8 lines
19 KiB
Text
8 lines
19 KiB
Text
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{
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"version": 3,
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"sources": ["../src/focus-scope.tsx"],
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"sourcesContent": ["import * as React from 'react';\nimport { useComposedRefs } from '@radix-ui/react-compose-refs';\nimport { Primitive } from '@radix-ui/react-primitive';\nimport { useCallbackRef } from '@radix-ui/react-use-callback-ref';\n\nconst AUTOFOCUS_ON_MOUNT = 'focusScope.autoFocusOnMount';\nconst AUTOFOCUS_ON_UNMOUNT = 'focusScope.autoFocusOnUnmount';\nconst EVENT_OPTIONS = { bubbles: false, cancelable: true };\n\ntype FocusableTarget = HTMLElement | { focus(): void };\n\n/* -------------------------------------------------------------------------------------------------\n * FocusScope\n * -----------------------------------------------------------------------------------------------*/\n\nconst FOCUS_SCOPE_NAME = 'FocusScope';\n\ntype FocusScopeElement = React.ComponentRef<typeof Primitive.div>;\ntype PrimitiveDivProps = React.ComponentPropsWithoutRef<typeof Primitive.div>;\ninterface FocusScopeProps extends PrimitiveDivProps {\n /**\n * When `true`, tabbing from last item will focus first tabbable\n * and shift+tab from first item will focus last tababble.\n * @defaultValue false\n */\n loop?: boolean;\n\n /**\n * When `true`, focus cannot escape the focus scope via keyboard,\n * pointer, or a programmatic focus.\n * @defaultValue false\n */\n trapped?: boolean;\n\n /**\n * Event handler called when auto-focusing on mount.\n * Can be prevented.\n */\n onMountAutoFocus?: (event: Event) => void;\n\n /**\n * Event handler called when auto-focusing on unmount.\n * Can be prevented.\n */\n onUnmountAutoFocus?: (event: Event) => void;\n}\n\nconst FocusScope = React.forwardRef<FocusScopeElement, FocusScopeProps>((props, forwardedRef) => {\n const {\n loop = false,\n trapped = false,\n onMountAutoFocus: onMountAutoFocusProp,\n onUnmountAutoFocus: onUnmountAutoFocusProp,\n ...scopeProps\n } = props;\n const [container, setContainer] = React.useState<HTMLElement | null>(null);\n const onMountAutoFocus = useCallbackRef(onMountAutoFocusProp);\n const onUnmountAutoFocus = useCallbackRef(onUnmountAutoFocusProp);\n const lastFocusedElementRef = React.useRef<HTMLElement | null>(null);\n const composedRefs = useComposedRefs(forwardedRef, (node) => setContainer(node));\n\n const focusScope = React.useRef({\n paused: false,\n pause() {\n this.paused = true;\n },\n resume() {\n this.paused = false;\n },\n }).current;\n\n // Takes care of trapping focus if focus is moved outside programmatically for example\n React.useEffect(() => {\n if (trapped) {\n function handleFocusIn(event: FocusEvent) {\n if (focusScope.paused || !container) return;\n const target = event.target as HTMLElement | null;\n if (container.contains(target)) {\n lastFocusedElementRef.current = target;\n } else {\n focus(lastFocusedElementRef.current, { select: true });\n }\n }\n\n function handleFocusOut(event: FocusEvent) {\n if (focusScope.paused || !container) return;\n const relatedTarget = event.relatedTarget as HTMLElement | null;\n\n // A `focusout` event with a `null` `relatedTarget` will happen in at least two cases:\n //\n // 1. When the user switches app/tabs/windows/the browser itself loses focus.\n // 2. In Google Chrome, when the focused element is removed from the DOM.\n //\n // We let the browser do its thing here because:\n //\n // 1. The browser already keeps a memory of what's focused for when the page gets refocused.\n // 2. In Google Chrome, if we try to focus the deleted focused element (as per below), it\n // throws the CPU to 100%, so we avoid doing anything for this reason here too.\n if (relatedTarget === null) return;\n\n // If the focus has moved to an actual legitimate element (`relatedTarget !== null`)\n // that is outside the container, we move focus to the last valid focused element inside.\n if (!container.contains(relatedTarget)) {\n focus(lastFocus
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"names": ["handleFocusIn", "handleFocusOut", "handleMutations", "container"]
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}
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