1 files changed, 103 insertions, 0 deletions
diff --git a/ext/js/templates/template-renderer-frame-api.js b/ext/js/templates/template-renderer-frame-api.js
new file mode 100644
index 00000000..cd9b4232
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+++ b/ext/js/templates/template-renderer-frame-api.js
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2023-2024  Yomitan Authors
+ * Copyright (C) 2020-2022  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {createApiMap, invokeApiMapHandler} from '../core/api-map.js';
+import {parseJson} from '../core/json.js';
+
+export class TemplateRendererFrameApi {
+    /**
+     * @param {import('./template-renderer.js').TemplateRenderer} templateRenderer
+     */
+    constructor(templateRenderer) {
+        /** @type {import('./template-renderer.js').TemplateRenderer} */
+        this._templateRenderer = templateRenderer;
+        /** @type {import('template-renderer-proxy').FrontendApiMap} */
+        this._windowMessageHandlers = createApiMap([
+            ['render', this._onRender.bind(this)],
+            ['renderMulti', this._onRenderMulti.bind(this)],
+            ['getModifiedData', this._onGetModifiedData.bind(this)]
+        ]);
+    }
+
+    /**
+     * @returns {void}
+     */
+    prepare() {
+        window.addEventListener('message', this._onWindowMessage.bind(this), false);
+        this._postMessage(window.parent, 'ready', void 0, null);
+    }
+
+    // Private
+
+    /**
+     * @param {MessageEvent<import('template-renderer-proxy').FrontendMessageAny>} e
+     */
+    _onWindowMessage(e) {
+        const {source, data: {action, params, id}} = e;
+        invokeApiMapHandler(this._windowMessageHandlers, action, params, [], (response) => {
+            this._postMessage(/** @type {Window} */ (source), 'response', response, id);
+        });
+    }
+
+    /**
+     * @param {{template: string, data: import('template-renderer').PartialOrCompositeRenderData, type: import('anki-templates').RenderMode}} event
+     * @returns {import('template-renderer').RenderResult}
+     */
+    _onRender({template, data, type}) {
+        return this._templateRenderer.render(template, data, type);
+    }
+
+    /**
+     * @param {{items: import('template-renderer').RenderMultiItem[]}} event
+     * @returns {import('core').Response<import('template-renderer').RenderResult>[]}
+     */
+    _onRenderMulti({items}) {
+        return this._templateRenderer.renderMulti(items);
+    }
+
+    /**
+     * @param {{data: import('template-renderer').CompositeRenderData, type: import('anki-templates').RenderMode}} event
+     * @returns {import('anki-templates').NoteData}
+     */
+    _onGetModifiedData({data, type}) {
+        const result = this._templateRenderer.getModifiedData(data, type);
+        return this._clone(result);
+    }
+
+    /**
+     * @template [T=unknown]
+     * @param {T} value
+     * @returns {T}
+     */
+    _clone(value) {
+        return parseJson(JSON.stringify(value));
+    }
+
+    /**
+     * @template {import('template-renderer-proxy').BackendApiNames} TName
+     * @param {Window} target
+     * @param {TName} action
+     * @param {import('template-renderer-proxy').BackendApiParams<TName>} params
+     * @param {?string} id
+     */
+    _postMessage(target, action, params, id) {
+        /** @type {import('template-renderer-proxy').BackendMessageAny} */
+        const data = {action, params, id};
+        target.postMessage(data, '*');
+    }
+}