[Init] Initial commit - NetMesh terminal manager

application/state/sidePanelLiveStore.ts

@@ -0,0 +1,104 @@
+import type { Host, TerminalSession, TerminalTheme, Workspace } from '../../types';
+
+export type SidePanelLiveSnapshot = {
+  sftpActiveHost: Host | null;
+  activeTerminalSessionIdForSftp: string | null;
+  activeTerminalCwd: string | null;
+  activeTerminalCwdTrusted: boolean;
+  activeWorkspace: Workspace | undefined;
+  activeTerminalSessionForSystem: TerminalSession | null;
+  activeSystemSessionHost: Host | null;
+  focusedHost: Host | null;
+  focusedSessionId: string | null;
+  historySessionId: string | null;
+  resolvedPreviewTheme: TerminalTheme | null;
+  previewedOrVisibleThemeId: string | undefined;
+  focusedFontFamilyId: string | undefined;
+  focusedFontFamilyOverridden: boolean;
+  focusedFontSize: number | undefined;
+  focusedFontSizeOverridden: boolean;
+  focusedFontWeight: number | undefined;
+  focusedFontWeightOverridden: boolean;
+  focusedThemeOverridden: boolean;
+};
+
+const EMPTY_SNAPSHOT: SidePanelLiveSnapshot = {
+  sftpActiveHost: null,
+  activeTerminalSessionIdForSftp: null,
+  activeTerminalCwd: null,
+  activeTerminalCwdTrusted: false,
+  activeWorkspace: undefined,
+  activeTerminalSessionForSystem: null,
+  activeSystemSessionHost: null,
+  focusedHost: null,
+  focusedSessionId: null,
+  historySessionId: null,
+  resolvedPreviewTheme: null,
+  previewedOrVisibleThemeId: undefined,
+  focusedFontFamilyId: undefined,
+  focusedFontFamilyOverridden: false,
+  focusedFontSize: undefined,
+  focusedFontSizeOverridden: false,
+  focusedFontWeight: undefined,
+  focusedFontWeightOverridden: false,
+  focusedThemeOverridden: false,
+};
+
+export const SIDE_PANEL_INACTIVE_LIVE_SNAPSHOT = EMPTY_SNAPSHOT;
+
+type Listener = () => void;
+
+function liveSnapshotEqual(a: SidePanelLiveSnapshot, b: SidePanelLiveSnapshot): boolean {
+  return a.sftpActiveHost === b.sftpActiveHost
+    && a.activeTerminalSessionIdForSftp === b.activeTerminalSessionIdForSftp
+    && a.activeTerminalCwd === b.activeTerminalCwd
+    && a.activeTerminalCwdTrusted === b.activeTerminalCwdTrusted
+    && a.activeWorkspace === b.activeWorkspace
+    && a.activeTerminalSessionForSystem === b.activeTerminalSessionForSystem
+    && a.activeSystemSessionHost === b.activeSystemSessionHost
+    && a.focusedHost === b.focusedHost
+    && a.focusedSessionId === b.focusedSessionId
+    && a.historySessionId === b.historySessionId
+    && a.resolvedPreviewTheme === b.resolvedPreviewTheme
+    && a.previewedOrVisibleThemeId === b.previewedOrVisibleThemeId
+    && a.focusedFontFamilyId === b.focusedFontFamilyId
+    && a.focusedFontFamilyOverridden === b.focusedFontFamilyOverridden
+    && a.focusedFontSize === b.focusedFontSize
+    && a.focusedFontSizeOverridden === b.focusedFontSizeOverridden
+    && a.focusedFontWeight === b.focusedFontWeight
+    && a.focusedFontWeightOverridden === b.focusedFontWeightOverridden
+    && a.focusedThemeOverridden === b.focusedThemeOverridden;
+}
+
+class SidePanelLiveStore {
+  private snapshot: SidePanelLiveSnapshot = EMPTY_SNAPSHOT;
+  private listeners = new Set<Listener>();
+
+  getSnapshot = (): SidePanelLiveSnapshot => this.snapshot;
+
+  subscribe = (listener: Listener): (() => void) => {
+    this.listeners.add(listener);
+    return () => this.listeners.delete(listener);
+  };
+
+  update(next: SidePanelLiveSnapshot): void {
+    if (liveSnapshotEqual(this.snapshot, next)) return;
+    this.snapshot = next;
+    for (const listener of this.listeners) {
+      listener();
+    }
+  }
+}
+
+export const sidePanelLiveStore = new SidePanelLiveStore();
+
+const noopSubscribe = () => () => {};
+
+export function subscribeSidePanelLiveSnapshot(enabled: boolean, listener: Listener): () => void {
+  if (!enabled) return noopSubscribe();
+  return sidePanelLiveStore.subscribe(listener);
+}
+
+export function getSidePanelLiveSnapshot(enabled: boolean): SidePanelLiveSnapshot {
+  return enabled ? sidePanelLiveStore.getSnapshot() : SIDE_PANEL_INACTIVE_LIVE_SNAPSHOT;
+}