david
8a7afe9221
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.DevExpressVCL@44 05c56307-c608-d34a-929d-697000501d7a
1948 lines
70 KiB
ObjectPascal
1948 lines
70 KiB
ObjectPascal
{********************************************************************}
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{ }
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{ Developer Express Visual Component Library }
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{ Express Cross Platform Library classes }
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{ }
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{ Copyright (c) 2000-2009 Developer Express Inc. }
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{ ALL RIGHTS RESERVED }
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{ }
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{ The entire contents of this file is protected by U.S. and }
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{ International Copyright Laws. Unauthorized reproduction, }
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{ reverse-engineering, and distribution of all or any portion of }
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{ the code contained in this file is strictly prohibited and may }
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{ result in severe civil and criminal penalties and will be }
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{ prosecuted to the maximum extent possible under the law. }
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{ }
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{ RESTRICTIONS }
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{ }
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{ THIS SOURCE CODE AND ALL RESULTING INTERMEDIATE FILES }
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{ (DCU, OBJ, DLL, ETC.) ARE CONFIDENTIAL AND PROPRIETARY TRADE }
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{ SECRETS OF DEVELOPER EXPRESS INC. THE REGISTERED DEVELOPER IS }
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{ LICENSED TO DISTRIBUTE THE EXPRESSCROSSPLATFORMLIBRARY AND ALL }
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{ ACCOMPANYING VCL CONTROLS AS PART OF AN EXECUTABLE PROGRAM }
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{ ONLY. }
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{ }
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{ THE SOURCE CODE CONTAINED WITHIN THIS FILE AND ALL RELATED }
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{ FILES OR ANY PORTION OF ITS CONTENTS SHALL AT NO TIME BE }
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{ COPIED, TRANSFERRED, SOLD, DISTRIBUTED, OR OTHERWISE MADE }
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{ AVAILABLE TO OTHER INDIVIDUALS WITHOUT EXPRESS WRITTEN CONSENT }
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{ AND PERMISSION FROM DEVELOPER EXPRESS INC. }
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{ }
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{ CONSULT THE END USER LICENSE AGREEMENT FOR INFORMATION ON }
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{ ADDITIONAL RESTRICTIONS. }
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{ }
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{********************************************************************}
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unit cxDrawTextUtils;
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{$I cxVer.inc}
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interface
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uses
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Windows, Controls,
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{$IFDEF DELPHI6}
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Types,
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{$ELSE}
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Classes,
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{$ENDIF}
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SysUtils, Graphics;
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const
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CXTO_LEFT = $00000000;
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CXTO_CENTER_HORIZONTALLY = $00000001;
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CXTO_RIGHT = $00000002;
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CXTO_JUSTIFY_HORIZONTALLY = $00000003;
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CXTO_DISTRIBUTE_HORIZONTALLY = $00000004;
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CXTO_TOP = $00000000;
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CXTO_CENTER_VERTICALLY = $00000010;
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CXTO_BOTTOM = $00000020;
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CXTO_DISTRIBUTE_VERTICALLY = $00000030;
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CXTO_WORDBREAK = $00000100;
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CXTO_SINGLELINE = $00000200;
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CXTO_EXPANDTABS = $00000400;
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CXTO_END_ELLIPSIS = $00000800;
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CXTO_PATTERNEDTEXT = $00001000;
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CXTO_EXTERNALLEADING = $00002000;
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CXTO_EDITCONTROL = $00004000;
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CXTO_NOCLIP = $00008000;
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CXTO_AUTOINDENTS = $00010000;
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CXTO_CHARBREAK = $00020000;
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CXTO_PREVENT_LEFT_EXCEED = $00040000;
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CXTO_PREVENT_TOP_EXCEED = $00080000;
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CXTO_CALCRECT = $00100000;
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CXTO_CALCROWCOUNT = $00200000;
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CXTO_NOPREFIX = $00000000;
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CXTO_HIDEPREFIX = $01000000;
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CXTO_EXCELSTYLE = $02000000;
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CXTO_DEFAULT_FORMAT = CXTO_LEFT or CXTO_TOP or CXTO_SINGLELINE;
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cxTextSpace = 2;
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TcxCacheStaticRowsCount = 32;
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cxMinVisuallyVisibleTextHeight = 6;
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type
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TCaptionChar = Char;
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TcxCaptionChar = TCaptionChar;
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PcxCaptionChar = PChar;
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TcxTextOutFormat = DWORD;
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TcxTextAlignX = (taLeft, taCenterX, taRight, taJustifyX, taDistributeX);
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TcxTextAlignY = (taTop, taCenterY, taBottom, taDistributeY);
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TcxVerticalTextOutDirection = (vtdTopToBottom, vtdBottomToTop);
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PcxTextParams = ^TcxTextParams;
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TcxTextParams = packed record
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RowHeight: Integer;
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tmExternalLeading: Integer;
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FullRowHeight: Integer;
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EndEllipsisWidth: Integer;
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Bold: Boolean;
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BreakChar: WideChar;
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TextAlignX: TcxTextAlignX;
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TextAlignY: TcxTextAlignY;
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WordBreak: Boolean;
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SingleLine: Boolean;
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ExpandTabs: Boolean;
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EndEllipsis: Boolean;
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ExternalLeading: Boolean;
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EditControl: Boolean;
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ExcelStyle: Boolean;
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NoClip: Boolean;
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AutoIndents: Boolean;
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PatternedText: Boolean;
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PreventLeftExceed: Boolean;
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PreventTopExceed: Boolean;
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CharBreak: Boolean;
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CalcRowCount: Boolean;
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CalcRect: Boolean;
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MaxCharWidth: Integer;
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CharSet: Byte;
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OnePixel: Integer;
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HidePrefix: Boolean;
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end;
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TcxTextRow = record
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Text: PWideChar;
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TextLength: Integer;
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TextExtents: TSize;
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BreakCount: Integer;
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TextOriginX: Integer;
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TextOriginY: Integer;
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StartOffset: Integer;
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end;
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PcxTextRow = ^TcxTextRow;
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TCanvasHandle = HDC;
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TcxDynamicTextRows = array of TcxTextRow;
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TcxCalcTextExtentsProc = function (AHandle: TCanvasHandle; AText: PWideChar;
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ATextLength: Integer; AExpandTabs: Boolean; AData: Pointer): TSize;
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TcxTextRows = record
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Count: Integer;
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Text: WideString;
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StaticRows: array[0..TcxCacheStaticRowsCount - 1] of TcxTextRow;
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DynamicRows: TcxDynamicTextRows;
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end;
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function cxCalcTextParams(AHandle: TCanvasHandle; AFormat: DWORD;
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const ALineSpacingFactor: Double = 1.0): TcxTextParams; overload;
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function cxCalcTextParams(ACanvas: TCanvas; AFormat: DWORD;
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const ALineSpacingFactor: Double = 1.0): TcxTextParams; overload;
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function cxCalcTextExtents(AHandle: TCanvasHandle; AText: PWideChar;
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ATextLength: Integer; AExpandTabs: Boolean): TSize; overload;
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function cxCalcTextExtents(AHandle: TCanvasHandle; AText: PAnsiChar;
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ATextLength: Integer; AExpandTabs: Boolean): TSize; overload;
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function cxCalcTextExtentsEx(AHandle: TCanvasHandle; AText: PWideChar;
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ATextLength: Integer; AExpandTabs: Boolean; AData: Pointer): TSize; overload;
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procedure cxCalcTextRowExtents(AHandle: TCanvasHandle; ATextRow: PcxTextRow;
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const ATextParams: TcxTextParams); overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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procedure cxCalcTextRowExtents(AHandle: TCanvasHandle; ATextRow: PcxTextRow;
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const ATextParams: TcxTextParams; AUserData: Pointer;
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ACalcTextExtentsProc: TcxCalcTextExtentsProc); overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxGetLongestTextRowWidth(const ATextRows: TcxTextRows; ARowCount: Integer): Integer;
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procedure cxPlaceTextRows(AHandle: TCanvasHandle; const R: TRect;
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var ATextParams: TcxTextParams; const ATextRows: TcxTextRows; ARowCount: Integer);
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procedure cxResetTextRows(var ATextRows: TcxTextRows); {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxGetTextRow(const ATextRows: TcxTextRows; AIndex: Integer): PcxTextRow; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxGetTextRowCount(const ATextRows: TcxTextRows): Integer; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxMakeFormat(ATextAlignX: TcxTextAlignX; ATextAlignY: TcxTextAlignY): DWORD;
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function cxPrepareRect(const R: TRect; const ATextParams: TcxTextParams;
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ALeftIndent, ARightIndent: Integer): TRect;
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function cxGetIsWordDelimeter(ACodePage: DWORD; AChar: WideChar): Boolean;
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function cxGetNextWordBreak(ACodePage: DWORD; AStart, AEnd: PWideChar): PWideChar;
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procedure cxTextRowsOutHighlight(AHandle: TCanvasHandle; const R: TRect;
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const ATextParams: TcxTextParams; const ATextRows: TcxTextRows; ARowCount,
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ASelStart, ASelLength: Integer; ASelBkgColor, ASelTextColor: TColor; AForceEndEllipsis: Boolean);
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//***************************** ANSI VERSION ***********************************
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function cxMakeTextRows(AHandle: TCanvasHandle;
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AText: PAnsiChar; ATextLength: Integer;
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const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
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out ACount: Integer; AMaxLineCount: Integer; AUserData: Pointer;
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ACalcTextExtentsProc: TcxCalcTextExtentsProc): Boolean; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxMakeTextRows(AHandle: TCanvasHandle;
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AText: PAnsiChar; ATextLength: Integer;
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const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
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out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxMakeTextRows(ACanvas: TCanvas;
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AText: PAnsiChar; ATextLength: Integer;
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const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
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out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(AHandle: TCanvasHandle; const AText: AnsiString; var R: TRect;
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AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
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ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0;
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ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
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ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(AHandle: TCanvasHandle; const AText: AnsiString; var R: TRect;
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AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
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AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
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ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(ACanvas: TCanvas; const AText: AnsiString; var R: TRect;
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AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
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ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0;
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ARightIndent: Integer = 0; ATextColor: TColor = clDefault;
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const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(ACanvas: TCanvas; const AText: AnsiString; var R: TRect;
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AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
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AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
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ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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procedure cxRotatedTextOut(AHandle: TCanvasHandle; const ABounds: TRect; const AText: AnsiString; AFont: TFont;
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AAlignHorz: TcxTextAlignX = taCenterX; AAlignVert: TcxTextAlignY = taCenterY; AWordBreak: Boolean = True;
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ALeftExceed: Boolean = True; ARightExceed: Boolean = True; ADirection: TcxVerticalTextOutDirection = vtdBottomToTop;
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AFontSize: Integer = 0); overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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//**************************** UNICODE VERSION *********************************
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function cxMakeTextRows(AHandle: TCanvasHandle;
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AText: PWideChar; ATextLength: Integer;
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const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
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out ACount: Integer; AMaxLineCount: Integer; AUserData: Pointer;
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ACalcTextExtentsProc: TcxCalcTextExtentsProc): Boolean; overload;
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function cxMakeTextRows(AHandle: TCanvasHandle;
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AText: PWideChar; ATextLength: Integer;
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const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
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out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxMakeTextRows(ACanvas: TCanvas;
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AText: PWideChar; ATextLength: Integer;
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const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
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out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(AHandle: TCanvasHandle; const AText: WideString; var R: TRect;
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AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
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ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0;
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ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
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ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload;
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function cxTextOut(AHandle: TCanvasHandle; const AText: WideString; var R: TRect;
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AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
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AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
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ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(ACanvas: TCanvas; const AText: WideString; var R: TRect;
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AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
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ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0;
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ARightIndent: Integer = 0; ATextColor: TColor = clDefault;
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const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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function cxTextOut(ACanvas: TCanvas; const AText: WideString; var R: TRect;
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AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
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AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
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ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
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procedure cxRotatedTextOut(AHandle: TCanvasHandle; const ABounds: TRect; const AText: WideString; AFont: TFont;
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AAlignHorz: TcxTextAlignX = taCenterX; AAlignVert: TcxTextAlignY = taCenterY; AWordBreak: Boolean = True;
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ALeftExceed: Boolean = True; ARightExceed: Boolean = True; ADirection: TcxVerticalTextOutDirection = vtdBottomToTop;
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AFontSize: Integer = 0); overload;
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implementation
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uses
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Math, Classes, cxGeometry, dxCore, cxClasses, cxGraphics, cxControls;
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type
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TCanvasAccess = class(TControlCanvas);
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TFullWidthUnicode = record
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Start, Finish: WideChar;
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end;
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const
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CXTO_VERT_ALIGN_OFFSET = 4;
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CXTO_HORZ_ALIGN_MASK = CXTO_CENTER_HORIZONTALLY or CXTO_RIGHT or CXTO_JUSTIFY_HORIZONTALLY or CXTO_DISTRIBUTE_HORIZONTALLY;
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CXTO_VERT_ALIGN_MASK = CXTO_CENTER_VERTICALLY or CXTO_BOTTOM or CXTO_DISTRIBUTE_VERTICALLY;
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Tab = #9;
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LF = #10;
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CR = #13;
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Space = #32;
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cxEndEllipsisChars: PWideChar = '...';
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cxEndEllipsisCharsLength = 3;
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type
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TcxTextRowFormat = record
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Align: TcxTextAlignX;
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BreakByWords: Boolean;
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BreakByChars: Boolean;
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CalcRect: Boolean;
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EditControl: Boolean;
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EndEllipsis: Boolean;
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ExpandTabs: Boolean;
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ExcelStyle: Boolean;
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SingleLine: Boolean;
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Special: Boolean;
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end;
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var
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FillPatterns: array[Boolean] of HBRUSH;
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//work with cache
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procedure cxResetTextRows(var ATextRows: TcxTextRows);
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begin
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ATextRows.Count := 0;
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SetLength(ATextRows.DynamicRows, 0);
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ATextRows.DynamicRows := nil;
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//don't clear ATextRows.Text here
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end;
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procedure ValidateTextRows(var ATextRows: TcxTextRows; ACount: Integer);
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var
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AIndex: Integer;
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begin
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AIndex := ACount - 1;
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ATextRows.Count := ACount;
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Dec(ACount, TcxCacheStaticRowsCount);
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if ACount > Length(ATextRows.DynamicRows) then
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SetLength(ATextRows.DynamicRows, ACount + 4);
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if AIndex >= 0 then
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FillChar(cxGetTextRow(ATextRows, AIndex)^, SizeOf(TcxTextRow), 0);
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end;
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function cxGetTextRow(const ATextRows: TcxTextRows; AIndex: Integer): PcxTextRow;
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begin
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if AIndex < TcxCacheStaticRowsCount then
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Result := @ATextRows.StaticRows[AIndex]
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else
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begin
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Dec(AIndex, TcxCacheStaticRowsCount);
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Result := @ATextRows.DynamicRows[AIndex];
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end;
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end;
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function cxGetTextRowCount(const ATextRows: TcxTextRows): Integer;
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begin
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Result := ATextRows.Count;
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end;
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function cxMakeFormat(ATextAlignX: TcxTextAlignX; ATextAlignY: TcxTextAlignY): DWORD;
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begin
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Result := Byte(ATextAlignX) or (Byte(ATextAlignY) shl CXTO_VERT_ALIGN_OFFSET);
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end;
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//support Win9x & WinMe
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function cxWideCharLenToAnsiString(AText: PWideChar; ATextLength: Integer): AnsiString;
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var
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AAnsiTextLength: Integer;
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begin
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AAnsiTextLength := WideCharToMultiByte(CP_ACP, 0, AText, ATextLength, nil, 0, nil, nil);
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SetLength(Result, AAnsiTextLength);
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WideCharToMultiByte(CP_ACP, 0, AText, ATextLength, PAnsiChar(Result), AAnsiTextLength, nil, nil);
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end;
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function cxGetTabbedTextExtentW(hDC: HDC; lpString: PWideChar;
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nCount, nTabPositions: Integer; var lpnTabStopPositions): DWORD;
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var
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S: AnsiString;
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begin
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if IsWinNT then
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Result := GetTabbedTextExtentW(hDC, lpString, nCount, nTabPositions, lpnTabStopPositions)
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else
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begin
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S := cxWideCharLenToAnsiString(lpString, nCount);
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Result := GetTabbedTextExtentA(hDC, PAnsiChar(S), Length(S), nTabPositions, lpnTabStopPositions);
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end;
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end;
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function cxGetTextExtentPoint32W(DC: HDC; Str: PWideChar; Count: Integer; var Size: TSize): BOOL;
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var
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S: AnsiString;
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begin
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if IsWinNT then
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Result := GetTextExtentPoint32W(DC, Str, Count, Size)
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else
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begin
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S := cxWideCharLenToAnsiString(Str, Count);
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Result := GetTextExtentPoint32A(DC, PAnsiChar(S), Length(S), Size);
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end;
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end;
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function cxGetTextExtentExPoint(AHandle: TCanvasHandle; AText: PWideChar;
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ATextLength, AWidth: Integer; ACharNumber, ADX: PInteger): Boolean;
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var
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S: AnsiString;
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ASize: TSize;
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begin
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if IsWinNT then
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Result := GetTextExtentExPointW(AHandle, AText, ATextLength, AWidth, ACharNumber, ADX, ASize)
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else
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begin
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S := cxWideCharLenToAnsiString(AText, ATextLength);
|
|
Result := GetTextExtentExPointA(AHandle, PAnsiChar(S), Length(S), AWidth, ACharNumber, ADX, ASize);
|
|
end;
|
|
end;
|
|
|
|
function cxDrawTextW(hDC: HDC; lpString: PWideChar; nCount: Integer;
|
|
var lpRect: TRect; uFormat: UINT): Integer;
|
|
var
|
|
S: AnsiString;
|
|
begin
|
|
if IsWinNT then
|
|
Result := DrawTextW(hDC, lpString, nCount, lpRect, uFormat)
|
|
else
|
|
begin
|
|
S := cxWideCharLenToAnsiString(lpString, nCount);
|
|
Result := DrawTextA(hDC, PAnsiChar(S), Length(S), lpRect, uFormat);
|
|
end;
|
|
end;
|
|
|
|
function cxTabbedTextOutW(hDC: HDC; X, Y: Integer; lpString: PWideChar;
|
|
nCount, nTabPositions: Integer; var lpnTabStopPositions; nTabOrigin: Integer): Longint;
|
|
var
|
|
S: AnsiString;
|
|
begin
|
|
if IsWinNT then
|
|
Result := TabbedTextOutW(hDC, X, Y, lpString, nCount, nTabPositions, lpnTabStopPositions, nTabOrigin)
|
|
else
|
|
begin
|
|
S := cxWideCharLenToAnsiString(lpString, nCount);
|
|
Result := TabbedTextOutA(hDC, X, Y, PAnsiChar(S), Length(S), nTabPositions, lpnTabStopPositions, nTabOrigin);
|
|
end;
|
|
end;
|
|
|
|
function cxTextOutW(DC: HDC; X, Y: Integer; Str: PWideChar; Count: Integer): BOOL;
|
|
var
|
|
S: AnsiString;
|
|
begin
|
|
if IsWinNT then
|
|
Result := TextOutW(DC, X, Y, Str, Count)
|
|
else
|
|
begin
|
|
S := cxWideCharLenToAnsiString(Str, Count);
|
|
Result := TextOutA(DC, X, Y, PAnsiChar(S), Length(S));
|
|
end;
|
|
end;
|
|
|
|
function cxExtTextOutW(DC: HDC; X, Y: Integer; Options: Longint;
|
|
Rect: PRect; Str: PWideChar; Count: Longint; Dx: PInteger): BOOL;
|
|
var
|
|
S: AnsiString;
|
|
begin
|
|
if IsWinNT then
|
|
Result := ExtTextOutW(DC, X, Y, Options, Rect, Str, Count, Dx)
|
|
else
|
|
begin
|
|
S := cxWideCharLenToAnsiString(Str, Count);
|
|
Result := ExtTextOutA(DC, X, Y, Options, Rect, PAnsiChar(S), Length(S), Dx);
|
|
end;
|
|
end;
|
|
|
|
function cxCalcTextExtents(AHandle: TCanvasHandle; AText: PWideChar;
|
|
ATextLength: Integer; AExpandTabs: Boolean): TSize;
|
|
var
|
|
ATextExtent: DWORD;
|
|
R: TRect;
|
|
begin
|
|
if AExpandTabs then
|
|
begin
|
|
if ATextLength < 4096 then
|
|
begin
|
|
ATextExtent := cxGetTabbedTextExtentW(AHandle, AText, ATextLength, 0, Result);
|
|
Result.cx := LoWord(ATextExtent);
|
|
Result.cy := HiWord(ATextExtent);
|
|
end
|
|
else
|
|
begin
|
|
R := cxEmptyRect;
|
|
Result.cy := cxDrawTextW(AHandle, AText, ATextLength, R,
|
|
DT_SINGLELINE or DT_NOPREFIX or DT_CALCRECT or DT_EXPANDTABS);
|
|
Result.cx := R.Right - R.Left;
|
|
end;
|
|
end
|
|
else
|
|
cxGetTextExtentPoint32W(AHandle, AText, ATextLength, Result);
|
|
end;
|
|
|
|
function cxCalcTextExtents(AHandle: TCanvasHandle; AText: PAnsiChar;
|
|
ATextLength: Integer; AExpandTabs: Boolean): TSize;
|
|
var
|
|
ATextExtent: DWORD;
|
|
R: TRect;
|
|
begin
|
|
if AExpandTabs then
|
|
begin
|
|
if ATextLength <= 4096 then
|
|
begin
|
|
ATextExtent := GetTabbedTextExtentA(AHandle, AText, ATextLength, 0, Result);
|
|
Result.cx := LoWord(ATextExtent);
|
|
Result.cy := HiWord(ATextExtent);
|
|
end
|
|
else
|
|
begin
|
|
R := cxEmptyRect;
|
|
Result.cy := DrawTextA(AHandle, AText, ATextLength, R,
|
|
DT_SINGLELINE or DT_NOPREFIX or DT_CALCRECT or DT_EXPANDTABS);
|
|
Result.cx := R.Right - R.Left;
|
|
end;
|
|
end
|
|
else
|
|
GetTextExtentPoint32A(AHandle, AText, ATextLength, Result);
|
|
end;
|
|
|
|
function IntersectClipRect(AHandle: TCanvasHandle; const R: TRect): HRGN;
|
|
begin
|
|
Result := CreateRectRgn(0, 0, 0, 0);
|
|
if GetClipRgn(AHandle, Result) <> 1 then
|
|
begin
|
|
DeleteObject(Result);
|
|
Result := 0;
|
|
end;
|
|
with R do
|
|
Windows.IntersectClipRect(AHandle, Left, Top, Right, Bottom);
|
|
end;
|
|
|
|
procedure RestoreClipRgn(AHandle: TCanvasHandle; var ARgn: HRGN);
|
|
begin
|
|
SelectClipRgn(AHandle, ARgn);
|
|
if ARgn <> 0 then
|
|
begin
|
|
DeleteObject(ARgn);
|
|
ARgn := 0
|
|
end;
|
|
end;
|
|
|
|
function cxCalcTextExtentsEx(AHandle: TCanvasHandle; AText: PWideChar;
|
|
ATextLength: Integer; AExpandTabs: Boolean; AData: Pointer): TSize;
|
|
begin
|
|
Result := cxCalcTextExtents(AHandle, AText, ATextLength, AExpandTabs);
|
|
end;
|
|
|
|
procedure cxCalcTextRowExtents(AHandle: TCanvasHandle; ATextRow: PcxTextRow;
|
|
const ATextParams: TcxTextParams);
|
|
begin
|
|
cxCalcTextRowExtents(AHandle, ATextRow, ATextParams, nil, @cxCalcTextExtentsEx);
|
|
end;
|
|
|
|
procedure cxCalcTextRowExtents(AHandle: TCanvasHandle; ATextRow: PcxTextRow;
|
|
const ATextParams: TcxTextParams; AUserData: Pointer;
|
|
ACalcTextExtentsProc: TcxCalcTextExtentsProc); overload; {$IFDEF DELPHI9} inline; {$ENDIF}
|
|
begin
|
|
with ATextRow^ do
|
|
TextExtents := ACalcTextExtentsProc(AHandle, Text, TextLength,
|
|
ATextParams.ExpandTabs, AUserData);
|
|
end;
|
|
|
|
function cxCalcTextParams(AHandle: TCanvasHandle; AFormat: TcxTextOutFormat;
|
|
const ALineSpacingFactor: Double = 1.0): TcxTextParams;
|
|
var
|
|
ATextMetricW: TTextMetricW;
|
|
ATextMetricA: TTextMetricA;
|
|
R: TRect;
|
|
begin
|
|
FillChar(Result, SizeOf(Result), 0);
|
|
with Result do
|
|
begin
|
|
if GetTextMetricsW(AHandle, ATextMetricW) then
|
|
begin
|
|
Bold := ATextMetricW.tmWeight >= FW_BOLD;
|
|
BreakChar := ATextMetricW.tmBreakChar;
|
|
MaxCharWidth := ATextMetricW.tmMaxCharWidth;
|
|
RowHeight := ATextMetricW.tmHeight;
|
|
CharSet := ATextMetricW.tmCharSet;
|
|
if ExternalLeading then
|
|
tmExternalLeading := ATextMetricW.tmExternalLeading;
|
|
end
|
|
else
|
|
begin
|
|
GetTextMetricsA(AHandle, ATextMetricA);
|
|
Bold := ATextMetricA.tmWeight >= FW_BOLD;
|
|
BreakChar := WideChar(ATextMetricA.tmBreakChar);
|
|
MaxCharWidth := ATextMetricA.tmMaxCharWidth;
|
|
RowHeight := ATextMetricA.tmHeight;
|
|
CharSet := ATextMetricA.tmCharSet;
|
|
if ExternalLeading then
|
|
tmExternalLeading := ATextMetricA.tmExternalLeading;
|
|
end;
|
|
TextAlignX := TcxTextAlignX(AFormat and CXTO_HORZ_ALIGN_MASK);
|
|
TextAlignY := TcxTextAlignY(AFormat and CXTO_VERT_ALIGN_MASK shr CXTO_VERT_ALIGN_OFFSET);
|
|
AutoIndents := AFormat and CXTO_AUTOINDENTS <> 0;
|
|
CalcRect := AFormat and CXTO_CALCRECT <> 0;
|
|
CalcRowCount := AFormat and CXTO_CALCROWCOUNT <> 0;
|
|
CharBreak := (AFormat and CXTO_CHARBREAK <> 0) or SysLocale.FarEast; //SysLocale.FarEast ??
|
|
EditControl := AFormat and CXTO_EDITCONTROL <> 0;
|
|
EndEllipsis := AFormat and CXTO_END_ELLIPSIS <> 0;
|
|
ExcelStyle := AFormat and CXTO_EXCELSTYLE <> 0;
|
|
ExpandTabs := AFormat and CXTO_EXPANDTABS <> 0;
|
|
ExternalLeading := AFormat and CXTO_EXTERNALLEADING <> 0;
|
|
NoClip := AFormat and CXTO_NOCLIP <> 0;
|
|
PatternedText := AFormat and CXTO_PATTERNEDTEXT <> 0;
|
|
PreventLeftExceed := AFormat and CXTO_PREVENT_LEFT_EXCEED <> 0;
|
|
PreventTopExceed := AFormat and CXTO_PREVENT_TOP_EXCEED <> 0;
|
|
SingleLine := AFormat and CXTO_SINGLELINE <> 0;
|
|
WordBreak := AFormat and CXTO_WORDBREAK <> 0;
|
|
HidePrefix := AFormat and CXTO_HIDEPREFIX <> 0;
|
|
R := Rect(0, 0, 1, 1);
|
|
DPtoLP(AHandle, R, 2);
|
|
OnePixel := R.Right - R.Left;
|
|
FullRowHeight := Round((RowHeight + tmExternalLeading) * ALineSpacingFactor);
|
|
|
|
if PatternedText then
|
|
begin
|
|
R := Rect(0, 0, cxMinVisuallyVisibleTextHeight, cxMinVisuallyVisibleTextHeight);
|
|
DPtoLP(AHandle, R, 2);
|
|
PatternedText := RowHeight < R.Bottom - R.Top;
|
|
end;
|
|
|
|
if EndEllipsis then
|
|
EndEllipsisWidth := cxCalcTextExtents(AHandle, cxEndEllipsisChars, cxEndEllipsisCharsLength, False).cX
|
|
else
|
|
EndEllipsisWidth := 0;
|
|
end;
|
|
end;
|
|
|
|
function cxCalcTextParams(ACanvas: TCanvas; AFormat: DWORD;
|
|
const ALineSpacingFactor: Double = 1.0): TcxTextParams;
|
|
begin
|
|
TCanvasAccess(ACanvas).RequiredState([csHandleValid, csFontValid]);
|
|
Result := cxCalcTextParams(ACanvas.Handle, AFormat, ALineSpacingFactor);
|
|
end;
|
|
|
|
function IsFarEastLineBreak(C: WideChar): Boolean;
|
|
const
|
|
ASCIILatin1EndBreak: array[0..150] of Byte = (
|
|
1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
|
|
1, 0, 0, 0, 0, 0, 0, 1);
|
|
GeneralPunctuationEndBreak: array[0..32] of Byte = (
|
|
1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0,
|
|
0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 1, 1);
|
|
CJKSymbolEndBreak: array[0..29] of Byte = (
|
|
1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1,
|
|
0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1);
|
|
CNS11643SmallVariantsEndBreak: array[0..46] of Byte = (
|
|
1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
|
|
1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
|
|
1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1);
|
|
FullWidthHalfWidthVariantsEndBreak: array[0..158] of Byte = (
|
|
1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,
|
|
0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1);
|
|
|
|
begin
|
|
case Ord(C) shr 8 of
|
|
$0000:
|
|
Result := (C >= #$0021) and (C <= #$00B7) and Boolean(ASCIILatin1EndBreak[Ord(C) - $0021]);
|
|
$0002:
|
|
Result := (C = #$02C7) or (C = #$02C9);
|
|
$0020:
|
|
Result := (C >= #$2013) and (C <= #$2033) and Boolean(GeneralPunctuationEndBreak[Ord(C) - $2013]);
|
|
$0021:
|
|
Result := C = #$2103;
|
|
$0022:
|
|
Result := C = #$2236;
|
|
$0025:
|
|
Result := C = #$2574;
|
|
$0030:
|
|
begin
|
|
if (C >= #$3001) and (C <= #$301E) then
|
|
Result := Boolean(CJKSymbolEndBreak[Ord(C) - $3001])
|
|
else
|
|
Result := (C = #$309B) or (C = #$309C);
|
|
end;
|
|
$00FE:
|
|
Result := (C >= #$FE30) and (C <= #$FE5E) and Boolean(CNS11643SmallVariantsEndBreak[Ord(C) - $FE30]);
|
|
$00FF:
|
|
begin
|
|
if (C >= #$FF01) and (C <= #$FF9F) then
|
|
Result := Boolean(FullWidthHalfWidthVariantsEndBreak[Ord(C) - $FF01])
|
|
else
|
|
Result := C >= #$FFE0;
|
|
end
|
|
else
|
|
Result := False;
|
|
end;
|
|
end;
|
|
|
|
function IsFarEastFullWidthCharacter(ACodePage: DWORD; AChar: WideChar): Boolean;
|
|
const
|
|
NUM_FULLWIDTH_UNICODES = 4;
|
|
FullWidthUnicodes: array[0..NUM_FULLWIDTH_UNICODES - 1] of TFullWidthUnicode = (
|
|
(Start: #$4E00; Finish: #$9FFF), // CJK_UNIFIED_IDOGRAPHS
|
|
(Start: #$3040; Finish: #$309F), // HIRAGANA
|
|
(Start: #$30A0; Finish: #$30FF), // KATAKANA
|
|
(Start: #$AC00; Finish: #$D7A3) // HANGUL
|
|
);
|
|
|
|
var
|
|
I: Integer;
|
|
begin
|
|
if AChar < #$0080 then
|
|
begin
|
|
Result := False;
|
|
Exit;
|
|
end;
|
|
for I := 0 to NUM_FULLWIDTH_UNICODES - 1 do
|
|
if (AChar >= FullWidthUnicodes[I].Start) and (AChar <= FullWidthUnicodes[I].Finish) then
|
|
begin
|
|
Result := True;
|
|
Exit;
|
|
end;
|
|
Result := WideCharToMultiByte(ACodePage, 0, @AChar, 1, nil, 0, nil, nil) > 1;
|
|
end;
|
|
|
|
function cxGetIsWordDelimeter(ACodePage: DWORD; AChar: WideChar): Boolean;
|
|
begin
|
|
Result := (AChar = CR) or (AChar = LF) or (AChar = Tab) or (AChar = Space) or
|
|
IsFarEastFullWidthCharacter(ACodePage, AChar) or IsFarEastLineBreak(AChar);
|
|
end;
|
|
|
|
function cxGetNextWordBreak(ACodePage: DWORD; AStart, AEnd: PWideChar): PWideChar;
|
|
var
|
|
ANonWhite: Integer;
|
|
begin
|
|
ANonWhite := 1;
|
|
while AStart < AEnd do
|
|
case AStart^ of
|
|
CR, LF:
|
|
Break;
|
|
Tab, Space:
|
|
begin
|
|
Result := AStart + ANonWhite;
|
|
Exit;
|
|
end;
|
|
else
|
|
begin
|
|
if IsFarEastFullWidthCharacter(ACodePage, AStart^) then
|
|
begin
|
|
if ANonWhite = 0 then
|
|
Result := AStart
|
|
else
|
|
if (AStart + 1 <> AEnd) and IsFarEastLineBreak((AStart + 1)^) then
|
|
Result := AStart + 1 + 1
|
|
else
|
|
Result := AStart + 1;
|
|
Exit;
|
|
end;
|
|
Inc(AStart);
|
|
ANonWhite := 0;
|
|
end;
|
|
end;
|
|
Result := AStart;
|
|
end;
|
|
|
|
function BreakAWord(AHandle: TCanvasHandle; AText: PWideChar;
|
|
ATextLength, AWidth: Integer; AExpandTabs: Boolean): PWideChar;
|
|
var
|
|
ALow, AHigh, ANew: Integer;
|
|
begin
|
|
ALow := 0;
|
|
AHigh := ATextLength;
|
|
while (AHigh - ALow) > 1 do
|
|
begin
|
|
ANew := ALow + (AHigh - ALow) div 2;
|
|
if cxCalcTextExtents(AHandle, AText, ANew, AExpandTabs).cx > AWidth then
|
|
AHigh := ANew
|
|
else
|
|
ALow := ANew;
|
|
end;
|
|
if (ALow = 0) and (ATextLength > 0) then
|
|
ALow := 1;
|
|
Result := AText + ALow;
|
|
end;
|
|
|
|
function AdjustWhiteSpaces(ANextLine: PWideChar; var ACount: Integer; AAlign: TcxTextAlignX): PWideChar;
|
|
begin
|
|
case AAlign of
|
|
taLeft:
|
|
if (ANextLine^ = Space) or (ANextLine^ = Tab) then
|
|
Inc(ANextLine);
|
|
taRight:
|
|
if ((ANextLine - 1)^ = Space) or ((ANextLine - 1)^ = Tab) then
|
|
Dec(ACount);
|
|
taCenterX:
|
|
begin
|
|
if ((ANextLine - 1)^ = Space) or ((ANextLine - 1)^ = Tab) then
|
|
Dec(ACount);
|
|
if (ANextLine^ = Space) or (ANextLine^ = Tab) then
|
|
Inc(ANextLine);
|
|
end;
|
|
end;
|
|
Result := ANextLine;
|
|
end;
|
|
|
|
function FastFindLineEnd(AText, AEnd: PWideChar): PWideChar;
|
|
begin
|
|
while AText < AEnd do
|
|
if (AText^ = CR) or (AText^ = LF) then
|
|
Break
|
|
else
|
|
Inc(AText);
|
|
Result := AText;
|
|
end;
|
|
|
|
function GetLineBreak(AHandle: TCanvasHandle; ALineStart: PWideChar;
|
|
ACount, AMaxWidth: Integer; const ATextRowFormat: TcxTextRowFormat;
|
|
var ATextRow: PcxTextRow; ACalcTextExtentsProc: TcxCalcTextExtentsProc;
|
|
AUserData: Pointer): PWideChar;
|
|
var
|
|
AExtent, ANewExtent: Integer;
|
|
AText, AEnd, P, ALineEnd: PWideChar;
|
|
AAdjustWhiteSpaces: Boolean;
|
|
begin
|
|
AExtent := 0;
|
|
AAdjustWhiteSpaces := False;
|
|
AText := ALineStart;
|
|
AEnd := ALineStart + ACount;
|
|
P := AText;
|
|
ATextRow.Text := AText;
|
|
ALineEnd := AEnd;
|
|
while AText < AEnd do
|
|
begin
|
|
if not ATextRowFormat.CalcRect and ATextRowFormat.BreakByWords then
|
|
P := cxGetNextWordBreak(CP_ACP, AText, AEnd)
|
|
else
|
|
P := FastFindLineEnd(AText, AEnd);
|
|
ALineEnd := P;
|
|
ANewExtent := ACalcTextExtentsProc(AHandle, ALineStart, P - ALineStart,
|
|
ATextRowFormat.ExpandTabs, AUserData).cx;
|
|
if ATextRowFormat.BreakByWords and (ANewExtent > AMaxWidth) then
|
|
begin
|
|
// Are there more than one word in this line and not a special case?
|
|
if (AText <> ALineStart) and not ATextRowFormat.Special then
|
|
begin
|
|
ALineEnd := AText;
|
|
P := AText;
|
|
AAdjustWhiteSpaces := True;
|
|
end
|
|
else
|
|
begin
|
|
//One word is longer than the maximum width permissible.
|
|
//See if we are allowed to break that single word.
|
|
if ATextRowFormat.BreakByChars then
|
|
begin
|
|
P := BreakAWord(AHandle, AText, P - AText, AMaxWidth - AExtent, ATextRowFormat.ExpandTabs);
|
|
ALineEnd := P;
|
|
//Note: Since we broke in the middle of a word, no need to adjust for white spaces.
|
|
end
|
|
else
|
|
begin
|
|
AAdjustWhiteSpaces := True;
|
|
// Check if we need to end this line with ellipsis
|
|
if ATextRowFormat.EndEllipsis then
|
|
// If there are CR/LF at the end, skip them.
|
|
if P < AEnd then
|
|
begin
|
|
if P^ = CR then
|
|
begin
|
|
Inc(P);
|
|
if (P < AEnd) and (P^ = LF) then
|
|
Inc(P);
|
|
AAdjustWhiteSpaces := False;
|
|
end;
|
|
if P^ = LF then
|
|
begin
|
|
Inc(P);
|
|
if (P < AEnd) and (P^ = CR) then
|
|
Inc(P);
|
|
AAdjustWhiteSpaces := False;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
Break;
|
|
end
|
|
else
|
|
// Don't do this if already at the end of the string.
|
|
if P < AEnd then
|
|
begin
|
|
if P^ = CR then
|
|
begin
|
|
Inc(P);
|
|
if (P < AEnd) and (P^ = LF) then
|
|
Inc(P);
|
|
AAdjustWhiteSpaces := False;
|
|
Break;
|
|
end;
|
|
if P^ = LF then
|
|
begin
|
|
Inc(P);
|
|
if (P < AEnd) and (P^ = CR) then
|
|
Inc(P);
|
|
AAdjustWhiteSpaces := False;
|
|
Break;
|
|
end;
|
|
end;
|
|
// Point at the beginning of the next word.
|
|
AText := P;
|
|
AExtent := ANewExtent;
|
|
end;
|
|
// Calculate the length of current line.
|
|
ATextRow.TextLength := ALineEnd - ALineStart;
|
|
// Adjust the line length and P to take care of spaces.
|
|
if AAdjustWhiteSpaces and (P < AEnd) then
|
|
begin
|
|
P := AdjustWhiteSpaces(P, ATextRow.TextLength, ATextRowFormat.Align);
|
|
if ATextRowFormat.ExcelStyle then
|
|
while (P < AEnd) and (P^ = Space) do
|
|
Inc(P);
|
|
end;
|
|
|
|
if (ATextRowFormat.Align = taDistributeX) or
|
|
(AAdjustWhiteSpaces and (ATextRowFormat.Align = taJustifyX)) then
|
|
begin
|
|
AEnd := P - 1;
|
|
while (ATextRow.TextLength > 0) and ((AEnd^ = Space) or (AEnd^ = Tab)) do
|
|
begin
|
|
Dec(AEnd);
|
|
Dec(ATextRow.TextLength);
|
|
end;
|
|
|
|
AText := ATextRow.Text;
|
|
while AText < AEnd do
|
|
begin
|
|
if (AText^ = Space) or (AText^ = Tab) then
|
|
Inc(ATextRow.BreakCount);
|
|
Inc(AText);
|
|
end;
|
|
end;
|
|
// return the begining of next line;
|
|
Result := P;
|
|
end;
|
|
|
|
procedure MakeTextRowFormat(const ATextParams: TcxTextParams; out ATextRowFormat: TcxTextRowFormat);
|
|
begin
|
|
with ATextRowFormat do
|
|
begin
|
|
BreakByWords := not ATextParams.SingleLine and
|
|
(ATextParams.WordBreak or (ATextParams.TextAlignX in [taJustifyX, taDistributeX]));
|
|
CalcRect := ATextParams.CalcRect;
|
|
EditControl := ATextParams.EditControl;
|
|
EndEllipsis := ATextParams.EndEllipsis;
|
|
ExcelStyle := ATextParams.ExcelStyle;
|
|
ExpandTabs := ATextParams.ExpandTabs;
|
|
Align := ATextParams.TextAlignX;
|
|
SingleLine := ATextParams.SingleLine;
|
|
BreakByChars := BreakByWords and (ATextParams.CharBreak or EditControl);
|
|
end;
|
|
end;
|
|
|
|
function cxMakeTextRows(AHandle: TCanvasHandle; AText: PWideChar;
|
|
ATextLength: Integer; const R: TRect; const ATextParams: TcxTextParams;
|
|
var ATextRows: TcxTextRows; out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload;
|
|
begin
|
|
Result := cxMakeTextRows(AHandle, AText, ATextLength, R, ATextParams,
|
|
ATextRows, ACount, AMaxLineCount, nil, @cxCalcTextExtentsEx);
|
|
end;
|
|
|
|
function cxMakeTextRows(AHandle: TCanvasHandle; AText: PWideChar; ATextLength: Integer;
|
|
const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
|
|
out ACount: Integer; AMaxLineCount: Integer; AUserData: Pointer;
|
|
ACalcTextExtentsProc: TcxCalcTextExtentsProc): Boolean; overload;
|
|
|
|
function CheckIsLastRow(ATotalHeight, H: Integer): Boolean;
|
|
begin
|
|
with ATextParams do
|
|
if SingleLine then
|
|
Result := True
|
|
else
|
|
if (TextAlignY = taTop) and not (CalcRect or CalcRowCount) then
|
|
begin
|
|
if EditControl and not NoClip then
|
|
Result := ATotalHeight + FullRowHeight > H
|
|
else
|
|
Result := ATotalHeight > H
|
|
end
|
|
else
|
|
Result := (AMaxLineCount > 0) and (ACount = AMaxLineCount);
|
|
end;
|
|
|
|
var
|
|
P, ATextEnd, ANextLine: PWideChar;
|
|
ATextRow: PcxTextRow;
|
|
AIsLastRow, ARectIsSmall, APreSpecial, ACalculate: Boolean;
|
|
ATotalHeight, H, W, AOffset: Integer;
|
|
ATextRowFormat: TcxTextRowFormat;
|
|
begin
|
|
cxResetTextRows(ATextRows);
|
|
ARectIsSmall := False;
|
|
ACount := 0;
|
|
if ATextLength > 0 then
|
|
begin
|
|
if ATextParams.CalcRect and ATextParams.SingleLine then
|
|
begin
|
|
ACount := 1;
|
|
ValidateTextRows(ATextRows, ACount);
|
|
ATextRow := cxGetTextRow(ATextRows, 0);
|
|
ATextRow.Text := AText;
|
|
ATextRow.TextLength := ATextLength;
|
|
cxCalcTextRowExtents(AHandle, ATextRow, ATextParams, AUserData, ACalcTextExtentsProc);
|
|
end
|
|
else
|
|
begin
|
|
P := AText;
|
|
AOffset := 0;
|
|
ATotalHeight := 0;
|
|
W := R.Right - R.Left;
|
|
ACalculate := ATextParams.CalcRect or ATextParams.CalcRowCount;
|
|
H := R.Bottom - R.Top;
|
|
ATextEnd := AText + ATextLength;
|
|
AIsLastRow := False;
|
|
MakeTextRowFormat(ATextParams, ATextRowFormat);
|
|
APreSpecial := not ATextParams.NoClip and ATextParams.EndEllipsis and
|
|
not ACalculate and not (ATextParams.TextAlignX in [taJustifyX, taDistributeX]);
|
|
while (P < ATextEnd) and not AIsLastRow do
|
|
begin
|
|
Inc(ACount);
|
|
ValidateTextRows(ATextRows, ACount);
|
|
Inc(ATotalHeight, ATextParams.FullRowHeight);
|
|
AIsLastRow := CheckIsLastRow(ATotalHeight, H);
|
|
ATextRow := cxGetTextRow(ATextRows, ACount - 1);
|
|
ATextRowFormat.Special := AIsLastRow and APreSpecial;
|
|
ANextLine := GetLineBreak(AHandle, P, ATextLength, W, ATextRowFormat,
|
|
ATextRow, ACalcTextExtentsProc, AUserData);
|
|
Dec(ATextLength, ANextLine - P);
|
|
P := ANextLine;
|
|
ATextRow.StartOffset := AOffset;
|
|
cxCalcTextRowExtents(AHandle, ATextRow, ATextParams, AUserData, ACalcTextExtentsProc);
|
|
AOffset := P - AText;
|
|
if not AIsLastRow then
|
|
AIsLastRow := ATextLength = 0;
|
|
if (AMaxLineCount > 0) and (ACount = AMaxLineCount) then
|
|
Break;
|
|
end;
|
|
if not ACalculate and (ACount > 0) then
|
|
begin
|
|
if ATextRowFormat.SingleLine then
|
|
ARectIsSmall := ATextRow.TextExtents.cx > W
|
|
else
|
|
ARectIsSmall := ATextLength > 0;
|
|
end;
|
|
end;
|
|
end;
|
|
Result := not ARectIsSmall;
|
|
end;
|
|
|
|
function cxMakeTextRows(ACanvas: TCanvas;
|
|
AText: PWideChar; ATextLength: Integer;
|
|
const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
|
|
out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload;
|
|
begin
|
|
Result := cxMakeTextRows(ACanvas.Handle, AText, ATextLength, R, ATextParams,
|
|
ATextRows, ACount, AMaxLineCount);
|
|
end;
|
|
|
|
// ANSI to WideString convertors
|
|
|
|
function AnsiStringToWideString(const S: AnsiString;
|
|
ACharSet: Byte): WideString; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
|
|
begin
|
|
Result := dxAnsiStringToWideString(S, dxGetCodePageFromCharset(ACharSet));
|
|
end;
|
|
|
|
function AnsiStringToWideString(const S: AnsiString; DC: TCanvasHandle;
|
|
AFont: TFont): WideString; overload; {$IFDEF DELPHI9} inline; {$ENDIF}
|
|
var
|
|
ACharSet: Byte;
|
|
begin
|
|
if AFont <> nil then
|
|
ACharSet := AFont.Charset
|
|
else
|
|
ACharSet := GetTextCharset(DC);
|
|
Result := AnsiStringToWideString(S, ACharSet);
|
|
end;
|
|
|
|
function cxMakeTextRows(AHandle: TCanvasHandle; AText: PAnsiChar; ATextLength: Integer;
|
|
const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
|
|
out ACount: Integer; AMaxLineCount: Integer; AUserData: Pointer;
|
|
ACalcTextExtentsProc: TcxCalcTextExtentsProc): Boolean; overload;
|
|
begin
|
|
ATextRows.Text := AnsiStringToWideString(AText, ATextParams.CharSet);
|
|
Result := cxMakeTextRows(AHandle, PWideChar(ATextRows.Text),
|
|
Length(ATextRows.Text), R, ATextParams, ATextRows, ACount,
|
|
AMaxLineCount, AUserData, ACalcTextExtentsProc);
|
|
end;
|
|
|
|
function cxMakeTextRows(ACanvas: TCanvas; AText: PAnsiChar; ATextLength: Integer;
|
|
const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
|
|
out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload;
|
|
begin
|
|
ATextRows.Text := AnsiStringToWideString(AText, ATextParams.CharSet);
|
|
Result := cxMakeTextRows(ACanvas.Handle, PWideChar(ATextRows.Text),
|
|
Length(ATextRows.Text), R, ATextParams, ATextRows, ACount, AMaxLineCount);
|
|
end;
|
|
|
|
function cxMakeTextRows(AHandle: TCanvasHandle; AText: PAnsiChar; ATextLength: Integer;
|
|
const R: TRect; const ATextParams: TcxTextParams; var ATextRows: TcxTextRows;
|
|
out ACount: Integer; AMaxLineCount: Integer = 0): Boolean; overload;
|
|
begin
|
|
ATextRows.Text := AnsiStringToWideString(AText, ATextParams.CharSet);
|
|
Result := cxMakeTextRows(AHandle, PWideChar(ATextRows.Text),
|
|
Length(ATextRows.Text), R, ATextParams, ATextRows, ACount, AMaxLineCount);
|
|
end;
|
|
|
|
procedure cxPlaceTextRows(AHandle: TCanvasHandle; const R: TRect; var ATextParams: TcxTextParams;
|
|
const ATextRows: TcxTextRows; ARowCount: Integer);
|
|
|
|
procedure CalcExtraAndTopRowOffset(out AExtra, ATopRowOffset: Integer);
|
|
var
|
|
H: Integer;
|
|
begin
|
|
AExtra := 0;
|
|
with ATextParams do
|
|
begin
|
|
if (ARowCount > 1) and (TextAlignY = taDistributeY) then
|
|
begin
|
|
H := R.Bottom - R.Top;
|
|
Dec(H, RowHeight);
|
|
if H / (ARowCount - 1) > RowHeight then
|
|
begin
|
|
FullRowHeight := H div (ARowCount - 1);
|
|
AExtra := H mod (ARowCount - 1);
|
|
end;
|
|
end;
|
|
|
|
case TextAlignY of
|
|
taCenterY:
|
|
ATopRowOffset := R.Top + (R.Bottom - R.Top - ARowCount * FullRowHeight) div 2;
|
|
taBottom:
|
|
ATopRowOffset := R.Bottom - ARowCount * FullRowHeight + tmExternalLeading;
|
|
else
|
|
ATopRowOffset := R.Top;
|
|
end;
|
|
|
|
if PreventTopExceed and (ATopRowOffset < R.Top) then
|
|
ATopRowOffset := R.Top;
|
|
end;
|
|
end;
|
|
|
|
procedure PlaceRows(AExtra, ATopRowOffset: Integer);
|
|
var
|
|
I: Integer;
|
|
begin
|
|
for I := 0 to ARowCount - 1 do
|
|
with cxGetTextRow(ATextRows, I)^ do
|
|
begin
|
|
// Horizontally
|
|
case ATextParams.TextAlignX of
|
|
taCenterX:
|
|
TextOriginX := R.Left + (R.Right - R.Left - TextExtents.cx) div 2;
|
|
taRight:
|
|
TextOriginX := R.Right - TextExtents.cx;
|
|
else
|
|
TextOriginX := R.Left;
|
|
end;
|
|
if ATextParams.PreventLeftExceed and (TextOriginX < R.Left) then
|
|
TextOriginX := R.Left;
|
|
|
|
// Vertically
|
|
TextOriginY := ATopRowOffset;
|
|
Inc(ATopRowOffset, ATextParams.FullRowHeight);
|
|
if AExtra > 0 then
|
|
begin
|
|
Inc(ATopRowOffset);
|
|
Dec(AExtra);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
var
|
|
Extra, TopRowOffset: Integer;
|
|
begin
|
|
CalcExtraAndTopRowOffset(Extra, TopRowOffset);
|
|
PlaceRows(Extra, TopRowOffset);
|
|
end;
|
|
|
|
function cxPrepareRect(const R: TRect; const ATextParams: TcxTextParams;
|
|
ALeftIndent, ARightIndent: Integer): TRect;
|
|
begin
|
|
Result := R;
|
|
with Result, ATextParams do
|
|
begin
|
|
if AutoIndents then
|
|
InflateRect(Result, -cxTextSpace * OnePixel, -cxTextSpace * OnePixel);
|
|
Inc(Left, ALeftIndent * OnePixel);
|
|
Dec(Right, ARightIndent * OnePixel);
|
|
end;
|
|
end;
|
|
|
|
function cxUnprepareRect(const R: TRect; const ATextParams: TcxTextParams;
|
|
ALeftIndent: Integer = 0; ARightIndent: Integer = 0): TRect;
|
|
begin
|
|
Result := R;
|
|
with Result, ATextParams do
|
|
begin
|
|
Dec(Left, ALeftIndent * OnePixel);
|
|
Inc(Right, ARightIndent * OnePixel);
|
|
if AutoIndents then
|
|
InflateRect(Result, cxTextSpace * OnePixel, cxTextSpace * OnePixel);
|
|
end;
|
|
end;
|
|
|
|
function IsMetaFile(AHandle: TCanvasHandle): Boolean;
|
|
begin
|
|
Result := GetObjectType(AHandle) in [OBJ_METAFILE, OBJ_METADC, OBJ_ENHMETAFILE, OBJ_ENHMETADC];
|
|
end;
|
|
|
|
{$WARNINGS OFF}
|
|
procedure cxTextRowsOutHighlight(AHandle: TCanvasHandle; const R: TRect;
|
|
const ATextParams: TcxTextParams; const ATextRows: TcxTextRows; ARowCount,
|
|
ASelStart, ASelLength: Integer; ASelBkgColor, ASelTextColor: TColor; AForceEndEllipsis: Boolean);
|
|
|
|
procedure OutTextRowAsPattern(ATextRow: PcxTextRow; R: TRect);
|
|
var
|
|
ABkColor: COLORREF;
|
|
begin
|
|
InflateRect(R, 0, -ATextParams.OnePixel);
|
|
with R do
|
|
begin
|
|
if Bottom <= Top then
|
|
Bottom := Top + ATextParams.OnePixel;
|
|
Left := ATextRow.TextOriginX;
|
|
if Right > Left + ATextRow.TextExtents.cX then
|
|
Right := Left + ATextRow.TextExtents.cX;
|
|
end;
|
|
|
|
ABkColor := SetBkColor(AHandle, ColorToRGB(clWindow));
|
|
FillRect(AHandle, R, FillPatterns[ATextParams.Bold]);
|
|
SetBkColor(AHandle, ABkColor);
|
|
end;
|
|
|
|
procedure OutTextRow(ATextRow: PcxTextRow);
|
|
var
|
|
Stub: Integer;
|
|
begin
|
|
with ATextRow^ do
|
|
if ATextParams.ExpandTabs then
|
|
begin
|
|
Stub := 0;
|
|
cxTabbedTextOutW(AHandle, TextOriginX, TextOriginY, Text, TextLength, 0, Stub, TextOriginX);
|
|
end
|
|
else
|
|
cxTextOutW(AHandle, TextOriginX, TextOriginY, Text, TextLength);
|
|
end;
|
|
|
|
procedure PrepareEndEllipsis(ATextRow: PcxTextRow; var AWidth: Integer);
|
|
var
|
|
ACharNumber: Integer;
|
|
begin
|
|
Dec(AWidth, ATextParams.EndEllipsisWidth);
|
|
if AWidth < 0 then AWidth := 0;
|
|
with ATextRow^ do
|
|
begin
|
|
if not cxGetTextExtentExPoint(AHandle, Text, TextLength, AWidth, @ACharNumber, nil) then
|
|
ACharNumber := 0;
|
|
if (ACharNumber = 0) and (ATextParams.TextAlignX = taLeft) then
|
|
ACharNumber := 1;
|
|
TextLength := ACharNumber;
|
|
end;
|
|
cxCalcTextRowExtents(AHandle, ATextRow, ATextParams);
|
|
end;
|
|
|
|
procedure OutEndEllipsis( ATextRow: PcxTextRow; var ARowRect: TRect);
|
|
const
|
|
ClipTexts: array[Boolean] of UINT = (0, ETO_CLIPPED);
|
|
var
|
|
fuOptions: UINT;
|
|
begin
|
|
Inc(ARowRect.Left, ATextRow.TextExtents.cx);
|
|
if ARowRect.Left < ARowRect.Right then
|
|
begin
|
|
fuOptions := ClipTexts[not ATextParams.NoClip and (ARowRect.Left + ATextParams.EndEllipsisWidth > ARowRect.Right)];
|
|
cxExtTextOutW(AHandle, ARowRect.Left, ATextRow.TextOriginY, fuOptions,
|
|
@ARowRect, cxEndEllipsisChars, cxEndEllipsisCharsLength, nil);
|
|
end;
|
|
end;
|
|
|
|
function GetSubstringWidth(AText: PWideChar; ATextLength, ASubstringLength: Integer): Integer;
|
|
var
|
|
ACharExtents: array of Integer;
|
|
begin
|
|
if ASubstringLength = 0 then
|
|
Result := 0
|
|
else
|
|
begin
|
|
SetLength(ACharExtents, ATextLength);
|
|
cxGetTextExtentExPoint(AHandle, AText, ATextLength, 0, nil, @ACharExtents[0]);
|
|
Result := ACharExtents[ASubstringLength - 1];
|
|
end;
|
|
end;
|
|
|
|
var
|
|
ARowRect, AHighlightRect: TRect;
|
|
W, I, F, L: Integer;
|
|
ABreakExtra: Integer;
|
|
APrevBkMode: Integer;
|
|
ASaveTextColor: TColor;
|
|
ANeedClip, ANeedEndEllipsis, AIsMetafile, AHasSelTextColor: Boolean;
|
|
ATextRow: PcxTextRow;
|
|
AHighlightStart, AHighlightEnd: Integer;
|
|
ARgn, ASaveClipRgn: HRGN;
|
|
ABrush: HBRUSH;
|
|
begin
|
|
ASelBkgColor := ColorToRGB(ASelBkgColor);
|
|
AHasSelTextColor := (ASelTextColor <> clNone) and (ASelTextColor <> clDefault);
|
|
if AHasSelTextColor then
|
|
ASelTextColor := ColorToRGB(ASelTextColor);
|
|
W := R.Right - R.Left;
|
|
APrevBkMode := SetBkMode(AHandle, Windows.TRANSPARENT);
|
|
if (ASelLength > 0) and (ASelBkgColor <> clNone) and (ASelBkgColor <> clDefault) then
|
|
ABrush := CreateSolidBrush(ASelBkgColor)
|
|
else
|
|
ABrush := 0;
|
|
AIsMetafile := IsMetaFile(AHandle);
|
|
|
|
ARowRect := R;
|
|
for I := 0 to ARowCount - 1 do
|
|
begin
|
|
ATextRow := cxGetTextRow(ATextRows, I);
|
|
with ATextRow^ do
|
|
begin
|
|
if TextLength <> 0 then
|
|
begin
|
|
ARowRect.Top := TextOriginY;
|
|
ARowRect.Bottom := ARowRect.Top + ATextParams.FullRowHeight;
|
|
if AIsMetafile or RectVisible(AHandle, ARowRect) then
|
|
begin
|
|
if ATextParams.PatternedText then
|
|
OutTextRowAsPattern(ATextRow, ARowRect)
|
|
else
|
|
begin
|
|
ANeedEndEllipsis := ATextParams.EndEllipsis and (I = ARowCount - 1) and
|
|
((TextExtents.cx > W) or AForceEndEllipsis);
|
|
ABreakExtra := 0;
|
|
if (ATextParams.TextAlignX in [taJustifyX, taDistributeX]) and not ANeedEndEllipsis then
|
|
begin
|
|
ABreakExtra := W - TextExtents.cX;
|
|
if (BreakCount <> 0) and (ABreakExtra > 0) then
|
|
SetTextJustification(AHandle, ABreakExtra, BreakCount);
|
|
end;
|
|
|
|
ANeedClip := not ATextParams.NoClip and ((TextExtents.cX > W) or
|
|
(ARowRect.Top < R.Top) or (ARowRect.Bottom > R.Bottom));
|
|
if ANeedClip then
|
|
begin
|
|
if ARowRect.Top < R.Top then ARowRect.Top := R.Top;
|
|
if ARowRect.Bottom > R.Bottom then ARowRect.Bottom := R.Bottom;
|
|
ARgn := IntersectClipRect(AHandle, ARowRect);
|
|
end;
|
|
|
|
if ANeedEndEllipsis then
|
|
PrepareEndEllipsis(ATextRow, W);
|
|
|
|
if (ASelLength > 0) and not AIsMetafile then
|
|
begin
|
|
if not ((ASelStart >= StartOffset + TextLength) or
|
|
(ASelStart + ASelLength <= StartOffset)) then
|
|
begin
|
|
F := Max(ASelStart, StartOffset);
|
|
L := Min(ASelStart + ASelLength, StartOffset + TextLength);
|
|
Dec(F, StartOffset);
|
|
Dec(L, StartOffset);
|
|
if L > F then
|
|
begin
|
|
AHighlightStart := GetSubstringWidth(Text, TextLength, F);
|
|
AHighlightEnd := GetSubstringWidth(Text, TextLength, L);
|
|
if cxGetWritingDirection(ATextParams.CharSet, Text) = coRightToLeft then
|
|
begin
|
|
AHighlightRect.Left := TextOriginX + TextExtents.cx - AHighlightEnd;
|
|
AHighlightRect.Right := TextOriginX + TextExtents.cx - AHighlightStart;
|
|
end
|
|
else
|
|
begin
|
|
AHighlightRect.Left := TextOriginX + AHighlightStart;
|
|
AHighlightRect.Right := TextOriginX + AHighlightEnd;
|
|
end;
|
|
AHighlightRect.Top := ARowRect.Top;
|
|
AHighlightRect.Bottom := ARowRect.Bottom;
|
|
if not IsRectEmpty(AHighlightRect) then
|
|
begin
|
|
ASaveClipRgn := IntersectClipRect(AHandle, AHighlightRect);
|
|
if ABrush <> 0 then
|
|
FillRect(AHandle, AHighlightRect, ABrush);
|
|
if AHasSelTextColor then
|
|
ASaveTextColor := SetTextColor(AHandle, ASelTextColor);
|
|
OutTextRow(ATextRow);
|
|
if AHasSelTextColor then
|
|
SetTextColor(AHandle, ASaveTextColor);
|
|
RestoreClipRgn(AHandle, ASaveClipRgn);
|
|
with AHighlightRect do
|
|
ExcludeClipRect(AHandle, Left, Top, Right, Bottom);
|
|
if ANeedEndEllipsis and (ASelStart + ASelLength >= StartOffset + TextLength) then
|
|
begin
|
|
ANeedEndEllipsis := False;
|
|
ASaveTextColor := SetTextColor(AHandle, ASelTextColor);
|
|
OutEndEllipsis(ATextRow, ARowRect);
|
|
SetTextColor(AHandle, ASaveTextColor);
|
|
end;
|
|
end;
|
|
end;
|
|
end
|
|
end;
|
|
OutTextRow(ATextRow);
|
|
|
|
if ANeedEndEllipsis then
|
|
OutEndEllipsis(ATextRow, ARowRect);
|
|
|
|
if ANeedClip then
|
|
RestoreClipRgn(AHandle, ARgn);
|
|
if ABreakExtra > 0 then
|
|
SetTextJustification(AHandle, 0, 0);
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
if AForceEndEllipsis and ATextParams.EndEllipsis and (I = ARowCount - 1) then
|
|
begin
|
|
ARowRect.Top := TextOriginY;
|
|
ARowRect.Bottom := ARowRect.Top + ATextParams.FullRowHeight;
|
|
PrepareEndEllipsis(ATextRow, W);
|
|
OutEndEllipsis(ATextRow, ARowRect);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
if ABrush <> 0 then
|
|
DeleteObject(ABrush);
|
|
SetBkMode(AHandle, APrevBkMode);
|
|
end;
|
|
{$WARNINGS ON}
|
|
|
|
function cxGetLongestTextRowWidth(const ATextRows: TcxTextRows; ARowCount: Integer): Integer;
|
|
var
|
|
I, W: Integer;
|
|
begin
|
|
if ARowCount > cxGetTextRowCount(ATextRows) then
|
|
ARowCount := cxGetTextRowCount(ATextRows);
|
|
Result := 0;
|
|
for I := 0 to ARowCount - 1 do
|
|
begin
|
|
W := cxGetTextRow(ATextRows, I).TextExtents.cx;
|
|
if W > Result then Result := W;
|
|
end;
|
|
end;
|
|
|
|
function CanProcessText(const ATextParams: TcxTextParams; const ATextRect: TRect): Boolean;
|
|
begin
|
|
if ATextParams.CalcRect then
|
|
Result := (ATextRect.Right - ATextRect.Left) > 0
|
|
else
|
|
Result := ((ATextRect.Right - ATextRect.Left) > 0) and ((ATextRect.Bottom - ATextRect.Top) > 0);
|
|
end;
|
|
|
|
function cxTextOut(AHandle: TCanvasHandle; const AText: WideString; var R: TRect;
|
|
AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
|
|
ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0;
|
|
ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
|
|
ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer;
|
|
var
|
|
APrevFont: HFONT;
|
|
APrevFontColor: COLORREF;
|
|
ATextHeight, ARowCount, ATextLength: Integer;
|
|
ATextParams: TcxTextParams;
|
|
ATextRect: TRect;
|
|
ATextRows: TcxTextRows;
|
|
AForceEndEllipsis: Boolean;
|
|
ATextPtr: PWideChar;
|
|
AHidePrefixStr: WideString;
|
|
begin
|
|
Result := 0;
|
|
ATextLength := Length(AText);
|
|
if ATextLength = 0 then Exit;
|
|
APrevFont := GetCurrentObject(AHandle, OBJ_FONT);
|
|
APrevFontColor := GetTextColor(AHandle);
|
|
if AFont <> nil then
|
|
begin
|
|
APrevFont := SelectObject(AHandle, AFont.Handle);
|
|
SetTextColor(AHandle, ColorToRGB(AFont.Color));
|
|
end;
|
|
if ATextColor <> clDefault then
|
|
SetTextColor(AHandle, ColorToRGB(ATextColor));
|
|
|
|
ATextParams := cxCalcTextParams(AHandle, AFormat, ALineSpacingFactor);
|
|
ATextRect := cxPrepareRect(R, ATextParams, ALeftIndent, ARightIndent);
|
|
ATextHeight := 0;
|
|
|
|
if CanProcessText(ATextParams, ATextRect) then
|
|
begin
|
|
if ATextParams.HidePrefix then
|
|
begin
|
|
AHidePrefixStr := RemoveAccelChars(AText, False);
|
|
ATextLength := Length(AHidePrefixStr);
|
|
if ATextLength = 0 then Exit;
|
|
ATextPtr := PWideChar(AHidePrefixStr);
|
|
end
|
|
else
|
|
ATextPtr := PWideChar(AText);
|
|
|
|
AForceEndEllipsis := not cxMakeTextRows(AHandle, ATextPtr, ATextLength,
|
|
ATextRect, ATextParams, ATextRows, ARowCount, AMaxLineCount);
|
|
if ARowCount <> 0 then
|
|
try
|
|
if ATextParams.CalcRect then
|
|
begin
|
|
if (AMaxLineCount > 0) and (AMaxLineCount < ARowCount) then
|
|
ARowCount := AMaxLineCount;
|
|
ATextRect.Right := ATextRect.Left + cxGetLongestTextRowWidth(ATextRows, ARowCount);
|
|
if not ATextParams.SingleLine then
|
|
begin
|
|
cxResetTextRows(ATextRows);
|
|
cxMakeTextRows(AHandle, ATextPtr, ATextLength, ATextRect, ATextParams,
|
|
ATextRows, ARowCount, AMaxLineCount);
|
|
end;
|
|
cxPlaceTextRows(AHandle, ATextRect, ATextParams, ATextRows, ARowCount);
|
|
ATextRect.Bottom := cxGetTextRow(ATextRows, ARowCount - 1).TextOriginY + ATextParams.RowHeight;
|
|
R := cxUnprepareRect(ATextRect, ATextParams, ALeftIndent, ARightIndent);
|
|
end
|
|
else
|
|
begin
|
|
cxPlaceTextRows(AHandle, ATextRect, ATextParams, ATextRows, ARowCount);
|
|
if (ASelStart < 0) or (ASelStart >= ATextLength) then
|
|
ASelLength := 0
|
|
else
|
|
if (ASelLength + ASelStart) > ATextLength then
|
|
ASelLength := ATextLength - ASelStart;
|
|
cxTextRowsOutHighlight(AHandle, ATextRect, ATextParams, ATextRows,
|
|
ARowCount, ASelStart, ASelLength, ASelBkgColor, ASelTextColor, AForceEndEllipsis);
|
|
end;
|
|
ATextHeight := cxGetTextRow(ATextRows, ARowCount - 1).TextOriginY + ATextParams.RowHeight - ATextRect.Top;
|
|
finally
|
|
cxResetTextRows(ATextRows);
|
|
end;
|
|
end;
|
|
if ATextParams.CalcRowCount or (ATextHeight = 0) then
|
|
Result := ARowCount
|
|
else
|
|
Result := ATextHeight;
|
|
|
|
SelectObject(AHandle, APrevFont);
|
|
SetTextColor(AHandle, APrevFontColor);
|
|
end;
|
|
|
|
function cxTextOut(AHandle: TCanvasHandle; const AText: WideString; var R: TRect;
|
|
AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
|
|
AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
|
|
ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer;
|
|
begin
|
|
Result := cxTextOut(AHandle, AText, R, AFormat, 0, 0, AFont, clDefault, clDefault,
|
|
AMaxLineCount, ALeftIndent, ARightIndent, ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
function cxTextOut(ACanvas: TCanvas; const AText: WideString; var R: TRect;
|
|
AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
|
|
ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0;
|
|
ARightIndent: Integer = 0; ATextColor: TColor = clDefault;
|
|
const ALineSpacingFactor: Double = 1.0): Integer;
|
|
begin
|
|
Result := cxTextOut(ACanvas.Handle, AText, R, AFormat, ASelStart, ASelLength,
|
|
AFont, ASelBkgColor, ASelTextColor, AMaxLineCount, ALeftIndent, ARightIndent,
|
|
ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
function cxTextOut(ACanvas: TCanvas; const AText: WideString; var R: TRect;
|
|
AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
|
|
AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
|
|
ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer;
|
|
begin
|
|
Result := cxTextOut(ACanvas, AText, R, AFormat, 0, 0, AFont, clDefault,
|
|
clDefault, AMaxLineCount, ALeftIndent, ARightIndent, ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
//Support for AnsiStrings
|
|
|
|
function cxTextOut(AHandle: TCanvasHandle; const AText: AnsiString; var R: TRect;
|
|
AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
|
|
ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0;
|
|
ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
|
|
ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer;
|
|
begin
|
|
Result := cxTextOut(AHandle,
|
|
AnsiStringToWideString(AText, AHandle, AFont),
|
|
R, AFormat, ASelStart, ASelLength, AFont, ASelBkgColor, ASelTextColor,
|
|
AMaxLineCount, ALeftIndent, ARightIndent, ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
function cxTextOut(AHandle: TCanvasHandle; const AText: AnsiString; var R: TRect;
|
|
AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
|
|
AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
|
|
ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload;
|
|
begin
|
|
Result := cxTextOut(AHandle,
|
|
AnsiStringToWideString(AText, AHandle, AFont),
|
|
R, AFormat, 0, 0, AFont, clDefault, clDefault, AMaxLineCount, ALeftIndent,
|
|
ARightIndent, ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
function cxTextOut(ACanvas: TCanvas; const AText: AnsiString; var R: TRect;
|
|
AFormat: TcxTextOutFormat; ASelStart, ASelLength: Integer; AFont: TFont;
|
|
ASelBkgColor, ASelTextColor: TColor; AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0;
|
|
ARightIndent: Integer = 0; ATextColor: TColor = clDefault;
|
|
const ALineSpacingFactor: Double = 1.0): Integer; overload;
|
|
begin
|
|
Result := cxTextOut(ACanvas.Handle,
|
|
AnsiStringToWideString(AText, ACanvas.Handle, AFont),
|
|
R, AFormat, ASelStart, ASelLength, AFont, ASelBkgColor, ASelTextColor,
|
|
AMaxLineCount, ALeftIndent, ARightIndent, ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
function cxTextOut(ACanvas: TCanvas; const AText: AnsiString; var R: TRect;
|
|
AFormat: TcxTextOutFormat = CXTO_DEFAULT_FORMAT; AFont: TFont = nil;
|
|
AMaxLineCount: Integer = 0; ALeftIndent: Integer = 0; ARightIndent: Integer = 0;
|
|
ATextColor: TColor = clDefault; const ALineSpacingFactor: Double = 1.0): Integer; overload;
|
|
begin
|
|
Result := cxTextOut(ACanvas.Handle,
|
|
AnsiStringToWideString(AText, ACanvas.Handle, AFont),
|
|
R, AFormat, 0, 0, AFont, clDefault, clDefault, AMaxLineCount, ALeftIndent,
|
|
ARightIndent, ATextColor, ALineSpacingFactor);
|
|
end;
|
|
|
|
procedure cxRotatedTextOut(AHandle: TCanvasHandle; const ABounds: TRect; const AText: WideString; AFont: TFont;
|
|
AAlignHorz: TcxTextAlignX = taCenterX; AAlignVert: TcxTextAlignY = taCenterY; AWordBreak: Boolean = True;
|
|
ALeftExceed: Boolean = True; ARightExceed: Boolean = True; ADirection: TcxVerticalTextOutDirection = vtdBottomToTop;
|
|
AFontSize: Integer = 0);
|
|
|
|
const
|
|
Angles: array[TcxVerticalTextOutDirection] of Integer = (-900, 900);
|
|
Flags: array[TcxVerticalTextOutDirection] of Integer =
|
|
(TA_LEFT or TA_BOTTOM or TA_NOUPDATECP, TA_LEFT or TA_TOP or TA_NOUPDATECP);
|
|
|
|
procedure AddRow(AList: TList; AFirstChar: PWideChar; ACount, AWidth: Integer);
|
|
begin
|
|
AList.Add(AFirstChar);
|
|
AList.Add(Pointer(ACount));
|
|
AList.Add(Pointer(AWidth));
|
|
end;
|
|
|
|
function CreateRotatedFont: HFONT;
|
|
var
|
|
ALogFontW: TLogFontW;
|
|
ALogFontA: TLogFontA;
|
|
begin
|
|
if IsWinNT then
|
|
begin
|
|
FillChar(ALogFontW, SizeOf(ALogFontW), 0);
|
|
GetObject(AFont.Handle, SizeOf(TLogFontW), @ALogFontW);
|
|
if AFontSize <> 0 then
|
|
ALogFontW.lfHeight := -MulDiv(AFontSize, GetDeviceCaps(AHandle, LOGPIXELSY), 72);
|
|
ALogFontW.lfEscapement := Angles[ADirection];
|
|
ALogFontW.lfOutPrecision := OUT_TT_ONLY_PRECIS;
|
|
Result := CreateFontIndirectW(ALogFontW);
|
|
end
|
|
else
|
|
begin
|
|
FillChar(ALogFontA, SizeOf(ALogFontA), 0);
|
|
GetObject(AFont.Handle, SizeOf(TLogFontA), @ALogFontA);
|
|
if AFontSize <> 0 then
|
|
ALogFontA.lfHeight := -MulDiv(AFontSize, GetDeviceCaps(AHandle, LOGPIXELSY), 72);
|
|
ALogFontA.lfEscapement := Angles[ADirection];
|
|
ALogFontA.lfOutPrecision := OUT_TT_ONLY_PRECIS;
|
|
Result := CreateFontIndirectA(ALogFontA);
|
|
end;
|
|
end;
|
|
|
|
function TextSize(ACurrentChar: PWideChar; ACharCount: Integer): TSize;
|
|
begin
|
|
cxGetTextExtentPoint32W(AHandle, ACurrentChar, ACharCount, Result);
|
|
end;
|
|
|
|
function TextWidth(const AFirstChar: PWideChar; ACharCount: Integer): Integer;
|
|
var
|
|
ASize: TSize;
|
|
begin
|
|
cxGetTextExtentPoint32W(AHandle, AFirstChar, ACharCount, ASize);
|
|
Result := ASize.cx;
|
|
end;
|
|
|
|
function MakeRow(var AFirstChar: PWideChar; ALastChar: PWideChar;
|
|
ACharCount, ARowCharCount: Integer; ATextRows: TList): Integer;
|
|
begin
|
|
// make break and move first point to current point
|
|
AddRow(ATextRows, AFirstChar, ARowCharCount, TextWidth(AFirstChar, ARowCharCount));
|
|
if ALastChar^ = ' ' then
|
|
begin
|
|
Dec(ACharCount);
|
|
Inc(ALastChar);
|
|
end;
|
|
AFirstChar := ALastChar;
|
|
Result := ACharCount - ARowCharCount;
|
|
end;
|
|
|
|
procedure CalculateWordWrappedTextRows(AFirstChar: PWideChar;
|
|
ACharCount, ATextWidth: Integer; ATextRows: TList);
|
|
var
|
|
ACurrentChar, APrevBreakChar: PWideChar;
|
|
AIsBreakChar, AHasPrevBreak: Boolean;
|
|
APos, APrevBreakPos, AWidth: Integer;
|
|
begin
|
|
while ACharCount > 0 do
|
|
begin
|
|
ACurrentChar := AFirstChar;
|
|
APos := 0;
|
|
AHasPrevBreak := False;
|
|
AWidth := 0;
|
|
APrevBreakPos := 0;
|
|
APrevBreakChar := ' ';
|
|
while APos < ACharCount do
|
|
begin
|
|
Inc(ACurrentChar);
|
|
Inc(APos);
|
|
AIsBreakChar := (ACurrentChar^ = Space) or (ACurrentChar^ = CR) or (ACurrentChar^ = LF);
|
|
if AIsBreakChar or (APos = ACharCount) then
|
|
begin
|
|
AWidth := TextWidth(AFirstChar, APos);
|
|
if AWidth < ATextWidth then
|
|
begin
|
|
AHasPrevBreak := AIsBreakChar;
|
|
APrevBreakPos := APos;
|
|
APrevBreakChar := ACurrentChar;
|
|
end;
|
|
end;
|
|
if (AIsBreakChar and ((AWidth > ATextWidth) or (ACurrentChar^ = CR) or (ACurrentChar^ = LF))) or (APos = ACharCount) then
|
|
begin
|
|
if AHasPrevBreak and (AWidth > ATextWidth) then
|
|
begin
|
|
APos := APrevBreakPos;
|
|
ACurrentChar := APrevBreakChar;
|
|
end;
|
|
ACharCount := MakeRow(AFirstChar, ACurrentChar, ACharCount, APos, ATextRows);
|
|
Break;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function ProcessHorizontalAlignemnt(const ATextBounds: TRect;
|
|
AWidth: Integer): Integer;
|
|
var
|
|
ARightPos, ALeftPos: Integer;
|
|
begin
|
|
if ADirection = vtdBottomToTop then
|
|
begin
|
|
ARightPos := ATextBounds.Top + AWidth;
|
|
ALeftPos := ATextBounds.Bottom;
|
|
end
|
|
else
|
|
begin
|
|
ALeftPos := ATextBounds.Top;
|
|
ARightPos := ATextBounds.Bottom - AWidth;
|
|
end;
|
|
if AAlignHorz = taLeft then
|
|
Result := ALeftPos
|
|
else
|
|
if AAlignHorz = taRight then
|
|
Result := ARightPos
|
|
else
|
|
begin
|
|
if ADirection = vtdBottomToTop then
|
|
Result := (ATextBounds.Top + ATextBounds.Bottom + AWidth) div 2
|
|
else
|
|
Result := (ATextBounds.Top + ATextBounds.Bottom - AWidth) div 2
|
|
end;
|
|
if AWidth > (ATextBounds.Bottom - ATextBounds.Top) then
|
|
begin
|
|
if ARightExceed then
|
|
Result := ARightPos
|
|
else
|
|
if ALeftExceed then
|
|
Result := ALeftPos;
|
|
end;
|
|
end;
|
|
|
|
function ProcessVerticalAlignemnt(const ATextBounds: TRect;
|
|
ARowHeight, ARowCount: Integer): Integer;
|
|
begin
|
|
if ADirection = vtdBottomToTop then
|
|
begin
|
|
// align by horizontally
|
|
if AAlignVert = taBottom then
|
|
begin
|
|
Result := ATextBounds.Right - ARowHeight * ARowCount;
|
|
if Result < ATextBounds.Left then
|
|
Result := ATextBounds.Left;
|
|
end
|
|
else
|
|
if AAlignVert = taCenterY then
|
|
Result := (ATextBounds.Left + ATextBounds.Right - ARowHeight * ARowCount) div 2
|
|
else
|
|
Result := ATextBounds.Left;
|
|
if Result < ATextBounds.Left then
|
|
Result := ATextBounds.Left;
|
|
end
|
|
else
|
|
begin
|
|
if AAlignVert = taTop then
|
|
Result := ATextBounds.Right - ARowHeight
|
|
else
|
|
if AAlignVert = taCenterY then
|
|
Result := (ATextBounds.Left - ARowHeight + ATextBounds.Right + ARowHeight * (ARowCount - 1)) div 2
|
|
else
|
|
Result := ATextBounds.Left + ARowHeight * (ARowCount - 1);
|
|
if Result > (ATextBounds.Right - ARowHeight) then
|
|
Result := ATextBounds.Right - ARowHeight;
|
|
end;
|
|
end;
|
|
|
|
procedure PlaceTextRows(ATextRows: TList; ATextBounds: TRect);
|
|
var
|
|
ASize: TSize;
|
|
I, ALeft, ATop, ARowCount, AWidth: Integer;
|
|
begin
|
|
cxGetTextExtentPoint32W(AHandle, 'Wg', 2, ASize);
|
|
ARowCount := ATextRows.Count div 3;
|
|
ALeft := ProcessVerticalAlignemnt(ATextBounds, ASize.cy, ARowCount);
|
|
for I := 0 to ARowCount - 1 do
|
|
begin
|
|
// align by vertically
|
|
AWidth := Integer(ATextRows.List^[I * 3 + 2]);
|
|
ATop := ProcessHorizontalAlignemnt(ATextBounds, AWidth);
|
|
// out text row
|
|
cxExtTextOutW(AHandle, ALeft, ATop, 0{ETO_CLIPPED}, @ATextBounds,
|
|
PWideChar(ATextRows.List^[I * 3]), Integer(ATextRows.List^[I * 3 + 1]), nil);
|
|
// offset place and check visibility
|
|
if ADirection = vtdBottomToTop then
|
|
Inc(ALeft, ASize.cy)
|
|
else
|
|
Dec(ALeft, ASize.cy);
|
|
if (ALeft < ATextBounds.Left) or (ALeft > ATextBounds.Right) then
|
|
Break;
|
|
end;
|
|
end;
|
|
|
|
var
|
|
ATextRows: TList;
|
|
AFontHandle: HFONT;
|
|
ATextBounds: TRect;
|
|
ACharCount, AMode, AWidth: Integer;
|
|
begin
|
|
ACharCount := Length(AText);
|
|
if ACharCount = 0 then Exit;
|
|
ATextBounds := ABounds;
|
|
InflateRect(ATextBounds, -2, -2);
|
|
AWidth := ATextBounds.Bottom - ATextBounds.Top;
|
|
AFontHandle := SelectObject(AHandle, CreateRotatedFont);
|
|
AMode := SetBkMode(AHandle, Windows.TRANSPARENT);
|
|
ATextRows := TList.Create;
|
|
try
|
|
ATextRows.Capacity := Length(AText) * 3;
|
|
SetTextAlign(AHandle, Flags[ADirection]);
|
|
if not AWordBreak then
|
|
AddRow(ATextRows, @AText[1], ACharCount, TextWidth(@AText[1], ACharCount))
|
|
else
|
|
CalculateWordWrappedTextRows(@AText[1], ACharCount, AWidth, ATextRows);
|
|
PlaceTextRows(ATextRows, ATextBounds);
|
|
finally
|
|
SetBkMode(AHandle, AMode);
|
|
AFontHandle := SelectObject(AHandle, AFontHandle);
|
|
DeleteObject(AFontHandle);
|
|
ATextRows.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure cxRotatedTextOut(AHandle: TCanvasHandle; const ABounds: TRect; const AText: AnsiString; AFont: TFont;
|
|
AAlignHorz: TcxTextAlignX = taCenterX; AAlignVert: TcxTextAlignY = taCenterY; AWordBreak: Boolean = True;
|
|
ALeftExceed: Boolean = True; ARightExceed: Boolean = True; ADirection: TcxVerticalTextOutDirection = vtdBottomToTop;
|
|
AFontSize: Integer = 0);
|
|
begin
|
|
cxRotatedTextOut(AHandle, ABounds,
|
|
AnsiStringToWideString(AText, AHandle, AFont),
|
|
AFont, AAlignHorz, AAlignVert, AWordBreak, ALeftExceed, ARightExceed,
|
|
ADirection, AFontSize);
|
|
end;
|
|
|
|
procedure CreateFillPatterns;
|
|
const
|
|
BoldPatternBits: array[0..7] of Word = ($0000, $0000, $0000, $0000, $0000, $0000, $0000, $0000);
|
|
StandardPatternBits: array[0..7] of Word = ($5555, $AAAA, $5555, $AAAA, $5555, $AAAA, $5555, $AAAA);
|
|
|
|
function CreateFillPattern(AIsBold: Boolean): HBRUSH;
|
|
var
|
|
ABits: Pointer ;
|
|
ABitmap: HBITMAP;
|
|
begin
|
|
if AIsBold then
|
|
ABits := @BoldPatternBits
|
|
else
|
|
ABits := @StandardPatternBits;
|
|
ABitmap := CreateBitmap(8, 8, 1, 1, ABits);
|
|
try
|
|
Result := CreatePatternBrush(ABitmap);
|
|
finally
|
|
DeleteObject(ABitmap);
|
|
end;
|
|
end;
|
|
|
|
begin
|
|
FillPatterns[False] := CreateFillPattern(False);
|
|
FillPatterns[True] := CreateFillPattern(True);
|
|
end;
|
|
|
|
procedure DestroyFillPatterns;
|
|
begin
|
|
if FillPatterns[False] <> 0 then DeleteObject(FillPatterns[False]);
|
|
if FillPatterns[True] <> 0 then DeleteObject(FillPatterns[True]);
|
|
end;
|
|
|
|
initialization
|
|
CreateFillPatterns;
|
|
|
|
finalization
|
|
DestroyFillPatterns;
|
|
|
|
end.
|