[Example] How to replace text in selection
Posted: Mon Oct 05, 2020 3:48 pm
This example shows how to replace all occurrences of SFrom to STo only in the selected fragment.
This operation is undoable.
This operation is undoable.
Code: Select all
uses RVLinear;
procedure ReplaceInSelection(rve: TCustomRichViewEdit; const SFrom, STo: String);
var
SelStart, SelLength, EndPos, LenDif: Integer;
begin
rve := rve.TopLevelEditor;
RVGetSelection(rve, SelStart, SelLength);
if SelLength < Length(SFrom) then
exit;
EndPos := SelStart + SelLength;
LenDif := Length(STo) - Length(SFrom);
rve.BeginUpdate;
rve.BeginUndoGroup(rvutModifyItem);
rve.SetUndoGroupMode(True);
try
RVSetSelection(rve, SelStart, 0);
while rve.SearchText(SFrom, [rvseoDown, rvseoMultiItem]) and
(RVGetLinearCaretPos(rve) <= EndPos) do
begin
rve.InsertText(STo);
inc(EndPos, LenDif);
end;
finally
rve.SetUndoGroupMode(False);
rve.EndUpdate;
end;
RVSetSelection(rve, SelStart, EndPos - SelStart);
end;