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This reverts commit 9d7c2b8c83506c1f239c840e372058fac603b255. I thought that switching from the JS 'mousedown', 'mousemove' and 'mouseup' events to the corresponding 'pointer*' events would make essentially no difference except that the pointer events would come with more information. But in fact it turns out that there's a fundamental change of semantics. If you press one mouse button down and then, without releasing it, press a second one, then the mouse API will send you this information in the form of two 'mousedown' events, one for each button. But the pointer API will only send you a 'pointerdown' for the first event, when the state of the pointer changes from 'no buttons down' to 'at least one button down'. The second button press will be delivered as a 'pointermove', in which the 'buttons' field is different from its previous value. I'm backing out the migration to PointerEvent for the moment, because that's too complicated for a trivial fix. In simple cases we could easily detect the changed buttons field in the pointermove handler and generate a call to the C side of this front end's mousedown() function, effectively converting the changed JS representation to the one the C was already expecting. But this also has to interact with our one-button support (converting Ctrl and Shift clicks into a different logical button) _and_ with the ad-hoc mechanism we use to avoid delivering buttonless mouse movements to the C side. So getting it right in all cases at once isn't trivial, and I'd rather revert the attempt now and think about it later than commit to getting it all perfect on short notice.
This is the README accompanying the source code to Simon Tatham's puzzle collection. The collection's web site is at <https://www.chiark.greenend.org.uk/~sgtatham/puzzles/>. The puzzle collection is built using CMake <https://cmake.org/>. To compile in the simplest way (on any of Linux, Windows or Mac), run these commands in the source directory: cmake . cmake --build . The manual is provided in Windows Help format for the Windows build; in text format for anyone who needs it; and in HTML for the Mac OS X application and for the web site. It is generated from a Halibut source file (puzzles.but), which is the preferred form for modification. To generate the manual in other formats, rebuild it, or learn about Halibut, visit the Halibut website at <https://www.chiark.greenend.org.uk/~sgtatham/halibut/>.