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CoolMemo.pas
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(**
* Highlight with TMemo Impossible? try this...
* by Gon Perez-Jimenez May'04
*
* This is a sample how to work with highlighting within TMemo component by
* using interjected class technique.
*
* Of course, this code is still uncompleted but it works fine for my
* purposes, so, hope you can improve it and use it.
*
*)
(*
* Many addtions by Makhaon Software
* AutoComplet from DB
* Multi-level Undo/Redo
* And other. Thanks for Gon Perez-Jimenez for basis code
* (c) 2006 - 2017
*)
unit CoolMemo;
interface
uses
Winapi.Windows, Winapi.Messages, Vcl.StdCtrls, System.Classes, Vcl.Controls, Vcl.Graphics,
System.SysUtils, System.Contnrs, Vcl.Forms,
System.IniFiles, Vcl.Themes, Vcl.Clipbrd, Data.DB, System.Math, System.Types;
type
TCoolMemo = class;
TStrBoolFunc = function(const s: string): boolean of object;
TPopupListBox = class(TCustomListBox)
private
FOldItemIndex: integer;
function IsKeyPressed(Key: word): boolean;
procedure WMCancelMode(var Message: TMessage); message WM_CANCELMODE;
protected
procedure CreateParams(var Params: TCreateParams); override;
procedure CreateWnd; override;
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: integer); override;
procedure MouseMove(Shift: TShiftState; X, Y: integer); override;
procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: integer); override;
public
constructor Create(AOwner: TComponent); override;
end;
TAutoCompleteLink = class(TDataLink)
private
FCoolMemo: TCoolMemo;
FDataField: TField;
FDataFieldName: string;
procedure PopulateDataField;
procedure SetDataFieldName(const Value: string);
property DataField: TField Read FDataField;
property DataFieldName: string Read FDataFieldName Write SetDataFieldName;
protected
procedure ActiveChanged; override;
public
constructor Create(CoolMemo: TCoolMemo);
end;
TAutoComplete = class(TPersistent)
private
FCoolMemo: TCoolMemo;
FPopupListBox: TPopupListBox;
FItems: TStringList;
FItemIndex: integer;
FPrevItemIndex: integer;
FDropDownCount: integer;
FDropDownWidth: integer;
FEnabled: boolean;
FVisible: boolean;
function FindSelectedItem: boolean;
function GetItemIndex: integer;
procedure CloseUp(Apply: boolean);
function GetPhraseOnPos(const S: string; PhraseDelims: TSysCharSet; Pos: integer): string;
function GetPhraseOnPositions(const S: string; var PosB, PosE: integer): string;
procedure ReplacePhrase(const NewString: string);
procedure SelectItem;
procedure SetItemIndex(Value: integer);
procedure SetItems(AItems: TStringList);
function DoKeyDown(Key: word; Shift: TShiftState): boolean;
procedure DoKeyPress(Key: char);
public
constructor Create(ACoolMemo: TCoolMemo);
destructor Destroy; override;
procedure DoCompletion;
procedure DropDown(AlwaysShow: boolean);
property Items: TStringList Read FItems Write SetItems;
property ItemIndex: integer Read GetItemIndex Write SetItemIndex;
property Visible: boolean Read FVisible Write FVisible;
published
property DropDownCount: integer Read FDropDownCount Write FDropDownCount default 6;
property DropDownWidth: integer Read FDropDownWidth Write FDropDownWidth default 300;
property Enabled: boolean Read FEnabled Write FEnabled default True;
end;
TUndoRedoAction = (uaNone, uaKeyType, uaEnter, uaBackspace, uaDelete, uaCut, uaPaste, uaClear, uaAutoComplete);
TUndoRedoItem = class
private
FAction: TUndoRedoAction;
FCaretPos: TPoint;
FText: string;
FSelStart: integer;
FSelText: string;
public
constructor Create;
end;
TUndoRedoList = class(TObjectList)
private
FCoolMemo: TCoolMemo;
FMaxUndoRedoCount: integer;
function GetPosBySelStart(SelStart: integer): TPoint;
procedure SetMaxUndoCount(Value: integer);
procedure DoUndo;
procedure DoRedo;
function AddKeyUndo(const UndoKey: char = #0; FuncKey: boolean = False): TUndoRedoItem;
function AddClipboardUndo(UndoAction: TUndoRedoAction): TUndoRedoItem;
function AddAutoCompleteUndo(const AText, ASelText: string): TUndoRedoItem;
function AddItem(UndoRedoItem: TUndoRedoItem): TUndoRedoItem;
property MaxUndoRedoCount: integer Read FMaxUndoRedoCount Write SetMaxUndoCount default 1024;
public
constructor Create(ACoolMemo: TCoolMemo);
end;
TLexemeRec = record
LexKind: (lkDigit, lkWord);
Word: string;
AddWord: string;
Color: TColor;
Group: integer;
Size: integer;
Bold: boolean;
Italic: boolean;
end;
TLineHighLighter = array of TColor;
TCoolMemo = class(TCustomMemo)
private
FAutoComplete: TAutoComplete;
FUndo: TUndoRedoList;
FRedo: TUndoRedoList;
FIgnoreKeyPress: boolean;
FShiftKey: TShiftState;
FLexemes: array of TLexemeRec;
FDataLink: TAutoCompleteLink;
FLineHighLihgt: boolean;
FLineHighLighter: TLineHighLighter;
FRightClickMoveCaret: boolean;
FAddMenu: boolean;
FAutoSuggest: boolean;
FBackColor: TColor;
FOnSpellCheck: TStrBoolFunc;
FMinusIsSeparator: boolean;
function GetDataFieldName: string;
function GetDataSource: TDataSource;
function GetMaxUndoCount: integer;
function IsClipboardKey(Key: char): boolean;
procedure SetDataFieldName(const Value: string);
procedure SetDataSource(Value: TDataSource);
procedure SetFont(Font: Tfont; const word: string; LineNumber: integer);
procedure SetMaxUndoCount(Value: integer);
procedure AssignLexem(const FromLexeme: TLexemeRec; ToLexeme: integer);
procedure ClearLexems;
function ColStart: integer;
function CaretCol: integer;
function Line: integer;
function TopLine: integer;
function GetLexKind(const s: string): integer;
function VisibleLines: integer;
function CanUndo: boolean;
function CanRedo: boolean;
procedure GotoXY(mCol, mLine: integer);
procedure RefreshDBItems;
procedure SetBackColor(const Value: TColor);
function NextWord(var s: string; var PrevWord: string; var SpellOK: boolean): string;
protected
procedure WMPaint(var Message: TWMPaint); message WM_PAINT;
procedure WMSize(var Message: TWMSize); message WM_SIZE;
procedure WMMove(var Message: TWMMove); message WM_MOVE;
procedure WMVScroll(var Message: TWMMove); message WM_VSCROLL;
procedure WMMousewheel(var Message: TWMMove); message WM_MOUSEWHEEL;
procedure WMCapturechanged(var Message: TWMMove); message WM_CAPTURECHANGED;
procedure WMEraseBkgnd(var Message: TWMMove); message WM_ERASEBKGND;
procedure WMKillFocus(var Message: TWMKillFocus); message WM_KILLFOCUS;
procedure WMCut(var Message); message WM_CUT;
procedure WMPaste(var Message); message WM_PASTE;
procedure WMClear(var Message); message WM_CLEAR;
procedure Change; override;
procedure KeyDown(var Key: word; Shift: TShiftState); override;
procedure KeyPress(var Key: char); override;
procedure KeyUp(var Key: word; Shift: TShiftState); override;
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: integer); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function LoadLexems(const FileName: string): boolean;
function GetGroup(const s: string): integer;
function GetGroupCount(GroupNum: integer): integer;
function GetWordFromGroup(WordNum, Group: integer; const SelWord: string): string;
function CaretLine: integer;
procedure Redo;
procedure Undo;
procedure AddLexem(const ALexemeRec: TLexemeRec);
procedure DelToGroup(Group: integer);
property LineHighLihgt: boolean Read FLineHighLihgt Write FLineHighLihgt;
property LineHighLighter: TLineHighLighter Read FLineHighLighter Write FLineHighLighter;
published
property AutoSuggest: boolean Read FAutoSuggest Write FAutoSuggest default True;
property AddMenu: boolean Read FAddMenu Write FAddMenu default False;
property RightClickMoveCaret: boolean Read FRightClickMoveCaret Write FRightClickMoveCaret;
property BackColor: TColor Read FBackColor Write SetBackColor default $E1C8FA;
property DataField: string Read GetDataFieldName Write SetDataFieldName;
property DataSource: TDataSource Read GetDataSource Write SetDataSource;
property Align;
property Alignment;
property Anchors;
property AutoComplete: TAutoComplete Read FAutoComplete Write FAutoComplete;
property BevelEdges;
property BevelInner;
property BevelKind default bkNone;
property BevelOuter;
property BiDiMode;
property BorderStyle;
property Color;
property Constraints;
property Ctl3D;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property Font;
property HideSelection;
property ImeMode;
property ImeName;
property Lines;
property MaxLength;
property OEMConvert;
property ParentBiDiMode;
property ParentColor;
property ParentCtl3D;
property ParentFont;
property ParentShowHint;
property PopupMenu;
property ReadOnly;
property ScrollBars;
property ShowHint;
property TabOrder;
property TabStop;
property MaxUndoCount: integer Read GetMaxUndoCount Write SetMaxUndoCount default 1024;
property Visible;
property WantReturns;
property WantTabs;
property WordWrap;
property OnChange;
property OnClick;
property OnContextPopup;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnStartDock;
property OnStartDrag;
property OnSpellCheck: TStrBoolFunc Read FOnSpellCheck Write FOnSpellCheck;
property MinusIsSeparator: boolean Read FMinusIsSeparator Write FMinusIsSeparator default True;
end;
procedure Register;
implementation
const
LEFT_SHIFT = 1;
DEFAULT_VALUE = MaxInt;
AutoCompleteChars = #8 + #46 +
'_0123456789QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnmЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮЁйцукенгшщзхъфывапролджэячсмитьбюё';
Separators: TSysCharSet = [#00, ' ', '-', #13, #10, '.', ',', '/', '\', '#', '"', '''', ':',
'+', '%', '*', '(', ')', ';', '=', '{', '}', '[', ']', '<', '>'];
////////////////////////////////////////////////////////////////////////////////
// functions for managing keywords and numbers of each line of TMemo ///////////
////////////////////////////////////////////////////////////////////////////////
function IsSeparator(Car: char; MinusIsSeparator: boolean): boolean;
begin
case Car of
'.', ';', ',', ':', '!', '·', '"', '''', '^', '+', '*', '/', '\',
' ', '`', '[', ']', '(', ')', '{', '}', '?', '%', '=': Result :=
True;
'-': Result := MinusIsSeparator;
else
Result := False;
end;
end;
////////////////////////////////////////////////////////////////////////////////
function TCoolMemo.NextWord(var s: string; var PrevWord: string; var SpellOK: boolean): string;
begin
try
Result := '';
PrevWord := '';
if s = '' then
Exit;
while (s <> '') and IsSeparator(s[1], FMinusIsSeparator) do
begin
PrevWord := PrevWord + s[1];
Delete(s, 1, 1);
end;
while (s <> '') and not IsSeparator(s[1], FMinusIsSeparator) do
begin
Result := Result + s[1];
Delete(s, 1, 1);
end;
finally
if (Result = '') or (not Assigned(FOnSpellCheck)) then
SpellOK := True
else
SpellOK := FOnSpellCheck(Result);
end;
end;
function TCoolMemo.VisibleLines: integer;
begin
Result := Height div (Abs(Self.Font.Height) + 2);
end;
procedure TCoolMemo.GotoXY(mCol, mLine: integer);
begin
Dec(mLine);
SelStart := 0;
SelLength := 0;
SelStart := mCol + Self.Perform(EM_LINEINDEX, mLine, 0);
SelLength := 0;
Winapi.Windows.SetFocus(Handle);
end;
function TCoolMemo.TopLine: integer;
begin
Result := SendMessage(Self.Handle, EM_GETFIRSTVISIBLELINE, 0, 0);
end;
function TCoolMemo.CaretLine: integer;
begin
Result := SendMessage(Self.Handle, EM_LINEFROMCHAR, WPARAM(Self.SelStart + Self.SelLength), 0);
end;
function TCoolMemo.Line: integer;
begin
Result := SendMessage(Self.Handle, EM_LINEFROMCHAR, WPARAM(Self.SelStart), 0);
end;
function TCoolMemo.CaretCol: integer;
begin
Result := Self.SelStart + Self.SelLength - SendMessage(Self.Handle, EM_LINEINDEX, WPARAM(CaretLine), 0);
end;
function TCoolMemo.ColStart: integer;
begin
Result := Self.SelStart - SendMessage(Self.Handle, EM_LINEINDEX, SendMessage(Self.Handle,
EM_LINEFROMCHAR, WPARAM(Self.SelStart), 0), 0);
end;
procedure TCoolMemo.WMVScroll(var Message: TWMMove);
begin
Invalidate;
inherited;
end;
procedure TCoolMemo.WMSize(var Message: TWMSize);
begin
Invalidate;
inherited;
end;
procedure TCoolMemo.WMMove(var Message: TWMMove);
begin
Invalidate;
inherited;
end;
procedure TCoolMemo.WMMousewheel(var Message: TWMMove);
begin
Invalidate;
inherited;
end;
procedure TCoolMemo.Change;
begin
Invalidate;
inherited Change;
end;
procedure TCoolMemo.WMPaint(var Message: TWMPaint);
var
PS: TPaintStruct;
DC: HDC;
Canvas: TCanvas;
i: integer;
X, Y: integer;
Size, Size2: TSize;
Max: integer;
s, Palabra, PrevWord, CurrStr: string;
TempSelStart, TempSelEnd: integer;
TempColStart, TempColEnd: integer;
SpellOK: boolean;
begin
DC := Message.DC;
if DC = 0 then
DC := BeginPaint(Handle, PS);
Canvas := TCanvas.Create;
try
TempSelStart := Line;
TempSelEnd := CaretLine;
TempColStart := ColStart;
TempColEnd := CaretCol;
try
Canvas.Handle := DC;
Canvas.Font.Name := Font.Name;
Canvas.Font.Size := Font.Size;
with Canvas do
begin
Max := TopLine + VisibleLines;
if Max > Pred(Lines.Count) then
Max := Pred(Lines.Count);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
FillRect(Rect(0, 0, Width, 1));
Y := 1;
for i := TopLine to Max do
begin
if InRange(i, TempSelStart, TempSelEnd) and (Self.SelLength > 0) then
begin
CurrStr := Lines[i];
if (TempColStart > 0) and (i = TempSelStart) and (TempSelStart = TempSelEnd) then
begin
X := LEFT_SHIFT;
s := Copy(Lines[i], 1, TempColStart);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
TextOut(X, Y, s);
GetTextExtentPoint32(DC, PChar(s), Length(s), Size);
Inc(X, Size.cx);
s := Copy(Lines[i], TempColStart + 1, TempColEnd - TempColStart);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextSelected);
Brush.Color := clHighlight;
TextOut(X, Y, s);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
GetTextExtentPoint32(DC, PChar(s), Length(s), Size);
Inc(X, Size.cx);
s := Copy(Lines[i], TempColEnd + 1, MaxInt);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
TextOut(X, Y, s);
end
else if (TempColStart > 0) and (i = TempSelStart) then
begin
X := LEFT_SHIFT;
s := Copy(Lines[i], 1, TempColStart);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
TextOut(X, Y, s);
GetTextExtentPoint32(DC, PChar(s), Length(s), Size);
Inc(X, Size.cx);
s := Copy(Lines[i], TempColStart + 1, MaxInt);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextSelected);
Brush.Color := clHighlight;
TextOut(X, Y, s);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
end
else if (TempColEnd < Length(Lines[i])) and (i = TempSelEnd) then
begin
X := LEFT_SHIFT;
s := Copy(Lines[i], 1, TempColEnd);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextSelected);
Brush.Color := clHighlight;
TextOut(X, Y, s);
GetTextExtentPoint32(DC, PChar(s), Length(s), Size);
Inc(X, Size.cx);
s := Copy(Lines[i], TempColEnd + 1, MaxInt);
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
TextOut(X, Y, s);
end
else
begin
s := Lines[i];
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextSelected);
Brush.Color := clHighlight;
TextOut(LEFT_SHIFT, Y, s);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
end;
end
else
begin
X := LEFT_SHIFT;
s := Lines[i];
CurrStr := s;
//Detecto todas las palabras de esta lнnea
Palabra := NextWord(s, PrevWord, SpellOK);
while Palabra <> '' do
begin
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
TextOut(X, Y, PrevWord);
GetTextExtentPoint32(DC, PChar(PrevWord), Length(PrevWord), Size);
Inc(X, Size.cx);
SetFont(Font, Palabra, i);
if not SpellOK then
Brush.Color := FBackColor;
TextOut(X, Y, Palabra);
GetTextExtentPoint32(DC, PChar(Palabra), Length(Palabra), Size);
Inc(X, Size.cx);
Palabra := NextWord(s, PrevWord, SpellOK);
if not SpellOK then
Brush.Color := FBackColor;
if (s = '') and (PrevWord <> '') then
begin
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
TextOut(X, Y, PrevWord);
end;
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
end;
if (s = '') and (PrevWord <> '') then
begin
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal);
TextOut(X, Y, PrevWord);
end;
end;
s := 'W';
GetTextExtentPoint32(DC, PChar(s), Length(s), Size);
GetTextExtentPoint32(DC, PChar(CurrStr), Length(CurrStr), Size2);
Brush.Color:= StyleServices.GetStyleColor(scEditDisabled);
FillRect(Rect(0, Y, LEFT_SHIFT, Y + Size.cy));
FillRect(Rect(Size2.cx + LEFT_SHIFT, Y, Width, Y + Size.cy));
Inc(Y, Size.cy);
end;
if Y < Height then
FillRect(Rect(0, Y, Width, Height));
end;
finally
if Message.DC = 0 then
EndPaint(Handle, PS);
end;
finally
FreeAndNil(Canvas);
end;
inherited;
end;
procedure TCoolMemo.WMCapturechanged(var Message: TWMMove);
begin
Invalidate;
inherited;
end;
procedure TCoolMemo.WMEraseBkgnd(var Message: TWMMove);
begin
Message.Result := 1;
end;
function TCoolMemo.LoadLexems(const FileName: string): boolean;
var
Groups, Words: integer;
IniFile: TIniFile;
i, j: integer;
begin
Result := False;
ClearLexems;
if not FileExists(FileName) then
Exit;
IniFile := TIniFile.Create(FileName);
try
Groups := IniFile.ReadInteger('Common', 'Groups', -1);
SetLength(FLexemes, 1);
with FLexemes[0] do
begin
LexKind := lkDigit;
Word := '';
Color := IniFile.ReadInteger('Digits', 'Color', clRed);
Size := IniFile.ReadInteger('Digits', 'Size', 0);
Bold := IniFile.ReadBool('Digits', 'Bold', False);
Italic := IniFile.ReadBool('Digits', 'Italic', False);
Group := 0;
end;
for i := 1 to Groups do
begin
Words := IniFile.ReadInteger('Group' + IntToStr(i), 'Words', -1);
for j := 1 to Words do
begin
SetLength(FLexemes, Length(FLexemes) + 1);
with FLexemes[High(FLexemes)] do
begin
LexKind := lkWord;
AddWord := IniFile.ReadString('Group' + IntToStr(i), 'Word' + IntToStr(j), '');
Word := AnsiUpperCase(AddWord);
Color := StringToColor(IniFile.ReadString('Group' + IntToStr(i), 'Color', ColorToString(clBlack)));
Size := IniFile.ReadInteger('Group' + IntToStr(i), 'Size', 0);
Bold := IniFile.ReadBool('Group' + IntToStr(i), 'Bold', False);
Italic := IniFile.ReadBool('Group' + IntToStr(i), 'Italic', False);
Group := i;
end;
end;
end;
finally
FreeAndNil(IniFile);
end;
Result := True;
end;
procedure TCoolMemo.SetFont(Font: Tfont; const word: string; LineNumber: integer);
var
TempLexKind: integer;
begin
if FLineHighLihgt then
begin
if LineNumber > High(FLineHighLighter) then
Font.Color := Self.Font.Color
else
Font.Color := FLineHighLighter[LineNumber];
end
else
begin
TempLexKind := GetLexKind(word);
if TempLexKind = DEFAULT_VALUE then
Font.Color := StyleServices.GetStyleFontColor(sfEditBoxTextNormal)
else
with FLexemes[TempLexKind] do
Font.Color := Color;
end;
end;
function TCoolMemo.GetLexKind(const s: string): integer;
var
i: integer;
s1: string;
begin
Result := DEFAULT_VALUE;
if Assigned(FLexemes) then
begin
s1 := AnsiUpperCase(s);
if TryStrToInt(s1, i) then
begin
Result := 0;
exit;
end;
for i := 0 to High(FLexemes) do
if (FLexemes[i].Word = s1) and (FLexemes[i].LexKind <> lkDigit) then
begin
Result := i;
exit;
end;
end;
end;
procedure Register;
begin
RegisterComponents('Makhaon', [TCoolMemo]);
end;
function TCoolMemo.GetGroupCount(GroupNum: integer): integer;
var
i: integer;
begin
Result := 0;
for i := 0 to High(FLexemes) do
if FLexemes[i].Group = GroupNum then
Inc(Result);
end;
function TCoolMemo.GetWordFromGroup(WordNum, Group: integer; const SelWord: string): string;
var
FoundWord, i: integer;
s1: string;
begin
Result := '';
FoundWord := 0;
s1 := AnsiUpperCase(SelWord);
for i := 0 to High(FLexemes) do
begin
if (FLexemes[i].Group = Group) and (FLexemes[i].Word <> SelWord) then
Inc(FoundWord);
if FoundWord = WordNum then
begin
Result := (FLexemes[i].AddWord);
Exit;
end;
end;
end;
function TCoolMemo.GetGroup(const s: string): integer;
var
i: integer;
s1: string;
begin
Result := DEFAULT_VALUE;
if s = '' then
Exit;
s1 := AnsiUpperCase(s);
for i := 0 to High(FLexemes) do
if FLexemes[i].Word = s1 then
begin
Result := FLexemes[i].Group;
Break;
end;
end;
constructor TCoolMemo.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FAutoComplete := TAutoComplete.Create(Self);
FUndo := TUndoRedoList.Create(Self);
FRedo := TUndoRedoList.Create(Self);
FDataLink := TAutoCompleteLink.Create(Self);
FBackColor := $E1C8FA;
FRightClickMoveCaret := False;
FAutoSuggest := True;
FMinusIsSeparator := True;
end;
destructor TCoolMemo.Destroy;
begin
FreeAndNil(FDataLink);
FreeAndNil(FRedo);
FreeAndNil(FUndo);
FreeAndNil(FAutoComplete);
inherited Destroy;
end;
procedure TCoolMemo.KeyPress(var Key: char);
begin
inherited KeyPress(Key);
if FIgnoreKeyPress then
begin
FIgnoreKeyPress := False;
Key := #0;
end
else
if (not IsClipboardKey(Key)) then
if not ((FShiftKey = [ssCtrl]) and (Key = 'Z')) then // Ctrl + Z (Undo)
FUndo.AddKeyUndo(Key)
else
begin
FUndo.DoUndo;
Key := #0;
end;
end;
{ TAutoComplete }
procedure TAutoComplete.CloseUp(Apply: boolean);
begin
FPrevItemIndex := FItemIndex;
FItemIndex := ItemIndex;
FPopupListBox.Visible := False;
FVisible := False;
if Apply and (ItemIndex > -1) then
ReplacePhrase(FItems[ItemIndex]); // Put word/phrase from auto-complete list
end;
constructor TAutoComplete.Create(ACoolMemo: TCoolMemo);
begin
inherited Create;
FCoolMemo := ACoolMemo;
FItems := TStringList.Create;
FPrevItemIndex := -1;
FItemIndex := -1;
FDropDownCount := 6;
FDropDownWidth := 300;
FEnabled := True;
FPopupListBox := TPopupListBox.Create(FCoolMemo);
end;
destructor TAutoComplete.Destroy;
begin
FreeAndNil(FItems);
FreeAndNil(FPopupListBox);
inherited;
end;
procedure TAutoComplete.DoCompletion;
begin
if FCoolMemo.ReadOnly then
Exit;
if FPopupListBox.Visible then
CloseUp(False);
DropDown(True);
end;
function TAutoComplete.DoKeyDown(Key: word; Shift: TShiftState): boolean;
begin
Result := True;
case Key of
VK_ESCAPE:
CloseUp(False);
VK_RETURN:
CloseUp(True);
VK_UP, VK_DOWN, VK_PRIOR, VK_NEXT:
FPopupListBox.Perform(WM_KEYDOWN, Key, 0);
else
Result := False;
end;
end;
procedure TAutoComplete.DoKeyPress(Key: char);
begin
if FVisible then
if Pos(Key, AutoCompleteChars) > 0 then
SelectItem
else
CloseUp(True);
end;
procedure TAutoComplete.DropDown(AlwaysShow: boolean);
var
ItemsCount: integer;
ListHeight, ListWidth: integer;
X, Y, AddedLineIndex: integer;
R: longint;
P, OldCursorPos: TPoint;
begin
CloseUp(False);
if (not FEnabled) or (FItems.Count = 0) or (not FindSelectedItem and not AlwaysShow) then
Exit;
FPopupListBox.Items := FItems;
FPopupListBox.Style := lbOwnerDrawFixed;
FPopupListBox.ItemHeight := Round(FCoolMemo.Font.Size * 1.5);
FVisible := True;
ItemIndex := FItemIndex;
ItemsCount := FItems.Count;
X := 0;
Y := 0;
with FCoolMemo do
begin
Lines.BeginUpdate;
OldCursorPos := GetCaretPos;
AddedLineIndex := Lines.Add('');
GotoXY(OldCursorPos.X, OldCursorPos.Y + 1);
R := Perform(EM_POSFROMCHAR, SelStart + SelLength, 0);
if R >= 0 then
begin
X := LoWord(R);
Y := HiWord(R);
end;
P := Parent.ClientToScreen(Point(Left, Top));
X := P.X + X + 4;
Y := P.Y + Y + 4 + Abs(FCoolMemo.Font.Height) + 2;
Lines.Delete(AddedLineIndex);
GotoXY(OldCursorPos.X, OldCursorPos.Y + 1);
Lines.EndUpdate;
end;
if ItemsCount > FDropDownCount then
ItemsCount := FDropDownCount;
ListHeight := FPopupListBox.ItemHeight * ItemsCount + 2;
ListWidth := FDropDownWidth;
if ListWidth = 0 then
ListWidth := FCoolMemo.Width + 2 * GetSystemMetrics(SM_CXBORDER);
FPopupListBox.Left := X;
FPopupListBox.Top := Y;
FPopupListBox.Width := ListWidth;
FPopupListBox.Height := ListHeight;
if Y + FPopupListBox.Height > Screen.Height then
Y := Y - FPopupListBox.Height - (Abs(FCoolMemo.Font.Height) + 2 + 4);
SetWindowPos(FPopupListBox.Handle, HWND_TOP, X, Y, 0, 0,
SWP_NOSIZE or SWP_NOACTIVATE or SWP_SHOWWINDOW);
FPopupListBox.Visible := True;
end;
function TAutoComplete.FindSelectedItem: boolean;
var
s: string;
i, j, k: integer;
PhraseDelims: TSysCharSet;
begin
for j := 1 to 3 do
begin
case j of
1: PhraseDelims := ['.']; // separeted by dot
2: PhraseDelims := [#13, #10]; // separated by line break
else
PhraseDelims := [' ']; // separated by space
end;
with FCoolMemo do
if Lines.Count > 0 then
s := TrimLeft(GetPhraseOnPos(Lines[CaretLine], PhraseDelims, CaretCol))
else
s := '';
k := -1;
if s <> '' then
begin
i := 0;
while i <= FItems.Count - 1 do
begin
if ANSIStrLIComp(PChar(FItems[i]), PChar(s), Length(s)) = 0 then
begin
k := i;
Break;
end;
Inc(i);
end;
if k > -1 then
Break;
end;
end;
ItemIndex := k;
Result := ItemIndex > -1;
end;
function TAutoComplete.GetItemIndex: integer;
begin
Result := FItemIndex;
if FVisible then
Result := FPopupListBox.ItemIndex;
end;
function TAutoComplete.GetPhraseOnPos(const S: string; PhraseDelims: TSysCharSet; Pos: integer): string;
var
I, Count: integer;
begin
I := Pos;
while (I > 0) and not (CharInSet(S[I], PhraseDelims)) do
Dec(I);
Count := Pos - I;
if (I > 0) and (CharInSet(S[I], PhraseDelims)) then
Inc(I);
Result := Copy(S, I, Count);
end;
function TAutoComplete.GetPhraseOnPositions(const S: string; var PosB, PosE: integer): string;
var
N, Len: integer;
AutoCompleteStr: string;
PhraseDelims: TSysCharSet;
Found: boolean;
begin
if ItemIndex > -1 then
begin
AutoCompleteStr := FItems[ItemIndex];
// Find begin index from cursor position to the start of line
if FPrevItemIndex > -1 then
begin
for N := 1 to 2 do
begin
case N of
1: PhraseDelims := ['.']; // separeted by dot
2: PhraseDelims := [#13, #10]; // separated by line break
end;
Found := False;
while (PosB > 0) and not (CharInSet(S[PosB], PhraseDelims)) do
Dec(PosB);
if (PosB > 0) and (CharInSet(S[PosB], PhraseDelims)) then
Found := True;
Inc(PosB);
while (PosB <= PosE) and (CharInSet(S[PosB], [' '])) do
Inc(PosB);
if Found then
Break;
end;
end
else
begin
while (PosB > 0) and not (CharInSet(S[PosB], Separators)) do
Dec(PosB);
Inc(PosB);
end;
// Find end index from cursor position to the end of the current word
Len := Length(S);
if Len > 0 then
begin
while (PosE < Len) and not (CharInSet(S[PosE], Separators)) do
Inc(PosE);
if CharInSet(S[PosE], Separators) then
Dec(PosE);
end;
Result := AutoCompleteStr;
end
else
Result := '';