gccv/text.h

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// -*- C++ -*-

/*
 * Gnome Chemistry Utils
 * gccv/text.h
 *
 * Copyright (C) 2008-2010 Jean Bréfort <jean.brefort@normalesup.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */

#ifndef GCCV_TEXT_H
#define GCCV_TEXT_H

#include "rectangle.h"
#include "structs.h"
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <pango/pango.h>
#include <list>
#include <string>

namespace gccv {

#define GCCV_TEXT_PROP(type,member) \
public: \
        void Set##member (type val) {   \
                m_##member = val;       \
                SetPosition (m_x, m_y); \
        }       \
        type Get##member (void) const {return m_##member;}      \
private:        \
        type m_##member;

// These are private classes
class TextPrivate;
class TextLine;
class TextRun;
class TextTag;
class TextTagList;

class Text: public Rectangle
{
friend class TextPrivate;
public:
        Text (Canvas *canvas, double x, double y);
        Text (Group *parent, double x, double y, ItemClient *client = NULL);
        virtual ~Text ();

        void SetPosition (double x, double y);
        void SetText (char const *text);
        void SetText (std::string const &text);
        void SetFontDescription (PangoFontDescription *desc);
        void SetColor (GOColor color);
        void SetEditing (bool editing);

        void GetBounds (Rect *ink, Rect *logical);
        char const *GetText ();

        void InsertTextTag (TextTag *tag, bool rebuild_attributes = true);
        void DeleteTextTag (TextTag *tag, bool rebuild_attributes = true);
        std::list <TextTag *> const *GetTags () {return &m_Tags;}

        void SetCurTagList (TextTagList *l);

        void ApplyTagsToSelection (TextTagList const *l);

        void ReplaceText (std::string &str, int pos, unsigned length);
        unsigned GetCursorPosition () {return m_CurPos;}
        void GetSelectionBounds (unsigned &start, unsigned &end);
        void SetSelectionBounds (unsigned start, unsigned end);
        unsigned GetIndexAt (double x, double y);
        bool GetPositionAtIndex (unsigned index, Rect &rect);

        // virtual methods
        void Draw (cairo_t *cr, bool is_vector) const;
        void Move (double x, double y);

        // events related methods
        bool OnKeyPressed (GdkEventKey *event);
        bool OnKeyReleased (GdkEventKey *event);
        void OnButtonPressed (double x, double y);
        void OnDrag (double x, double y);

        // static methods
        static PangoContext *GetContext ();

        unsigned GetDefaultFontSize () { return (m_FontDesc)? (double) pango_font_description_get_size (m_FontDesc) / PANGO_SCALE: 0; }
        void RebuildAttributes ();
        void SetInterline (double interline, bool emit_changed = false);
        void SetJustification (GtkJustification justification, bool emit_changed = false);

private:
        double m_x, m_y;
        unsigned long m_BlinkSignal;
        bool m_CursorVisible;
        unsigned m_CurPos, m_StartSel;
        std::list <TextRun *> m_Runs;
        std::list <TextTag *> m_Tags;
        std::string m_Text;
        GtkIMContext *m_ImContext;
        PangoFontDescription *m_FontDesc;
        TextTagList *m_CurTags;
        TextLine *m_Lines;
        unsigned m_LinesNumber;
        GOColor m_Color;

GCCV_TEXT_PROP (double, Padding)
GCCV_TEXT_PROP (Anchor, Anchor)
GCCV_TEXT_PROP (double, LineOffset)
GCU_RO_PROP (GtkJustification, Justification)
GCU_RO_PROP (double, Interline)
GCU_RO_PROP (double, Width)
GCU_RO_PROP (double, Height)
GCU_RO_PROP (double, Ascent)
GCU_RO_PROP (double, Y)
};

}   //  namespace gccv

#endif  //      GCCV_TEXT_H