{"version":3,"sources":["../src/components/Dialog/utils/scroll.ts"],"sourcesContent":["type ScrollLockState = {\n lockCount: number;\n previousBodyOverflow: string;\n};\n\nconst scrollLockStateByDocument = new WeakMap();\n\n/**\n * Prevents background scrolling while a modal/alert dialog is open by applying\n * `overflow: hidden` to ``. The `` element is intentionally left\n * untouched so host-application styles on the document element are preserved.\n *\n * Nested modal dialogs share a single lock via a reference count.\n */\nexport function lockDocumentScroll(targetDocument: Document): void {\n const previous = scrollLockStateByDocument.get(targetDocument);\n if (previous) {\n previous.lockCount += 1;\n return;\n }\n\n scrollLockStateByDocument.set(targetDocument, {\n lockCount: 1,\n previousBodyOverflow: targetDocument.body.style.overflow,\n });\n\n targetDocument.body.style.overflow = 'visible clip';\n}\n\n/**\n * Restores the document's scroll behavior by reverting the `overflow` style\n * on the `` element to its previous value. This function is typically\n * called when a modal/alert dialog is closed.\n */\nexport function unlockDocumentScroll(targetDocument: Document): void {\n const state = scrollLockStateByDocument.get(targetDocument);\n if (!state) {\n return;\n }\n\n state.lockCount -= 1;\n if (state.lockCount > 0) {\n return;\n }\n\n targetDocument.body.style.overflow = state.previousBodyOverflow;\n scrollLockStateByDocument.delete(targetDocument);\n}\n"],"names":["lockDocumentScroll","unlockDocumentScroll","scrollLockStateByDocument","WeakMap","targetDocument","previous","get","lockCount","set","previousBodyOverflow","body","style","overflow","state","delete"],"mappings":";;;;;;;;;;;IAcgBA,kBAAkB;eAAlBA;;IAoBAC,oBAAoB;eAApBA;;;AA7BhB,MAAMC,4BAA4B,IAAIC;AAS/B,SAASH,mBAAmBI,cAAwB;IACzD,MAAMC,WAAWH,0BAA0BI,GAAG,CAACF;IAC/C,IAAIC,UAAU;QACZA,SAASE,SAAS,IAAI;QACtB;IACF;IAEAL,0BAA0BM,GAAG,CAACJ,gBAAgB;QAC5CG,WAAW;QACXE,sBAAsBL,eAAeM,IAAI,CAACC,KAAK,CAACC,QAAQ;IAC1D;IAEAR,eAAeM,IAAI,CAACC,KAAK,CAACC,QAAQ,GAAG;AACvC;AAOO,SAASX,qBAAqBG,cAAwB;IAC3D,MAAMS,QAAQX,0BAA0BI,GAAG,CAACF;IAC5C,IAAI,CAACS,OAAO;QACV;IACF;IAEAA,MAAMN,SAAS,IAAI;IACnB,IAAIM,MAAMN,SAAS,GAAG,GAAG;QACvB;IACF;IAEAH,eAAeM,IAAI,CAACC,KAAK,CAACC,QAAQ,GAAGC,MAAMJ,oBAAoB;IAC/DP,0BAA0BY,MAAM,CAACV;AACnC"}