Show Toast using JavaScript function in WebView

[krmanik]

Pull Request template

Purpose / Description

As sometime it needed to toast in AnkiDroid. This will create native toast of message passed by card developer
This is continuation of #6307

Fixes

Fixes Link to the issues.

Approach

Added signal for calling function
In card.js

ankiShowToast(msg)

How Has This Been Tested?

Tested on emulator,
The function accept string for showing toast message
In front side of card template add it in <script> tag

ankiShowToast("Showing native toast using javascript");

Learning (optional, can help others)

https://developer.android.com/guide/topics/ui/notifiers/toasts

Checklist

Please, go through these checks before submitting the PR.

• [ x ] You have not changed whitespace unnecessarily (it makes diffs hard to read)
• [ x ] You have a descriptive commit message with a short title (first line, max 50 chars).
• [ x ] Your code follows the style of the project (e.g. never omit braces in if statements)
• [ x ] You have commented your code, particularly in hard-to-understand areas
• [ x ] You have performed a self-review of your own code

[krmanik]

This is not much required as using CSS it can be made. But it will be good if there because using one line by passing message can show toast in native way.

[david-allison]

Could you take a look at how the typeans functions handle this, and abstract out/copy their way of handing unicode. It was a little more complex than it initially appeared, I don't think this currently handles Mandarin for example.

[krmanik]

I will update it for other language also.

[krmanik]

Now working for other languages.

[david-allison]

I believe this will break if you enter a single percentage: 100% for example. Could you test this against that case?

[krmanik]

Yes, it break when single % supplied,

[krmanik]

Now working

[david-allison]

One last change, then good to go!

[david-allison]

Looks good to me. Thanks!

[krmanik]

Is it okay to be merged?

[david-allison]

LGTM

[mikehardy]

LGTM as well - thanks @infinyte7