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FMX.Memo.Style.pas
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FMX.Memo.Style.pas
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{*******************************************************}
{ }
{ Delphi FireMonkey Platform }
{ }
{ Copyright(c) 2011-2023 Embarcadero Technologies, Inc. }
{ All rights reserved }
{ }
{*******************************************************}
unit FMX.Memo.Style;
interface
{$SCOPEDENUMS ON}
uses
System.Types, System.Classes, System.UITypes, System.Generics.Collections,
FMX.Platform, FMX.Memo, FMX.Graphics, FMX.Types, FMX.Controls, FMX.TextLayout,
FMX.Objects, FMX.MagnifierGlass, FMX.SpellChecker, FMX.Menus, FMX.Text,
FMX.Presentation.Messages, FMX.Presentation.Style, FMX.Controls.Presentation,
FMX.ScrollBox.Style, FMX.Memo.Types, FMX.Controls.Model;
type
///<summary>Record that describes text-editing operation</summary>
TEditAction = record
///<summary>Type of change that was made (text added or removed)</summary>
ActionType: TActionType;
///<summary>Defines that change was made right after the previous and was made in the similar way
///(e.g. text editing (delete and insert) via keyabord)</summary>
PairedWithPrev: Boolean;
///<summary>Position in text from which text was deleted or into which text was inserted</summary>
StartPosition: Integer;
///<summary>Fragmen of text that was deleted (for TActionType.Delete only)</summary>
DeletedFragment: string;
///<summary>Length of text that was inserted (for <c>TActionType.Insert</c> only)</summary>
Length: Integer;
///<summary>Was text inserted via typing from keyboard or not</summary>
Typed: Boolean;
///<summary>Was removed text select or not</summary>
WasSelected: Boolean;
///<summary>Was caret moved after text was removed or not</summary>
CaretMoved: Boolean;
end;
TStyledMemo = class;
{ TEditActionStack }
///<summary>List of text-editing operations</summary>
TEditActionStack = class(TStack<TEditAction>)
private
[Weak]
FOwner: TStyledMemo;
public
constructor Create(const AOwner: TStyledMemo);
///<summary>New fragment of text was inserted</summary>
procedure FragmentInserted(const StartPos, FragmentLength: Integer; const PairedWithPrev, Typed: Boolean);
///<summary>Some text fragment was removed</summary>
procedure FragmentDeleted(const StartPos: Integer; const Fragment: string; const Selected, CaretMoved: Boolean);
///<summary>Revert last change</summary>
function RollBackAction: Boolean;
end;
TOnUpdateLayoutParams = procedure(Sender: TObject; Layout: TTextLayout; const Index: Integer) of object;
{ TStyledMemo }
///<summary>Styled presentation for <c>TMemo</c></summary>
TStyledMemo = class(TStyledCustomScrollBox, ITextInput, ITextSpellCheck, ITextSpellCheckActions)
protected
type
///<summary>Class that represents single rendering line</summary>
TLineObject = class
private
FSize: TSizeF;
FLayout: TTextLayout;
FRect: TRectF;
public
///<summary>Free text layout object if it exists</summary>
procedure FreeLayout;
///<summary>Does layout line has valid size</summary>
function SizeValid: Boolean;
///<summary>Reset current size and line rectangle if line parameters were changed</summary>
procedure InvalidateSize;
constructor Create; overload;
constructor Create(const ALayout: TTextLayout; const ASize: TSizeF); overload;
destructor Destroy; override;
//
property Size: TSizeF read FSize write FSize;
property Rect: TRectF read FRect write FRect;
property Layout: TTextLayout read FLayout write FLayout;
end;
///<summary>Providing a bridge between lines of text in TMemo.Model.Lines and the internal representation</summary>
TLines = class
private
[Weak]
FMemo: TStyledMemo;
FLines: TObjectList<TLineObject>;
FTopLine: Integer;
FDefaultHeight: Single;
FUpdating: Integer;
FNewContentBounds: TRectF;
FNeedUpdateContentSize: Boolean;
FOnUpdateLayoutParams: TOnUpdateLayoutParams;
function CreateLayout(const S: string; const Index: Integer): TTextLayout;
function IsWordWrap: Boolean;
procedure UpdateLayoutParams(Layout: TTextLayout; const Index: Integer);
procedure CalculateDefaultLineMetrics;
function GetDefaultLineHeight: Single;
function GetCount: Integer;
function GetItem(const Index: Integer): TLineObject;
procedure UpdateContentBounds(ContentBounds: TRectF);
protected
procedure UpdateLayoutsColor;
public
constructor Create(Memo: TStyledMemo);
destructor Destroy; override;
procedure BeginUpdate;
procedure EndUpdate;
function IsUpdating: Boolean;
procedure InsertLine(const Index: Integer; const S: string);
procedure DeleteLine(const Index: Integer);
procedure ReplaceLine(const Index: Integer; const S: string);
procedure ExchangeLines(const OldIndex, NewIndex: Integer);
//Caret support
///<summary>Get line number and position in line by the point coordinates</summary>
function GetPointPosition(const Pt: TPointF; const RoundToWord: Boolean = False): TCaretPosition;
///<summary>Get the coordinates on the region that holds range of text starting from defined line, position in
///that line and the defined length.</summary>
function GetRegionForRange(const ALine, APos, ALength: Integer; const RoundToWord: Boolean = False): TRegion;
//
procedure RenderLayouts;
//
property Count: Integer read GetCount;
property Items[const Index: Integer]: TLineObject read GetItem; default;
end;
///<summary>Inforation about a single misspelled word in the text</summary>
TSpellingWord = class
private
FPosition: TCaretPosition;
FLength: Integer;
FBounds: TRegion;
public
constructor Create(const APosition: TCaretPosition; const ALength: Integer; const ABounds: TRegion);
function HasBounds: Boolean;
function PosAtCurrentPos(const APosition: TCaretPosition): Boolean;
procedure InvalidateBounds;
property Position: TCaretPosition read FPosition write FPosition;
property Length: Integer read FLength write FLength;
property Bounds: TRegion read FBounds write FBounds;
end;
private
FTextService: TTextService;
FLMouseSelecting: Boolean;
FIgnoreMouseMove: Boolean;
FDownMPt: TPointF;
FOldMPt: TPointF;
FCaretPosition: TCaretPosition;
FMemoPopupMenu: TPopupMenu;
FActionStack: TEditActionStack;
FLineObjects: TLines;
FSelStart: TCaretPosition;
FSelEnd: TCaretPosition;
FSelected: Boolean;
FCursorFill: TBrush;
FContent: TControl;
FStartAutoScrollTimer: TTimer;
FAutoVScrollTimer: TTimer;
FAutoHScrollTimer: TTimer;
FNeedAutoVScroll: Boolean;
FNeedAutoHScroll: Boolean;
FFollowTheMouse: Boolean;
FCharsBuffer: string;
{ Selection }
FLeftSelPt: TSelectionPoint;
FRightSelPt: TSelectionPoint;
{ Loupe }
FLoupeService: ILoupeService;
{ ITextSettings }
FLineHeight: Single;
FSetFocusOnUp: Boolean;
FOldWordWrap: Boolean;
{ Spelling }
FSpellService: IFMXSpellCheckerService;
FSpellMenuItems: TList<TMenuItem>;
FSpellHightlightRect: TRectF;
FSpellFill: TBrush;
FSpellUnderlineBrush: TStrokeBrush;
FSpellingWords: TObjectList<TSpellingWord>;
FOnUpdateLayoutParams: TOnUpdateLayoutParams;
FNeedSelectorPoints: Boolean;
FScrollToCaret: Boolean;
FLinesBackgroundColor: TDictionary<Integer, TAlphaColor>;
FOnCaretMove: TNotifyEvent;
function GetModel: TCustomMemoModel;
function GetMemo: TCustomMemo;
function GetPageSize: Single;
procedure SetCaretPosition(const Value: TCaretPosition);
function GetNextWordBegin(const StartPosition: TCaretPosition): TCaretPosition;
function GetPrevWordBegin(const StartPosition: TCaretPosition): TCaretPosition;
function GetPositionShift(const APos: TCaretPosition; const Delta: Integer): TCaretPosition;
{ Selection }
function GetSelBeg: TCaretPosition;
function GetSelEnd: TCaretPosition;
procedure SelPtMouseUpHandler(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
procedure LeftSelPtChangePositionHandler(Sender: TObject; var X, Y: Single);
procedure LeftSelPtMouseDownHandler(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
procedure RightSelPtChangePositionHandler(Sender: TObject; var X, Y: Single);
procedure RightSelPtMouseDownHandler(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
{ Check spelling }
procedure FindSpellingErrorsInLine(const LineIndex: Integer);
procedure RemoveSpellingErrorsForLine(const LineIndex: Integer);
procedure DoScroll(const ADirection: Integer);
{ Loupe }
procedure HideLoupe;
procedure ShowLoupe;
procedure SetLoupePosition(const ASelectionPointType: TSelectionPointType); overload;
procedure SetLoupePosition(const X, Y: Single); overload;
// Selection Autoscroll
procedure StartAutoScroll(const X, Y: Single);
procedure StopAutoScroll;
procedure StartAutoScrollHandler(Sender: TObject);
procedure AutoScrollUpHandler(Sender: TObject);
procedure AutoScrollDownHandler(Sender: TObject);
procedure AutoScrollLeftHandler(Sender: TObject);
procedure AutoScrollRightHandler(Sender: TObject);
{ Spelling }
procedure UpdateSpellPopupMenu(const APoint: TPointF);
procedure SpellFixContextMenuHandler(Sender: TObject);
procedure SetOnUpdateLayoutParams(const Value: TOnUpdateLayoutParams);
procedure SetNeedSelectorPoints(const Value: Boolean);
procedure SetScrollToCaret(const Value: Boolean);
procedure UpdateLinesPos;
procedure SetOnCaretMove(const Value: TNotifyEvent);
function GetCanUndo: Boolean;
function GetCanCut: Boolean;
function GetCanPaste: Boolean;
function GetCanDelete: Boolean;
function GetCanCopy: Boolean;
function GetCanSelectAll: Boolean;
protected
FDisableCaretInsideWords: Boolean;
{ Messages from model }
procedure MMCharCaseChanged(var Message: TDispatchMessageWithValue<TEditCharCase>); message MM_MEMO_CHARCASE_CHANGED;
procedure MMCheckSpellingChanged(var Message: TDispatchMessageWithValue<Boolean>); message MM_MEMO_CHECKSPELLING_CHANGED;
procedure MMHideSelectionOnExitChanged(var Message: TDispatchMessageWithValue<Boolean>); message MM_MEMO_HIDESELECTIONONEXIT_CHANGED;
procedure MMReadOnlyChanged(var Message: TDispatchMessageWithValue<Boolean>); message MM_MEMO_READONLY_CHANGED;
procedure MMImeModeChanged(var Message: TDispatchMessageWithValue<TImeMode>); message MM_MEMO_IMEMODE_CHANGED;
procedure MMSetSelStart(var Message: TDispatchMessageWithValue<Integer>); message MM_MEMO_SELSTART_CHANGED;
procedure MMSelLengthChanged(var Message: TDispatchMessageWithValue<Integer>); message MM_MEMO_SELLENGTH_CHANGED;
procedure MMTextSettingsChanged(var Message: TDispatchMessage); message MM_MEMO_TEXT_SETTINGS_CHANGED;
procedure MMLinesInsertLine(var Message: TDispatchMessageWithValue<TCustomMemoModel.TLineInfo>); message MM_MEMO_LINES_INSERT_LINE;
procedure MMLinesPutLine(var Message: TDispatchMessageWithValue<TCustomMemoModel.TLineInfo>); message MM_MEMO_LINES_PUT_LINE;
procedure MMLinesDeleteLine(var Message: TDispatchMessageWithValue<TCustomMemoModel.TLineInfo>); message MM_MEMO_LINES_DELETE_LINE;
procedure MMLinesExchangeLines(var Message: TDispatchMessageWithValue<TCustomMemoModel.TLineInfo>); message MM_MEMO_LINES_EXCHANGE_LINES;
procedure MMLinesClear(var Message: TDispatchMessage); message MM_MEMO_LINES_CLEAR;
procedure MMUpdateStateChanged(var Message: TDispatchMessageWithValue<Boolean>); message MM_MEMO_UPDATE_STATE_CHANGED;
procedure MMGetCaretPosition(var Message: TDispatchMessageWithValue<TCaretPosition>); message MM_MEMO_GET_CARET_POSITION;
procedure MMSetCaretPosition(var Message: TDispatchMessageWithValue<TCaretPosition>); message MM_MEMO_SET_CARET_POSITION;
procedure MMCanSetFocus(var Message: TDispatchMessageWithValue<Boolean>); message MM_MEMO_CAN_SET_FOCUS;
procedure MMLinesChanged(var Message: TDispatchMessage); message MM_MEMO_LINES_CHANGED;
procedure MMMaxLengthChanged(var Message: TDispatchMessage); message MM_MEMO_MAXLENGTH_CHANGED;
procedure MMGetCaretPositionByPoint(var Message: TDispatchMessageWithValue<TCustomMemoModel.TGetCaretPositionInfo>); message MM_MEMO_GET_CARET_POSITION_BY_POINT;
{ Messages from presented control }
procedure PMInit(var Message: TDispatchMessage); message PM_INIT;
procedure PMGotoLineBegin(var Message: TDispatchMessage); message PM_MEMO_GOTO_LINE_BEGIN;
procedure PMGotoLineEnd(var Message: TDispatchMessage); message PM_MEMO_GOTO_LINE_END;
procedure PMFragmentInserted(var Message: TDispatchMessageWithValue<TFragmentInserted>); message PM_MEMO_UNDO_MANAGER_INSERT_TEXT;
procedure PMFragmentDeleted(var Message: TDispatchMessageWithValue<TFragmentDeleted>); message PM_MEMO_UNDO_MANAGER_DELETE_TEXT;
procedure PMUndo(var Message: TDispatchMessage); message PM_MEMO_UNDO_MANAGER_UNDO;
procedure PMSelectText(var Message: TDispatchMessage); message PM_MEMO_SELECT_TEXT;
procedure DoEndUpdate; override;
procedure DoContentPaint(Sender: TObject; Canvas: TCanvas; const ARect: TRectF); virtual;
//Animation mouse events
procedure AniMouseDown(const Touch: Boolean; const X, Y: Single); override;
procedure AniMouseMove(const Touch: Boolean; const X, Y: Single); override;
procedure AniMouseUp(const Touch: Boolean; const X, Y: Single); override;
///<summary>Returns default line height according to current text decoration settings</summary>
function GetLineHeight: Single;
///<summary>Creates popup menu items</summary>
procedure CreatePopupMenu; virtual;
///<summary>Updates the current state of popup menu items</summary>
procedure UpdatePopupMenuItems; virtual;
procedure ApplyStyle; override;
procedure FreeStyle; override;
procedure Resize; override;
///<summary>Raises OnChange event</summary>
procedure DoChange; virtual;
///<summary>Revert last text change</summary>
procedure DoUndo(Sender: TObject);
///<summary>Cut selected text to the clipboard</summary>
procedure DoCut(Sender: TObject);
///<summary>Copy selected text to the clipboard</summary>
procedure DoCopy(Sender: TObject);
///<summary>Paste text from clipboard to the current caret position</summary>
procedure DoPaste(Sender: TObject);
///<summary>Delete selected text</summary>
procedure DoDelete(Sender: TObject);
///<summary>Select all text</summary>
procedure DoSelectAll(Sender: TObject);
///<summary>Repainting content in memo</summary>
procedure RepaintEdit;
{ inherited }
function ShowContextMenu(const ScreenPosition: TPointF): Boolean; override;
procedure DoViewportPositionChange(const OldViewportPosition, NewViewportPosition: TPointF; const ContentSizeChanged: boolean); override;
procedure KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState); override;
procedure DoEnter; override;
procedure DoExit; override;
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Single); override;
procedure MouseMove(Shift: TShiftState; X, Y: Single); override;
/// <summary>Defines <c>TMemo</c> model class</summary>
function DefineModelClass: TDataModelClass; override;
{ ITouchEvents }
///<summary>Long tap</summary>
procedure LongTap(const X, Y: Single);
///<summary>Double tap</summary>
procedure DblTap;
procedure CMGesture(var EventInfo: TGestureEventInfo); override;
{ Selection }
procedure UpdateSelectionInModel; virtual;
function GetShowSelection: Boolean; virtual;
procedure BeginSelection;
procedure EndSelection;
procedure GetNormalizedSelectionRange(var ASelStart, ASelEnd: TCaretPosition);
procedure SetNormalizedSelectionRange(const ASelStart, ASelEnd: TCaretPosition);
function GetSelectionRegion: TRegion;
function HaveSelectionPickers: Boolean;
procedure UpdateSelectionPointPositions;
{ Caret }
procedure PutCaretTo(const X, Y: Single; const Select: Boolean = False; const PositionByWord: Boolean = False);
procedure SelectAtPos(const APos: TCaretPosition);
procedure UpdateCaretPosition(const UpdateScrllBars: Boolean);
procedure UpdateHScrlBarByCaretPos;
procedure UpdateVScrlBarByCaretPos;
{ ITextSpellCheck }
function IsSpellCheckEnabled: Boolean;
function IsCurrentWordWrong: Boolean;
function GetListOfPrepositions: TArray<string>;
procedure HighlightSpell;
procedure HideHighlightSpell;
{ ITextSpellCheckActions }
procedure Spell(const AWord: string);
{ ITextInput }
function GetTextService: TTextService;
function GetTargetClausePointF: TPointF;
procedure StartIMEInput;
procedure EndIMEInput;
procedure IMEStateUpdated;
function GetSelection: string;
function GetSelectionRect: TRectF;
function GetSelectionBounds: TRect;
function GetSelectionPointSize: TSizeF;
function HasText: Boolean;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure RecalcOpacity; override;
{ Caret }
procedure MoveCaretBy(const Delta: Integer);
procedure MoveCaretLeft;
procedure MoveCaretRight;
procedure MoveCaretVertical(const LineDelta: Integer);
procedure MoveCaretDown;
procedure MoveCaretUp;
procedure MoveCaretPageUp;
procedure MoveCaretPageDown;
function GetPositionPoint(const ACaretPos: TCaretPosition): TPointF;
procedure GotoLineBegin;
procedure GotoLineEnd;
procedure GotoTextBegin;
procedure GotoTextEnd;
property Memo: TCustomMemo read GetMemo;
///<summary>Component data model</summary>
property Model: TCustomMemoModel read GetModel;
///<summary>Current caret position in text</summary>
property CaretPosition: TCaretPosition read FCaretPosition write SetCaretPosition;
property DisableCaretInsideWords: Boolean read FDisableCaretInsideWords write FDisableCaretInsideWords;
property LineHeight: Single read GetLineHeight;
property SelBeg: TCaretPosition read GetSelBeg;
property SelEnd: TCaretPosition read GetSelEnd;
property PageSize: Single read GetPageSize;
///
property LineObjects: TLines read FLineObjects;
property OnUpdateLayoutParams: TOnUpdateLayoutParams read FOnUpdateLayoutParams write SetOnUpdateLayoutParams;
property NeedSelectorPoints: Boolean read FNeedSelectorPoints write SetNeedSelectorPoints;
property ScrollToCaret: Boolean read FScrollToCaret write SetScrollToCaret;
function GetWordAtPos(const X, Y: Single; out BeginWord, Line: Int64): string;
procedure UpdateVisibleLayoutParams; overload;
procedure UpdateVisibleLayoutParams(const Index: Integer); overload;
property OnCaretMove: TNotifyEvent read FOnCaretMove write SetOnCaretMove;
property LinesBackgroundColor: TDictionary<Integer, TAlphaColor> read FLinesBackgroundColor;
property CanUndo: Boolean read GetCanUndo;
property CanCut: Boolean read GetCanCut;
property CanPaste: Boolean read GetCanPaste;
property CanDelete: Boolean read GetCanDelete;
property CanCopy: Boolean read GetCanCopy;
property CanSelectAll: Boolean read GetCanSelectAll;
end;
implementation
uses
System.SysUtils, System.RTLConsts, System.Variants, FMX.Consts, System.Math,
System.UIConsts, System.Character, System.TypInfo, System.Math.Vectors,
FMX.Presentation.Factory, System.SyncObjs, FMX.Clipboard;
const
LOUPE_OFFSET = 10;
cnTouchAccuracy = 3;
IMEWindowGap = 2; // 2 is small space between conrol and IME window
CutStyleName = 'cut'; //Do not localize
UndoStyleName = 'undo'; //Do not localize
CopyStyleName = 'copy'; //Do not localize
PasteStyleName = 'paste'; //Do not localize
DeleteStyleName = 'delete'; //Do not localize
SelectAllStyleName = 'selectall'; //Do not localize
ContentStyleResourceName = 'content'; //Do not localize
SelectionStyleResourceName = 'selection'; //Do not localize
ForegroundStyleResourceName = 'foreground'; //Do not localize
FontStyleResourceName = 'font'; //Do not localize
CaretColorStyleResouceName = 'caretcolor'; //Do not localize
LeftSelectionPointStyleResourceName = 'leftselectionpoint'; //Do not localize
RightSelectionPointStyleResourceName = 'rightselectionpoint'; //Do not localize
{$IFDEF ANDROID}
function TextToLines(const Text: string): TStrings;
var
LText: string;
begin
Result := TStringList.Create;
LText := Text;
if LText.EndsWith(Result.LineBreak) and not LText.IsEmpty then
LText := LText + Result.LineBreak;
Result.Text := LText;
end;
{$ENDIF}
function RectsIntersect(const R1, R2: TRectF): Boolean;
begin
Result := (R1.Left <= R2.Right) and (R1.Right >= R2.Left) and (R1.Top <= R2.Bottom) and (R1.Bottom >= R2.Top);
end;
type
TStyledMemoHelper = class helper for TStyledMemo
procedure SelectionPointGestureHandler(Sender: TObject; const EventInfo: TGestureEventInfo; var Handled: Boolean);
end;
{ TStyledMemoHelper }
procedure TStyledMemoHelper.SelectionPointGestureHandler(Sender: TObject; const EventInfo: TGestureEventInfo; var Handled: Boolean);
begin
Handled := EventInfo.GestureID = igiPan;
end;
{ TStyledMemo }
function TStyledMemo.GetMemo: TCustomMemo;
begin
Result := PresentedControl as TCustomMemo;
end;
function TStyledMemo.GetModel: TCustomMemoModel;
begin
Result := inherited GetModel<TCustomMemoModel>;
end;
constructor TStyledMemo.Create(AOwner: TComponent);
var
PlatformTextService: IFMXTextService;
PlatformTextEditingBehaviorService: IFMXTextEditingService;
begin
inherited;
FLinesBackgroundColor := TDictionary<integer, TAlphaColor>.Create;
EnableExecuteAction := False;
if TPlatformServices.Current.SupportsPlatformService(IFMXTextService, PlatformTextService) then
FTextService := PlatformTextService.GetTextServiceClass.Create(Self, True)
else
FTextService := nil;
if not TPlatformServices.Current.SupportsPlatformService(ILoupeService, FLoupeService) then
FLoupeService := nil;
FLineObjects := TLines.Create(Self);
CreatePopupMenu;
FActionStack := TEditActionStack.Create(Self);
FLMouseSelecting := False;
FOldMPt := TPointF.Zero;
FCaretPosition := TCaretPosition.Zero;
if FTextService <> nil then
FTextService.ImeMode := TImeMode.imDontCare;
FSelStart := TCaretPosition.Zero;
FSelEnd := TCaretPosition.Zero;
FSelected := False;
FScrollToCaret := True;
CanFocus := False;
AutoCapture := True;
SetAcceptsControls(False);
//Timer to start scrolling when selecting text and cursor is out of content
FStartAutoScrollTimer := TTimer.Create(Self);
FStartAutoScrollTimer.Enabled := False;
FStartAutoScrollTimer.Interval := 150;
FStartAutoScrollTimer.OnTimer := StartAutoScrollHandler;
FAutoVScrollTimer := TTimer.Create(Self);
FAutoVScrollTimer.Interval := 20;
FAutoVScrollTimer.Enabled := False;
FAutoHScrollTimer := TTimer.Create(Self);
FAutoHScrollTimer.Interval := 20;
FAutoHScrollTimer.Enabled := False;
Touch.InteractiveGestures := Touch.InteractiveGestures + [TInteractiveGesture.DoubleTap, TInteractiveGesture.LongTap];
FSpellMenuItems := TList<TMenuItem>.Create;
FSpellFill := TBrush.Create(TBrushKind.Solid, TAlphaColorRec.Red);
FSpellUnderlineBrush := TStrokeBrush.Create(TBrushKind.Solid, TAlphaColorRec.Red);
FSpellUnderlineBrush.Dash := TStrokeDash.Dot;
FSpellUnderlineBrush.Thickness := 1;
FSpellingWords := TObjectList<TSpellingWord>.Create;
if TPlatformServices.Current.SupportsPlatformService(IFMXTextEditingService, PlatformTextEditingBehaviorService) then
begin
FDisableCaretInsideWords := TCaretBehavior.DisableCaretInsideWords in PlatformTextEditingBehaviorService.GetCaretBehaviors;
PlatformTextEditingBehaviorService := nil;
end
else
FDisableCaretInsideWords := False;
Width := 100;
end;
function TStyledMemo.DefineModelClass: TDataModelClass;
begin
Result := TCustomMemoModel;
end;
destructor TStyledMemo.Destroy;
begin
FLoupeService := nil;
FCursorFill.Free;
FActionStack.Free;
FMemoPopupMenu.Free;
FLineObjects.Free;
FTextService.Free;
FSpellService := nil;
FSpellMenuItems.Free;
FSpellingWords.Free;
FSpellFill.Free;
FSpellUnderlineBrush.Free;
FLinesBackgroundColor.Free;
inherited;
end;
procedure TStyledMemo.HideHighlightSpell;
begin
FSpellHightlightRect := TRectF.Empty;
Model.Caret.TemporarilyHidden := FSelected and (Model.SelLength > 0) and IsFocused;
RepaintEdit;
end;
procedure TStyledMemo.DoEndUpdate;
function IsLoading: Boolean;
begin
Result := csLoading in PresentedControl.ComponentState;
end;
function IsDestroying: Boolean;
begin
Result := csDestroying in PresentedControl.ComponentState;
end;
procedure RecalculateContextBounds;
begin
if not FLineObjects.IsUpdating and FLineObjects.FNeedUpdateContentSize then
FLineObjects.UpdateContentBounds(FLineObjects.FNewContentBounds);
end;
begin
inherited;
if not (IsUpdating or IsLoading or IsDestroying) then
begin
RecalculateContextBounds;
FLineObjects.RenderLayouts;
UpdateLinesPos;
CaretPosition := TCaretPosition.Create(EnsureRange(CaretPosition.Line, -1, Model.Lines.Count - 1), CaretPosition.Pos);
UpdateCaretPosition(True);
RepaintEdit;
end;
end;
procedure TStyledMemo.DoEnter;
{$IFDEF MSWINDOWS}
var
MouseService: IFMXMouseService;
MousePos: TPointF;
ContentRect: TRectF;
LCaretPosition: TCaretPosition;
{$ENDIF}
begin
inherited;
if Model.Lines.Count > 0 then
begin
FCaretPosition.Line := EnsureRange(FCaretPosition.Line, 0, Model.Lines.Count - 1);
FCaretPosition.Pos := EnsureRange(FCaretPosition.Pos, 0, Model.Lines[FCaretPosition.Line].Length);
end
else
FCaretPosition := TCaretPosition.Zero;
{$IFNDEF ANDROID}
if not FTextService.HasMarkedText then
begin
if Model.Lines.Count > 0 then
FTextService.Text := Model.Lines[FCaretPosition.Line]
else
FTextService.Text := string.Empty;
end;
{$IFDEF MSWINDOWS}
if FTextService.HasMarkedText and TPlatformServices.Current.SupportsPlatformService(IFMXMouseService, MouseService) then
try
MousePos := ScreenToLocal(MouseService.GetMousePos);
ContentRect := Model.ContentBounds;
MousePos.X := EnsureRange(MousePos.X, ContentRect.Left, ContentRect.Right);
MousePos.Y := EnsureRange(MousePos.Y, ContentRect.Top, ContentRect.Bottom);
MousePos.Offset(-ContentRect.TopLeft);
LCaretPosition := FLineObjects.GetPointPosition(MousePos, False);
FTextService.CaretPosition := TPoint.Create(LCaretPosition.Pos, LCaretPosition.Line);
IMEStateUpdated;
finally
MouseService := nil;
end;
{$ENDIF}
{$ELSE}
FTextService.Text := Model.Lines.Text;
{$ENDIF}
UpdateCaretPosition(False);
if Model.AutoSelect and not FTextService.HasMarkedText then
Memo.SelectAll;
end;
procedure TStyledMemo.DoExit;
begin
DoChange;
if Observers.IsObserving(TObserverMapping.EditLinkID) then
TLinkObservers.EditLinkUpdate(Observers);
if Observers.IsObserving(TObserverMapping.ControlValueID) then
TLinkObservers.ControlValueUpdate(Observers);
inherited;
UpdateSelectionPointPositions;
end;
procedure TStyledMemo.GotoLineBegin;
var
Point: TPointF;
begin
if Model.Lines.Count > 0 then
begin
Point := TPointF.Create(-ViewportPosition.X, Model.Caret.Pos.Y - ViewportPosition.Y +
GetLineHeight / 2);
CaretPosition := FLineObjects.GetPointPosition(Point);
end;
end;
procedure TStyledMemo.GotoLineEnd;
var
ContentRect: TRectF;
Point: TPointF;
begin
if Model.Lines.Count > 0 then
begin
ContentRect := TRectF.Create(0, 0, Model.ViewportSize.Width, Model.ViewportSize.Height);
if (CaretPosition.Line >= FLineObjects.Count) or
not RectsIntersect(ContentRect, FLineObjects[CaretPosition.Line].Rect) then
begin
FLineObjects.RenderLayouts;
UpdateCaretPosition(True);
end;
Point := TPointF.Create(FLineObjects[CaretPosition.Line].Rect.Right - 1,
Model.Caret.Pos.Y - ViewportPosition.Y + GetLineHeight / 2);
CaretPosition := FLineObjects.GetPointPosition(Point);
end;
end;
procedure TStyledMemo.GotoTextBegin;
begin
FCaretPosition := TCaretPosition.Zero;
FSelected := False;
UpdateSelectionInModel;
UpdateCaretPosition(True);
end;
procedure TStyledMemo.GotoTextEnd;
begin
if Model.Lines.Count = 0 then
FCaretPosition := TCaretPosition.Zero
else
FCaretPosition := TCaretPosition.Create(Model.Lines.Count - 1, Model.Lines[Model.Lines.Count - 1].Length);
FSelected := False;
UpdateSelectionInModel;
UpdateCaretPosition(True);
end;
function TStyledMemo.GetPositionPoint(const ACaretPos: TCaretPosition): TPointF;
var
Region: TRegion;
LineRect: TRectF;
Line: TLineObject;
begin
Region := FLineObjects.GetRegionForRange(ACaretPos.Line, ACaretPos.Pos, 1);
if Length(Region) > 0 then
begin
Line := FLineObjects[ACaretPos.Line];
LineRect := FLineObjects[ACaretPos.Line].Rect;
if Line.SizeValid then
Result := TPointF.Create(
EnsureRange(Region[0].Left, LineRect.Left, LineRect.Right),
EnsureRange(Region[0].Top, LineRect.Top, LineRect.Bottom))
else
Result := Region[0].Topleft;
Result.Offset(ViewportPosition);
end
else
Result := TPointF.Zero;
end;
procedure TStyledMemo.KeyDown(var Key: Word; var KeyChar: System.WideChar; Shift: TShiftState);
var
TmpS: string;
OldCaretPosition, LCaret: TCaretPosition;
WasSelection, IsCtrlOrCmd: Boolean;
LTmpOptions: TInsertOptions;
KeyHandled: Boolean;
begin
KeyHandled := False;
if Observers.IsObserving(TObserverMapping.EditLinkID) then
begin
if (Key = vkReturn) or (Key = vkBack) or (Key = vkDelete) or ((Key = vkInsert) and (ssShift in Shift)) then
if TLinkObservers.EditLinkEdit(Observers) then
TLinkObservers.EditLinkModified(Observers)
else
begin
TLinkObservers.EditLinkReset(Observers);
Exit;
end;
if (KeyChar >= #32) and not TLinkObservers.EditLinkIsValidChar(Observers, KeyChar) then
begin
KeyChar := #0;
Exit;
end;
case KeyChar of
^H, ^V, ^X, #32..High(Char):
if not TLinkObservers.EditLinkEdit(Observers) then
begin
KeyChar := #0;
TLinkObservers.EditLinkReset(Observers);
Exit;
end
else
TLinkObservers.EditLinkModified(Observers);
#27:
begin
TLinkObservers.EditLinkReset(Observers);
Memo.SelectAll;
KeyChar := #0;
Exit;
end;
end;
end;
if Observers.IsObserving(TObserverMapping.ControlValueID) and (KeyChar <> #0) then
TLinkObservers.ControlValueModified(Observers);
inherited KeyDown(Key, KeyChar, Shift);
OldCaretPosition := CaretPosition;
if (Key = vkReturn) and not (ssCommand in Shift) and not Model.ReadOnly then
begin
WasSelection := Model.SelLength > 0;
if WasSelection then
Model.DeleteFrom(GetSelBeg, Model.SelLength, [TDeleteOption.MoveCaret, TDeleteOption.CanUndo,
TDeleteOption.Selected]);
if WasSelection then
LTmpOptions := [TInsertOption.UndoPairedWithPrev]
else
LTmpOptions := [];
TmpS := Model.Lines.LineBreak;
Model.InsertAfter(CaretPosition, TmpS, LTmpOptions + [TInsertOption.MoveCaret, TInsertOption.CanUndo]);
Model.SelLength := 0;
Key := 0;
DoChange;
end;
IsCtrlOrCmd := Shift * [ssCtrl, ssCommand] <> [];
case Key of
vkA:
if IsCtrlOrCmd then
begin
Memo.SelectAll;
KeyHandled := True;
end;
vkC:
if IsCtrlOrCmd then
begin
Memo.CopyToClipboard;
KeyHandled := True;
end;
vkV:
if IsCtrlOrCmd then
begin
Memo.PasteFromClipboard;
KeyHandled := True;
end;
vkX:
if IsCtrlOrCmd and not Model.ReadOnly then
begin
Memo.CutToClipboard;
KeyHandled := True;
end;
vkZ:
if IsCtrlOrCmd then
begin
DoUndo(nil);
KeyHandled := True;
end;
vkEnd:
begin
if IsCtrlOrCmd then
GotoTextEnd
else
GotoLineEnd;
KeyHandled := True;
end;
vkHome:
begin
if IsCtrlOrCmd then
GotoTextBegin
else
GotoLineBegin;
KeyHandled := True;
end;
vkLeft:
begin
if IsCtrlOrCmd then
CaretPosition := GetPrevWordBegin(CaretPosition)
else
MoveCaretLeft;
KeyHandled := True;
end;
vkRight:
begin
if IsCtrlOrCmd then
CaretPosition := GetNextWordBegin(CaretPosition)
else
MoveCaretRight;
KeyHandled := True;
end;
vkUp:
begin
if IsCtrlOrCmd then
DoScroll(-1)
else
MoveCaretUp;
KeyHandled := True;
end;
vkDown:
begin
if IsCtrlOrCmd then
DoScroll(1)
else
MoveCaretDown;
KeyHandled := True;
end;
vkPrior:
begin
MoveCaretPageUp;
KeyHandled := True;
end;
vkNext:
begin
MoveCaretPageDown;
KeyHandled := True;
end;
vkDelete:
begin
if not Model.ReadOnly then
if Model.SelLength <> 0 then
begin
if ssShift in Shift then
Memo.CutToClipboard
else
Memo.DeleteSelection;
end
else if IsCtrlOrCmd then
Model.DeleteFrom(CaretPosition, Min(FMX.Text.GetLexemeEnd(Model.Lines[CaretPosition.Line],
CaretPosition.Pos), Model.Lines[CaretPosition.Line].Length) - CaretPosition.Pos + 1,
[TDeleteOption.CanUndo])
else if Model.Lines.Count > 0 then
begin
if (CaretPosition.Pos < Model.Lines[CaretPosition.Line].Length) and
Model.Lines[CaretPosition.Line].Chars[CaretPosition.Pos].IsHighSurrogate then
Model.DeleteFrom(CaretPosition, 2, [TDeleteOption.CanUndo])
else
Model.DeleteFrom(CaretPosition, 1, [TDeleteOption.CanUndo]);
end;
KeyHandled := True;
end;
vkBack:
begin
if not Model.ReadOnly then
if Model.SelLength <> 0 then
Memo.DeleteSelection
else if IsCtrlOrCmd then
begin
// Deleting whole word
LCaret := GetPrevWordBegin(CaretPosition);
if LCaret.IsInvalid then
Exit;
Model.DeleteFrom(LCaret, Model.PosToTextPos(CaretPosition) - Model.PosToTextPos(LCaret),
[TDeleteOption.MoveCaret, TDeleteOption.CanUndo]);
end
else
// Deleting single character
if Model.PosToTextPos(CaretPosition) > 0 then
begin
if (Model.Lines[CaretPosition.Line].Length > 0) and
Model.Lines[CaretPosition.Line].Chars[CaretPosition.Pos - 1].IsLowSurrogate then
Model.DeleteFrom(GetPositionShift(CaretPosition, -2), 2,
[TDeleteOption.MoveCaret, TDeleteOption.CanUndo])
else
Model.DeleteFrom(GetPositionShift(CaretPosition, -1), 1,
[TDeleteOption.MoveCaret, TDeleteOption.CanUndo]);
end;
KeyHandled := True;
end;
vkInsert:
begin
if IsCtrlOrCmd then
begin
Memo.CopyToClipboard;
KeyHandled := True;
end
else if [ssShift] * Shift <> [] then
begin
Memo.PasteFromClipboard;
KeyHandled := True;
end;
end;
end;
if (KeyChar <> #0) and not Model.ReadOnly then
begin
FCharsBuffer := FCharsBuffer + KeyChar;
if not KeyChar.IsHighSurrogate then
begin
WasSelection := Model.SelLength > 0;
if WasSelection then
Model.DeleteFrom(GetSelBeg, Model.SelLength, [TDeleteOption.MoveCaret, TDeleteOption.CanUndo]);
if WasSelection then
LTmpOptions := [TInsertOption.UndoPairedWithPrev]
else
LTmpOptions := [];
Model.InsertAfter(CaretPosition, FCharsBuffer, LTmpOptions + [TInsertOption.MoveCaret, TInsertOption.CanUndo,
TInsertOption.Typed]);
FCharsBuffer := string.Empty;
Model.SelLength := 0;
end;
KeyHandled := True;
end
else
begin
FCharsBuffer := string.Empty;
if (Key in [vkEnd, vkHome, vkLeft, vkRight, vkUp, vkDown, vkPrior, vkNext]) then
begin
if ssShift in Shift then
begin
if not FSelected then
SelectAtPos(OldCaretPosition);
SelectAtPos(CaretPosition);
end