Attempted adding tricky custom block

Attempted adding callouts, which have the challenge of being shown via
HTML within markdown content. Got stuck on parsing back to the state
from markdown.

resources/js/editor.js

@@ -1,63 +1,6 @@
-import {EditorState} from "prosemirror-state";
-import {EditorView} from "prosemirror-view";
-import {exampleSetup} from "prosemirror-example-setup";
-import {defaultMarkdownParser,
-    defaultMarkdownSerializer} from "prosemirror-markdown";
-import {DOMParser, DOMSerializer} from "prosemirror-model";
+import MarkdownView from "./editor/MarkdownView";
+import ProseMirrorView from "./editor/ProseMirrorView";
 
-import {schema} from "./editor/schema";
-
-class MarkdownView {
-    constructor(target, content) {
-
-        // Build DOM from content
-        const renderDoc = document.implementation.createHTMLDocument();
-        renderDoc.body.innerHTML = content;
-
-        const htmlDoc = DOMParser.fromSchema(schema).parse(renderDoc.body);
-        const markdown = defaultMarkdownSerializer.serialize(htmlDoc);
-
-        this.textarea = target.appendChild(document.createElement("textarea"))
-        this.textarea.value = markdown;
-    }
-
-    get content() {
-        const markdown = this.textarea.value;
-        const doc = defaultMarkdownParser.parse(markdown);
-        const fragment = DOMSerializer.fromSchema(schema).serializeFragment(doc.content);
-        const renderDoc = document.implementation.createHTMLDocument();
-        renderDoc.body.appendChild(fragment);
-        return renderDoc.body.innerHTML;
-    }
-
-    focus() { this.textarea.focus() }
-    destroy() { this.textarea.remove() }
-}
-
-class ProseMirrorView {
-    constructor(target, content) {
-
-        // Build DOM from content
-        const renderDoc = document.implementation.createHTMLDocument();
-        renderDoc.body.innerHTML = content;
-
-        this.view = new EditorView(target, {
-            state: EditorState.create({
-                doc: DOMParser.fromSchema(schema).parse(renderDoc.body),
-                plugins: exampleSetup({schema})
-            })
-        });
-    }
-
-    get content() {
-        const fragment = DOMSerializer.fromSchema(schema).serializeFragment(this.view.state.doc.content);
-        const renderDoc = document.implementation.createHTMLDocument();
-        renderDoc.body.appendChild(fragment);
-        return renderDoc.body.innerHTML;
-    }
-    focus() { this.view.focus() }
-    destroy() { this.view.destroy() }
-}
 
 const place = document.querySelector("#editor");
 let view = new ProseMirrorView(place, document.getElementById('content').innerHTML);

resources/js/editor/MarkdownView.js

@@ -0,0 +1,175 @@
+import schema from "./schema";
+import {MarkdownSerializer, MarkdownParser} from "prosemirror-markdown";
+import {DOMParser, DOMSerializer} from "prosemirror-model";
+import markdownit from "markdown-it";
+
+
+function listIsTight(tokens, i) {
+    while (++i < tokens.length)
+    { if (tokens[i].type != "list_item_open") { return tokens[i].hidden } }
+    return false
+}
+
+// TODO - Need to tweak parser logic
+//  so HTML blocks get parsed out using the normal DOMParser logic.
+//  Likely need to copy & alter the inner parsing logic
+
+const mdParser = new MarkdownParser(schema, markdownit("commonmark", {html: true}), {
+    blockquote: {block: "blockquote"},
+    paragraph: {block: "paragraph"},
+    html_block: { block: "callout", noCloseToken: true, getAttrs: function(tok) {
+        return {
+            type: 'info',
+        }
+    }},
+    list_item: {block: "list_item"},
+    bullet_list: {block: "bullet_list", getAttrs: function (_, tokens, i) { return ({tight: listIsTight(tokens, i)}); }},
+    ordered_list: {block: "ordered_list", getAttrs: function (tok, tokens, i) { return ({
+            order: +tok.attrGet("start") || 1,
+            tight: listIsTight(tokens, i)
+        }); }},
+    heading: {block: "heading", getAttrs: function (tok) { return ({level: +tok.tag.slice(1)}); }},
+    code_block: {block: "code_block", noCloseToken: true},
+    fence: {block: "code_block", getAttrs: function (tok) { return ({params: tok.info || ""}); }, noCloseToken: true},
+    hr: {node: "horizontal_rule"},
+    image: {node: "image", getAttrs: function (tok) { return ({
+            src: tok.attrGet("src"),
+            title: tok.attrGet("title") || null,
+            alt: tok.children[0] && tok.children[0].content || null
+        }); }},
+    hardbreak: {node: "hard_break"},
+
+    em: {mark: "em"},
+    strong: {mark: "strong"},
+    link: {mark: "link", getAttrs: function (tok) { return ({
+            href: tok.attrGet("href"),
+            title: tok.attrGet("title") || null
+        }); }},
+    code_inline: {mark: "code", noCloseToken: true}
+});
+
+const mdSerializer = new MarkdownSerializer({
+    blockquote: function blockquote(state, node) {
+        state.wrapBlock("> ", null, node, function () { return state.renderContent(node); });
+    },
+    callout: function(state, node) {
+        state.write(`<p class="callout ${node.attrs.type}">\n`);
+        state.text(node.textContent, false);
+        state.ensureNewLine();
+        state.write(`</p>`);
+        state.closeBlock(node);
+    },
+    code_block: function code_block(state, node) {
+        state.write("```" + (node.attrs.params || "") + "\n");
+        state.text(node.textContent, false);
+        state.ensureNewLine();
+        state.write("```");
+        state.closeBlock(node);
+    },
+    heading: function heading(state, node) {
+        state.write(state.repeat("#", node.attrs.level) + " ");
+        state.renderInline(node);
+        state.closeBlock(node);
+    },
+    horizontal_rule: function horizontal_rule(state, node) {
+        state.write(node.attrs.markup || "---");
+        state.closeBlock(node);
+    },
+    bullet_list: function bullet_list(state, node) {
+        state.renderList(node, "  ", function () { return (node.attrs.bullet || "*") + " "; });
+    },
+    ordered_list: function ordered_list(state, node) {
+        var start = node.attrs.order || 1;
+        var maxW = String(start + node.childCount - 1).length;
+        var space = state.repeat(" ", maxW + 2);
+        state.renderList(node, space, function (i) {
+            var nStr = String(start + i);
+            return state.repeat(" ", maxW - nStr.length) + nStr + ". "
+        });
+    },
+    list_item: function list_item(state, node) {
+        state.renderContent(node);
+    },
+    paragraph: function paragraph(state, node) {
+        state.renderInline(node);
+        state.closeBlock(node);
+    },
+
+    image: function image(state, node) {
+        state.write("![" + state.esc(node.attrs.alt || "") + "](" + state.esc(node.attrs.src) +
+            (node.attrs.title ? " " + state.quote(node.attrs.title) : "") + ")");
+    },
+    hard_break: function hard_break(state, node, parent, index) {
+        for (var i = index + 1; i < parent.childCount; i++)
+        { if (parent.child(i).type != node.type) {
+            state.write("\\\n");
+            return
+        } }
+    },
+    text: function text(state, node) {
+        state.text(node.text);
+    }
+}, {
+    em: {open: "*", close: "*", mixable: true, expelEnclosingWhitespace: true},
+    strong: {open: "**", close: "**", mixable: true, expelEnclosingWhitespace: true},
+    link: {
+        open: function open(_state, mark, parent, index) {
+            return isPlainURL(mark, parent, index, 1) ? "<" : "["
+        },
+        close: function close(state, mark, parent, index) {
+            return isPlainURL(mark, parent, index, -1) ? ">"
+                : "](" + state.esc(mark.attrs.href) + (mark.attrs.title ? " " + state.quote(mark.attrs.title) : "") + ")"
+        }
+    },
+    code: {open: function open(_state, _mark, parent, index) { return backticksFor(parent.child(index), -1) },
+        close: function close(_state, _mark, parent, index) { return backticksFor(parent.child(index - 1), 1) },
+        escape: false}
+});
+
+function backticksFor(node, side) {
+    var ticks = /`+/g, m, len = 0;
+    if (node.isText) { while (m = ticks.exec(node.text)) { len = Math.max(len, m[0].length); } }
+    var result = len > 0 && side > 0 ? " `" : "`";
+    for (var i = 0; i < len; i++) { result += "`"; }
+    if (len > 0 && side < 0) { result += " "; }
+    return result
+}
+
+function isPlainURL(link, parent, index, side) {
+    if (link.attrs.title || !/^\w+:/.test(link.attrs.href)) { return false }
+    var content = parent.child(index + (side < 0 ? -1 : 0));
+    if (!content.isText || content.text != link.attrs.href || content.marks[content.marks.length - 1] != link) { return false }
+    if (index == (side < 0 ? 1 : parent.childCount - 1)) { return true }
+    var next = parent.child(index + (side < 0 ? -2 : 1));
+    return !link.isInSet(next.marks)
+}
+
+class MarkdownView {
+    constructor(target, content) {
+
+        // Build DOM from content
+        const renderDoc = document.implementation.createHTMLDocument();
+        renderDoc.body.innerHTML = content;
+
+        const htmlDoc = DOMParser.fromSchema(schema).parse(renderDoc.body);
+        const markdown = mdSerializer.serialize(htmlDoc);
+
+        this.textarea = target.appendChild(document.createElement("textarea"))
+        this.textarea.value = markdown;
+    }
+
+    get content() {
+        const markdown = this.textarea.value;
+        const doc = mdParser.parse(markdown);
+        console.log(doc);
+        const fragment = DOMSerializer.fromSchema(schema).serializeFragment(doc.content);
+        const renderDoc = document.implementation.createHTMLDocument();
+        renderDoc.body.appendChild(fragment);
+        return renderDoc.body.innerHTML;
+    }
+
+    focus() { this.textarea.focus() }
+    destroy() { this.textarea.remove() }
+}
+
+export default MarkdownView;

resources/js/editor/ProseMirrorView.js

@@ -0,0 +1,34 @@
+import {EditorState} from "prosemirror-state";
+import {EditorView} from "prosemirror-view";
+import {exampleSetup} from "prosemirror-example-setup";
+
+import {DOMParser, DOMSerializer} from "prosemirror-model";
+
+import schema from "./schema";
+
+class ProseMirrorView {
+    constructor(target, content) {
+
+        // Build DOM from content
+        const renderDoc = document.implementation.createHTMLDocument();
+        renderDoc.body.innerHTML = content;
+
+        this.view = new EditorView(target, {
+            state: EditorState.create({
+                doc: DOMParser.fromSchema(schema).parse(renderDoc.body),
+                plugins: exampleSetup({schema})
+            })
+        });
+    }
+
+    get content() {
+        const fragment = DOMSerializer.fromSchema(schema).serializeFragment(this.view.state.doc.content);
+        const renderDoc = document.implementation.createHTMLDocument();
+        renderDoc.body.appendChild(fragment);
+        return renderDoc.body.innerHTML;
+    }
+    focus() { this.view.focus() }
+    destroy() { this.view.destroy() }
+}
+
+export default ProseMirrorView;

resources/js/editor/schema.js

@@ -2,9 +2,35 @@ import {Schema} from "prosemirror-model";
 import {schema as basicSchema} from "prosemirror-schema-basic";
 import {addListNodes} from "prosemirror-schema-list";
 
-const bookstackSchema = new Schema({
-    nodes: addListNodes(basicSchema.spec.nodes, "paragraph block*", "block"),
+const baseNodes = addListNodes(basicSchema.spec.nodes, "paragraph block*", "block");
+
+const nodeCallout = {
+    attrs: {
+        type: {default: 'info'},
+    },
+    content: "inline*",
+    group: "block",
+    defining: true,
+    parseDOM: [
+        {tag: 'p.callout.info', attrs: {type: 'info'}},
+        {tag: 'p.callout.success', attrs: {type: 'success'}},
+        {tag: 'p.callout.danger', attrs: {type: 'danger'}},
+        {tag: 'p.callout.warning', attrs: {type: 'warning'}},
+        {tag: 'p.callout', attrs: {type: 'info'}},
+    ],
+    toDOM: function(node) {
+        const type = node.attrs.type || 'info';
+        return ['p', {class: 'callout ' + type}, 0];
+    }
+};
+
+const customNodes = baseNodes.prepend({
+    callout: nodeCallout,
+});
+
+const schema = new Schema({
+    nodes: customNodes,
     marks: basicSchema.spec.marks
 })
 
-export {bookstackSchema as schema};
+export default schema;

resources/views/editor-test.blade.php

@@ -23,6 +23,9 @@
                 <li>Item C</li>
             </ul>
             <p>Lorem ipsum dolor sit amet.</p>
+            <p class="callout info">
+                This is an info callout test!
+            </p>
         </div>
 
     </div>