ui_font.cpp

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/*
Copyright (C) 2002-2020 UFO: Alien Invasion.

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 2
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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "ui_main.h"
#include "ui_internal.h"
#include "ui_font.h"
#include "ui_parse.h"

#include "../cl_shared.h"
#include "../../shared/parse.h"
#include "../renderer/r_font.h"

#define MAX_FONTS 16
static int numFonts = 0;
static uiFont_t fonts[MAX_FONTS];

static const value_t fontValues[] = {
    {"font", V_TRANSLATION_STRING, offsetof(uiFont_t, path), 0},
    {"size", V_INT, offsetof(uiFont_t, size), MEMBER_SIZEOF(uiFont_t, size)},
    {"style", V_HUNK_STRING, offsetof(uiFont_t, style), 0},

    {nullptr, V_NULL, 0, 0}
};

static void UI_RegisterFont (const uiFont_t* font)
{
    const char* path = _(font->path);

    if (!path)
        Com_Error(ERR_FATAL, "...font without path (font %s)", font->name);

    if (FS_CheckFile("%s", path) == -1)
        Com_Error(ERR_FATAL, "...font file %s does not exist (font %s)", path, font->name);

    R_FontRegister(font->name, font->size, path, font->style);
}

bool UI_ParseFont (const char* name, const char** text)
{
    const char* errhead = "UI_ParseFont: unexpected end of file (font";

    /* search for font with same name */
    if (UI_GetFontByID(name)) {
        Com_Printf("UI_ParseFont: font \"%s\" with same name found, second ignored\n", name);
        return false;
    }

    if (numFonts >= MAX_FONTS) {
        Com_Printf("UI_ParseFont: Max fonts reached\n");
        return false;
    }

    /* initialize the UI */
    uiFont_t* font = &fonts[numFonts];
    OBJZERO(*font);

    font->name = Mem_PoolStrDup(name, ui_sysPool, 0);

    Com_DPrintf(DEBUG_CLIENT, "...found font %s (%i)\n", font->name, numFonts);

    /* get it's body */
    const char* token = Com_Parse(text);

    if (!*text || *token != '{') {
        Com_Printf("UI_ParseFont: font \"%s\" without body ignored\n", name);
        return false;
    }

    numFonts++;

    do {
        /* get the name type */
        token = Com_EParse(text, errhead, name);
        if (!*text)
            return false;
        if (*token == '}')
            break;

        const value_t* v;
        for (v = fontValues; v->string; v++)
            if (Q_streq(token, v->string)) {
                /* found a definition */
                token = Com_EParse(text, errhead, name);
                if (!*text)
                    return false;

                switch (v->type) {
                case V_TRANSLATION_STRING:
                    /* Translation strings begin with _, skip that and process like regular strings */
                    token++;
                    /* fall through */
                case V_HUNK_STRING:
                    Mem_PoolStrDupTo(token, &Com_GetValue<char*>(font, v), ui_sysPool, 0);
                    break;
                default:
                    Com_EParseValue(font, token, v->type, v->ofs, v->size);
                    break;
                }
                break;
            }

        if (!v->string)
            Com_Printf("UI_ParseFont: unknown token \"%s\" ignored (font %s)\n", token, name);
    } while (*text);

    UI_RegisterFont(font);
    return true;
}

const char* UI_GetFontFromNode (const uiNode_t* const node)
{
    if (node && node->font) {
        return UI_GetReferenceString(node, node->font);
    }
    return "f_small";
}


const uiFont_t* UI_GetFontByID (const char* name)
{
    for (int i = 0; i < numFonts; i++)
        if (Q_streq(fonts[i].name, name))
            return &fonts[i];

    return nullptr;
}

int UI_FontGetHeight (const char* fontID)
{
    font_t* font = R_GetFont(fontID);
    if (font != nullptr)
        return font->height;
    return -1;
}

void UI_InitFonts (void)
{
    Com_Printf("...registering %i fonts\n", numFonts);
    for (int i = 0; i < numFonts; i++)
        UI_RegisterFont(&fonts[i]);
}

void UI_FontShutdown (void)
{
    numFonts = 0;
}