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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 | 9x 9x 9x 9x 9x 13x 13x 13x 13x 13x 10x 10x 10x 10x 10x 20x 20x 20x 20x 20x 20x 6x 6x 6x 5x 18x 18x 18x 9x 9x 9x 8x 9x 5x 5x 9x 6x 1x 5x 6x 6x 6x 6x 1x 1x 1x 1x 4x 5x 6x 6x 10x 10x 6x 5x 8x 8x 8x 8x 3x 3x 9x 9x 9x 9x 9x 9x 9x 9x 1x 1x | import {
Control,
ControlOptions,
DomEvent,
DomUtil,
LatLngBounds,
bounds,
Map,
} from 'leaflet';
import { TileLayerOffline } from './TileLayerOffline';
import {
truncate,
getStorageLength,
downloadTile,
saveTile,
TileInfo,
hasTile,
} from './TileManager';
export interface SaveTileOptions extends ControlOptions {
saveText: string;
rmText: string;
maxZoom: number;
saveWhatYouSee: boolean;
bounds: LatLngBounds | null;
confirm: Function | null;
confirmRemoval: Function | null;
parallel: number;
zoomlevels: number[] | undefined;
alwaysDownload: boolean;
}
export interface SaveStatus {
_tilesforSave: TileInfo[];
storagesize: number;
lengthToBeSaved: number;
lengthSaved: number;
lengthLoaded: number;
}
export class ControlSaveTiles extends Control {
_map!: Map;
_refocusOnMap!: DomEvent.EventHandlerFn;
_baseLayer!: TileLayerOffline;
options: SaveTileOptions;
status: SaveStatus = {
storagesize: 0,
lengthToBeSaved: 0,
lengthSaved: 0,
lengthLoaded: 0,
_tilesforSave: [],
};
constructor(baseLayer: TileLayerOffline, options: Partial<SaveTileOptions>) {
super(options);
this._baseLayer = baseLayer;
this.setStorageSize();
this.options = {
...{
position: 'topleft',
saveText: '+',
rmText: '-',
maxZoom: 19,
saveWhatYouSee: false,
bounds: null,
confirm: null,
confirmRemoval: null,
parallel: 50,
zoomlevels: undefined,
alwaysDownload: true,
},
...options,
};
}
setStorageSize() {
Iif (this.status.storagesize) {
return Promise.resolve(this.status.storagesize);
}
return getStorageLength()
.then((numberOfKeys) => {
this.status.storagesize = numberOfKeys;
this._baseLayer.fire('storagesize', this.status);
return numberOfKeys;
})
.catch(() => 0);
}
getStorageSize(callback: Function) {
this.setStorageSize().then((result) => {
Iif (callback) {
callback(result);
}
});
}
setLayer(layer: TileLayerOffline) {
this._baseLayer = layer;
}
onAdd() {
const container = DomUtil.create('div', 'savetiles leaflet-bar');
const { options } = this;
this._createButton(
options.saveText,
'savetiles',
container,
this._saveTiles,
);
this._createButton(options.rmText, 'rmtiles', container, this._rmTiles);
return container;
}
_createButton(
html: string,
className: string,
container: HTMLElement,
fn: DomEvent.EventHandlerFn,
) {
const link = DomUtil.create('a', className, container);
link.innerHTML = html;
link.href = '#';
link.ariaRoleDescription = 'button';
DomEvent.on(link, 'mousedown dblclick', DomEvent.stopPropagation)
.on(link, 'click', DomEvent.stop)
.on(link, 'click', fn, this)
.on(link, 'click', this._refocusOnMap, this);
return link;
}
_saveTiles() {
const tiles = this._calculateTiles();
this._resetStatus(tiles);
const successCallback = async () => {
this._baseLayer.fire('savestart', this.status);
const loader = async (): Promise<void> => {
const tile = tiles.shift();
if (tile === undefined) {
return Promise.resolve();
}
const blob = await this._loadTile(tile);
if (blob) {
await this._saveTile(tile, blob);
}
return loader();
};
const parallel = Math.min(tiles.length, this.options.parallel);
for (let i = 0; i < parallel; i += 1) {
loader();
}
};
if (this.options.confirm) {
this.options.confirm(this.status, successCallback);
} else {
successCallback();
}
}
_calculateTiles() {
let tiles: TileInfo[] = [];
// minimum zoom to prevent the user from saving the whole world
const minZoom = 5;
// current zoom or zoom options
let zoomlevels = [];
if (this.options.saveWhatYouSee) {
const currentZoom = this._map.getZoom();
Iif (currentZoom < minZoom) {
throw new Error(
`It's not possible to save with zoom below level ${minZoom}.`,
);
}
const { maxZoom } = this.options;
for (let zoom = currentZoom; zoom <= maxZoom; zoom += 1) {
zoomlevels.push(zoom);
}
} else {
zoomlevels = this.options.zoomlevels || [this._map.getZoom()];
}
const latlngBounds = this.options.bounds || this._map.getBounds();
for (let i = 0; i < zoomlevels.length; i += 1) {
const area = bounds(
this._map.project(latlngBounds.getNorthWest(), zoomlevels[i]),
this._map.project(latlngBounds.getSouthEast(), zoomlevels[i]),
);
tiles = tiles.concat(this._baseLayer.getTileUrls(area, zoomlevels[i]));
}
return tiles;
}
_resetStatus(tiles: TileInfo[]) {
this.status = {
lengthLoaded: 0,
lengthToBeSaved: tiles.length,
lengthSaved: 0,
_tilesforSave: tiles,
storagesize: this.status.storagesize,
};
}
async _loadTile(tile: TileInfo) {
let blob;
Iif (
this.options.alwaysDownload === true ||
(await hasTile(tile.key)) === false
) {
blob = await downloadTile(tile.url);
this.status.lengthLoaded += 1;
}
this.status.lengthLoaded += 1;
this._baseLayer.fire('loadtileend', this.status);
Iif (this.status.lengthLoaded === this.status.lengthToBeSaved) {
this._baseLayer.fire('loadend', this.status);
}
return blob;
}
async _saveTile(tile: TileInfo, blob: Blob): Promise<void> {
await saveTile(tile, blob);
this.status.lengthSaved += 1;
this._baseLayer.fire('savetileend', this.status);
if (this.status.lengthSaved === this.status.lengthToBeSaved) {
this._baseLayer.fire('saveend', this.status);
this.setStorageSize();
}
}
_rmTiles() {
const successCallback = () => {
truncate().then(() => {
this.status.storagesize = 0;
this._baseLayer.fire('tilesremoved');
this._baseLayer.fire('storagesize', this.status);
});
};
Iif (this.options.confirmRemoval) {
this.options.confirmRemoval(this.status, successCallback);
} else {
successCallback();
}
}
}
export function savetiles(
baseLayer: TileLayerOffline,
options: Partial<SaveTileOptions>,
) {
return new ControlSaveTiles(baseLayer, options);
}
/** @ts-ignore */
if (window.L) {
/** @ts-ignore */
window.L.control.savetiles = savetiles;
}
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