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Pointer events set button only on press and release, so wsap_term tracked
held buttons itself to tell a drag from a hover.
yasl_pointer_event.buttons now holds a YASL_BUTTON_BIT() mask of the buttons
held after each event. The common input queue tracks it from the DOWN and
UP events it queues, and clears it on INPUT_RESET and on allocation
failure. Wayland also clears it on leave, since the compositor sends leave
during a press only when it takes the pointer and no release follows. X11
and Cocoa keep it, because they deliver motion and the release to the
pressed window after leave.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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wsap_term runs its own eventfds to wake the loop from its pty worker and
accessibility threads, and its own signalfd or self-pipe per platform.
yasl_loop_kick() is now documented as safe from any thread and from a
signal handler. yasl_loop_post() queues a function to run on the owning
thread during a later step. yasl_loop_watch_signals() installs a
process-wide SA_RESTART handler per signal that records the signal and
kicks the loop, so callbacks run on the loop thread on every platform
without touching thread masks.
Cocoa dispatch waited only for AppKit events, so kicks, posts, and fd
watches could not end an indefinite wait, and yasl_post_event() did not
wake yasl_run(). While waiting, Cocoa now mirrors the loop's descriptors
in a kqueue whose run loop source posts a wake event. If kqueue rejects a
descriptor, the wait is bounded to 10 ms.
The Cocoa change is not built or run here; it needs a macOS check.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Without yasl_app_desc.event, a close request had nowhere to go and the
window stayed open. The runner now stops instead, so hello drops its
event callback.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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yasl_surface_set_pointer_mode(YASL_POINTER_RELATIVE) now takes a
persistent zwp_locked_pointer_v1 on the surface and hides its cursor.
While the compositor keeps the lock engaged, zwp_relative_pointer_v1
motion is pushed as POINTER_MOTION with pos frozen and delta in device
pixels. When the lock disengages, as on focus loss, motion is absolute
again with a delta derived by the input queue.
The lock follows the pointer's seat: it moves to another seat when its
seat loses the pointer, and is released on NORMAL and on surface
destruction. Compositors without both protocols return false.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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A new optional yasl_app_desc.window spec makes yasl_run() create that
toplevel and request its first frame before init(), which is now
optional too. If creation fails, yasl_run() closes the display and
returns an error without calling init().
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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The core input queue and the yasl_run() runner each had their own event
type, and the runner translated one into the other. Both now share
struct yasl_event in <yasl/yasl.h>: yasl_surface_poll_event() returns the
same events the app event callback receives, so the runner forwards them
unchanged.
Pointer input becomes POINTER_DOWN/UP/MOTION/SCROLL/LEAVE with a named
yasl_pointer_button and a motion delta computed in the input queue. TEXT,
PASTE and DROP share one text payload, scale changes fold into
WINDOW_RESIZE, and every event carries a monotonic time_ns.
yasl_surface_set_mouse_mode() is replaced by
yasl_surface_set_pointer_mode(); no backend implements relative mode yet.
The export check now only counts YASL_API declarations, so function
pointer fields returning enum yasl_app_result are not mistaken for
exports.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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and drag-and-drop
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game examples
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- Add include/yasl/native/{wayland,cocoa,x11}.h with type-safe handle accessors.
- Unify drag-and-drop and window carry support across Wayland, X11, and Cocoa.
- Preserve full ABI compatibility for capability flags.
- Install native headers conditionally based on enabled backend.
- Include missing tablet example and backend test suites.
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Separate loop/timer and native interoperability APIs from the portable surface header. Unify dispatch, geometry queries, and timer callbacks; keep framebuffer bookkeeping and frame clocks private, and hide implementation symbols.
Update backends, documentation, examples, and API/integration coverage. Verify exports, strict C/C++ installed consumers, and normal plus ASan/UBSan suites.
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and Cocoa
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- Implement runtime backend selection (Wayland, X11, Cocoa)
- Add native X11 backend with clipboard, keyboard, mouse, and placement
- Integrate multi-backend integration tests running under Weston and Xwayland
- Retain zero-hole struct packing, branchless ALU/LUT primitives, and paced event loop
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yasl_surface
- Compact yasl_mouse_event from 36B to 32B (half a cacheline, 0 holes)
- Compact yasl_input_event from 56B to 48B (0 holes)
- Reduce yasl_surface by 2,048 bytes (shaving 32 full cachelines per surface)
- Optimize UTF-8 sanitize with vectorized validation fast-path
- Fast-path MIME prefix match in clipboard transfers
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- Fix Wayland event loop lockout by properly decoupling read arming and adding poll-backed dispatching
- Support standalone display lifecycle without requiring caller to manage a loop
- Eliminate alignment holes across yasl_surface, yasl_display, seat, touch_point, and conn_drag using pahole
- Replace branching state/button decoders with compile-time locked LUTs and branchless bitwise operations
- Accelerate UTF-8 validation with 64-bit word scanning for ASCII runs
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A minimal, modern desktop window surface library in C.
Supports Wayland on Linux and Cocoa/Metal on macOS with
presentation timing, fractional scaling, IME, and CSD.
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