@ngageoint/geopackage
Version:
GeoPackage JavaScript Library
303 lines • 13.2 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.IconCache = void 0;
var canvas_1 = require("../../canvas/canvas");
var imageUtils_1 = require("../../tiles/imageUtils");
/**
* @memberOf module:extension/style
* @class IconCache
*/
/**
* Constructor, created with cache size of {@link #IconCache.DEFAULT_CACHE_SIZE}
* @constructor
*/
var IconCache = /** @class */ (function () {
function IconCache(cacheSize) {
if (cacheSize === void 0) { cacheSize = IconCache.DEFAULT_CACHE_SIZE; }
this.cacheSize = cacheSize;
this.iconCache = {};
this.accessHistory = [];
}
/**
* Get the cached image for the icon row or null if not cached
* @param {module:extension/style.IconRow} iconRow icon row
* @return {Image} icon image or null
*/
IconCache.prototype.getIconForIconRow = function (iconRow) {
return this.get(iconRow.id);
};
/**
* Get the cached image for the icon row id or null if not cached
* @param {Number} iconRowId icon row id
* @return {Image} icon image or null
*/
IconCache.prototype.get = function (iconRowId) {
var image = this.iconCache[iconRowId];
if (image) {
var index = this.accessHistory.indexOf(iconRowId);
if (index > -1) {
this.accessHistory.splice(index, 1);
}
this.accessHistory.push(iconRowId);
}
return image;
};
/**
* Cache the icon image for the icon row
* @param {module:extension/style.IconRow} iconRow icon row
* @param {Image} image icon image
* @return {Image} previous cached icon image or null
*/
IconCache.prototype.putIconForIconRow = function (iconRow, image) {
return this.put(iconRow.id, image);
};
/**
* Cache the icon image for the icon row id
* @param {Number} iconRowId icon row id
* @param {Image} image icon image
* @return {Image} previous cached icon image or null
*/
IconCache.prototype.put = function (iconRowId, image) {
var previous = this.iconCache[iconRowId];
this.iconCache[iconRowId] = image;
if (previous) {
var index = this.accessHistory.indexOf(iconRowId);
if (index > -1) {
this.accessHistory.splice(index, 1);
}
}
this.accessHistory.push(iconRowId);
if (Object.keys(this.iconCache).length > this.cacheSize) {
var iconId = this.accessHistory.shift();
if (iconId) {
var iconToDelete = this.iconCache[iconId];
if (iconToDelete) {
canvas_1.Canvas.disposeImage(iconToDelete);
}
delete this.iconCache[iconId];
}
}
return previous;
};
/**
* Remove the cached image for the icon row, if using CanvasKitCanvasAdapter, dispose of returned image to free up memory using Canvas.dispose(icon.image)
* @param {module:extension/style.IconRow} iconRow icon row
* @return {Image} removed icon image or null
*/
IconCache.prototype.removeIconForIconRow = function (iconRow) {
return this.remove(iconRow.id);
};
/**
* Remove the cached image for the icon row id
* @param {Number} iconRowId icon row id
* @return {Image} removed icon image or null
*/
IconCache.prototype.remove = function (iconRowId) {
var removed = this.iconCache[iconRowId];
delete this.iconCache[iconRowId];
if (removed) {
var index = this.accessHistory.indexOf(iconRowId);
if (index > -1) {
this.accessHistory.splice(index, 1);
}
}
return removed;
};
/**
* Clear the cache
*/
IconCache.prototype.clear = function () {
var _this = this;
Object.keys(this.iconCache).forEach(function (key) {
var icon = _this.iconCache[key];
canvas_1.Canvas.disposeImage(icon);
});
this.iconCache = {};
this.accessHistory = [];
};
/**
* Resize the cache
* @param {Number} maxSize max size
*/
IconCache.prototype.resize = function (maxSize) {
this.cacheSize = maxSize;
var keys = Object.keys(this.iconCache);
if (keys.length > maxSize) {
var numberToRemove = keys.length - maxSize;
for (var i = 0; i < numberToRemove; i++) {
var indexToRemove = this.accessHistory.shift();
var icon = this.iconCache[indexToRemove];
canvas_1.Canvas.disposeImage(icon);
delete this.iconCache[indexToRemove];
}
}
};
/**
* Create or retrieve from cache an icon image for the icon row
* @param {module:extension/style.IconRow} icon icon row
* @return {Promise<Image>} icon image
*/
IconCache.prototype.createIcon = function (icon) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.createAndCacheIcon(icon, this)];
});
});
};
/**
* Create or retrieve from cache an icon image for the icon row
* @param {module:extension/style.IconRow} icon icon row
* @param {Number} scale scale factor
* @return {Promise<Image>} icon image
*/
IconCache.prototype.createScaledIcon = function (icon, scale) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.createAndCacheScaledIcon(icon, scale, this)];
});
});
};
/**
* Create an icon image for the icon row without caching
* @param {module:extension/style.IconRow} icon icon row
* @return {Promise<Image>} icon image
*/
IconCache.prototype.createIconNoCache = function (icon) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.createScaledIconNoCache(icon, 1.0)];
});
});
};
/**
* Create an icon image for the icon row without caching
* @param icon icon row
* @param scale scale factor
* @return {Promise<Image>} icon image
*/
IconCache.prototype.createScaledIconNoCache = function (icon, scale) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.createAndCacheScaledIcon(icon, scale, null)];
});
});
};
/**
* Create or retrieve from cache an icon image for the icon row
* @param {module:extension/style.IconRow} icon icon row
* @param {module:extension/style.IconCache} iconCache icon cache
* @return {Promise<Image>} icon image
*/
IconCache.prototype.createAndCacheIcon = function (icon, iconCache) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.createAndCacheScaledIcon(icon, 1.0, iconCache)];
});
});
};
/**
* Create or retrieve from cache an icon image for the icon row
* @param {module:extension/style.IconRow} icon icon row
* @param {Number} scale scale factor
* @param {module:extension/style.IconCache} iconCache icon cache
* @return {Promise<Image>} icon image
*/
IconCache.prototype.createAndCacheScaledIcon = function (icon, scale, iconCache) {
return __awaiter(this, void 0, void 0, function () {
var iconImage, iconId, e_1, dataWidth, dataHeight, iconWidth, iconHeight, scaleImage, scaledWidth, scaledHeight;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
iconImage = null;
if (!(icon != null)) return [3 /*break*/, 7];
iconId = icon.id;
if (iconCache != null) {
iconImage = iconCache.get(iconId);
}
if (!(iconImage == null)) return [3 /*break*/, 7];
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
return [4 /*yield*/, imageUtils_1.ImageUtils.getImage(icon.data)];
case 2:
iconImage = _a.sent();
return [3 /*break*/, 4];
case 3:
e_1 = _a.sent();
throw new Error('Failed to get the Icon Row image. Id: ' + iconId + ', Name: ' + icon.name);
case 4:
dataWidth = iconImage.width;
dataHeight = iconImage.height;
iconWidth = icon.width;
iconHeight = icon.height;
scaleImage = iconWidth != null || iconHeight != null;
if (!scaleImage && scale != 1.0) {
iconWidth = dataWidth;
iconHeight = dataHeight;
scaleImage = true;
}
if (!scaleImage) return [3 /*break*/, 6];
if (iconWidth == null) {
iconWidth = dataWidth * (iconHeight / dataHeight);
}
else if (iconHeight == null) {
iconHeight = dataHeight * (iconWidth / dataWidth);
}
scaledWidth = Math.round(scale * iconWidth);
scaledHeight = Math.round(scale * iconHeight);
if (!(scaledWidth != dataWidth || scaledHeight != dataHeight)) return [3 /*break*/, 6];
return [4 /*yield*/, imageUtils_1.ImageUtils.scaleImage(iconImage, scaledWidth, scaledHeight)];
case 5:
iconImage = _a.sent();
_a.label = 6;
case 6:
if (iconCache != null) {
iconCache.putIconForIconRow(icon, iconImage);
}
_a.label = 7;
case 7: return [2 /*return*/, iconImage];
}
});
});
};
IconCache.DEFAULT_CACHE_SIZE = 100;
return IconCache;
}());
exports.IconCache = IconCache;
//# sourceMappingURL=iconCache.js.map