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Always go through source tile change logic

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This commit is contained in:
ahocevar
2019-08-18 11:38:46 +02:00
parent 25c8d93eba
commit a5fbbef970
1 changed files with 66 additions and 62 deletions
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128
src/ol/source/VectorTile.js
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@@ -200,74 +200,78 @@ class VectorTile extends UrlTile {
const minZoom = sourceTileGrid.getMinZoom();
const previousSourceTiles = this.sourceTilesByTileKey_[tile.getKey()];
let sourceTiles, covered, empty, loadedZ;
if (previousSourceTiles && previousSourceTiles.length > 0 && previousSourceTiles[0].tileCoord[0] === sourceZ) {
return previousSourceTiles;
}
const sourceTiles = [];
let loadedZ = sourceZ + 1;
let covered, empty;
do {
--loadedZ;
sourceTiles = previousSourceTiles;
covered = true;
empty = true;
sourceTileGrid.forEachTileCoord(extent, loadedZ, function(sourceTileCoord) {
const coordKey = getKey(sourceTileCoord);
let sourceTile;
if (coordKey in this.sourceTileByCoordKey_) {
sourceTile = this.sourceTileByCoordKey_[coordKey];
const state = sourceTile.getState();
if (state === TileState.LOADED || state === TileState.ERROR || state === TileState.EMPTY) {
empty = empty && state === TileState.EMPTY;
sourceTiles.push(sourceTile);
empty = false;
loadedZ = sourceZ;
} else {
sourceTiles = [];
loadedZ = sourceZ + 1;
do {
--loadedZ;
covered = true;
empty = true;
sourceTileGrid.forEachTileCoord(extent, loadedZ, function(sourceTileCoord) {
const coordKey = getKey(sourceTileCoord);
let sourceTile;
if (coordKey in this.sourceTileByCoordKey_) {
sourceTile = this.sourceTileByCoordKey_[coordKey];
const state = sourceTile.getState();
if (state === TileState.LOADED || state === TileState.ERROR || state === TileState.EMPTY) {
empty = empty && state === TileState.EMPTY;
sourceTiles.push(sourceTile);
return;
}
} else if (loadedZ === sourceZ) {
const tileUrl = this.tileUrlFunction(sourceTileCoord, pixelRatio, projection);
if (tileUrl !== undefined) {
sourceTile = new this.tileClass(sourceTileCoord, TileState.IDLE, tileUrl,
this.format_, this.tileLoadFunction);
sourceTile.extent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);
sourceTile.projection = projection;
sourceTile.resolution = sourceTileGrid.getResolution(sourceTileCoord[0]);
this.sourceTileByCoordKey_[coordKey] = sourceTile;
empty = false;
listen(sourceTile, EventType.CHANGE, this.handleTileChange, this);
sourceTile.load();
}
} else {
empty = false;
}
covered = false;
if (!sourceTile) {
return;
}
} else if (loadedZ === sourceZ) {
const tileUrl = this.tileUrlFunction(sourceTileCoord, pixelRatio, projection);
if (tileUrl !== undefined) {
sourceTile = new this.tileClass(sourceTileCoord, TileState.IDLE, tileUrl,
this.format_, this.tileLoadFunction);
sourceTile.extent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);
sourceTile.projection = projection;
sourceTile.resolution = sourceTileGrid.getResolution(sourceTileCoord[0]);
this.sourceTileByCoordKey_[coordKey] = sourceTile;
empty = false;
listen(sourceTile, EventType.CHANGE, this.handleTileChange, this);
sourceTile.load();
if (sourceTile.getState() !== TileState.EMPTY && tile.getState() === TileState.IDLE) {
tile.loadingSourceTiles++;
const key = listen(sourceTile, EventType.CHANGE, function() {
const state = sourceTile.getState();
const sourceTileKey = sourceTile.getKey();
if (state === TileState.LOADED || state === TileState.ERROR) {
if (state === TileState.LOADED) {
unlistenByKey(key);
tile.loadingSourceTiles--;
delete tile.errorSourceTileKeys[sourceTileKey];
} else if (state === TileState.ERROR) {
tile.errorSourceTileKeys[sourceTileKey] = true;
}
if (tile.loadingSourceTiles - Object.keys(tile.errorSourceTileKeys).length === 0) {
tile.hifi = true;
tile.sourceZ = sourceZ;
tile.setState(isEmpty(tile.errorSourceTileKeys) ? TileState.LOADED : TileState.ERROR);
}
}
});
}
} else {
empty = false;
}.bind(this));
if (!covered) {
sourceTiles.length = 0;
}
covered = false;
if (!sourceTile) {
return;
}
if (sourceTile.getState() !== TileState.EMPTY && tile.getState() === TileState.IDLE) {
tile.loadingSourceTiles++;
const key = listen(sourceTile, EventType.CHANGE, function() {
const state = sourceTile.getState();
const sourceTileKey = sourceTile.getKey();
if (state === TileState.LOADED || state === TileState.ERROR) {
if (state === TileState.LOADED) {
unlistenByKey(key);
tile.loadingSourceTiles--;
delete tile.errorSourceTileKeys[sourceTileKey];
} else if (state === TileState.ERROR) {
tile.errorSourceTileKeys[sourceTileKey] = true;
}
if (tile.loadingSourceTiles - Object.keys(tile.errorSourceTileKeys).length === 0) {
tile.hifi = true;
tile.sourceZ = sourceZ;
tile.setState(isEmpty(tile.errorSourceTileKeys) ? TileState.LOADED : TileState.ERROR);
}
}
});
}
}.bind(this));
if (!covered) {
sourceTiles.length = 0;
}
} while (!covered && loadedZ > minZoom);
} while (!covered && loadedZ > minZoom);
}
if (!empty && tile.getState() === TileState.IDLE) {
tile.setState(TileState.LOADING);
}