When first intalling, users will no longer be presented with the option
to register as a standalone client.
For developer convenience, the standalone form can still be found at
chrome-extension://.../register.html
Closes#159
Only re-render a message if the body changed. Re-render only the
delivery receipt checkmark if the delivered property changes.
Fix a bug where attachments flash in and out of existance when a
delivery receipt arrives.
Define a Whisper.View base class that automatically parses and renders
templates and attributes defined by the subclass. This saves us a good
number of lines of code as well as some marginal memory overhead, since
we are no longer saving per-instance copies of template strings.
Although I find the previous implementation more elegant, it results in
a deeper nesting of Promises than necessary, which can make debugging
more complicated. The canvas scaling and compression apis are actually
synchronous, so the callback structure isn't really recessary here.
Converting to a loop also makes this process easier to understand at
a glance.
Fixed some bugs along the way:
* accidentally scaling small images up to 1920px
* jpeg compressing gifs and other formats even if unnecessary
Previously we would not scale large resolution images with small file
sizes, but in fact, both resolution and file size constraints should be
enforced.
With these changes, message bubbles in the default-sized chat popup are
just wide enough to display the full complement of html5 media player
controls.
Converting attachment data to base64-encoded data uris takes O(n) and
there's no need! URL.createObjectURL returns a magic link that can be
set as the `src` attribute to `img`, `video`, and `audio` tags to load
blob data directly without copying.
https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
Add contentType-specific limits, switch to lazy-init iff we encounter an
oversized file, and restyle as a toast, factoring out a generic
ToastView along the way.
