matplotlib · QuLogic · Apr 30, 2020 · Apr 16, 2020
diff --git a/doc/api/api_changes_3.3/deprecations.rst b/doc/api/api_changes_3.3/deprecations.rst
@@ -388,6 +388,12 @@ instead.
 The unused ``animation.html_args`` rcParam and ``animation.HTMLWriter.args_key``
 attribute are deprecated.
 
+``text.latex.preview`` rcParam
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+This rcParam, which controlled the use of the preview.sty LaTeX package to
+align TeX string baselines, is deprecated, as Matplotlib's own dvi parser now
+computes baselines just as well as preview.sty.
+
 ``SubplotSpec.get_rows_columns``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 This method is deprecated.  Use the ``GridSpec.nrows``, ``GridSpec.ncols``,

diff --git a/examples/text_labels_and_annotations/usetex_baseline_test.py b/examples/text_labels_and_annotations/usetex_baseline_test.py
@@ -3,6 +3,11 @@
 Usetex Baseline Test
 ====================
 
+A test for :rc:`text.latex.preview`, a deprecated feature which relied
+on the preview.sty LaTeX package to properly align TeX baselines.  This
+feature has been deprecated as Matplotlib's dvi parser now computes baselines
+just as well as preview.sty; this example will be removed together with
+:rc:`text.latex.preview` after the deprecation elapses.
 """
 
 import matplotlib.pyplot as plt

diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -624,6 +624,7 @@ def gen_candidates():
     'mathtext.fallback_to_cm': ('3.3',),
     'keymap.all_axes': ('3.3',),
     'savefig.jpeg_quality': ('3.3',),
+    'text.latex.preview': ('3.3',),
 }
 
 

diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
@@ -477,7 +477,7 @@ def draw_tex(self, gc, x, y, s, prop, angle, ismath='TeX!', mtext=None):
         tex = r'\color[rgb]{%s} %s' % (color, s)
 
         corr = 0  # w/2*(fontsize-10)/10
-        if mpl.rcParams['text.latex.preview']:
+        if dict.__getitem__(mpl.rcParams, 'text.latex.preview'):
             # use baseline alignment!
             pos = _nums_to_str(x-corr, y)
             self.psfrag.append(

diff --git a/lib/matplotlib/dviread.py b/lib/matplotlib/dviread.py
@@ -214,7 +214,7 @@ def __init__(self, filename, dpi):
         self.baseline = self._get_baseline(filename)
 
     def _get_baseline(self, filename):
-        if rcParams['text.latex.preview']:
+        if dict.__getitem__(rcParams, 'text.latex.preview'):
             baseline = Path(filename).with_suffix(".baseline")
             if baseline.exists():
                 height, depth, width = baseline.read_bytes().split()

diff --git a/lib/matplotlib/mpl-data/stylelib/classic.mplstyle b/lib/matplotlib/mpl-data/stylelib/classic.mplstyle
@@ -122,7 +122,6 @@ text.latex.preamble :  # IMPROPER USE OF THIS FEATURE WILL LEAD TO LATEX FAILURE
                            # beware of package collisions: color, geometry, graphicx,
                            # type1cm, textcomp. Adobe Postscript (PSSNFS) font packages
                            # may also be loaded, depending on your font settings
-text.latex.preview : False
 
 text.hinting : auto   # May be one of the following:
                       #   'none': Perform no hinting

diff --git a/lib/matplotlib/texmanager.py b/lib/matplotlib/texmanager.py
@@ -219,6 +219,7 @@ def make_tex(self, tex, fontsize):
     _re_vbox = re.compile(
         r"MatplotlibBox:\(([\d.]+)pt\+([\d.]+)pt\)x([\d.]+)pt")
 
+    @cbook.deprecated("3.3")
     def make_tex_preview(self, tex, fontsize):
         """
         Generate a tex file to render the tex string at a specific font size.
@@ -286,7 +287,7 @@ def make_dvi(self, tex, fontsize):
         Return the file name.
         """
 
-        if rcParams['text.latex.preview']:
+        if dict.__getitem__(rcParams, 'text.latex.preview'):
             return self.make_dvi_preview(tex, fontsize)
 
         basefile = self.get_basefile(tex, fontsize)
@@ -306,6 +307,7 @@ def make_dvi(self, tex, fontsize):
 
         return dvifile
 
+    @cbook.deprecated("3.3")
     def make_dvi_preview(self, tex, fontsize):
         """
         Generate a dvi file containing latex's layout of tex string.
@@ -397,7 +399,7 @@ def get_text_width_height_descent(self, tex, fontsize, renderer=None):
 
         dpi_fraction = renderer.points_to_pixels(1.) if renderer else 1
 
-        if rcParams['text.latex.preview']:
+        if dict.__getitem__(rcParams, 'text.latex.preview'):
             # use preview.sty
             basefile = self.get_basefile(tex, fontsize)
             baselinefile = '%s.baseline' % basefile

diff --git a/matplotlibrc.template b/matplotlibrc.template
@@ -291,7 +291,6 @@
                         # type1cm, textcomp.
                         # Adobe Postscript (PSSNFS) font packages may also be
                         # loaded, depending on your font settings.
-#text.latex.preview: False
 
 #text.hinting: auto  # May be one of the following:
                      #     - none: Perform no hinting