refactor state and overlay runtime helpers

src/main/overlay-runtime.ts

@@ -0,0 +1,140 @@
+import type { BrowserWindow } from "electron";
+
+type OverlayHostedModal = "runtime-options" | "subsync" | "jimaku";
+type OverlayHostLayer = "visible" | "invisible";
+
+export interface OverlayWindowResolver {
+  getMainWindow: () => BrowserWindow | null;
+  getInvisibleWindow: () => BrowserWindow | null;
+}
+
+export interface OverlayModalRuntime {
+  sendToActiveOverlayWindow: (
+    channel: string,
+    payload?: unknown,
+    runtimeOptions?: { restoreOnModalClose?: OverlayHostedModal },
+  ) => boolean;
+  openRuntimeOptionsPalette: () => void;
+  handleOverlayModalClosed: (modal: OverlayHostedModal) => void;
+  getRestoreVisibleOverlayOnModalClose: () => Set<OverlayHostedModal>;
+}
+
+export function createOverlayModalRuntimeService(
+  deps: OverlayWindowResolver,
+): OverlayModalRuntime {
+  const restoreVisibleOverlayOnModalClose = new Set<OverlayHostedModal>();
+  const overlayModalAutoShownLayer = new Map<OverlayHostedModal, OverlayHostLayer>();
+
+  const getTargetOverlayWindow = (): {
+    window: BrowserWindow;
+    layer: OverlayHostLayer;
+  } | null => {
+    const visibleMainWindow = deps.getMainWindow();
+    const invisibleWindow = deps.getInvisibleWindow();
+
+    if (visibleMainWindow && !visibleMainWindow.isDestroyed()) {
+      return { window: visibleMainWindow, layer: "visible" };
+    }
+
+    if (invisibleWindow && !invisibleWindow.isDestroyed()) {
+      return { window: invisibleWindow, layer: "invisible" };
+    }
+
+    return null;
+  };
+
+  const showOverlayWindowForModal = (window: BrowserWindow, layer: OverlayHostLayer): void => {
+    if (layer === "invisible" && typeof window.showInactive === "function") {
+      window.showInactive();
+    } else {
+      window.show();
+    }
+    if (!window.isFocused()) {
+      window.focus();
+    }
+  };
+
+  const sendToActiveOverlayWindow = (
+    channel: string,
+    payload?: unknown,
+    runtimeOptions?: { restoreOnModalClose?: OverlayHostedModal },
+  ): boolean => {
+    const target = getTargetOverlayWindow();
+    if (!target) return false;
+
+    const { window: targetWindow, layer } = target;
+    const wasVisible = targetWindow.isVisible();
+    const restoreOnModalClose = runtimeOptions?.restoreOnModalClose;
+
+    const sendNow = (): void => {
+      if (payload === undefined) {
+        targetWindow.webContents.send(channel);
+      } else {
+        targetWindow.webContents.send(channel, payload);
+      }
+    };
+
+    if (!wasVisible) {
+      showOverlayWindowForModal(targetWindow, layer);
+    }
+    if (!wasVisible && restoreOnModalClose) {
+      restoreVisibleOverlayOnModalClose.add(restoreOnModalClose);
+      overlayModalAutoShownLayer.set(restoreOnModalClose, layer);
+    }
+
+    if (targetWindow.webContents.isLoading()) {
+      targetWindow.webContents.once("did-finish-load", () => {
+        if (
+          targetWindow &&
+          !targetWindow.isDestroyed() &&
+          !targetWindow.webContents.isLoading()
+        ) {
+          sendNow();
+        }
+      });
+      return true;
+    }
+
+    sendNow();
+    return true;
+  };
+
+  const openRuntimeOptionsPalette = (): void => {
+    sendToActiveOverlayWindow("runtime-options:open", undefined, {
+      restoreOnModalClose: "runtime-options",
+    });
+  };
+
+  const handleOverlayModalClosed = (modal: OverlayHostedModal): void => {
+    if (!restoreVisibleOverlayOnModalClose.has(modal)) return;
+    restoreVisibleOverlayOnModalClose.delete(modal);
+    const layer = overlayModalAutoShownLayer.get(modal);
+    overlayModalAutoShownLayer.delete(modal);
+    if (!layer) return;
+    const shouldKeepLayerVisible = [...restoreVisibleOverlayOnModalClose].some(
+      (pendingModal) => overlayModalAutoShownLayer.get(pendingModal) === layer,
+    );
+    if (shouldKeepLayerVisible) return;
+
+    if (layer === "visible") {
+      const mainWindow = deps.getMainWindow();
+      if (mainWindow && !mainWindow.isDestroyed()) {
+        mainWindow.hide();
+      }
+      return;
+    }
+    const invisibleWindow = deps.getInvisibleWindow();
+    if (invisibleWindow && !invisibleWindow.isDestroyed()) {
+      invisibleWindow.hide();
+    }
+  };
+
+  return {
+    sendToActiveOverlayWindow,
+    openRuntimeOptionsPalette,
+    handleOverlayModalClosed,
+    getRestoreVisibleOverlayOnModalClose: () => restoreVisibleOverlayOnModalClose,
+  };
+}
+
+export type { OverlayHostedModal };