Fix hyperlink id not being applied to wide cells

Fixes #8796

docs/changelog.rst

@@ -132,6 +132,8 @@ Detailed list of changes
 
 - Fix a regression in 0.40.0 that broke erasing of characters in a line in the presence of wide characters (:iss:`8758`)
 
+- Fix a regression in 0.40.0 that broke hyperlinking of wide characters (:iss:`8796`)
+
 - Fix a regression that broke using :kbd:`esc` to exit visual select window mode (:iss:`8767`)
 
 - kitten run-shell: Fix SIGINT blocked when execing the shell (:iss:`8754`)

kitty/screen.c

@@ -1174,7 +1174,7 @@ draw_text_loop(Screen *self, const uint32_t *chars, size_t num_chars, text_loop_
                 } else nuke_multicell_char_at(self, self->cursor->x + 1, self->cursor->y, true);
             }
             zero_cells(s, fc, s->gp + self->cursor->x);
-            *fc = (CPUCell){.ch_or_idx=ch, .is_multicell=true, .width=2, .scale=1, .natural_width=true};
+            *fc = (CPUCell){.ch_or_idx=ch, .is_multicell=true, .width=2, .scale=1, .natural_width=true, .hyperlink_id=s->cc.hyperlink_id};
             *second = *fc; second->x = 1;
             s->gp[self->cursor->x + 1] = s->gp[self->cursor->x];
             s->prev.y = self->cursor->y; s->prev.x = self->cursor->x; s->prev.cc = fc;

kitty_tests/screen.py

@@ -947,6 +947,13 @@ def test_hyperlinks(self):
         def set_link(url=None, id=None):
             parse_bytes(s, '\x1b]8;id={};{}\x1b\\'.format(id or '', url or '').encode('utf-8'))
 
+        set_link('wide-chars', 'XX')
+        self.ae(s.line(0).hyperlink_ids(), tuple(0 for x in range(s.columns)))
+        s.draw('状')
+        self.ae(s.line(0).hyperlink_ids(), (1, 1) + tuple(0 for x in range(s.columns - 2)))
+        set_link()
+
+        s = self.create_screen()
         set_link('url-a', 'a')
         self.ae(s.line(0).hyperlink_ids(), tuple(0 for x in range(s.columns)))
         s.draw('a')