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https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-05-02 00:23:38 +02:00
813 lines
23 KiB
ObjectPascal
813 lines
23 KiB
ObjectPascal
unit TAHtml;
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{$H+}
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{ If the following DEFINE is enabled then the HTML text can contain font size
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tags.
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NOTE: Since TAChart does not have a general way to know about font metrics
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texts are aligned at the top, i.e. the base line of labels containing
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font size tags will change. ACTIVATING THIS DIRECTIVE IS NOT RECOMMENDED. }
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{.$DEFINE HTML_FONT_SIZE}
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interface
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uses
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Classes, fpcanvas, TADrawUtils;
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type
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THTMLAnalyzer = class
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private
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FSubscript: Integer;
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FSuperscript: Integer;
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FFontStack: TFPList;
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FDrawer: IChartDrawer;
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FSize: TPoint;
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FPos: TPoint;
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FStartPos: TPoint;
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FCurrentFont: TFPCustomFont;
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FSavedFont: TFPCustomFont;
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FFontAngle: Double;
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protected
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procedure ClearFontStack;
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procedure HTMLTagFound(NoCaseTag, ActualTag: String);
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procedure HTMLTextFound_Size(AText: String);
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procedure HTMLTextFound_Out(AText: String);
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procedure Init;
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procedure PopFont;
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procedure PushFont;
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public
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constructor Create(ADrawer: IChartDrawer);
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destructor Destroy; override;
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function TextExtent(const AText: String): TPoint;
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procedure TextOut(AX, AY: Integer; const AText: String);
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end;
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implementation
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uses
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SysUtils, math, contnrs, fpimage, fasthtmlparser, htmlutil,
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TAChartUtils, TAGeometry;
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const
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SUBSUP_DIVISOR = 100;
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SUBSUP_SIZE_MULTIPLIER = 70; //75;
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SUB_OFFSET_MULTIPLIER = 80;
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SUP_OFFSET_MULTIPLIER = -5;
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type
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THtmlEntities = class(TFPStringHashTable)
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public
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procedure Add(const AEntName, AEntNum, AUtf8: String); reintroduce;
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end;
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var
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HtmlEntities: THtmlEntities = nil;
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procedure THtmlEntities.Add(const AEntName, AEntNum, AUtf8: String);
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begin
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inherited Add(AEntName, AUtf8);
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inherited Add(AEntNum, AUtf8);
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end;
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// https://www.w3schools.com/charsets/ref_utf_basic_latin.asp
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procedure PopulateHtmlEntities;
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begin
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if HtmlEntities <> nil then
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exit;
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HtmlEntities := THtmlEntities.Create;
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with HtmlEntities do begin
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// Latin Basic
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Add('quot', '34', '"');
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Add('amp', '38', '&');
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Add('apos', '39', '''');
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Add('lt', '60', '<');
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Add('gt', '61', '>');
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// Latin Supplement
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Add('nbsp', '160', ' ');
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Add('iexcl', '161', '¡');
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Add('cent', '162', '¢');
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Add('pound', '163', '£');
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Add('curren', '164', '¤');
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Add('yen', '165', '¥');
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Add('brvbar', '166', '¦');
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Add('sect', '167', '§');
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Add('uml', '168', '¨');
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Add('copy', '169', '©');
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Add('ordf', '170', 'ª');
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Add('laquo', '171', '«');
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Add('not', '172', '¬');
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Add('reg', '174', '®');
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Add('macr', '175', '¯');
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Add('deg', '176', '°');
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Add('plusmn', '177', '±');
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Add('sup2', '178', '²');
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Add('sup3', '179', '³');
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Add('acute', '180', '´');
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Add('micro', '181', 'µ');
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Add('para', '182', '¶');
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Add('middot', '183', '·');
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Add('cedil', '184', '¸');
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Add('sup1', '185', '¹');
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Add('ordm', '186', 'º');
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Add('raquo', '187', '»');
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Add('frac14', '188', '¼');
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Add('frac12', '189', '½');
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Add('frac34', '190', '¾');
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Add('iquest', '191', '¿');
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Add('Agrave', '192', 'À');
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Add('Aacute', '193', 'Á');
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Add('Acirc', '194', 'Â');
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Add('Atilde', '195', 'Ã');
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Add('Auml', '196', 'Ä');
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Add('Aring', '197', 'Å');
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Add('AElig', '198', 'Æ');
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Add('Ccedil', '199', 'Ç');
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Add('Egrave', '200', 'È');
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Add('Eacute', '201', 'É');
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Add('Ecirc', '202', 'Ê');
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Add('Euml', '203', 'Ë');
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Add('Igrave', '204', 'Ì');
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Add('Iacute', '205', 'Í');
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Add('Icirc', '206', 'Î');
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Add('Iuml', '207', 'Ï');
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Add('ETH', '208', 'Ð');
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Add('Ntilde', '209', 'Ñ');
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Add('Ograve', '210', 'Ò');
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Add('Oacute', '211', 'Ó');
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Add('Ocirc', '212', 'Ô');
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Add('Otilde', '213', 'Õ');
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Add('Ouml', '214', 'Ö');
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Add('times', '215', '×');
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Add('Oslash', '216', 'Ø');
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Add('Ugrave', '217', 'Ù');
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Add('Uacute', '218', 'Ú');
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Add('Ucirc', '219', 'Û');
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Add('Uuml', '220', 'Ü');
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Add('Yacute', '221', 'Ý');
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Add('THORN', '222', 'Þ');
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Add('szlig', '223', 'ß');
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Add('agrave', '224', 'à');
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Add('aacute', '225', 'á');
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Add('acirc', '226', 'â');
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Add('atilde', '227', 'ã');
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Add('auml', '228', 'ä');
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Add('aring', '229', 'å');
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Add('aelig', '230', 'æ');
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Add('ccedil', '231', 'ç');
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Add('egrave', '232', 'è');
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Add('eacute', '233', 'é');
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Add('ecirc', '234', 'ê');
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Add('euml', '235', 'ë');
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Add('igrave', '236', 'ì');
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Add('iacute', '237', 'í');
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Add('icircl', '238', 'î');
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Add('iuml', '239', 'ï');
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Add('eth', '240', 'ð');
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Add('ntilde', '241', 'ñ');
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Add('ograve', '242', 'ò');
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Add('oacute', '243', 'ô');
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Add('ocirc', '244', 'ô');
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Add('otilde', '245', 'õ');
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Add('ouml', '246', 'ö');
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Add('divide', '247', '÷');
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Add('oslash', '248', 'ø');
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Add('ugrave', '249', 'ù');
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Add('uacute', '250', 'ú');
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Add('ucirc', '251', 'û');
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Add('uuml', '252', 'ü');
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Add('yacute', '253', 'ý');
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Add('thorn', '254', 'þ');
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Add('yuml', '255', 'ÿ');
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// Latin Extended A
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Add('Amacr', '256', 'Ā');
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Add('amacr', '257', 'ā');
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Add('Abreve', '258', 'Ă');
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Add('abreve', '259', 'ă');
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Add('Aogon', '260', 'Ą');
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Add('aogon', '261', 'ą');
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Add('Cacute', '262', 'Ć');
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Add('cacute', '263', 'ć');
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Add('Ccirc', '264', 'Ĉ');
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Add('ccirc', '265', 'ĉ');
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Add('Cdot', '266', 'Ċ');
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Add('cdot', '267', 'ċ');
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Add('Ccaron', '268', 'Č');
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Add('ccaron', '269', 'č');
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Add('Dcaron', '270', 'Ď');
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Add('dcaron', '271', 'ď');
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Add('Dstrok', '272', 'Đ');
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Add('dstrok', '273', 'đ');
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Add('Emacr', '274', 'Ē');
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Add('emacr', '275', 'ē');
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Add('Edot', '278', 'Ė');
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Add('edot', '279', 'ė');
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Add('Eogon', '280', 'Ę');
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Add('eogon', '281', 'ę');
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Add('Ecaron', '282', 'Ě');
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Add('ecaron', '283', 'ě');
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Add('Gcirc', '284', 'Ĝ');
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Add('gcirc', '285', 'ĝ');
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Add('Gbreve', '286', 'Ğ');
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Add('gbreve', '287', 'ğ');
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Add('Gdot', '288', 'Ġ');
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Add('gdot', '289', 'ġ');
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Add('Gcedil', '290', 'Ģ');
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Add('gcedil', '291', 'ģ');
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Add('Hcirc', '292', 'Ĥ');
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Add('hcirc', '293', 'ĥ');
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Add('Hstrok', '294', 'Ħ');
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Add('hstrok', '295', 'ħ');
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Add('Itilde', '296', 'Ĩ');
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Add('itilde', '297', 'ĩ');
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Add('Imacr', '298', 'Ī');
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Add('imacr', '299', 'ī');
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Add('Iogon', '302', 'Į');
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Add('iogon', '303', 'į');
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Add('Idot', '304', 'İ');
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Add('inodot', '305', 'ı');
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Add('IJlig', '306', 'IJ');
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Add('ijlig', '307', 'ij');
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Add('Jcirc', '308', 'Ĵ');
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Add('jcirc', '309', 'ĵ');
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Add('Kcedil', '310', 'Ķ');
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Add('kcedil', '311', 'ķ');
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Add('kgreen', '312', 'ĸ');
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Add('Lacute', '313', 'Ĺ');
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Add('lacute', '314', 'ĺ');
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Add('Lcedil', '315', 'Ļ');
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Add('lcedil', '316', 'ļ');
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Add('Lcaron', '317', 'Ľ');
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Add('lcaron', '318', 'ľ');
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Add('Lmidot', '319', 'Ŀ');
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Add('lmidot', '320', 'ŀ');
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Add('Lstrok', '321', 'Ł');
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Add('lstrok', '322', 'ł');
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Add('Nacute', '323', 'Ń');
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Add('nacute', '324', 'ń');
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Add('Ncedil', '325', 'Ņ');
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Add('ncedil', '326', 'ņ');
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Add('Ncaron', '327', 'Ň');
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Add('ncaron', '328', 'ň');
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Add('napos', '329', 'ʼn');
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Add('ENG', '330', 'Ŋ');
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Add('eng', '331', 'ŋ');
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Add('Omacr', '332', 'Ō');
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Add('omacr', '333', 'ō');
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Add('Odblac', '336', 'Ő');
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Add('odblac', '337', 'ő');
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Add('OElig', '338', 'Œ');
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Add('oelig', '339', 'œ');
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Add('Racute', '340', 'Ŕ');
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Add('racute', '341', 'ŕ');
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Add('Rcedil', '342', 'Ŗ');
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Add('rcedil', '343', 'ŗ');
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Add('Rcaron', '344', 'Ř');
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Add('rcaron', '345', 'ř');
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Add('Sacute', '346', 'Ś');
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Add('sacute', '347', 'ś');
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Add('Scirc', '348', 'Ŝ');
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Add('scirc', '349', 'ŝ');
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Add('Scedil', '350', 'Ş');
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Add('scedil', '351', 'ş');
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Add('Scaron', '352', 'Š');
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Add('scaron', '353', 'š');
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Add('Tcedil', '354', 'Ţ');
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Add('tcedil', '355', 'ţ');
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Add('Tcaron', '356', 'Ť');
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Add('tcaron', '357', 'ť');
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Add('Tstrok', '358', 'Ŧ');
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Add('tstrok', '359', 'ŧ');
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Add('Utilde', '360', 'Ũ');
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Add('utilde', '361', 'ũ');
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Add('Umacr', '362', 'Ū');
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Add('umacr', '363', 'ū');
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Add('Ubreve', '364', 'Ŭ');
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Add('ubreve', '365', 'ŭ');
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Add('Uring', '366', 'Ů');
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Add('uring', '367', 'ů');
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Add('Udblac', '368', 'Ű');
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Add('udblac', '369', 'ű');
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Add('Uogon', '370', 'Ų');
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Add('uogon', '371', 'ų');
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Add('Wcirc', '372', 'Ŵ');
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Add('wcirc', '373', 'ŵ');
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Add('Ycirc', '374', 'Ŷ');
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Add('ycirc', '375', 'ŷ');
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Add('Yuml', '376', 'Ÿ');
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Add('Zacute', '377', 'Ź');
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Add('zacute', '378', 'ź');
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Add('Zdot', '379', 'Ż');
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Add('zdot', '380', 'ż');
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Add('Zcaron', '381', 'Ž');
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Add('zcaron', '382', 'ž');
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// Latin Extended B
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Add('fnof', '402', 'ƒ');
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Add('imped', '437', 'Ƶ');
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Add('gacute', '501', 'ǵ');
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Add('jmath', '567', 'ȷ');
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// Modified letters
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Add('circ', '710', 'ˆ');
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Add('tilde', '732', '˜');
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// Greek and coptic
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Add('Alpha', '913', 'Α');
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Add('Beta', '914', 'Β');
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Add('Gamma', '915', 'Γ');
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Add('Delta', '916', 'Δ');
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Add('Epsilon', '917', 'Ε');
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Add('Zeta', '918', 'Ζ');
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Add('Eta', '919', 'Η');
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Add('Theta', '920', 'Θ');
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Add('Iota', '921', 'Ι');
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Add('Kappa', '922', 'Κ');
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Add('Lambda', '923', 'Λ');
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Add('Mu', '924', 'Μ');
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Add('Nu', '925', 'Ν');
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Add('Xi', '926', 'Ξ');
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Add('Omicron', '927', 'Ο');
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Add('Pi', '928', 'Π');
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Add('Rho', '929', 'Ρ');
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Add('Sigma', '931', 'Σ');
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Add('Tau', '932', 'Τ');
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Add('Upsilon', '933', 'Υ');
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Add('Phi', '934', 'Φ');
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Add('Chi', '935', 'Χ');
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Add('Psi', '936', 'Ψ');
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Add('Omega', '937', 'Ω');
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Add('alpha', '945', 'α');
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Add('beta', '946', 'β');
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Add('gamma', '947', 'γ');
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Add('delta', '948', 'δ');
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Add('epsilon', '949', 'ε');
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Add('zeta', '950', 'ζ');
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Add('eta', '951', 'η');
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Add('theta', '952', 'θ');
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Add('iota', '953', 'ι');
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Add('kappa', '954', 'κ');
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Add('lambda', '955', 'λ');
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Add('mu', '956', 'μ');
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Add('nu', '957', 'ν');
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Add('xi', '958', 'ξ');
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Add('omicron', '959', 'ο');
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Add('pi', '960', 'π');
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Add('rho', '961', 'ρ');
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Add('sigmaf', '962', 'ς');
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Add('sigma', '963', 'σ');
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Add('tau', '964', 'τ');
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Add('upsilon', '965', 'υ');
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Add('phi', '966', 'φ');
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Add('chi', '967', 'χ');
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Add('psi', '968', 'ψ');
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Add('omega', '969', 'ω');
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Add('thetasym','977', 'ϑ');
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Add('upsih', '978', 'ϒ');
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Add('straightphi', '981', 'ϕ');
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Add('piv', '982', 'ϖ'); // ??? should be vertical pi
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Add('Gammad', '988', 'Ϝ');
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Add('gammad', '987', 'ϝ');
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Add('varkappa','1008', 'ϰ');
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Add('varrho', '1009', 'ϱ');
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Add('straightepsilon', '1013', 'ϵ');
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Add('backepsilon', '1014', '϶');
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// Currency
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Add('euro', '8364', '€');
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// Arrows
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Add('larr', '8592', '←');
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Add('uarr', '8593', '↑');
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Add('rarr', '8594', '→');
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Add('darr', '8595', '↓');
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Add('harr', '8596', '↔');
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Add('crarr', '8629', '↵');
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Add('lArr', '8656', '⇐');
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Add('uArr', '8657', '⇑');
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Add('rArr', '8658', '⇒');
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Add('dArr', '8659', '⇓');
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Add('hArr', '8860', '⇔');
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// Math operators
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Add('forall', '8704', '∀');
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Add('part', '8706', '∂');
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Add('exist', '8707', '∃');
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Add('empty', '8709', '∅');
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Add('nabla', '8711', '∇');
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Add('isin', '8712', '∈');
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Add('notin', '8713', '∉');
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Add('ni', '8715', '∋');
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Add('prod', '8719', '∏');
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Add('sum', '8721', '∑');
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Add('minus', '8722', '−');
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Add('lowast', '8728', '∗');
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Add('radic', '8730', '√');
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Add('prop', '8733', '∝');
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Add('infin', '8734', '∞');
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Add('ang', '8736', '∠');
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Add('and', '8743', '∧');
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Add('or', '8744', '∨');
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Add('cap', '8745', '∩');
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Add('cup', '8746', '∪');
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Add('int', '8747', '∫');
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Add('there4', '8756', '∴');
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Add('sim', '8764', '∼');
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Add('cong', '8773', '≅');
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Add('asymp', '9776', '≅');
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Add('ne', '8800', '≠');
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Add('equiv', '8801', '≡');
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Add('le', '8804', '≤');
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Add('ge', '8805', '≥');
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Add('sub', '8834', '⊂');
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Add('sup', '8835', '⊃');
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Add('nsub', '8836', '⊄');
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Add('sube', '8838', '⊆');
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Add('supe', '8839', '⊇');
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Add('oplus', '8853', '⊕');
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Add('otimes', '8855', '⊗');
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Add('perp', '8859', '⊥');
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Add('sdot', '8901', '⋅');
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// Geometric shapes
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Add('loz', '9674', '◊');
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// Misc symbols
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Add('spades', '9824', '♠');
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Add('clubs', '9827', '♣');
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Add('hearts', '9829', '♥');
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Add('diams', '9830', '♦');
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end;
|
||
end;
|
||
|
||
function HTMLEntityToUTF8(s: String): String;
|
||
var
|
||
n: Integer;
|
||
begin
|
||
if s = '' then
|
||
exit('');
|
||
|
||
if (Length(s) > 1) and (s[1] = '#') then begin
|
||
Delete(s, 1, 1);
|
||
if (s[1] = 'x') then begin
|
||
s[1] := '$';
|
||
n := StrToInt(s);
|
||
s := IntToStr(n);
|
||
end;
|
||
end;
|
||
|
||
Result := HTMLEntities[s];
|
||
end;
|
||
|
||
function ReplaceHTMLEntities(const AText: String): String;
|
||
var
|
||
i: Integer;
|
||
s: String;
|
||
begin
|
||
Result := '';
|
||
i := 1;
|
||
while (i <= Length(AText)) do
|
||
begin
|
||
case AText[i] of
|
||
'&': begin
|
||
s := '';
|
||
inc(i);
|
||
while (i <= Length(AText)) and (AText[i] <> ';') do begin
|
||
s := s + AText[i];
|
||
inc(i);
|
||
end;
|
||
Result := Result + HTMLEntityToUTF8(s);
|
||
end;
|
||
else Result := Result + AText[i];
|
||
end;
|
||
inc(i);
|
||
end;
|
||
end;
|
||
|
||
function HTMLToFPColor(const AText: String): TFPColor;
|
||
var
|
||
i: Integer;
|
||
len: Integer;
|
||
begin
|
||
Result := colBlack;
|
||
// AText is already upper-cased by the calling routine.
|
||
case AText of
|
||
'AQUA' : Result := colAqua;
|
||
'BLACK' : Result := colBlack;
|
||
'BLUE' : Result := colBlue;
|
||
'CYAN' : Result := colCyan;
|
||
'FUCHSIA': Result := colFuchsia;
|
||
'GRAY' : Result := colGray;
|
||
'GREY' : Result := colGray;
|
||
'GREEN' : Result := colGreen;
|
||
'LIME' : Result := colLime;
|
||
'MAGENTA': Result := colMagenta;
|
||
'MAROON' : Result := colMaroon;
|
||
'NAVY' : Result := colNavy;
|
||
'OLIVE' : Result := colOlive;
|
||
'PURPLE' : Result := colPurple;
|
||
'RED' : Result := colRed;
|
||
'SILVER' : Result := colSilver;
|
||
'TEAL' : Result := colTeal;
|
||
'WHITE' : Result := colWhite;
|
||
'YELLOW' : Result := colYellow;
|
||
else if (pos('#', AText) = 1) then begin
|
||
len := Length(AText);
|
||
if not (len in [7, 4]) then
|
||
exit;
|
||
for i:=2 to len do
|
||
if not (AText[i] in ['0'..'9', 'A'..'F']) then
|
||
exit;
|
||
if len = 7 then begin
|
||
Result.Red := StrToInt('$' + copy(AText, 2, 2)) shl 8;
|
||
Result.Green := StrToInt('$' + copy(AText, 4, 2)) shl 8;
|
||
Result.Blue := StrToInt('$' + copy(AText, 6, 2)) shl 8;
|
||
end else
|
||
if len = 4 then begin
|
||
Result.Red := StrToInt('$' + AText[2] + AText[2]) shl 8;
|
||
Result.Green := StrToInt('$' + AText[3] + AText[3]) shl 8;
|
||
Result.Blue := StrToInt('$' + AText[4] + AText[4]) shl 8;
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
{$IFDEF HTML_FONT_SIZE}
|
||
function HTMLToFontSize(AText: String): Integer;
|
||
begin
|
||
case AText of
|
||
'X-SMALL', '1' : Result := 7;
|
||
'SMALL', '2' : Result := 10;
|
||
'MEDIUM', '3' : Result := 12;
|
||
'LARGE', '4' : Result := 14;
|
||
'X-LARGE', '5' : Result := 18;
|
||
'XX-LARGE', '6' : Result := 24;
|
||
else
|
||
if Pos('PT', AText) = Length(AText)-1 then
|
||
Result := StrToInt(Copy(AText, 1, Length(AText) - 2))
|
||
else
|
||
if Pos('PX', AText) = Length(AText)-1 then
|
||
begin
|
||
Result := StrToInt(Copy(AText, 1, Length(AText) - 2));
|
||
Result := Result * 72 div 96; // Assuming a 96 ppi screen here!
|
||
end else
|
||
Result := 9;
|
||
end;
|
||
end;
|
||
{$ENDIF}
|
||
|
||
|
||
{ THTMLAnalyzer }
|
||
|
||
constructor THTMLAnalyzer.Create(ADrawer: IChartDrawer);
|
||
begin
|
||
FDrawer := ADrawer;
|
||
PopulateHTMLEntities;
|
||
FSavedFont := TFPCustomFont.Create;
|
||
FFontStack := TFPList.Create;
|
||
end;
|
||
|
||
destructor THTMLAnalyzer.Destroy;
|
||
var
|
||
j: Integer;
|
||
begin
|
||
for j:=0 to FFontStack.Count-1 do TFPCustomFont(FFontStack[j]).Free;
|
||
FFontStack.Free;
|
||
FCurrentFont.Free;
|
||
FSavedFont.Free;
|
||
inherited;
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.ClearFontStack;
|
||
var
|
||
j: Integer;
|
||
begin
|
||
for j:=0 to FFontStack.Count-1 do TFPCustomFont(FFontStack[j]).Free;
|
||
FFontStack.Clear;
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.HTMLTagFound(NoCaseTag, ActualTag: String);
|
||
var
|
||
val: String;
|
||
begin
|
||
Unused(ActualTag);
|
||
|
||
if NoCaseTag[2] = '/' then
|
||
case NoCaseTag of
|
||
'</B>',
|
||
'</STRONG>',
|
||
'</I>',
|
||
'</EM>',
|
||
'</U>',
|
||
'</S>',
|
||
'</FONT>':
|
||
PopFont;
|
||
'</SUB>':
|
||
dec(FSubscript);
|
||
'</SUP>':
|
||
dec(FSuperscript);
|
||
end
|
||
else begin
|
||
case NoCaseTag of
|
||
'<B>', '<STRONG>':
|
||
begin
|
||
PushFont;
|
||
FCurrentFont.Bold := true;
|
||
end;
|
||
'<I>', '<EM>':
|
||
begin
|
||
PushFont;
|
||
FCurrentFont.Italic := true;
|
||
end;
|
||
'<U>':
|
||
begin
|
||
PushFont;
|
||
FCurrentFont.Underline := true;
|
||
end;
|
||
'<S>':
|
||
begin
|
||
PushFont;
|
||
FCurrentFont.StrikeThrough := true;
|
||
end;
|
||
'<SUB>':
|
||
begin // Don't push the font to the stack
|
||
inc(FSubscript);
|
||
end;
|
||
'<SUP>':
|
||
begin // Don't push the font to the stack
|
||
inc(FSuperscript);
|
||
end;
|
||
else
|
||
if (pos('<FONT ', NoCaseTag) = 1) or (NoCaseTag = '<FONT>') then begin
|
||
PushFont;
|
||
val := GetVal(NoCaseTag, 'NAME');
|
||
if val <> '' then
|
||
FCurrentFont.Name := val;
|
||
{$IFDEF HTML_FONT_SIZE}
|
||
val := GetVal(NoCaseTag, 'SIZE');
|
||
if val <> '' then
|
||
FCurrentFont.Size := HTMLToFontSize(val);
|
||
{$ENDIF}
|
||
val := GetVal(NoCaseTag, 'COLOR');
|
||
if val <> '' then
|
||
FCurrentFont.FPColor := HTMLToFPColor(val);
|
||
end else
|
||
exit;
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.HTMLTextFound_Out(AText: String);
|
||
var
|
||
oldFontSize: Integer;
|
||
offs: Integer;
|
||
s: string;
|
||
P: TPoint;
|
||
w, h: Integer;
|
||
begin
|
||
s := ReplaceHTMLEntities(AText);
|
||
|
||
if (FSubScript > 0) or (FSuperScript > 0) then
|
||
begin
|
||
oldFontSize := FCurrentFont.Size;
|
||
FCurrentFont.Size := (FCurrentFont.Size * SUBSUP_SIZE_MULTIPLIER) div SUBSUP_DIVISOR;
|
||
FDrawer.SetFont(FCurrentFont);
|
||
h := FDrawer.TextExtent('Tg', tfNormal).Y; // tfNormal is correct
|
||
w := FDrawer.TextExtent(s, tfNormal).X;
|
||
if FSubScript > 0 then
|
||
offs := (h * SUB_OFFSET_MULTIPLIER) div SUBSUP_DIVISOR
|
||
else
|
||
offs := (h * SUP_OFFSET_MULTIPLIER) div SUBSUP_DIVISOR; // this is negative
|
||
P := Point(FPos.X, FPos.Y+offs) - FStartPos;
|
||
p := RotatePoint(P, -FFontAngle) + FStartPos;
|
||
FDrawer.TextOut.TextFormat(tfNormal).Pos(P).Text(s).Done;
|
||
FCurrentFont.Size := oldFontSize;
|
||
end else
|
||
begin
|
||
FDrawer.SetFont(FCurrentFont);
|
||
w := FDrawer.TextExtent(s, tfNormal).X; // tfNormal is correct
|
||
p := RotatePoint(FPos - FStartPos, -FFontAngle) + FStartPos;
|
||
FDrawer.TextOut.TextFormat(tfNormal).Pos(P).Text(s).Done;
|
||
end;
|
||
inc(FPos.X, w);
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.HTMLTextFound_Size(AText: String);
|
||
var
|
||
ext: TPoint;
|
||
oldFontSize: Integer;
|
||
s: String;
|
||
offs: Integer;
|
||
begin
|
||
s := ReplaceHTMLEntities(AText);
|
||
if (FSubScript > 0) or (FSuperscript > 0) then
|
||
begin
|
||
oldFontSize := FCurrentFont.Size;
|
||
FCurrentFont.Size := FCurrentFont.Size * SUBSUP_SIZE_MULTIPLIER div SUBSUP_DIVISOR;
|
||
FDrawer.SetFont(FCurrentFont);
|
||
ext := FDrawer.TextExtent(s, tfNormal); // tfNormal is correct
|
||
FCurrentFont.Size := oldFontSize;
|
||
if FSubScript > 0 then
|
||
begin
|
||
offs := (ext.y * SUB_OFFSET_MULTIPLIER) div SUBSUP_DIVISOR;
|
||
if ext.y + offs > FSize.Y then ext.Y := ext.y + offs;
|
||
end else
|
||
begin
|
||
offs := (ext.y * SUP_OFFSET_MULTIPLIER) div SUBSUP_DIVISOR; // this is negative
|
||
if ext.y - offs > FSize.Y then ext.Y := ext.y - offs; // offs is negative
|
||
end;
|
||
end else
|
||
begin
|
||
FDrawer.SetFont(FCurrentFont);
|
||
ext := FDrawer.TextExtent(s, tfNormal); // tfNormal is correct
|
||
end;
|
||
FSize.X := FSize.X + ext.X;
|
||
FSize.Y := Max(FSize.Y, ext.Y);
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.Init;
|
||
begin
|
||
FFontAngle := FDrawer.GetFontAngle;
|
||
|
||
FSavedFont.Name := FDrawer.GetFontName;
|
||
FSavedFont.Size := FDrawer.GetFontSize;
|
||
FSavedFont.FPColor := FDrawer.GetFontColor;
|
||
FSavedFont.Bold := cfsBold in FDrawer.GetFontStyle;
|
||
FSavedFont.Italic := cfsItalic in FDrawer.GetFontStyle;
|
||
FSavedFont.Underline := cfsUnderline in FDrawer.GetFontStyle;
|
||
FSavedFont.StrikeThrough := cfsStrikeOut in FDrawer.GetFontStyle;
|
||
FSavedFont.Orientation := RadToOrient(FFontAngle);
|
||
|
||
FCurrentFont := FSavedFont.CopyFont;
|
||
FCurrentFont.Orientation := FSavedFont.Orientation;
|
||
ClearFontStack;
|
||
|
||
FSubscript := 0;
|
||
FSuperscript := 0;
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.PopFont;
|
||
begin
|
||
FCurrentFont.Free;
|
||
FCurrentFont := TFPCustomFont(FFontStack[FFontStack.Count-1]);
|
||
FFontStack.Delete(FFontStack.Count-1);
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.PushFont;
|
||
var
|
||
fnt: TFPCustomFont;
|
||
begin
|
||
fnt := FCurrentFont.CopyFont;
|
||
fnt.Orientation := FCurrentFont.Orientation;
|
||
FFontStack.Add(fnt);
|
||
end;
|
||
|
||
function THTMLAnalyzer.TextExtent(const AText: String): TPoint;
|
||
var
|
||
parser: THTMLParser;
|
||
begin
|
||
Init;
|
||
FSize := Point(0, 0);
|
||
parser := THTMLParser.Create('<p>' + AText + '</p>');
|
||
try
|
||
parser.OnFoundTag := @HTMLTagFound;
|
||
parser.OnFoundText := @HTMLTextFound_Size;
|
||
parser.Exec;
|
||
Result := FSize;
|
||
finally
|
||
parser.Free;
|
||
FDrawer.SetFont(FSavedFont);
|
||
end;
|
||
end;
|
||
|
||
procedure THTMLAnalyzer.TextOut(AX, AY: Integer; const AText: String);
|
||
var
|
||
parser: THTMLParser;
|
||
begin
|
||
Init;
|
||
FPos := Point(AX, AY);
|
||
FStartPos := FPos;
|
||
parser := THTMLParser.Create('<p>' + AText + '</p>');
|
||
try
|
||
parser.OnFoundTag := @HTMLTagFound;
|
||
parser.OnFoundText := @HTMLTextFound_Out;
|
||
parser.Exec;
|
||
finally
|
||
parser.Free;
|
||
FDrawer.SetFont(FSavedFont);
|
||
end;
|
||
end;
|
||
|
||
|
||
initialization
|
||
|
||
finalization
|
||
HTMLEntities.Free;
|
||
|
||
end.
|
||
|