Add builtin emoji support

[Foo-Manroot]

Before this series of commits, the emojis shown on the device where vendor-specific and relied on the keyboard to be inserted. Now, there's an integrated popup where one can insert emojis. Also, the displayed emojis are changed, as shown on the image:

The library that I used was vannkitec's, but some changes were needed to integrate it on this project, so I made a couple of modifications for that purpose. Until the new build is released, those changes are only available on the snapshot.

The emojis used are the ones from emoji-one for personal reasons (those were the ones I liked the most); but it can be changed easily modifying the dependency.

For more discussion about the need for built-in emoji support, refer to #819

I tried to follow the contribution guides; but I may have missed something. In that case, I'd appreciate some comments and I'll try to fix whatever problem there may be.

Signed-off-by: Foo-Manroot miguel.garciamartin@edu.uah.es

[bmarty]

Hi @Foo-Manroot ,

Thanks for the PR. Contribution guide has been followed :) . We will discuss internally to decide if we can merge it. Do you know what can be the impacts on the other client (iOS/Web) when emojis are sent?

Benoît

[Foo-Manroot]

This is just an aesthetic change, as the message is the same. It just differs on its presentation to the user. On riot-desktop there's already a builtin emoji set (incidentally, the same set as the one I used, from EmojiOne), so they're viewed exactly the same.

As per other clients, they'll still see the emojis exactly the same as they've until now. For example, this is a comparative of this app before this pull request (the latest version on F-Droid), this app after the PR and Riot-desktop:

Before PR	After PR	Desktop

(the background colour of the second image is black because I had the two apps installed, and I wanted to distinguish between them... :D)

As I say, on the rest of clients the emojis will appear as always has been.

[progserega]

When users use android-riot app - they see emoji from android.
They are often better then on a PC.
If we are remove this "feature" and all emoji will be such as PC - this is will bad for users.

Compare emoji:

This is ugly (riot-pc):

This is not bad (riot-android) (for samsung smartphones it is more nicely, then clear android):

Very nicely (telegram):

Default emoji in riot is ugly.
This is not a problem for geeks and hackers - they are use textual smiles such :-) and :), :(
But it is major for any other girls and womans.
We do not want the matrix to use only geeks? I think We want, that matrix will use many many people. :-)

I sink, that it is good patch, but before apply this patch, we need replace default emoji. And then, all emoji will be some on all devices and they will be nice.

[Foo-Manroot]

I... don't really know what's your point, @progserega; but I think there has been a consensus over at #android:matrix.org about giving the option to use these new font or the default one through configuration.

Right now I'm quite busy and I don't think I may be able to take a look at it in a while, but I encourage anyone to try to implement this as configurable feature.

[progserega]

ok