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{-------------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
the specific language governing rights and limitations under the License.
Alternatively, the contents of this file may be used under the terms of the
GNU General Public License Version 2 or later (the "GPL"), in which case
the provisions of the GPL are applicable instead of those above.
If you wish to allow use of your version of this file only under the terms
of the GPL and not to allow others to use your version of this file
under the MPL, indicate your decision by deleting the provisions above and
replace them with the notice and other provisions required by the GPL.
If you do not delete the provisions above, a recipient may use your version
of this file under either the MPL or the GPL.
-------------------------------------------------------------------------------}
unit SynEditMarkupSpecialLine;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Graphics, SynEditMarkup, SynEditMiscClasses, Controls, LCLProc;
type
TSpecialLineMarkupEvent = procedure(Sender: TObject; Line: integer;
var Special: boolean; Markup: TSynSelectedColor) of object;
TSpecialLineColorsEvent = procedure(Sender: TObject; Line: integer;
var Special: boolean; var FG, BG: TColor) of object;
{ TSynEditMarkupSpecialLine }
TSynEditMarkupSpecialLine = class(TSynEditMarkup)
private
FMarkupLineHighlightInfo: TSynSelectedColor;
FOnSpecialLineColors: TSpecialLineColorsEvent;
FOnSpecialLineMarkup: TSpecialLineMarkupEvent;
FSpecialLine : Boolean;
FHighlightedLine: Integer;
protected
procedure DoMarkupLineHighlightInfoChange(Sender: TObject);
function HasLineHighlight: Boolean;
procedure DoCaretChanged(Sender: TObject); override;
procedure DoTopLineChanged(OldTopLine : Integer); override;
procedure DoLinesInWindoChanged(OldLinesInWindow : Integer); override;
procedure DoTextChanged(StartLine, EndLine, ACountDiff: Integer); override;
procedure DoMarkupChanged(AMarkup: TSynSelectedColor); override;
procedure DoEnabledChanged(Sender: TObject); override;
public
constructor Create(ASynEdit: TSynEditBase);
destructor Destroy; override;
procedure PrepareMarkupForRow(ARow: Integer); override;
function GetMarkupAttributeAtRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound;
const AnRtlInfo: TLazSynDisplayRtlInfo): TSynSelectedColor; override;
procedure GetNextMarkupColAfterRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound;
const AnRtlInfo: TLazSynDisplayRtlInfo;
out ANextPhys, ANextLog: Integer); override;
function RealEnabled: Boolean; override;
procedure InvalidateLineHighlight;
property MarkupLineHighlightInfo: TSynSelectedColor read FMarkupLineHighlightInfo;
property OnSpecialLineColors: TSpecialLineColorsEvent
read FOnSpecialLineColors write FOnSpecialLineColors;
property OnSpecialLineMarkup: TSpecialLineMarkupEvent
read FOnSpecialLineMarkup write FOnSpecialLineMarkup;
end;
implementation
{ TSynEditMarkupBracket }
procedure TSynEditMarkupSpecialLine.DoMarkupLineHighlightInfoChange(
Sender: TObject);
begin
if FHighlightedLine > 0 then
InvalidateSynLines(FHighlightedLine, FHighlightedLine)
else
InvalidateLineHighlight;
end;
function TSynEditMarkupSpecialLine.HasLineHighlight: Boolean;
begin
Result :=
(FMarkupLineHighlightInfo.Background <> clNone) or
(FMarkupLineHighlightInfo.Foreground <> clNone);
end;
procedure TSynEditMarkupSpecialLine.DoCaretChanged(Sender: TObject);
begin
InvalidateLineHighlight;
end;
procedure TSynEditMarkupSpecialLine.DoTopLineChanged(OldTopLine: Integer);
begin
InvalidateLineHighlight;
end;
procedure TSynEditMarkupSpecialLine.DoLinesInWindoChanged(OldLinesInWindow: Integer);
begin
InvalidateLineHighlight;
end;
procedure TSynEditMarkupSpecialLine.DoTextChanged(StartLine, EndLine,
ACountDiff: Integer);
begin
InvalidateLineHighlight;
end;
procedure TSynEditMarkupSpecialLine.DoMarkupChanged(AMarkup: TSynSelectedColor);
begin
InvalidateLineHighlight;
end;
procedure TSynEditMarkupSpecialLine.DoEnabledChanged(Sender: TObject);
begin
InvalidateLineHighlight;
end;
function TSynEditMarkupSpecialLine.RealEnabled: Boolean;
begin
Result := Enabled and (not IsTempDisabled) and
(Assigned(FOnSpecialLineMarkup) or Assigned(FOnSpecialLineColors) or
HasLineHighlight
);
end;
constructor TSynEditMarkupSpecialLine.Create(ASynEdit: TSynEditBase);
begin
inherited Create(ASynEdit);
FHighlightedLine := -1;
FMarkupLineHighlightInfo := TSynSelectedColor.Create;
FMarkupLineHighlightInfo.Background := clNone;
FMarkupLineHighlightInfo.Foreground := clNone;
FMarkupLineHighlightInfo.OnChange := @DoMarkupLineHighlightInfoChange;
MarkupInfo.Style := [];
MarkupInfo.StyleMask := [];
end;
destructor TSynEditMarkupSpecialLine.Destroy;
begin
FMarkupLineHighlightInfo.Free;
inherited Destroy;
end;
procedure TSynEditMarkupSpecialLine.PrepareMarkupForRow(ARow: Integer);
var
colFg, colBg: TColor;
begin
FSpecialLine := False;
if Assigned(FOnSpecialLineMarkup) then
FOnSpecialLineMarkup(SynEdit, ARow, FSpecialLine, MarkupInfo);
if Assigned(FOnSpecialLineColors) then
begin
if FSpecialLine then
begin
colFg := MarkupInfo.Foreground;
colBg := MarkupInfo.Background;
end else
begin
colFg := clNone;
colBg := clNone;
end;
FOnSpecialLineColors(SynEdit, ARow, FSpecialLine, colFg, colBg);
MarkupInfo.Foreground := colFg;
MarkupInfo.Background := colBg;
end;
// if line is not special then check whether it is a current line
// if it is so then use own bg,fg colors to setup highlight
if not FSpecialLine then
begin
if (FHighlightedLine = ARow) and HasLineHighlight then
begin
FSpecialLine := True;
MarkupInfo.Assign(FMarkupLineHighlightInfo);
end;
end;
end;
function TSynEditMarkupSpecialLine.GetMarkupAttributeAtRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound; const AnRtlInfo: TLazSynDisplayRtlInfo): TSynSelectedColor;
begin
Result := nil;
MarkupInfo.SetFrameBoundsPhys(1, MaxInt);
if FSpecialLine then
Result := MarkupInfo;
end;
procedure TSynEditMarkupSpecialLine.GetNextMarkupColAfterRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound; const AnRtlInfo: TLazSynDisplayRtlInfo; out ANextPhys,
ANextLog: Integer);
begin
ANextLog := -1;
ANextPhys := -1; // always valid for the whole line
end;
procedure TSynEditMarkupSpecialLine.InvalidateLineHighlight;
var
NewLine: Integer;
begin
if (not HasLineHighlight) or (Caret = nil) then
Exit;
NewLine := Caret.LinePos;
// invalidate old line highlighting, if changed
if (FHighlightedLine > 0) and (NewLine <> FHighlightedLine) then
InvalidateSynLines(FHighlightedLine, FHighlightedLine);
// invalidate new line highlighting, if changed
if (NewLine > 0) and (NewLine <> FHighlightedLine) then
InvalidateSynLines(NewLine, NewLine);
FHighlightedLine := NewLine;
end;
end.
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