feat: serialization of maximized views

packages/dockview-core/src/__tests__/dockview/dockviewComponent.spec.ts

@@ -679,7 +679,8 @@ describe('dockviewComponent', () => {
         expect(viewQuery.length).toBe(1);
     });
 
-    test('serialization', () => {
+    describe('serialization', () => {
+        test('basic', () => {
             dockview.layout(1000, 1000);
 
             dockview.fromJSON({
@@ -710,7 +711,10 @@ describe('dockviewComponent', () => {
                                     },
                                     {
                                         type: 'leaf',
-                                    data: { views: ['panel4'], id: 'group-3' },
+                                        data: {
+                                            views: ['panel4'],
+                                            id: 'group-3',
+                                        },
                                         size: 500,
                                     },
                                 ],
@@ -856,6 +860,53 @@ describe('dockviewComponent', () => {
             });
         });
 
+        test('serialized layout with maximized node', () => {
+            const api = new DockviewApi(dockview);
+
+            api.layout(500, 1000);
+
+            api.addPanel({
+                id: 'panel1',
+                component: 'default',
+            });
+
+            api.addPanel({
+                id: 'panel2',
+                component: 'default',
+                position: { direction: 'right' },
+            });
+
+            api.addPanel({
+                id: 'panel3',
+                component: 'default',
+                position: { direction: 'below' },
+            });
+
+            const panel4 = api.addPanel({
+                id: 'panel4',
+                component: 'default',
+            });
+
+            panel4.api.maximize();
+            expect(panel4.api.isMaximized()).toBeTruthy();
+
+            const state = api.toJSON();
+            expect(api.hasMaximizedGroup()).toBeTruthy();
+            expect(panel4.api.isMaximized()).toBeTruthy();
+
+            api.clear();
+            expect(api.groups.length).toBe(0);
+            expect(api.panels.length).toBe(0);
+
+            api.fromJSON(state);
+            const newPanel4 = api.getPanel('panel4')!;
+            expect(api.hasMaximizedGroup()).toBeTruthy();
+            expect(newPanel4.api.isMaximized()).toBeTruthy();
+
+            expect(state).toEqual(api.toJSON());
+        });
+    });
+
     test('add panel', () => {
         dockview.layout(500, 1000);
 

packages/dockview-core/src/api/component.api.ts

@@ -1,4 +1,5 @@
 import {
+    DockviewMaximizedGroupChanged,
     FloatingGroupOptions,
     IDockviewComponent,
     MovePanelEvent,
@@ -898,7 +899,7 @@ export class DockviewApi implements CommonApi<SerializedDockview> {
         this.component.exitMaximizedGroup();
     }
 
-    get onDidMaximizedGroupChange(): Event<void> {
+    get onDidMaximizedGroupChange(): Event<DockviewMaximizedGroupChanged> {
         return this.component.onDidMaximizedGroupChange;
     }
 

packages/dockview-core/src/dockview/dockviewComponent.ts

@@ -163,6 +163,11 @@ export interface FloatingGroupOptionsInternal extends FloatingGroupOptions {
     skipActiveGroup?: boolean;
 }
 
+export interface DockviewMaximizedGroupChanged {
+    group: DockviewGroupPanel;
+    isMaximized: boolean;
+}
+
 export interface IDockviewComponent extends IBaseGrid<DockviewGroupPanel> {
     readonly activePanel: IDockviewPanel | undefined;
     readonly totalPanels: number;
@@ -183,6 +188,7 @@ export interface IDockviewComponent extends IBaseGrid<DockviewGroupPanel> {
     readonly onDidActiveGroupChange: Event<DockviewGroupPanel | undefined>;
     readonly onUnhandledDragOverEvent: Event<DockviewDndOverlayEvent>;
     readonly onDidMovePanel: Event<MovePanelEvent>;
+    readonly onDidMaximizedGroupChange: Event<DockviewMaximizedGroupChanged>;
     readonly options: DockviewComponentOptions;
     updateOptions(options: DockviewOptions): void;
     moveGroupOrPanel(options: MoveGroupOrPanelOptions): void;
@@ -275,6 +281,10 @@ export class DockviewComponent
     private readonly _onDidMovePanel = new Emitter<MovePanelEvent>();
     readonly onDidMovePanel = this._onDidMovePanel.event;
 
+    private readonly _onDidMaximizedGroupChange =
+        new Emitter<DockviewMaximizedGroupChanged>();
+    readonly onDidMaximizedGroupChange = this._onDidMaximizedGroupChange.event;
+
     private readonly _floatingGroups: DockviewFloatingGroupPanel[] = [];
     private readonly _popoutGroups: {
         window: PopoutWindow;
@@ -395,6 +405,12 @@ export class DockviewComponent
                     this._onDidActiveGroupChange.fire(event);
                 }
             }),
+            this.onDidMaximizedChange((event) => {
+                this._onDidMaximizedGroupChange.fire({
+                    group: event.panel,
+                    isMaximized: event.isMaximized,
+                });
+            }),
             Event.any(
                 this.onDidAdd,
                 this.onDidRemove

packages/dockview-core/src/gridview/baseComponentGridview.ts

@@ -1,5 +1,10 @@
 import { Emitter, Event, AsapEvent } from '../events';
-import { getGridLocation, Gridview, IGridView } from './gridview';
+import {
+    getGridLocation,
+    Gridview,
+    IGridView,
+    MaximizedViewChanged,
+} from './gridview';
 import { Position } from '../dnd/droptarget';
 import { Disposable, IDisposable, IValueDisposable } from '../lifecycle';
 import { sequentialNumberGenerator } from '../math';
@@ -8,6 +13,7 @@ import { IPanel } from '../panel/types';
 import { MovementOptions2 } from '../dockview/options';
 import { Resizable } from '../resizable';
 import { Classnames } from '../dom';
+import { IGridviewComponent } from './gridviewComponent';
 
 const nextLayoutId = sequentialNumberGenerator();
 
@@ -29,6 +35,11 @@ export function toTarget(direction: Direction): Position {
     }
 }
 
+export interface MaximizedChanged<T extends IGridPanelView> {
+    panel: T;
+    isMaximized: boolean;
+}
+
 export interface BaseGridOptions {
     readonly proportionalLayout: boolean;
     readonly orientation: Orientation;
@@ -56,6 +67,8 @@ export interface IBaseGrid<T extends IGridPanelView> extends IDisposable {
     readonly activeGroup: T | undefined;
     readonly size: number;
     readonly groups: T[];
+    readonly onDidMaximizedChange: Event<MaximizedChanged<T>>;
+    readonly onDidLayoutChange: Event<void>;
     getPanel(id: string): T | undefined;
     toJSON(): object;
     fromJSON(data: any): void;
@@ -67,8 +80,6 @@ export interface IBaseGrid<T extends IGridPanelView> extends IDisposable {
     isMaximizedGroup(panel: T): boolean;
     exitMaximizedGroup(): void;
     hasMaximizedGroup(): boolean;
-    readonly onDidMaximizedGroupChange: Event<void>;
-    readonly onDidLayoutChange: Event<void>;
 }
 
 export abstract class BaseGrid<T extends IGridPanelView>
@@ -87,6 +98,10 @@ export abstract class BaseGrid<T extends IGridPanelView>
     private readonly _onDidAdd = new Emitter<T>();
     readonly onDidAdd: Event<T> = this._onDidAdd.event;
 
+    private readonly _onDidMaximizedChange = new Emitter<MaximizedChanged<T>>();
+    readonly onDidMaximizedChange: Event<MaximizedChanged<T>> =
+        this._onDidMaximizedChange.event;
+
     private readonly _onDidActiveChange = new Emitter<T | undefined>();
     readonly onDidActiveChange: Event<T | undefined> =
         this._onDidActiveChange.event;
@@ -171,6 +186,12 @@ export abstract class BaseGrid<T extends IGridPanelView>
         this.layout(0, 0, true); // set some elements height/widths
 
         this.addDisposables(
+            this.gridview.onDidMaximizedNodeChange((event) => {
+                this._onDidMaximizedChange.fire({
+                    panel: event.view as T,
+                    isMaximized: event.isMaximized,
+                });
+            }),
             this.gridview.onDidViewVisibilityChange(() =>
                 this._onDidViewVisibilityChangeMicroTaskQueue.fire()
             ),
@@ -250,10 +271,6 @@ export abstract class BaseGrid<T extends IGridPanelView>
         return this.gridview.hasMaximizedView();
     }
 
-    get onDidMaximizedGroupChange(): Event<void> {
-        return this.gridview.onDidMaximizedNodeChange;
-    }
-
     protected doAddGroup(
         group: T,
         location: number[] = [0],

packages/dockview-core/src/gridview/gridview.ts

@@ -265,11 +265,21 @@ export interface IViewDeserializer {
     fromJSON: (data: ISerializedLeafNode) => IGridView;
 }
 
+export interface SerializedNodeDescriptor {
+    location: number[];
+}
+
 export interface SerializedGridview<T> {
     root: SerializedGridObject<T>;
     width: number;
     height: number;
     orientation: Orientation;
+    maximizedNode?: SerializedNodeDescriptor;
+}
+
+export interface MaximizedViewChanged {
+    view: IGridView;
+    isMaximized: boolean;
 }
 
 export class Gridview implements IDisposable {
@@ -293,7 +303,8 @@ export class Gridview implements IDisposable {
     private readonly _onDidViewVisibilityChange = new Emitter<void>();
     readonly onDidViewVisibilityChange = this._onDidViewVisibilityChange.event;
 
-    private readonly _onDidMaximizedNodeChange = new Emitter<void>();
+    private readonly _onDidMaximizedNodeChange =
+        new Emitter<MaximizedViewChanged>();
     readonly onDidMaximizedNodeChange = this._onDidMaximizedNodeChange.event;
 
     public get length(): number {
@@ -395,6 +406,8 @@ export class Gridview implements IDisposable {
             this.exitMaximizedView();
         }
 
+        serializeBranchNode(this.getView(), this.orientation);
+
         const hiddenOnMaximize: LeafNode[] = [];
 
         function hideAllViewsBut(parent: BranchNode, exclude: LeafNode): void {
@@ -416,7 +429,10 @@ export class Gridview implements IDisposable {
 
         hideAllViewsBut(this.root, node);
         this._maximizedNode = { leaf: node, hiddenOnMaximize };
-        this._onDidMaximizedNodeChange.fire();
+        this._onDidMaximizedNodeChange.fire({
+            view: node.view,
+            isMaximized: true,
+        });
     }
 
     exitMaximizedView(): void {
@@ -441,27 +457,60 @@ export class Gridview implements IDisposable {
 
         showViewsInReverseOrder(this.root);
 
+        const tmp = this._maximizedNode.leaf;
         this._maximizedNode = undefined;
-        this._onDidMaximizedNodeChange.fire();
+        this._onDidMaximizedNodeChange.fire({
+            view: tmp.view,
+            isMaximized: false,
+        });
     }
 
     public serialize(): SerializedGridview<any> {
+        const maximizedView = this.maximizedView();
+
+        let maxmizedViewLocation: number[] | undefined;
+
+        if (maximizedView) {
+            /**
+             * The minimum information we can get away with in order to serialize a maxmized view is it's location within the grid
+             * which is represented as a branch of indices
+             */
+            maxmizedViewLocation = getGridLocation(maximizedView.element);
+        }
+
         if (this.hasMaximizedView()) {
             /**
-             * do not persist maximized view state
-             * firstly exit any maximized views to ensure the correct dimensions are persisted
+             * the saved layout cannot be in its maxmized state otherwise all of the underlying
+             * view dimensions will be wrong
+             *
+             * To counteract this we temporaily remove the maximized view to compute the serialized output
+             * of the grid before adding back the maxmized view as to not alter the layout from the users
+             * perspective when `.toJSON()` is called
              */
             this.exitMaximizedView();
         }
 
         const root = serializeBranchNode(this.getView(), this.orientation);
 
-        return {
+        const resullt: SerializedGridview<any> = {
             root,
             width: this.width,
             height: this.height,
             orientation: this.orientation,
         };
+
+        if (maxmizedViewLocation) {
+            resullt.maximizedNode = {
+                location: maxmizedViewLocation,
+            };
+        }
+
+        if (maximizedView) {
+            // replace any maximzied view that was removed for serialization purposes
+            this.maximizeView(maximizedView);
+        }
+
+        return resullt;
     }
 
     public dispose(): void {
@@ -502,6 +551,24 @@ export class Gridview implements IDisposable {
             deserializer,
             height
         );
+
+        /**
+         * The deserialied layout must be positioned through this.layout(...)
+         * before any maximizedNode can be positioned
+         */
+        this.layout(json.width, json.height);
+
+        if (json.maximizedNode) {
+            const location = json.maximizedNode.location;
+
+            const [_, node] = this.getNode(location);
+
+            if (!(node instanceof LeafNode)) {
+                return;
+            }
+
+            this.maximizeView(node.view);
+        }
     }
 
     private _deserialize(

packages/docs/sandboxes/react/dockview/demo-dockview/src/app.tsx

@@ -206,6 +206,12 @@ const DockviewDemo = (props: { theme?: string }) => {
             addLogLine(`Panel Moved ${event.panel.id}`);
         });
 
+        event.api.onDidMaximizedGroupChange((event) => {
+            addLogLine(
+                `Group Maximized Changed ${event.view.id} [${event.isMaximized}]`
+            );
+        });
+
         event.api.onDidRemoveGroup((event) => {
             setGroups((_) => {
                 const next = [..._];
@@ -318,6 +324,15 @@ const DockviewDemo = (props: { theme?: string }) => {
                         engineering
                     </span>
                 </button>
+                {showLogs && (
+                    <button
+                        onClick={() => {
+                            setLogLines([]);
+                        }}
+                    >
+                        <span className="material-symbols-outlined">undo</span>
+                    </button>
+                )}
                 <button
                     onClick={() => {
                         setShowLogs(!showLogs);

packages/docs/sandboxes/react/dockview/demo-dockview/src/gridActions.tsx

@@ -112,11 +112,10 @@ export const GridActions = (props: {
 
     const onSave = () => {
         if (props.api) {
-            console.log(props.api.toJSON());
-            localStorage.setItem(
-                'dv-demo-state',
-                JSON.stringify(props.api.toJSON())
-            );
+            const state = props.api.toJSON();
+            console.log(state);
+
+            localStorage.setItem('dv-demo-state', JSON.stringify(state));
         }
     };