Make underline cursor thickness configurable

docs/changelog.rst

@@ -19,6 +19,9 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 - A new :opt:`cursor_beam_thickness` option to control the thickness of the
   beam cursor (:iss:`2337`)
 
+- A new :opt:`cursor_underline_thickness` option to control the thickness of the
+  underline cursor
+
 
 
 0.16.0 [2020-01-28]

kitty/config_data.py

@@ -396,6 +396,8 @@ o('cursor_shape', 'block', option_type=to_cursor_shape, long_text=_(
     'The cursor shape can be one of (block, beam, underline)'))
 o('cursor_beam_thickness', 1.5, option_type=positive_float, long_text=_(
     'Defines the thickness of the beam cursor (in pts)'))
+o('cursor_underline_thickness', 2.0, option_type=positive_float, long_text=_(
+    'Defines the thickness of the underline cursor (in pts)'))
 o('cursor_blink_interval', -1, option_type=float, long_text=_('''
 The interval (in seconds) at which to blink the cursor. Set to zero to disable
 blinking. Negative values mean use system default. Note that numbers smaller

kitty/fonts.c

@@ -1232,7 +1232,7 @@ send_prerendered_sprites(FontGroup *fg) {
     current_send_sprite_to_gpu((FONTS_DATA_HANDLE)fg, x, y, z, fg->canvas);
     do_increment(fg, &error);
     if (error != 0) { sprite_map_set_error(error); PyErr_Print(); fatal("Failed"); }
-    PyObject *args = PyObject_CallFunction(prerender_function, "IIIIIfdd", fg->cell_width, fg->cell_height, fg->baseline, fg->underline_position, fg->underline_thickness, OPT(cursor_beam_thickness), fg->logical_dpi_x, fg->logical_dpi_y);
+    PyObject *args = PyObject_CallFunction(prerender_function, "IIIIIffdd", fg->cell_width, fg->cell_height, fg->baseline, fg->underline_position, fg->underline_thickness, OPT(cursor_beam_thickness), fg->logical_dpi_x, fg->logical_dpi_y);
     if (args == NULL) { PyErr_Print(); fatal("Failed to pre-render cells"); }
     for (ssize_t i = 0; i < PyTuple_GET_SIZE(args) - 1; i++) {
         x = fg->sprite_tracker.x; y = fg->sprite_tracker.y; z = fg->sprite_tracker.z;

kitty/fonts/render.py

@@ -192,7 +192,7 @@ def render_special(
     return ans
 
 
-def render_cursor(which, cursor_beam_thickness, cell_width=0, cell_height=0, dpi_x=0, dpi_y=0):
+def render_cursor(which, cursor_beam_thickness, cursor_underline_thickness, cell_width=0, cell_height=0, dpi_x=0, dpi_y=0):
     CharTexture = ctypes.c_ubyte * (cell_width * cell_height)
     ans = CharTexture()
 
@@ -215,19 +215,21 @@ def render_cursor(which, cursor_beam_thickness, cell_width=0, cell_height=0, dpi
     if which == 1:  # beam
         vert('left', cursor_beam_thickness)
     elif which == 2:  # underline
-        horz('bottom', 2.0)
+        horz('bottom', cursor_underline_thickness)
     elif which == 3:  # hollow
         vert('left'), vert('right'), horz('top'), horz('bottom')
     return ans
 
 
-def prerender_function(cell_width, cell_height, baseline, underline_position, underline_thickness, cursor_beam_thickness, dpi_x, dpi_y):
+def prerender_function(cell_width, cell_height, baseline, underline_position, underline_thickness, cursor_beam_thickness, cursor_underline_thickness, dpi_x, dpi_y):
     # Pre-render the special underline, strikethrough and missing and cursor cells
     f = partial(
         render_special, cell_width=cell_width, cell_height=cell_height, baseline=baseline,
         underline_position=underline_position, underline_thickness=underline_thickness)
     c = partial(
-        render_cursor, cursor_beam_thickness=cursor_beam_thickness, cell_width=cell_width, cell_height=cell_height, dpi_x=dpi_x, dpi_y=dpi_y)
+        render_cursor, cursor_beam_thickness=cursor_beam_thickness,
+        cursor_underline_thickness=cursor_underline_thickness, cell_width=cell_width,
+        cell_height=cell_height, dpi_x=dpi_x, dpi_y=dpi_y)
     cells = f(1), f(2), f(3), f(0, True), f(missing=True), c(1), c(2), c(3)
     return tuple(map(ctypes.addressof, cells)) + (cells,)
 

kitty/state.c

@@ -569,6 +569,7 @@ PYWRAP1(set_options) {
     S(scrollback_pager_history_size, PyLong_AsUnsignedLong);
     S(cursor_shape, PyLong_AsLong);
     S(cursor_beam_thickness, PyFloat_AsFloat);
+    S(cursor_underline_thickness, PyFloat_AsFloat);
     S(url_style, PyLong_AsUnsignedLong);
     S(tab_bar_edge, PyLong_AsLong);
     S(mouse_hide_wait, parse_s_double_to_monotonic_t);

kitty/state.h

@@ -21,6 +21,7 @@ typedef struct {
     bool enable_audio_bell;
     CursorShape cursor_shape;
     float cursor_beam_thickness;
+    float cursor_underline_thickness;
     unsigned int open_url_modifiers;
     unsigned int rectangle_select_modifiers;
     unsigned int terminal_select_modifiers;