The problem:
Configure the account (just an example -- problems can occur in other
configurations as well):
Message Format: HTML
Reply quoting style: Prefix
Quote message when replying: yes
Reply after quoted text: yes
Reply to a message that has a large quantity (20+) of \r\n scattered in
the body of its HTML version (not an unusual scenario).
Add a reply. Save the message as a draft. Go back & open the draft
again. A fatal IndexOutOfBoundsException occurs.
The cause:
When the draft was saved, the X-K9mail-Identity header was computed and
added to the message, then the text of the message was processed with
MimeUtility.fixDraftTextBody, replacing all occurrences of \r\n with \n in
the quoted message before being saved in LocalStore, thus invalidating the
X-K9mail-Identity header.
The fix:
Remove MimeUtility.fixDraftTextBody and implement
MessageCompose$EolConvertingEditText instead. Any message text placed in
an EolConvertingEditText widget is assured to have \n line endings. Any
message text extracted from an EolConvertingEditText widget is assured to
have \r\n line endings. The X-K9mail-Identity header will always be
computed correctly.
Issues thought to be related: 4782, 5010, 5634, 5725
As noted in some of the referenced issues, errors didn't always result in
a fatal exception, but instead with mixed up text.
Ref: commit f9a35aeaee
Originally I wanted to use a Spinner, but it doesn't support multiple
view types (see [1]). Those are necessary because we use different
layouts for accounts (section headers) and identities (selectable list
items).
Removed the ChooseAccount activity because it's now unused.
Issue 30
Provide support for multiple identities. Identities can be managed in
the Account Settings. While composing a message, an identity can be
chosen for sending. Identity information and signature edits are
saved in a header field, so that they survive being synced to the
server and back.
Provide support for editing the quoted text, either for replies or
forwards. The quoted text is immediately editable, in a separate
editor from the main body. When saved in a draft, the two are
contatenated, but the length of the main body is saved with the
identity information, and is used to split the two parts again, when
opening the draft.
