matplotlib · QuLogic · Jan 7, 2022 · Jan 5, 2022 · Jan 6, 2022
diff --git a/doc/api/mathtext_api.rst b/doc/api/mathtext_api.rst
@@ -9,4 +9,3 @@
    :members:
    :undoc-members:
    :show-inheritance:
-   :exclude-members: Box, Char, ComputerModernFontConstants, DejaVuSansFontConstants, DejaVuSerifFontConstants, FontConstantsBase, Fonts, Glue, Kern, Node, Parser, STIXFontConstants, STIXSansFontConstants, Ship, StandardPsFonts, TruetypeFonts
diff --git a/doc/api/next_api_changes/removals/22107-OG.rst b/doc/api/next_api_changes/removals/22107-OG.rst
@@ -0,0 +1,40 @@
+Removal of deprecated ``mathtext`` APIs
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The following `matplotlib.mathtext` APIs have been removed:
+- ``Fonts`` and all its subclasses,
+- ``FontConstantsBase`` and all its subclasses,
+- ``Node`` and all its subclasses,
+- ``Ship``, ``ship``,
+- ``Error``,
+- ``Parser``,
+- ``SHRINK_FACTOR``, ``GROW_FACTOR``,
+- ``NUM_SIZE_LEVELS``,
+- ``latex_to_bakoma``, ``latex_to_cmex``, ``latex_to_standard``,
+- ``stix_virtual_fonts``,
+- ``tex2uni``
+
+Removal of various ``mathtext`` helpers
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The following `matplotlib.mathtext` classes:
+- ``MathtextBackendPdf``,
+- ``MathtextBackendPs``,
+- ``MathtextBackendSvg``,
+- ``MathtextBackendCairo``,
+and the ``.mathtext_parser`` attributes on
+- `.RendererPdf`,
+- `.RendererPS`,
+- `.RendererSVG`,
+- `.RendererCairo`
+have been removed. The `.MathtextBackendPath` class can be used instead.
+
+The methods ``get_depth``, ``parse``, ``to_mask``, ``to_rgba``, and ``to_png``
+of `.MathTextParser` have been removed. Use `.mathtext.math_to_image` instead.
+
+The unused ``StandardPsFonts.pswriter`` has been removed.
+
+``ps.useafm`` removed for ``mathtext``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The setting :rc:`ps.useafm` no longer has any effect on `matplotlib.mathtext`.
diff --git a/doc/sphinxext/math_symbol_table.py b/doc/sphinxext/math_symbol_table.py
@@ -1,6 +1,6 @@
 from docutils.parsers.rst import Directive
 
-from matplotlib import mathtext
+from matplotlib import _mathtext, _mathtext_data
 
 
 symbols = [
@@ -103,9 +103,9 @@ def run(state_machine):
     def render_symbol(sym):
         if sym.startswith("\\"):
             sym = sym[1:]
-            if sym not in {*mathtext.Parser._overunder_functions,
-                           *mathtext.Parser._function_names}:
-                sym = chr(mathtext.tex2uni[sym])
+            if sym not in (_mathtext.Parser._overunder_functions |
+                           _mathtext.Parser._function_names):
+                sym = chr(_mathtext_data.tex2uni[sym])
         return f'\\{sym}' if sym in ('\\', '|') else sym
 
     lines = []
@@ -149,7 +149,6 @@ def setup(app):
 
 if __name__ == "__main__":
     # Do some verification of the tables
-    from matplotlib import _mathtext_data
 
     print("SYMBOLS NOT IN STIX:")
     all_symbols = {}

diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -5,7 +5,6 @@
 from collections import namedtuple
 import enum
 import functools
-from io import StringIO
 import logging
 import os
 import types
@@ -92,14 +91,6 @@ def __init__(self, default_font_prop, mathtext_backend):
         self.mathtext_backend = mathtext_backend
         self.used_characters = {}
 
-    @_api.deprecated("3.4")
-    def destroy(self):
-        """
-        Fix any cyclical references before the object is about
-        to be destroyed.
-        """
-        self.used_characters = None
-
     def get_kern(self, font1, fontclass1, sym1, fontsize1,
                  font2, fontclass2, sym2, fontsize2, dpi):
         """
@@ -203,11 +194,6 @@ def get_results(self, box):
         """
         result = self.mathtext_backend.get_results(
             box, self.get_used_characters())
-        if self.destroy != TruetypeFonts.destroy.__get__(self):
-            destroy = _api.deprecate_method_override(
-                __class__.destroy, self, since="3.4")
-            if destroy:
-                destroy()
         return result
 
     def get_sized_alternatives_for_symbol(self, fontname, sym):
@@ -235,11 +221,6 @@ def __init__(self, default_font_prop, mathtext_backend):
         self._fonts['default'] = default_font
         self._fonts['regular'] = default_font
 
-    @_api.deprecated("3.4")
-    def destroy(self):
-        self.glyphd = None
-        super().destroy()
-
     def _get_font(self, font):
         if font in self.fontmap:
             basename = self.fontmap[font]
@@ -803,8 +784,6 @@ def __init__(self, default_font_prop, mathtext_backend=None):
         self.fonts['default'] = default_font
         self.fonts['regular'] = default_font
 
-    pswriter = _api.deprecated("3.4")(property(lambda self: StringIO()))
-
     def _get_font(self, font):
         if font in self.fontmap:
             basename = self.fontmap[font]

diff --git a/lib/matplotlib/backends/_backend_pdf_ps.py b/lib/matplotlib/backends/_backend_pdf_ps.py
@@ -104,12 +104,7 @@ def get_text_width_height_descent(self, s, prop, ismath):
                 s, fontsize, renderer=self)
             return w, h, d
         elif ismath:
-            # Circular import.
-            from matplotlib.backends.backend_ps import RendererPS
-            parse = self._text2path.mathtext_parser.parse(
-                s, 72, prop,
-                _force_standard_ps_fonts=(isinstance(self, RendererPS)
-                                          and mpl.rcParams["ps.useafm"]))
+            parse = self._text2path.mathtext_parser.parse(s, 72, prop)
             return parse.width, parse.height, parse.depth
         elif mpl.rcParams[self._use_afm_rc_name]:
             font = self._get_font_afm(prop)

diff --git a/lib/matplotlib/backends/backend_cairo.py b/lib/matplotlib/backends/backend_cairo.py
@@ -31,7 +31,6 @@
     _Backend, FigureCanvasBase, FigureManagerBase, GraphicsContextBase,
     RendererBase)
 from matplotlib.font_manager import ttfFontProperty
-from matplotlib.mathtext import MathTextParser
 from matplotlib.path import Path
 from matplotlib.transforms import Affine2D
 
@@ -123,9 +122,6 @@ def attr(field):
 
 
 class RendererCairo(RendererBase):
-    mathtext_parser = _api.deprecated("3.4")(
-        property(lambda self: MathTextParser('Cairo')))
-
     def __init__(self, dpi):
         self.dpi = dpi
         self.gc = GraphicsContextCairo(renderer=self)

diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
@@ -39,7 +39,6 @@
 import matplotlib.dviread as dviread
 from matplotlib.ft2font import (FIXED_WIDTH, ITALIC, LOAD_NO_SCALE,
                                 LOAD_NO_HINTING, KERNING_UNFITTED, FT2Font)
-from matplotlib.mathtext import MathTextParser
 from matplotlib.transforms import Affine2D, BboxBase
 from matplotlib.path import Path
 from matplotlib.dates import UTC
@@ -1900,11 +1899,6 @@ def __init__(self, file, image_dpi, height, width):
         self.gc = self.new_gc()
         self.image_dpi = image_dpi
 
-    @_api.deprecated("3.4")
-    @property
-    def mathtext_parser(self):
-        return MathTextParser("Pdf")
-
     def finalize(self):
         self.file.output(*self.gc.finalize())
 

diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
@@ -7,12 +7,11 @@
 from enum import Enum
 import functools
 import glob
-from io import StringIO, TextIOWrapper
+from io import StringIO
 import logging
 import math
 import os
 import pathlib
-import tempfile
 import re
 import shutil
 from tempfile import TemporaryDirectory
@@ -30,7 +29,6 @@
 from matplotlib.font_manager import get_font
 from matplotlib.ft2font import LOAD_NO_HINTING, LOAD_NO_SCALE, FT2Font
 from matplotlib._ttconv import convert_ttf_to_ps
-from matplotlib.mathtext import MathTextParser
 from matplotlib._mathtext_data import uni2type1
 from matplotlib.path import Path
 from matplotlib.texmanager import TexManager
@@ -263,9 +261,6 @@ class RendererPS(_backend_pdf_ps.RendererPDFPSBase):
     _afm_font_dir = cbook._get_data_path("fonts/afm")
     _use_afm_rc_name = "ps.useafm"
 
-    mathtext_parser = _api.deprecated("3.4")(property(
-        lambda self: MathTextParser("PS")))
-
     def __init__(self, width, height, pswriter, imagedpi=72):
         # Although postscript itself is dpi independent, we need to inform the
         # image code about a requested dpi to generate high resolution images
@@ -689,9 +684,7 @@ def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
     def draw_mathtext(self, gc, x, y, s, prop, angle):
         """Draw the math text using matplotlib.mathtext."""
         width, height, descent, glyphs, rects = \
-            self._text2path.mathtext_parser.parse(
-                s, 72, prop,
-                _force_standard_ps_fonts=mpl.rcParams["ps.useafm"])
+            self._text2path.mathtext_parser.parse(s, 72, prop)
         self.set_color(*gc.get_rgb())
         self._pswriter.write(
             f"gsave\n"

diff --git a/lib/matplotlib/backends/backend_svg.py b/lib/matplotlib/backends/backend_svg.py
@@ -20,7 +20,6 @@
 from matplotlib.backends.backend_mixed import MixedModeRenderer
 from matplotlib.colors import rgb2hex
 from matplotlib.dates import UTC
-from matplotlib.mathtext import MathTextParser
 from matplotlib.path import Path
 from matplotlib import _path
 from matplotlib.transforms import Affine2D, Affine2DBase
@@ -318,11 +317,6 @@ def __init__(self, width, height, svgwriter, basename=None, image_dpi=72,
         self._write_metadata(metadata)
         self._write_default_style()
 
-    @_api.deprecated("3.4")
-    @property
-    def mathtext_parser(self):
-        return MathTextParser('SVG')
-
     def finalize(self):
         self._write_clips()
         self._write_hatches()