add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/util/StyleList.ts

@@ -0,0 +1,127 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2017-2022 The MathJax Consortium
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/**
+ * @fileoverview  Implements the CssStyles class for handling stylesheets
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+/**
+ * The data for a selector
+ */
+export type StyleData = {
+  [property: string]: string | number;
+};
+
+/**
+ * A list of selectors and their data (basically a stylesheet)
+ */
+export type StyleList = {
+  [selector: string]: StyleData;
+};
+
+/******************************************************************************/
+/**
+ * The CssStyles class (for managing a collection of CSS style definitions)
+ */
+
+export class CssStyles {
+  /**
+   * The styles as they currently stand
+   */
+  protected styles: StyleList = {};
+
+  /**
+   * @return {string}  The styles as a CSS string
+   */
+  get cssText(): string {
+    return this.getStyleString();
+  }
+
+  /**
+   * @param {StyleList} styles  The initial styles to use, if any
+   * @constructor
+   */
+  constructor(styles: StyleList = null) {
+    this.addStyles(styles);
+  }
+
+  /**
+   * @param {StyleList} styles  The styles to combine with the existing ones
+   */
+  public addStyles(styles: StyleList) {
+    if (!styles) return;
+    for (const style of Object.keys(styles)) {
+      if (!this.styles[style]) {
+        this.styles[style] = {};
+      }
+      Object.assign(this.styles[style], styles[style]);
+    }
+  }
+
+  /**
+   * @param {string[]} selectors  The selectors for the styles to remove
+   */
+  public removeStyles(...selectors: string[]) {
+    for (const selector of selectors) {
+      delete this.styles[selector];
+    }
+  }
+
+  /**
+   * Clear all the styles
+   */
+  public clear() {
+    this.styles = {};
+  }
+
+  /**
+   * @return {string} The CSS string for the style list
+   */
+  public getStyleString(): string {
+    return this.getStyleRules().join('\n\n');
+  }
+
+  /**
+   * @return {string[]}  An array of rule strings for the style list
+   */
+  public getStyleRules(): string[] {
+    const selectors = Object.keys(this.styles);
+    const defs: string[] = new Array(selectors.length);
+    let i = 0;
+    for (const selector of selectors) {
+      defs[i++] = selector + ' {\n' + this.getStyleDefString(this.styles[selector]) + '\n}';
+    }
+    return defs;
+  }
+
+  /**
+   * @param {StyleData} styles  The style data to be stringified
+   * @return {string}           The CSS string for the given data
+   */
+  public getStyleDefString(styles: StyleData): string {
+    const properties = Object.keys(styles);
+    const values: string[] = new Array(properties.length);
+    let i = 0;
+    for (const property of properties) {
+      values[i++] = '  ' + property + ': ' + styles[property] + ';';
+    }
+    return values.join('\n');
+  }
+
+}