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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.
*
* The Initial Developer of this code is John Hansen.
* Portions created by John Hansen are Copyright (C) 2009 John Hansen.
* All Rights Reserved.
*
*)
unit BricxccSynEdit;
interface
uses
{$IFNDEF FPC}
Windows,
{$ELSE}
Types,
{$ENDIF}
SynEditEx, SynEditTypes;
type
{ TBricxccSynEdit }
TBricxccSynEdit = class(TSynEditEx)
private
protected
{$IFDEF FPC}
function GetWordAtCursor : string;
procedure PrepareIdentChars(var aIdentChars, aWhiteChars: TSynIdentChars);
{$ENDIF}
public
function DelimitedEnd(DelimChars: TSynIdentChars): TPoint;
function DelimitedStart(DelimChars: TSynIdentChars): TPoint;
function DelimitedStartEx(XY: TPoint; DelimChars: TSynIdentChars): TPoint;
function DelimitedEndEx(XY: TPoint; DelimChars: TSynIdentChars): TPoint;
procedure SelectDelimited(const aStartDelim : string = '"'; const AStopDelim: string = '"');
procedure GotoLineNumber(aLine : Integer);
function FindString(const ASearch : string; bIgnoreComments : Boolean; bBackward : Boolean) : TPoint;
function TextAtCursor : string;
function TextWithinDelimiters(DelimChars : TSynIdentChars) : string;
procedure ToggleBookMark(BookMark: Integer);
procedure SetCaretAndSel(const ptCaret, ptBefore, ptAfter: TPoint);
{$IFDEF FPC}
procedure EnsureCursorPosVisibleEx(ForceToMiddle: Boolean);
function WordStart: TPoint; virtual;
function WordStartEx(XY: TPoint): TPoint; virtual;
function WordEnd: TPoint; virtual;
function WordEndEx(XY: TPoint): TPoint; virtual;
property WordAtCursor: string read GetWordAtCursor;
{$ENDIF}
end;
implementation
uses
Classes, SynEditSearch, SynEdit, SynEditMiscProcs, Math;
function TBricxccSynEdit.FindString(const ASearch: string; bIgnoreComments,
bBackward: Boolean): TPoint;
var
ptStart, ptEnd: TPoint; // start and end of the search range
ptCurrent: TPoint; // current search position
n, nInLine, nSearchLen: integer;
fTSearch: TSynEditSearch;
function InValidSearchRange(First, Last: integer): boolean;
begin
Result := TRUE;
case SelectionMode of
smNormal:
if ((ptCurrent.Y = ptStart.Y) and (First < ptStart.X)) or
((ptCurrent.Y = ptEnd.Y) and (Last > ptEnd.X)) then Result := FALSE;
smColumn: //EK 10/16/01
// solves bug in search/replace when smColumn mode active and no selection
Result := (First >= ptStart.X) and (Last <= ptEnd.X) or (ptEnd.X-ptStart.X<1); //jcr 2002-04-13 This needs to be <1 not <2
end;
end;
begin
fTSearch := TSynEditSearch.Create{$IFNDEF FPC}(nil){$ENDIF};
try
Result := Point(0, 0);
// can't search for an empty string
nSearchLen := Length(ASearch);
if nSearchLen = 0 then exit;
// get the text range to search in, ignore the "Search in selection only"
// option if nothing is selected
ptStart := Point(1, 1);
ptEnd.Y := Lines.Count;
ptEnd.X := Length(Lines[ptEnd.Y - 1]) + 1;
if bBackward then ptEnd := CaretXY else ptStart := CaretXY;
if bBackward then ptCurrent := ptEnd else ptCurrent := ptStart;
// initialize the search engine
fTSearch.Sensitive := True;
fTSearch.Whole := False;
fTSearch.Pattern := ASearch;
while (ptCurrent.Y >= ptStart.Y) and (ptCurrent.Y <= ptEnd.Y) do begin
nInLine := fTSearch.FindAll(Lines[ptCurrent.Y - 1]);
if bBackward then n := Pred(fTSearch.ResultCount) else n := 0;
if nInLine > 0 then begin
// Operate on all results in this line.
ptCurrent.X := fTSearch.Results[n];
// Is the search result entirely in the search range?
if InValidSearchRange(ptCurrent.X, ptCurrent.X + nSearchLen) then begin
Result := ptCurrent;
Exit;
end;
end;
// search next / previous line
if bBackward then Dec(ptCurrent.Y) else Inc(ptCurrent.Y);
end;
finally
fTSearch.Free
end;
end;
procedure TBricxccSynEdit.GotoLineNumber(aLine: Integer);
var
p : TPoint;
begin
p := Point(1, aLine);
BlockBegin := p;
BlockEnd := p;
CaretXY := p;
EnsureCursorPosVisibleEx(True);
end;
procedure TBricxccSynEdit.SelectDelimited(const aStartDelim : string = '"'; const AStopDelim: string = '"');
var
ptStart, ptEnd: TPoint; // start and end of the search range
ptCurrent: TPoint; // current search position
nSearchLen, nFound, n: integer;
nInLine: integer;
bFoundFirst : boolean;
fTSearch: TSynEditSearch;
function WithinValidSearchRange(First, Last: integer): boolean;
begin
Result := TRUE;
case SelectionMode of
smNormal:
if ((ptCurrent.Y = ptStart.Y) and (First < ptStart.X)) or
((ptCurrent.Y = ptEnd.Y) and (Last > ptEnd.X)) then Result := FALSE;
smColumn:
Result := (First >= ptStart.X) and (Last <= ptEnd.X) or (ptEnd.X-ptStart.X<2);
end;
end;
begin
// delimiters must be a single character
if Length(AStartDelim) <> 1 then exit;
if Length(AStopDelim) <> 1 then exit;
// search forward from current position
ptStart := CaretXY;
ptEnd.Y := Lines.Count;
ptEnd.X := Length(Lines[ptEnd.Y - 1]) + 1;
ptCurrent := ptStart;
// initialize the search engine to find the starting delimiter
fTSearch := TSynEditSearch.Create{$IFNDEF FPC}(nil){$ENDIF};
try
fTSearch.Sensitive := true;
fTSearch.Whole := false;
fTSearch.Pattern := AStartDelim;
nSearchLen := Length(AStartDelim);
bFoundFirst := False;
while (ptCurrent.Y >= ptStart.Y) and (ptCurrent.Y <= ptEnd.Y) do begin
nInLine := fTSearch.FindAll(Lines[ptCurrent.Y - 1]);
// Operate on all results in this line
n := 0;
while nInLine > 0 do begin
nFound := fTSearch.Results[n];
inc(n);
dec(nInLine);
// Is the search result entirely in the search range?
if not WithinValidSearchRange(nFound, nFound + nSearchLen) then continue;
// Select the text, so the user can see it in the OnReplaceText event
// handler or as the search result.
ptCurrent.X := nFound;
BlockBegin := ptCurrent;
Inc(ptCurrent.X, nSearchLen);
BlockEnd := ptCurrent;
CaretXY := ptCurrent;
bFoundFirst := True;
break;
end;
if bFoundFirst then break;
// search next line
Inc(ptCurrent.Y);
end;
if bFoundFirst then
begin
// update the valid search range start
ptStart := CaretXY;
// now try to find the second delimiter
fTSearch.Pattern := AStopDelim;
nSearchLen := Length(AStopDelim);
while (ptCurrent.Y >= ptStart.Y) and (ptCurrent.Y <= ptEnd.Y) do begin
nInLine := fTSearch.FindAll(Lines[ptCurrent.Y - 1]);
// Operate on all results in this line
n := 0;
while nInLine > 0 do begin
nFound := fTSearch.Results[n];
inc(n);
dec(nInLine);
// Is the search result entirely in the search range?
if not WithinValidSearchRange(nFound, nFound + nSearchLen) then continue;
// now we've found the second delimiter.
// so we extend the block to end after the second delimiter
ptCurrent.X := nFound;
Inc(ptCurrent.X, nSearchLen);
BlockEnd := ptCurrent;
CaretXY := ptCurrent;
// we're done now
Exit;
end;
// search next line
Inc(ptCurrent.Y);
end;
end;
finally
fTSearch.Free;
end;
end;
function TBricxccSynEdit.TextAtCursor: string;
var
p1, p2, c : TPoint;
begin
Result := WordAtCursor;
if Result = '' then
begin
p1 := BlockBegin;
p2 := BlockEnd;
c := CaretXY;
try
SetSelWord;
Result := SelText;
finally
BlockBegin := p1;
BlockEnd := p2;
CaretXY := c;
end;
end;
end;
function TBricxccSynEdit.DelimitedStartEx(XY: TPoint; DelimChars: TSynIdentChars): TPoint;
var
CX, CY: integer;
Line: string;
begin
CX := XY.X;
CY := XY.Y;
// valid line?
if (CY >= 1) and (CY <= Lines.Count) then begin
Line := Lines[CY - 1];
CX := Min(CX, Length(Line) + 1);
if CX > 1 then begin // only find previous char, if not already on start of line
// if previous char isn't a delimiter search for the last delimiter
if not (Line[CX - 1] in DelimChars) then
CX := StrRScanForCharInSet(Line, CX - 1, DelimChars) + 1;
end;
end;
Result := Point(CX, CY);
end;
function TBricxccSynEdit.DelimitedEndEx(XY: TPoint; DelimChars : TSynIdentChars): TPoint;
var
CX, CY: integer;
Line: string;
begin
CX := XY.X;
CY := XY.Y;
// valid line?
if (CY >= 1) and (CY <= Lines.Count) then
begin
Line := Lines[CY - 1];
CX := StrScanForCharInSet(Line, CX, DelimChars);
// if no "whitespace" is found just position at the end of the line
if CX = 0 then
CX := Length(Line) + 1;
end;
Result := Point(CX,CY);
end;
function TBricxccSynEdit.DelimitedStart(DelimChars: TSynIdentChars): TPoint;
begin
Result := DelimitedStartEx(CaretXY, DelimChars);
end;
function TBricxccSynEdit.DelimitedEnd(DelimChars: TSynIdentChars): TPoint;
begin
Result := DelimitedEndEx(CaretXY, DelimChars);
end;
function TBricxccSynEdit.TextWithinDelimiters(DelimChars: TSynIdentChars): string;
var
bBegin: TPoint;
bEnd: TPoint;
begin
bBegin := BlockBegin;
bEnd := BlockEnd;
BlockBegin := DelimitedStart(DelimChars);
BlockEnd := DelimitedEnd(DelimChars);
Result := SelText;
BlockBegin := bBegin;
BlockEnd := bEnd;
end;
procedure TBricxccSynEdit.ToggleBookMark(BookMark: Integer);
var
bMarkIsSet : boolean;
X, Y : integer;
begin
bMarkIsSet := GetBookMark(BookMark, X, Y);
// is the mark set on the current line?
if bMarkIsSet and (CaretY = Y) then
ClearBookMark(BookMark)
else
SetBookMark(BookMark, CaretX, CaretY);
end;
procedure TBricxccSynEdit.SetCaretAndSel(const ptCaret, ptBefore, ptAfter: TPoint);
begin
{$IFDEF FPC}
CaretXY := ptCaret;
BlockBegin := ptBefore;
BlockEnd := ptAfter;
{$ELSE}
SetCaretAndSelection(ptCaret, ptBefore, ptAfter);
{$ENDIF}
end;
{$IFDEF FPC}
procedure TBricxccSynEdit.EnsureCursorPosVisibleEx(ForceToMiddle: Boolean);
begin
EnsureCursorPosVisible;
// scroll to middle???
end;
function TBricxccSynEdit.GetWordAtCursor: string;
var
bBegin: TPoint;
bEnd: TPoint;
begin
bBegin := BlockBegin;
bEnd := BlockEnd;
BlockBegin := WordStart;
BlockEnd := WordEnd;
Result := SelText;
BlockBegin := bBegin;
BlockEnd := bEnd;
end;
function TBricxccSynEdit.WordStart: TPoint;
begin
Result := WordStartEx(CaretXY);
end;
function TBricxccSynEdit.WordEnd: TPoint;
begin
Result := WordEndEx(CaretXY);
end;
function TBricxccSynEdit.WordStartEx(XY: TPoint): TPoint;
var
CX, CY: integer;
Line: string;
aIdentChars, aWhiteChars: TSynIdentChars;
begin
CX := XY.X;
CY := XY.Y;
// valid line?
if (CY >= 1) and (CY <= Lines.Count) then begin
Line := Lines[CY - 1];
CX := Min(CX, Length(Line) + 1);
PrepareIdentChars(aIdentChars, aWhiteChars);
if CX > 1 then begin // only find previous char, if not already on start of line
// if previous char isn't a "whitespace" search for the last IdentChar
if not (Line[CX - 1] in aWhiteChars) then
CX := StrRScanForCharInSet(Line, CX - 1, aWhiteChars) + 1;
end;
end;
Result := Point(CX, CY);
end;
function TBricxccSynEdit.WordEndEx(XY: TPoint): TPoint;
var
CX, CY: integer;
Line: string;
aIdentChars, aWhiteChars: TSynIdentChars;
begin
CX := XY.X;
CY := XY.Y;
// valid line?
if (CY >= 1) and (CY <= Lines.Count) then
begin
Line := Lines[CY - 1];
PrepareIdentChars(aIdentChars, aWhiteChars);
CX := StrScanForCharInSet(Line, CX, aWhiteChars);
// if no "whitespace" is found just position at the end of the line
if CX = 0 then
CX := Length(Line) + 1;
end;
Result := Point(CX,CY);
end;
procedure TBricxccSynEdit.PrepareIdentChars(var aIdentChars, aWhiteChars: TSynIdentChars);
var
aWordBreakChars: TSynIdentChars;
begin
if Assigned(Highlighter) then
begin
aIdentChars := Highlighter.IdentChars;
aWordBreakChars := Highlighter.WordBreakChars;
end else begin
aIdentChars := TSynValidStringChars;
aWordBreakChars := TSynWordBreakChars;
end;
aIdentChars := aIdentChars - aWordBreakChars;
aWhiteChars := [#1..#255] - aIdentChars;
end;
{$ENDIF}
end.