/**
 * @brief Parse a @a dlabel definition.
 *
 *        Syntax: dlabel=x,y,width,align,fontfile,"text"
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_dlabel(char *in)
{
    int x, y, w, a, id;
    char fnt[256];
    char txt[256];
    wItem *item;

    if (!window_item("dlabel"))
        return 1;

    if (in_window("video"))
        return 1;
    if (in_window("menu"))
        return 1;

    x = cutItemToInt(in, ',', 0);
    y = cutItemToInt(in, ',', 1);
    w = cutItemToInt(in, ',', 2);
    a = cutItemToInt(in, ',', 3);
    cutItem(in, fnt, ',', 4);
    cutItem(in, txt, ',', 5);
    cutItem(txt, txt, '"', 1);

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    dlabel: \"%s\"\n", txt);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     pos: %d,%d\n", x, y);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     width: %d, align: %d\n", w, a);

    id = fntFindID(fnt);

    if (id < 0) {
        skin_error(MSGTR_SKIN_FONT_NonExistentFont, fnt);
        return 1;
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     font: %s (#%d)\n", fnt, id);

    item = next_item();

    if (!item)
        return 1;

    item->type   = itDLabel;
    item->x      = x;
    item->y      = y;
    item->width  = w;
    item->height = -1;
    item->fontid = id;
    item->align  = a;
    item->label  = strdup(txt);

    if (!item->label) {
        skin_error(MSGTR_SKIN_NotEnoughMemory);
        return 1;
    }

    return 0;
}
/**
 * @brief Parse a @a decoration definition.
 *
 *        Syntax: decoration=enable|disable
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_decoration(char *in)
{
    if (!window_item("decoration"))
        return 1;

    if (in_window("video"))
        return 1;
    if (in_window("playbar"))
        return 1;
    if (in_window("menu"))
        return 1;

    strlower(in);

    if (strcmp(in, "enable") != 0 && strcmp(in, "disable") != 0) {
        skin_error(MSGTR_SKIN_UnknownParameter, in);
        return 1;
    }

    skin->mainDecoration = (strcmp(in, "enable") == 0);

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    decoration: %s\n", in);

    return 0;
}
/**
 * @brief Check whether a @a section definition has started.
 *
 * @param item name of the item to be put in a message in case of an error
 *
 * @return 1 (ok) or 0 (error)
 */
static int section_item(char *item)
{
    if (!skin) {
        skin_error(MSGTR_SKIN_ERROR_SECTION, item);
        return 0;
    }

    return 1;
}
/**
 * @brief Check whether a @a window definition has started.
 *
 * @param item name of the item to be put in a message in case of an error
 *
 * @return 1 (ok) or 0 (error)
 */
static int window_item(char *item)
{
    if (!currWinName[0]) {
        skin_error(MSGTR_SKIN_ERROR_WINDOW, item);
        return 0;
    }

    return 1;
}
/**
 * @brief Parse a @a section definition.
 *
 *        Syntax: section=movieplayer
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_section(char *in)
{
    if (skin) {
        skin_error(MSGTR_SKIN_ERROR_ITEM, "section");
        return 1;
    }

    if (!strcmp(strlower(in), "movieplayer"))
        skin = &guiApp;
    else {
        skin_error(MSGTR_SKIN_UNKNOWN_NAME, in);
        return 1;
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]  section: %s\n", in);

    return 0;
}
/**
 * @brief Check whether a specific @a window definition has started.
 *
 * @param name name of the window to be checked
 *
 * @return 0 (ok) or 1 (error)
 */
static int in_window(char *name)
{
    if (strcmp(currWinName, name) == 0) {
        skin_error(MSGTR_SKIN_ERROR_ITEM, name);
        return 1;
    }

    return 0;
}
Esempio n. 7
0
char* scan_string(const char** document)
{

    const char* cursor = *document;
    int length = 0;
    char* buffer = NULL;
    int i;

    while(*cursor != ARGLISTSEPARATESYM && *cursor != ARGLISTCLOSESYM &&
          *cursor != '\0')
    {
        if(*cursor == COMMENTSYM)
        {
            skip_comment(&cursor);
            continue;
        }

        if(*cursor == TAGSYM)
            cursor++;

        if(*cursor == '\n')
        {
            skin_error(UNEXPECTED_NEWLINE, cursor);
            return NULL;
        }

        length++;
        cursor++;
    }

    /* Copying the string */
    cursor = *document;
    buffer = skin_alloc_string(length);
    if (!buffer)
        return NULL;
    buffer[length] = '\0';
    for(i = 0; i < length; i++)
    {
        if(*cursor == TAGSYM)
            cursor++;

        if(*cursor == COMMENTSYM)
        {
            skip_comment(&cursor);
            i--;
            continue;
        }

        buffer[i] = *cursor;
        cursor++;
    }

    *document = cursor;
    return buffer;
}
/**
 * @brief Parse a @a window definition.
 *
 *        Syntax: window=main|video|playbar|menu
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_window(char *in)
{
    if (!section_item("window"))
        return 1;

    if (currWinName[0]) {
        skin_error(MSGTR_SKIN_ERROR_ITEM, "window");
        return 1;
    }

    strlower(in);

    if (strcmp(in, "sub") == 0)
        strcpy(in, "video");                           // legacy

    if (strcmp(in, "main") == 0) {
        currWin = &skin->main;
        currWinItemIdx = &skin->IndexOfMainItems;
        currWinItems   = skin->mainItems;
    } else if (strcmp(in, "video") == 0) {
        currWin = &skin->video;
        currWinItemIdx = NULL;
        currWinItems   = NULL;
    } else if (strcmp(in, "playbar") == 0) {
        currWin = &skin->playbar;
        currWinItemIdx = &skin->IndexOfPlaybarItems;
        currWinItems   = skin->playbarItems;
    } else if (strcmp(in, "menu") == 0) {
        currWin = &skin->menu;
        currWinItemIdx = &skin->IndexOfMenuItems;
        currWinItems   = skin->menuItems;
    } else {
        skin_error(MSGTR_SKIN_UNKNOWN_NAME, in);
        return 1;
    }

    av_strlcpy(currWinName, in, sizeof(currWinName));

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]   window: %s\n", currWinName);

    return 0;
}
/**
 * @brief Get next free item in current @a window.
 *
 * @return pointer to next free item (ok) or NULL (error)
 */
static wItem *next_item(void)
{
    wItem *item = NULL;

    if (*currWinItemIdx < MAX_ITEMS - 1) {
        (*currWinItemIdx)++;
        item = &currWinItems[*currWinItemIdx];
    } else
        skin_error(MSGTR_SKIN_TooManyItemsDeclared);

    return item;
}
/**
 * @brief Parse a @a font definition.
 *
 *        Syntax: font=fontfile
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_font(char *in)
{
    char fnt[256];

    if (!window_item("font"))
        return 1;

    if (in_window("video"))
        return 1;
    if (in_window("menu"))
        return 1;

    cutItem(in, fnt, ',', 0);   // Note: This seems needless but isn't for compatibility
                                // reasons with a meanwhile depreciated second parameter.
    switch (fntRead(path, fnt)) {
    case -1:
        skin_error(MSGTR_SKIN_NotEnoughMemory);
        return 1;

    case -2:
        skin_error(MSGTR_SKIN_FONT_TooManyFontsDeclared);
        return 1;

    case -3:
        skin_error(MSGTR_SKIN_FONT_FontFileNotFound);
        return 1;

    case -4:
        skin_error(MSGTR_SKIN_FONT_FontImageNotFound);
        return 1;
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    font: %s (#%d)\n", fnt, fntFindID(fnt));

    return 0;
}
/**
 * @brief Read a skin @a image file.
 *
 * @param fname filename (with path)
 * @param img pointer suitable to store the image data
 *
 * @return return code of #bpRead()
 */
int skinImageRead(char *fname, guiImage *img)
{
    int i = bpRead(fname, img);

    switch (i) {
    case -1:
        skin_error(MSGTR_SKIN_BITMAP_16bit, fname);
        break;

    case -2:
        skin_error(MSGTR_SKIN_BITMAP_FileNotFound, fname);
        break;

    case -5:
        skin_error(MSGTR_SKIN_BITMAP_PNGReadError, fname);
        break;

    case -8:
        skin_error(MSGTR_SKIN_BITMAP_ConversionError, fname);
        break;
    }

    return i;
}
/**
 * @brief Parse a @a menu definition.
 *
 *        Syntax: menu=x,y,width,height,message
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_menu(char *in)
{
    int x, y, w, h, message;
    char msg[32];
    wItem *item;

    if (!window_item("menu"))
        return 1;

    if (in_window("main"))
        return 1;
    if (in_window("video"))
        return 1;
    if (in_window("playbar"))
        return 1;

    x = cutItemToInt(in, ',', 0);
    y = cutItemToInt(in, ',', 1);
    w = cutItemToInt(in, ',', 2);
    h = cutItemToInt(in, ',', 3);
    cutItem(in, msg, ',', 4);

    message = appFindMessage(msg);

    if (message == -1) {
        skin_error(MSGTR_SKIN_UnknownMessage, msg);
        return 1;
    }

    item = next_item();

    if (!item)
        return 1;

    item->type    = itMenu;
    item->x       = x;
    item->y       = y;
    item->width   = w;
    item->height  = h;
    item->message = message;

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    item #%d: %d,%d %dx%d\n", *currWinItemIdx, x, y, w, h);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     message: %s (#%d)\n", msg, message);

    item->Bitmap.Image = NULL;

    return 0;
}
/**
 * @brief Parse a @a potmeter definition.
 *
 *        Syntax: potmeter=phases,numphases,default,x,y,width,height,message
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_potmeter(char *in)
{
    unsigned char phfname[256];
    unsigned char buf[512];
    int ph, d, x, y, w, h, message;
    wItem *item;

    if (!window_item("potmeter"))
        return 1;

    if (in_window("video"))
        return 1;
    if (in_window("menu"))
        return 1;

    cutItem(in, phfname, ',', 0);
    ph = cutItemToInt(in, ',', 1);
    d  = cutItemToInt(in, ',', 2);
    x  = cutItemToInt(in, ',', 3);
    y  = cutItemToInt(in, ',', 4);
    w  = cutItemToInt(in, ',', 5);
    h  = cutItemToInt(in, ',', 6);
    cutItem(in, buf, ',', 7);

    message = appFindMessage(buf);

    if (message == -1) {
        skin_error(MSGTR_SKIN_UnknownMessage, buf);
        return 1;
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    potmeter image: %s %d,%d %dx%d\n", phfname, x, y, w, h);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     numphases: %d, default: %d%%\n", ph, d);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     message: %s (#%d)\n", buf, message);

    item = next_item();

    if (!item)
        return 1;

    item->type      = itPotmeter;
    item->x         = x;
    item->y         = y;
    item->width     = w;
    item->height    = h;
    item->numphases = ph;
    item->value     = (float)d;
    item->message   = message;

    item->Bitmap.Image = NULL;

    if (strcmp(phfname, "NULL") != 0) {
        av_strlcpy(buf, path, sizeof(buf));
        av_strlcat(buf, phfname, sizeof(buf));

        if (skinImageRead(buf, &item->Bitmap) != 0)
            return 1;

        mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     (bitmap: %lux%lu)\n", item->Bitmap.Width, item->Bitmap.Height);
    }

    return 0;
}
/**
 * @brief Parse a @a button definition.
 *
 *        Syntax: button=image,x,y,width,height,message
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_button(char *in)
{
    unsigned char fname[256];
    unsigned char file[512];
    int x, y, w, h, message;
    char msg[32];
    wItem *item;

    if (!window_item("button"))
        return 1;

    if (in_window("video"))
        return 1;
    if (in_window("menu"))
        return 1;

    cutItem(in, fname, ',', 0);
    x = cutItemToInt(in, ',', 1);
    y = cutItemToInt(in, ',', 2);
    w = cutItemToInt(in, ',', 3);
    h = cutItemToInt(in, ',', 4);
    cutItem(in, msg, ',', 5);

    message = appFindMessage(msg);

    if (message == -1) {
        skin_error(MSGTR_SKIN_UnknownMessage, msg);
        return 1;
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    button image: %s %d,%d\n", fname, x, y);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     message: %s (#%d)\n", msg, message);
    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     size: %dx%d\n", w, h);

    item = next_item();

    if (!item)
        return 1;

    item->type    = itButton;
    item->x       = x;
    item->y       = y;
    item->width   = w;
    item->height  = h;
    item->message = message;
    item->pressed = btnReleased;

    if (item->message == evPauseSwitchToPlay)
        item->pressed = btnDisabled;

    item->Bitmap.Image = NULL;

    if (strcmp(fname, "NULL") != 0) {
        av_strlcpy(file, path, sizeof(file));
        av_strlcat(file, fname, sizeof(file));

        if (skinImageRead(file, &item->Bitmap) != 0)
            return 1;

        mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     (bitmap: %lux%lu)\n", item->Bitmap.Width, item->Bitmap.Height);
    }

    return 0;
}
/**
 * @brief Read and parse a skin.
 *
 * @param sname name of the skin
 *
 * @return 0 (ok), -1 (skin file not found or not readable) or -2 (parsing error)
 */
int skinRead(char *sname)
{
    char *skinfname;
    FILE *skinfile;
    unsigned char line[256];
    unsigned char item[32];
    unsigned char param[256];
    unsigned int i;

    skinfname = setname(skinDirInHome, sname);

    if ((skinfile = fopen(skinfname, "rt")) == NULL) {
        skinfname = setname(skinMPlayerDir, sname);

        if ((skinfile = fopen(skinfname, "rt")) == NULL) {
            mp_msg(MSGT_GPLAYER, MSGL_ERR, MSGTR_SKIN_SkinFileNotFound, skinfname);
            return -1;
        }
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin] configuration file: %s\n", skinfname);

    appFreeStruct();

    skin = NULL;
    currWinName[0] = 0;
    linenumber     = 0;

    while (fgetstr(line, sizeof(line), skinfile)) {
        linenumber++;

        strswap(line, '\t', ' ');
        trim(line);
        decomment(line);

        if (!*line)
            continue;

        cutItem(line, item, '=', 0);
        cutItem(line, param, '=', 1);
        strlower(item);

        for (i = 0; i < FF_ARRAY_ELEMS(skinItem); i++) {
            if (!strcmp(item, skinItem[i].name)) {
                if (skinItem[i].func(param) != 0)
                    return -2;
                else
                    break;
            }
        }

        if (i == FF_ARRAY_ELEMS(skinItem)) {
            skin_error(MSGTR_SKIN_UNKNOWN_ITEM, item);
            return -2;
        }
    }

    if (linenumber == 0) {
        mp_msg(MSGT_GPLAYER, MSGL_ERR, MSGTR_SKIN_SkinFileNotReadable, skinfname);
        return -1;
    }

    return 0;
}
Esempio n. 16
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struct skin_element* skin_parse(const char* document, 
                                skin_callback cb, void* cb_data)
{
    callback = cb;
    callback_data = cb_data;
#else
struct skin_element* skin_parse(const char* document)
{
#endif
    struct skin_element* root = NULL;
    struct skin_element* last = NULL;

    const char* cursor = document; /*Keeps track of location in the document*/
    
    skin_line = 1;
    skin_start = (char*)document;
    viewport_line = 0;

    skin_clear_errors();

    while(*cursor != '\0')
    {
        struct skin_element* tree = skin_parse_viewport(&cursor);
        if(!root)
        {
            root = tree;
            last = root;
        }
        else
        {
            last->next = skin_buffer_to_offset(tree);
            last = tree;
        }

        if(!last)
        {
            skin_free_tree(root); /* Clearing any memory already used */
            return NULL;
        }

        /* Making sure last is at the end */
        while(IS_VALID_OFFSET(last->next))
            last = skin_buffer_from_offset(last->next);

    }
    return root;

}

static struct skin_element* skin_parse_viewport(const char** document)
{
    struct skin_element* root = NULL;
    struct skin_element* last = NULL;
    struct skin_element* retval = NULL;

    retval = skin_alloc_element();
    if (!retval)
        return NULL;
    retval->type = VIEWPORT;
    retval->children_count = 1;
    retval->line = skin_line;
    viewport_line = skin_line;

    OFFSETTYPE(struct skin_element*)* children;

    const char* cursor = *document; /* Keeps track of location in the document */
    const char* bookmark; /* Used when we need to look ahead */

    int sublines = 0; /* Flag for parsing sublines */

    /* Parsing out the viewport tag if there is one */
    if(check_viewport(cursor))
    {
        if (!skin_parse_tag(retval, &cursor))
            return NULL;
        if(*cursor == '\n')
        {
            cursor++;
            skin_line++;
        }
    }
#ifdef ROCKBOX
    else if (callback)
    {
        if (callback(retval, callback_data) == CALLBACK_ERROR)
        {
            skin_error(GOT_CALLBACK_ERROR, cursor);
            return NULL;
        }
    }
#endif

    if (check_viewport(cursor))
    {
        retval->children_count = 0;
        *document = cursor;
        return retval;
    }
    retval->children_count = 1;
    children = skin_alloc_children(1);
    if (!children)
        return NULL;
    do
    {

        /* First, we check to see if this line will contain sublines */
        bookmark = cursor;
        sublines = 0;
        while(*cursor != '\n' && *cursor != '\0'
              && !(check_viewport(cursor) && cursor != *document))
        {
            if(*cursor == MULTILINESYM)
            {
                sublines = 1;
                break;
            }
            else if(*cursor == TAGSYM)
            {
                skip_tag(&cursor);
            }
            else if(*cursor == COMMENTSYM)
            {
                skip_comment(&cursor);
            }
            else
            {
                /* Advancing the cursor as normal */
                cursor++;
            }
        }
        cursor = bookmark;

        if(sublines)
        {
            struct skin_element* out = skin_parse_sublines(&cursor);
            if (!root)
            {
                root = out;
                last = root;
            }
            else
            {
                last->next = skin_buffer_to_offset(out);
                last = out;
            }
            if(!last)
                return NULL;
        }
        else
        {
#ifdef ROCKBOX
            /* strip all leading comments */
            while(*cursor == '#')
            {
                skip_comment(&cursor);
                skin_line++;
                
            }
            if (check_viewport(cursor))
                break;
#endif

            struct skin_element* out = skin_parse_line(&cursor);
            if (!root)
            {
                root = out;
                last = root;
            }
            else
            {
                last->next = skin_buffer_to_offset(out);
                last = out;
            }
            if(!last)
                return NULL;

        }
        /* Making sure last is at the end */
        while(IS_VALID_OFFSET(last->next))
            last = skin_buffer_from_offset(last->next);

        if(*cursor == '\n')
        {
            cursor++;
            skin_line++;
        }
#ifdef ROCKBOX
        /* strip all comments */
        while(*cursor == '#')
        {
            skip_comment(&cursor);
            skin_line++;
            
        }
        if (check_viewport(cursor))
            break;
#endif

    }
    while(*cursor != '\0' && !(check_viewport(cursor) && cursor != *document));

    *document = cursor;

    children[0] = skin_buffer_to_offset(root);
    retval->children = skin_buffer_to_offset(children);
    return retval;
}

/* Auxiliary Parsing Functions */

static struct skin_element* skin_parse_line(const char**document)
{
    return skin_parse_line_optional(document, 0);
}

/*
 * If conditional is set to true, then this will break upon encountering
 * SEPARATESYM.  This should only be used when parsing a line inside a
 * conditional, otherwise just use the wrapper function skin_parse_line()
 */
static struct skin_element* skin_parse_line_optional(const char** document,
                                                     int conditional)
{
    const char* cursor = *document;

    struct skin_element* root = NULL;
    struct skin_element* current = NULL;
    struct skin_element* retval = NULL;
    OFFSETTYPE(struct skin_element*)* children = NULL;

    /* A wrapper for the line */
    retval = skin_alloc_element();
    if (!retval)
        return NULL;
    retval->type = LINE;
    retval->line = skin_line;
    while (*cursor == '\t')
        cursor++;

    if(*cursor != '\0' && *cursor != '\n' && *cursor != MULTILINESYM
       && !(conditional && (*cursor == ARGLISTSEPARATESYM
                            || *cursor == ARGLISTCLOSESYM
                            || *cursor == ENUMLISTSEPARATESYM
                            || *cursor == ENUMLISTCLOSESYM)))
    {
        retval->children_count = 1;
    }
    else
    {
        retval->children_count = 0;
    }

    if(retval->children_count > 0)
    {
        children = skin_alloc_children(1);
        if (!children)
            return NULL;
    }

#ifdef ROCKBOX
    if (callback)
    {
        switch (callback(retval, callback_data))
        {
            case CALLBACK_ERROR:
                skin_error(GOT_CALLBACK_ERROR, cursor);
                return NULL;
            default:
                break;
        }
    }
#endif

    while(*cursor != '\n' && *cursor != '\0' && *cursor != MULTILINESYM
          && !((*cursor == ARGLISTSEPARATESYM
                || *cursor == ARGLISTCLOSESYM
                || *cursor == ENUMLISTSEPARATESYM
                || *cursor == ENUMLISTCLOSESYM)
               && conditional)
          && !(check_viewport(cursor) && cursor != *document))
    {
        /* Allocating memory if necessary */
        if(root)
        {
            struct skin_element *next = skin_alloc_element();
            if (!next)
                return NULL;
            current->next = skin_buffer_to_offset(next);
            current = next;
        }
        else
        {
            current = skin_alloc_element();
            if (!current)
                return NULL;
            root = current;
        }

        /* Parsing the current element */
        if(*cursor == TAGSYM && cursor[1] == CONDITIONSYM)
        {
            if(!skin_parse_conditional(current, &cursor))
                return NULL;
        }
        else if(*cursor == TAGSYM && !find_escape_character(cursor[1]))
        {
            if(!skin_parse_tag(current, &cursor))
                return NULL;
        }
        else if(*cursor == COMMENTSYM)
        {
            if(!skin_parse_comment(current, &cursor))
                return NULL;
        }
        else
        {
            if(!skin_parse_text(current, &cursor, conditional))
                return NULL;
        }
    }

    /* Moving up the calling function's pointer */
    *document = cursor;
    
    if(root)
    {
        children[0] = skin_buffer_to_offset(root);
        retval->children = skin_buffer_to_offset(children);
    }
    return retval;
}

static struct skin_element* skin_parse_sublines(const char** document)
{
    return skin_parse_sublines_optional(document, 0);
}

static struct skin_element* skin_parse_sublines_optional(const char** document,
                                                  int conditional)
{
    struct skin_element* retval;
    OFFSETTYPE(struct skin_element*)* children;
    const char* cursor = *document;
    int sublines = 1;
    int i;

    retval = skin_alloc_element();
    if (!retval)
        return NULL;
    retval->type = LINE_ALTERNATOR;
    retval->next = skin_buffer_to_offset(NULL);
    retval->line = skin_line;
    while (*cursor == '\t')
        cursor++;

    /* First we count the sublines */
    while(*cursor != '\0' && *cursor != '\n'
          && !((*cursor == ARGLISTSEPARATESYM
                || *cursor == ARGLISTCLOSESYM
                || *cursor == ENUMLISTSEPARATESYM
                || *cursor == ENUMLISTCLOSESYM)
               && conditional)
          && !(check_viewport(cursor) && cursor != *document))
    {
        if(*cursor == COMMENTSYM)
        {
            skip_comment(&cursor);
        }
        else if(*cursor == TAGSYM)
        {
            skip_tag(&cursor);
        }
        else if(*cursor == MULTILINESYM)
        {
            sublines++;
            cursor++;
        }
        else
        {
            cursor++;
        }
    }

    /* ...and then we parse them */
    retval->children_count = sublines;
    children = skin_alloc_children(sublines);
    if (!children)
        return NULL;

    cursor = *document;
    for(i = 0; i < sublines; i++)
    {
        children[i] = skin_buffer_to_offset(skin_parse_line_optional(&cursor, conditional));
        if (children[i] < 0)
            return NULL;
        skip_whitespace(&cursor);

        if(*cursor != MULTILINESYM && i != sublines - 1)
        {
            skin_error(MULTILINE_EXPECTED, cursor);
            return NULL;
        }
        else if(i != sublines - 1)
        {
            cursor++;
        }
    }

#ifdef ROCKBOX
    if (callback)
    {
        if (callback(retval, callback_data) == CALLBACK_ERROR)
        {
            skin_error(GOT_CALLBACK_ERROR, *document);
            return NULL;
        }
    }
#endif
    *document = cursor;
    retval->children = skin_buffer_to_offset(children);

    return retval;
}

static int skin_parse_tag(struct skin_element* element, const char** document)
{
    const char* cursor = *document + 1;
    const char* bookmark;
    char *open_square_bracket = NULL;

    char tag_name[MAX_TAG_LENGTH];
    char* tag_args;
    const struct tag_info *tag;
    struct skin_tag_parameter* params = NULL;

    int num_args = 1;
    int i;
    int qmark = 0; /* Flag for the all-or-none option */

    int optional = 0;

    /* Checking the tag name */
    for (i=0; cursor[i] && i<MAX_TAG_LENGTH; i++)
        tag_name[i] = cursor[i];

    /* First we check the two characters after the '%', then a single char */
    tag = NULL;
    i = MAX_TAG_LENGTH;
    while (!tag && i > 1)
    {
        tag_name[i-1] = '\0';
        tag = find_tag(tag_name);
        i--;
    }

    if(!tag)
    {
        skin_error(ILLEGAL_TAG, cursor);
        return 0;
    }
    cursor += i;

    /* Copying basic tag info */
    if(element->type != CONDITIONAL && element->type != VIEWPORT)
        element->type = TAG;
    element->tag = tag;
    tag_args = tag->params;
    element->line = skin_line;

    /* Checking for the * flag */
    if(tag_args[0] == '?')
    {
        qmark = 1;
        tag_args++;
    }

    /* If this tag has no arguments, we can bail out now */
    if(strlen(tag_args) == 0
       || (tag_args[0] == '|' && *cursor != ARGLISTOPENSYM)
       || (qmark && *cursor != ARGLISTOPENSYM))
    {
        
#ifdef ROCKBOX
        if (callback)
        {
            if (callback(element, callback_data) == CALLBACK_ERROR)
            {
                skin_error(GOT_CALLBACK_ERROR, cursor);
                return 0;
            }
        }
#endif
        *document = cursor;
        return 1;
    }

    /* Checking the number of arguments and allocating args */
    if(*cursor != ARGLISTOPENSYM && tag_args[0] != '|')
    {
        skin_error(ARGLIST_EXPECTED, cursor);
        return 0;
    }
    else
    {
        cursor++;
    }

    bookmark = cursor;
    while(*cursor != '\n' && *cursor != '\0' && *cursor != ARGLISTCLOSESYM)
    {
        /* Skipping over escaped characters */
        if(*cursor == TAGSYM && *(cursor+1) != ARGLISTSEPARATESYM)
        {
            skip_tag(&cursor);
        }
        else if(*cursor == COMMENTSYM)
        {
            skip_comment(&cursor);
        }
        else if(*cursor == ARGLISTSEPARATESYM)
        {
            num_args++;
            cursor++;
        }
        else
        {
            cursor++;
        }
    }

    cursor = bookmark; /* Restoring the cursor */
    element->params_count = num_args;
    params = skin_alloc_params(num_args);
    if (!params)
        return 0;

    /* Now we have to actually parse each argument */
    for(i = 0; i < num_args; i++)
    {
        char type_code;
        /* Making sure we haven't run out of arguments */
        if(*tag_args == '\0')
        {
            skin_error(TOO_MANY_ARGS, cursor);
            return 0;
        }

        /* Checking for the optional bar */
        if(*tag_args == '|')
        {
            optional = 1;
            tag_args++;
        }

        /* Scanning the arguments */
        skip_whitespace(&cursor);

        /* Checking for comments */
        if(*cursor == COMMENTSYM)
            skip_comment(&cursor);

        if (*tag_args == '[')
        {
            /* we need to guess which type of param it is. 
             * guess using this priority:
             * default > decimal/integer > single tag/code > string
             */
            int j=0;
            bool canbedefault = false, last_char_is_percent = false;
            bool haspercent = false, number = true, hasdecimal = false;
            char temp_params[8];
            open_square_bracket = tag_args;
            tag_args++;
            while (*tag_args != ']')
            {
                if (*tag_args >= 'a' && *tag_args <= 'z')
                    canbedefault = true;
                temp_params[j++] = tolower(*tag_args++);
            }
            temp_params[j] = '\0';
            j = 0;
            while (cursor[j] && cursor[j] != ',' && cursor[j] != ')')
            {
                haspercent = haspercent || (cursor[j] == '%');
                hasdecimal = hasdecimal || (cursor[j] == '.');
                number = number && (isdigit(cursor[j]) || 
                                    (cursor[j] == '.') ||
                                    (cursor[j] == '-') ||
                                    (cursor[j] == '%'));
                j++;
            }
            last_char_is_percent = cursor[j-1] == '%';
            type_code = '?';
            if (canbedefault && *cursor == DEFAULTSYM && !isdigit(cursor[1]))
            {
                type_code = 'i';
            }
            else if (number && hasdecimal && strchr(temp_params, 'd'))
            {
                type_code = 'd';
            }
            else if (number && last_char_is_percent && strchr(temp_params, 'p'))
            {
                type_code = 'p';
            }
            else if (number && 
                     (strchr(temp_params, 'i') || strchr(temp_params, 'd')))
            {
                type_code = strchr(temp_params, 'i') ? 'i' : 'd';
            }
            else if (haspercent && 
                    (strchr(temp_params, 't') || strchr(temp_params, 'c')))
            {
                type_code = strchr(temp_params, 't') ? 't' : 'c';
            }
            else if (strchr(temp_params, 's'))
            {
                type_code = 's';
            }
            if (type_code == '?')
            {
                skin_error(INSUFFICIENT_ARGS, cursor);
                return 0;
            }   
        }
        else
            type_code = *tag_args;
        /* Storing the type code */
        params[i].type_code = type_code;

        /* Checking a nullable argument for null. */
        if(*cursor == DEFAULTSYM && !isdigit(cursor[1]))
        {
            if(islower(type_code))
            {
                params[i].type = DEFAULT;
                cursor++;
            }
            else
            {
                skin_error(DEFAULT_NOT_ALLOWED, cursor);
                return 0;
            }
        }
        else if(tolower(type_code) == 'i')
        {
            /* Scanning an int argument */
            if(!isdigit(*cursor) && *cursor != '-')
            {
                skin_error(INT_EXPECTED, cursor);
                return 0;
            }

            params[i].type = INTEGER;
            params[i].data.number = scan_int(&cursor);
        }
        else if(tolower(type_code) == 'd' || tolower(type_code) == 'p')
        {
            int val = 0;
            bool have_point = false;
            bool have_tenth = false;
            while ( isdigit(*cursor) || *cursor == '.' )
            {
                if (*cursor != '.')
                {
                    val *= 10;
                    val += *cursor - '0';
                    if (have_point)
                    {
                        have_tenth = true;
                        cursor++;
                        break;
                    }
                }
                else
                    have_point = true;
                cursor++;
            }
            if (have_tenth == false)
                val *= 10;
            if (tolower(type_code) == 'd')
                params[i].type = DECIMAL;
            else
            {
                params[i].type = PERCENT;
                cursor++; /* skip trailing % sign */
            }
            params[i].data.number = val;
        }
        else if(tolower(type_code) == 's' || tolower(type_code) == 'f')
        {
            /* Scanning a string argument */
            params[i].type = STRING;
            params[i].data.text = skin_buffer_to_offset(scan_string(&cursor));

        }
        else if(tolower(type_code) == 'c')
        {
            /* Recursively parsing a code argument */
            params[i].type = CODE;
            params[i].data.code = skin_buffer_to_offset(skin_parse_code_as_arg(&cursor));
            if(params[i].data.code < 0)
                return 0;
        }
        else if (tolower(type_code) == 't')
        {
            struct skin_element* child = skin_alloc_element();
            child->type = TAG;
            if (!skin_parse_tag(child, &cursor))
                return 0;
            child->next = skin_buffer_to_offset(NULL);
            params[i].type = CODE;
            params[i].data.code = skin_buffer_to_offset(child);
        }
            

        skip_whitespace(&cursor);

        if(*cursor != ARGLISTSEPARATESYM && i < num_args - 1)
        {
            skin_error(SEPARATOR_EXPECTED, cursor);
            return 0;
        }
        else if(*cursor != ARGLISTCLOSESYM && i == num_args - 1)
        {
            skin_error(CLOSE_EXPECTED, cursor);
            return 0;
        }
        else
        {
            cursor++;
        }

        if (*(tag_args + 1) == '*')
        {
            if (i+1 == num_args)
                tag_args += 2;
            else if (open_square_bracket  && *tag_args == ']')
            {
                tag_args = open_square_bracket;
                open_square_bracket = NULL;
            }
        }
        else
            tag_args++;

        /* Checking for the optional bar */
        if(*tag_args == '|')
        {
            optional = 1;
            tag_args++;
        }
    }
    element->params = skin_buffer_to_offset(params);

    /* Checking for a premature end */
    if(*tag_args != '\0' && !optional)
    {
        skin_error(INSUFFICIENT_ARGS, cursor);
        return 0;
    }
#ifdef ROCKBOX
    if (callback)
    {
        if (callback(element, callback_data) == CALLBACK_ERROR)
        {
            skin_error(GOT_CALLBACK_ERROR, *document);
            return 0;
        }
    }
#endif
    *document = cursor;

    return 1;
}

/*
 * If the conditional flag is set true, then parsing text will stop at an
 * ARGLISTSEPARATESYM.  Only set that flag when parsing within a conditional
 */
static int skin_parse_text(struct skin_element* element, const char** document,
                           int conditional)
{
    const char* cursor = *document;
    int length = 0;
    int dest;
    char *text = NULL;

    /* First figure out how much text we're copying */
    while(*cursor != '\0' && *cursor != '\n' && *cursor != MULTILINESYM
          && *cursor != COMMENTSYM
          && !((*cursor == ARGLISTSEPARATESYM
                || *cursor == ARGLISTCLOSESYM
                || *cursor == ENUMLISTSEPARATESYM
                || *cursor == ENUMLISTCLOSESYM)
               && conditional))
    {
        /* Dealing with possibility of escaped characters */
        if(*cursor == TAGSYM)
        {
            if(find_escape_character(cursor[1]))
                cursor++;
            else
                break;
        }

        length++;
        cursor++;
    }

    cursor = *document;

    /* Copying the text into the element struct */
    element->type = TEXT;
    element->line = skin_line;
    element->next = skin_buffer_to_offset(NULL);
    text = skin_alloc_string(length);
    element->data = skin_buffer_to_offset(text);
    if (element->data < 0)
        return 0;
    
    for(dest = 0; dest < length; dest++)
    {
        /* Advancing cursor if we've encountered an escaped character */
        if(*cursor == TAGSYM)
            cursor++;

        text[dest] = *cursor;
        cursor++;
    }
    text[length] = '\0';
    
#ifdef ROCKBOX
    if (callback)
    {
        if (callback(element, callback_data) == CALLBACK_ERROR)
        {
            skin_error(GOT_CALLBACK_ERROR, *document);
            return 0;
        }
    }
#endif

    *document = cursor;

    return 1;
}

static int skin_parse_conditional(struct skin_element* element, const char** document)
{
    const char* cursor = *document + 1; /* Starting past the "%" */
    const char* bookmark;
    int children = 1;
    int i;
    
#ifdef ROCKBOX
    bool feature_available = true;
    const char *false_branch = NULL;
    const char *conditional_end = NULL;
#endif
    OFFSETTYPE(struct skin_element*)* children_array = NULL;

    /* Some conditional tags allow for target feature checking,
     * so to handle that call the callback as usual with type == TAG
     * then call it a second time with type == CONDITIONAL and check the return
     * value */
    element->type = TAG;
    element->line = skin_line;

    /* Parsing the tag first */
    if(!skin_parse_tag(element, &cursor))
        return 0;

    element->type = CONDITIONAL;
#ifdef ROCKBOX
    if (callback)
    {
        switch (callback(element, callback_data))
        {
            case FEATURE_NOT_AVAILABLE:
                feature_available = false;
                break;
            case CALLBACK_ERROR:
                return 0;
            default:
                break;
        }
    }
#endif
    
    /* Counting the children */
    if(*(cursor++) != ENUMLISTOPENSYM)
    {
        skin_error(ARGLIST_EXPECTED, cursor);
        return 0;
    }
    bookmark = cursor;
    while(*cursor != ENUMLISTCLOSESYM && *cursor != '\0')
    {
        if(*cursor == COMMENTSYM)
        {
            skip_comment(&cursor);
        }
        else if(*cursor == TAGSYM)
        {
            skip_tag(&cursor);
        }
        else if(*cursor == ENUMLISTSEPARATESYM)
        {
            children++;
            cursor++;
            if (*cursor == '\n')
                cursor++;
#ifdef ROCKBOX
            if (false_branch == NULL && !feature_available)
            {
                false_branch = cursor;
                children--;
            }
#endif
        }
        else
        {
            cursor++;
        }
    }
#ifdef ROCKBOX
    if (*cursor == ENUMLISTCLOSESYM && 
        false_branch == NULL && !feature_available)
    {
        false_branch = cursor+1;
        children--;
    }
    if (element->tag->flags&FEATURE_TAG)
    {
        if (feature_available && children > 1)
            children--;
    }
    conditional_end = cursor;
    /* if we are skipping the true branch fix that up */
    cursor = false_branch ? false_branch : bookmark;
#else
    cursor = bookmark;
#endif
    /* Parsing the children */
    
    /* Feature tags could end up having 0 children which breaks
     * the render in dangerous ways. Minor hack, but insert an empty
     * child.  (e.g %?xx<foo> when xx isnt available ) */
    
    if (children == 0)
    {
        const char* emptyline= "";
        children = 1;
        children_array = skin_alloc_children(children);
        if (!children_array)
            return 0;
        element->children_count = children;
        children_array[0] = skin_buffer_to_offset(skin_parse_code_as_arg(&emptyline));
    }
    else
    {    
        children_array = skin_alloc_children(children);
        if (!children_array)
            return 0;
        element->children_count = children;

        for(i = 0; i < children; i++)
        {
            if (*cursor == '\n')
            {
                skin_line++;
                cursor++;
            }
            children_array[i] = skin_buffer_to_offset(skin_parse_code_as_arg(&cursor));
            if (children_array[i] < 0)
                return 0;
            skip_whitespace(&cursor);
#ifdef ROCKBOX
            if ((element->tag->flags&FEATURE_TAG) && feature_available)
                cursor = conditional_end;
#endif

            if(i < children - 1 && *cursor != ENUMLISTSEPARATESYM)
            {
                skin_error(SEPARATOR_EXPECTED, cursor);
                return 0;
            }
            else if(i == children - 1 && *cursor != ENUMLISTCLOSESYM)
            {
                skin_error(CLOSE_EXPECTED, cursor);
                return 0;
            }
            else
            {
                cursor++;
            }
        }
    }
    *document = cursor;
    element->children = skin_buffer_to_offset(children_array);

    return 1;
}

static int skin_parse_comment(struct skin_element* element, const char** document)
{
    const char* cursor = *document;
#ifndef ROCKBOX
    char* text = NULL;
#endif
    int length;
    /*
     * Finding the index of the ending newline or null-terminator
     * The length of the string of interest doesn't include the leading #, the
     * length we need to reserve is the same as the index of the last character
     */
    for(length = 0; cursor[length] != '\n' && cursor[length] != '\0'; length++);

    element->type = COMMENT;
    element->line = skin_line;
#ifdef ROCKBOX 
    element->data = INVALID_OFFSET;
#else    
    element->data = text = skin_alloc_string(length);
    if (!element->data)
        return 0;
    /* We copy from one char past cursor to leave out the # */
    memcpy((void*)text, (void*)(cursor + 1),
           sizeof(char) * (length-1));
    text[length - 1] = '\0';
#endif
    if(cursor[length] == '\n')
        skin_line++;

    *document += (length); /* Move cursor up past # and all text */
    if(**document == '\n')
        (*document)++;

    return 1;
}

static struct skin_element* skin_parse_code_as_arg(const char** document)
{
    int sublines = 0;
    const char* cursor = *document;

    /* Checking for sublines */
    while(*cursor != '\n' && *cursor != '\0'
          && *cursor != ENUMLISTSEPARATESYM && *cursor != ARGLISTSEPARATESYM
          && *cursor != ENUMLISTCLOSESYM && *cursor != ARGLISTCLOSESYM)
    {
        if(*cursor == MULTILINESYM)
        {
            sublines = 1;
            break;
        }
        else if(*cursor == TAGSYM)
        {
            skip_tag(&cursor);
        }
        else
        {
            /* Advancing the cursor as normal */
            cursor++;
        }
    }

    if(sublines)
        return skin_parse_sublines_optional(document, 1);
    else
        return skin_parse_line_optional(document, 1);
}
/**
 * @brief Parse a @a base definition.
 *
 *        Syntax: base=image,x,y[,width,height]
 *
 * @param in definition to be analyzed
 *
 * @return 0 (ok) or 1 (error)
 */
static int item_base(char *in)
{
    unsigned char fname[256];
    unsigned char file[512];
    int x, y;
    int w = 0, h = 0;
    int is_video, is_bar, is_menu;

    if (!window_item("base"))
        return 1;

    is_video = (strcmp(currWinName, "video") == 0);
    is_bar   = (strcmp(currWinName, "playbar") == 0);
    is_menu  = (strcmp(currWinName, "menu") == 0);

    cutItem(in, fname, ',', 0);
    x = cutItemToInt(in, ',', 1);
    y = cutItemToInt(in, ',', 2);
    w = cutItemToInt(in, ',', 3);
    h = cutItemToInt(in, ',', 4);

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]    image: %s", fname);

    currWin->type = itBase;

    if (!is_menu) {
        currWin->x = x;
        currWin->y = y;

        mp_msg(MSGT_GPLAYER, MSGL_DBG2, " %d,%d", x, y);
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "\n");

    av_strlcpy(file, path, sizeof(file));
    av_strlcat(file, fname, sizeof(file));

    if (skinImageRead(file, &currWin->Bitmap) != 0)
        return 1;

    currWin->width  = currWin->Bitmap.Width;
    currWin->height = currWin->Bitmap.Height;

    if (is_video) {
        if (w && h) {
            currWin->width  = w;
            currWin->height = h;
        }
    }

    mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     bitmap: %dx%d\n", currWin->width, currWin->height);

    if (!is_video) {
        if (!bpRenderMask(&currWin->Bitmap, &currWin->Mask)) {
            skin_error(MSGTR_SKIN_NotEnoughMemory);
            return 1;
        }
        mp_msg(MSGT_GPLAYER, MSGL_DBG2, "[skin]     mask: %lux%lu\n", currWin->Mask.Width, currWin->Mask.Height);
    }

    if (is_bar)
        skin->playbarIsPresent = 1;
    if (is_menu)
        skin->menuIsPresent = 1;

    return 0;
}