 Brian Helba
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d90a4569da
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Allow View.adjust* methods to take a null opt_anchor
The methods `View.adjustRotation`, `View.adjustZoom` and `View.adjustResolution`
optionally take an `opt_anchor` parameter. When `opt_anchor` is `undefined`, the
methods work properly. When it is `null`, they currently attempt to access the
`null` value as though it is a `Coordinate` object, and throw:
```
TypeError: Cannot read property '0' of null
```
This change allows `opt_anchor` to safely be `null`.
Existing code paths already expect this to be supported. For example, when
`MouseWheelZoom.useAnchor_` is `false`, then
[`MouseWheelZoom.lastAnchor_` remains `null`](https://github.com/openlayers/openlayers/blob/77bc6897dd4f4dd47d7f6d4dc34fb9d4c5a34a29/src/ol/interaction/MouseWheelZoom.js#L166);
thus, this `null` value
[is passed to `View.adjustZoom` as `opt_anchor`](https://github.com/openlayers/openlayers/blob/77bc6897dd4f4dd47d7f6d4dc34fb9d4c5a34a29/src/ol/interaction/MouseWheelZoom.js#L209).
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2019-11-05 21:30:17 -05:00 |
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