchorIndex)
{
begin = Utl.Min(e.OldAnchor, e.OldCaret, doc.AnchorIndex, doc.CaretIndex);
end = Utl.Max(e.OldAnchor, e.OldCaret, doc.AnchorIndex, doc.CaretIndex);
Invalidate(begin, end);
return;
}
// calculate location of invalid rectangle
var beginLineHead = GetLineHeadIndex(beginL);
if (beginLineHead < begin)
{
rect.X = MeasureTokenEndX(g, new TextSegment(beginLineHead, begin), 0);
}
rect.Y = YofLine(beginL);
// calculate width of invalid rectangle
rect.Width = MeasureTokenEndX(g, new TextSegment(beginLineHead, end), 0) - rect.X;
rect.Height = LineSpacing;
// invalidate
rect.X -= (ScrollPosX - XofTextArea);
Invalidate(rect);
}
void HandleSelectionChanged_OnExpandSelInLine(IGraphics g, SelectionChangedEventArgs e, int begin, int end, int beginL)
{
DebugUtl.Assert(beginL < LineCount);
Document doc = Document;
Rectangle rect = new Rectangle();
int beginLineHead;
string token = String.Empty;
// if anchor was moved, invalidate largest range made with four indexes
if (e.OldAnchor != doc.AnchorIndex)
{
begin = Utl.Min(e.OldAnchor, e.OldCaret, doc.AnchorIndex, doc.CaretIndex);
end = Utl.Max(e.OldAnchor, e.OldCaret, doc.AnchorIndex, doc.CaretIndex);
Invalidate(begin, end);
return;
}
// get chars at left of invalid rect
beginLineHead = GetLineHeadIndex(beginL);
if (beginLineHead < begin)
{
token = Document.GetTextInRangeRef(ref beginLineHead, ref begin);
}
// calculate invalid rect
rect.X = MeasureTokenEndX(g, token, 0);
rect.Y = YofLine(beginL);
token = Document.GetTextInRangeRef(ref beginLineHead, ref end);
rect.Width = MeasureTokenEndX(g, token, 0) - rect.X;
rect.Height = LineSpacing;
// invalidate
rect.X -= (ScrollPosX - XofTextArea);
Invalidate(rect);
}
