Fix videoplayer status after pause&finish

[mmyduckx]

Re: # related PR: cocos/cocos-test-projects#824

Changelog

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Continuous Integration

This pull request:

• needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• does not change any runtime related code or build configuration

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---

Compatibility Check

This pull request:

• changes public API, and have ensured backward compatibility with deprecated features.
• affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• affects file structure of the build package or build configuration which requires user project upgrade.
• introduces breaking changes, please list all changes, affected features and the scope of violation.

[minggo]

There is _ignorePause. I don't quite understand its usage. But from its name, it seems to ignore stop. And if want to ignore stop, then should not change the status?

[mmyduckx]

As you can see, when call stop(), it will set _ignorePause to ture, which is reasonable.
But then it call video.pause() then trigger onPause in web.
Q: Why? It should be call video.stop() then trigger onStop , like on other platform:


A: Because on web, we don't have such video.stop() interface. So, we use pause() instead of stop().

Based on the above, I think we should set _playing to false to make sure, in this condition, the video status is not playing. (obviously, when trigger onPause, _playing status shouldn't be true).
Otherwise, we got wrong isplaying value when click stop in web.

But from its name, it seems to ignore stop. And if want to ignore stop, then should not change the status?

By the way, as far as i'm concerned, _ignorePause is just to prevent to pause repeatly when video already pause or stop and emit extra Event.PAUSE. So it is safe to set _playing = false in advance.

[minggo]

How about add stopped status on web? Then can just remove _ignorePause. The stop implementation may be like this

public stop (): void {
    if (this._status == STOPPED) {
        return;
    }

    this.pause();
    this._status = STOPPED;
    ...
}

[minggo]

And i think only _status variable is needed.

[mmyduckx]

How about add stopped status on web? Then can just remove _ignorePause. The stop implementation may be like this

public stop (): void {
    if (this._status == STOPPED) {
        return;
    }

    this.pause();
    this._status = STOPPED;
    ...
}

Right now , _ignorePause is not only use on web but also on other platform. So I do not recommand change implementation in small version like 3.8.1; In fact, there are other implementations also not reasonable enough. Maybe we can do some refactory work all together later on.

[minggo]

Sounds reasonable.