Function get_char_widths

src_classic/utils.py:2975–3070

Get list of glyph information of a font. Notes: Must be provided by its XREF number. If we already dealt with the font, it will be recorded in doc.FontInfos. Otherwise we insert an entry there. Finally we return the glyphs for the font. This is a list of

(
    doc: Document, xref: int, limit: int = 256, idx: int = 0, fontdict: OptDict = None
)

def get_char_widths(
    doc: Document, xref: int, limit: int = 256, idx: int = 0, fontdict: OptDict = None
) -> list:
    """Get list of glyph information of a font.

    Notes:
        Must be provided by its XREF number. If we already dealt with the
        font, it will be recorded in doc.FontInfos. Otherwise we insert an
        entry there.
        Finally we return the glyphs for the font. This is a list of
        (glyph, width) where glyph is an integer controlling the char
        appearance, and width is a float controlling the char's spacing:
        width * fontsize is the actual space.
        For 'simple' fonts, glyph == ord(char) will usually be true.
        Exceptions are 'Symbol' and 'ZapfDingbats'. We are providing data for these directly here.
    """
    fontinfo = CheckFontInfo(doc, xref)
    if fontinfo is None:  # not recorded yet: create it
        if fontdict is None:
            name, ext, stype, asc, dsc = _get_font_properties(doc, xref)
            fontdict = {
                "name": name,
                "type": stype,
                "ext": ext,
                "ascender": asc,
                "descender": dsc,
            }
        else:
            name = fontdict["name"]
            ext = fontdict["ext"]
            stype = fontdict["type"]
            ordering = fontdict["ordering"]
            simple = fontdict["simple"]

        if ext == "":
            raise ValueError("xref is not a font")

        # check for 'simple' fonts
        if stype in ("Type1", "MMType1", "TrueType"):
            simple = True
        else:
            simple = False

        # check for CJK fonts
        if name in ("Fangti", "Ming"):
            ordering = 0
        elif name in ("Heiti", "Song"):
            ordering = 1
        elif name in ("Gothic", "Mincho"):
            ordering = 2
        elif name in ("Dotum", "Batang"):
            ordering = 3
        else:
            ordering = -1

        fontdict["simple"] = simple

        if name == "ZapfDingbats":