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media/vendor/codemirror/js/codemirror-lang-markdown.js

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+import { EditorSelection, countColumn, Prec, EditorState } from '@codemirror/state';
+import { keymap } from '@codemirror/view';
+import { syntaxTree, LanguageSupport, Language, indentUnit, defineLanguageFacet, foldNodeProp, indentNodeProp, languageDataProp, foldService, LanguageDescription, ParseContext } from '@codemirror/language';
+import { CompletionContext } from '@codemirror/autocomplete';
+import { MarkdownParser, parseCode, parser, GFM, Subscript, Superscript, Emoji } from '@lezer/markdown';
+import { htmlCompletionSource, html } from '@codemirror/lang-html';
+import { NodeProp } from '@lezer/common';
+
+const data = /*@__PURE__*/defineLanguageFacet({ commentTokens: { block: { open: "<!--", close: "-->" } } });
+const headingProp = /*@__PURE__*/new NodeProp();
+const commonmark = /*@__PURE__*/parser.configure({
+    props: [
+        /*@__PURE__*/foldNodeProp.add(type => {
+            return !type.is("Block") || type.is("Document") || isHeading(type) != null || isList(type) ? undefined
+                : (tree, state) => ({ from: state.doc.lineAt(tree.from).to, to: tree.to });
+        }),
+        /*@__PURE__*/headingProp.add(isHeading),
+        /*@__PURE__*/indentNodeProp.add({
+            Document: () => null
+        }),
+        /*@__PURE__*/languageDataProp.add({
+            Document: data
+        })
+    ]
+});
+function isHeading(type) {
+    let match = /^(?:ATX|Setext)Heading(\d)$/.exec(type.name);
+    return match ? +match[1] : undefined;
+}
+function isList(type) {
+    return type.name == "OrderedList" || type.name == "BulletList";
+}
+function findSectionEnd(headerNode, level) {
+    let last = headerNode;
+    for (;;) {
+        let next = last.nextSibling, heading;
+        if (!next || (heading = isHeading(next.type)) != null && heading <= level)
+            break;
+        last = next;
+    }
+    return last.to;
+}
+const headerIndent = /*@__PURE__*/foldService.of((state, start, end) => {
+    for (let node = syntaxTree(state).resolveInner(end, -1); node; node = node.parent) {
+        if (node.from < start)
+            break;
+        let heading = node.type.prop(headingProp);
+        if (heading == null)
+            continue;
+        let upto = findSectionEnd(node, heading);
+        if (upto > end)
+            return { from: end, to: upto };
+    }
+    return null;
+});
+function mkLang(parser) {
+    return new Language(data, parser, [headerIndent], "markdown");
+}
+/**
+Language support for strict CommonMark.
+*/
+const commonmarkLanguage = /*@__PURE__*/mkLang(commonmark);
+const extended = /*@__PURE__*/commonmark.configure([GFM, Subscript, Superscript, Emoji, {
+        props: [
+            /*@__PURE__*/foldNodeProp.add({
+                Table: (tree, state) => ({ from: state.doc.lineAt(tree.from).to, to: tree.to })
+            })
+        ]
+    }]);
+/**
+Language support for [GFM](https://github.github.com/gfm/) plus
+subscript, superscript, and emoji syntax.
+*/
+const markdownLanguage = /*@__PURE__*/mkLang(extended);
+function getCodeParser(languages, defaultLanguage) {
+    return (info) => {
+        if (info && languages) {
+            let found = null;
+            // Strip anything after whitespace
+            info = /\S*/.exec(info)[0];
+            if (typeof languages == "function")
+                found = languages(info);
+            else
+                found = LanguageDescription.matchLanguageName(languages, info, true);
+            if (found instanceof LanguageDescription)
+                return found.support ? found.support.language.parser : ParseContext.getSkippingParser(found.load());
+            else if (found)
+                return found.parser;
+        }
+        return defaultLanguage ? defaultLanguage.parser : null;
+    };
+}
+
+class Context {
+    constructor(node, from, to, spaceBefore, spaceAfter, type, item) {
+        this.node = node;
+        this.from = from;
+        this.to = to;
+        this.spaceBefore = spaceBefore;
+        this.spaceAfter = spaceAfter;
+        this.type = type;
+        this.item = item;
+    }
+    blank(maxWidth, trailing = true) {
+        let result = this.spaceBefore + (this.node.name == "Blockquote" ? ">" : "");
+        if (maxWidth != null) {
+            while (result.length < maxWidth)
+                result += " ";
+            return result;
+        }
+        else {
+            for (let i = this.to - this.from - result.length - this.spaceAfter.length; i > 0; i--)
+                result += " ";
+            return result + (trailing ? this.spaceAfter : "");
+        }
+    }
+    marker(doc, add) {
+        let number = this.node.name == "OrderedList" ? String((+itemNumber(this.item, doc)[2] + add)) : "";
+        return this.spaceBefore + number + this.type + this.spaceAfter;
+    }
+}
+function getContext(node, doc) {
+    let nodes = [];
+    for (let cur = node; cur && cur.name != "Document"; cur = cur.parent) {
+        if (cur.name == "ListItem" || cur.name == "Blockquote" || cur.name == "FencedCode")
+            nodes.push(cur);
+    }
+    let context = [];
+    for (let i = nodes.length - 1; i >= 0; i--) {
+        let node = nodes[i], match;
+        let line = doc.lineAt(node.from), startPos = node.from - line.from;
+        if (node.name == "FencedCode") {
+            context.push(new Context(node, startPos, startPos, "", "", "", null));
+        }
+        else if (node.name == "Blockquote" && (match = /^ *>( ?)/.exec(line.text.slice(startPos)))) {
+            context.push(new Context(node, startPos, startPos + match[0].length, "", match[1], ">", null));
+        }
+        else if (node.name == "ListItem" && node.parent.name == "OrderedList" &&
+            (match = /^( *)\d+([.)])( *)/.exec(line.text.slice(startPos)))) {
+            let after = match[3], len = match[0].length;
+            if (after.length >= 4) {
+                after = after.slice(0, after.length - 4);
+                len -= 4;
+            }
+            context.push(new Context(node.parent, startPos, startPos + len, match[1], after, match[2], node));
+        }
+        else if (node.name == "ListItem" && node.parent.name == "BulletList" &&
+            (match = /^( *)([-+*])( {1,4}\[[ xX]\])?( +)/.exec(line.text.slice(startPos)))) {
+            let after = match[4], len = match[0].length;
+            if (after.length > 4) {
+                after = after.slice(0, after.length - 4);
+                len -= 4;
+            }
+            let type = match[2];
+            if (match[3])
+                type += match[3].replace(/[xX]/, ' ');
+            context.push(new Context(node.parent, startPos, startPos + len, match[1], after, type, node));
+        }
+    }
+    return context;
+}
+function itemNumber(item, doc) {
+    return /^(\s*)(\d+)(?=[.)])/.exec(doc.sliceString(item.from, item.from + 10));
+}
+function renumberList(after, doc, changes, offset = 0) {
+    for (let prev = -1, node = after;;) {
+        if (node.name == "ListItem") {
+            let m = itemNumber(node, doc);
+            let number = +m[2];
+            if (prev >= 0) {
+                if (number != prev + 1)
+                    return;
+                changes.push({ from: node.from + m[1].length, to: node.from + m[0].length, insert: String(prev + 2 + offset) });
+            }
+            prev = number;
+        }
+        let next = node.nextSibling;
+        if (!next)
+            break;
+        node = next;
+    }
+}
+function normalizeIndent(content, state) {
+    let blank = /^[ \t]*/.exec(content)[0].length;
+    if (!blank || state.facet(indentUnit) != "\t")
+        return content;
+    let col = countColumn(content, 4, blank);
+    let space = "";
+    for (let i = col; i > 0;) {
+        if (i >= 4) {
+            space += "\t";
+            i -= 4;
+        }
+        else {
+            space += " ";
+            i--;
+        }
+    }
+    return space + content.slice(blank);
+}
+/**
+This command, when invoked in Markdown context with cursor
+selection(s), will create a new line with the markup for
+blockquotes and lists that were active on the old line. If the
+cursor was directly after the end of the markup for the old line,
+trailing whitespace and list markers are removed from that line.
+
+The command does nothing in non-Markdown context, so it should
+not be used as the only binding for Enter (even in a Markdown
+document, HTML and code regions might use a different language).
+*/
+const insertNewlineContinueMarkup = ({ state, dispatch }) => {
+    let tree = syntaxTree(state), { doc } = state;
+    let dont = null, changes = state.changeByRange(range => {
+        if (!range.empty || !markdownLanguage.isActiveAt(state, range.from))
+            return dont = { range };
+        let pos = range.from, line = doc.lineAt(pos);
+        let context = getContext(tree.resolveInner(pos, -1), doc);
+        while (context.length && context[context.length - 1].from > pos - line.from)
+            context.pop();
+        if (!context.length)
+            return dont = { range };
+        let inner = context[context.length - 1];
+        if (inner.to - inner.spaceAfter.length > pos - line.from)
+            return dont = { range };
+        let emptyLine = pos >= (inner.to - inner.spaceAfter.length) && !/\S/.test(line.text.slice(inner.to));
+        // Empty line in list
+        if (inner.item && emptyLine) {
+            let first = inner.node.firstChild, second = inner.node.getChild("ListItem", "ListItem");
+            // Not second item or blank line before: delete a level of markup
+            if (first.to >= pos || second && second.to < pos ||
+                line.from > 0 && !/[^\s>]/.test(doc.lineAt(line.from - 1).text)) {
+                let next = context.length > 1 ? context[context.length - 2] : null;
+                let delTo, insert = "";
+                if (next && next.item) { // Re-add marker for the list at the next level
+                    delTo = line.from + next.from;
+                    insert = next.marker(doc, 1);
+                }
+                else {
+                    delTo = line.from + (next ? next.to : 0);
+                }
+                let changes = [{ from: delTo, to: pos, insert }];
+                if (inner.node.name == "OrderedList")
+                    renumberList(inner.item, doc, changes, -2);
+                if (next && next.node.name == "OrderedList")
+                    renumberList(next.item, doc, changes);
+                return { range: EditorSelection.cursor(delTo + insert.length), changes };
+            }
+            else { // Move second item down, making tight two-item list non-tight
+                let insert = blankLine(context, state, line);
+                return { range: EditorSelection.cursor(pos + insert.length + 1),
+                    changes: { from: line.from, insert: insert + state.lineBreak } };
+            }
+        }
+        if (inner.node.name == "Blockquote" && emptyLine && line.from) {
+            let prevLine = doc.lineAt(line.from - 1), quoted = />\s*$/.exec(prevLine.text);
+            // Two aligned empty quoted lines in a row
+            if (quoted && quoted.index == inner.from) {
+                let changes = state.changes([{ from: prevLine.from + quoted.index, to: prevLine.to },
+                    { from: line.from + inner.from, to: line.to }]);
+                return { range: range.map(changes), changes };
+            }
+        }
+        let changes = [];
+        if (inner.node.name == "OrderedList")
+            renumberList(inner.item, doc, changes);
+        let continued = inner.item && inner.item.from < line.from;
+        let insert = "";
+        // If not dedented
+        if (!continued || /^[\s\d.)\-+*>]*/.exec(line.text)[0].length >= inner.to) {
+            for (let i = 0, e = context.length - 1; i <= e; i++) {
+                insert += i == e && !continued ? context[i].marker(doc, 1)
+                    : context[i].blank(i < e ? countColumn(line.text, 4, context[i + 1].from) - insert.length : null);
+            }
+        }
+        let from = pos;
+        while (from > line.from && /\s/.test(line.text.charAt(from - line.from - 1)))
+            from--;
+        insert = normalizeIndent(insert, state);
+        if (nonTightList(inner.node, state.doc))
+            insert = blankLine(context, state, line) + state.lineBreak + insert;
+        changes.push({ from, to: pos, insert: state.lineBreak + insert });
+        return { range: EditorSelection.cursor(from + insert.length + 1), changes };
+    });
+    if (dont)
+        return false;
+    dispatch(state.update(changes, { scrollIntoView: true, userEvent: "input" }));
+    return true;
+};
+function isMark(node) {
+    return node.name == "QuoteMark" || node.name == "ListMark";
+}
+function nonTightList(node, doc) {
+    if (node.name != "OrderedList" && node.name != "BulletList")
+        return false;
+    let first = node.firstChild, second = node.getChild("ListItem", "ListItem");
+    if (!second)
+        return false;
+    let line1 = doc.lineAt(first.to), line2 = doc.lineAt(second.from);
+    let empty = /^[\s>]*$/.test(line1.text);
+    return line1.number + (empty ? 0 : 1) < line2.number;
+}
+function blankLine(context, state, line) {
+    let insert = "";
+    for (let i = 0, e = context.length - 2; i <= e; i++) {
+        insert += context[i].blank(i < e ? countColumn(line.text, 4, context[i + 1].from) - insert.length : null, i < e);
+    }
+    return normalizeIndent(insert, state);
+}
+function contextNodeForDelete(tree, pos) {
+    let node = tree.resolveInner(pos, -1), scan = pos;
+    if (isMark(node)) {
+        scan = node.from;
+        node = node.parent;
+    }
+    for (let prev; prev = node.childBefore(scan);) {
+        if (isMark(prev)) {
+            scan = prev.from;
+        }
+        else if (prev.name == "OrderedList" || prev.name == "BulletList") {
+            node = prev.lastChild;
+            scan = node.to;
+        }
+        else {
+            break;
+        }
+    }
+    return node;
+}
+/**
+This command will, when invoked in a Markdown context with the
+cursor directly after list or blockquote markup, delete one level
+of markup. When the markup is for a list, it will be replaced by
+spaces on the first invocation (a further invocation will delete
+the spaces), to make it easy to continue a list.
+
+When not after Markdown block markup, this command will return
+false, so it is intended to be bound alongside other deletion
+commands, with a higher precedence than the more generic commands.
+*/
+const deleteMarkupBackward = ({ state, dispatch }) => {
+    let tree = syntaxTree(state);
+    let dont = null, changes = state.changeByRange(range => {
+        let pos = range.from, { doc } = state;
+        if (range.empty && markdownLanguage.isActiveAt(state, range.from)) {
+            let line = doc.lineAt(pos);
+            let context = getContext(contextNodeForDelete(tree, pos), doc);
+            if (context.length) {
+                let inner = context[context.length - 1];
+                let spaceEnd = inner.to - inner.spaceAfter.length + (inner.spaceAfter ? 1 : 0);
+                // Delete extra trailing space after markup
+                if (pos - line.from > spaceEnd && !/\S/.test(line.text.slice(spaceEnd, pos - line.from)))
+                    return { range: EditorSelection.cursor(line.from + spaceEnd),
+                        changes: { from: line.from + spaceEnd, to: pos } };
+                if (pos - line.from == spaceEnd &&
+                    // Only apply this if we're on the line that has the
+                    // construct's syntax, or there's only indentation in the
+                    // target range
+                    (!inner.item || line.from <= inner.item.from || !/\S/.test(line.text.slice(0, inner.to)))) {
+                    let start = line.from + inner.from;
+                    // Replace a list item marker with blank space
+                    if (inner.item && inner.node.from < inner.item.from && /\S/.test(line.text.slice(inner.from, inner.to))) {
+                        let insert = inner.blank(countColumn(line.text, 4, inner.to) - countColumn(line.text, 4, inner.from));
+                        if (start == line.from)
+                            insert = normalizeIndent(insert, state);
+                        return { range: EditorSelection.cursor(start + insert.length),
+                            changes: { from: start, to: line.from + inner.to, insert } };
+                    }
+                    // Delete one level of indentation
+                    if (start < pos)
+                        return { range: EditorSelection.cursor(start), changes: { from: start, to: pos } };
+                }
+            }
+        }
+        return dont = { range };
+    });
+    if (dont)
+        return false;
+    dispatch(state.update(changes, { scrollIntoView: true, userEvent: "delete" }));
+    return true;
+};
+
+/**
+A small keymap with Markdown-specific bindings. Binds Enter to
+[`insertNewlineContinueMarkup`](https://codemirror.net/6/docs/ref/#lang-markdown.insertNewlineContinueMarkup)
+and Backspace to
+[`deleteMarkupBackward`](https://codemirror.net/6/docs/ref/#lang-markdown.deleteMarkupBackward).
+*/
+const markdownKeymap = [
+    { key: "Enter", run: insertNewlineContinueMarkup },
+    { key: "Backspace", run: deleteMarkupBackward }
+];
+const htmlNoMatch = /*@__PURE__*/html({ matchClosingTags: false });
+/**
+Markdown language support.
+*/
+function markdown(config = {}) {
+    let { codeLanguages, defaultCodeLanguage, addKeymap = true, base: { parser } = commonmarkLanguage, completeHTMLTags = true } = config;
+    if (!(parser instanceof MarkdownParser))
+        throw new RangeError("Base parser provided to `markdown` should be a Markdown parser");
+    let extensions = config.extensions ? [config.extensions] : [];
+    let support = [htmlNoMatch.support], defaultCode;
+    if (defaultCodeLanguage instanceof LanguageSupport) {
+        support.push(defaultCodeLanguage.support);
+        defaultCode = defaultCodeLanguage.language;
+    }
+    else if (defaultCodeLanguage) {
+        defaultCode = defaultCodeLanguage;
+    }
+    let codeParser = codeLanguages || defaultCode ? getCodeParser(codeLanguages, defaultCode) : undefined;
+    extensions.push(parseCode({ codeParser, htmlParser: htmlNoMatch.language.parser }));
+    if (addKeymap)
+        support.push(Prec.high(keymap.of(markdownKeymap)));
+    let lang = mkLang(parser.configure(extensions));
+    if (completeHTMLTags)
+        support.push(lang.data.of({ autocomplete: htmlTagCompletion }));
+    return new LanguageSupport(lang, support);
+}
+function htmlTagCompletion(context) {
+    let { state, pos } = context, m = /<[:\-\.\w\u00b7-\uffff]*$/.exec(state.sliceDoc(pos - 25, pos));
+    if (!m)
+        return null;
+    let tree = syntaxTree(state).resolveInner(pos, -1);
+    while (tree && !tree.type.isTop) {
+        if (tree.name == "CodeBlock" || tree.name == "FencedCode" || tree.name == "ProcessingInstructionBlock" ||
+            tree.name == "CommentBlock" || tree.name == "Link" || tree.name == "Image")
+            return null;
+        tree = tree.parent;
+    }
+    return {
+        from: pos - m[0].length, to: pos,
+        options: htmlTagCompletions(),
+        validFor: /^<[:\-\.\w\u00b7-\uffff]*$/
+    };
+}
+let _tagCompletions = null;
+function htmlTagCompletions() {
+    if (_tagCompletions)
+        return _tagCompletions;
+    let result = htmlCompletionSource(new CompletionContext(EditorState.create({ extensions: htmlNoMatch }), 0, true));
+    return _tagCompletions = result ? result.options : [];
+}
+
+export { commonmarkLanguage, deleteMarkupBackward, insertNewlineContinueMarkup, markdown, markdownKeymap, markdownLanguage };