racket-webview-qt

The Qt WebEngine backend of racket-webview.

Version 0.2.3

This version replaces the shared-library/shared-memory transport with a standalone process interface.

Transport

rktwebview_prg receives line-delimited JSON commands on stdin, writes line-delimited JSON results and events to stdout, and writes all diagnostics to stderr. The existing command numbers and command payloads in rkt_protocol.h are unchanged.

See STDIO-PROTOCOL.md for the transport envelope and shutdown rules.

The former shared library, shared-memory queue, and callback sources remain in the repository for comparison, but they are no longer part of the CMake target.

Build

The CMake target requires Qt Widgets and Qt WebEngineWidgets and builds only:

rktwebview_prg

Previous Qt update

QtWebEngine select popup rendering issues were observed with older Qt 6.x. The native HTML <select> popup could keep growing or repainting while open while the QtWebEngine process remained busy. Upgrading to Qt 6.11.1 resolved this.

Integration test

rktwebview_test starts the built rktwebview_prg with QProcess and tests the stdio handshake, request/result matching, basic webview commands, and clean shutdown. Run it from the build directory:

./rktwebview_test

For a protocol-only test that does not create a window:

./rktwebview_test --protocol-only

Set RKT_WEBVIEW_PRG to test a backend executable outside the test program's directory.