From 3bfb1d9736e05fe216c016ae2dbb8eac4ac78048 Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Sat, 20 Jan 2018 14:52:58 +0900
Subject: Room: store the first displayed event as well;
 Room::*DisplayedMarker() methods

---
 room.cpp | 33 ++++++++++++++++++++++++++++++++-
 room.h   | 12 ++++++++++--
 2 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/room.cpp b/room.cpp
index 68762a8a..8c6465e2 100644
--- a/room.cpp
+++ b/room.cpp
@@ -91,6 +91,7 @@ class Room::Private
         QList<User*> membersLeft;
         bool unreadMessages = false;
         bool displayed = false;
+        QString firstDisplayedEventId;
         QString lastDisplayedEventId;
         QHash<const User*, QString> lastReadEventIds;
         QString prevBatch;
@@ -436,18 +437,48 @@ void Room::setDisplayed(bool displayed)
     }
 }
 
+QString Room::firstDisplayedEventId() const
+{
+    return d->firstDisplayedEventId;
+}
+
+Room::rev_iter_t Room::firstDisplayedMarker() const
+{
+    return findInTimeline(firstDisplayedEventId());
+}
+
+void Room::setFirstDisplayedEventId(const QString& eventId)
+{
+    if (d->firstDisplayedEventId == eventId)
+        return;
+
+    d->firstDisplayedEventId = eventId;
+    emit firstDisplayedEventChanged();
+}
+
+void Room::setFirstDisplayedEvent(TimelineItem::index_t index)
+{
+    Q_ASSERT(isValidIndex(index));
+    setFirstDisplayedEventId(findInTimeline(index)->event()->id());
+}
+
 QString Room::lastDisplayedEventId() const
 {
     return d->lastDisplayedEventId;
 }
 
+Room::rev_iter_t Room::lastDisplayedMarker() const
+{
+    return findInTimeline(lastDisplayedEventId());
+}
+
 void Room::setLastDisplayedEventId(const QString& eventId)
 {
     if (d->lastDisplayedEventId == eventId)
         return;
 
     d->lastDisplayedEventId = eventId;
-    emit lastDisplayedEventIdChanged();
+    emit lastDisplayedEventChanged();
 }
 
 void Room::setLastDisplayedEvent(TimelineItem::index_t index)
diff --git a/room.h b/room.h
index 33514ac9..2284e8b1 100644
--- a/room.h
+++ b/room.h
@@ -110,7 +110,8 @@ namespace QMatrixClient
             Q_PROPERTY(int memberCount READ memberCount NOTIFY memberListChanged)
 
             Q_PROPERTY(bool displayed READ displayed WRITE setDisplayed NOTIFY displayedChanged)
-            Q_PROPERTY(QString lastDisplayedEventId READ lastDisplayedEventId WRITE setLastDisplayedEventId NOTIFY lastDisplayedEventIdChanged)
+            Q_PROPERTY(QString firstDisplayedEventId READ firstDisplayedEventId WRITE setFirstDisplayedEventId NOTIFY firstDisplayedEventChanged)
+            Q_PROPERTY(QString lastDisplayedEventId READ lastDisplayedEventId WRITE setLastDisplayedEventId NOTIFY lastDisplayedEventChanged)
 
             Q_PROPERTY(QString readMarkerEventId READ readMarkerEventId WRITE markMessagesAsRead NOTIFY readMarkerMoved)
         public:
@@ -179,9 +180,15 @@ namespace QMatrixClient
 
             bool displayed() const;
             void setDisplayed(bool displayed = true);
+            QString firstDisplayedEventId() const;
+            rev_iter_t firstDisplayedMarker() const;
+            void setFirstDisplayedEventId(const QString& eventId);
+            void setFirstDisplayedEvent(TimelineItem::index_t index);
             QString lastDisplayedEventId() const;
+            rev_iter_t lastDisplayedMarker() const;
             void setLastDisplayedEventId(const QString& eventId);
             void setLastDisplayedEvent(TimelineItem::index_t index);
+
             rev_iter_t readMarker(const User* user) const;
             rev_iter_t readMarker() const;
             QString readMarkerEventId() const;
@@ -271,7 +278,8 @@ namespace QMatrixClient
             void notificationCountChanged(Room* room);
 
             void displayedChanged(bool displayed);
-            void lastDisplayedEventIdChanged();
+            void firstDisplayedEventChanged();
+            void lastDisplayedEventChanged();
             void lastReadEventChanged(User* user);
             void readMarkerMoved();
             void unreadMessagesChanged(Room* room);
-- 
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