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fix: prevent marker snap-back during drag via PubSub echo #18

Merged
ryan merged 1 commits from worktree-drag-rate-limit into main 2026-02-21 02:51:40 +00:00
Conversation 0 Commits 1 Files Changed 1 +4 -3
1 changed files with 4 additions and 3 deletions
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7
maplibre/js.go
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@@ -273,7 +273,7 @@ func markerBodyJS(mapID, markerID string, mk Marker) string {
func dragHandlerJS(mapID string, mk Marker) string {
// Shared writeback logic extracted into a local function for both handlers.
return fmt.Sprintf(
`var _raf=0;`+
`var _raf=0;mk._dragging=false;`+
`function _wb(){`+
`var pos=mk.getLngLat();`+
`var el=document.getElementById(%[1]s);if(!el)return;`+
@@ -284,8 +284,9 @@ func dragHandlerJS(mapID string, mk Marker) string {
`if(sig===%[3]s){inp.value=pos.lat;inp.dispatchEvent(new Event('input',{bubbles:true}))}`+
`});`+
`}`+
`mk.on('dragstart',function(){mk._dragging=true;});`+
`mk.on('drag',function(){if(_raf)return;_raf=requestAnimationFrame(function(){_raf=0;_wb()});});`+
`mk.on('dragend',function(){cancelAnimationFrame(_raf);_raf=0;_wb()});`,
`mk.on('dragend',function(){cancelAnimationFrame(_raf);_raf=0;_wb();mk._dragging=false;});`,
jsonStr("_vwrap_"+mapID),
jsonStr(mk.LngSignal.ID()),
jsonStr(mk.LatSignal.ID()),
@@ -321,7 +322,7 @@ func markerEffectExpr(mapID, markerID string, mk Marker) string {
}
b.WriteString(fmt.Sprintf(
`var m=window.__via_maps&&window.__via_maps[%s];`+
`if(m&&m._via_markers[%[2]s]){`+
`if(m&&m._via_markers[%[2]s]&&!m._via_markers[%[2]s]._dragging){`+
`m._via_markers[%[2]s].setLngLat([lng,lat])`,
jsonStr(mapID), jsonStr(markerID)))
if mk.RotationSignal != nil && mk.Element != "" {