chore(monorepo/client): move client source files

apps/client/src/widgets/view_widgets/view_mode.ts

@@ -0,0 +1,35 @@
+import type { EventData } from "../../components/app_context.js";
+import type FNote from "../../entities/fnote.js";
+
+export interface ViewModeArgs {
+    $parent: JQuery<HTMLElement>;
+    parentNote: FNote;
+    noteIds: string[];
+    showNotePath?: boolean;
+}
+
+export default abstract class ViewMode {
+
+    constructor(args: ViewModeArgs) {
+        // note list must be added to the DOM immediately, otherwise some functionality scripting (canvas) won't work
+        args.$parent.empty();
+    }
+
+    abstract renderList(): Promise<JQuery<HTMLElement> | undefined>;
+
+    /**
+     * Called whenever an "entitiesReloaded" event has been received by the parent component.
+     *
+     * @param e the event data.
+     * @return {@code true} if the view should be re-rendered, a falsy value otherwise.
+     */
+    onEntitiesReloaded(e: EventData<"entitiesReloaded">): boolean | void {
+        // Do nothing by default.
+    }
+
+    get isFullHeight() {
+        // Override to change its value.
+        return false;
+    }
+
+}