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Peifer ","license":"MIT","homepage":"https://github.com/ObscuritySRL/bun-win32#readme","keywords":["bun","ffi","win32","windows","windowsaccessbridge-64","java-access-bridge","accessibility","jab","bindings","typescript","dll"],"repository":{"type":"git","url":"git://github.com/ObscuritySRL/bun-win32.git","directory":"packages/windowsaccessbridge-64"},"description":"Zero-dependency, zero-overhead Java Access Bridge (WindowsAccessBridge-64.dll) bindings for Bun (FFI) on Windows.","maintainers":[{"name":"obscuritysrl","email":"stev.p@outlook.com"}],"readme":"# @bun-win32/windowsaccessbridge-64\n\nZero-dependency, zero-overhead Java Access Bridge bindings for [Bun](https://bun.sh) on Windows.\n\n## Overview\n\n`@bun-win32/windowsaccessbridge-64` exposes the `WindowsAccessBridge-64.dll` exports using [Bun](https://bun.sh)'s FFI. It provides a single class, `WindowsAccessBridge`, which lazily binds native symbols on first use. You can optionally preload a subset or all symbols up-front via `Preload()`.\n\nThe Java Access Bridge is the bridge that lets Windows assistive technologies read and drive Swing/AWT applications. These bindings cover all 97 exports: window classification, AccessibleContext navigation, text/table/hypertext/value/selection accessors, and the event-callback registration functions.\n\nThe bindings are strongly typed for a smooth DX in TypeScript.\n\n## Features\n\n- [Bun](https://bun.sh)-first ergonomics on Windows 10/11.\n- Direct FFI to `WindowsAccessBridge-64.dll` (window classification, accessible-context inspection, text/table/value queries, event callbacks).\n- In-source docs in `structs/WindowsAccessBridge.ts` with links to the upstream OpenJDK headers.\n- Lazy binding on first call; optional eager preload (`WindowsAccessBridge.Preload()`).\n- No wrapper overhead; calls map 1:1 to native exports.\n- Strongly-typed aliases (see `types/WindowsAccessBridge.ts`).\n\n## Requirements\n\n- [Bun](https://bun.sh) runtime\n- Windows 10 or later\n- `WindowsAccessBridge-64.dll` (installed with any Java runtime; on `PATH`/System32)\n- A running Java application with the Access Bridge enabled (`jabswitch -enable`) to inspect live UI\n\n## Installation\n\n```sh\nbun add @bun-win32/windowsaccessbridge-64\n```\n\n## Quick Start\n\n```ts\nimport WindowsAccessBridge from '@bun-win32/windowsaccessbridge-64';\n\n// 1. Initialize the bridge once.\nWindowsAccessBridge.Windows_run();\n\n// 2. Each Java VM registers its windows with this process by posting messages after\n// Windows_run. Pump the message queue (e.g. via User32 PeekMessageW/DispatchMessageW)\n// for ~1s so registration lands before you classify any window.\n\n// 3. Classify a window and read its root AccessibleContext.\nif (WindowsAccessBridge.isJavaWindow(hWnd)) {\n const vmID = Buffer.alloc(4);\n const context = Buffer.alloc(8);\n WindowsAccessBridge.getAccessibleContextFromHWND(hWnd, vmID.ptr, context.ptr);\n\n const info = Buffer.alloc(6188); // sizeof(AccessibleContextInfo)\n WindowsAccessBridge.getAccessibleContextInfo(vmID.readInt32LE(0), context.readBigUInt64LE(0), info.ptr);\n\n const name = info.toString('utf16le', 0, 2048).replace(/\\0.*$/s, ''); // name[MAX_STRING_SIZE]\n const role = info.toString('utf16le', 4096, 4096 + 512).replace(/\\0.*$/s, ''); // role[SHORT_STRING_SIZE]\n console.log(role, name);\n\n WindowsAccessBridge.releaseJavaObject(vmID.readInt32LE(0), context.readBigUInt64LE(0));\n}\n```\n\n> [!NOTE]\n> AI agents: see `AI.md` for the package binding contract and source-navigation guidance. It explains how to use the package without scanning the entire implementation.\n\n## Examples\n\nRun the included examples:\n\n```sh\nbun run example/jab-inspector.ts # exhaustive Java accessibility-tree diagnostic\nbun run example/accessibility-radar.ts # animated radar that lights up Java windows live\n```\n\n## Notes\n\n- Either rely on lazy binding or call `WindowsAccessBridge.Preload()`.\n- The DLL exports use lower-camelCase internal names (`getAccessibleContextInfo`, `setFocusGainedFP`); signatures follow the OpenJDK `AccessBridgeCalls.h` / `AccessBridgePackages.h` headers.\n- Most query functions round-trip to a live JVM over Windows messages — they need a running Java app and a pumped message loop in the calling process to return data.\n- Windows only. Bun runtime required.\n- **SAL types & naming:** nullability is in the **type** — `Optional` (formally optional, SAL `_*opt_`) and `Nullable` (plain `[in]`/`[out]` the docs say can be NULL), the null sentinel derived from `T` (`null` for pointers `LP*`/`P*`, `0n` for handles/by-value addresses); direction is in the **parameter name** — `_out` (`_Out_`), `_in_out` (`_Inout_`), `_In_` bare. See `AI.md` and the repo `AGENTS.md`.\n","readmeFilename":"README.md"}