Set MessageList title in action bar depending on display mode

res/layout-land/actionbar_custom.xml

@@ -1,50 +1,72 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
+    android:layout_height="wrap_content" >
-    android:orientation="horizontal" >
 
     <LinearLayout
-        android:id="@+id/title_layout"
+        android:id="@+id/actionbar_message_list"
-        android:layout_width="0dip"
+        android:layout_width="fill_parent"
         android:layout_height="wrap_content"
-        android:layout_weight="1"
+        android:orientation="horizontal" >
-        android:layout_gravity="center_vertical"
+
-        android:orientation="vertical" >
+        <LinearLayout
+            android:id="@+id/title_layout"
+            android:layout_width="0dip"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_weight="1"
+            android:orientation="vertical" >
+
+            <TextView
+                android:id="@+id/actionbar_title_first"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:ellipsize="start"
+                android:singleLine="true"
+                android:textSize="14sp" />
+
+            <TextView
+                android:id="@+id/actionbar_title_sub"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:ellipsize="end"
+                android:singleLine="true"
+                android:textColor="?android:attr/textColorSecondary"
+                android:textSize="12sp" />
+        </LinearLayout>
+
+        <ProgressBar
+            android:id="@+id/actionbar_progress"
+            style="?android:attr/indeterminateProgressStyle"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:layout_gravity="center"
+            android:visibility="gone" />
 
         <TextView
-            android:id="@+id/actionbar_title_first"
+            android:id="@+id/actionbar_unread_count"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:ellipsize="start"
+            android:paddingLeft="12dip"
-            android:singleLine="true"
+            android:paddingRight="12dip"
-            android:textSize="14sp" />
+            android:textColor="?android:attr/textColorTertiary"
+            android:textSize="32sp" />
+    </LinearLayout>
 
-        <TextView
+    <LinearLayout
-            android:id="@+id/actionbar_title_sub"
+        android:id="@+id/actionbar_message_view"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:visibility="gone" >
+
+        <com.fsck.k9.view.MessageTitleView
+            android:id="@+id/message_title_view"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:ellipsize="end"
-            android:singleLine="true"
+            android:includeFontPadding="false"
-            android:textColor="?android:attr/textColorSecondary"
+            android:maxLines="2"
-            android:textSize="12sp" />
+            android:textSize="16sp" />
     </LinearLayout>
 
-    <ProgressBar
+</FrameLayout>
-        android:id="@+id/actionbar_progress"
-        android:layout_width="32dp"
-        android:layout_height="32dp"
-        android:layout_gravity="center"
-        style="?android:attr/indeterminateProgressStyle"
-        android:visibility="gone" />
-
-    <TextView
-        android:id="@+id/actionbar_unread_count"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:paddingLeft="12dip"
-        android:paddingRight="12dip"
-        android:textColor="?android:attr/textColorTertiary"
-        android:textSize="32sp" />
-
-</LinearLayout>

res/layout/actionbar_custom.xml

@@ -1,50 +1,72 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
+    android:layout_height="wrap_content" >
-    android:orientation="horizontal" >
 
     <LinearLayout
-        android:id="@+id/title_layout"
+        android:id="@+id/actionbar_message_list"
-        android:layout_width="0dip"
+        android:layout_width="fill_parent"
         android:layout_height="wrap_content"
-        android:layout_weight="1"
+        android:orientation="horizontal" >
-        android:layout_gravity="center_vertical"
+
-        android:orientation="vertical" >
+        <LinearLayout
+            android:id="@+id/title_layout"
+            android:layout_width="0dip"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_weight="1"
+            android:orientation="vertical" >
+
+            <TextView
+                android:id="@+id/actionbar_title_first"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:ellipsize="start"
+                android:singleLine="true"
+                android:textAppearance="?android:attr/textAppearanceMedium" />
+
+            <TextView
+                android:id="@+id/actionbar_title_sub"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:ellipsize="end"
+                android:singleLine="true"
+                android:textAppearance="?android:attr/textAppearanceSmall"
+                android:textColor="?android:attr/textColorSecondary" />
+        </LinearLayout>
+
+        <ProgressBar
+            android:id="@+id/actionbar_progress"
+            style="?android:attr/indeterminateProgressStyle"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:layout_gravity="center"
+            android:visibility="gone" />
 
         <TextView
-            android:id="@+id/actionbar_title_first"
+            android:id="@+id/actionbar_unread_count"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:ellipsize="start"
+            android:paddingLeft="12dip"
-            android:singleLine="true"
+            android:paddingRight="12dip"
-            android:textAppearance="?android:attr/textAppearanceMedium" />
+            android:textColor="?android:attr/textColorTertiary"
+            android:textSize="36sp" />
+    </LinearLayout>
 
-        <TextView
+    <LinearLayout
-            android:id="@+id/actionbar_title_sub"
+        android:id="@+id/actionbar_message_view"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:visibility="gone" >
+
+        <com.fsck.k9.view.MessageTitleView
+            android:id="@+id/message_title_view"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:ellipsize="end"
-            android:singleLine="true"
+            android:includeFontPadding="false"
-            android:textAppearance="?android:attr/textAppearanceSmall"
+            android:maxLines="2"
-            android:textColor="?android:attr/textColorSecondary" />
+            android:textSize="16sp" />
     </LinearLayout>
 
-    <ProgressBar
+</FrameLayout>
-        android:id="@+id/actionbar_progress"
-        android:layout_width="32dp"
-        android:layout_height="32dp"
-        android:layout_gravity="center"
-        style="?android:attr/indeterminateProgressStyle"
-        android:visibility="gone" />
-
-    <TextView
-        android:id="@+id/actionbar_unread_count"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:paddingLeft="12dip"
-        android:paddingRight="12dip"
-        android:textColor="?android:attr/textColorTertiary"
-        android:textSize="36sp" />
-
-</LinearLayout>

res/layout/message_view_header.xml

@@ -44,8 +44,7 @@
                         android:textSize="10sp"
                         android:textStyle="bold"
                         android:textColor="?android:attr/textColorSecondary"
-                        android:textAppearance="?android:attr/textAppearanceSmall"
+                        android:textAppearance="?android:attr/textAppearanceSmall"/>
-                        android:visibility="gone"/>
 
                     <!-- From -->
                     <LinearLayout

src/com/fsck/k9/activity/MessageList.java

@@ -49,6 +49,7 @@ import com.fsck.k9.search.SearchSpecification.Attribute;
 import com.fsck.k9.search.SearchSpecification.Searchfield;
 import com.fsck.k9.search.SearchSpecification.SearchCondition;
 import com.fsck.k9.view.MessageHeader;
+import com.fsck.k9.view.MessageTitleView;
 
 import de.cketti.library.changelog.ChangeLog;
 
@@ -139,6 +140,9 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
     private StorageManager.StorageListener mStorageListener = new StorageListenerImplementation();
 
     private ActionBar mActionBar;
+    private View mActionBarMessageList;
+    private View mActionBarMessageView;
+    private MessageTitleView mActionBarSubject;
     private TextView mActionBarTitle;
     private TextView mActionBarSubTitle;
     private TextView mActionBarUnread;
@@ -463,6 +467,9 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
         mActionBar.setCustomView(R.layout.actionbar_custom);
 
         View customView = mActionBar.getCustomView();
+        mActionBarMessageList = customView.findViewById(R.id.actionbar_message_list);
+        mActionBarMessageView = customView.findViewById(R.id.actionbar_message_view);
+        mActionBarSubject = (MessageTitleView) customView.findViewById(R.id.message_title_view);
         mActionBarTitle = (TextView) customView.findViewById(R.id.actionbar_title_first);
         mActionBarSubTitle = (TextView) customView.findViewById(R.id.actionbar_title_sub);
         mActionBarUnread = (TextView) customView.findViewById(R.id.actionbar_unread_count);
@@ -1174,6 +1181,8 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
             ft.remove(mMessageViewFragment);
             mMessageViewFragment = null;
             ft.commit();
+
+            showDefaultTitleView();
         }
     }
 
@@ -1243,7 +1252,9 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
 
     @Override
     public void displayMessageSubject(String subject) {
-        setTitle(subject);
+        if (mDisplayMode == DisplayMode.MESSAGE_VIEW) {
+            mActionBarSubject.setText(subject);
+        }
     }
 
     @Override
@@ -1284,7 +1295,7 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
 
     @Override
     public void messageHeaderViewAvailable(MessageHeader header) {
-        //TODO: implement
+        mActionBarSubject.setMessageHeader(header);
     }
 
     private void showNextMessage() {
@@ -1309,6 +1320,8 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
         mMessageListContainer.setVisibility(View.VISIBLE);
         removeMessageViewFragment();
         mMessageListFragment.setActiveMessage(null);
+
+        showDefaultTitleView();
     }
 
     private void showMessageView() {
@@ -1316,6 +1329,8 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
 
         mMessageListContainer.setVisibility(View.GONE);
         mMessageViewContainer.setVisibility(View.VISIBLE);
+
+        showMessageTitleView();
     }
 
     @Override
@@ -1348,4 +1363,24 @@ public class MessageList extends K9FragmentActivity implements MessageListFragme
 
         restartActivity();
     }
+
+    private void showDefaultTitleView() {
+        mActionBarMessageView.setVisibility(View.GONE);
+        mActionBarMessageList.setVisibility(View.VISIBLE);
+
+        if (mMessageListFragment != null) {
+            mMessageListFragment.updateTitle();
+        }
+
+        mActionBarSubject.setMessageHeader(null);
+    }
+
+    private void showMessageTitleView() {
+        mActionBarMessageList.setVisibility(View.GONE);
+        mActionBarMessageView.setVisibility(View.VISIBLE);
+
+        if (mMessageViewFragment != null) {
+            mMessageViewFragment.updateTitle();
+        }
+    }
 }

src/com/fsck/k9/fragment/MessageListFragment.java

@@ -417,6 +417,12 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
 
     private MessageReference mActiveMessage;
 
+    /**
+     * {@code true} after {@link #onCreate(Bundle)} was executed. Used in {@link #updateTitle()} to
+     * make sure we don't access member variables before initialization is complete.
+     */
+    private boolean mInitialized = false;
+
     /**
      * This class is used to run operations that modify UI elements in the UI thread.
      *
@@ -501,7 +507,7 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
                     break;
                 }
                 case ACTION_REFRESH_TITLE: {
-                    MessageListFragment.this.refreshTitle();
+                    updateTitle();
                     break;
                 }
                 case ACTION_PROGRESS: {
@@ -562,7 +568,11 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
         updateFooterView();
     }
 
-    private void refreshTitle() {
+    public void updateTitle() {
+        if (!mInitialized) {
+            return;
+        }
+
         setWindowTitle();
         if (!mSearch.isManualSearch()) {
             setWindowProgress();
@@ -716,6 +726,8 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
         mCheckboxes = K9.messageListCheckboxes();
 
         decodeArguments();
+
+        mInitialized = true;
     }
 
     @Override
@@ -973,7 +985,7 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
             mController.getFolderUnreadMessageCount(mAccount, mFolderName, mListener);
         }
 
-        refreshTitle();
+        updateTitle();
     }
 
     private void initializePullToRefresh(LayoutInflater inflater, View layout) {
@@ -3148,7 +3160,7 @@ public class MessageListFragment extends SherlockFragment implements OnItemClick
                 if (StringUtils.isNullOrEmpty(mTitle)) {
                    mTitle = getString(R.string.general_no_subject);
                 }
-                refreshTitle();
+                updateTitle();
             } else {
                 //TODO: empty thread view -> return to full message list
             }

src/com/fsck/k9/fragment/MessageViewFragment.java

@@ -791,6 +791,12 @@ public class MessageViewFragment extends SherlockFragment implements OnClickList
                 && mAccount.hasSpamFolder());
     }
 
+    public void updateTitle() {
+        if (mMessage != null) {
+            displayMessageSubject(mMessage.getSubject());
+        }
+    }
+
     public interface MessageViewFragmentListener {
         public void onForward(Message mMessage, PgpData mPgpData);
         public void disableDeleteAction();

src/com/fsck/k9/view/MessageHeader.java

@@ -431,10 +431,7 @@ public class MessageHeader extends ScrollView implements OnClickListener {
         }
     }
 
-    /**
+    public void hideSubjectLine() {
-     * The subject line defaults to GONE.  Make it visible.
+        mSubjectView.setVisibility(GONE);
-     */
-    public void showSubjectLine() {
-        mSubjectView.setVisibility(VISIBLE);
     }
 }

src/com/fsck/k9/view/MessageTitleView.java

@@ -3,16 +3,15 @@ package com.fsck.k9.view;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.util.AttributeSet;
-import android.util.Log;
 import android.widget.TextView;
-import com.fsck.k9.K9;
 
 /**
- * This {@link TextView} is used in the title of the {@link com.fsck.k9.activity.MessageView} ActionBar.
+ * This {@link TextView} is used in the custom view of the {@link com.fsck.k9.activity.MessageList}
- * It'll un-hide the subject line {@link MessageHeader} if it doesn't fit in the ActionBar's title area.
+ * action bar.
+ * It will hide the subject line in {@link MessageHeader} if the subject fits completely into the
+ * action bar's title view.
  */
 public class MessageTitleView extends TextView {
-    private static final String LOG_PREFIX = "MessageTitleView: ";
     private MessageHeader mHeader;
 
     public MessageTitleView(Context context) {
@@ -28,28 +27,17 @@ public class MessageTitleView extends TextView {
     }
 
     /**
-     * Check to see if we need to unhide the subject line in the MessageHeader or not.
+     * Check to see if we need to hide the subject line in {@link MessageHeader} or not.
-     * @param canvas Canvas to draw on.
      */
     @Override
     public void onDraw(Canvas canvas) {
-        if(mHeader != null && getLayout() != null) {
+        if (mHeader != null && getLayout() != null && getLayout().getEllipsisCount(1) == 0) {
-            if(getLayout().getEllipsisCount(1) > 0) {
+            mHeader.hideSubjectLine();
-                if(K9.DEBUG) {
-                    Log.d(K9.LOG_TAG, LOG_PREFIX +
-                        "Subject was truncated; enabling the subject line in the message header.");
-                }
-                mHeader.showSubjectLine();
-            } else {
-                if (K9.DEBUG) {
-                    Log.d(K9.LOG_TAG, LOG_PREFIX + "Subject was fully shown in ActionBar.");
-                }
-            }
         }
         super.onDraw(canvas);
     }
 
     public void setMessageHeader(final MessageHeader header) {
-        this.mHeader = header;
+        mHeader = header;
     }
 }