fix(label): lv_label_mark_need_refr_text not invalidate area (#9176)

Signed-off-by: yushuailong1 <yushuailong1@xiaomi.com>

src/widgets/label/lv_label.c

@@ -159,7 +159,6 @@ void lv_label_set_text_vfmt(lv_obj_t * obj, const char * fmt, va_list args)
     LV_ASSERT_NULL(fmt);
 
     remove_translation_tag(obj);
-    lv_obj_invalidate(obj);
     lv_label_t * label = (lv_label_t *)obj;
 
     lv_label_revert_dots(obj);
@@ -707,8 +706,6 @@ void lv_label_ins_text(lv_obj_t * obj, uint32_t pos, const char * txt)
     /*Cannot append to static text*/
     if(label->static_txt != 0) return;
 
-    lv_obj_invalidate(obj);
-
     /*Allocate space for the new text*/
     size_t old_len = lv_strlen(label->text);
     size_t ins_len = lv_strlen(txt);
@@ -733,8 +730,6 @@ void lv_label_cut_text(lv_obj_t * obj, uint32_t pos, uint32_t cnt)
     /*Cannot append to static text*/
     if(label->static_txt) return;
 
-    lv_obj_invalidate(obj);
-
     char * label_txt = lv_label_get_text(obj);
     /*Delete the characters*/
     lv_text_cut(label_txt, pos, cnt);
@@ -1072,6 +1067,7 @@ static void lv_label_mark_need_refr_text(lv_obj_t * obj)
     label->invalid_size_cache = true;
     label->need_refr_text = true;
 
+    lv_obj_invalidate(obj);
     lv_obj_refresh_self_size(obj);
 
     lv_obj_request_layout_complete_event(obj);

tests/src/test_cases/widgets/test_label.c

@@ -852,4 +852,60 @@ void test_label_setting_text_disables_translation(void)
     TEST_ASSERT_EQUAL_STRING(lv_label_get_text(label), "Der Tiger");
 }
 
+static void display_invalidate_area_cb(lv_event_t * e)
+{
+    int * i = lv_event_get_user_data(e);
+    *i += 1;
+}
+
+void test_label_invalidate_area(void)
+{
+    int i = 0;
+    label = lv_label_create(lv_screen_active());
+    lv_display_add_event_cb(lv_display_get_default(), display_invalidate_area_cb, LV_EVENT_INVALIDATE_AREA, &i);
+    i = 0;
+    lv_label_set_text_static(label, "Hello world");
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_label_set_text(label, "Hello world");
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_label_set_text_fmt(label, "%s", "Hello world");
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_label_set_long_mode(label, LV_LABEL_LONG_MODE_SCROLL);
+    TEST_ASSERT(i > 0);
+
+#if LV_LABEL_TEXT_SELECTION
+    i = 0;
+    lv_label_set_text_selection_start(label, 1);
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_label_set_text_selection_end(label, 1);
+    TEST_ASSERT(i > 0);
+#endif
+
+    i = 0;
+    lv_label_set_recolor(label, true);
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_label_ins_text(label, 5, " world");
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_label_cut_text(label, 5, 5);
+    TEST_ASSERT(i > 0);
+
+    i = 0;
+    lv_obj_set_style_align(label, LV_ALIGN_CENTER, 0);
+    TEST_ASSERT(i > 0);
+
+    lv_display_remove_event_cb_with_user_data(lv_display_get_default(), display_invalidate_area_cb, &i);
+}
+
 #endif