2 files changed, 59 insertions, 0 deletions
diff --git a/libdino/src/plugin/interfaces.vala b/libdino/src/plugin/interfaces.vala
index 729f7b26..5ffd491f 100644
--- a/libdino/src/plugin/interfaces.vala
+++ b/libdino/src/plugin/interfaces.vala
@@ -71,4 +71,41 @@ public interface ConversationTitlebarWidget : Object {
     public abstract void set_conversation(Conversation conversation);
 }
 
+public abstract interface ConversationItemPopulator : Object {
+    public abstract string id { get; }
+    public abstract void init(Conversation conversation, ConversationItemCollection summary, WidgetType type);
+    public virtual void populate_timespan(Conversation conversation, DateTime from, DateTime to) { }
+    public virtual void populate_between_widgets(Conversation conversation, DateTime from, DateTime to) { }
+    public abstract void close(Conversation conversation);
+}
+
+public abstract class MetaConversationItem : Object {
+    public virtual Jid? jid { get; set; default=null; }
+    public virtual string color { get; set; default=null; }
+    public virtual string display_name { get; set; default=null; }
+    public virtual bool dim { get; set; default=false; }
+    public virtual DateTime? sort_time { get; set; default=null; }
+    public virtual DateTime? display_time { get; set; default=null; }
+    public virtual Encryption? encryption { get; set; default=null; }
+    public virtual Entities.Message.Marked? mark { get; set; default=null; }
+
+    public abstract bool can_merge { get; set; }
+    public abstract bool requires_avatar { get; set; }
+    public abstract bool requires_header { get; set; }
+
+    public abstract Object get_widget(WidgetType type);
+}
+
+public interface ConversationItemCollection : Object {
+    public abstract void insert_item(MetaConversationItem item);
+    public abstract void remove_item(MetaConversationItem item);
+}
+
+public interface MessageDisplayProvider : Object {
+    public abstract string id { get; set; }
+    public abstract double priority { get; set; }
+    public abstract bool can_display(Entities.Message? message);
+    public abstract MetaConversationItem? get_item(Entities.Message message, Entities.Conversation conversation);
+}
+
 }
diff --git a/libdino/src/plugin/registry.vala b/libdino/src/plugin/registry.vala
index 6284269b..7b4410aa 100644
--- a/libdino/src/plugin/registry.vala
+++ b/libdino/src/plugin/registry.vala
@@ -7,6 +7,8 @@ public class Registry {
     internal ArrayList<AccountSettingsEntry> account_settings_entries = new ArrayList<AccountSettingsEntry>();
     internal ArrayList<ContactDetailsProvider> contact_details_entries = new ArrayList<ContactDetailsProvider>();
     internal Map<string, TextCommand> text_commands = new HashMap<string, TextCommand>();
+    internal Gee.List<MessageDisplayProvider> message_displays = new ArrayList<MessageDisplayProvider>();
+    internal Gee.List<ConversationItemPopulator> conversation_item_populators = new ArrayList<ConversationItemPopulator>();
     internal Gee.Collection<ConversationTitlebarEntry> conversation_titlebar_entries = new Gee.TreeSet<ConversationTitlebarEntry>((a, b) => {
         if (a.order < b.order) {
             return -1;
@@ -67,6 +69,26 @@ public class Registry {
             return true;
         }
     }
+
+    public bool register_message_display(MessageDisplayProvider provider) {
+        lock (message_displays) {
+            foreach(MessageDisplayProvider p in message_displays) {
+                if (p.id == provider.id) return false;
+            }
+            message_displays.add(provider);
+            return true;
+        }
+    }
+
+    public bool register_conversation_item_populator(ConversationItemPopulator populator) {
+        lock (conversation_item_populators) {
+            foreach(ConversationItemPopulator p in conversation_item_populators) {
+                if (p.id == populator.id) return false;
+            }
+            conversation_item_populators.add(populator);
+            return true;
+        }
+    }
 }
 
 }