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| goog.provide('ol.VectorImageTile');
goog.require('ol');
goog.require('ol.Tile');
goog.require('ol.TileState');
goog.require('ol.dom');
goog.require('ol.events');
goog.require('ol.extent');
goog.require('ol.events.EventType');
goog.require('ol.featureloader');
/**
* @constructor
* @extends {ol.Tile}
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @param {ol.TileState} state State.
* @param {string} src Data source url.
* @param {ol.format.Feature} format Feature format.
* @param {ol.TileLoadFunctionType} tileLoadFunction Tile load function.
* @param {ol.TileCoord} urlTileCoord Wrapped tile coordinate for source urls.
* @param {ol.TileUrlFunctionType} tileUrlFunction Tile url function.
* @param {ol.tilegrid.TileGrid} sourceTileGrid Tile grid of the source.
* @param {ol.tilegrid.TileGrid} tileGrid Tile grid of the renderer.
* @param {Object.<string,ol.VectorTile>} sourceTiles Source tiles.
* @param {number} pixelRatio Pixel ratio.
* @param {ol.proj.Projection} projection Projection.
* @param {function(new: ol.VectorTile, ol.TileCoord, ol.TileState, string,
* ol.format.Feature, ol.TileLoadFunctionType)} tileClass Class to
* instantiate for source tiles.
* @param {function(this: ol.source.VectorTile, ol.events.Event)} handleTileChange
* Function to call when a source tile's state changes.
*/
ol.VectorImageTile = function(tileCoord, state, src, format, tileLoadFunction,
urlTileCoord, tileUrlFunction, sourceTileGrid, tileGrid, sourceTiles,
pixelRatio, projection, tileClass, handleTileChange) {
ol.Tile.call(this, tileCoord, state);
/**
* @private
* @type {Object.<string, CanvasRenderingContext2D>}
*/
this.context_ = {};
/**
* @private
* @type {ol.FeatureLoader}
*/
this.loader_;
/**
* @private
* @type {Object.<string, ol.TileReplayState>}
*/
this.replayState_ = {};
/**
* @private
* @type {Object.<string,ol.VectorTile>}
*/
this.sourceTiles_ = sourceTiles;
/**
* Keys of source tiles used by this tile. Use with {@link #getTile}.
* @type {Array.<string>}
*/
this.tileKeys = [];
/**
* @type {string}
*/
this.src_ = src;
/**
* @type {ol.TileCoord}
*/
this.wrappedTileCoord = urlTileCoord;
/**
* @type {Array.<ol.EventsKey>}
*/
this.loadListenerKeys_ = [];
/**
* @type {Array.<ol.EventsKey>}
*/
this.sourceTileListenerKeys_ = [];
if (urlTileCoord) {
var extent = tileGrid.getTileCoordExtent(urlTileCoord);
var resolution = tileGrid.getResolution(tileCoord[0]);
var sourceZ = sourceTileGrid.getZForResolution(resolution);
sourceTileGrid.forEachTileCoord(extent, sourceZ, function(sourceTileCoord) {
var sharedExtent = ol.extent.getIntersection(extent,
sourceTileGrid.getTileCoordExtent(sourceTileCoord));
Eif (ol.extent.getWidth(sharedExtent) / resolution >= 0.5 &&
ol.extent.getHeight(sharedExtent) / resolution >= 0.5) {
// only include source tile if overlap is at least 1 pixel
var sourceTileKey = sourceTileCoord.toString();
var sourceTile = sourceTiles[sourceTileKey];
if (!sourceTile) {
var tileUrl = tileUrlFunction(sourceTileCoord, pixelRatio, projection);
sourceTile = sourceTiles[sourceTileKey] = new tileClass(sourceTileCoord,
tileUrl == undefined ? ol.TileState.EMPTY : ol.TileState.IDLE,
tileUrl == undefined ? '' : tileUrl,
format, tileLoadFunction);
this.sourceTileListenerKeys_.push(
ol.events.listen(sourceTile, ol.events.EventType.CHANGE, handleTileChange));
}
sourceTile.consumers++;
this.tileKeys.push(sourceTileKey);
}
}.bind(this));
}
};
ol.inherits(ol.VectorImageTile, ol.Tile);
/**
* @inheritDoc
*/
ol.VectorImageTile.prototype.disposeInternal = function() {
for (var i = 0, ii = this.tileKeys.length; i < ii; ++i) {
var sourceTileKey = this.tileKeys[i];
var sourceTile = this.getTile(sourceTileKey);
sourceTile.consumers--;
Eif (sourceTile.consumers == 0) {
delete this.sourceTiles_[sourceTileKey];
sourceTile.dispose();
}
}
this.tileKeys.length = 0;
this.sourceTiles_ = null;
this.loadListenerKeys_.forEach(ol.events.unlistenByKey);
this.loadListenerKeys_.length = 0;
Iif (this.interimTile) {
this.interimTile.dispose();
}
this.state = ol.TileState.ABORT;
this.changed();
this.sourceTileListenerKeys_.forEach(ol.events.unlistenByKey);
this.sourceTileListenerKeys_.length = 0;
ol.Tile.prototype.disposeInternal.call(this);
};
/**
* @param {ol.layer.Layer} layer Layer.
* @return {CanvasRenderingContext2D} The rendering context.
*/
ol.VectorImageTile.prototype.getContext = function(layer) {
var key = ol.getUid(layer).toString();
if (!(key in this.context_)) {
this.context_[key] = ol.dom.createCanvasContext2D();
}
return this.context_[key];
};
/**
* Get the Canvas for this tile.
* @param {ol.layer.Layer} layer Layer.
* @return {HTMLCanvasElement} Canvas.
*/
ol.VectorImageTile.prototype.getImage = function(layer) {
return this.getReplayState(layer).renderedTileRevision == -1 ?
null : this.getContext(layer).canvas;
};
/**
* @param {ol.layer.Layer} layer Layer.
* @return {ol.TileReplayState} The replay state.
*/
ol.VectorImageTile.prototype.getReplayState = function(layer) {
var key = ol.getUid(layer).toString();
if (!(key in this.replayState_)) {
this.replayState_[key] = {
dirty: false,
renderedRenderOrder: null,
renderedRevision: -1,
renderedTileRevision: -1
};
}
return this.replayState_[key];
};
/**
* @inheritDoc
*/
ol.VectorImageTile.prototype.getKey = function() {
return this.tileKeys.join('/') + '/' + this.src_;
};
/**
* @param {string} tileKey Key (tileCoord) of the source tile.
* @return {ol.VectorTile} Source tile.
*/
ol.VectorImageTile.prototype.getTile = function(tileKey) {
return this.sourceTiles_[tileKey];
};
/**
* @inheritDoc
*/
ol.VectorImageTile.prototype.load = function() {
// Source tiles with LOADED state - we just count them because once they are
// loaded, we're no longer listening to state changes.
var leftToLoad = 0;
// Source tiles with ERROR state - we track them because they can still have
// an ERROR state after another load attempt.
var errorSourceTiles = {};
Eif (this.state == ol.TileState.IDLE) {
this.setState(ol.TileState.LOADING);
}
Eif (this.state == ol.TileState.LOADING) {
this.tileKeys.forEach(function(sourceTileKey) {
var sourceTile = this.getTile(sourceTileKey);
if (sourceTile.state == ol.TileState.IDLE) {
sourceTile.setLoader(this.loader_);
sourceTile.load();
}
if (sourceTile.state == ol.TileState.LOADING) {
var key = ol.events.listen(sourceTile, ol.events.EventType.CHANGE, function(e) {
var state = sourceTile.getState();
if (state == ol.TileState.LOADED ||
state == ol.TileState.ERROR) {
var uid = ol.getUid(sourceTile);
if (state == ol.TileState.ERROR) {
errorSourceTiles[uid] = true;
} else {
--leftToLoad;
delete errorSourceTiles[uid];
}
if (leftToLoad - Object.keys(errorSourceTiles).length == 0) {
this.finishLoading_();
}
}
}.bind(this));
this.loadListenerKeys_.push(key);
++leftToLoad;
}
}.bind(this));
}
if (leftToLoad - Object.keys(errorSourceTiles).length == 0) {
setTimeout(this.finishLoading_.bind(this), 0);
}
};
/**
* @private
*/
ol.VectorImageTile.prototype.finishLoading_ = function() {
var loaded = this.tileKeys.length;
for (var i = loaded - 1; i >= 0; --i) {
var state = this.getTile(this.tileKeys[i]).getState();
if (state != ol.TileState.LOADED) {
--loaded;
}
}
if (loaded == this.tileKeys.length) {
this.loadListenerKeys_.forEach(ol.events.unlistenByKey);
this.loadListenerKeys_.length = 0;
}
this.setState(loaded > 0 ? ol.TileState.LOADED : ol.TileState.EMPTY);
};
/**
* Sets the loader for a tile.
* @param {ol.VectorTile} tile Vector tile.
* @param {string} url URL.
*/
ol.VectorImageTile.defaultLoadFunction = function(tile, url) {
var loader = ol.featureloader.loadFeaturesXhr(
url, tile.getFormat(), tile.onLoad.bind(tile), tile.onError.bind(tile));
tile.setLoader(loader);
};
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