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-rw-r--r--ext/js/templates/sandbox/anki-template-renderer-content-manager.js72
-rw-r--r--ext/js/templates/sandbox/anki-template-renderer.js15
2 files changed, 77 insertions, 10 deletions
diff --git a/ext/js/templates/sandbox/anki-template-renderer-content-manager.js b/ext/js/templates/sandbox/anki-template-renderer-content-manager.js
new file mode 100644
index 00000000..a2573e09
--- /dev/null
+++ b/ext/js/templates/sandbox/anki-template-renderer-content-manager.js
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 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/>.
+ */
+
+/**
+ * A callback used when a media file has been loaded.
+ * @callback AnkiTemplateRendererContentManager.OnLoadCallback
+ * @param {string} url The URL of the media that was loaded.
+ */
+
+/**
+ * A callback used when a media file should be unloaded.
+ * @callback AnkiTemplateRendererContentManager.OnUnloadCallback
+ * @param {boolean} fullyLoaded Whether or not the media was fully loaded.
+ */
+
+/**
+ * The content manager which is used when generating content for Anki.
+ */
+class AnkiTemplateRendererContentManager {
+ /**
+ * Creates a new instance of the class.
+ * @param {TemplateRendererMediaProvider} mediaProvider The media provider for the object.
+ * @param {object} data The data object passed to the Handlebars template renderer.
+ * See {@link AnkiNoteDataCreator.create}'s return value for structure information.
+ */
+ constructor(mediaProvider, data) {
+ this._mediaProvider = mediaProvider;
+ this._data = data;
+ this._onUnloadCallbacks = [];
+ }
+
+ /**
+ * Attempts to load the media file from a given dictionary.
+ * @param {string} path The path to the media file in the dictionary.
+ * @param {string} dictionary The name of the dictionary.
+ * @param {AnkiTemplateRendererContentManager.OnLoadCallback} onLoad The callback that is executed if the media was loaded successfully.
+ * No assumptions should be made about the synchronicity of this callback.
+ * @param {AnkiTemplateRendererContentManager.OnUnloadCallback} onUnload The callback that is executed when the media should be unloaded.
+ */
+ loadMedia(path, dictionary, onLoad, onUnload) {
+ const imageUrl = this._mediaProvider.getMedia(this._data, ['dictionaryMedia', path], {dictionary, format: 'fileName', default: null});
+ if (imageUrl === null) { return; }
+ onLoad(imageUrl);
+ if (typeof onUnload === 'function') {
+ this._onUnloadCallbacks.push(onUnload);
+ }
+ }
+
+ /**
+ * Unloads all media that has been loaded.
+ */
+ unloadAll() {
+ for (const onUnload of this._onUnloadCallbacks) {
+ onUnload(true);
+ }
+ this._onUnloadCallbacks = [];
+ }
+}
diff --git a/ext/js/templates/sandbox/anki-template-renderer.js b/ext/js/templates/sandbox/anki-template-renderer.js
index 67ea0d81..c75f92d3 100644
--- a/ext/js/templates/sandbox/anki-template-renderer.js
+++ b/ext/js/templates/sandbox/anki-template-renderer.js
@@ -17,6 +17,7 @@
/* global
* AnkiNoteDataCreator
+ * AnkiTemplateRendererContentManager
* CssStyleApplier
* DictionaryDataUtil
* Handlebars
@@ -534,16 +535,10 @@ class AnkiTemplateRenderer {
}
_createStructuredContentGenerator(data) {
- const mediaLoader = {
- loadMedia: async (path, dictionary, onLoad, onUnload) => {
- const imageUrl = this._mediaProvider.getMedia(data, ['dictionaryMedia', path], {dictionary, format: 'fileName', default: null});
- if (imageUrl !== null) {
- onLoad(imageUrl);
- this._cleanupCallbacks.push(() => onUnload(true));
- }
- }
- };
- return new StructuredContentGenerator(mediaLoader, document);
+ const contentManager = new AnkiTemplateRendererContentManager(this._mediaProvider, data);
+ const instance = new StructuredContentGenerator(contentManager, document);
+ this._cleanupCallbacks.push(() => contentManager.unloadAll());
+ return instance;
}
_formatGlossary(context, dictionary, options) {