Add boldsymbol functionality in mathtext

devRD · devRD · commit 59cb0269d1fa · 2023-06-12T19:09:08.000+05:30
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -2607,12 +2607,11 @@ def auto_delim(self, s, loc, toks):
     def boldsymbol(self, s, loc, toks):
         self.push_state()
         state = self.get_state()
-        state.font = 'bfit'
         hlist = []
         name = toks["value"]
         for c in name:
             if isinstance(c, Char):
-                c.font = 'bfit'
+                c.font = "bsym"
                 c._update_metrics()
                 hlist.append(c)
             else:
diff --git a/lib/matplotlib/_mathtext_data.py b/lib/matplotlib/_mathtext_data.py
@@ -1270,6 +1270,15 @@
         (0x0041, 0x005a, 'rm', 0x1d670), # A-Z
         (0x0061, 0x007a, 'rm', 0x1d68a)  # a-z
         ],
+    'bsym':
+        [
+        (0x0030, 0x0039, 'bf', 0x1d7ec), # 0-9
+        (0x0041, 0x005a, 'bfit', 0x1d63c), # A-Z
+        (0x0061, 0x007a, 'bfit', 0x1d656), # a-z
+        (0x0393, 0x03a9, 'bf', 0x1d758), # \Gamma-Omega
+        (0x2207, 0x2207, 'bf', 0x1d76f), # \Nabla
+        (0x03b1, 0x03c9, 'bf', 0x1d770), # \alpha-\omega
+        ],
     }
 
 
diff --git a/lib/matplotlib/tests/baseline_images/test_mathtext/mathtext1_dejavusans_05.png b/lib/matplotlib/tests/baseline_images/test_mathtext/mathtext1_dejavusans_05.png
diff --git a/lib/matplotlib/tests/test_mathtext.py b/lib/matplotlib/tests/test_mathtext.py
@@ -134,7 +134,7 @@
     r'$\sum x\quad\sum^nx\quad\sum_nx\quad\sum_n^nx\quad\prod x\quad\prod^nx\quad\prod_nx\quad\prod_n^nx$',  # GitHub issue 18085
     r'$1.$ $2.$ $19680801.$ $a.$ $b.$ $mpl.$',
     r'$\text{text}_{\text{sub}}^{\text{sup}} + \text{\$foo\$} + \frac{\text{num}}{\mathbf{\text{den}}}\text{with space, curly brackets \{\}, and dash -}$',
-    r'$\boldsymbol{boldsymbol} \boldsymbol{\alpha} \boldsymbol{01234} \boldsymbol{\alpha * \beta}$',
+    r'$\boldsymbol{abcde} \boldsymbol{\Gamma + \Omega} \boldsymbol{01234} \boldsymbol{\alpha * \beta}$',
 ]
 
 digits = "0123456789"
@@ -542,6 +542,5 @@ def test_mathtext_operators():
 
 @check_figures_equal(extensions=["png"])
 def test_boldsymbol(fig_test, fig_ref):
-    fig_test.text(0.1, 0.2, r"$\boldsymbol{\mathrm{abc0123\alpha}}")
-
-    fig_ref.text(0.1, 0.2, r"$\mathrm{abc0123\alpha}")
+    fig_test.text(0.1, 0.2, r"$\boldsymbol{\mathrm{abc0123\alpha}}$")
+    fig_ref.text(0.1, 0.2, r"$\mathrm{abc0123\alpha}$")
