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Unit RichTextStyleUnit;
{$mode objfpc}{$H+}
Interface
uses
Classes, fpg_base, fpg_main, CanvasFontManager, RichTextDocumentUnit;
type
TTextDrawStyle = record
FontNameSize: TfpgString;
FontAttributes: TFontAttributes;
Color: TfpgColor;
BackgroundColor: TfpgColor;
Alignment: TTextAlignment;
Wrap: boolean;
LeftMargin: longint;
RightMargin: longint;
end;
TMarginSizeStyle = ( msAverageCharWidth, msMaximumCharWidth, msSpecifiedChar );
TRichTextSettings = class( TfpgComponent )
protected
FHeading1Font: TfpgFont;
FHeading2Font: TfpgFont;
FHeading3Font: TfpgFont;
FFixedFont: TfpgFont;
FNormalFont: TfpgFont;
FDefaultBackgroundColor: TfpgColor;
FDefaultColor: TfpgColor;
FDefaultAlignment: TTextAlignment;
FDefaultWrap: boolean;
FAtLeastOneWordBeforeWrap: boolean;
FMarginSizeStyle: TMarginSizeStyle;
FMarginChar: longint;
FOnChange: TNotifyEvent;
FMargins: TRect;
FUpdateCount: longint;
FChangesPending: boolean;
Procedure Change;
Procedure SetNormalFont( NewFont: TfpgFont );
Procedure SetFixedFont( NewFont: TfpgFont );
Procedure SetHeading1Font( NewFont: TfpgFont );
Procedure SetHeading2Font( NewFont: TfpgFont );
Procedure SetHeading3Font( NewFont: TfpgFont );
Procedure SetDefaultColor( NewColor: TfpgColor );
Procedure SetDefaultBackgroundColor( NewColor: TfpgColor );
Procedure SetDefaultAlignment( Alignment: TTextAlignment );
Procedure SetDefaultWrap( Wrap: boolean );
Procedure SetAtLeastOneWordBeforeWrap( NewValue: boolean );
Procedure SetMarginSizeStyle( NewValue: TMarginSizeStyle );
Procedure SetMarginChar( NewValue: longint );
Procedure SetMargins( const NewMargins: TRect );
function GetMargin_Left: longint;
Procedure SetMargin_Left( NewValue: longint );
function GetMargin_Bottom: longint;
Procedure SetMargin_Bottom( NewValue: longint );
function GetMargin_Right: longint;
Procedure SetMargin_Right( NewValue: longint );
function GetMargin_Top: longint;
Procedure SetMargin_Top( NewValue: longint );
Procedure SetupComponent;
Procedure AssignFont(var AFont: TfpgFont; NewFont: TfpgFont);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure BeginUpdate;
procedure EndUpdate;
property Margins: TRect read FMargins write SetMargins;
property Heading1Font: TfpgFont read FHeading1Font write SetHeading1Font;
property Heading2Font: TfpgFont read FHeading2Font write SetHeading2Font;
property Heading3Font: TfpgFont read FHeading3Font write SetHeading3Font;
property FixedFont: TfpgFont read FFixedFont write SetFixedFont;
property NormalFont: TfpgFont read FNormalFont write SetNormalFont;
property OnChange: TNotifyEvent read FOnChange write FOnChange;
published
property DefaultBackgroundColor: TfpgColor read FDefaultBackgroundColor write SetDefaultBackgroundColor;
property DefaultColor: TfpgColor read FDefaultColor write SetDefaultColor;
property DefaultAlignment: TTextAlignment read FDefaultAlignment write SetDefaultAlignment;
property DefaultWrap: boolean read FDefaultWrap write SetDefaultWrap default True;
property AtLeastOneWordBeforeWrap: boolean read FAtLeastOneWordBeforeWrap write SetAtLeastOneWordBeforeWrap;
property MarginSizeStyle: TMarginSizeStyle read FMarginSizeStyle write SetMarginSizeStyle;
property MarginChar: longint read FMarginChar write SetMarginChar;
// margins are exposed as individual properties here
// since the Sibyl IDE cannot cope with editing a record property
// within a class property (as in RichTextView)
property Margin_Left: longint read GetMargin_Left write SetMargin_Left;
property Margin_Bottom: longint read GetMargin_Bottom write SetMargin_Bottom;
property Margin_Right: longint read GetMargin_Right write SetMargin_Right;
property Margin_Top: longint read GetMargin_Top write SetMargin_Top;
end;
Procedure ApplyStyle( var Style: TTextDrawStyle;
FontManager: TCanvasFontManager );
Procedure ApplyStyleTag( const Tag: TTag;
Var Style: TTextDrawStyle;
FontManager: TCanvasFontManager;
const ASettings: TRichTextSettings;
const X: longint );
function GetDefaultStyle( const ASettings: TRichTextSettings ): TTextDrawStyle;
Implementation
uses
SysUtils,
ACLStringUtility,
nvUtilities,
SettingsUnit;
Procedure ApplyStyle(var Style: TTextDrawStyle; FontManager: TCanvasFontManager);
var
s: string;
begin
ProfileEvent('DEBUG: ApplyStyle >>>');
assert(FontManager <> nil, 'FontManager should not have been nil');
s := Style.FontNameSize;
ApplyFontAttributes(s, Style.FontAttributes);
FontManager.SetFont(s);
FontManager.Canvas.TextColor := Style.Color;
ProfileEvent('DEBUG: ApplyStyle <<<');
end;
Procedure ApplyStyleTag( Const Tag: TTag;
var Style: TTextDrawStyle;
FontManager: TCanvasFontManager;
const ASettings: TRichTextSettings;
const X: longint );
var
MarginParam1: string;
MarginParam2: string;
NewMargin: longint;
FontFaceName: string;
FontSizeString: string;
NewStyle: TTextDrawStyle;
ParseIndex: longint;
XSizeStr: string;
YSizeStr: string;
tmpFontParts : TStrings;
MarginSize: longint;
ParsePoint: longint;
begin
ProfileEvent('DEBUG: ApplyStyleTag >>>');
case Tag.TagType of
ttBold:
Include( Style.FontAttributes, faBold );
ttBoldOff:
Exclude( Style.FontAttributes, faBold );
ttItalic:
Include( Style.FontAttributes, faItalic );
ttItalicOff:
Exclude( Style.FontAttributes, faItalic );
ttUnderline:
Include( Style.FontAttributes, faUnderscore );
ttUnderlineOff:
Exclude( Style.FontAttributes, faUnderscore );
ttFixedWidthOn:
begin
Style.FontNameSize := Copy(ASettings.FixedFont.FontDesc, 1, Pos(':', ASettings.FixedFont.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.FixedFont);
end;
ttFixedWidthOff:
begin
Style.FontNameSize := Copy(ASettings.NormalFont.FontDesc, 1, Pos(':', ASettings.NormalFont.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.NormalFont);
end;
ttHeading1:
begin
Style.FontNameSize := Copy(ASettings.Heading1Font.FontDesc, 1, Pos(':', ASettings.Heading1Font.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.Heading1Font);
end;
ttHeading2:
begin
Style.FontNameSize := Copy(ASettings.Heading2Font.FontDesc, 1, Pos(':', ASettings.Heading2Font.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.Heading2Font);
end;
ttHeading3:
begin
Style.FontNameSize := Copy(ASettings.Heading3Font.FontDesc, 1, Pos(':', ASettings.Heading3Font.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.Heading3Font);
end;
ttHeading1Off,
ttHeading2Off,
ttHeading3Off:
begin
Style.FontNameSize := Copy(ASettings.NormalFont.FontDesc, 1, Pos(':', ASettings.NormalFont.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.NormalFont);
end;
ttFont:
begin
tmpFontParts := TStringList.Create;
StrExtractStringsQuoted(tmpFontParts, Tag.Arguments);
FontFaceName := tmpFontParts[0];
if tmpFontParts.Count=2 then
FontSizeString := tmpFontParts[1];
tmpFontParts.Free;
NewStyle := Style;
NewStyle.FontNameSize := FontFaceName;
if Pos( 'x', FontSizeString ) > 0 then
begin
tmpFontParts := TStringList.Create;
StrExtractStrings(tmpFontParts, FontSizeString, ['x'], #0);
XSizeStr := tmpFontParts[0];
YSizeStr := tmpFontParts[1];
tmpFontParts.Destroy;
// This probably needs to be enhanced to extract the font name and size first.
NewStyle.FontNameSize := NewStyle.FontNameSize + '-' + YSizeStr;
end
else if (FontSizeString<>'') then
// Same here
NewStyle.FontNameSize := NewStyle.FontNameSize + '-' + FontSizeString;
if ( NewStyle.FontNameSize <> '' ) then
Style := NewStyle;
end;
ttFontOff:
begin
{ TODO: Restore to previous font, not NormalFont, because previous font could have
been something different to NormalFont }
Style.FontNameSize := Copy(ASettings.NormalFont.FontDesc, 1, Pos(':', ASettings.NormalFont.FontDesc)-1);
Style.FontAttributes := GetFPGuiFontAttributes(ASettings.NormalFont);
end;
ttColor:
GetTagColor( Tag.Arguments, Style.Color );
ttColorOff,
ttRedOff,
ttGreenOff,
ttBlackOff,
ttBlueOff:
Style.Color := ASettings.FDefaultColor;
ttBackgroundColor:
GetTagColor( Tag.Arguments, Style.BackgroundColor );
ttBackgroundColorOff:
Style.BackgroundColor := ASettings.FDefaultBackgroundColor;
ttRed:
Style.Color := clRed;
ttBlue:
Style.Color := clBlue;
ttGreen:
Style.Color := clGreen;
ttBlack:
Style.Color := clBlack;
ttAlign:
Style.Alignment := GetTagTextAlignment( Tag.Arguments, ASettings.FDefaultAlignment );
ttNoWrap:
Style.Wrap := False;
ttNoWrapOff:
Style.Wrap := True;
ttSetLeftMargin,
ttSetRightMargin:
begin
tmpFontParts := TStringList.Create;
StrExtractStrings(tmpFontParts, Tag.Arguments, [' '], #0);
MarginParam1 := tmpFontParts[0];
ParsePoint := 1;
if ( Tag.TagType = ttSetLeftMargin )
and ( MarginParam1 = 'here' ) then
begin
Style.LeftMargin := X;
end
else
begin
try
MarginSize := StrToInt( MarginParam1 );
if tmpFontParts.Count > 1 then // do we have a second parameter
MarginParam2 := tmpFontParts[1]
else
MarginParam2 := '';
if MarginParam2 = 'pixels' then
NewMargin := MarginSize
else if MarginParam2 = 'deffont' then
NewMargin := MarginSize * ASettings.NormalFont.TextWidth('w') // .Width
else
begin
case ASettings.MarginSizeStyle of
msAverageCharWidth:
NewMargin := MarginSize * FontManager.AverageCharWidth;
msMaximumCharWidth:
NewMargin := MarginSize * FontManager.MaximumCharWidth;
msSpecifiedChar:
NewMargin := MarginSize * FontManager.CharWidth(Chr(ASettings.MarginChar));
end;
end;
except
NewMargin := 0;
end;
if Tag.TagType = ttSetLeftMargin then
Style.LeftMargin := ASettings.Margins.Left + NewMargin
else
Style.RightMargin := ASettings.Margins.Right + NewMargin;
end;
tmpFontParts.Free;
end; { teSet[left|right]margin }
end; { case Tag.TagType }
ApplyStyle( Style, FontManager );
ProfileEvent('DEBUG: ApplyStyleTag <<<');
end;
function GetDefaultStyle( const ASettings: TRichTextSettings ): TTextDrawStyle;
begin
FillChar(Result, SizeOf(TTextDrawStyle), 0);
Result.FontNameSize := ASettings.NormalFont.FontDesc;
Result.FontAttributes := [];
Result.Alignment := ASettings.FDefaultAlignment;
Result.Wrap := ASettings.FDefaultWrap;
Result.Color := ASettings.FDefaultColor;
Result.BackgroundColor := ASettings.FDefaultBackgroundColor;
Result.LeftMargin := ASettings.Margins.Left;
Result.RightMargin := ASettings.Margins.Right;
end;
Procedure TRichTextSettings.SetupComponent;
begin
Name := 'RichTextSettings';
FNormalFont := fpgGetFont(Settings.NormalFontDesc);
FFixedFont := fpgGetFont(Settings.FixedFontDesc);
FHeading1Font := fpgGetFont(DefaultTopicFontName + '-20');
FHeading2Font := fpgGetFont(DefaultTopicFontName + '-14');
FHeading3Font := fpgGetFont(DefaultTopicFontName + '-10:bold');
FDefaultColor := clBlack;
FDefaultBackgroundColor := clWhite;
FDefaultAlignment := taLeft;
FDefaultWrap := true;
FAtLeastOneWordBeforeWrap := false;
{ TODO: Add this property to DocView's Preferences dialog }
FMarginSizeStyle := msAverageCharWidth;
FMarginChar := Ord( ' ' );
FMargins.Left := 0;
FMargins.Right := 0;
FMargins.Top := 0;
FMargins.Bottom := 0;
FUpdateCount := 0;
FChangesPending := false;
end;
constructor TRichTextSettings.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
SetupComponent;
end;
destructor TRichTextSettings.Destroy;
begin
FNormalFont.Free;
FFixedFont.Free;
FHeading1Font.Free;
FHeading2Font.Free;
FHeading3Font.Free;
Inherited Destroy;
end;
Procedure TRichTextSettings.Change;
begin
if FUpdateCount > 0 then
begin
FChangesPending := true;
exit;
end;
if FOnChange <> nil then
FOnChange( self );
end;
Procedure TRichTextSettings.SetDefaultAlignment( Alignment: TTextAlignment );
begin
if Alignment = FDefaultAlignment then
exit; // no change
FDefaultAlignment := Alignment;
Change;
end;
Procedure TRichTextSettings.SetDefaultWrap( Wrap: boolean );
begin
if Wrap = FDefaultWrap then
exit; // no change
FDefaultWrap := Wrap;
Change;
end;
Procedure TRichTextSettings.SetAtLeastOneWordBeforeWrap( NewValue: boolean );
begin
if NewValue = FAtLeastOneWordBeforeWrap then
exit; // no change
FAtLeastOneWordBeforeWrap := NewValue;
Change;
end;
Procedure TRichTextSettings.SetMarginChar( NewValue: longint );
begin
if NewValue = FMarginChar then
exit; // no change
FMarginChar := NewValue;
if FMarginSizeStyle <> msSpecifiedChar then
// doesn't matter, will be ignored
exit;
Change;
end;
Procedure TRichTextSettings.SetMarginSizeStyle( NewValue: TMarginSizeStyle );
begin
if NewValue = FMarginSizeStyle then
exit; // no change
FMarginSizeStyle := NewValue;
Change;
end;
Function FontSame( FontA: TfpgFont; FontB: TfpgFont ): boolean;
begin
if ( FontA = nil ) or ( FontB = nil ) then
Result := False
else
Result := FontA.FontDesc = FontB.FontDesc;
end;
Procedure TRichTextSettings.AssignFont(var AFont: TfpgFont; NewFont: TfpgFont );
begin
If NewFont = Nil Then
NewFont := fpgApplication.DefaultFont;
if FontSame( NewFont, AFont ) then
begin
if AFont <> NewFont then { they are not the same instance }
NewFont.Free;
Exit; // no change needed
end;
AFont.Free;
AFont := NewFont;
Change;
End;
Procedure TRichTextSettings.SetHeading1Font( NewFont: TfpgFont );
begin
AssignFont( FHeading1Font, NewFont );
end;
Procedure TRichTextSettings.SetHeading2Font( NewFont: TfpgFont );
begin
AssignFont( FHeading2Font, NewFont );
End;
Procedure TRichTextSettings.SetHeading3Font( NewFont: TfpgFont );
begin
AssignFont( FHeading3Font, NewFont );
End;
Procedure TRichTextSettings.SetFixedFont( NewFont: TfpgFont );
begin
AssignFont( FFixedFont, NewFont );
end;
Procedure TRichTextSettings.SetNormalFont( NewFont: TfpgFont );
begin
AssignFont( FNormalFont, NewFont );
end;
Procedure TRichTextSettings.SetMargins( const NewMargins: TRect );
begin
if NewMargins = FMargins then
exit; // no change
FMargins := NewMargins;
Change;
end;
function TRichTextSettings.GetMargin_Left: longint;
begin
Result := FMargins.Left;
end;
Procedure TRichTextSettings.SetMargin_Left( NewValue: longint );
begin
FMargins.Left := NewValue;
end;
function TRichTextSettings.GetMargin_Bottom: longint;
begin
Result := FMargins.Bottom;
end;
Procedure TRichTextSettings.SetMargin_Bottom( NewValue: longint );
begin
FMargins.Bottom := NewValue;
end;
function TRichTextSettings.GetMargin_Right: longint;
begin
Result := FMargins.Right;
end;
Procedure TRichTextSettings.SetMargin_Right( NewValue: longint );
begin
FMargins.Right := NewValue;
end;
function TRichTextSettings.GetMargin_Top: longint;
begin
Result := FMargins.Top;
end;
Procedure TRichTextSettings.SetMargin_Top( NewValue: longint );
begin
FMargins.Top := NewValue;
end;
Procedure TRichTextSettings.SetDefaultColor( NewColor: TfpgColor );
begin
if NewColor = FDefaultColor then
exit;
FDefaultColor := NewColor;
Change;
end;
Procedure TRichTextSettings.SetDefaultBackgroundColor( NewColor: TfpgColor );
begin
if NewColor = FDefaultBackgroundColor then
exit;
FDefaultBackgroundColor := NewColor;
Change;
end;
procedure TRichTextSettings.BeginUpdate;
begin
inc( FUpdateCount );
end;
procedure TRichTextSettings.EndUpdate;
begin
if FUpdateCount = 0 then
exit;
dec( FUpdateCount );
if FUpdateCount = 0 then
begin
if FChangesPending then
begin
Change;
FChangesPending := false;
end;
end;
end;
initialization
RegisterClasses([TRichTextSettings]);
end.
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