[X11] Prevent IME activation from entering infinite loop.

platform/linuxbsd/x11/display_server_x11.cpp

@@ -2496,6 +2496,9 @@ void DisplayServerX11::window_set_ime_active(const bool p_active, WindowID p_win
 		return;
 	}
 	if (!wd.focused) {
+		wd.ime_active = false;
+		im_text = String();
+		im_selection = Vector2i();
 		return;
 	}
 
@@ -2524,7 +2527,6 @@ void DisplayServerX11::window_set_ime_active(const bool p_active, WindowID p_win
 		im_text = String();
 		im_selection = Vector2i();
 	}
-	OS_Unix::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_OS_IME_UPDATE);
 }
 
 void DisplayServerX11::window_set_ime_position(const Point2i &p_pos, WindowID p_window) {
@@ -3316,42 +3318,43 @@ void DisplayServerX11::_xim_preedit_draw_callback(::XIM xim, ::XPointer client_d
 	WindowData &wd = ds->windows[window_id];
 
 	XIMText *xim_text = call_data->text;
-	if (xim_text != nullptr) {
-		String changed_text;
-		if (xim_text->encoding_is_wchar) {
-			changed_text = String(xim_text->string.wide_char);
-		} else {
-			changed_text.parse_utf8(xim_text->string.multi_byte);
-		}
+	if (wd.ime_active) {
+		if (xim_text != nullptr) {
+			String changed_text;
+			if (xim_text->encoding_is_wchar) {
+				changed_text = String(xim_text->string.wide_char);
+			} else {
+				changed_text.parse_utf8(xim_text->string.multi_byte);
+			}
 
-		if (call_data->chg_length < 0) {
-			ds->im_text = ds->im_text.substr(0, call_data->chg_first) + changed_text;
-		} else {
-			ds->im_text = ds->im_text.substr(0, call_data->chg_first) + changed_text + ds->im_text.substr(call_data->chg_length);
-		}
+			if (call_data->chg_length < 0) {
+				ds->im_text = ds->im_text.substr(0, call_data->chg_first) + changed_text;
+			} else {
+				ds->im_text = ds->im_text.substr(0, call_data->chg_first) + changed_text + ds->im_text.substr(call_data->chg_length);
+			}
 
-		// Find the start and end of the selection.
-		int start = 0, count = 0;
-		for (int i = 0; i < xim_text->length; i++) {
-			if (xim_text->feedback[i] & XIMReverse) {
-				if (count == 0) {
-					start = i;
-					count = 1;
-				} else {
-					count++;
+			// Find the start and end of the selection.
+			int start = 0, count = 0;
+			for (int i = 0; i < xim_text->length; i++) {
+				if (xim_text->feedback[i] & XIMReverse) {
+					if (count == 0) {
+						start = i;
+						count = 1;
+					} else {
+						count++;
+					}
 				}
 			}
-		}
-		if (count > 0) {
-			ds->im_selection = Point2i(start + call_data->chg_first, count);
+			if (count > 0) {
+				ds->im_selection = Point2i(start + call_data->chg_first, count);
+			} else {
+				ds->im_selection = Point2i(call_data->caret, 0);
+			}
 		} else {
-			ds->im_selection = Point2i(call_data->caret, 0);
+			ds->im_text = String();
+			ds->im_selection = Point2i();
 		}
-	} else {
-		ds->im_text = String();
-		ds->im_selection = Point2i();
-	}
-	if (wd.ime_active) {
+
 		OS_Unix::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_OS_IME_UPDATE);
 	}
 }