neovim

commit a56dc7a7f6f4cae9461921cf9253152a40cd7619
parent f3039ce531f49a63f8fd07317c1f957fb28fc6a7
Author: Paul "LeoNerd" Evans <leonerd@leonerd.org.uk>
Date:   Wed, 18 Jan 2023 18:19:21 +0000

feat(tui): support altfont mode in tui.c

Diffstat:
M
src/nvim/tui/tui.c
 | 
11
+++++++++++

1 file changed, 11 insertions(+), 0 deletions(-)
diff --git a/src/nvim/tui/tui.c b/src/nvim/tui/tui.c
@@ -137,6 +137,7 @@ struct TUIData {
     int enable_bracketed_paste, disable_bracketed_paste;
     int enable_lr_margin, disable_lr_margin;
     int enter_strikethrough_mode;
+    int enter_altfont_mode;
     int set_rgb_foreground, set_rgb_background;
     int set_cursor_color;
     int reset_cursor_color;
@@ -251,6 +252,7 @@ static void terminfo_start(TUIData *tui)
   tui->unibi_ext.enable_bracketed_paste = -1;
   tui->unibi_ext.disable_bracketed_paste = -1;
   tui->unibi_ext.enter_strikethrough_mode = -1;
+  tui->unibi_ext.enter_altfont_mode = -1;
   tui->unibi_ext.enable_lr_margin = -1;
   tui->unibi_ext.disable_lr_margin = -1;
   tui->unibi_ext.enable_focus_reporting = -1;
@@ -531,6 +533,7 @@ static void update_attrs(TUIData *tui, int attr_id)
   bool reverse = attr & HL_INVERSE;
   bool standout = attr & HL_STANDOUT;
   bool strikethrough = attr & HL_STRIKETHROUGH;
+  bool altfont = attr & HL_ALTFONT;
 
   bool underline;
   bool undercurl;
@@ -590,6 +593,9 @@ static void update_attrs(TUIData *tui, int attr_id)
   if (italic) {
     unibi_out(tui, unibi_enter_italics_mode);
   }
+  if (altfont && tui->unibi_ext.enter_altfont_mode != -1) {
+    unibi_out_ext(tui, tui->unibi_ext.enter_altfont_mode);
+  }
   if (strikethrough && tui->unibi_ext.enter_strikethrough_mode != -1) {
     unibi_out_ext(tui, tui->unibi_ext.enter_strikethrough_mode);
   }
@@ -2038,6 +2044,11 @@ static void augment_terminfo(TUIData *tui, const char *term, long vte_version, l
   // to the ECMA-48 strikeout/crossed-out attributes.
   tui->unibi_ext.enter_strikethrough_mode = unibi_find_ext_str(ut, "smxx");
 
+  // It should be pretty safe to always enable this, as terminals will ignore
+  // unrecognised SGR numbers.
+  tui->unibi_ext.enter_altfont_mode = (int)unibi_add_ext_str(ut, "ext.enter_altfont_mode",
+                                                             "\x1b[11m");
+
   // Dickey ncurses terminfo does not include the setrgbf and setrgbb
   // capabilities, proposed by Rüdiger Sonderfeld on 2013-10-15.  Adding
   // them here when terminfo lacks them is an augmentation, not a fixup.