The code here used to live in hotkey.js. Its complicated calling
protocol made it difficult to unit test. We are also trying to
slim down hotkey.js.
Our arrow navigation for things like `#stream_filters` has always
been kind of awkward, since it's difficult to get the focus to
their list items. This commit does nothing to fix that yet.
* 'd' in message view opens drafts.
This also adds hotkeys within the drafts UI:
* Up/down arrow keys navigate the drafts.
* Pressing enter edits the selected draft.
* Pressing backspace deletes the selected draft.
Some variable names tweaked by tabbott.
This adds an image feed that you can scroll through with hotkeys
in the lightbox.
The left and right arrow keys along with the left and right arrows
will go to the prev/next image, and clicking on an image will also
take a user to that image.
We simplify hotkey mappings by using different hashes for
keydown and keypress events. There are browser bugs (iOS, for
example) where keypress events have the wrong keyCode values.
This led us, under iOS, to interpret "!" as "page up."
This fix also helps us disinguish escape from shift-escape.
Brock Whittaker helped on figuring out the keypress/keydown
issues that are addressed in this commit.
Fixes#4019
The initial version of the tests cover most normal keys, but they
do not cover special keys like enter/tab/escape or arrow keys
or home/end/page-down/page-up yet.
