The ScrollView around the WebView caused all sorts of problems. This
change removes the ScrollView and uses the undocumented method
WebView.setEmbeddedTitleBar() to set the MessageHeader view as "title
bar" of the WebView. This allows MessageHeader to scroll away making
more room for the WebView.
All of the "magic title bar" code was originally implemented by Jesse
for Kaiten.
Because WebView doesn't support a scrolling footer we can no longer
support scrolling buttons or attachments at the end of the message. Now
users can switch from message view to attachment view via a button just
below the message headers.
I also copied some code for which I was too lazy to create a separate
commit. It allows to display attachments we didn't use to show by
clicking on a "More..." button in the attachment view. Those
attachments are mostly images referenced by the HTML part (e.g.
background images).
Fixes issue 3291
Make the mTopView a ToggleScrollView. The only consumer is currently the MessageView, which uses a ToggleScrollView anyway. This should make it easier to reuse the anti-scrolling features in ToggleScrollView for ListView later on.
Remove memory leak from referencing MessageView context from the
Intent that is created to go back to MessageList. MessageView is no
longer hardcoded to go back to MessageList, it instead uses an Intent
given at creation to get back to the originating Activity.
Try our best to restore the MessageList in its previous state when
"Manage BACK button" option is enabled:
Since MessageList lives in its own task, we look for the previous
active task and check whether its top activity matches it. If it does,
we just finish MessageView and Android will automatically restore the
previous task. If it doesn't, we launch the originating Intent (and
MessageList state will be lost).
If option is off, we get the regular Android behavior: got back to the
previous screen, whenever it's the MessageList or another application
if the user long-pressed HOME.
The consequence of this is the need for a new permission in order to
check the previous active task: android.permission.GET_TASKS
Fixes downloading attachments (would just fail silently)
Also added a ProgressDialog since progress() just asks for
progress to displayed in the title bar. Since there is no title bar,
no progress is shown at all.
Standard Java serialization is slow on Android. Replacing it w/
parcelable makes it around 10x faster (on a N1, with ~ 500 messages
in the list).
To avoid further confusion and potential bugs MessageReference was
made no longer implement Serializable.
cketti