mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r13317) -Codechange: make news messages use a linked list instead of a moving circular buffer. This makes it possible to store more news messages in the history. Based on a patch by Cirdan.
-Codechange: the number of news messages is reduced by removing every news message that is a configurable amount older than when it would not be shown in the newspaper popup/ticker, which is e.g. a month for industry production changes and half a year for subsidy offers. As a result the more important messages will stay longer in the message history (if longer than 30 messages).
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parent
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394
src/news_gui.cpp
394
src/news_gui.cpp
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@ -24,52 +24,24 @@
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#include "table/sprites.h"
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#include "table/strings.h"
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/** @file news_gui.cpp
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*
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* News system is realized as a FIFO queue (in an array)
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* The positions in the queue can't be rearranged, we only access
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* the array elements through pointers to the elements. Once the
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* array is full, the oldest entry (\a _oldest_news) is being overwritten
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* by the newest (\a _latest_news).
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*
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* \verbatim
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* oldest current lastest
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* | | |
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* [O------------F-------------C---------L ]
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* |
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* forced
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* \endverbatim
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*
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* Of course by using an array we can have situations like
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*
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* \verbatim
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* [----L O-----F---------C-----------------]
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* This is where we have wrapped around the array and have
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* (MAX_NEWS - O) + L news items
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* \endverbatim
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*/
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#define NB_WIDG_PER_SETTING 4
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typedef byte NewsID;
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#define INVALID_NEWS 255
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NewsItem _statusbar_news_item;
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bool _news_ticker_sound;
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static NewsItem *_news_items = NULL; ///< The news FIFO queue
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static uint _max_news_items = 0; ///< size of news FIFO queue
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static NewsID _current_news = INVALID_NEWS; ///< points to news item that should be shown next
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static NewsID _oldest_news = 0; ///< points to first item in fifo queue
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static NewsID _latest_news = INVALID_NEWS; ///< points to last item in fifo queue
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static uint MIN_NEWS_AMOUNT = 30; ///< prefered minimum amount of news messages
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static uint _total_news = 0; ///< current number of news items
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static NewsItem *_oldest_news = NULL; ///< head of news items queue
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static NewsItem *_latest_news = NULL; ///< tail of news items queue
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/** Forced news item.
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* Users can force an item by accessing the history or "last message".
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* If the message being shown was forced by the user, its index is stored in
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* _forced_news. Otherwise, \a _forced_news variable is INVALID_NEWS. */
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static NewsID _forced_news = INVALID_NEWS;
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* If the message being shown was forced by the user, a pointer is stored
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* in _forced_news. Otherwise, \a _forced_news variable is NULL. */
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static NewsItem *_forced_news = NULL; ///< item the user has asked for
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static uint _total_news = 0; ///< Number of news items in FIFO queue @see _news_items
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static void MoveToNextItem();
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/** Current news item (last item shown regularly). */
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static NewsItem *_current_news = NULL;
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typedef void DrawNewsCallbackProc(struct Window *w, const NewsItem *ni);
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@ -202,7 +174,7 @@ struct NewsWindow : Window {
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const Window *w = FindWindowById(WC_SEND_NETWORK_MSG, 0);
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this->chat_height = (w != NULL) ? w->height : 0;
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this->ni = &_news_items[_forced_news == INVALID_NEWS ? _current_news : _forced_news];
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this->ni = _forced_news == NULL ? _current_news : _forced_news;
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this->flags4 |= WF_DISABLE_VP_SCROLL;
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this->FindWindowPlacementAndResize(desc);
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@ -288,7 +260,7 @@ struct NewsWindow : Window {
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case 1:
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this->ni->duration = 0;
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delete this;
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_forced_news = INVALID_NEWS;
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_forced_news = NULL;
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break;
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case 0:
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@ -425,9 +397,6 @@ static void ShowNewspaper(NewsItem *ni)
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}
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break;
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}
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/*DEBUG(misc, 0, " cur %3d, old %2d, lat %3d, for %3d, tot %2d",
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_current_news, _oldest_news, _latest_news, _forced_news, _total_news);*/
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}
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/** Show news item in the ticker */
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@ -442,153 +411,17 @@ static void ShowTicker(const NewsItem *ni)
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/** Initialize the news-items data structures */
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void InitNewsItemStructs()
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{
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free(_news_items);
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_max_news_items = max(ScaleByMapSize(30), 30U);
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_news_items = CallocT<NewsItem>(_max_news_items);
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_current_news = INVALID_NEWS;
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_oldest_news = 0;
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_latest_news = INVALID_NEWS;
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_forced_news = INVALID_NEWS;
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for (NewsItem *ni = _oldest_news; ni != NULL; ) {
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NewsItem *next = ni->next;
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delete ni;
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ni = next;
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}
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_total_news = 0;
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}
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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 increasing the index
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*/
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static inline NewsID IncreaseIndex(NewsID i)
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{
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assert(i != INVALID_NEWS);
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return (i + 1) % _max_news_items;
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}
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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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*/
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static inline NewsID DecreaseIndex(NewsID i)
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{
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assert(i != INVALID_NEWS);
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return (i + _max_news_items - 1) % _max_news_items;
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}
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/**
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* Add a new newsitem to be shown.
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* @param string String to display
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* @param subtype news category, any of the NewsSubtype enums (NS_)
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* @param data_a news-specific value based on news type
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* @param data_b news-specific value based on news type
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*
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* @see NewsSubype
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*/
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void AddNewsItem(StringID string, NewsSubtype subtype, uint data_a, uint data_b)
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{
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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_items && (_oldest_news == _current_news || _oldest_news == _forced_news)) {
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MoveToNextItem();
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}
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if (_total_news < _max_news_items) _total_news++;
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/* Increase _latest_news. If we have no news yet, use _oldest news as an
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* index. We cannot use 0 as _oldest_news can jump around due to
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* DeleteVehicleNews */
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NewsID l_news = _latest_news;
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_latest_news = (_latest_news == INVALID_NEWS) ? _oldest_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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assert(_total_news == _max_news_items);
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_oldest_news = IncreaseIndex(_oldest_news);
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}
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/*DEBUG(misc, 0, "+cur %3d, old %2d, lat %3d, for %3d, tot %2d",
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_current_news, _oldest_news, _latest_news, _forced_news, _total_news);*/
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/* Add news to _latest_news */
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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->subtype = subtype;
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ni->flags = _news_subtype_data[subtype].flags;
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/* show this news message in color? */
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if (_cur_year >= _settings.gui.colored_news_year) ni->flags |= NF_INCOLOR;
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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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CopyOutDParam(ni->params, 0, lengthof(ni->params));
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Window *w = FindWindowById(WC_MESSAGE_HISTORY, 0);
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if (w == NULL) return;
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w->SetDirty();
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w->vscroll.count = _total_news;
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}
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void DeleteVehicleNews(VehicleID vid, StringID news)
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{
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for (NewsID n = _oldest_news; _latest_news != INVALID_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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/* If we delete a forced news and it is just before the current news
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* then we need to advance to the next news (if any) */
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if (_forced_news == n) MoveToNextItem();
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if (_forced_news == INVALID_NEWS && _current_news == n) MoveToNextItem();
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_total_news--;
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/* If this is the last news item, invalidate _latest_news */
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if (_total_news == 0) {
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assert(_latest_news == _oldest_news);
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_latest_news = INVALID_NEWS;
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_current_news = INVALID_NEWS;
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}
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/* Since we only imitate a FIFO removing an arbitrary element does need
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* some magic. Remove the item by shifting head towards the tail. eg
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* oldest remove last
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* | | |
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* [------O--------n-----L--]
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* will become (change dramatized to make clear)
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* [---------O-----------L--]
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* We also need an update of the current, forced and visible (open window)
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* news's as this shifting could change the items they were pointing to */
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if (_total_news != 0) {
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NewsWindow *w = dynamic_cast<NewsWindow*>(FindWindowById(WC_NEWS_WINDOW, 0));
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NewsID visible_news = (w != NULL) ? (NewsID)(w->ni - _news_items) : INVALID_NEWS;
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for (NewsID i = n;; i = DecreaseIndex(i)) {
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_news_items[i] = _news_items[DecreaseIndex(i)];
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if (i != _latest_news) {
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if (i == _current_news) _current_news = IncreaseIndex(_current_news);
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if (i == _forced_news) _forced_news = IncreaseIndex(_forced_news);
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if (i == visible_news) w->ni = &_news_items[IncreaseIndex(visible_news)];
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}
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if (i == _oldest_news) break;
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}
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_oldest_news = IncreaseIndex(_oldest_news);
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}
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/*DEBUG(misc, 0, "-cur %3d, old %2d, lat %3d, for %3d, tot %2d",
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_current_news, _oldest_news, _latest_news, _forced_news, _total_news);*/
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Window *w = FindWindowById(WC_MESSAGE_HISTORY, 0);
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if (w != NULL) {
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w->SetDirty();
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w->vscroll.count = _total_news;
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}
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}
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if (n == _latest_news) break;
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}
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_oldest_news = NULL;
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_latest_news = NULL;
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_forced_news = NULL;
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_current_news = NULL;
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}
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/**
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*/
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static bool ReadyForNextItem()
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{
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NewsID item = (_forced_news == INVALID_NEWS) ? _current_news : _forced_news;
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if (item >= _max_news_items) return true;
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NewsItem *ni = &_news_items[item];
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NewsItem *ni = _forced_news == NULL ? _current_news : _forced_news;
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if (ni == NULL) return true;
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/* Ticker message
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* Check if the status bar message is still being displayed? */
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static void MoveToNextItem()
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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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_forced_news = NULL;
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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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_current_news = (_current_news == INVALID_NEWS) ? _oldest_news : IncreaseIndex(_current_news);
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NewsItem *ni = &_news_items[_current_news];
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_current_news = (_current_news == NULL) ? _oldest_news : _current_news->next;
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NewsItem *ni = _current_news;
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const NewsType type = _news_subtype_data[ni->subtype].type;
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/* check the date, don't show too old items */
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}
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}
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/**
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* Add a new newsitem to be shown.
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* @param string String to display
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* @param subtype news category, any of the NewsSubtype enums (NS_)
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* @param data_a news-specific value based on news type
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* @param data_b news-specific value based on news type
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*
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* @see NewsSubype
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*/
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void AddNewsItem(StringID string, NewsSubtype subtype, uint data_a, uint data_b)
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{
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if (_game_mode == GM_MENU) return;
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/* Create new news item node */
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NewsItem *ni = new NewsItem;
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ni->string_id = string;
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ni->subtype = subtype;
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ni->flags = _news_subtype_data[subtype].flags;
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/* show this news message in color? */
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if (_cur_year >= _settings.gui.colored_news_year) ni->flags |= NF_INCOLOR;
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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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CopyOutDParam(ni->params, 0, lengthof(ni->params));
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if (_total_news++ == 0) {
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assert(_oldest_news == NULL);
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_oldest_news = ni;
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ni->prev = NULL;
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} else {
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assert(_latest_news->next == NULL);
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_latest_news->next = ni;
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ni->prev = _latest_news;
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}
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ni->next = NULL;
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_latest_news = ni;
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InvalidateWindow(WC_MESSAGE_HISTORY, 0);
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}
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/** Delete a news item from the queue */
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static void DeleteNewsItem(NewsItem *ni)
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{
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if (_forced_news == ni) {
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/* about to remove the currently forced item; skip to next */
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MoveToNextItem();
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}
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if ((_current_news == ni) && (FindWindowById(WC_MESSAGE_HISTORY, 0) != NULL)) {
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/* about to remove the currently displayed item; also skip */
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MoveToNextItem();
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}
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/* delete item */
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if (ni->prev != NULL) {
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ni->prev->next = ni->next;
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} else {
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assert(_oldest_news == ni);
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_oldest_news = ni->next;
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}
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if (ni->next != NULL) {
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ni->next->prev = ni->prev;
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} else {
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assert(_latest_news == ni);
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_latest_news = ni->prev;
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}
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if (_current_news == ni) _current_news = ni->prev;
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_total_news--;
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delete ni;
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InvalidateWindow(WC_MESSAGE_HISTORY, 0);
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}
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void DeleteVehicleNews(VehicleID vid, StringID news)
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{
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NewsItem *ni = _oldest_news;
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while (ni != NULL) {
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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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/* grab a pointer to the next item before ni is freed */
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NewsItem *p = ni->next;
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DeleteNewsItem(ni);
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ni = p;
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} else {
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ni = ni->next;
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}
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}
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}
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void RemoveOldNewsItems()
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{
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NewsItem *next;
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for (NewsItem *cur = _oldest_news; _total_news > MIN_NEWS_AMOUNT && cur != NULL; cur = next) {
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next = cur->next;
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if (_date - _news_type_data[_news_subtype_data[cur->subtype].type].age * _settings.gui.news_message_timeout > cur->date) DeleteNewsItem(cur);
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}
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}
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void NewsLoop()
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{
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/* no news item yet */
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if (_total_news == 0) return;
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static byte _last_clean_month = 0;
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if (_last_clean_month != _cur_month) {
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RemoveOldNewsItems();
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_last_clean_month = _cur_month;
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}
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if (ReadyForNextItem()) MoveToNextItem();
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}
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/** Do a forced show of a specific message */
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static void ShowNewsMessage(NewsID i)
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static void ShowNewsMessage(NewsItem *ni)
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{
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if (_total_news == 0) return;
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assert(_total_news != 0);
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/* Delete the news window */
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DeleteWindowById(WC_NEWS_WINDOW, 0);
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/* setup forced news item */
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_forced_news = i;
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_forced_news = ni;
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if (_forced_news != INVALID_NEWS) {
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NewsItem *ni = &_news_items[_forced_news];
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if (_forced_news != NULL) {
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ni->duration = 555;
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ni->flags |= NF_FORCE_BIG;
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DeleteWindowById(WC_NEWS_WINDOW, 0);
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@ -679,37 +623,23 @@ static void ShowNewsMessage(NewsID i)
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/** Show previous news item */
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void ShowLastNewsMessage()
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{
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if (_forced_news == INVALID_NEWS) {
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if (_total_news == 0) {
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return;
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} else if (_forced_news == NULL) {
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/* Not forced any news yet, show the current one, unless a news window is
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* open (which can only be the current one), then show the previous item */
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const Window *w = FindWindowById(WC_NEWS_WINDOW, 0);
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ShowNewsMessage((w == NULL || (_current_news == _oldest_news)) ? _current_news : DecreaseIndex(_current_news));
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ShowNewsMessage((w == NULL || (_current_news == _oldest_news)) ? _current_news : _current_news->prev);
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} else if (_forced_news == _oldest_news) {
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/* We have reached the oldest news, start anew with the latest */
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ShowNewsMessage(_latest_news);
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} else {
|
||||
/* 'Scrolling' through news history show each one in turn */
|
||||
ShowNewsMessage(DecreaseIndex(_forced_news));
|
||||
ShowNewsMessage(_forced_news->prev);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* return news by number, with 0 being the most
|
||||
* recent news. Returns INVALID_NEWS if end of queue reached. */
|
||||
static NewsID getNews(NewsID i)
|
||||
{
|
||||
if (i >= _total_news) return INVALID_NEWS;
|
||||
|
||||
if (_latest_news < i) {
|
||||
i = _latest_news + _max_news_items - i;
|
||||
} else {
|
||||
i = _latest_news - i;
|
||||
}
|
||||
|
||||
i %= _max_news_items;
|
||||
return i;
|
||||
}
|
||||
|
||||
/**
|
||||
* Draw an unformatted news message truncated to a maximum length. If
|
||||
* length exceeds maximum length it will be postfixed by '...'
|
||||
|
@ -775,27 +705,37 @@ struct MessageHistoryWindow : Window {
|
|||
this->DrawWidgets();
|
||||
|
||||
if (_total_news == 0) return;
|
||||
NewsID show = min(_total_news, this->vscroll.cap);
|
||||
|
||||
for (NewsID p = this->vscroll.pos; p < this->vscroll.pos + show; p++) {
|
||||
/* get news in correct order */
|
||||
const NewsItem *ni = &_news_items[getNews(p)];
|
||||
NewsItem *ni = _latest_news;
|
||||
for (int n = this->vscroll.pos; n > 0; n--) {
|
||||
ni = ni->prev;
|
||||
if (ni == NULL) return;
|
||||
}
|
||||
|
||||
for (int n = this->vscroll.cap; n > 0; n--) {
|
||||
SetDParam(0, ni->date);
|
||||
DrawString(4, y, STR_SHORT_DATE, TC_WHITE);
|
||||
|
||||
DrawNewsString(82, y, TC_WHITE, ni, this->width - 95);
|
||||
y += 12;
|
||||
|
||||
ni = ni->prev;
|
||||
if (ni == NULL) return;
|
||||
}
|
||||
}
|
||||
|
||||
virtual void OnClick(Point pt, int widget)
|
||||
{
|
||||
if (widget == 3) {
|
||||
int y = (pt.y - 19) / 12;
|
||||
NewsID p = getNews(y + this->vscroll.pos);
|
||||
NewsItem *ni = _latest_news;
|
||||
if (ni == NULL) return;
|
||||
|
||||
if (p != INVALID_NEWS) ShowNewsMessage(p);
|
||||
for (int n = (pt.y - 19) / 12 + this->vscroll.pos; n > 0; n--) {
|
||||
ni = ni->prev;
|
||||
if (ni == NULL) return;
|
||||
}
|
||||
|
||||
ShowNewsMessage(ni);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
@ -101,6 +101,8 @@ struct NewsTypeData {
|
|||
};
|
||||
|
||||
struct NewsItem {
|
||||
NewsItem *prev; ///< Previous news item
|
||||
NewsItem *next; ///< Next news item
|
||||
StringID string_id; ///< Message text
|
||||
uint16 duration; ///< Remaining time for showing this news message
|
||||
Date date; ///< Date of the news
|
||||
|
|
|
@ -1754,6 +1754,7 @@ const SettingDesc _patch_settings[] = {
|
|||
SDT_VAR(Settings, gui.max_num_autosaves, SLE_UINT8, S, 0, 16, 0, 255, 0, STR_NULL, NULL),
|
||||
SDT_BOOL(Settings, gui.bridge_pillars, S, 0, true, STR_NULL, NULL),
|
||||
SDT_BOOL(Settings, gui.auto_euro, S, 0, true, STR_NULL, NULL),
|
||||
SDT_VAR(Settings, gui.news_message_timeout, SLE_UINT8, S, 0, 2, 1, 255, 0, STR_NULL, NULL),
|
||||
|
||||
SDT_VAR(Settings, game_creation.map_x, SLE_UINT8, S, 0, 8, 6, 11, 0, STR_CONFIG_PATCHES_MAP_X, NULL),
|
||||
SDT_VAR(Settings, game_creation.map_y, SLE_UINT8, S, 0, 8, 6, 11, 0, STR_CONFIG_PATCHES_MAP_Y, NULL),
|
||||
|
|
|
@ -79,6 +79,7 @@ struct GUISettings {
|
|||
int32 autorenew_money; ///< how much money before autorenewing for new companies?
|
||||
byte currency; ///< currency we currently use
|
||||
byte units; ///< unit system we show everything
|
||||
byte news_message_timeout; ///< how much longer than the news message "age" should we keep the message in the history
|
||||
};
|
||||
|
||||
/** Settings related to the creation of games. */
|
||||
|
|
Loading…
Reference in New Issue