url-mode: disable IME mode while URL-mode is active

This prevents the IME from stealing "our" key-presses, and thus
preventing the user from opening URLs.

Closes #1718, hopefully.

CHANGELOG.md

@@ -87,9 +87,11 @@
 * No error response for empty `XTGETTCAP` request ([#1694][1694]).
 * Unicode-mode in one foot client affecting other clients, in foot
   server mode ([#1717][1717]).
+* IME interfering in URL-mode ([#1718][1718]).
 
 [1694]: https://codeberg.org/dnkl/foot/issues/1694
 [1717]: https://codeberg.org/dnkl/foot/issues/1717
+[1718]: https://codeberg.org/dnkl/foot/issues/1718
 
 
 ### Security

csi.c

@@ -507,8 +507,10 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
     case 737769:
         if (enable)
             term_ime_enable(term);
-        else
+        else {
             term_ime_disable(term);
+            term->ime_reenable_after_url_mode = false;
+        }
         break;
 
     default:

terminal.h

@@ -714,6 +714,7 @@ struct terminal {
     char32_t url_keys[5];
     bool urls_show_uri_on_jump_label;
     struct grid *url_grid_snapshot;
+    bool ime_reenable_after_url_mode;
 
 #if defined(FOOT_IME_ENABLED) && FOOT_IME_ENABLED
     bool ime_enabled;

url-mode.c

@@ -778,6 +778,12 @@ urls_render(struct terminal *term)
     if (tll_length(win->term->urls) == 0)
         return;
 
+    /* Disable IME while in URL-mode */
+    if (term_ime_is_enabled(term)) {
+        term->ime_reenable_after_url_mode = true;
+        term_ime_disable(term);
+    }
+
     /* Dirty the last cursor, to ensure it is erased */
     {
         struct row *cursor_row = term->render.last_cursor.row;
@@ -861,5 +867,11 @@ urls_reset(struct terminal *term)
     term->urls_show_uri_on_jump_label = false;
     memset(term->url_keys, 0, sizeof(term->url_keys));
 
+    /* Re-enable IME, if it was enabled before we entered URL-mode */
+    if (term->ime_reenable_after_url_mode) {
+        term->ime_reenable_after_url_mode = false;
+        term_ime_enable(term);
+    }
+
     render_refresh(term);
 }