Initial pass at an UnreadStatusManager.

Needs to allow configuring of the colours, and provide events
for notifying the UI.

src/com/dmdirc/ui/messages/UnreadStatusManager.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2006-2014 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.ui.messages;
+
+import com.dmdirc.DMDircMBassador;
+import com.dmdirc.FrameContainer;
+import com.dmdirc.events.BaseChannelTextEvent;
+import com.dmdirc.events.BaseQueryTextEvent;
+import com.dmdirc.events.ChannelHighlightEvent;
+import com.dmdirc.events.DisplayableEvent;
+import com.dmdirc.events.QueryHighlightEvent;
+import com.dmdirc.util.colours.Colour;
+
+import java.util.Optional;
+
+import net.engio.mbassy.listener.Handler;
+
+/**
+ * Tracks unread messages and other notifications.
+ */
+public class UnreadStatusManager {
+
+    private final DMDircMBassador eventBus;
+    private final FrameContainer container;
+    private int unreadLines;
+    private Optional<Colour> notificationColour;
+
+    private Colour miscellaneousColour = Colour.GREEN;
+    private Colour messageColour = Colour.BLACK;
+    private Colour highlightColour = Colour.RED;
+
+    public UnreadStatusManager(final FrameContainer container) {
+        this.container = container;
+        this.eventBus = container.getEventBus();
+    }
+
+    @Handler
+    public void handleDisplayableEvent(final DisplayableEvent event) {
+        if (event.getSource().equals(container)) {
+            unreadLines++;
+            raiseNotificationColour(miscellaneousColour);
+        }
+    }
+
+    @Handler
+    public void handleChannelTextEvent(final BaseChannelTextEvent event) {
+        if (event.getSource().equals(container)) {
+            raiseNotificationColour(messageColour);
+        }
+    }
+
+    @Handler
+    public void handleQueryTextEvent(final BaseQueryTextEvent event) {
+        if (event.getSource().equals(container)) {
+            raiseNotificationColour(messageColour);
+        }
+    }
+
+    @Handler
+    public void handleChannelHighlightEvent(final ChannelHighlightEvent event) {
+        if (event.getCause().getChannel().equals(container)) {
+            raiseNotificationColour(highlightColour);
+        }
+    }
+
+    @Handler
+    public void handleQueryHighlightEvent(final QueryHighlightEvent event) {
+        if (event.getCause().getQuery().equals(container)) {
+            raiseNotificationColour(highlightColour);
+        }
+    }
+
+    public int getUnreadLines() {
+        return unreadLines;
+    }
+
+    public Optional<Colour> getNotificationColour() {
+        return notificationColour;
+    }
+
+    public void clearStatus() {
+        unreadLines = 0;
+        notificationColour = Optional.empty();
+    }
+
+    private void raiseNotificationColour(final Colour colour) {
+        if (notificationColour.isPresent()) {
+            if (notificationColour.get().equals(miscellaneousColour)
+                    || colour.equals(highlightColour)) {
+                notificationColour = Optional.of(colour);
+            }
+        } else {
+            notificationColour = Optional.of(colour);
+        }
+    }
+
+}