text-tag.h

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00001 // -*- C++ -*-
00002 
00003 /* 
00004  * Gnome Chemistry Utils
00005  * gccv/text-tag.h 
00006  *
00007  * Copyright (C) 2008 Jean Bréfort <jean.brefort@normalesup.org>
00008  *
00009  * This program is free software; you can redistribute it and/or 
00010  * modify it under the terms of the GNU General Public License as 
00011  * published by the Free Software Foundation; either version 2 of the
00012  * License, or (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
00022  * USA
00023  */
00024 
00025 #ifndef GCCV_TEXT_TAG_H
00026 #define GCCV_TEXT_TAG_H
00027 
00028 #include <gcu/macros.h>
00029 #include <pango/pango.h>
00030 #include <string>
00031 
00033 namespace gccv {
00034 
00035 // Text attributes support
00036 typedef enum
00037 {
00038         Invalid,
00039         Family,
00040         Size,
00041         Weight,
00042         Subscript,
00043         Superscript,
00044         Max
00045 } Tag;
00046 
00047 class TextTag
00048 {
00049 public:
00050         TextTag (Tag tag);
00051         virtual ~TextTag ();
00052 
00053         virtual void Filter (PangoAttrList *l, unsigned start, unsigned end) = 0;
00054 private:
00055 
00056 GCU_RO_PROP (Tag, Tag)
00057 GCU_PROP (unsigned, StartIndex)
00058 GCU_PROP (unsigned, EndIndex)
00059 };
00060 
00061 class FamilyTextTag: public TextTag
00062 {
00063 public:
00064         FamilyTextTag (char const *family);
00065         virtual ~FamilyTextTag ();
00066 
00067         virtual void Filter (PangoAttrList *l, unsigned start, unsigned end);
00068 
00069 private:
00070         std::string m_Family;
00071 };
00072 
00073 class SizeTextTag: public TextTag
00074 {
00075 public:
00076         SizeTextTag (double size);
00077         virtual ~SizeTextTag ();
00078 
00079         virtual void Filter (PangoAttrList *l, unsigned start, unsigned end);
00080 
00081 private:
00082         double m_Size;
00083 };
00084 
00085 class SubscriptTextTag: public TextTag
00086 {
00087 public:
00088         SubscriptTextTag ();
00089         virtual ~SubscriptTextTag ();
00090 
00091         virtual void Filter (PangoAttrList *l, unsigned start, unsigned end);
00092 };
00093 
00094 }   //  namespace gccv
00095 
00096 #endif  //      GCCV_TEXT_TAG_H

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