Allow setting bold/italic font variants individually

kitty/config.py

@@ -105,7 +105,6 @@ type_map = {
     'window_border_width': float,
     'wheel_scroll_multiplier': float,
     'click_interval': float,
-    'select_by_word_characters': str,
     'mouse_hide_wait': float,
     'cursor_blink_interval': float,
     'cursor_stop_blinking_after': float,

kitty/fonts/core_text.py

@@ -19,12 +19,19 @@ def set_font_family(opts, ignore_dpi_failure=False):
             raise
         dpi = (72, 72)  # Happens when running via develop() in an ssh session
     dpi = sum(dpi) / 2.0
-    family = opts.font_family
-    if family.lower() == 'monospace':
-        family = 'Menlo'
+    attr_map = {(False, False): 'font_family', (True, False): 'bold_font', (False, True): 'italic_font', (True, True): 'bold_italic_font'}
+
+    def get_family(bold, italic):
+        ans = getattr(opts, attr_map[(bold, italic)])
+        if ans.lower() == 'monospace':
+            ans = 'Menlo'
+        if ans == 'auto' and (bold or italic):
+            ans = get_family(False, False)
+        return ans
+
     for bold in (False, True):
         for italic in (False, True):
-            main_font[(bold, italic)] = Face(family, bold, italic, True, opts.font_size, dpi)
+            main_font[(bold, italic)] = Face(get_family(bold, italic), bold, italic, True, opts.font_size, dpi)
     mf = main_font[(False, False)]
     cell_width, cell_height = mf.cell_size()
     CellTexture = ctypes.c_ubyte * (cell_width * cell_height)

kitty/fonts/fontconfig.py

@@ -50,13 +50,21 @@ def get_font_information(q, bold=False, italic=False):
     return get_font(q, bold, italic)
 
 
-def get_font_files(family):
+def get_font_files(opts):
     ans = {}
-    n = get_font_information(family)
+    attr_map = {'bold': 'bold_font', 'italic': 'italic_font', 'bi': 'bold_italic_font'}
+
+    def get_family(key=None):
+        ans = getattr(opts, attr_map.get(key, 'font_family'))
+        if ans == 'auto' and key:
+            ans = get_family()
+        return ans
+
+    n = get_font_information(get_family())
     ans['regular'] = Font(Face(n.face), n.hinting, n.hintstyle, n.bold, n.italic)
 
     def do(key):
-        b = get_font_information(family, bold=key in ('bold', 'bi'), italic=key in ('italic', 'bi'))
+        b = get_font_information(get_family(key), bold=key in ('bold', 'bi'), italic=key in ('italic', 'bi'))
         if b.face != n.face:
             ans[key] = Font(Face(b.face), b.hinting, b.hintstyle, b.bold, b.italic)
     do('bold'), do('italic'), do('bi')

kitty/fonts/freetype.py

@@ -51,24 +51,23 @@ def set_font_family(opts):
     global current_font_family, current_font_family_name, cff_size, cell_width, cell_height, CharTexture, baseline
     global underline_position, underline_thickness
     size_in_pts = opts.font_size
-    if current_font_family_name != opts.font_family or cff_size != size_in_pts:
-        find_font_for_character.cache_clear()
-        current_font_family = get_font_files(opts.font_family)
-        current_font_family_name = opts.font_family
-        dpi = get_logical_dpi()
-        cff_size = ceil_int(64 * size_in_pts)
-        cff_size = {'width': cff_size, 'height': cff_size, 'hres': int(dpi[0]), 'vres': int(dpi[1])}
-        for fobj in current_font_family.values():
-            set_char_size(fobj.face, **cff_size)
-        face = current_font_family['regular'].face
-        cell_width = calc_cell_width(current_font_family['regular'], face)
-        cell_height = font_units_to_pixels(face.height, face.units_per_EM, size_in_pts, dpi[1])
-        baseline = font_units_to_pixels(face.ascender, face.units_per_EM, size_in_pts, dpi[1])
-        underline_position = min(baseline - font_units_to_pixels(face.underline_position, face.units_per_EM, size_in_pts, dpi[1]), cell_height - 1)
-        underline_thickness = font_units_to_pixels(face.underline_thickness, face.units_per_EM, size_in_pts, dpi[1])
-        CharTexture = ctypes.c_ubyte * (cell_width * cell_height)
-        font_for_char.cache_clear()
-        alt_face_cache.clear()
+    find_font_for_character.cache_clear()
+    current_font_family = get_font_files(opts)
+    current_font_family_name = opts.font_family
+    dpi = get_logical_dpi()
+    cff_size = ceil_int(64 * size_in_pts)
+    cff_size = {'width': cff_size, 'height': cff_size, 'hres': int(dpi[0]), 'vres': int(dpi[1])}
+    for fobj in current_font_family.values():
+        set_char_size(fobj.face, **cff_size)
+    face = current_font_family['regular'].face
+    cell_width = calc_cell_width(current_font_family['regular'], face)
+    cell_height = font_units_to_pixels(face.height, face.units_per_EM, size_in_pts, dpi[1])
+    baseline = font_units_to_pixels(face.ascender, face.units_per_EM, size_in_pts, dpi[1])
+    underline_position = min(baseline - font_units_to_pixels(face.underline_position, face.units_per_EM, size_in_pts, dpi[1]), cell_height - 1)
+    underline_thickness = font_units_to_pixels(face.underline_thickness, face.units_per_EM, size_in_pts, dpi[1])
+    CharTexture = ctypes.c_ubyte * (cell_width * cell_height)
+    font_for_char.cache_clear()
+    alt_face_cache.clear()
     return cell_width, cell_height
 
 

kitty/kitty.conf

@@ -1,7 +1,16 @@
 # vim:fileencoding=utf-8:ft=conf
 
-# Font family
+# Font family. You can also specify different fonts for the
+# bold/italic/bold-italic variants. By default they are derived automatically,
+# by the OSes font system. Setting them manually is useful for font families
+# that have many weight variants like Book, Medium, Thick, etc. For example:
+# font_family Operator Mono Book
+# bold_font Operator Mono Thick
+# bold_talic_font Operator Mono Medium
 font_family      monospace
+italic_font      auto
+bold_font        auto
+bold_italic_font auto
 
 # Font size (in pts)
 font_size        11.0