Codechange: use a contructor for NewsItem to set the values

And use std::unique_ptr to manage the memory of the allocated data

src/news_gui.cpp

@@ -355,7 +355,7 @@ struct NewsWindow : Window {
 				break;
 
 			case WID_N_MGR_NAME:
-				SetDParamStr(0, static_cast<const CompanyNewsInformation *>(this->ni->data)->president_name);
+				SetDParamStr(0, static_cast<const CompanyNewsInformation *>(this->ni->data.get())->president_name);
 				str = STR_JUST_RAW_STRING;
 				break;
 
@@ -433,13 +433,13 @@ struct NewsWindow : Window {
 				break;
 
 			case WID_N_MGR_FACE: {
-				const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data);
+				const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data.get());
 				DrawCompanyManagerFace(cni->face, cni->colour, r.left, r.top);
 				GfxFillRect(r.left, r.top, r.right, r.bottom, PALETTE_NEWSPAPER, FILLRECT_RECOLOUR);
 				break;
 			}
 			case WID_N_MGR_NAME: {
-				const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data);
+				const CompanyNewsInformation *cni = static_cast<const CompanyNewsInformation*>(this->ni->data.get());
 				SetDParamStr(0, cni->president_name);
 				DrawStringMultiLine(r.left, r.right, r.top, r.bottom, STR_JUST_RAW_STRING, TC_FROMSTRING, SA_CENTER);
 				break;
@@ -770,6 +770,27 @@ static void DeleteNewsItem(NewsItem *ni)
 	SetWindowDirty(WC_MESSAGE_HISTORY, 0);
 }
 
+/**
+ * Create a new newsitem to be shown.
+ * @param string_id String to display.
+ * @param type      The type of news.
+ * @param flags     Flags related to how to display the news.
+ * @param reftype1  Type of ref1.
+ * @param ref1      Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleting the news when the object is deleted.
+ * @param reftype2  Type of ref2.
+ * @param ref2      Reference 2 to some object: Used for scrolling after clicking on the news, and for deleting the news when the object is deleted.
+ * @param data      Pointer to data that must be released once the news message is cleared.
+ *
+ * @see NewsSubtype
+ */
+NewsItem::NewsItem(StringID string_id, NewsType type, NewsFlag flags, NewsReferenceType reftype1, uint32 ref1, NewsReferenceType reftype2, uint32 ref2, const NewsAllocatedData *data) :
+	string_id(string_id), date(_date), type(type), flags(flags), reftype1(reftype1), reftype2(reftype2), ref1(ref1), ref2(ref2), data(data)
+{
+	/* show this news message in colour? */
+	if (_cur_year >= _settings_client.gui.coloured_news_year) this->flags |= NF_INCOLOUR;
+	CopyOutDParam(this->params, 0, lengthof(this->params));
+}
+
 /**
  * Add a new newsitem to be shown.
  * @param string String to display
@@ -779,7 +800,7 @@ static void DeleteNewsItem(NewsItem *ni)
  * @param ref1     Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleting the news when the object is deleted.
  * @param reftype2 Type of ref2
  * @param ref2     Reference 2 to some object: Used for scrolling after clicking on the news, and for deleting the news when the object is deleted.
- * @param free_data Pointer to data that must be freed once the news message is cleared
+ * @param data     Pointer to data that must be released once the news message is cleared.
  *
  * @see NewsSubtype
  */
@@ -788,22 +809,7 @@ void AddNewsItem(StringID string, NewsType type, NewsFlag flags, NewsReferenceTy
 	if (_game_mode == GM_MENU) return;
 
 	/* Create new news item node */
-	NewsItem *ni = new NewsItem;
-
-	ni->string_id = string;
-	ni->type = type;
-	ni->flags = flags;
-
-	/* show this news message in colour? */
-	if (_cur_year >= _settings_client.gui.coloured_news_year) ni->flags |= NF_INCOLOUR;
-
-	ni->reftype1 = reftype1;
-	ni->reftype2 = reftype2;
-	ni->ref1 = ref1;
-	ni->ref2 = ref2;
-	ni->data = data;
-	ni->date = _date;
-	CopyOutDParam(ni->params, 0, lengthof(ni->params));
+	NewsItem *ni = new NewsItem(string, type, flags, reftype1, ref1, reftype2, ref2, data);
 
 	if (_total_news++ == 0) {
 		assert(_oldest_news == nullptr);

src/news_type.h

@@ -135,14 +135,11 @@ struct NewsItem {
 	uint32 ref1;                 ///< Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleting the news when the object is deleted.
 	uint32 ref2;                 ///< Reference 2 to some object: Used for scrolling after clicking on the news, and for deleting the news when the object is deleted.
 
-	const NewsAllocatedData *data; ///< Custom data for the news item that have to be deallocated (deleted) when the news item has reached its end.
-
-	~NewsItem()
-	{
-		delete this->data;
-	}
+	std::unique_ptr<const NewsAllocatedData> data; ///< Custom data for the news item that will be deallocated (deleted) when the news item has reached its end.
 
 	uint64 params[10]; ///< Parameters for string resolving.
+
+	NewsItem(StringID string_id, NewsType type, NewsFlag flags, NewsReferenceType reftype1, uint32 ref1, NewsReferenceType reftype2, uint32 ref2, const NewsAllocatedData *data);
 };
 
 /** Container for a single string to be passed as NewsAllocatedData. */