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OpenLayers draw snapping fixed to avoid cross-bundle projection transform #520

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Merged
dannyleech merged 1 commit into from
Sep 11, 2026
Merged

OpenLayers draw snapping fixed to avoid cross-bundle projection transform #520

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9 changes: 8 additions & 1 deletion plugins/draw/src/adapters/openlayers/snap/snapEngine.js
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,14 @@ const buildTileBoundaryState = (layer, map) => {
const getClipContext = (state, coord) => {
if (!state) { return null }
const { tileGrid, viewProj, sourceProj, zoom } = state
const toSource = (c) => c ? projTransform(c, viewProj, sourceProj) : null
// Same-code projections need no reprojection — skipping the call also avoids depending
// on ol/proj's registry having a transform for the pair, which can be missing when the
// draw plugin and the map provider ship as separate bundles each with their own ol/proj4.
const codeOf = (projection) => (typeof projection === 'string' ? projection : projection.getCode())
const toSource = (coordinate) => {
if (!coordinate) { return null }
return codeOf(sourceProj) === codeOf(viewProj) ? coordinate : projTransform(coordinate, viewProj, sourceProj)
}
const anchor = toSource(coord)
const tileCoord = tileGrid.getTileCoordForCoordAndZ(anchor, zoom)
const extent = tileGrid.getTileCoordExtent(tileCoord)
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