Cancellable data/tile loading - Githubissues

maplibre / maplibre-rs

Experimental Maps for Web, Mobile and Desktop

Apache License 2.0

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Cancellable data/tile loading #217

Open maxammann opened 1 year ago

maxammann commented 1 year ago

maplibre-rs should be able to cancel data or tile requests after starting them.

🤔 Expected Behavior

If the user scrolls into some area then the tiles get loaded. If the user navigates away then pending requests should be cancelled.

😯 Current Behavior

Currently we have kind a work queue, which gets processed in the order of submission. No cancellation possible.

💁 Possible Solution

There are two major parts in order to support cancellation for tiles:

Cancellable tessellation (~200ms)
Cancellable tile fetching (~100ms, but depends on connection speed)

🔦 Context

On web this is relevant: https://developer.mozilla.org/en-US/docs/Web/API/AbortController
On non-web targets we are currently using reqwest which hopefully support abortion/cancellation.

We might switch to reqwest for the web target if it supports cancellation on all platforms.

💻 Examples

Does not apply.