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| {
Version 11.4
Copyright (c) 2008-2013 by HtmlViewer Team
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Note that the source modules HTMLGIF1.PAS and DITHERUNIT.PAS
are covered by separate copyright notices located in those modules.
}
unit HtmlGlobals;
{$I htmlcons.inc}
interface
uses
{$ifdef HasSystemUITypes}
System.UITypes,
{$endif}
{$ifdef UseVCLStyles}
Vcl.Themes,
{$endif}
Classes, SysUtils, Graphics, Controls,
{$ifdef MSWINDOWS}
Windows,
{$endif}
{$ifdef LCL}
LclIntf, LclType, Types,
StdCtrls, Buttons, Forms, Base64,
HtmlMisc,
WideStringsLcl,
{$ifdef DebugIt}
{$message 'HtmlViewer uses LCL standard controls.'}
{$endif}
{$else}
Consts,
StrUtils,
StdCtrls,
{$ifdef UseTNT}
{$ifdef DebugIt}
{$message 'HtmlViewer uses TNT unicode controls.'}
{$endif}
TntControls,
TntStdCtrls,
{$ifdef Compiler18_Plus}
WideStrings,
{$else}
TntWideStrings,
{$endif}
TntClasses,
{$else UseTNT}
{$ifdef DebugIt}
{$message 'HtmlViewer uses VCL standard controls.'}
{$endif}
Buttons,
{$ifdef Compiler18_Plus}
WideStrings,
{$else}
TntWideStrings,
TntClasses,
{$endif}
{$endif UseTNT}
{$endif}
Math;
type
{$IFNDEF DOTNET}
{$IFNDEF FPC}
//needed so that in FreePascal, we can use pointers of different sizes
{$IFDEF WIN32}
PtrInt = LongInt;
PtrUInt = LongWord;
{$ENDIF}
{$IFDEF WIN64}
PtrInt = Int64;
PtrUInt = Int64;
{$ENDIF}
//NOTE: The code below asumes a 32bit Linux architecture (such as target i386-linux)
{$IFDEF KYLIX}
PtrInt = LongInt;
PtrUInt = LongWord;
{$ENDIF}
{$ENDIF}
{$ENDIF}
{$ifdef DebugIt}
{$ifdef UNICODE}
{$message 'Compiler uses unicode by default.'}
{$else}
{$message 'Compiler uses single byte chars by default.'}
{$endif}
{$message 'HtmlViewer uses unicode.'}
{$endif}
{$ifdef FPC}
{$else}
{$ifdef Compiler18_Plus}
{$else}
TWideStringList = class(TTntStringList);
{$endif}
{$endif}
{$ifdef UNICODE}
ThtChar = Char;
ThtString = string;
ThtStrings = TStrings;
ThtStringList = TStringList;
PhtChar = PChar;
{$else}
UnicodeString = WideString;
ThtChar = WideChar;
ThtString = WideString;
ThtStrings = TWideStrings;
ThtStringList = TWideStringList;
PhtChar = PWideChar;
{$endif}
ThtCharArray = array of ThtChar;
ThtStringArray = array of ThtString;
ThtIntegerArray = array of Integer;
ThtEdit = class({$ifdef UseTNT} TTntEdit {$else} TEdit {$endif})
protected
procedure KeyDown(var Key: Word; Shift: TShiftState); override;
end;
{$ifdef UseTNT}
ThtButton = TTntButton;
ThtMemo = TTntMemo;
ThtCombobox = TTntComboBox;
ThtListbox = TTntListBox;
ThtCheckBox = TTntCheckBox;
ThtRadioButton = TTntRadioButton;
ThtHintWindow = TTntHintWindow;
{$else}
ThtButton = TBitBtn; //BG, 25.12.2010: TBitBtn uses correct charset, but TButton does not.
ThtMemo = TMemo;
ThtCombobox = TCombobox;
ThtListbox = TListbox;
ThtCheckBox = TCheckBox;
ThtRadioButton = TRadioButton;
ThtHintWindow = THintWindow;
{$endif}
{$ifdef HasSystemUITypes}
ThtScrollStyle = System.UITypes.TScrollStyle;
{$else}
ThtScrollStyle = TScrollStyle;
{$endif}
//BG, 10.12.2010: don't add virtual methods or fields. It is only used to access protected stuff of TCanvas.
ThtCanvas = class(TCanvas)
public
procedure htTextRect(const Rect: TRect; X, Y: Integer; const Text: ThtString);
end;
const
EofChar = ThtChar(#0);
TabChar = ThtChar(#9);
LfChar = ThtChar(#10);
FfChar = ThtChar(#12);
CrChar = ThtChar(#13);
SpcChar = ThtChar(' ');
DotChar = ThtChar('.');
LessChar = ThtChar('<');
MinusChar = ThtChar('-');
GreaterChar = ThtChar('>');
PercentChar = ThtChar('%');
AmperChar = ThtChar('&');
StarChar = ThtChar('*');
CrLf = ThtString(#13#10);
CrLfTab = ThtString(#13#10#9);
NullRect: TRect = (Left: 0; Top: 0; Right: 0; Bottom: 0);
{$ifdef LCL}
const
HWND_MESSAGE = HWND(-3);
//ANSI_CHARSET = 0; // ANSI charset (Windows-1252)
//DEFAULT_CHARSET = 1;
//SYMBOL_CHARSET = 2;
MAC_CHARSET = 77;
//SHIFTJIS_CHARSET = 128; // Shift JIS charset (Windows-932)
//HANGEUL_CHARSET = 129; // Hangeul charset (Windows-949)
JOHAB_CHARSET = 130; // Johab charset (Windows-1361)
//GB2312_CHARSET = 134; // GB2312 charset (Windows-936)
//CHINESEBIG5_CHARSET = 136; // Chinese Big5 charset (Windows-950)
//GREEK_CHARSET = 161; // Greek charset (Windows-1253)
//TURKISH_CHARSET = 162; // Turkish charset (Windows-1254)
VIETNAMESE_CHARSET = 163; // Vietnamese charset (Windows-1258)
//HEBREW_CHARSET = 177; // Hebrew charset (Windows-1255)
//ARABIC_CHARSET = 178; // Arabic charset (Windows-1256)
//BALTIC_CHARSET = 186; // Baltic charset (Windows-1257)
//RUSSIAN_CHARSET = 204; // Cyrillic charset (Windows-1251)
//THAI_CHARSET = 222; // Thai charset (Windows-874)
//EASTEUROPE_CHARSET = 238; // Eastern european charset (Windows-1250)
//OEM_CHARSET = 255;
const
{ Global Memory Flags }
GMEM_FIXED = 0;
{$EXTERNALSYM GMEM_FIXED}
GMEM_MOVEABLE = 2;
{$EXTERNALSYM GMEM_MOVEABLE}
GMEM_NOCOMPACT = $10;
{$EXTERNALSYM GMEM_NOCOMPACT}
GMEM_NODISCARD = $20;
{$EXTERNALSYM GMEM_NODISCARD}
GMEM_ZEROINIT = $40;
{$EXTERNALSYM GMEM_ZEROINIT}
GMEM_MODIFY = $80;
{$EXTERNALSYM GMEM_MODIFY}
GMEM_DISCARDABLE = $100;
{$EXTERNALSYM GMEM_DISCARDABLE}
GMEM_NOT_BANKED = $1000;
{$EXTERNALSYM GMEM_NOT_BANKED}
GMEM_SHARE = $2000;
{$EXTERNALSYM GMEM_SHARE}
GMEM_DDESHARE = $2000;
{$EXTERNALSYM GMEM_DDESHARE}
GMEM_NOTIFY = $4000;
{$EXTERNALSYM GMEM_NOTIFY}
GMEM_LOWER = GMEM_NOT_BANKED;
{$EXTERNALSYM GMEM_LOWER}
GMEM_VALID_FLAGS = 32626;
{$EXTERNALSYM GMEM_VALID_FLAGS}
GMEM_INVALID_HANDLE = $8000;
{$EXTERNALSYM GMEM_INVALID_HANDLE}
GHND = GMEM_MOVEABLE or GMEM_ZEROINIT;
{$EXTERNALSYM GHND}
GPTR = GMEM_FIXED or GMEM_ZEROINIT;
{$EXTERNALSYM GPTR}
// device caps
{$EXTERNALSYM SHADEBLENDCAPS}
SHADEBLENDCAPS = 45;
{$EXTERNALSYM SB_CONST_ALPHA}
SB_CONST_ALPHA = 1;
{
const
HeapAllocFlags = GMEM_MOVEABLE;
type
// missing in unit Graphics
TProgressStage = (
psStarting,
psRunning,
psEnding
);
}
procedure DecodeStream(Input, Output: TStream);
{$endif}
{$ifndef Compiler17_Plus}
type
TBytes = array of byte;
{$endif}
var
IsWin95: Boolean;
IsWin32Platform: Boolean; {win95, 98, ME}
ColorBits: Byte;
ThePalette: HPalette; {the rainbow palette for 256 colors}
PalRelative: integer;
const
{DarkerColors and LighterColors need to be in the interface section for inlining to work.}
DarkerColors: array [0..255] of Byte = (
0, 1, 1, 2, 3, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 9,
10, 11, 11, 12, 13, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 19,
20, 21, 21, 22, 23, 23, 24, 24, 25, 26, 26, 27, 28, 28, 29, 29,
30, 31, 31, 32, 33, 33, 34, 35, 35, 36, 36, 37, 38, 38, 39, 40,
40, 41, 41, 42, 43, 43, 44, 45, 45, 46, 46, 47, 48, 48, 49, 50,
50, 51, 51, 52, 53, 53, 54, 55, 55, 56, 56, 57, 58, 58, 59, 60,
60, 61, 61, 62, 63, 63, 64, 65, 65, 66, 67, 67, 68, 68, 69, 70,
70, 71, 72, 72, 73, 73, 74, 75, 75, 76, 77, 77, 78, 78, 79, 80,
80, 81, 82, 82, 83, 83, 84, 85, 85, 86, 87, 87, 88, 88, 89, 90,
90, 91, 92, 92, 93, 93, 94, 95, 95, 96, 97, 97, 98, 99, 99, 100,
100, 101, 102, 102, 103, 104, 104, 105, 105, 106, 107, 107, 108, 109, 109, 110,
110, 111, 112, 112, 113, 114, 114, 115, 115, 116, 117, 117, 118, 119, 119, 120,
120, 121, 122, 122, 123, 124, 124, 125, 125, 126, 127, 127, 128, 129, 129, 130,
131, 131, 132, 132, 133, 134, 134, 135, 136, 136, 137, 137, 138, 139, 139, 140,
141, 141, 142, 142, 143, 144, 144, 145, 146, 146, 147, 147, 148, 149, 149, 150,
151, 151, 152, 152, 153, 154, 154, 155, 156, 156, 157, 157, 158, 159, 159, 160
);
LighterColors: array [0..255] of Byte = (
128, 128, 129, 129, 130, 130, 131, 131, 132, 132, 133, 133, 134, 134, 135, 135,
136, 136, 137, 137, 138, 138, 139, 139, 140, 140, 141, 141, 142, 142, 143, 143,
144, 144, 145, 145, 146, 146, 147, 147, 148, 148, 149, 149, 150, 150, 151, 151,
152, 152, 153, 153, 154, 154, 155, 155, 156, 156, 157, 157, 158, 158, 159, 159,
160, 160, 161, 161, 162, 162, 163, 163, 164, 164, 165, 165, 166, 166, 167, 167,
168, 168, 169, 169, 170, 170, 171, 171, 172, 172, 173, 173, 174, 174, 175, 175,
176, 176, 177, 177, 178, 178, 179, 179, 180, 180, 181, 181, 182, 182, 183, 183,
184, 184, 185, 185, 186, 186, 187, 187, 188, 188, 189, 189, 190, 190, 191, 191,
192, 192, 193, 193, 194, 194, 195, 195, 196, 196, 197, 197, 198, 198, 199, 199,
200, 200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 205, 206, 206, 207, 207,
208, 208, 209, 209, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215, 215,
216, 216, 217, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222, 222, 223, 223,
224, 224, 225, 225, 226, 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 231,
232, 232, 233, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 239,
240, 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, 247, 247,
248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 253, 254, 254, 255, 255
);
{$ifdef CopyPaletteMissing}
function CopyPalette(Palette: HPALETTE): HPALETTE;
{$endif}
{$ifdef TransparentStretchBltMissing}
function TransparentStretchBlt(DstDC: HDC; DstX, DstY, DstW, DstH: Integer;
SrcDC: HDC; SrcX, SrcY, SrcW, SrcH: Integer; MaskDC: HDC; MaskX,
MaskY: Integer): Boolean;
{$endif}
procedure htAppendChr(var Dest: ThtString; C: ThtChar); {$ifdef UseInline} inline; {$endif}
procedure htAppendStr(var Dest: ThtString; const S: ThtString); {$ifdef UseInline} inline; {$endif}
procedure htSetString(var Dest: ThtString; Chr: PhtChar; Len: Integer); {$ifdef UseInline} inline; {$endif}
function htCompareString(S1, S2: ThtString): Integer; {$ifdef UseInline} inline; {$endif}
function htLowerCase(Str: ThtString): ThtString; {$ifdef UseInline} inline; {$endif}
function htTrim(Str: ThtString): ThtString; {$ifdef UseInline} inline; {$endif}
function htUpperCase(Str: ThtString): ThtString; {$ifdef UseInline} inline; {$endif}
// Posx(SubStr, S, Offst): find substring in S starting at Offset:
function PosX(const SubStr, S: ThtString; Offset: Integer = 1): Integer;
function IsAlpha(Ch: ThtChar): Boolean; {$ifdef UseInline} inline; {$endif}
function IsDigit(Ch: ThtChar): Boolean; {$ifdef UseInline} inline; {$endif}
function RemoveQuotes(const S: ThtString): ThtString;
//{$ifdef UnitConstsMissing}
//const
// SOutOfResources = 'Out of system resources';
// SInvalidBitmap = 'Bitmap image is not valid';
// SScanLine = 'Scan line index out of range';
//{$endif}
function PtrSub(P1, P2: Pointer): Integer; {$ifdef UseInline} inline; {$endif}
function PtrAdd(P1: Pointer; Offset: Integer): Pointer; {$ifdef UseInline} inline; {$endif}
procedure PtrInc(var P1; Offset: Integer); {$ifdef UseInline} inline; {$endif}
// BG, 17.04.2013: Color of Darker() and Lighter() must be RGB or palette values. Themed or system colors are not supported!
function Darker(Color : TColor): TColor; {$ifdef UseInline} inline; {$endif}
function Lighter(Color : TColor): TColor; {$ifdef UseInline} inline; {$endif}
//code movements from HTMLSubs
function FindSpaces(PStart : PWideChar; const ACount : Integer) : Integer; {$ifdef UseInline} inline; {$endif}
procedure InitFullBg(var FullBG : Graphics.TBitmap; const W, H: Integer; const AIsCopy : Boolean); {$ifdef UseInline} inline; {$endif}
procedure Circle(ACanvas : TCanvas; const X, Y, Rad: Integer); {$ifdef UseInline} inline; {$endif}
//alpha blend determination for Printers only
function CanPrintAlpha(ADC : HDC) : Boolean; {$ifdef UseInline} inline; {$endif}
procedure GetTSize(DC: HDC; P : PWideChar; N : Integer; var VSize : TSize); {$ifdef UseInline} inline; {$endif}
function ThemedColor(const AColor : TColor
{$ifdef has_StyleElements};const AUseThemes : Boolean{$endif}
): TColor; {$ifdef UseInline} inline; {$endif} //overload;
function TextEndsWith(const SubStr, S : ThtString) : Boolean; {$ifdef UseInline} inline; {$endif}
function TextStartsWith(const SubStr, S : ThtString) : Boolean; {$ifdef UseInline} inline; {$endif}
implementation
{$ifdef has_StyleElements}
function ThemedColor(const AColor : TColor; const AUseThemes : Boolean): TColor; {$ifdef UseInline} inline; {$endif} overload;
begin
if AUseThemes and TStyleManager.IsCustomStyleActive then begin
Result := StyleServices.GetSystemColor(AColor);
end else begin
Result := AColor;
end;
Result := ColorToRGB(Result);
end;
{$else}
function ThemedColor(const AColor : TColor): TColor;
begin
{$ifdef UseVCLStyles}
if TStyleManager.IsCustomStyleActive then begin
Result := StyleServices.GetSystemColor(AColor);
end else begin
Result := AColor;
end;
Result := ColorToRGB(Result);
{$else}
if AColor < 0 then
Result := GetSysColor(AColor and $FFFFFF)
else
Result := AColor and $FFFFFF;
{$endif}
end;
{$endif}
procedure GetTSize(DC: HDC; P : PWideChar; N : Integer; var VSize : TSize);
var
Dummy: Integer;
begin
if not IsWin32Platform then
GetTextExtentExPointW(DC, P, N, 0, @Dummy, nil, VSize)
else
GetTextExtentPoint32W(DC, P, N, VSize); {win95, 98 ME}
end;
function CanPrintAlpha(ADC : HDC) : Boolean; {$ifdef UseInline} inline; {$endif}
begin
Result := GetDeviceCaps(ADC,SHADEBLENDCAPS) and SB_CONST_ALPHA > 0;
end;
function Darker(Color : TColor): TColor; {$ifdef UseInline} inline; {$endif}
{find a somewhat darker color for shading purposes}
var
Red, Green, Blue: Byte;
begin
Result := GetSysColor(Color); //ThemedColor(Color{$ifdef has_StyleElements},AUseThemes{$endif});
Red := DarkerColors[Byte(Result )];
Green := DarkerColors[Byte(Result shr 8)];
Blue := DarkerColors[Byte(Result shr 16)];
Result := RGB(Red, Green, Blue);
end;
function Lighter(Color : TColor) : TColor; {$ifdef UseInline} inline; {$endif}
{find a somewhat lighter color for shading purposes}
var
Red, Green, Blue: Byte;
begin
Result := GetSysColor(Color); // ThemedColor(Color{$ifdef has_StyleElements},AUseThemes{$endif});
Red := LighterColors[Byte(Result )];
Green := LighterColors[Byte(Result shr 8)];
Blue := LighterColors[Byte(Result shr 16)];
Result := RGB(Red, Green, Blue);
end;
function FindSpaces(PStart : PWideChar; const ACount : Integer) : Integer;
var
I: Integer;
begin
Result := 0;
for I := 0 to ACount - 2 do {-2 so as not to count end spaces}
if ((PStart + I)^ = ' ') or ((PStart + I)^ = #160) then
Inc(Result);
end;
procedure InitFullBg(var FullBG : Graphics.TBitmap; const W, H: Integer; const AIsCopy : Boolean);
begin
if not Assigned(FullBG) then
begin
FullBG := Graphics.TBitmap.Create;
if AIsCopy then
begin
FullBG.HandleType := bmDIB;
if ColorBits <= 8 then
FullBG.Palette := CopyPalette(ThePalette);
end;
end;
FullBG.Width := Max(W,2);
FullBG.Height := Max(H,2);
end;
procedure Circle(ACanvas : TCanvas; const X, Y, Rad: Integer);
begin
ACanvas.Ellipse(X, Y - Rad, X + Rad, Y);
end;
//-- BG ------------------------------------------------------------------------
function PtrSub(P1, P2: Pointer): Integer;
begin
{$ifdef FPC}
Result := P1 - P2;
{$else}
Result := PAnsiChar(P1) - PAnsiChar(P2);
{$endif}
end;
//-- BG ------------------------------------------------------------------------
function PtrAdd(P1: Pointer; Offset: Integer): Pointer;
begin
{$ifdef FPC}
Result := P1 + Offset;
{$else}
Result := PAnsiChar(P1) + Offset;
{$endif}
end;
//-- BG ------------------------------------------------------------------------
procedure PtrInc(var P1; Offset: Integer);
begin
{$ifdef FPC}
Inc(PAnsiChar(P1), Offset);
{$else}
Inc(PAnsiChar(P1), Offset);
{$endif}
end;
procedure CalcPalette(DC: HDC);
{calculate a rainbow palette, one with equally spaced colors}
const
Values: array[0..5] of integer = (55, 115, 165, 205, 235, 255);
var
LP: ^TLogPalette;
I, J, K, Sub: integer;
begin
GetMem(LP, Sizeof(TLogPalette) + 256 * Sizeof(TPaletteEntry));
try
with LP^ do
begin
palVersion := $300;
palNumEntries := 256;
GetSystemPaletteEntries(DC, 0, 256, palPalEntry);
Sub := 10; {start at entry 10}
for I := 0 to 5 do
for J := 0 to 5 do
for K := 0 to 5 do
if not ((I = 5) and (J = 5) and (K = 5)) then {skip the white}
with palPalEntry[Sub] do
begin
peBlue := Values[I];
peGreen := Values[J];
peRed := Values[K];
peFlags := 0;
Inc(Sub);
end;
for I := 1 to 24 do
if not (I in [7, 15, 21]) then {these would be duplicates}
with palPalEntry[Sub] do
begin
peBlue := 130 + 5 * I;
peGreen := 130 + 5 * I;
peRed := 130 + 5 * I;
peFlags := 0;
Inc(Sub);
end;
Sub := 245;
with palPalEntry[Sub] do
begin
peBlue := 254;
peGreen := 255;
peRed := 255;
peFlags := 0;
end;
ThePalette := CreatePalette(LP^);
end;
finally
FreeMem(LP, Sizeof(TLogPalette) + 256 * Sizeof(TPaletteEntry));
end;
end;
{$ifdef CopyPaletteMissing}
// -----------
// CopyPalette
// -----------
// Copies a HPALETTE.
//
// Copied from D3 graphics.pas. This is declared private in some old versions
// of Delphi 2 and is missing in Lazarus Component Library (LCL), so we have
// to implement it here to support those versions.
//
// Parameters:
// Palette The palette to copy.
//
// Returns:
// The handle to a new palette.
//
function CopyPalette(Palette: HPALETTE): HPALETTE;
var
PaletteSize: Integer;
LogPal: TMaxLogPalette;
begin
Result := 0;
if Palette = 0 then Exit;
PaletteSize := 0;
if GetObject(Palette, SizeOf(PaletteSize), @PaletteSize) = 0 then Exit;
if PaletteSize = 0 then Exit;
with LogPal do
begin
palVersion := $0300;
palNumEntries := PaletteSize;
GetPaletteEntries(Palette, 0, PaletteSize, palPalEntry);
end;
Result := CreatePalette(PLogPalette(@LogPal)^);
end;
{$endif}
{$ifdef TransparentStretchBltMissing}
const
SOutOfResources = 'Out of system resources';
var
SystemPalette16: HPalette; // 16 color palette that maps to the system palette
procedure OutOfResources;
begin
raise EOutOfResources.Create(SOutOfResources);
end;
procedure GDIError;
var
ErrorCode: Integer;
Buf: array [Byte] of Char;
begin
ErrorCode := GetLastError;
if (ErrorCode <> 0) and (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, nil,
ErrorCode, LOCALE_USER_DEFAULT, Buf, sizeof(Buf), nil) <> 0) then
raise EOutOfResources.Create(Buf)
else
OutOfResources;
end;
function GDICheck(Value: Integer): Integer;
begin
if Value = 0 then GDIError;
Result := Value;
end;
function TransparentStretchBlt(DstDC: HDC; DstX, DstY, DstW, DstH: Integer;
SrcDC: HDC; SrcX, SrcY, SrcW, SrcH: Integer; MaskDC: HDC; MaskX,
MaskY: Integer): Boolean;
const
ROP_DstCopy = $00AA0029;
var
MemDC: HDC;
MemBmp: HBITMAP;
Save: THandle;
crText, crBack: TColorRef;
SavePal: HPALETTE;
begin
Result := True;
if (Win32Platform = VER_PLATFORM_WIN32_NT) and (SrcW = DstW) and (SrcH = DstH) then
begin
MemBmp := GDICheck(CreateCompatibleBitmap(SrcDC, 1, 1));
MemBmp := SelectObject(MaskDC, MemBmp);
try
MaskBlt(
DstDC, DstX, DstY, DstW, DstH,
SrcDC, SrcX, SrcY,
MemBmp, MaskX, MaskY,
MakeRop4(ROP_DstCopy, SrcCopy));
finally
MemBmp := SelectObject(MaskDC, MemBmp);
DeleteObject(MemBmp);
end;
Exit;
end;
SavePal := 0;
MemDC := GDICheck(CreateCompatibleDC(0));
try
MemBmp := GDICheck(CreateCompatibleBitmap(SrcDC, SrcW, SrcH));
Save := SelectObject(MemDC, MemBmp);
SavePal := SelectPalette(SrcDC, SystemPalette16, False);
SelectPalette(SrcDC, SavePal, False);
if SavePal <> 0 then
SavePal := SelectPalette(MemDC, SavePal, True)
else
SavePal := SelectPalette(MemDC, SystemPalette16, True);
RealizePalette(MemDC);
StretchBlt(MemDC, 0, 0, SrcW, SrcH, MaskDC, MaskX, MaskY, SrcW, SrcH, SrcCopy);
StretchBlt(MemDC, 0, 0, SrcW, SrcH, SrcDC, SrcX, SrcY, SrcW, SrcH, SrcErase);
crText := SetTextColor(DstDC, $0);
crBack := SetBkColor(DstDC, $FFFFFF);
StretchBlt(DstDC, DstX, DstY, DstW, DstH, MaskDC, MaskX, MaskY, SrcW, SrcH, SrcAnd);
StretchBlt(DstDC, DstX, DstY, DstW, DstH, MemDC, 0, 0, SrcW, SrcH, SrcInvert);
SetTextColor(DstDC, crText);
SetBkColor(DstDC, crBack);
if Save <> 0 then SelectObject(MemDC, Save);
DeleteObject(MemBmp);
finally
if SavePal <> 0 then SelectPalette(MemDC, SavePal, False);
DeleteDC(MemDC);
end;
end;
{$endif TransparentStretchBltMissing}
//-- BG ---------------------------------------------------------- 27.03.2011 --
procedure htAppendChr(var Dest: ThtString; C: ThtChar);
begin
SetLength(Dest, Length(Dest) + 1);
Dest[Length(Dest)] := C;
end;
//-- BG ---------------------------------------------------------- 27.03.2011 --
procedure htAppendStr(var Dest: ThtString; const S: ThtString);
var
L, N: Integer;
begin
L := Length(S);
if L > 0 then
begin
N := Length(Dest);
SetLength(Dest, N + L);
Move(S[1], Dest[N + 1], L * sizeof(ThtChar));
end;
end;
//-- BG ---------------------------------------------------------- 20.03.2011 --
function htCompareString(S1, S2: ThtString): Integer;
begin
{$ifdef UNICODE}
Result := CompareStr(S1, S2);
{$else}
Result := CompareStringW(LOCALE_USER_DEFAULT, 0, @S1[1], Length(S1), @S2[1], Length(S2)) - 2;
{$endif}
end;
//-- BG ---------------------------------------------------------- 28.01.2011 --
function htLowerCase(Str: ThtString): ThtString;
begin
{$ifdef UNICODE}
// LowerCase() converts 7bit chars only while AnsiLowerCase() converts UnicodeStrings correctly.
// Actually it does the same as we do in the $else part except for Linux.
Result := AnsiLowerCase(Str);
{$else}
Result := Str;
if Length(Result) > 0 then
CharLowerBuffW(@Result[1], Length(Result));
{$endif}
end;
//-- BG ---------------------------------------------------------- 27.03.2011 --
procedure htSetString(var Dest: ThtString; Chr: PhtChar; Len: Integer);
begin
{$ifdef UNICODE}
SetString(Dest, Chr, Len);
{$else}
SetLength(Dest, Len);
Move(Chr^, Dest[1], Len * sizeof(ThtChar));
{$endif}
end;
//-- BG ---------------------------------------------------------- 09.08.2011 --
function htTrim(Str: ThtString): ThtString;
{$ifdef UNICODE}
begin
Result := Trim(Str);
{$else}
var
I, L: Integer;
begin
L := Length(Str);
I := 1;
while (I <= L) and (Str[I] <= ' ') do
Inc(I);
if I > L then
Result := ''
else
begin
while Str[L] <= ' ' do
Dec(L);
Result := Copy(Str, I, L - I + 1);
end;
{$endif}
end;
//-- BG ---------------------------------------------------------- 28.01.2011 --
function htUpperCase(Str: ThtString): ThtString;
begin
{$ifdef UNICODE}
// UpperCase() converts 7bit chars only while AnsiUpperCase() converts UnicodeStrings correctly.
// Actually it does the same as we do in the $else part except for Linux.
Result := AnsiUpperCase(Str);
{$else}
Result := Str;
if Length(Result) > 0 then
CharUpperBuffW(@Result[1], Length(Result));
{$endif}
end;
//-- BG ---------------------------------------------------------- 21.08.2011 --
function IsAlpha(Ch: ThtChar): Boolean; {$ifdef UseInline} inline; {$endif}
begin
case Ch of
'a'..'z', 'A'..'Z':
Result := True;
else
Result := False;
end;
end;
//-- BG ---------------------------------------------------------- 21.08.2011 --
function IsDigit(Ch: ThtChar): Boolean; {$ifdef UseInline} inline; {$endif}
begin
case Ch of
'0'..'9':
Result := True;
else
Result := False;
end;
end;
{----------------RemoveQuotes}
function RemoveQuotes(const S: ThtString): ThtString;
{if ThtString is a quoted ThtString, remove the quotes (either ' or ")}
begin
Result := S;
if Length(Result) >= 2 then
begin
case Result[1] of
'"', '''':
if Result[Length(Result)] = Result[1] then
Result := Copy(Result, 2, Length(Result) - 2);
end;
end;
end;
function PosX(const SubStr, S: ThtString; Offset: Integer = 1): Integer;
{find substring in S starting at Offset}
var
S1: ThtString;
I: Integer;
begin
if Offset <= 1 then
Result := Pos(SubStr, S)
else
begin
S1 := Copy(S, Offset, Length(S) - Offset + 1);
I := Pos(SubStr, S1);
if I > 0 then
Result := I + Offset - 1
else
Result := 0;
end;
end;
function TextStartsWith(const SubStr, S : ThtString) : Boolean;
begin
Result := Copy(S,1,Length(SubStr)) = SubStr;
end;
function TextEndsWith(const SubStr, S : ThtString) : Boolean;
var l : Integer;
begin
l := Length(SubStr);
Result := Copy(S,Length(S)-l+1,l) = SubStr;
end;
{ ThtEdit }
procedure ThtEdit.KeyDown(var Key: Word; Shift: TShiftState);
begin
if (Key = Ord('A')) and ([ssCtrl] = Shift) then
SelectAll;
end;
{ ThtCanvas }
procedure ThtCanvas.htTextRect(const Rect: TRect; X, Y: Integer; const Text: ThtString);
{$ifdef LCL}
{$else}
var
Options: Longint;
{$endif LCL}
begin
{$ifdef LCL}
inherited TextRect(Rect, X, Y, Utf8Encode(Text));
{$else}
Changing;
RequiredState([csHandleValid, csFontValid, csBrushValid]);
Options := ETO_CLIPPED or TextFlags;
if Brush.Style <> bsClear then
Options := Options or ETO_OPAQUE;
if ((TextFlags and ETO_RTLREADING) <> 0) and
(CanvasOrientation = coRightToLeft) then Inc(X, TextWidth(Text) + 1);
Windows.ExtTextOutW(Handle, X, Y, Options, @Rect, PWideChar(Text), Length(Text), nil);
Changed;
{$endif LCL}
end;
{$ifdef LCL}
procedure DecodeStream(Input, Output: TStream);
const
BufferSize = 999;
var
Decoder: TBase64DecodingStream;
Buffer: array[1..BufferSize] of Byte;
Count: LongInt;
I, J: Integer;
begin
I := 0;
J := 0;
Decoder := TBase64DecodingStream.Create(Input, bdmMIME);
try
Decoder.Reset;
repeat
Count := Decoder.Read(Buffer[1], BufferSize);
Output.Write(Buffer[1], Count);
Inc(I);
Inc(J, Count);
until Count < BufferSize;
finally
Decoder.Free;
end;
end;
{$endif LCL}
{ initialization }
var
DC: HDC;
initialization
DC := GetDC(0);
try
ColorBits := GetDeviceCaps(DC, BitsPixel) * GetDeviceCaps(DC, Planes);
if ColorBits <= 4 then
ColorBits := 4
else if ColorBits <= 8 then
ColorBits := 8
else
ColorBits := 24;
ThePalette := 0;
if ColorBits = 8 then
CalcPalette(DC);
if ColorBits <= 8 then {use Palette Relative bit only when Palettes used}
PalRelative := $2000000
else
PalRelative := 0;
finally
ReleaseDC(0, DC);
end;
{$ifdef TransparentStretchBltMissing}
// Note: This doesn't return the same palette as the Delphi 3 system palette
// since the true system palette contains 20 entries and the Delphi 3 system
// palette only contains 16.
// For our purpose this doesn't matter since we do not care about the actual
// colors (or their number) in the palette.
// Stock objects doesn't have to be deleted.
SystemPalette16 := GetStockObject(DEFAULT_PALETTE);
{$endif}
{$ifdef FPC}
IsWin95 := False; // Use the same always with FPC
IsWin32Platform := False;
{$else}
IsWin95 := (Win32Platform = VER_PLATFORM_WIN32_WINDOWS) and (Win32MinorVersion in [0..9]);
IsWin32Platform := Win32Platform = VER_PLATFORM_WIN32_WINDOWS;
{$endif FPC}
finalization
if ThePalette <> 0 then
DeleteObject(ThePalette);
end. |
