feat: new function detectRuntimeEnvironment and convertToPixels

application/source/dom/dimension.mjs

+/**
+ * Copyright schukai GmbH and contributors 2023. All Rights Reserved.
+ * Node module: @schukai/monster
+ * This file is licensed under the AGPLv3 License.
+ * License text available at https://www.gnu.org/licenses/agpl-3.0.en.html
+ */
+
+import {getWindow} from './util.mjs';
+
+export {convertToPixels, getDeviceDPI}
+
+
+/**
+ * Stores the DPI of the device.
+ *
+ * @returns {number}
+ * @type {number}
+ */
+let CURRENT_DEVICE_DPI = function () {
+    let i = 0;
+    for (i = 56; i < 2000; i++) {
+        if (getWindow().matchMedia("(max-resolution: " + i + "dpi)").matches === true) {
+            return i;
+        }
+    }
+    return i;
+};
+
+/**
+ * Returns the DPI of the device.
+ *
+ * @returns {number}
+ */
+function getDeviceDPI() {
+    // only call the function once
+    if (typeof CURRENT_DEVICE_DPI === 'function') {
+        CURRENT_DEVICE_DPI = CURRENT_DEVICE_DPI();
+    }
+
+    return getWindow().devicePixelRatio * CURRENT_DEVICE_DPI;
+}
+
+
+/**
+ * Converts a CSS value to pixels.
+ *
+ * As Example:
+ *
+ * ```js
+ * convertToPixels('1em') // returns the current font size in pixels
+ * convertToPixels('1rem') // returns the current root font size in pixels
+ * convertToPixels('1px') // returns 1
+ * convertToPixels('100%') // returns the current width of the parent element in pixels
+ * ```
+ *
+ * Following units are supported:
+ * - px
+ * - em
+ * - rem
+ * - %
+ *
+ * @param value
+ * @param parentElement
+ * @param fontSizeElement
+ * @returns {number}
+ * @license AGPLv3
+ * @since 1.6.0
+ * @copyright schukai GmbH
+ * @memberOf Monster.DOM
+ * @throws {Error} Unsupported unit
+ */
+
+function convertToPixels(value, parentElement = document.documentElement, fontSizeElement = document.documentElement) {
+    const regex = /^([\d.]+)(.*)$/;
+    const [, num, unit] = value.match(regex);
+    const number = parseFloat(num);
+    const dpi = getDeviceDPI();
+
+    if (unit === 'px') {
+        return number;
+    } else if (unit === 'em') {
+        const fontSize = parseFloat(window.getComputedStyle(fontSizeElement).fontSize);
+        return number * fontSize;
+    } else if (unit === 'rem') {
+        const rootFontSize = parseFloat(window.getComputedStyle(parentElement).fontSize);
+        return number * rootFontSize;
+    } else if (unit === '%') {
+        const parentWidth = parseFloat(window.getComputedStyle(parentElement).width);
+        return (number * parentWidth) / 100;
+    } else if (unit === 'in') {
+        return number * dpi;
+    } else if (unit === 'cm') {
+        return (number * dpi) / 2.54;
+    } else if (unit === 'mm') {
+        return (number * dpi) / 25.4;
+    } else if (unit === 'pt') {
+        return (number * dpi) / 72;
+    } else if (unit === 'pc') {
+        return (number * dpi) / 6;
+    } else {
+        throw new Error(`Unsupported unit: ${unit}`);
+    }
+}
+
+

application/source/util/runtime.mjs

+/**
+ * Copyright schukai GmbH and contributors 2023. All Rights Reserved.
+ * Node module: @schukai/monster
+ * This file is licensed under the AGPLv3 License.
+ * License text available at https://www.gnu.org/licenses/agpl-3.0.en.html
+ */
+
+const ENV_AWS_LAMBDA = 'aws-lambda';
+const ENV_GOOGLE_FUNCTIONS = 'google-functions';
+const ENV_ELECTRON = 'electron';
+const ENV_NODE = 'node';
+const ENV_BROWSER = 'browser';
+const ENV_WEB_WORKER = 'web-worker';
+const ENV_DENO = 'deno';
+const ENV_UNKNOWN = 'unknown';
+
+/**
+ * Detects and returns the current runtime environment.
+ * 
+ * - 'aws-lambda': AWS Lambda environment
+ * - 'google-functions': Google Cloud Functions environment
+ * - 'electron': Electron environment
+ * - 'node': Node.js environment
+ * - 'browser': Browser environment
+ * - 'web-worker': Web Worker environment
+ * - 'deno': Deno environment
+ * - 'react-native': React Native environment
+ * - 'unknown': Unknown environment
+ * 
+ * @returns {string} The detected runtime environment. Possible values are:
+ */
+function detectRuntimeEnvironment() {
+    // AWS Lambda environment
+    if (
+        typeof process !== 'undefined' &&
+        process.env != null &&
+        process.env.AWS_LAMBDA_FUNCTION_NAME
+    ) {
+        return ENV_AWS_LAMBDA;
+    }
+
+    // Google Cloud Functions environment
+    if (
+        typeof process !== 'undefined' &&
+        process.env != null &&
+        process.env.FUNCTION_NAME
+    ) {
+        return ENV_GOOGLE_FUNCTIONS;
+    }
+
+    // Node.js environment
+    if (
+        typeof process !== 'undefined' &&
+        process.versions != null &&
+        process.versions.node != null
+    ) {
+        // Electron environment
+        if (process.versions.electron != null) {
+            return ENV_ELECTRON;
+        }
+        return ENV_NODE;
+    }
+
+    // Browser environment
+    if (
+        typeof window !== 'undefined' &&
+        typeof window.document !== 'undefined' &&
+        typeof navigator !== 'undefined' &&
+        typeof navigator.userAgent === 'string'
+    ) {
+        // Web Worker environment
+        if (typeof self === 'object' && typeof importScripts === 'function') {
+            return ENV_WEB_WORKER;
+        }
+        return ENV_BROWSER;
+    }
+
+    // Deno environment
+    if (typeof Deno !== 'undefined') {
+        return ENV_DENO;
+    }
+
+    // Unknown environment
+    return ENV_UNKNOWN;
+}
+
+export {
+    ENV_AWS_LAMBDA,
+    ENV_GOOGLE_FUNCTIONS,
+    ENV_ELECTRON,
+    ENV_NODE,
+    ENV_BROWSER,
+    ENV_WEB_WORKER,
+    ENV_DENO,
+    ENV_UNKNOWN,
+    detectRuntimeEnvironment}
\ No newline at end of file

development/test/cases/dom/assembler.mjs

-'use strict';
-
 import {expect} from "chai"
 
 import {ATTRIBUTEPREFIX, Assembler} from "../../../../application/source/dom/assembler.mjs";

development/test/cases/dom/attributes.mjs

-'use strict';
 
 import {expect} from "chai"
 

development/test/cases/dom/dimension.mjs

+import {expect} from 'chai';
+import {convertToPixels, getDeviceDPI} from "../../../../application/source/dom/dimension.mjs";
+import {getWindow} from "../../../../application/source/dom/util.mjs";
+import {initJSDOM, isBrowser, JSDOMExport as JSDOM} from "../../util/jsdom.mjs";
+import {getGlobal} from "../../../../application/source/types/global.mjs";
+import {detectRuntimeEnvironment} from "../../../../application/source/util/runtime.mjs";
+
+
+function getMockWindow(dpi) {
+
+    if(detectRuntimeEnvironment() === 'browser') {
+        return getWindow();
+    }
+    
+    
+    const dom = new JSDOM('', {
+        pretendToBeVisual: true,
+        resources: 'usable',
+    });
+
+    dom.window.matchMedia = (query) => {
+        const dpiRegex = /\(max-resolution: (\d+)dpi\)/;
+        const match = query.match(dpiRegex);
+
+        if (match) {
+            const maxDpi = parseInt(match[1], 10);
+            return {matches: dpi <= maxDpi};
+        }
+
+        return {matches: false};
+    };
+
+    return dom.window;
+}
+
+describe('dimension', () => {
+    let currentEnvironment;
+
+    before(function (done) {
+        initJSDOM().then(() => {
+            //chaiDom(getDocument());
+            done();
+        });
+    })
+
+    beforeEach(() => {
+
+        const testDpi = 96;
+        const testWindow = getMockWindow(testDpi);
+        getGlobal().window = testWindow;
+
+    });
+
+    afterEach(() => {
+        delete getGlobal().window;
+    });
+
+    describe('convertToPixels', () => {
+        it('should correctly convert px values', () => {
+            const result = convertToPixels('100px');
+            expect(result).to.equal(100);
+        });
+
+        it('should correctly convert em values', () => {
+            const testElement = document.createElement('div');
+            testElement.style.fontSize = '16px';
+            document.body.appendChild(testElement);
+
+            const result = convertToPixels('2em', testElement, testElement);
+            expect(result).to.equal(32);
+
+            document.body.removeChild(testElement);
+        });
+
+        it('should correctly convert rem values', () => {
+            const testElement = document.createElement('div');
+            testElement.style.fontSize = '16px';
+            document.documentElement.appendChild(testElement);
+
+            const result = convertToPixels('2rem', testElement);
+            expect(result).to.equal(32);
+
+            document.documentElement.removeChild(testElement);
+        });
+
+        it('should correctly convert percentage values', () => {
+            const testElement = document.createElement('div');
+            testElement.style.width = '500px';
+            document.body.appendChild(testElement);
+
+            const result = convertToPixels('50%', testElement);
+            expect(result).to.equal(250);
+
+            document.body.removeChild(testElement);
+        });
+
+        it('should throw an error for unsupported units', () => {
+            expect(() => convertToPixels('10unsupportedUnit')).to.throw('Unsupported unit: unsupportedUnit');
+        });
+    });
+
+
+    describe('getDeviceDPI', () => {
+        it('should return the correct device DPI', () => {
+            const testDpi = 96;
+            const testWindow = getMockWindow(testDpi);
+            getGlobal().window = testWindow;
+
+            const deviceDpi = getDeviceDPI();
+            expect(deviceDpi).to.equal(testDpi * testWindow.devicePixelRatio);
+
+            delete getGlobal().window;
+        });
+
+        it('should cache the result and return the same value', () => {
+            const testDpi = 96;
+            const testWindow = getMockWindow(testDpi);
+            getGlobal().window = testWindow;
+
+            const deviceDpi1 = getDeviceDPI();
+            const deviceDpi2 = getDeviceDPI();
+            expect(deviceDpi1).to.equal(deviceDpi2);
+
+            delete getGlobal().window;
+        });
+    });
+
+});
\ No newline at end of file

development/test/util/jsdom.mjs

@@ -6,6 +6,7 @@ import {getGlobal} from "../../../application/source/types/global.mjs";
 export const isBrowser = new Function("try {return this===window;}catch(e){ return false;}");
 export const isNode = new Function("try {return this===global;}catch(e){return false;}");
 
+let JSDOMExport = null;
 
 /**
  * this helper function creates the dom stack in the node environment
@@ -27,6 +28,7 @@ function initJSDOM(options) {
     }, options || {})
 
     return import("jsdom").then(({JSDOM}) => {
+        JSDOMExport = JSDOM;
         const {window} = new JSDOM(`<html>
 <head>
 </head>
@@ -85,5 +87,5 @@ function initJSDOM(options) {
     });
 }
 
-export {initJSDOM}
+export {initJSDOM,JSDOMExport} 
 

development/test/web/import.js

@@ -20,6 +20,7 @@ import "../cases/dom/resource.mjs";
 import "../cases/dom/resourcemanager.mjs";
 import "../cases/dom/util.mjs";
 import "../cases/dom/find.mjs";
+import "../cases/dom/dimension.mjs";
 import "../cases/dom/customelement.mjs";
 import "../cases/dom/attributes.mjs";
 import "../cases/dom/events.mjs";

development/test/web/test.html

@@ -14,8 +14,8 @@
 </head>
 <body>
 <div id="headline" style="display: flex;align-items: center;justify-content: center;flex-direction: column;">
-  <h1 style='margin-bottom: 0.1em;'>Monster 3.32.0</h1>
-  <div id="lastupdate" style='font-size:0.7em'>last update So 26. Mär 17:02:25 CEST 2023</div>
+  <h1 style='margin-bottom: 0.1em;'>Monster 3.33.0</h1>
+  <div id="lastupdate" style='font-size:0.7em'>last update Mo 27. Mär 18:10:51 CEST 2023</div>
 </div>
 <div id="mocks"></div>
 <div id="mocha"></div>