Add minimal inline website editing engine

2026-10-11 17:12:43 +07:00
commit 6a6a21f39a
9 changed files with 777 additions and 0 deletions
@@ -0,0 +1,18 @@
+name: Verify WYSIWYG package
+on:
+  pull_request:
+  push:
+    branches: [main]
+jobs:
+  verify:
+    name: Full verification
+    runs-on: ci
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: npm
+      - run: npm ci --ignore-scripts
+      - run: npm run verify
+      - run: git diff --check
@@ -0,0 +1,2 @@
+node_modules/
+*.tgz
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 TROPIKAL
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
@@ -0,0 +1,30 @@
+# TROPIKAL Filament WYSIWYG
+
+A small, dependency-free browser editing engine for real website previews.
+Works with Filament 3 and 5 host adapters; it has no PHP or framework dependency.
+It is not a CMS, rich-document editor or generic HTML page builder.
+
+```js
+import { createInlineEditor } from '@tropikal/filament-wysiwyg';
+const editor = createInlineEditor(document, ({ address, value }) => saveDraft(address, value));
+editor.start(heading, 'hero.heading', {
+    kind: 'text', value: 'Your current heading', placeholders: [],
+});
+```
+
+One click focuses text. Enter applies, Shift+Enter adds a line, Escape cancels.
+Blur commits only changes. Paste inserts plain text. `formatted` preserves only
+emphasis/strong tags and escapes literal characters for an HTML-input boundary.
+Plain values remain plain strings. Complete rendered values must match the host's
+declared value; protected/interpolated/composite/rich fields remain contextual controls.
+
+The host owns authorization, allowed addresses, validation, media uploads,
+locales, draft concurrency, undo/recovery and publication. Never authorize a write
+from a DOM attribute alone. Iframe adapters must check both message source and
+exact origin; never use wildcard target origins. Do not rerender active text and
+destroy the caret. Call `destroy()` on teardown.
+
+Images are selected by the host and edited with its existing media controls;
+the engine deliberately does not own file storage or duplicate business models.
+Pin an immutable repository commit in each consumer's lockfile. Run `npm ci`
+and `npm run verify` before release. There is no runtime dependency or build step.
@@ -0,0 +1,546 @@
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+  "name": "@tropikal/filament-wysiwyg",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "@tropikal/filament-wysiwyg",
+      "version": "0.1.0",
+      "license": "MIT",
+      "devDependencies": {
+        "jsdom": "26.1.0"
+      }
+    },
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+      }
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+        "webidl-conversions": "^7.0.0"
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+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.22.0.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/xml-name-validator": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
+      "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true,
+      "license": "MIT"
+    }
+  }
+}
@@ -0,0 +1,11 @@
+{
+  "name": "@tropikal/filament-wysiwyg",
+  "version": "0.1.0",
+  "description": "Small framework-independent inline editing engine for Filament website previews",
+  "type": "module",
+  "license": "MIT",
+  "exports": { ".": { "types": "./src/index.d.ts", "import": "./src/index.js" } },
+  "files": ["src", "README.md", "LICENSE"],
+  "scripts": { "test": "node --test", "verify": "npm test && npm audit --audit-level=high && npm pack --dry-run" },
+  "devDependencies": { "jsdom": "26.1.0" }
+}
@@ -0,0 +1,9 @@
+export type InlineCapability = { kind: string; value: string; placeholders: string[] };
+export type InlineEdit = { address: string; value: string };
+export function createInlineEditor(document: Document, commit: (edit: InlineEdit) => void): {
+    start(element: HTMLElement, address: string, capability: InlineCapability | undefined): boolean;
+    finish(cancel?: boolean): void;
+    isActive(): boolean;
+    contains(target: Node): boolean;
+    destroy(): void;
+};
@@ -0,0 +1,82 @@
+const normalize = text => text.replace(/\s+/g, ' ').trim();
+const plain = text => text.replace(/<(\/?)(em|strong)>/g, '');
+
+// The host supplies only authorized, complete scalar values. It owns persistence.
+export function createInlineEditor(document, commit) {
+    let active = null;
+    function finish(cancel = false) {
+        const current = active;
+        if (!current) return;
+        active = null;
+        const value = serialize(current.element, current.capability.kind);
+        const input = serialize(current.element, current.capability.kind, current.capability.kind === 'formatted');
+        current.cleanup();
+        if (cancel) current.element.innerHTML = current.html;
+        else if (normalize(value) !== normalize(current.capability.value)) commit({ address: current.address, value: input });
+    }
+    function start(element, address, capability) {
+        if (active?.element === element) return true;
+        finish();
+        if (!capability || typeof capability.value !== 'string' || !Array.isArray(capability.placeholders)
+            || !['text', 'textarea', 'formatted'].includes(capability.kind)
+            || capability.placeholders.length || /\{\{[^}]+\}\}/.test(capability.value)
+            || element.querySelector('a,button,input,textarea,select,img,[data-cms-field],[data-cms-fields],[data-cms-image]')
+            || normalize(serialize(element, capability.kind)) !== normalize(capability.value)
+            || normalize(element.textContent ?? '') !== normalize(plain(capability.value))) return false;
+        const previous = ['contenteditable', 'role', 'aria-multiline', 'aria-label'].map(name => [name, element.getAttribute(name)]);
+        const blur = () => finish();
+        const keydown = event => {
+            if (event.key === 'Escape' || event.key === 'Enter' && !event.shiftKey) {
+                event.preventDefault(); event.stopPropagation();
+                finish(event.key === 'Escape'); element.blur();
+            }
+        };
+        const paste = event => {
+            event.preventDefault();
+            const text = event.clipboardData?.getData('text/plain');
+            const selection = document.getSelection();
+            if (text === undefined || !selection?.rangeCount) return;
+            const range = selection.getRangeAt(0);
+            if (!element.contains(range.commonAncestorContainer)) return;
+            range.deleteContents();
+            const node = document.createTextNode(text);
+            range.insertNode(node); range.setStartAfter(node); range.collapse(true);
+            selection.removeAllRanges(); selection.addRange(range);
+        };
+        active = { element, address, capability, html: element.innerHTML, cleanup: () => {
+            previous.forEach(([name, value]) => value === null ? element.removeAttribute(name) : element.setAttribute(name, value));
+            element.removeEventListener('blur', blur);
+            element.removeEventListener('keydown', keydown);
+            element.removeEventListener('paste', paste);
+        } };
+        element.setAttribute('contenteditable', 'true');
+        element.setAttribute('role', 'textbox');
+        element.setAttribute('aria-multiline', String(capability.kind === 'textarea'));
+        element.setAttribute('aria-label', 'Edit text. Enter to apply, Escape to cancel.');
+        element.addEventListener('blur', blur);
+        element.addEventListener('keydown', keydown);
+        element.addEventListener('paste', paste);
+        element.focus({ preventScroll: true });
+        return true;
+    }
+    return { start, finish, isActive: () => active !== null, contains: target => Boolean(active?.element.contains(target)), destroy: () => finish(true) };
+}
+
+function serialize(element, kind, escapeText = false) {
+    const visit = node => {
+        if (node.nodeType === 3) {
+            const text = node.textContent ?? '';
+            return escapeText ? text.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;').replace(/'/g, '&#039;') : text;
+        }
+        if (node.nodeType !== 1) return '';
+        const tag = node.tagName.toLowerCase();
+        if (['script', 'style'].includes(tag)) return '';
+        const content = [...node.childNodes].map(visit).join('');
+        if (kind === 'formatted' && ['em', 'i', 'strong', 'b'].includes(tag)) {
+            const allowed = ['em', 'i'].includes(tag) ? 'em' : 'strong';
+            return `<${allowed}>${content}</${allowed}>`;
+        }
+        return tag === 'br' ? '\n' : ['div', 'p'].includes(tag) ? `${content}\n` : content;
+    };
+    return [...element.childNodes].map(visit).join('').trim();
+}
@@ -0,0 +1,58 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { JSDOM } from 'jsdom';
+import { createInlineEditor } from '../src/index.js';
+
+function fixture(html = '<h2>Original</h2>') {
+    const { window } = new JSDOM(html);
+    const edits = [];
+    const editor = createInlineEditor(window.document, edit => edits.push(edit));
+    return { window, edits, editor, element: window.document.querySelector('h2') };
+}
+
+test('single selection focuses editable text; blur commits once and restores attributes', () => {
+    const { window, editor, element, edits } = fixture();
+    assert.equal(editor.start(element, 'title', { kind: 'text', value: 'Original', placeholders: [] }), true);
+    assert.equal(window.document.activeElement, element);
+    assert.equal(element.contentEditable, undefined); // JSDOM: inspect the browser attribute instead.
+    assert.equal(element.getAttribute('contenteditable'), 'true');
+    element.textContent = 'Changed';
+    element.dispatchEvent(new window.FocusEvent('blur'));
+    editor.finish();
+    assert.deepEqual(edits, [{ address: 'title', value: 'Changed' }]);
+    assert.equal(element.hasAttribute('contenteditable'), false);
+});
+
+test('Escape restores markup; Enter applies; reselect does not reset typed content', () => {
+    const { window, editor, element, edits } = fixture();
+    const cap = { kind: 'text', value: 'Original', placeholders: [] };
+    editor.start(element, 'title', cap);
+    element.textContent = 'Accidental';
+    assert.equal(editor.start(element, 'title', cap), true);
+    element.dispatchEvent(new window.KeyboardEvent('keydown', { key: 'Escape' }));
+    assert.equal(element.textContent, 'Original');
+    assert.deepEqual(edits, []);
+    editor.start(element, 'title', cap);
+    element.textContent = 'Intentional';
+    element.dispatchEvent(new window.KeyboardEvent('keydown', { key: 'Enter' }));
+    assert.deepEqual(edits, [{ address: 'title', value: 'Intentional' }]);
+});
+
+test('formatted input preserves emphasis, escapes literal text and strips attributes', () => {
+    const { editor, element, edits } = fixture('<h2>An <em>original</em></h2>');
+    editor.start(element, 'title', { kind: 'formatted', value: 'An <em>original</em>', placeholders: [] });
+    element.innerHTML = 'A &lt;literal&gt; &amp; <em onclick="evil()">new</em>';
+    editor.finish();
+    assert.deepEqual(edits, [{ address: 'title', value: 'A &lt;literal&gt; &amp; <em>new</em>' }]);
+});
+
+test('unowned, composite, partial, interpolated and rich values cannot become editable', () => {
+    const { editor, element } = fixture();
+    for (const cap of [undefined, { kind: 'text', value: 'Original extra', placeholders: [] },
+        { kind: 'text', value: 'Original {{price}}', placeholders: ['price'] },
+        { kind: 'rich', value: 'Original', placeholders: [] }, { kind: 'text', value: 42, placeholders: [] }]) {
+        assert.equal(editor.start(element, 'title', cap), false);
+    }
+    element.innerHTML = '<button>Original</button>';
+    assert.equal(editor.start(element, 'title', { kind: 'text', value: 'Original', placeholders: [] }), false);
+});