This makes it possible to execute `nix-shell` to create the correct environment to build kitty. Use `nix-shell --pure` to eliminate most of the influence of the outside system, e.g. globally installed packages.
This works on NixOS and any Linux or macOS system with the Nix package manager installed.
The build inputs are split into `buildInputs`, `nativeBuildInputs`, `propagatedBuildInputs` and `checkInputs` so it closely resembles 2bb3a9da24/pkgs/applications/terminal-emulators/kitty/default.nix. This makes it easy to port changes between the two files.
On Wayland, some compositors refuse to implement SSDs in which case we draw
primitive CSDs. However, the destructors were called in the wrong order,
leading to a dereference of an already freed object.
While developing the previous PR (https://github.com/kovidgoyal/kitty/pull/3043), I was using more compiler command line arguments, one of which was `-MMD`. This caused the .d file to be created. Without this argument, there is no need to create a temporary directory.
For some reason it can happen that the `UserNotifications` framework exists but the `UserNotifications/UserNotifications.h` header doesn't.
Closes https://github.com/kovidgoyal/kitty/issues/3042.
This allows compiling Objective-C files.
The temporary directory is needed because clang would try to write to `/dev/null.d`, which would obviously fail.
`create_os_window()` calls `get_window_content_scale()` without initializing the `xscale` and `yscale` variables. Instead of initializing them everywhere, where this function is called, just do it once in the function itself.
Found with the Clang Static Analyzer.
Pillow wheel currently not available for python 3.9. So tries to install
from source and fails on missing zlib. So install zlib in brew and make
it available via PKG_CONFIG_PATH. Apparently, this wont be necessary
after Pillow 8, but who knows.
When selecting text by dragging upwards, the "end" of the selection is above the "start". This causes the `selection_has_screen_line()` to never return `true` in this case.
In practice this bug causes the selection to not be cleared when the screen contents under the selection change if it was made by dragging upwards.
