add hw2

node_modules/katex/dist/contrib/auto-render.mjs

@@ -0,0 +1,244 @@
+import katex from '../katex.mjs';
+
+/* eslint no-constant-condition:0 */
+var findEndOfMath = function findEndOfMath(delimiter, text, startIndex) {
+  // Adapted from
+  // https://github.com/Khan/perseus/blob/master/src/perseus-markdown.jsx
+  var index = startIndex;
+  var braceLevel = 0;
+  var delimLength = delimiter.length;
+
+  while (index < text.length) {
+    var character = text[index];
+
+    if (braceLevel <= 0 && text.slice(index, index + delimLength) === delimiter) {
+      return index;
+    } else if (character === "\\") {
+      index++;
+    } else if (character === "{") {
+      braceLevel++;
+    } else if (character === "}") {
+      braceLevel--;
+    }
+
+    index++;
+  }
+
+  return -1;
+};
+
+var escapeRegex = function escapeRegex(string) {
+  return string.replace(/[-/\\^$*+?.()|[\]{}]/g, "\\$&");
+};
+
+var amsRegex = /^\\begin{/;
+
+var splitAtDelimiters = function splitAtDelimiters(text, delimiters) {
+  var index;
+  var data = [];
+  var regexLeft = new RegExp("(" + delimiters.map(x => escapeRegex(x.left)).join("|") + ")");
+
+  while (true) {
+    index = text.search(regexLeft);
+
+    if (index === -1) {
+      break;
+    }
+
+    if (index > 0) {
+      data.push({
+        type: "text",
+        data: text.slice(0, index)
+      });
+      text = text.slice(index); // now text starts with delimiter
+    } // ... so this always succeeds:
+
+
+    var i = delimiters.findIndex(delim => text.startsWith(delim.left));
+    index = findEndOfMath(delimiters[i].right, text, delimiters[i].left.length);
+
+    if (index === -1) {
+      break;
+    }
+
+    var rawData = text.slice(0, index + delimiters[i].right.length);
+    var math = amsRegex.test(rawData) ? rawData : text.slice(delimiters[i].left.length, index);
+    data.push({
+      type: "math",
+      data: math,
+      rawData,
+      display: delimiters[i].display
+    });
+    text = text.slice(index + delimiters[i].right.length);
+  }
+
+  if (text !== "") {
+    data.push({
+      type: "text",
+      data: text
+    });
+  }
+
+  return data;
+};
+
+/* eslint no-console:0 */
+/* Note: optionsCopy is mutated by this method. If it is ever exposed in the
+ * API, we should copy it before mutating.
+ */
+
+var renderMathInText = function renderMathInText(text, optionsCopy) {
+  var data = splitAtDelimiters(text, optionsCopy.delimiters);
+
+  if (data.length === 1 && data[0].type === 'text') {
+    // There is no formula in the text.
+    // Let's return null which means there is no need to replace
+    // the current text node with a new one.
+    return null;
+  }
+
+  var fragment = document.createDocumentFragment();
+
+  for (var i = 0; i < data.length; i++) {
+    if (data[i].type === "text") {
+      fragment.appendChild(document.createTextNode(data[i].data));
+    } else {
+      var span = document.createElement("span");
+      var math = data[i].data; // Override any display mode defined in the settings with that
+      // defined by the text itself
+
+      optionsCopy.displayMode = data[i].display;
+
+      try {
+        if (optionsCopy.preProcess) {
+          math = optionsCopy.preProcess(math);
+        }
+
+        katex.render(math, span, optionsCopy);
+      } catch (e) {
+        if (!(e instanceof katex.ParseError)) {
+          throw e;
+        }
+
+        optionsCopy.errorCallback("KaTeX auto-render: Failed to parse `" + data[i].data + "` with ", e);
+        fragment.appendChild(document.createTextNode(data[i].rawData));
+        continue;
+      }
+
+      fragment.appendChild(span);
+    }
+  }
+
+  return fragment;
+};
+
+var renderElem = function renderElem(elem, optionsCopy) {
+  for (var i = 0; i < elem.childNodes.length; i++) {
+    var childNode = elem.childNodes[i];
+
+    if (childNode.nodeType === 3) {
+      // Text node
+      // Concatenate all sibling text nodes.
+      // Webkit browsers split very large text nodes into smaller ones,
+      // so the delimiters may be split across different nodes.
+      var textContentConcat = childNode.textContent;
+      var sibling = childNode.nextSibling;
+      var nSiblings = 0;
+
+      while (sibling && sibling.nodeType === Node.TEXT_NODE) {
+        textContentConcat += sibling.textContent;
+        sibling = sibling.nextSibling;
+        nSiblings++;
+      }
+
+      var frag = renderMathInText(textContentConcat, optionsCopy);
+
+      if (frag) {
+        // Remove extra text nodes
+        for (var j = 0; j < nSiblings; j++) {
+          childNode.nextSibling.remove();
+        }
+
+        i += frag.childNodes.length - 1;
+        elem.replaceChild(frag, childNode);
+      } else {
+        // If the concatenated text does not contain math
+        // the siblings will not either
+        i += nSiblings;
+      }
+    } else if (childNode.nodeType === 1) {
+      (function () {
+        // Element node
+        var className = ' ' + childNode.className + ' ';
+        var shouldRender = optionsCopy.ignoredTags.indexOf(childNode.nodeName.toLowerCase()) === -1 && optionsCopy.ignoredClasses.every(x => className.indexOf(' ' + x + ' ') === -1);
+
+        if (shouldRender) {
+          renderElem(childNode, optionsCopy);
+        }
+      })();
+    } // Otherwise, it's something else, and ignore it.
+
+  }
+};
+
+var renderMathInElement = function renderMathInElement(elem, options) {
+  if (!elem) {
+    throw new Error("No element provided to render");
+  }
+
+  var optionsCopy = {}; // Object.assign(optionsCopy, option)
+
+  for (var option in options) {
+    if (options.hasOwnProperty(option)) {
+      optionsCopy[option] = options[option];
+    }
+  } // default options
+
+
+  optionsCopy.delimiters = optionsCopy.delimiters || [{
+    left: "$$",
+    right: "$$",
+    display: true
+  }, {
+    left: "\\(",
+    right: "\\)",
+    display: false
+  }, // LaTeX uses $…$, but it ruins the display of normal `$` in text:
+  // {left: "$", right: "$", display: false},
+  // $ must come after $$
+  // Render AMS environments even if outside $$…$$ delimiters.
+  {
+    left: "\\begin{equation}",
+    right: "\\end{equation}",
+    display: true
+  }, {
+    left: "\\begin{align}",
+    right: "\\end{align}",
+    display: true
+  }, {
+    left: "\\begin{alignat}",
+    right: "\\end{alignat}",
+    display: true
+  }, {
+    left: "\\begin{gather}",
+    right: "\\end{gather}",
+    display: true
+  }, {
+    left: "\\begin{CD}",
+    right: "\\end{CD}",
+    display: true
+  }, {
+    left: "\\[",
+    right: "\\]",
+    display: true
+  }];
+  optionsCopy.ignoredTags = optionsCopy.ignoredTags || ["script", "noscript", "style", "textarea", "pre", "code", "option"];
+  optionsCopy.ignoredClasses = optionsCopy.ignoredClasses || [];
+  optionsCopy.errorCallback = optionsCopy.errorCallback || console.error; // Enable sharing of global macros defined via `\gdef` between different
+  // math elements within a single call to `renderMathInElement`.
+
+  optionsCopy.macros = optionsCopy.macros || {};
+  renderElem(elem, optionsCopy);
+};
+
+export { renderMathInElement as default };