Method sqrt

lib/matplotlib/_mathtext.py:2891–2930

(self, toks: ParseResults)

    overset = underset = _genset

    def sqrt(self, toks: ParseResults) -> T.Any:
        root = toks.get("root")
        body = toks["value"]
        state = self.get_state()
        thickness = state.get_current_underline_thickness()

        # Determine the height of the body, and add a little extra to
        # the height so it doesn't seem cramped
        height = body.height - body.shift_amount + 5 * thickness
        depth = body.depth + body.shift_amount
        check = AutoHeightChar(r'\__sqrt__', height, depth, state)
        height = check.height - check.shift_amount
        depth = check.depth + check.shift_amount

        # Put a little extra space to the left and right of the body
        padded_body = Hlist([Hbox(2 * thickness), body, Hbox(2 * thickness)])
        rightside = Vlist([Hrule(state), Glue('fill'), padded_body])
        # Stretch the glue between the hrule and the body
        rightside.vpack(height + (state.fontsize * state.dpi) / (100 * 12),
                        'exactly', depth)

        # Add the root and shift it upward so it is above the tick.
        # The value of 0.6 is a hard-coded hack ;)
        if not root:
            root = Box(0.5 * check.width, 0., 0.)
        else:
            root = Hlist(root)
            root.shrink()
            root.shrink()

        root_vlist = Vlist([Hlist([root])])
        root_vlist.shift_amount = -height * 0.6

        hlist = Hlist([
            root_vlist,                # Root
            Kern(-0.5 * check.width),  # Negative kerning to put root over tick
            check,                     # Check
            rightside,                 # Body
        ])
        return [hlist]

    def overline(self, toks: ParseResults) -> T.Any:
        body = toks["body"]