got started on a dedicated editor component

src/components/textarea/textarea.module.css

@@ -23,16 +23,6 @@
     }
 }
 
-.search {
-    position: absolute;
-    inset-inline-end: 0;
-    inset-block-start: 0;
-
-    display: block grid;
-    grid-auto-flow: row;
-    gap: .5em;
-}
-
 .suggestions {
     position-anchor: --suggestions;
 

src/components/textarea/textarea.tsx

@@ -1,10 +1,8 @@
-import { Component, createEffect, createMemo, createSignal, For, on, untrack } from 'solid-js';
-import { createSelection, getTextNodes } from '@solid-primitives/selection';
-import { isServer } from 'solid-js/web';
+import { createEffect, createSignal, on } from 'solid-js';
+import { getTextNodes } from '@solid-primitives/selection';
 import { createEditContext } from '~/features/editor';
 import { createSource } from '~/features/source';
 import css from './textarea.module.css';
-import { debounce } from '@solid-primitives/scheduled';
 
 interface TextareaProps {
     class?: string;
@@ -18,11 +16,10 @@ interface TextareaProps {
 }
 
 export function Textarea(props: TextareaProps) {
-    const [replacement, setReplacement] = createSignal('');
     const [editorRef, setEditorRef] = createSignal<HTMLElement>();
 
     const source = createSource(() => props.value);
-    const [text, { mutate }] = createEditContext(editorRef, () => source.out);
+    const [text] = createEditContext(editorRef, () => source.out);
 
     createEffect(() => {
         source.out = text();
@@ -44,18 +41,7 @@ export function Textarea(props: TextareaProps) {
         createHighlights(ref, 'search-results', errors);
     }));
 
-    const replace = () => {
-        mutate(text => text.replaceAll(source.query, replacement()));
-    };
-
-    return <>
-        <div class={css.search}>
-            <input type="search" title={`${props.title ?? ''}-search`} placeholder="search for" oninput={e => source.query = e.target.value} />
-            <input type="search" title={`${props.title ?? ''}-replace`} placeholder="replace with" oninput={e => setReplacement(e.target.value)} />
-            <button onclick={() => replace()}>replace</button>
-        </div>
-
-        <div
+    return <div
         ref={setEditorRef}
         class={`${css.textarea} ${props.class}`}
         title={props.title ?? ''}
@@ -65,8 +51,7 @@ export function Textarea(props: TextareaProps) {
         data-placeholder={props.placeholder ?? ''}
         on:keydown={e => e.stopPropagation()}
         on:pointerdown={e => e.stopPropagation()}
-        />
-    </>;
+    />;
 }
 
 const createHighlights = (node: Node, type: string, ranges: [number, number][]) => {

src/features/editor/context.ts

@@ -12,7 +12,7 @@ type Editor = [Accessor<string>, { select(range: Range): void, mutate(setter: (t
 export function createEditor(ref: Accessor<Element | undefined>, value: Accessor<string>): Editor {
     if (isServer) {
         return [value, {
-            select(range) { },
+            select() { },
             mutate() { },
         }];
     }
@@ -101,8 +101,6 @@ export function createEditor(ref: Accessor<Element | undefined>, value: Accessor
                 selection.removeAllRanges();
             }
 
-            console.log('is it me?');
-
             selection.addRange(range);
         });
     }
@@ -149,7 +147,7 @@ export function createEditor(ref: Accessor<Element | undefined>, value: Accessor
 
                 updateText(start, end, '&nbsp;&nbsp;&nbsp;&nbsp;');
             } else if (e.key === 'Enter') {
-                updateText(start, end, '\n');
+                updateText(start, end, '</p><p>&nbsp;');
             }
         },
     });
@@ -270,7 +268,7 @@ declare global {
 
     interface EditContextConstructor {
         new(): EditContext;
-        new(options: Partial<{ text: string, selectionStart: number, selectionEnd: number }>): EditContext;
+        new(options: Partial<Pick<EditContext, 'text' | 'selectionStart' | 'selectionEnd'>>): EditContext;
         readonly prototype: EditContext;
     }
 

src/features/editor/editor.tsx

@@ -1,20 +1,101 @@
 import { createContextProvider } from "@solid-primitives/context";
-import { createEffect, ParentProps } from "solid-js";
+import { Accessor, createEffect, createSignal, on, ParentProps, Setter } from "solid-js";
 import { createEditor } from "./context";
+import { createSource, Source } from "../source";
+import { getTextNodes } from "@solid-primitives/selection";
 
+interface EditorContextType {
+    text: Accessor<string>;
+    readonly source: Source;
+    select(range: Range): void;
+    mutate(setter: (prev: string) => string): void;
+}
 
-const [EditorProvider, useEditor] = createContextProvider((props: { ref: Element, value: string }) => {
-    const [text] = createEditor(() => props.ref, () => props.value);
+interface EditorContextProps extends Record<string, unknown> {
+    ref: Accessor<Element | undefined>;
+    value: string;
+    oninput?: (value: string) => void;
+}
+
+const [EditorProvider, useEditor] = createContextProvider<EditorContextType, EditorContextProps>((props) => {
+    const source = createSource(() => props.value);
+    const [text, { select, mutate }] = createEditor(props.ref, () => source.out);
 
     createEffect(() => {
-        console.log(text());
+        props.oninput?.(source.in);
     });
 
-    return { text };
+    createEffect(() => {
+        source.out = text();
     });
 
+    createEffect(on(() => [props.ref()!, source.spellingErrors] as const, ([ref, errors]) => {
+        createHighlights(ref, 'spelling-error', errors);
+    }));
+
+    createEffect(on(() => [props.ref()!, source.grammarErrors] as const, ([ref, errors]) => {
+        createHighlights(ref, 'grammar-error', errors);
+    }));
+
+    createEffect(on(() => [props.ref()!, source.queryResults] as const, ([ref, results]) => {
+        createHighlights(ref, 'search-results', results);
+    }));
+
+    return {
+        text,
+        select,
+        mutate,
+        source,
+    };
+}, { text: () => '', source: {} as Source, select() { }, mutate() { } });
+
 export { useEditor };
 
-export function Editor(props: ParentProps<{ ref: Element, value: string }>) {
-    return <EditorProvider ref={props.ref} value={props.value}>{props.children}</EditorProvider>;
+export function Editor(props: ParentProps<{ value: string, oninput?: (value: string) => void }>) {
+    const [ref, setRef] = createSignal<Element>();
+
+    return <EditorProvider ref={ref} value={props.value} oninput={props.oninput}>
+        {props.children}
+
+        <Content ref={setRef} />
+    </EditorProvider>;
 }
+
+function Content(props: { ref: Setter<Element | undefined> }) {
+    const { text } = useEditor();
+
+    return <div ref={props.ref} innerHTML={text()} />;
+}
+
+const createHighlights = (node: Node, type: string, indices: [number, number][]) => {
+    queueMicrotask(() => {
+        const nodes = getTextNodes(node);
+
+        CSS.highlights.set(type, new Highlight(...indices.map(([start, end]) => indicesToRange(start, end, nodes))));
+    });
+};
+
+const indicesToRange = (start: number, end: number, textNodes: Node[]) => {
+    const [startNode, startPos] = getRangeArgs(start, textNodes);
+    const [endNode, endPos] = start === end ? [startNode, startPos] : getRangeArgs(end, textNodes);
+
+    const range = new Range();
+
+    if (startNode && endNode && startPos !== -1 && endPos !== -1) {
+        range.setStart(startNode, startPos);
+        range.setEnd(endNode, endPos);
+    }
+
+    return range;
+}
+
+const getRangeArgs = (offset: number, texts: Node[]): [node: Node | null, offset: number] =>
+    texts.reduce(
+        ([node, pos], text) =>
+            node
+                ? [node, pos]
+                : pos <= (text as Text).data.length
+                    ? [text, pos]
+                    : [null, pos - (text as Text).data.length],
+        [null, offset] as [node: Node | null, pos: number],
+    );

src/features/source/source.ts

@@ -121,26 +121,14 @@ function plainTextStringify() {
     };
 }
 
-function* findMatches(text: string, query: string): Generator<[number, number], void, unknown> {
+function findMatches(text: string, query: string): [number, number][] {
     if (query.length < 1) {
-        return;
+        return [];
     }
 
-    let startIndex = 0;
-
-    while (startIndex < text.length) {
-        const index = text.indexOf(query, startIndex);
-
-        if (index === -1) {
-            break;
-        }
-
-        const end = index + query.length;
-
-        yield [index, end];
-
-        startIndex = end;
-    }
+    return text.matchAll(new RegExp(query, 'gi')).map<[number, number]>(({ index }) => {
+        return [index, index + query.length];
+    }).toArray();
 }
 
 const spellChecker = checker(/\w+/gi);

src/routes/(editor)/experimental/formatter.module.css

@@ -19,4 +19,32 @@
         padding: .5em;
         background-color: transparent;
     }
+
+    & ::highlight(search-results) {
+        background-color: var(--secondary-900);
+    }
+
+    & ::highlight(spelling-error) {
+        text-decoration-line: spelling-error;
+    }
+
+    & ::highlight(grammar-error) {
+        text-decoration-line: grammar-error;
+    }
+
+    .search {
+        position: absolute;
+        inset-inline-end: 0;
+        inset-block-start: 0;
+
+        display: block grid;
+        grid-auto-flow: row;
+
+        padding: .5em;
+        gap: .5em;
+
+        background-color: var(--surface-700);
+        border-radius: var(--radii-m);
+        box-shadow: var(--shadow-2);
+    }
 }

src/routes/(editor)/experimental/formatter.tsx

@@ -1,8 +1,8 @@
-import { createSignal } from "solid-js";
+import { createEffect, createSignal } from "solid-js";
 import { debounce } from "@solid-primitives/scheduled";
 import { Textarea } from "~/components/textarea";
 import css from './formatter.module.css';
-import { Editor } from "~/features/editor";
+import { Editor, useEditor } from "~/features/editor";
 
 const tempVal = `
 # Header
@@ -13,15 +13,13 @@ this is *a string* that contains italicized text
 
 > Dorothy followed her through many of the beautiful rooms in her castle.
 
-> Dorothy followed her through many of the beautiful rooms in her castle.
->
-> > The Witch bade her clean the pots and kettles and sweep the floor and keep the fire fed with wood.
-
 > #### The quarterly results look great!
 >
 > - Revenue was off the chart.
 > - Profits were higher than ever.
 >
+> > The Witch bade her clean the pots and kettles and sweep the floor and keep the fire fed with wood.
+>
 > *Everything* is going according to **plan**.
 
 - First item
@@ -39,6 +37,25 @@ export default function Formatter(props: {}) {
 
     return <div class={css.root}>
         <textarea oninput={onInput} title="markdown">{value()}</textarea>
-        <Textarea class={css.textarea} title="html" value={value()} oninput={setValue} lang="en-GB" />
+        <Editor value={value()} oninput={setValue}>
+            <SearchAndReplace />
+        </Editor>
+
+        {/* <Textarea class={css.textarea} title="html" value={value()} oninput={setValue} lang="en-GB" /> */}
     </div>;
 }
+
+function SearchAndReplace() {
+    const { mutate, source } = useEditor();
+    const [replacement, setReplacement] = createSignal('');
+
+    const replace = () => {
+        mutate(text => text.replaceAll(source.query, replacement()));
+    };
+
+    return <form class={css.search}>
+        <input type="search" title="editor-search" placeholder="search for" oninput={e => source.query = e.target.value} />
+        <input type="search" title="editor-replace" placeholder="replace with" oninput={e => setReplacement(e.target.value)} />
+        <button onclick={() => replace()}>replace</button>
+    </form>;
+};