font.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef ULTIMA8_GFX_FONTS_FONT_H
#define ULTIMA8_GFX_FONTS_FONT_H

#include "ultima/shared/std/containers.h"
#include "ultima/shared/std/string.h"
#include "ultima/ultima8/misc/rect.h"
#include "ultima/ultima8/misc/encoding.h"

namespace Ultima {
namespace Ultima8 {

class RenderedText;

struct PositionedText {
    Std::string _text;
    Rect _dims;
    Std::string::size_type _cursor;
};

class Font {
public:
    Font();
    virtual ~Font();

    enum TextAlign {
        TEXT_LEFT,
        TEXT_CENTER,
        TEXT_RIGHT
    };

    virtual int getHeight() = 0;

    virtual int getBaseline() = 0;

    virtual int getBaselineSkip() = 0;

    virtual void getStringSize(const Std::string &text,
        int32 &width, int32 &height) = 0;

    virtual RenderedText *renderText(const Std::string &text,
        unsigned int &remaining, int32 width = 0, int32 height = 0,
        TextAlign align = TEXT_LEFT, bool u8specials = false,
        bool pagebreaks = false,
        Std::string::size_type cursor = Std::string::npos) = 0;

    virtual void getTextSize(const Std::string &text,
        int32 &resultwidth, int32 &resultheight, unsigned int &remaining,
        int32 width = 0, int32 height = 0, TextAlign align = TEXT_LEFT,
        bool u8specials = false, bool pagebreaks = false);

    void setHighRes(bool hr) {
        _highRes = hr;
    }
    bool isHighRes() const {
        return _highRes;
    }

protected:
    bool _highRes;

    struct Traits {
        static bool isSpace(Std::string::const_iterator &i, bool u8specials) {
            char c = *i;
            return (c == ' ' || c == '\t' || c == '\n' || c == '\r' ||
                    (u8specials && (c == '%' || c == '~' || c == '*' || c == '^')));
        }
        static bool isTab(Std::string::const_iterator &i, bool u8specials) {
            char c = *i;
            return (c == '\t' ||
                    (u8specials && (c == '\t' || c == '%')));
        }
        static bool isBreak(Std::string::const_iterator &i, bool u8specials) {
            char c = *i;
            return (c == '\n' ||
                    (u8specials && (c == '\n' || c == '~' || c == '*')));
        }
        static bool isPageBreak(Std::string::const_iterator &i, bool u8specials) {
            char c = *i;
            return (u8specials && c == '*');
        }
        static bool canBreakAfter(Std::string::const_iterator &i);
        static void advance(Std::string::const_iterator &i) {
            ++i;
        }
        static Std::string::size_type length(const Std::string &t) {
            return t.size();
        }
        static uint32 unicode(Std::string::const_iterator &i) {
            return encoding[static_cast<uint8>(*i++)];
        }
    };
    struct SJISTraits : public Traits {
        static bool canBreakAfter(Std::string::const_iterator &i);
        static void advance(Std::string::const_iterator &i) {
            // FIXME: this can advance past the end of a malformed string
            uint8 c = *i;
            i++;
            if (c >= 0x80) i++;
        }
        static Std::string::size_type length(const Std::string &t) {
            Std::string::size_type l = 0;
            Std::string::const_iterator iter = t.begin();
            while (iter != t.end()) {
                advance(iter);
                l++;
            }
            return l;
        }
        static uint32 unicode(Std::string::const_iterator &i) {
            uint16 s = static_cast<uint8>(*i);
            i++;
            if (s >= 0x80) {
                uint16 t = static_cast<uint8>(*i++);
                s |= (t << 8);
            }
            return shiftjis_to_unicode(s);
        }
    };
};

template<class T>
Std::list<PositionedText> typesetText(Font *font,
    const Std::string &text, unsigned int &remaining,
    int32 width, int32 height, Font::TextAlign align,
    bool u8specials, bool pagebreaks,
    int32 &resultwidth, int32 &resultheight,
    Std::string::size_type cursor = Std::string::npos);

} // End of namespace Ultima8
} // End of namespace Ultima

#endif