<h2>Editing File: /usr/lib64/python3.12/tkinter/font.py</h2><form method='post'><textarea name='content' class='file-edit'># Tkinter font wrapper
#
# written by Fredrik Lundh, February 1998
#

import itertools
import tkinter

__version__ = &quot;0.9&quot;
__all__ = [&quot;NORMAL&quot;, &quot;ROMAN&quot;, &quot;BOLD&quot;, &quot;ITALIC&quot;,
           &quot;nametofont&quot;, &quot;Font&quot;, &quot;families&quot;, &quot;names&quot;]

# weight/slant
NORMAL = &quot;normal&quot;
ROMAN = &quot;roman&quot;
BOLD   = &quot;bold&quot;
ITALIC = &quot;italic&quot;


def nametofont(name, root=None):
    &quot;&quot;&quot;Given the name of a tk named font, returns a Font representation.
    &quot;&quot;&quot;
    return Font(name=name, exists=True, root=root)


class Font:
    &quot;&quot;&quot;Represents a named font.

    Constructor options are:

    font -- font specifier (name, system font, or (family, size, style)-tuple)
    name -- name to use for this font configuration (defaults to a unique name)
    exists -- does a named font by this name already exist?
       Creates a new named font if False, points to the existing font if True.
       Raises _tkinter.TclError if the assertion is false.

       the following are ignored if font is specified:

    family -- font 'family', e.g. Courier, Times, Helvetica
    size -- font size in points
    weight -- font thickness: NORMAL, BOLD
    slant -- font slant: ROMAN, ITALIC
    underline -- font underlining: false (0), true (1)
    overstrike -- font strikeout: false (0), true (1)

    &quot;&quot;&quot;

    counter = itertools.count(1)

    def _set(self, kw):
        options = []
        for k, v in kw.items():
            options.append(&quot;-&quot;+k)
            options.append(str(v))
        return tuple(options)

    def _get(self, args):
        options = []
        for k in args:
            options.append(&quot;-&quot;+k)
        return tuple(options)

    def _mkdict(self, args):
        options = {}
        for i in range(0, len(args), 2):
            options[args[i][1:]] = args[i+1]
        return options

    def __init__(self, root=None, font=None, name=None, exists=False,
                 **options):
        if root is None:
            root = tkinter._get_default_root('use font')
        tk = getattr(root, 'tk', root)
        if font:
            # get actual settings corresponding to the given font
            font = tk.splitlist(tk.call(&quot;font&quot;, &quot;actual&quot;, font))
        else:
            font = self._set(options)
        if not name:
            name = &quot;font&quot; + str(next(self.counter))
        self.name = name

        if exists:
            self.delete_font = False
            # confirm font exists
            if self.name not in tk.splitlist(tk.call(&quot;font&quot;, &quot;names&quot;)):
                raise tkinter._tkinter.TclError(
                    &quot;named font %s does not already exist&quot; % (self.name,))
            # if font config info supplied, apply it
            if font:
                tk.call(&quot;font&quot;, &quot;configure&quot;, self.name, *font)
        else:
            # create new font (raises TclError if the font exists)
            tk.call(&quot;font&quot;, &quot;create&quot;, self.name, *font)
            self.delete_font = True
        self._tk = tk
        self._split = tk.splitlist
        self._call  = tk.call

    def __str__(self):
        return self.name

    def __repr__(self):
        return f&quot;&lt;{self.__class__.__module__}.{self.__class__.__qualname__}&quot; \
               f&quot; object {self.name!r}&gt;&quot;

    def __eq__(self, other):
        if not isinstance(other, Font):
            return NotImplemented
        return self.name == other.name and self._tk == other._tk

    def __getitem__(self, key):
        return self.cget(key)

    def __setitem__(self, key, value):
        self.configure(**{key: value})

    def __del__(self):
        try:
            if self.delete_font:
                self._call(&quot;font&quot;, &quot;delete&quot;, self.name)
        except Exception:
            pass

    def copy(self):
        &quot;Return a distinct copy of the current font&quot;
        return Font(self._tk, **self.actual())

    def actual(self, option=None, displayof=None):
        &quot;Return actual font attributes&quot;
        args = ()
        if displayof:
            args = ('-displayof', displayof)
        if option:
            args = args + ('-' + option, )
            return self._call(&quot;font&quot;, &quot;actual&quot;, self.name, *args)
        else:
            return self._mkdict(
                self._split(self._call(&quot;font&quot;, &quot;actual&quot;, self.name, *args)))

    def cget(self, option):
        &quot;Get font attribute&quot;
        return self._call(&quot;font&quot;, &quot;config&quot;, self.name, &quot;-&quot;+option)

    def config(self, **options):
        &quot;Modify font attributes&quot;
        if options:
            self._call(&quot;font&quot;, &quot;config&quot;, self.name,
                  *self._set(options))
        else:
            return self._mkdict(
                self._split(self._call(&quot;font&quot;, &quot;config&quot;, self.name)))

    configure = config

    def measure(self, text, displayof=None):
        &quot;Return text width&quot;
        args = (text,)
        if displayof:
            args = ('-displayof', displayof, text)
        return self._tk.getint(self._call(&quot;font&quot;, &quot;measure&quot;, self.name, *args))

    def metrics(self, *options, **kw):
        &quot;&quot;&quot;Return font metrics.

        For best performance, create a dummy widget
        using this font before calling this method.&quot;&quot;&quot;
        args = ()
        displayof = kw.pop('displayof', None)
        if displayof:
            args = ('-displayof', displayof)
        if options:
            args = args + self._get(options)
            return self._tk.getint(
                self._call(&quot;font&quot;, &quot;metrics&quot;, self.name, *args))
        else:
            res = self._split(self._call(&quot;font&quot;, &quot;metrics&quot;, self.name, *args))
            options = {}
            for i in range(0, len(res), 2):
                options[res[i][1:]] = self._tk.getint(res[i+1])
            return options


def families(root=None, displayof=None):
    &quot;Get font families (as a tuple)&quot;
    if root is None:
        root = tkinter._get_default_root('use font.families()')
    args = ()
    if displayof:
        args = ('-displayof', displayof)
    return root.tk.splitlist(root.tk.call(&quot;font&quot;, &quot;families&quot;, *args))


def names(root=None):
    &quot;Get names of defined fonts (as a tuple)&quot;
    if root is None:
        root = tkinter._get_default_root('use font.names()')
    return root.tk.splitlist(root.tk.call(&quot;font&quot;, &quot;names&quot;))


# --------------------------------------------------------------------
# test stuff

if __name__ == &quot;__main__&quot;:

    root = tkinter.Tk()

    # create a font
    f = Font(family=&quot;times&quot;, size=30, weight=NORMAL)

    print(f.actual())
    print(f.actual(&quot;family&quot;))
    print(f.actual(&quot;weight&quot;))

    print(f.config())
    print(f.cget(&quot;family&quot;))
    print(f.cget(&quot;weight&quot;))

    print(names())

    print(f.measure(&quot;hello&quot;), f.metrics(&quot;linespace&quot;))

    print(f.metrics(displayof=root))

    f = Font(font=(&quot;Courier&quot;, 20, &quot;bold&quot;))
    print(f.measure(&quot;hello&quot;), f.metrics(&quot;linespace&quot;, displayof=root))

    w = tkinter.Label(root, text=&quot;Hello, world&quot;, font=f)
    w.pack()

    w = tkinter.Button(root, text=&quot;Quit!&quot;, command=root.destroy)
    w.pack()

    fb = Font(font=w[&quot;font&quot;]).copy()
    fb.config(weight=BOLD)

    w.config(font=fb)

    tkinter.mainloop()
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