1 | Unit RichTextStyleUnit;
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2 |
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3 | Interface
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4 |
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5 | uses
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6 | Forms, Classes, Graphics, CanvasFontManager, RichTextDocumentUnit;
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7 |
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8 | type
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9 | TTextDrawStyle = record
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10 | Font: TFontSpec;
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11 | Color: TColor;
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12 | BackgroundColor: TColor;
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13 | Alignment: TTextAlignment;
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14 | Wrap: boolean;
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15 | LeftMargin: longint;
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16 | RightMargin: longint;
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17 | end;
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18 |
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19 | TMarginSizeStyle = ( msAverageCharWidth, msMaximumCharWidth, msSpecifiedChar );
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20 |
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21 | TRichTextSettings = class( TComponent )
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22 | protected
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23 | FHeading1Font: TFont;
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24 | FHeading2Font: TFont;
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25 | FHeading3Font: TFont;
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26 |
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27 | FFixedFont: TFont;
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28 | FNormalFont: TFont;
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29 |
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30 | FDefaultBackgroundColor: TColor;
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31 | FDefaultColor: TColor;
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32 |
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33 | FDefaultAlignment: TTextAlignment;
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34 | FDefaultWrap: boolean;
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35 |
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36 | FAtLeastOneWordBeforeWrap: boolean;
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37 |
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38 | FMarginSizeStyle: TMarginSizeStyle;
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39 | FMarginChar: longint;
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40 |
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41 | FOnChange: TNotifyEvent;
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42 |
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43 | FMargins: TRect;
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44 |
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45 | FUpdateCount: longint;
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46 | FChangesPending: boolean;
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47 |
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48 | Procedure Change;
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49 |
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50 | Procedure SetNormalFont( NewFont: TFont );
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51 | Procedure SetFixedFont( NewFont: TFont );
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52 | Procedure SetHeading1Font( NewFont: TFont );
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53 | Procedure SetHeading2Font( NewFont: TFont );
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54 | Procedure SetHeading3Font( NewFont: TFont );
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55 |
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56 | Procedure SetDefaultColor( NewColor: TColor );
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57 | Procedure SetDefaultBackgroundColor( NewColor: TColor );
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58 |
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59 | Procedure SetDefaultAlignment( Alignment: TTextAlignment );
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60 | Procedure SetDefaultWrap( Wrap: boolean );
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61 | Procedure SetAtLeastOneWordBeforeWrap( NewValue: boolean );
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62 |
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63 | Procedure SetMarginSizeStyle( NewValue: TMarginSizeStyle );
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64 | Procedure SetMarginChar( NewValue: longint );
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65 |
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66 | Procedure SetMargins( const NewMargins: TRect );
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67 |
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68 | function GetMargin_Left: longint;
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69 | Procedure SetMargin_Left( NewValue: longint );
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70 | function GetMargin_Bottom: longint;
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71 | Procedure SetMargin_Bottom( NewValue: longint );
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72 | function GetMargin_Right: longint;
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73 | Procedure SetMargin_Right( NewValue: longint );
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74 | function GetMargin_Top: longint;
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75 | Procedure SetMargin_Top( NewValue: longint );
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76 |
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77 | Procedure SetupComponent; override;
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78 | destructor Destroy; override;
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79 |
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80 | Procedure AssignFont( Var Font: TFont;
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81 | NewFont: TFont );
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82 |
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83 | // Hide properties...
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84 | property Name;
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85 |
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86 | public
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87 | property OnChange: TNotifyEvent read FOnChange write FOnChange;
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88 |
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89 | procedure BeginUpdate;
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90 | procedure EndUpdate;
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91 |
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92 | // Stream in/out
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93 | Procedure ReadSCUResource( Const ResName: TResourceName;
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94 | Var Data;
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95 | DataLen: LongInt ); override;
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96 | Function WriteSCUResource( Stream: TResourceStream ): boolean; override;
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97 |
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98 | property Margins: TRect read FMargins write SetMargins;
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99 |
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100 | property Heading1Font: TFont read FHeading1Font write SetHeading1Font;
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101 | property Heading2Font: TFont read FHeading2Font write SetHeading2Font;
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102 | property Heading3Font: TFont read FHeading3Font write SetHeading3Font;
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103 | property FixedFont: TFont read FFixedFont write SetFixedFont;
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104 | property NormalFont: TFont read FNormalFont write SetNormalFont;
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105 |
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106 | published
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107 |
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108 | property DefaultBackgroundColor: TColor read FDefaultBackgroundColor write SetDefaultBackgroundColor;
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109 | property DefaultColor: TColor read FDefaultColor write SetDefaultColor;
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110 |
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111 | property DefaultAlignment: TTextAlignment read FDefaultAlignment write SetDefaultAlignment;
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112 | property DefaultWrap: boolean read FDefaultWrap write SetDefaultWrap;
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113 | property AtLeastOneWordBeforeWrap: boolean read FAtLeastOneWordBeforeWrap write SetAtLeastOneWordBeforeWrap;
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114 |
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115 | property MarginSizeStyle: TMarginSizeStyle read FMarginSizeStyle write SeTMarginSizeStyle;
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116 | property MarginChar: longint read FMarginChar write SetMarginChar;
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117 |
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118 | // margins are exposed as individual properties here
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119 | // since the Sibyl IDE cannot cope with editing a record property
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120 | // within a class property (as in RichTextView)
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121 | property Margin_Left: longint read GetMargin_Left write SetMargin_Left;
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122 | property Margin_Bottom: longint read GetMargin_Bottom write SetMargin_Bottom;
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123 | property Margin_Right: longint read GetMargin_Right write SetMargin_Right;
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124 | property Margin_Top: longint read GetMargin_Top write SetMargin_Top;
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125 | end;
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126 |
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127 | // pRichTextSettings = ^TRichTextSettings;
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128 | Procedure ApplyStyle( const Style: TTextDrawStyle;
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129 | FontManager: TCanvasFontManager );
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130 |
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131 | Procedure ApplyStyleTag( const Tag: TTag;
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132 | Var Style: TTextDrawStyle;
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133 | FontManager: TCanvasFontManager;
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134 | const Settings: TRichTextSettings;
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135 | const X: longint );
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136 |
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137 | function GetDefaultStyle( const Settings: TRichTextSettings ): TTextDrawStyle;
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138 |
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139 | Exports
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140 | TRichTextSettings,'User','';
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141 |
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142 | Implementation
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143 |
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144 | uses
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145 | SysUtils,
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146 | ACLStringUtility;
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147 | // ACLProfile;
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148 |
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149 | Procedure ApplyStyle( const Style: TTextDrawStyle;
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150 | FontManager: TCanvasFontManager );
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151 | begin
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152 | FontManager.SetFont( Style.Font );
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153 | FontManager.Canvas.Pen.Color := Style.Color;
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154 | end;
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155 |
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156 | Procedure ApplyStyleTag( Const Tag: TTag;
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157 | Var Style: TTextDrawStyle;
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158 | FontManager: TCanvasFontManager;
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159 | const Settings: TRichTextSettings;
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160 | const X: longint );
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161 | var
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162 | MarginParam1: string;
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163 | MarginParam2: string;
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164 | NewMargin: longint;
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165 | FontFaceName: string;
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166 | FontSizeString: string;
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167 | NewStyle: TTextDrawStyle;
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168 | ParseIndex: longint;
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169 | XSizeStr: string;
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170 | YSizeStr: string;
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171 |
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172 | MarginSize: longint;
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173 | ParsePoint: longint;
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174 | begin
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175 | case Tag.TagType of
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176 | ttBold:
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177 | Include( Style.Font.Attributes, faBold );
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178 | ttBoldOff:
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179 | Exclude( Style.Font.Attributes, faBold );
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180 | ttItalic:
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181 | Include( Style.Font.Attributes, faItalic );
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182 | ttItalicOff:
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183 | Exclude( Style.Font.Attributes, faItalic );
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184 | ttUnderline:
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185 | Include( Style.Font.Attributes, faUnderscore );
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186 | ttUnderlineOff:
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187 | Exclude( Style.Font.Attributes, faUnderscore );
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188 |
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189 | ttFixedWidthOn:
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190 | SibylFontToFontSpec( Settings.FFixedFont, Style.Font );
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191 | ttFixedWidthOff:
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192 | SibylFontToFontSpec( Settings.FNormalFont, Style.Font );
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193 |
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194 | ttHeading1:
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195 | SibylFontToFontSpec( Settings.FHeading1Font, Style.Font );
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196 | ttHeading2:
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197 | SibylFontToFontSpec( Settings.FHeading2Font, Style.Font );
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198 | ttHeading3:
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199 | SibylFontToFontSpec( Settings.FHeading3Font, Style.Font );
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200 | ttHeadingOff:
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201 | SibylFontToFontSpec( Settings.FNormalFont, Style.Font );
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202 |
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203 | ttFont:
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204 | begin
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205 | ParseIndex := 1;
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206 | GetNextQuotedValue( Tag.Arguments, ParseIndex, FontFaceName, DoubleQuote );
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207 | GetNextQuotedValue( Tag.Arguments, ParseIndex, FontSizeString, DoubleQuote );
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208 | NewStyle := Style;
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209 | try
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210 | NewStyle.Font.FaceName := FontFaceName;
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211 |
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212 | if Pos( 'x', FontSizeString ) > 0 then
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213 | begin
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214 | XSizeStr := ExtractNextValue( FontSizeString, 'x' );
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215 | YSizeStr := FontSizeString;
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216 | NewStyle.Font.XSize := StrToInt( XSizeStr );
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217 | NewStyle.Font.YSize := StrToInt( YSizeStr );
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218 | NewStyle.Font.PointSize := 0;
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219 | end
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220 | else
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221 | begin
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222 | NewStyle.Font.PointSize := StrToInt( FontSizeString );
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223 | end;
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224 |
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225 | if ( NewStyle.Font.FaceName <> '' )
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226 | and ( NewStyle.Font.PointSize >= 1 ) then
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227 | begin
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228 | Style := NewStyle;
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229 | end;
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230 |
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231 | except
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232 | end;
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233 | end;
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234 |
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235 | ttFontOff:
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236 | // restore default
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237 | SibylFontToFontSpec( Settings.FNormalFont, Style.Font );
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238 |
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239 | ttColor:
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240 | GetTagColor( Tag.Arguments, Style.Color );
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241 | ttColorOff:
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242 | Style.Color := Settings.FDefaultColor;
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243 | ttBackgroundColor:
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244 | GetTagColor( Tag.Arguments, Style.BackgroundColor );
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245 | ttBackgroundColorOff:
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246 | Style.BackgroundColor := Settings.FDefaultBackgroundColor;
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247 |
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248 | ttRed:
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249 | Style.Color := clRed;
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250 | ttBlue:
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251 | Style.Color := clBlue;
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252 | ttGreen:
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253 | Style.Color := clGreen;
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254 | ttBlack:
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255 | Style.Color := clBlack;
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256 |
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257 | ttAlign:
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258 | Style.Alignment := GetTagTextAlignment( Tag.Arguments,
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259 | Settings.FDefaultAlignment );
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260 |
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261 | ttWrap:
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262 | Style.Wrap := GetTagTextWrap( Tag.Arguments );
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263 |
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264 | ttSetLeftMargin,
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265 | ttSetRightMargin:
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266 | begin
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267 | ParsePoint := 1;
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268 | GetNextValue( Tag.Arguments, ParsePoint, MarginParam1, ' ' );
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269 | if ( Tag.TagType = ttSetLeftMargin )
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270 | and ( MarginParam1 = 'here' ) then
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271 | begin
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272 | Style.LeftMargin := X div FontWidthPrecisionFactor;
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273 | end
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274 | else
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275 | begin
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276 | try
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277 | MarginSize := StrToInt( MarginParam1 );
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278 | GetNextValue( Tag.Arguments, ParsePoint, MarginParam2, ' ' );
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279 | if MarginParam2 = 'pixels' then
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280 | NewMargin := MarginSize
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281 |
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282 | else if MarginParam2 = 'deffont' then
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283 | NewMargin := MarginSize
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284 | * Settings.NormalFont.Width
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285 |
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286 | else
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287 | begin
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288 | case Settings.MarginSizeStyle of
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289 | msAverageCharWidth:
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290 | NewMargin := MarginSize * FontManager.AverageCharWidth;
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291 | msMaximumCharWidth:
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292 | NewMargin := MarginSize * FontManager.MaximumCharWidth;
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293 | msSpecifiedChar:
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294 | NewMargin := MarginSize
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295 | * FontManager.CharWidth( Chr( Settings.MarginChar ) )
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296 | div FontWidthPrecisionFactor;
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297 | end;
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298 | end;
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299 | except
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300 | NewMargin := 0;
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301 | end;
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302 |
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303 | if Tag.TagType = ttSetLeftMargin then
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304 | Style.LeftMargin := Settings.Margins.Left
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305 | + NewMargin
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306 | else
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307 | Style.RightMargin := Settings.Margins.Right
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308 | + NewMargin;
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309 | end;
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310 | end;
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311 |
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312 | end;
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313 |
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314 | ApplyStyle( Style, FontManager );
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315 |
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316 | end;
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317 |
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318 | function GetDefaultStyle( const Settings: TRichTextSettings ): TTextDrawStyle;
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319 | begin
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320 | SibylFontToFontSpec( Settings.FNormalFont, Result.Font );
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321 | Result.Alignment := Settings.FDefaultAlignment;
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322 | Result.Wrap := Settings.FDefaultWrap;
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323 | Result.Color := Settings.FDefaultColor;
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324 | Result.BackgroundColor := Settings.FDefaultBackgroundColor;
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325 | Result.LeftMargin := Settings.Margins.Left;
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326 | Result.RightMargin := Settings.Margins.Right;
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327 | end;
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328 |
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329 | Procedure GetStartupFont( Var Font: TFont;
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330 | Const Face: string;
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331 | Const Size: longint );
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332 | begin
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333 | Font := Screen.CreateCompatibleFont( Screen.GetFontFromPointSize( Face, Size ) );
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334 | ReferenceFont( Font );
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335 | Font.AutoDestroy := true;
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336 | end;
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337 |
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338 | Procedure TRichTextSettings.SetupComponent;
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339 | begin
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340 | inherited SetupComponent;
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341 |
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342 | Name := 'RichTextSettings';
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343 |
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344 | GetStartupFont( FNormalFont, 'Helv', 8 );
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345 | GetStartupFont( FFixedFont, 'Courier', 8 );
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346 | GetStartupFont( FHeading1Font, 'Helv', 18 );
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347 | GetStartupFont( FHeading2Font, 'Helv', 12 );
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348 | GetStartupFont( FHeading3Font, 'Helv', 8 );
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349 | FHeading3Font.Attributes := [ faBold ];
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350 |
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351 | FDefaultColor := clBlack;
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352 | FDefaultBackgroundColor := clWhite;
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353 |
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354 | FDefaultAlignment := taLeft;
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355 | FDefaultWrap := true;
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356 | FAtLeastOneWordBeforeWrap := false;
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357 |
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358 | FMarginSizeStyle := msMaximumCharWidth;
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359 | FMarginChar := Ord( ' ' );
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360 |
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361 | FMargins.Left := 0;
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362 | FMargins.Right := 0;
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363 | FMargins.Top := 0;
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364 | FMargins.Bottom := 0;
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365 |
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366 | FUpdateCount := 0;
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367 | FChangesPending := false;
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368 | end;
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369 |
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370 | destructor TRichTextSettings.Destroy;
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371 | begin
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372 | DereferenceFont( FNormalFont );
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373 | DereferenceFont( FFixedFont );
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374 | DereferenceFont( FHeading1Font );
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375 | DereferenceFont( FHeading2Font );
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376 | DereferenceFont( FHeading3Font );
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377 |
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378 | Inherited Destroy;
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379 | end;
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380 |
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381 | // Font read/write from SCU. I have NO IDEA why I have to do this manually. But
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382 | // this way works and everything else I tried doesn't
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383 | Procedure TRichTextSettings.ReadSCUResource( Const ResName: TResourceName;
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384 | Var Data;
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385 | DataLen: LongInt );
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386 | Begin
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387 | If ResName = 'Heading1Font' Then
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388 | Begin
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389 | If DataLen <> 0 Then
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390 | FHeading1Font := ReadSCUFont( Data, DataLen );
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391 | End
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392 | Else If ResName = 'Heading2Font' Then
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393 | Begin
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394 | If DataLen <> 0 Then
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395 | FHeading2Font := ReadSCUFont( Data, DataLen );
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396 | End
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397 | Else If ResName = 'Heading3Font' Then
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398 | Begin
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399 | If DataLen <> 0 Then
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400 | FHeading3Font := ReadSCUFont( Data, DataLen );
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401 | End
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402 | Else If ResName = 'FixedFont' Then
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403 | Begin
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404 | If DataLen <> 0 Then
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405 | FFixedFont := ReadSCUFont( Data, DataLen );
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406 | End
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407 | Else if ResName = 'NormalFont' then
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408 | Begin
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409 | If DataLen <> 0 Then
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410 | FNormalFont := ReadSCUFont( Data, DataLen );
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411 | End
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412 | Else
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413 | Inherited ReadSCUResource( ResName, Data, DataLen );
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414 | End;
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415 |
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416 | Function TRichTextSettings.WriteSCUResource( Stream: TResourceStream ): boolean;
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417 | begin
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418 | Result := Inherited WriteSCUResource( Stream );
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419 | If Not Result Then
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420 | Exit;
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421 |
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422 | If FHeading1Font <> Nil then
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423 | Result := FHeading1Font.WriteSCUResourceName( Stream, 'Heading1Font' );
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424 | If FHeading2Font <> Nil then
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425 | Result := FHeading2Font.WriteSCUResourceName( Stream, 'Heading2Font' );
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426 | If FHeading3Font <> Nil then
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427 | Result := FHeading3Font.WriteSCUResourceName( Stream, 'Heading3Font' );
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428 | If FFixedFont <> Nil then
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429 | Result := FFixedFont.WriteSCUResourceName( Stream, 'FixedFont' );
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430 | If FNormalFont <> Nil then
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431 | Result := FNormalFont.WriteSCUResourceName( Stream, 'NormalFont' );
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432 |
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433 | end;
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434 |
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435 | Procedure TRichTextSettings.Change;
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436 | begin
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437 | if FUpdateCount > 0 then
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438 | begin
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439 | FChangesPending := true;
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440 | exit;
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441 | end;
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442 |
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443 | if FOnChange <> nil then
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444 | FOnChange( self );
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445 | end;
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446 |
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447 | Procedure TRichTextSettings.SetDefaultAlignment( Alignment: TTextAlignment );
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448 | begin
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449 | if Alignment = FDefaultAlignment then
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450 | exit; // no change
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451 |
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452 | FDefaultAlignment := Alignment;
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453 | Change;
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454 | end;
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455 |
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456 | Procedure TRichTextSettings.SetDefaultWrap( Wrap: boolean );
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457 | begin
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458 | if Wrap = FDefaultWrap then
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459 | exit; // no change
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460 |
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461 | FDefaultWrap := Wrap;
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462 | Change;
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463 | end;
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464 |
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465 | Procedure TRichTextSettings.SetAtLeastOneWordBeforeWrap( NewValue: boolean );
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466 | begin
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467 | if NewValue = FAtLeastOneWordBeforeWrap then
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468 | exit; // no change
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469 |
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470 | FAtLeastOneWordBeforeWrap := NewValue;
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471 | Change;
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472 | end;
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473 |
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474 | Procedure TRichTextSettings.SetMarginChar( NewValue: longint );
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475 | begin
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476 | if NewValue = FMarginChar then
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477 | exit; // no change
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478 |
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479 | FMarginChar := NewValue;
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480 |
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481 | if FMarginSizeStyle <> msSpecifiedChar then
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482 | // doesn't matter, will be ignored
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483 | exit;
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484 | Change;
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485 | end;
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486 |
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487 | Procedure TRichTextSettings.SetMarginSizeStyle( NewValue: TMarginSizeStyle );
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488 | begin
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489 | if NewValue = FMarginSizeStyle then
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490 | exit; // no change
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491 |
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492 | FMarginSizeStyle := NewValue;
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493 | Change;
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494 | end;
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495 |
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496 | Function FontSame( FontA: TFont; FontB: TFont ): boolean;
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497 | begin
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498 | if ( FontA = nil )
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499 | or ( FontB = nil ) then
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500 | begin
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501 | Result := FontA = FontB;
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502 | exit;
|
---|
503 | end;
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504 |
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505 | Result := ( FontA.FaceName = FontB.FaceName )
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506 | and ( FontA.PointSize = FontB.PointSize )
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507 | and ( FontA.Attributes = FontB.Attributes );
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508 | end;
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509 |
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510 | Procedure TRichTextSettings.AssignFont( Var Font: TFont;
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511 | NewFont: TFont );
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512 | begin
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513 | If NewFont = Nil Then
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514 | NewFont := Screen.DefaultFont;
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515 |
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516 | if FontSame( NewFont, Font ) then
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517 | exit; // no change
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---|
518 |
|
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519 | DereferenceFont( Font );
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520 | Font := NewFont;
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521 | ReferenceFont( Font );
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522 |
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523 | Change;
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524 | End;
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525 |
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526 | Procedure TRichTextSettings.SetHeading1Font( NewFont: TFont );
|
---|
527 | begin
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---|
528 | // ProfileEvent( 'TRichTextSettings.SetHeading1Font' );
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529 | AssignFont( FHeading1Font, NewFont );
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530 |
|
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531 | // if FHeading1FOnt = nil then
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532 | // ProfileEvent( ' Set to nil' );
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533 |
|
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534 | end;
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535 |
|
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536 | Procedure TRichTextSettings.SetHeading2Font( NewFont: TFont );
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537 | begin
|
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538 | AssignFont( FHeading2Font, NewFont );
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539 | End;
|
---|
540 |
|
---|
541 | Procedure TRichTextSettings.SetHeading3Font( NewFont: TFont );
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---|
542 | begin
|
---|
543 | AssignFont( FHeading3Font, NewFont );
|
---|
544 | End;
|
---|
545 |
|
---|
546 | Procedure TRichTextSettings.SetFixedFont( NewFont: TFont );
|
---|
547 | begin
|
---|
548 | AssignFont( FFixedFont, NewFont );
|
---|
549 | end;
|
---|
550 |
|
---|
551 | Procedure TRichTextSettings.SetNormalFont( NewFont: TFont );
|
---|
552 | begin
|
---|
553 | AssignFont( FNormalFont, NewFont );
|
---|
554 | end;
|
---|
555 |
|
---|
556 | Procedure TRichTextSettings.SetMargins( const NewMargins: TRect );
|
---|
557 | begin
|
---|
558 | if NewMargins = FMargins then
|
---|
559 | exit; // no change
|
---|
560 | FMargins := NewMargins;
|
---|
561 | Change;
|
---|
562 | end;
|
---|
563 |
|
---|
564 | function TRichTextSettings.GetMargin_Left: longint;
|
---|
565 | begin
|
---|
566 | Result := FMargins.Left;
|
---|
567 | end;
|
---|
568 |
|
---|
569 | Procedure TRichTextSettings.SetMargin_Left( NewValue: longint );
|
---|
570 | begin
|
---|
571 | Margins.Left := NewValue;
|
---|
572 | end;
|
---|
573 |
|
---|
574 | function TRichTextSettings.GetMargin_Bottom: longint;
|
---|
575 | begin
|
---|
576 | Result := FMargins.Bottom;
|
---|
577 | end;
|
---|
578 |
|
---|
579 | Procedure TRichTextSettings.SetMargin_Bottom( NewValue: longint );
|
---|
580 | begin
|
---|
581 | Margins.Bottom := NewValue;
|
---|
582 | end;
|
---|
583 |
|
---|
584 | function TRichTextSettings.GetMargin_Right: longint;
|
---|
585 | begin
|
---|
586 | Result := FMargins.Right;
|
---|
587 | end;
|
---|
588 |
|
---|
589 | Procedure TRichTextSettings.SetMargin_Right( NewValue: longint );
|
---|
590 | begin
|
---|
591 | Margins.Right := NewValue;
|
---|
592 | end;
|
---|
593 |
|
---|
594 | function TRichTextSettings.GetMargin_Top: longint;
|
---|
595 | begin
|
---|
596 | Result := FMargins.Top;
|
---|
597 | end;
|
---|
598 |
|
---|
599 | Procedure TRichTextSettings.SetMargin_Top( NewValue: longint );
|
---|
600 | begin
|
---|
601 | Margins.Top := NewValue;
|
---|
602 | end;
|
---|
603 |
|
---|
604 | Procedure TRichTextSettings.SetDefaultColor( NewColor: TColor );
|
---|
605 | begin
|
---|
606 | if NewColor = FDefaultColor then
|
---|
607 | exit;
|
---|
608 | FDefaultColor := NewColor;
|
---|
609 | Change;
|
---|
610 | end;
|
---|
611 |
|
---|
612 | Procedure TRichTextSettings.SetDefaultBackgroundColor( NewColor: TColor );
|
---|
613 | begin
|
---|
614 | if NewColor = FDefaultBackgroundColor then
|
---|
615 | exit;
|
---|
616 | FDefaultBackgroundColor := NewColor;
|
---|
617 | Change;
|
---|
618 | end;
|
---|
619 |
|
---|
620 | procedure TRichTextSettings.BeginUpdate;
|
---|
621 | begin
|
---|
622 | inc( FUpdateCount );
|
---|
623 | end;
|
---|
624 |
|
---|
625 | procedure TRichTextSettings.EndUpdate;
|
---|
626 | begin
|
---|
627 | if FUpdateCount = 0 then
|
---|
628 | exit;
|
---|
629 |
|
---|
630 | dec( FUpdateCount );
|
---|
631 | if FUpdateCount = 0 then
|
---|
632 | begin
|
---|
633 | if FChangesPending then
|
---|
634 | begin
|
---|
635 | Change;
|
---|
636 | FChangesPending := false;
|
---|
637 | end;
|
---|
638 | end;
|
---|
639 | end;
|
---|
640 |
|
---|
641 | Initialization
|
---|
642 | RegisterClasses( [ TRichTextSettings ] );
|
---|
643 | End.
|
---|