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winit/CHANGELOG.md
Francesca Frangipane c4b92ebd45
X11: General cleanup (#491) 
* X11: General cleanup

This is almost entirely internal changes, and as usual, doesn't actually
fix any problems people have complained about.

- `XSetInputFocus` can't be called before the window is visible. This
was previously handled by looping (with a sleep) and querying for the
window's state until it was visible. Now we use `XIfEvent`, which blocks
until we receive `VisibilityNotify`. Note that this can't be replaced
with an `XSync` (I tried).
- We now call `XSync` at the end of window creation and check for
errors, assuring that broken windows are never returned. When creating
invisible windows, this is the only time the output buffer is flushed
during the entire window creation process (AFAIK). For visible windows,
`XIfEvent` will generally flush, but window creation has overall been
reduced to the minimum number of flushes.
- `check_errors().expect()` has been a common pattern throughout the
backend, but it seems that people (myself included) didn't make a
distinction between using it after synchronous requests and asynchronous
requests. Now we only use it after async requests if we flush first,
though this still isn't correct (since the request likely hasn't been
processed yet). The only real solution (besides forcing a sync *every
time*) is to handle asynchronous errors *asynchronously*. For future
work, I plan on adding logging, though I don't plan on actually
*handling* those errors; that's more of something to hope for in the
hypothetical async/await XCB paradise.
- We now flush whenever it makes sense to. `util::Flusher` was added to
force contributors to be aware of the output buffer.
- `Window::get_position`, `Window::get_inner_position`,
`Window::get_inner_size`, and `Window::get_outer_size` previously all
required *several* round-trips. On my machine, it took an average of
around 80µs. They've now been reduced to one round-trip each, which
reduces my measurement to 16µs. This was accomplished simply by caching
the frame extents, which are expensive to calculate (due to various
queries and heuristics), but change infrequently and predictably. I
still recommend that application developers use these methods sparingly
and generally prefer storing the values from `Resized`/`Moved`, as
that's zero overhead.
- The above change enabled me to change the `Moved` event to supply
window positions, rather than client area positions. Additionally, we no
longer generate `Moved` for real (as in, not synthetic)
`ConfigureNotify` events. Real `ConfigureNotify` events contain
positions relative to the parent window, which are typically constant
and useless. Since that position would be completely different from the
root-relative positions supplied by synthetic `ConfigureNotify` events
(which are the vast majority of them), that meant real `ConfigureNotify`
events would *always* be detected as the position having changed, so the
resultant `Moved` was multiple levels of misleading. In practice, this
meant a garbage `Moved` would be sent every time the window was resized;
now a resize has to actually change the window's position to be
accompanied by `Moved`.
- Every time we processed an `XI_Enter` event, we would leak 4 bytes via
`util::query_pointer` (`XIQueryPointer`). `XIButtonState` contains a
dynamically-allocated mask field which we weren't freeing. As this event
occurs with fairly high frequency, long-running applications could
easily accumulate substantial leaks. `util::PointerState::drop` now
takes care of this.
- The `util` module has been split up into several sub-modules, as it
was getting rather lengthy. This accounts for a significant part of this
diff, unfortunately.
- Atoms are now cached. Xlib caches them too, so `XInternAtom` wouldn't
typically be a round-trip anyway, but the added complexity is
negligible.
- Switched from `std::sync::Mutex` to `parking_lot::Mutex` (within this
backend). There appears to be no downside to this, but if anyone finds
one, this would be easy to revert.
- The WM name and supported hints are now global to the application, and
are updated upon `ReparentNotify`, which should detect when the WM was
replaced (assuming a reparenting WM was involved, that is). Previously,
these values were per-window and would never update, meaning replacing
the WM could potentially lead to (admittedly very minor) problems.
- The result of `Window2::create_empty_cursor` will now only be used if
it actually succeeds.
- `Window2::load_cursor` no longer re-allocates the cursor name.
- `util::lookup_utf8` previously allocated a 16-byte buffer on the heap.
Now it allocates a 1024-byte buffer on the stack, and falls back to
dynamic allocation if the buffer is too small. This base buffer size is
admittedly gratuitous, but less so if you're using IME.
- `with_c_str` was finally removed.
- Added `util::Format` enum to help prevent goofs when dealing with
format arguments.
- `util::get_property`, something I added way back in my first winit PR,
only calculated offsets correctly for `util::Format::Char`. This was
concealed by the accomodating buffer size, as it would be very rare for
the offset to be needed; however, testing with a buffer size of 1,
`util::Format::Long` would read from the same offset multiple times, and
`util::Format::Short` would miss data. This function now works correctly
for all formats, relying on the simple fact that the offset increases by
the buffer size on each iteration. We also account for the extra byte
that `XGetWindowProperty` allocates at the end of the buffer, and copy
data from the buffer instead of moving it and taking ownership of the
pointer.
- Drag and drop now reliably works in release mode. This is presumably
related to the `util::get_property` changes.
- `util::change_property` now exists, which should make it easier to add
features in the future.
- The `EventsLoop` device map is no longer in a mutex.
- `XConnection` now implements `Debug`.
- Valgrind no longer complains about anything related to winit (with
either the system allocator or jemalloc, though "not having valgrind
complain about jemalloc" isn't something to strive for).

* X11: Add better diagnostics when initialization fails

* X11: Handle XIQueryDevice failure

* X11: Use correct types in error handler
2018-05-03 09:15:49 -04:00

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# Unreleased
- Created the `Copy`, `Paste` and `Cut` `VirtualKeyCode`s and added support for them on X11 and Wayland
- Fix `.with_decorations(false)` in macOS
- On Mac, `NSWindow` and supporting objects might be alive long after they were `closed` which resulted in apps consuming more heap then needed. Mainly it was affecting multi window applications. Not expecting any user visible change of behaviour after the fix.
- Fix regression of Window platform extensions for macOS where `NSFullSizeContentViewWindowMask` was not being correctly applied to `.fullsize_content_view`.
- Corrected `get_position` on Windows to be relative to the screen rather than to the taskbar.
- Corrected `Moved` event on Windows to use position values equivalent to those returned by `get_position`. It previously supplied client area positions instead of window positions, and would additionally interpret negative values as being very large (around `u16::MAX`).
- Implemented `Moved` event on macOS.
- On X11, the `Moved` event correctly use window positions rather than client area positions. Additionally, a stray `Moved` that unconditionally accompanied `Resized` with the client area position relative to the parent has been eliminated; `Moved` is still received alongside `Resized`, but now only once and always correctly.
- On Windows, implemented all variants of `DeviceEvent` other than `Text`. Mouse `DeviceEvent`s are now received even if the window isn't in the foreground.
- `DeviceId` on Windows is no longer a unit struct, and now contains a `u32`. For `WindowEvent`s, this will always be 0, but on `DeviceEvent`s it will be the handle to that device. `DeviceIdExt::get_persistent_identifier` can be used to acquire a unique identifier for that device that persists across replugs/reboots/etc.
- Corrected `run_forever` on X11 to stop discarding `Awakened` events.
- Various safety and correctness improvements to the X11 backend internals.
- Fixed memory leak on X11 every time the mouse entered the window.
- On X11, drag and drop now works reliably in release mode.
# Version 0.13.1 (2018-04-26)
- Ensure necessary `x11-dl` version is used.
# Version 0.13.0 (2018-04-25)
- Implement `WindowBuilder::with_maximized`, `Window::set_fullscreen`, `Window::set_maximized` and `Window::set_decorations` for MacOS.
- Implement `WindowBuilder::with_maximized`, `Window::set_fullscreen`, `Window::set_maximized` and `Window::set_decorations` for Windows.
- On Windows, `WindowBuilder::with_fullscreen` no longer changing monitor display resolution.
- Overhauled X11 window geometry calculations. `get_position` and `set_position` are more universally accurate across different window managers, and `get_outer_size` actually works now.
- Fixed SIGSEGV/SIGILL crashes on macOS caused by stabilization of the `!` (never) type.
- Implement `WindowEvent::HiDPIFactorChanged` for macOS
- On X11, input methods now work completely out of the box, no longer requiring application developers to manually call `setlocale`. Additionally, when input methods are started, stopped, or restarted on the server end, it's correctly handled.
- Implemented `Refresh` event on Windows.
- Properly calculate the minimum and maximum window size on Windows, including window decorations.
- Map more `MouseCursor` variants to cursor icons on Windows.
- Corrected `get_position` on macOS to return outer frame position, not content area position.
- Corrected `set_position` on macOS to set outer frame position, not content area position.
- Added `get_inner_position` method to `Window`, which gets the position of the window's client area. This is implemented on all applicable platforms (all desktop platforms other than Wayland, where this isn't possible).
- **Breaking:** the `Closed` event has been replaced by `CloseRequested` and `Destroyed`. To migrate, you typically just need to replace all usages of `Closed` with `CloseRequested`; see example programs for more info. The exception is iOS, where `Closed` must be replaced by `Destroyed`.
# Version 0.12.0 (2018-04-06)
- Added subclass to macos windows so they can be made resizable even with no decorations.
- Dead keys now work properly on X11, no longer resulting in a panic.
- On X11, input method creation first tries to use the value from the user's `XMODIFIERS` environment variable, so application developers should no longer need to manually call `XSetLocaleModifiers`. If that fails, fallbacks are tried, which should prevent input method initialization from ever outright failing.
- Fixed thread safety issues with input methods on X11.
- Add support for `Touch` for win32 backend.
- Fixed `Window::get_inner_size` and friends to return the size in pixels instead of points when using HIDPI displays on OSX.
# Version 0.11.3 (2018-03-28)
- Added `set_min_dimensions` and `set_max_dimensions` methods to `Window`, and implemented on Windows, X11, Wayland, and OSX.
- On X11, dropping a `Window` actually closes it now, and clicking the window's × button (or otherwise having the WM signal to close it) will result in the window closing.
- Added `WindowBuilderExt` methods for macos: `with_titlebar_transparent`,
`with_title_hidden`, `with_titlebar_buttons_hidden`,
`with_fullsize_content_view`.
- Mapped X11 numpad keycodes (arrows, Home, End, PageUp, PageDown, Insert and Delete) to corresponding virtual keycodes
# Version 0.11.2 (2018-03-06)
- Impl `Hash`, `PartialEq`, and `Eq` for `events::ModifiersState`.
- Implement `MonitorId::get_hidpi_factor` for MacOS.
- Added method `os::macos::MonitorIdExt::get_nsscreen() -> *mut c_void` that gets a `NSScreen` object matching the monitor ID.
- Send `Awakened` event on Android when event loop is woken up.
# Version 0.11.1 (2018-02-19)
- Fixed windows not receiving mouse events when click-dragging the mouse outside the client area of a window, on Windows platforms.
- Added method `os::android::EventsLoopExt:set_suspend_callback(Option<Box<Fn(bool) -> ()>>)` that allows glutin to register a callback when a suspend event happens
# Version 0.11.0 (2018-02-09)
- Implement `MonitorId::get_dimensions` for Android.
- Added method `os::macos::WindowBuilderExt::with_movable_by_window_background(bool)` that allows to move a window without a titlebar - `with_decorations(false)`
- Implement `Window::set_fullscreen`, `Window::set_maximized` and `Window::set_decorations` for Wayland.
- Added `Caret` as VirtualKeyCode and support OSX ^-Key with german input.
# Version 0.10.1 (2018-02-05)
*Yanked*
# Version 0.10.0 (2017-12-27)
- Add support for `Touch` for emscripten backend.
- Added support for `DroppedFile`, `HoveredFile`, and `HoveredFileCancelled` to X11 backend.
- **Breaking:** `unix::WindowExt` no longer returns pointers for things that aren't actually pointers; `get_xlib_window` now returns `Option<std::os::raw::c_ulong>` and `get_xlib_screen_id` returns `Option<std::os::raw::c_int>`. Additionally, methods that previously returned `libc::c_void` have been changed to return `std::os::raw::c_void`, which are not interchangeable types, so users wanting the former will need to explicitly cast.
- Added `set_decorations` method to `Window` to allow decorations to be toggled after the window is built. Presently only implemented on X11.
- Raised the minimum supported version of Rust to 1.20 on MacOS due to usage of associated constants in new versions of cocoa and core-graphics.
- Added `modifiers` field to `MouseInput`, `MouseWheel`, and `CursorMoved` events to track the modifiers state (`ModifiersState`).
- Fixed the emscripten backend to return the size of the canvas instead of the size of the window.
# Version 0.9.0 (2017-12-01)
- Added event `WindowEvent::HiDPIFactorChanged`.
- Added method `MonitorId::get_hidpi_factor`.
- Deprecated `get_inner_size_pixels` and `get_inner_size_points` methods of `Window` in favor of
`get_inner_size`.
- **Breaking:** `EventsLoop` is `!Send` and `!Sync` because of platform-dependant constraints,
but `Window`, `WindowId`, `DeviceId` and `MonitorId` guaranteed to be `Send`.
- `MonitorId::get_position` now returns `(i32, i32)` instead of `(u32, u32)`.
- Rewrite of the wayland backend to use wayland-client-0.11
- Support for dead keys on wayland for keyboard utf8 input
- Monitor enumeration on Windows is now implemented using `EnumDisplayMonitors` instead of
`EnumDisplayDevices`. This changes the value returned by `MonitorId::get_name()`.
- On Windows added `MonitorIdExt::hmonitor` method
- Impl `Clone` for `EventsLoopProxy`
- `EventsLoop::get_primary_monitor()` on X11 will fallback to any available monitor if no primary is found
- Support for touch event on wayland
- `WindowEvent`s `MouseMoved`, `MouseEntered`, and `MouseLeft` have been renamed to
`CursorMoved`, `CursorEntered`, and `CursorLeft`.
- New `DeviceEvent`s added, `MouseMotion` and `MouseWheel`.
- Send `CursorMoved` event after `CursorEntered` and `Focused` events.
- Add support for `ModifiersState`, `MouseMove`, `MouseInput`, `MouseMotion` for emscripten backend.
# Version 0.8.3 (2017-10-11)
- Fixed issue of calls to `set_inner_size` blocking on Windows.
- Mapped `ISO_Left_Tab` to `VirtualKeyCode::Tab` to make the key work with modifiers
- Fixed the X11 backed on 32bit targets
# Version 0.8.2 (2017-09-28)
- Uniformize keyboard scancode values accross Wayland and X11 (#297).
- Internal rework of the wayland event loop
- Added method `os::linux::WindowExt::is_ready`
# Version 0.8.1 (2017-09-22)
- Added various methods to `os::linux::EventsLoopExt`, plus some hidden items necessary to make
glutin work.
# Version 0.8.0 (2017-09-21)
- Added `Window::set_maximized`, `WindowAttributes::maximized` and `WindowBuilder::with_maximized`.
- Added `Window::set_fullscreen`.
- Changed `with_fullscreen` to take a `Option<MonitorId>` instead of a `MonitorId`.
- Removed `MonitorId::get_native_identifer()` in favor of platform-specific traits in the `os`
module.
- Changed `get_available_monitors()` and `get_primary_monitor()` to be methods of `EventsLoop`
instead of stand-alone methods.
- Changed `EventsLoop` to be tied to a specific X11 or Wayland connection.
- Added a `os::linux::EventsLoopExt` trait that makes it possible to configure the connection.
- Fixed the emscripten code, which now compiles.
- Changed the X11 fullscreen code to use `xrandr` instead of `xxf86vm`.
- Fixed the Wayland backend to produce `Refresh` event after window creation.
- Changed the `Suspended` event to be outside of `WindowEvent`.
- Fixed the X11 backend sometimes reporting the wrong virtual key (#273).
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