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All rights reserved.\n * This file is licensed to you under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License. You may obtain a copy\n * of the License at http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software distributed under\n * the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS\n * OF ANY KIND, either express or implied. See the License for the specific language\n * governing permissions and limitations under the License.\n */\n\nimport {getOwnerDocument} from '../utils/domHelpers';\n\nimport {isIOS} from '../utils/platform';\nimport {runAfterTransition} from '../utils/runAfterTransition';\n\n// Safari on iOS starts selecting text on long press. The only way to avoid this, it seems,\n// is to add user-select: none to the entire page. Adding it to the pressable element prevents\n// that element from being selected, but nearby elements may still receive selection. We add\n// user-select: none on touch start, and remove it again on touch end to prevent this.\n// This must be implemented using global state to avoid race conditions between multiple elements.\n\n// There are three possible states due to the delay before removing user-select: none after\n// pointer up. The 'default' state always transitions to the 'disabled' state, which transitions\n// to 'restoring'. The 'restoring' state can either transition back to 'disabled' or 'default'.\n\n// For non-iOS devices, we apply user-select: none to the pressed element instead to avoid possible\n// performance issues that arise from applying and removing user-select: none to the entire page\n// (see https://github.com/adobe/react-spectrum/issues/1609).\ntype State = 'default' | 'disabled' | 'restoring';\n\n// Note that state only matters here for iOS. Non-iOS gets user-select: none applied to the target element\n// rather than at the document level so we just need to apply/remove user-select: none for each pressed element individually\nlet state: State = 'default';\nlet savedUserSelect = '';\nlet modifiedElementMap = new WeakMap();\n\nexport function disableTextSelection(target?: Element): void {\n if (isIOS()) {\n if (state === 'default') {\n\n const documentObject = getOwnerDocument(target);\n savedUserSelect = documentObject.documentElement.style.webkitUserSelect;\n documentObject.documentElement.style.webkitUserSelect = 'none';\n }\n\n state = 'disabled';\n } else if (target instanceof HTMLElement || target instanceof SVGElement) {\n // If not iOS, store the target's original user-select and change to user-select: none\n // Ignore state since it doesn't apply for non iOS\n let property = 'userSelect' in target.style ? 'userSelect' : 'webkitUserSelect';\n modifiedElementMap.set(target, target.style[property]);\n target.style[property] = 'none';\n }\n}\n\nexport function restoreTextSelection(target?: Element): void {\n if (isIOS()) {\n // If the state is already default, there's nothing to do.\n // If it is restoring, then there's no need to queue a second restore.\n if (state !== 'disabled') {\n return;\n }\n\n state = 'restoring';\n\n // There appears to be a delay on iOS where selection still might occur\n // after pointer up, so wait a bit before removing user-select.\n setTimeout(() => {\n // Wait for any CSS transitions to complete so we don't recompute style\n // for the whole page in the middle of the animation and cause jank.\n runAfterTransition(() => {\n // Avoid race conditions\n if (state === 'restoring') {\n\n const documentObject = getOwnerDocument(target);\n if (documentObject.documentElement.style.webkitUserSelect === 'none') {\n documentObject.documentElement.style.webkitUserSelect = savedUserSelect || '';\n }\n\n savedUserSelect = '';\n state = 'default';\n }\n });\n }, 300);\n } else if (target instanceof HTMLElement || target instanceof SVGElement) {\n // If not iOS, restore the target's original user-select if any\n // Ignore state since it doesn't apply for non iOS\n if (target && modifiedElementMap.has(target)) {\n let targetOldUserSelect = modifiedElementMap.get(target) as string;\n let property = 'userSelect' in target.style ? 'userSelect' : 'webkitUserSelect';\n\n if (target.style[property] === 'none') {\n target.style[property] = targetOldUserSelect;\n }\n\n if (target.getAttribute('style') === '') {\n target.removeAttribute('style');\n }\n modifiedElementMap.delete(target);\n }\n }\n}\n"],"names":[],"version":3,"file":"textSelection.cjs.map"}