environment manager (#1784)

This PR extracts the environment manager from #1778.

### Change Type

- [x] `major` — Breaking change

### Release Notes

- [editor] Move environment flags to environment manager

packages/editor/api-report.md

@@ -630,6 +630,7 @@ export class Editor extends EventEmitter<TLEventMap> {
     // (undocumented)
     duplicateShapes(ids: TLShapeId[], offset?: VecLike): this;
     get editingShapeId(): null | TLShapeId;
+    readonly environment: EnvironmentManager;
     get erasingShapeIds(): TLShapeId[];
     get erasingShapeIdsSet(): Set<TLShapeId>;
     // @internal (undocumented)
@@ -805,12 +806,8 @@ export class Editor extends EventEmitter<TLEventMap> {
     isAncestorSelected(id: TLShapeId): boolean;
     // (undocumented)
     isAncestorSelected(shape: TLShape): boolean;
-    readonly isAndroid: boolean;
-    readonly isChromeForIos: boolean;
-    readonly isFirefox: boolean;
     isIn(path: string): boolean;
     isInAny(...paths: string[]): boolean;
-    readonly isIos: boolean;
     get isMenuOpen(): boolean;
     isPointInShape(shape: TLShape, point: VecLike, opts?: {
         margin?: number;
@@ -821,7 +818,6 @@ export class Editor extends EventEmitter<TLEventMap> {
         margin?: number;
         hitInside?: boolean;
     }): boolean;
-    readonly isSafari: boolean;
     isShapeInPage(shape: TLShape, pageId?: TLPageId): boolean;
     // (undocumented)
     isShapeInPage(shapeId: TLShapeId, pageId?: TLPageId): boolean;

packages/editor/src/lib/editor/Editor.ts

@@ -103,6 +103,7 @@ import { arrowBindingsIndex } from './derivations/arrowBindingsIndex'
 import { parentsToChildren } from './derivations/parentsToChildren'
 import { deriveShapeIdsInCurrentPage } from './derivations/shapeIdsInCurrentPage'
 import { ClickManager } from './managers/ClickManager'
+import { EnvironmentManager } from './managers/EnvironmentManager'
 import { HistoryManager } from './managers/HistoryManager'
 import { SnapManager } from './managers/SnapManager'
 import { TextManager } from './managers/TextManager'
@@ -239,19 +240,7 @@ export class Editor extends EventEmitter<TLEventMap> {
 			this.root.children![Tool.id] = new Tool(this, this.root)
 		}
 
-		if (typeof window !== 'undefined' && 'navigator' in window) {
-			this.isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent)
-			this.isIos = !!navigator.userAgent.match(/iPad/i) || !!navigator.userAgent.match(/iPhone/i)
-			this.isChromeForIos = /crios.*safari/i.test(navigator.userAgent)
-			this.isFirefox = /firefox/i.test(navigator.userAgent)
-			this.isAndroid = /android/i.test(navigator.userAgent)
-		} else {
-			this.isSafari = false
-			this.isIos = false
-			this.isChromeForIos = false
-			this.isFirefox = false
-			this.isAndroid = false
-		}
+		this.environment = new EnvironmentManager(this)
 
 		this.store.onBeforeDelete = (record) => {
 			if (record.typeName === 'shape') {
@@ -412,39 +401,11 @@ export class Editor extends EventEmitter<TLEventMap> {
 	readonly textMeasure: TextManager
 
 	/**
-	 * Whether the editor is running in Safari.
+	 * A manager for the editor's environment.
 	 *
 	 * @public
 	 */
-	readonly isSafari: boolean
-
-	/**
-	 * Whether the editor is running on iOS.
-	 *
-	 * @public
-	 */
-	readonly isIos: boolean
-
-	/**
-	 * Whether the editor is running on iOS.
-	 *
-	 * @public
-	 */
-	readonly isChromeForIos: boolean
-
-	/**
-	 * Whether the editor is running on Firefox.
-	 *
-	 * @public
-	 */
-	readonly isFirefox: boolean
-
-	/**
-	 * Whether the editor is running on Android.
-	 *
-	 * @public
-	 */
-	readonly isAndroid: boolean
+	readonly environment: EnvironmentManager
 
 	/**
 	 * The current HTML element containing the editor.

packages/editor/src/lib/editor/managers/EnvironmentManager.ts

@@ -0,0 +1,54 @@
+import { Editor } from '../Editor'
+
+export class EnvironmentManager {
+	constructor(public editor: Editor) {
+		if (typeof window !== 'undefined' && 'navigator' in window) {
+			this.isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent)
+			this.isIos = !!navigator.userAgent.match(/iPad/i) || !!navigator.userAgent.match(/iPhone/i)
+			this.isChromeForIos = /crios.*safari/i.test(navigator.userAgent)
+			this.isFirefox = /firefox/i.test(navigator.userAgent)
+			this.isAndroid = /android/i.test(navigator.userAgent)
+		} else {
+			this.isSafari = false
+			this.isIos = false
+			this.isChromeForIos = false
+			this.isFirefox = false
+			this.isAndroid = false
+		}
+	}
+
+	/**
+	 * Whether the editor is running in Safari.
+	 *
+	 * @public
+	 */
+	readonly isSafari: boolean
+
+	/**
+	 * Whether the editor is running on iOS.
+	 *
+	 * @public
+	 */
+	readonly isIos: boolean
+
+	/**
+	 * Whether the editor is running on iOS.
+	 *
+	 * @public
+	 */
+	readonly isChromeForIos: boolean
+
+	/**
+	 * Whether the editor is running on Firefox.
+	 *
+	 * @public
+	 */
+	readonly isFirefox: boolean
+
+	/**
+	 * Whether the editor is running on Android.
+	 *
+	 * @public
+	 */
+	readonly isAndroid: boolean
+}

packages/editor/src/lib/hooks/useCoarsePointer.ts

@@ -7,7 +7,11 @@ export function useCoarsePointer() {
 		// This is a workaround for a Firefox bug where we don't correctly
 		// detect coarse VS fine pointer. For now, let's assume that you have a fine
 		// pointer if you're on Firefox on desktop.
-		if (editor.isFirefox && !editor.isAndroid && !editor.isIos) {
+		if (
+			editor.environment.isFirefox &&
+			!editor.environment.isAndroid &&
+			!editor.environment.isIos
+		) {
 			editor.updateInstanceState({ isCoarsePointer: false })
 			return
 		}

packages/tldraw/src/lib/shapes/arrow/ArrowShapeUtil.tsx

@@ -495,7 +495,7 @@ export class ArrowShapeUtil extends ShapeUtil<TLArrowShape> {
 
 		// eslint-disable-next-line react-hooks/rules-of-hooks
 		const changeIndex = React.useMemo<number>(() => {
-			return this.editor.isSafari ? (globalRenderIndex += 1) : 0
+			return this.editor.environment.isSafari ? (globalRenderIndex += 1) : 0
 			// eslint-disable-next-line react-hooks/exhaustive-deps
 		}, [shape])
 

packages/tldraw/src/lib/shapes/shared/defaultStyleDefs.tsx

@@ -250,7 +250,7 @@ function PatternFillDefForCanvas() {
 	const { defs, isReady } = usePattern()
 
 	useEffect(() => {
-		if (isReady && editor.isSafari) {
+		if (isReady && editor.environment.isSafari) {
 			const htmlLayer = findHtmlLayerParent(containerRef.current!)
 			if (htmlLayer) {
 				// Wait for `patternContext` to be picked up

packages/tldraw/src/lib/ui/components/PageMenu/PageMenu.tsx

@@ -379,7 +379,7 @@ export const PageMenu = function PageMenu() {
 												item={page}
 												listSize={pages.length}
 												onRename={() => {
-													if (editor.isIos) {
+													if (editor.environment.isIos) {
 														const name = window.prompt('Rename page', page.name)
 														if (name && name !== page.name) {
 															editor.renamePage(page.id, name)

packages/tldraw/src/lib/ui/hooks/usePrint.ts

@@ -156,10 +156,10 @@ export function usePrint() {
 			}
 
 			function triggerPrint() {
-				if (editor.isChromeForIos) {
+				if (editor.environment.isChromeForIos) {
 					beforePrintHandler()
 					window.print()
-				} else if (editor.isSafari) {
+				} else if (editor.environment.isSafari) {
 					beforePrintHandler()
 					document.execCommand('print', false)
 				} else {