Populate chatbox when narrowed to stream/pm.

Show it when user narrowed to stream/topic/pm from drawer.
Fills the fields in the chatbox. This saves the time in
composing message.

Fixes #330.

Author: jainkuniya

app/src/main/java/com/zulip/android/activities/RecyclerMessageAdapter.java

@@ -116,8 +116,9 @@ public void onItemClick(int viewId, int position) {
                     case R.id.displayRecipient: //StreamTV
                         MessageHeaderParent messageHeaderParent = (MessageHeaderParent) getItem(position);
                         if (messageHeaderParent.getMessageType() == MessageType.PRIVATE_MESSAGE) {
-                            narrowListener.onNarrow(new NarrowFilterPM(
-                                    Arrays.asList(messageHeaderParent.getRecipients((ZulipApp.get())))));
+                            Person[] recipientArray = messageHeaderParent.getRecipients(zulipApp);
+                            narrowListener.onNarrow(new NarrowFilterPM(Arrays.asList(recipientArray)));
+                            narrowListener.onNarrowFillSendBoxPrivate(recipientArray,false);
                         } else {
 
                             narrowListener.onNarrow(new NarrowFilterStream(Stream.getByName(zulipApp, messageHeaderParent.getStream()), null));
@@ -128,7 +129,7 @@ public void onItemClick(int viewId, int position) {
                         MessageHeaderParent messageParent = (MessageHeaderParent) getItem(position);
                         if (messageParent.getMessageType() == MessageType.STREAM_MESSAGE) {
                             narrowListener.onNarrow(new NarrowFilterStream(Stream.getByName(zulipApp, messageParent.getStream()), messageParent.getSubject()));
-                            narrowListener.onNarrowFillSendBoxStream(messageParent.getStream(), "", false);
+                            narrowListener.onNarrowFillSendBoxStream(messageParent.getStream(), messageParent.getSubject(), false);
                         } else {
                             Person[] recipentArray = messageParent.getRecipients(zulipApp);
                             narrowListener.onNarrow(new NarrowFilterPM(Arrays.asList(recipentArray)));

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -396,7 +396,9 @@ public void onItemClick(AdapterView<?> parent, View view,
                 if (id == allPeopleId) {
                     doNarrow(new NarrowFilterAllPMs(app.getYou()));
                 } else {
-                    narrow_pm_with(Person.getById(app, (int) id));
+                    Person person = Person.getById(app, (int) id);
+                    narrowPMWith(person);
+                    switchToPrivate();
                 }
             }
         });
@@ -569,6 +571,7 @@ public void onBackStackChanged() {
                 if (narrowedList == null) {
                     calendar = Calendar.getInstance();
                     menu.getItem(2).getSubMenu().getItem(0).setTitle(R.string.menu_today);
+                    switchToStream();
                     checkForChatBoxFocusRequest();
                 } else if (narrowedList.filter instanceof NarrowFilterByDate) {
                     menu.getItem(2).getSubMenu().getItem(0).setTitle(R.string.menu_one_day_before);
@@ -578,7 +581,7 @@ public void onBackStackChanged() {
     }
 
     private void checkForChatBoxFocusRequest() {
-        if (TextUtils.isEmpty(streamActv.getText().toString())) {
+        if (TextUtils.isEmpty(streamActv.getText().toString()) && isCurrentModeStream()) {
             streamActv.requestFocus();
         } else if (TextUtils.isEmpty(topicActv.getText().toString())) {
             topicActv.requestFocus();
@@ -1083,6 +1086,7 @@ private void displayChatBox(boolean show) {
             showView(chatBox);
         } else {
             hideView(chatBox);
+            hideSoftKeyBoard();
         }
     }
 
@@ -1203,6 +1207,7 @@ public boolean onGroupClick(ExpandableListView expandableListView, View view, in
                 }
                 expandableListView.expandGroup(position);
                 previousClick = position;
+                onNarrowFillSendBoxStream(streamName, "", false);
                 return true;
             }
         });
@@ -1743,8 +1748,9 @@ protected void narrow(final Stream stream) {
         doNarrow(new NarrowFilterStream(stream, null));
     }
 
-    private void narrow_pm_with(final Person person) {
         doNarrow(new NarrowFilterPM(Arrays.asList(app.getYou(), person)));
+    private void narrowPMWith(final Person person) {
+        onNarrowFillSendBoxPrivate(new Person[]{person},false);
     }
 
     @TargetApi(Build.VERSION_CODES.HONEYCOMB)