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@@ -216,20 +216,26 @@ static void NewsWindowProc(Window *w, Wi
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SetDirtyBlocks(w->left, w->top - diff, w->left + w->width, w->top + w->height);
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} break;
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}
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}
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// returns the correct index in the array
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// (to deal with overflows)
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static byte increaseIndex(byte i)
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/** Return the correct index in the pseudo-fifo
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* queue and deals with overflows when increasing the index */
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static inline byte increaseIndex(byte i)
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{
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if (i == INVALID_NEWS) return 0;
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i++;
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if (i >= MAX_NEWS) i = i % MAX_NEWS;
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return i;
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return (i + 1) % MAX_NEWS;
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}
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/** Return the correct index in the pseudo-fifo
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* queue and deals with overflows when decreasing the index */
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static inline byte decreaseIndex(byte i)
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{
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assert(i != INVALID_NEWS);
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return (i + MAX_NEWS - 1) % MAX_NEWS;
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}
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/** Add a new newsitem to be shown.
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* @param string String to display, can have special values based on parameter 'flags'
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* @param flags various control bits that will show various news-types. See macro NEWS_FLAGS()
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* @param data_a news-specific value based on news type
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@@ -248,56 +254,57 @@ static byte increaseIndex(byte i)
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* @see NewsMode
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* @see NewsFlags
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* @see NewsType
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* @see NewsCallback */
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void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
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{
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NewsItem *ni;
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Window *w;
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byte l_news;
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if (_game_mode == GM_MENU) return;
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// check the rare case that the oldest (to be overwritten) news item is open
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if (_total_news==MAX_NEWS && (_oldest_news == _current_news || _oldest_news == _forced_news))
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if (_total_news == MAX_NEWS && (_oldest_news == _current_news || _oldest_news == _forced_news))
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MoveToNexItem();
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_forced_news = INVALID_NEWS;
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if (_total_news < MAX_NEWS) _total_news++;
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// make sure our pointer isn't overflowing
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l_news = _latest_news;
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_latest_news = increaseIndex(_latest_news);
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/* If the fifo-buffer is full, overwrite the oldest entry */
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if (l_news != INVALID_NEWS && _latest_news == _oldest_news)
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_oldest_news = increaseIndex(_oldest_news); // but make sure we're not overflowing here
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if (l_news != INVALID_NEWS && _latest_news == _oldest_news) {
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assert(_total_news == MAX_NEWS);
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_oldest_news = increaseIndex(_oldest_news);
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}
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// add news to _latest_news
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ni = &_news_items[_latest_news];
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memset(ni, 0, sizeof(*ni));
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{ /* Add news to _latest_news */
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Window *w;
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NewsItem *ni = &_news_items[_latest_news];
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memset(ni, 0, sizeof(*ni));
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ni->string_id = string;
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ni->display_mode = (byte)flags;
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ni->flags = (byte)(flags >> 8);
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ni->string_id = string;
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ni->display_mode = (byte)flags;
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ni->flags = (byte)(flags >> 8);
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// show this news message in color?
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if (_cur_year >= _patches.colored_news_year)
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ni->flags |= NF_INCOLOR;
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// show this news message in color?
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if (_cur_year >= _patches.colored_news_year) ni->flags |= NF_INCOLOR;
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ni->type = (byte)(flags >> 16);
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ni->callback = (byte)(flags >> 24);
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ni->data_a = data_a;
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ni->data_b = data_b;
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ni->date = _date;
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COPY_OUT_DPARAM(ni->params, 0, lengthof(ni->params));
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ni->type = (byte)(flags >> 16);
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ni->callback = (byte)(flags >> 24);
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ni->data_a = data_a;
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ni->data_b = data_b;
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ni->date = _date;
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COPY_OUT_DPARAM(ni->params, 0, lengthof(ni->params));
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w = FindWindowById(WC_MESSAGE_HISTORY, 0);
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if (w == NULL) return;
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SetWindowDirty(w);
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w->vscroll.count = _total_news;
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w = FindWindowById(WC_MESSAGE_HISTORY, 0);
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if (w == NULL) return;
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SetWindowDirty(w);
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w->vscroll.count = _total_news;
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}
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}
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// don't show item if it's older than x days
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static const byte _news_items_age[] = {60, 60, 90, 60, 90, 30, 150, 30, 90, 180};
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@@ -468,13 +475,13 @@ static bool ReadyForNextItem(void)
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static void MoveToNexItem(void)
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{
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DeleteWindowById(WC_NEWS_WINDOW, 0);
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_forced_news = INVALID_NEWS;
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// if we're not at the last item, than move on
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// if we're not at the last item, then move on
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if (_current_news != _latest_news) {
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NewsItem *ni;
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_current_news = increaseIndex(_current_news);
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ni = &_news_items[_current_news];
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@@ -533,18 +540,22 @@ static void ShowNewsMessage(byte i)
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ShowNewspaper(ni);
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}
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}
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void ShowLastNewsMessage(void)
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{
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if (_forced_news == INVALID_NEWS) {
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ShowNewsMessage(_current_news);
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} else if (_forced_news != 0) {
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ShowNewsMessage(_forced_news - 1);
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} else {
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ShowNewsMessage(_total_news != MAX_NEWS ? _latest_news : MAX_NEWS - 1);
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switch (_forced_news) {
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case INVALID_NEWS: // Not forced any news yet, show the current one
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ShowNewsMessage(_current_news);
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break;
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case 0: //
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ShowNewsMessage(_total_news != MAX_NEWS ? _latest_news : MAX_NEWS - 1);
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break;
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default: // 'Scrolling' through news history show each one in turn
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ShowNewsMessage(_forced_news - 1);
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break;
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}
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}
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/* return news by number, with 0 being the most
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* recent news. Returns INVALID_NEWS if end of queue reached. */
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@@ -873,23 +884,22 @@ void ShowMessageOptions(void)
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void DeleteVehicleNews(VehicleID vid, StringID news)
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{
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byte n;
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for (n = _oldest_news; _latest_news != INVALID_NEWS && n != (_latest_news + 1) % MAX_NEWS; n = (n + 1) % MAX_NEWS) {
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const NewsItem* ni = &_news_items[n];
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for (n = _oldest_news; _latest_news != INVALID_NEWS && n != increaseIndex(_latest_news); n = increaseIndex(n)) {
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const NewsItem *ni = &_news_items[n];
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if (ni->flags & NF_VEHICLE &&
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ni->data_a == vid &&
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(news == INVALID_STRING_ID || ni->string_id == news)) {
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Window *w;
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byte i;
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if (_forced_news == n) MoveToNexItem();
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if (_current_news == n) MoveToNexItem();
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if (_forced_news == n || _current_news == n) MoveToNexItem();
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// If this is the last news item, invalidate _latest_news
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if (_latest_news == _oldest_news) _latest_news = INVALID_NEWS;
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if (n != _oldest_news) {
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for (i = n; i != _oldest_news; i = (i + MAX_NEWS - 1) % MAX_NEWS) {
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