add initial marp implementation with sample content and build configuration

node_modules/@marp-team/marpit/lib/markdown/comment.js

@@ -0,0 +1,108 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = exports.comment = void 0;
+exports.markAsParsed = markAsParsed;
+var _plugin = _interopRequireDefault(require("../plugin"));
+var _yaml = require("./directives/yaml");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/** @module */
+
+const commentMatcher = /<!--+\s*([\s\S]*?)\s*--+>/;
+const commentMatcherOpening = /^<!--/;
+const commentMatcherClosing = /-->/;
+const magicCommentMatchers = [
+// Prettier
+/^prettier-ignore(-(start|end))?$/,
+// markdownlint
+/^markdownlint-((disable|enable).*|capture|restore)$/,
+// remark-lint (remark-message-control)
+/^lint (disable|enable|ignore).*$/];
+function markAsParsed(token, kind) {
+  token.meta = token.meta || {};
+  token.meta.marpitCommentParsed = kind;
+}
+
+/**
+ * Marpit comment plugin.
+ *
+ * Parse HTML comment as token. Comments will strip regardless of html setting
+ * provided by markdown-it.
+ *
+ * @function comment
+ * @param {MarkdownIt} md markdown-it instance.
+ */
+function _comment(md) {
+  const parse = (token, content) => {
+    const parsed = (0, _yaml.yaml)(content, !!md.marpit.options.looseYAML);
+    token.meta = token.meta || {};
+    token.meta.marpitParsedDirectives = parsed === false ? {} : parsed;
+
+    // Mark well-known magic comments as parsed comment
+    for (const magicCommentMatcher of magicCommentMatchers) {
+      if (magicCommentMatcher.test(content.trim())) {
+        markAsParsed(token, 'well-known-magic-comment');
+        break;
+      }
+    }
+  };
+  md.block.ruler.before('html_block', 'marpit_comment', (state, startLine, endLine, silent) => {
+    // Fast fail
+    let pos = state.bMarks[startLine] + state.tShift[startLine];
+    if (state.src.charCodeAt(pos) !== 0x3c) return false;
+    let max = state.eMarks[startLine];
+    let line = state.src.slice(pos, max);
+
+    // Match to opening element
+    if (!commentMatcherOpening.test(line)) return false;
+    if (silent) return true;
+
+    // Parse ending element
+    let nextLine = startLine + 1;
+    if (!commentMatcherClosing.test(line)) {
+      while (nextLine < endLine) {
+        if (state.sCount[nextLine] < state.blkIndent) break;
+        pos = state.bMarks[nextLine] + state.tShift[nextLine];
+        max = state.eMarks[nextLine];
+        line = state.src.slice(pos, max);
+        nextLine += 1;
+        if (commentMatcherClosing.test(line)) break;
+      }
+    }
+    state.line = nextLine;
+
+    // Create token
+    const token = state.push('marpit_comment', '', 0);
+    token.map = [startLine, nextLine];
+    token.markup = state.getLines(startLine, nextLine, state.blkIndent, true);
+    token.hidden = true;
+    const matchedContent = commentMatcher.exec(token.markup);
+    token.content = matchedContent ? matchedContent[1].trim() : '';
+    parse(token, token.content);
+    return true;
+  });
+  md.inline.ruler.before('html_inline', 'marpit_inline_comment', (state, silent) => {
+    const {
+      posMax,
+      src
+    } = state;
+
+    // Quick fail by checking `<` and `!`
+    if (state.pos + 2 >= posMax || src.charCodeAt(state.pos) !== 0x3c || src.charCodeAt(state.pos + 1) !== 0x21) return false;
+    const match = src.slice(state.pos).match(commentMatcher);
+    if (!match) return false;
+    if (!silent) {
+      const token = state.push('marpit_comment', '', 0);
+      token.hidden = true;
+      token.markup = src.slice(state.pos, state.pos + match[0].length);
+      token.content = match[1].trim();
+      parse(token, token.content);
+    }
+    state.pos += match[0].length;
+    return true;
+  });
+}
+const comment = exports.comment = (0, _plugin.default)(_comment);
+var _default = exports.default = comment;