/*
    font.cpp
    Copyright (C) 2007 Acekard, www.acekard.com
    Copyright (C) 2007-2009 somebody
    Copyright (C) 2009 yellow wood goblin

    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/>.
*/

#include <nds.h>
#include <string.h>
#include "font.h"
#include "files.h"
#include "dbgtool.h"
#include "systemfilenames.h"


cFont::cFont()
{
}

cFont::~cFont()
{
}

u32 cFont::getStringScreenWidth( const char * str, size_t len )
{
    if( NULL == str || 0 == len )
        return 0;

    size_t strLen = strlen( str );
    if( len > strLen )
        len = strLen;

    const char * endstr = str + len;
    u32 width = 0;
    const char * p = str;
    while( *p != 0 && p < endstr ) {
      u32 ww,add;
      Info(p,&ww,&add);
      width+=ww;
      p+=add;
    }
    return width;
}

std::string cFont::breakLine( const std::string & text, u32 maxLineWidth )
{
    if( 0 == maxLineWidth )
        return text;

    std::string ret;

    // 找空格
    // 找到之后，和上次空格相减，传入 计算width 函数
    // 如果tempwdith超过 maxwidth，把上次的空格换成 \n
    // tempwidth 清零，继续


    const char * p = text.c_str();
    bool hasSpace = false;
    u32 tempWidth = 0;

    while( *p != 0 )
    {
        u32 ww,add;
        Info(p,&ww,&add);

        if( ' ' == *p ) hasSpace=true;
        tempWidth+=ww;
        if( tempWidth > maxLineWidth )
        {
            if( hasSpace )
            {
                u32 lastSpacePos = ret.find_last_of( ' ' );
                ret[lastSpacePos] = '\n';
                tempWidth = getStringScreenWidth(
                    text.c_str() + lastSpacePos, (size_t)(p - text.c_str()) - lastSpacePos );
                hasSpace = false;
            } else {
                ret.push_back( '\n' );
                tempWidth = 0;
            }
        }
        for(u32 ii=0;ii<add;ii++) ret.push_back( *p++ );
    }
    if(ret[ret.length()-1]!='\n') ret.push_back('\n');

    return ret;
}

u32 cFont::FontRAM(void)
{
  return 0;
}