touching mouse-pointer returns false when outside stage

[apple502j]

Resolves

Resolves scratchfoundation/scratch-gui#5243

Proposed Changes

Adds getIsOutside function in io/mouse and uses it inside rendered-target isTouchingObject. If the param is __mouse__ and getIsOutside is true, it returns false.

Reason for Changes

See scratchfoundation/scratch-gui#5243

Test Coverage

Added one test.

[benjiwheeler]

Thanks for adding this test. Could you also please add a test where the sprite is touching the mouse?

[apple502j]

Not sure how to add that test?

[adroitwhiz]

test('isTouchingMouse', t => {
    const r = new Runtime();
    const s = new Sprite(null, r);
    const renderer = new FakeRenderer();
    r.attachRenderer(renderer);
    const a = new RenderedTarget(s, r);
    a.renderer = renderer;
    r.ioDevices.mouse.postData({
        x: 0,
        y: 0
    });
    t.equals(a.isTouchingObject('__mouse__'), true);
    t.end();
});

I think this will work because FakeRenderer.drawableTouching always returns true (haven't tried it though)

[apple502j]

It seems like my Python knowledge is causing issues with underscored special names (see also #2427)

That should fix the test