slint/api/cpp/cbindgen.rs
Olivier Goffart de9eb69f60 Fix C++ compilation
After adding an Image in a builtin struct, some code and include need to
be moved a bit around
2025-06-26 18:45:37 +02:00

1032 lines
37 KiB
Rust

// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
use anyhow::Context;
use std::io::{BufWriter, Write};
use std::path::{Path, PathBuf};
// cSpell: ignore compat constexpr corelib deps sharedvector pathdata
fn enums(path: &Path) -> anyhow::Result<()> {
let mut enums_priv = BufWriter::new(
std::fs::File::create(path.join("slint_enums_internal.h"))
.context("Error creating slint_enums_internal.h file")?,
);
writeln!(enums_priv, "#pragma once")?;
writeln!(enums_priv, "// This file is auto-generated from {}", file!())?;
writeln!(enums_priv, "#include \"slint_enums.h\"")?;
writeln!(enums_priv, "namespace slint::cbindgen_private {{")?;
let mut enums_pub = BufWriter::new(
std::fs::File::create(path.join("slint_enums.h"))
.context("Error creating slint_enums.h file")?,
);
writeln!(enums_pub, "#pragma once")?;
writeln!(enums_pub, "// This file is auto-generated from {}", file!())?;
writeln!(enums_pub, "namespace slint {{")?;
macro_rules! enum_file {
(PointerEventButton) => {{
writeln!(enums_priv, "using slint::PointerEventButton;")?;
&mut enums_pub
}};
(AccessibleRole) => {{
writeln!(enums_priv, "using slint::testing::AccessibleRole;")?;
&mut enums_pub
}};
($_:ident) => {
&mut enums_priv
};
}
macro_rules! enum_sub_namespace {
(AccessibleRole) => {{
Some("testing")
}};
($_:ident) => {
None
};
}
macro_rules! print_enums {
($( $(#[doc = $enum_doc:literal])* $(#[non_exhaustive])? enum $Name:ident { $( $(#[doc = $value_doc:literal])* $Value:ident,)* })*) => {
$(
let file = enum_file!($Name);
let namespace: Option<&'static str> = enum_sub_namespace!($Name);
if let Some(ns) = namespace {
writeln!(file, "namespace {} {{", ns)?;
}
$(writeln!(file, "///{}", $enum_doc)?;)*
writeln!(file, "enum class {} {{", stringify!($Name))?;
$(
$(writeln!(file, " ///{}", $value_doc)?;)*
writeln!(file, " {},", stringify!($Value).trim_start_matches("r#"))?;
)*
writeln!(file, "}};")?;
if namespace.is_some() {
writeln!(file, "}}")?;
}
)*
}
}
i_slint_common::for_each_enums!(print_enums);
writeln!(enums_pub, "}}")?;
writeln!(enums_priv, "}}")?;
// Print the key codes constants
// This is not an enum, but fits well in that file
writeln!(
enums_pub,
r#"
/// This namespace contains constants for each special non-printable key.
///
/// Each constant can be converted to SharedString.
/// The constants are meant to be used with the slint::Window::dispatch_key_press_event() and
/// slint::Window::dispatch_key_release_event() functions.
///
/// Example:
/// ```
/// window.dispatch_key_press_event(slint::platform::key_codes::Tab);
/// ```
namespace slint::platform::key_codes {{
"#
)?;
macro_rules! print_key_codes {
($($char:literal # $name:ident # $($qt:ident)|* # $($winit:ident $(($_pos:ident))?)|* # $($_xkb:ident)|*;)*) => {
$(
writeln!(enums_pub, "/// A constant that represents the key code to be used in slint::Window::dispatch_key_press_event()")?;
writeln!(enums_pub, r#"constexpr std::u8string_view {} = u8"\u{:04x}";"#, stringify!($name), $char as u32)?;
)*
};
}
i_slint_common::for_each_special_keys!(print_key_codes);
writeln!(enums_pub, "}}")?;
Ok(())
}
fn builtin_structs(path: &Path) -> anyhow::Result<()> {
let mut structs_pub = BufWriter::new(
std::fs::File::create(path.join("slint_builtin_structs.h"))
.context("Error creating slint_builtin_structs.h file")?,
);
writeln!(structs_pub, "#pragma once")?;
writeln!(structs_pub, "// This file is auto-generated from {}", file!())?;
writeln!(structs_pub, "namespace slint {{")?;
let mut structs_priv = BufWriter::new(
std::fs::File::create(path.join("slint_builtin_structs_internal.h"))
.context("Error creating slint_builtin_structs_internal.h file")?,
);
writeln!(structs_priv, "#pragma once")?;
writeln!(structs_priv, "// This file is auto-generated from {}", file!())?;
writeln!(structs_priv, "#include \"slint_builtin_structs.h\"")?;
writeln!(structs_priv, "#include \"slint_enums_internal.h\"")?;
writeln!(structs_priv, "#include \"slint_point.h\"")?;
writeln!(structs_priv, "#include \"slint_image.h\"")?;
writeln!(structs_priv, "namespace slint::cbindgen_private {{")?;
writeln!(structs_priv, "enum class KeyEventType : uint8_t;")?;
macro_rules! struct_file {
(StandardListViewItem) => {{
writeln!(structs_priv, "using slint::StandardListViewItem;")?;
&mut structs_pub
}};
($_:ident) => {
&mut structs_priv
};
}
macro_rules! print_structs {
($(
$(#[doc = $struct_doc:literal])*
$(#[non_exhaustive])?
$(#[derive(Copy, Eq)])?
struct $Name:ident {
@name = $inner_name:literal
export {
$( $(#[doc = $pub_doc:literal])* $pub_field:ident : $pub_type:ty, )*
}
private {
$( $(#[doc = $pri_doc:literal])* $pri_field:ident : $pri_type:ty, )*
}
}
)*) => {
$(
let file = struct_file!($Name);
$(writeln!(file, "///{}", $struct_doc)?;)*
writeln!(file, "struct {} {{", stringify!($Name))?;
$(
$(writeln!(file, " ///{}", $pub_doc)?;)*
let pub_type = match stringify!($pub_type) {
"i32" => "int32_t",
"f32" | "Coord" => "float",
other => other,
};
writeln!(file, " {} {};", pub_type, stringify!($pub_field))?;
)*
$(
$(writeln!(file, " ///{}", $pri_doc)?;)*
let pri_type = stringify!($pri_type).replace(' ', "");
let pri_type = match pri_type.as_str() {
"usize" => "uintptr_t",
"crate::animations::Instant" => "uint64_t",
// This shouldn't be accessed by the C++ anyway, just need to have the same ABI in a struct
"Option<i32>" => "std::pair<int32_t, int32_t>",
"Option<core::ops::Range<i32>>" => "std::tuple<int32_t, int32_t, int32_t>",
other => other,
};
writeln!(file, " {} {};", pri_type, stringify!($pri_field))?;
)*
writeln!(file, " /// \\private")?;
writeln!(file, " {}", format!("friend bool operator==(const {name}&, const {name}&) = default;", name = stringify!($Name)))?;
writeln!(file, " /// \\private")?;
writeln!(file, " {}", format!("friend bool operator!=(const {name}&, const {name}&) = default;", name = stringify!($Name)))?;
writeln!(file, "}};")?;
)*
};
}
i_slint_common::for_each_builtin_structs!(print_structs);
writeln!(structs_priv, "}}")?;
writeln!(structs_pub, "}}")?;
Ok(())
}
fn ensure_cargo_rerun_for_crate(
crate_dir: &Path,
dependencies: &mut Vec<PathBuf>,
) -> anyhow::Result<()> {
dependencies.push(crate_dir.to_path_buf());
for entry in std::fs::read_dir(crate_dir)? {
let entry = entry?;
if entry.path().extension().is_some_and(|e| e == "rs") {
dependencies.push(entry.path());
}
}
Ok(())
}
fn default_config() -> cbindgen::Config {
let mut config = cbindgen::Config::default();
config.macro_expansion.bitflags = true;
config.pragma_once = true;
config.include_version = true;
config.namespaces = Some(vec!["slint".into(), "cbindgen_private".into()]);
config.line_length = 100;
config.tab_width = 4;
// Note: we might need to switch to C if we need to generate bindings for language that needs C headers
config.language = cbindgen::Language::Cxx;
config.cpp_compat = true;
config.documentation = true;
config.export = cbindgen::ExportConfig {
rename: [
("Callback".into(), "private_api::CallbackHelper".into()),
("VoidArg".into(), "void".into()),
("FocusReasonArg".into(), "FocusReason".into()),
("KeyEventArg".into(), "KeyEvent".into()),
("PointerEventArg".into(), "PointerEvent".into()),
("DropEventArg".into(), "DropEvent".into()),
("PointerScrollEventArg".into(), "PointerScrollEvent".into()),
("PointArg".into(), "slint::LogicalPosition".into()),
("FloatArg".into(), "float".into()),
("IntArg".into(), "int".into()),
("MenuEntryArg".into(), "MenuEntry".into()),
// Note: these types are not the same, but they are only used in callback return types that are only used in C++ (set and called)
// therefore it is ok to reinterpret_cast
("MenuEntryModel".into(), "std::shared_ptr<slint::Model<MenuEntry>>".into()),
("Coord".into(), "float".into()),
]
.iter()
.cloned()
.collect(),
..Default::default()
};
config.defines = [
("target_pointer_width = 64".into(), "SLINT_TARGET_64".into()),
("target_pointer_width = 32".into(), "SLINT_TARGET_32".into()),
// Disable any wasm guarded code in C++, too - so that there are no gaps in enums.
("target_arch = wasm32".into(), "SLINT_TARGET_WASM".into()),
("target_os = android".into(), "__ANDROID__".into()),
// Disable Rust WGPU specific API feature
("feature = unstable-wgpu-24".into(), "SLINT_DISABLED_CODE".into()),
]
.iter()
.cloned()
.collect();
config.structure.associated_constants_in_body = true;
config.constant.allow_constexpr = true;
config
}
fn gen_item_declarations(items: &[&str]) -> String {
format!(
r#"
namespace slint::private_api {{
#define SLINT_DECL_ITEM(ItemName) \
extern const cbindgen_private::ItemVTable ItemName##VTable; \
extern SLINT_DLL_IMPORT const cbindgen_private::ItemVTable* slint_get_##ItemName##VTable();
extern "C" {{
{}
}}
#undef SLINT_DECL_ITEM
}}
"#,
items
.iter()
.map(|item_name| format!("SLINT_DECL_ITEM({item_name});"))
.collect::<Vec<_>>()
.join("\n")
)
}
fn gen_corelib(
root_dir: &Path,
include_dir: &Path,
dependencies: &mut Vec<PathBuf>,
enabled_features: EnabledFeatures,
) -> anyhow::Result<()> {
let mut config = default_config();
let items = [
"Empty",
"Rectangle",
"BasicBorderRectangle",
"BorderRectangle",
"DragArea",
"DropArea",
"ImageItem",
"ClippedImage",
"TouchArea",
"FocusScope",
"SwipeGestureHandler",
"Flickable",
"SimpleText",
"ComplexText",
"Path",
"WindowItem",
"TextInput",
"Clip",
"BoxShadow",
"Rotate",
"Opacity",
"Layer",
"ContextMenu",
"MenuItem",
];
config.export.include = [
"Clipboard",
"ItemTreeVTable",
"Slice",
"WindowAdapterRcOpaque",
"PropertyAnimation",
"AnimationDirection",
"EasingCurve",
"TextHorizontalAlignment",
"TextVerticalAlignment",
"TextOverflow",
"TextWrap",
"ImageFit",
"FillRule",
"MouseCursor",
"InputType",
"StandardButtonKind",
"DialogButtonRole",
"FocusReason",
"PointerEventKind",
"PointerEventButton",
"PointerEvent",
"PointerScrollEvent",
"Rect",
"SortOrder",
"BitmapFont",
"PhysicalRegion",
]
.iter()
.chain(items.iter())
.map(|x| x.to_string())
.collect();
let mut private_exported_types: std::collections::HashSet<String> =
config.export.include.iter().cloned().collect();
// included in generated_public.h
let public_exported_types = [
"RenderingState",
"SetRenderingNotifierError",
"GraphicsAPI",
"CloseRequestResponse",
"StandardListViewItem",
"Rgb8Pixel",
"Rgba8Pixel",
];
config.export.exclude = [
"SharedString",
"SharedVector",
"ImageInner",
"ImageCacheKey",
"Image",
"Color",
"PathData",
"PathElement",
"Brush",
"slint_new_path_elements",
"slint_new_path_events",
"Property",
"Slice",
"Timer",
"PropertyHandleOpaque",
"Callback",
"slint_property_listener_scope_evaluate",
"slint_property_listener_scope_is_dirty",
"PropertyTrackerOpaque",
"CallbackOpaque",
"WindowAdapterRc",
"VoidArg",
"DropEventArg",
"FocusReasonArg",
"KeyEventArg",
"PointerEventArg",
"PointerScrollEventArg",
"PointArg",
"Point",
"MenuEntryModel",
"MenuEntryArg",
"Coord",
"LogicalRect",
"LogicalPoint",
"LogicalPosition",
"LogicalLength",
]
.iter()
.chain(public_exported_types.iter())
.map(|x| x.to_string())
.collect();
let mut crate_dir = root_dir.to_owned();
crate_dir.extend(["internal", "core"].iter());
ensure_cargo_rerun_for_crate(&crate_dir, dependencies)?;
let mut string_config = config.clone();
string_config.export.exclude = vec!["SharedString".into()];
string_config.export.body.insert(
"Slice".to_owned(),
" const T &operator[](int i) const { return ptr[i]; }
/// Note: this doesn't initialize Slice properly, but we need to keep the struct as compatible with C
constexpr Slice() = default;
/// Rust uses a NonNull, so even empty slices shouldn't use nullptr
constexpr Slice(const T *ptr, uintptr_t len) : ptr(ptr ? const_cast<T*>(ptr) : reinterpret_cast<T*>(sizeof(T))), len(len) {}
"
.to_owned(),
);
cbindgen::Builder::new()
.with_config(string_config)
.with_src(crate_dir.join("string.rs"))
.with_src(crate_dir.join("slice.rs"))
.with_after_include("namespace slint { struct SharedString; }")
.generate()
.context("Unable to generate bindings for slint_string_internal.h")?
.write_to_file(include_dir.join("slint_string_internal.h"));
cbindgen::Builder::new()
.with_config(config.clone())
.with_src(crate_dir.join("sharedvector.rs"))
.with_after_include("namespace slint { template<typename T> struct SharedVector; }")
.generate()
.context("Unable to generate bindings for slint_sharedvector_internal.h")?
.write_to_file(include_dir.join("slint_sharedvector_internal.h"));
let mut properties_config = config.clone();
properties_config.export.exclude.clear();
properties_config.structure.derive_eq = true;
properties_config.structure.derive_neq = true;
private_exported_types.extend(properties_config.export.include.iter().cloned());
cbindgen::Builder::new()
.with_config(properties_config)
.with_src(crate_dir.join("properties.rs"))
.with_src(crate_dir.join("properties/ffi.rs"))
.with_src(crate_dir.join("callbacks.rs"))
.with_after_include("namespace slint { class Color; class Brush; }")
.generate()
.context("Unable to generate bindings for slint_properties_internal.h")?
.write_to_file(include_dir.join("slint_properties_internal.h"));
// slint_timer_internal.h:
let timer_config = {
let mut tmp = config.clone();
tmp.export.include = [
"TimerMode",
"slint_timer_start",
"slint_timer_singleshot",
"slint_timer_destroy",
"slint_timer_stop",
"slint_timer_restart",
"slint_timer_running",
]
.iter()
.map(|s| s.to_string())
.collect();
tmp
};
config.export.exclude.extend(timer_config.export.include.iter().cloned());
cbindgen::Builder::new()
.with_config(timer_config)
.with_src(crate_dir.join("timers.rs"))
.generate()
.context("Unable to generate bindings for slint_timer_internal.h")?
.write_to_file(include_dir.join("slint_timer_internal.h"));
for (rust_types, internal_header, prelude) in [
(
vec![
"ImageInner",
"Image",
"ImageCacheKey",
"Size",
"slint_image_size",
"slint_image_path",
"slint_image_load_from_path",
"slint_image_load_from_embedded_data",
"slint_image_from_embedded_textures",
"slint_image_compare_equal",
"slint_image_set_nine_slice_edges",
"slint_image_to_rgb8",
"slint_image_to_rgba8",
"slint_image_to_rgba8_premultiplied",
"SharedPixelBuffer",
"SharedImageBuffer",
"StaticTextures",
"BorrowedOpenGLTextureOrigin"
],
"slint_image_internal.h",
"#include \"slint_color.h\"\nnamespace slint::cbindgen_private { struct ParsedSVG{}; struct HTMLImage{}; using namespace vtable; namespace types{ struct NineSliceImage{}; } }",
),
(
vec!["Color", "slint_color_brighter", "slint_color_darker",
"slint_color_transparentize",
"slint_color_mix",
"slint_color_with_alpha",
"slint_color_to_hsva",
"slint_color_from_hsva",],
"slint_color_internal.h",
"",
),
(
vec!["PathData", "PathElement", "slint_new_path_elements", "slint_new_path_events", "Point"],
"slint_pathdata_internal.h",
"#include \"slint_sharedvector.h\"\n#include \"slint_point.h\"",
),
(
vec!["Brush", "LinearGradient", "GradientStop", "RadialGradient"],
"slint_brush_internal.h",
"",
),
(
vec!["MouseEvent"],
"slint_events_internal.h",
"#include \"slint_point.h\"
namespace slint::cbindgen_private {
struct KeyEvent; struct PointerEvent;
struct Rect;
using LogicalRect = Rect;
using LogicalPoint = Point2D<float>;
using LogicalLength = float;
}",
)
]
.iter()
{
let mut special_config = config.clone();
special_config.export.include = rust_types.iter().map(|s| s.to_string()).collect();
special_config.export.exclude = [
"slint_visit_item_tree",
"slint_windowrc_drop",
"slint_windowrc_clone",
"slint_windowrc_show",
"slint_windowrc_hide",
"slint_windowrc_is_visible",
"slint_windowrc_get_scale_factor",
"slint_windowrc_set_scale_factor",
"slint_windowrc_get_text_input_focused",
"slint_windowrc_set_text_input_focused",
"slint_windowrc_set_focus_item",
"slint_windowrc_set_component",
"slint_windowrc_show_popup",
"slint_windowrc_close_popup",
"slint_windowrc_set_rendering_notifier",
"slint_windowrc_request_redraw",
"slint_windowrc_on_close_requested",
"slint_windowrc_position",
"slint_windowrc_set_logical_position",
"slint_windowrc_set_physical_position",
"slint_windowrc_size",
"slint_windowrc_set_logical_size",
"slint_windowrc_set_physical_size",
"slint_windowrc_color_scheme",
"slint_windowrc_supports_native_menu_bar",
"slint_windowrc_setup_native_menu_bar",
"slint_windowrc_default_font_size",
"slint_windowrc_dispatch_pointer_event",
"slint_windowrc_dispatch_key_event",
"slint_windowrc_dispatch_event",
"slint_windowrc_set_fullscreen",
"slint_windowrc_set_minimized",
"slint_windowrc_set_maximized",
"slint_windowrc_is_fullscreen",
"slint_windowrc_is_minimized",
"slint_windowrc_is_maximized",
"slint_windowrc_take_snapshot",
]
.into_iter()
.chain(config.export.exclude.iter().map(|s| s.as_str()))
.filter(|exclusion| !rust_types.iter().any(|inclusion| inclusion == exclusion))
.map(|s| s.to_string())
.collect();
config.export.exclude.extend(rust_types.iter().map(|s| s.to_string()));
special_config.enumeration = cbindgen::EnumConfig {
derive_tagged_enum_copy_assignment: true,
derive_tagged_enum_copy_constructor: true,
derive_tagged_enum_destructor: true,
derive_helper_methods: true,
private_default_tagged_enum_constructor: true,
..Default::default()
};
special_config.structure.derive_eq = true;
special_config.structure.derive_neq = true;
// Put the rust type in a deeper "types" namespace, so the use of same type in for example generated
// Property<> fields uses the public `slint::Blah` type
special_config.namespaces =
Some(vec!["slint".into(), "cbindgen_private".into(), "types".into()]);
private_exported_types.extend(special_config.export.include.iter().cloned());
special_config.after_includes = (!prelude.is_empty()).then(|| prelude.to_string());
cbindgen::Builder::new()
.with_config(special_config)
.with_src(crate_dir.join("graphics.rs"))
.with_src(crate_dir.join("graphics/color.rs"))
.with_src(crate_dir.join("graphics/path.rs"))
.with_src(crate_dir.join("graphics/brush.rs"))
.with_src(crate_dir.join("graphics/image.rs"))
.with_src(crate_dir.join("graphics/image/cache.rs"))
.with_src(crate_dir.join("animations.rs"))
.with_src(crate_dir.join("input.rs"))
.with_src(crate_dir.join("item_rendering.rs"))
.with_src(crate_dir.join("window.rs"))
.with_include("slint_enums_internal.h")
.generate()
.with_context(|| format!("Unable to generate bindings for {internal_header}"))?
.write_to_file(include_dir.join(internal_header));
}
// Generate a header file with some public API (enums, etc.)
let mut public_config = config.clone();
public_config.namespaces = Some(vec!["slint".into()]);
public_config.export.item_types = vec![cbindgen::ItemType::Enums, cbindgen::ItemType::Structs];
// Previously included types are now excluded (to avoid duplicates)
public_config.export.exclude = private_exported_types.into_iter().collect();
public_config.export.exclude.push("LogicalPosition".into());
public_config.export.exclude.push("MenuVTable".into());
public_config.export.include = public_exported_types.into_iter().map(str::to_string).collect();
public_config.export.body.insert(
"Rgb8Pixel".to_owned(),
"/// \\private\nfriend bool operator==(const Rgb8Pixel&, const Rgb8Pixel&) = default;"
.into(),
);
public_config.export.body.insert(
"Rgba8Pixel".to_owned(),
"/// \\private\nfriend bool operator==(const Rgba8Pixel&, const Rgba8Pixel&) = default;"
.into(),
);
cbindgen::Builder::new()
.with_config(public_config)
.with_src(crate_dir.join("graphics.rs"))
.with_src(crate_dir.join("window.rs"))
.with_src(crate_dir.join("api.rs"))
.with_src(crate_dir.join("model.rs"))
.with_src(crate_dir.join("graphics/image.rs"))
.with_include("slint_string.h")
.with_after_include(format!(
r#"
/// This macro expands to the to the numeric value of the major version of Slint you're
/// developing against. For example if you're using version 1.5.2, this macro will expand to 1.
#define SLINT_VERSION_MAJOR {x}
/// This macro expands to the to the numeric value of the minor version of Slint you're
/// developing against. For example if you're using version 1.5.2, this macro will expand to 5.
#define SLINT_VERSION_MINOR {y}
/// This macro expands to the to the numeric value of the patch version of Slint you're
/// developing against. For example if you're using version 1.5.2, this macro will expand to 2.
#define SLINT_VERSION_PATCH {z}
/// This macro expands to the string representation of the version of Slint you're developing against.
/// For example if you're using version 1.5.2, this macro will expand to "1.5.2".
#define SLINT_VERSION_STRING "{x}.{y}.{z}"
{features}
"#,
x = env!("CARGO_PKG_VERSION_MAJOR"),
y = env!("CARGO_PKG_VERSION_MINOR"),
z = env!("CARGO_PKG_VERSION_PATCH"),
features = enabled_features.defines()
))
.generate()
.context("Unable to generate bindings for slint_generated_public.h")?
.write_to_file(include_dir.join("slint_generated_public.h"));
config.export.body.insert(
"ItemTreeNode".to_owned(),
" constexpr ItemTreeNode(Item_Body x) : item {x} {}
constexpr ItemTreeNode(DynamicTree_Body x) : dynamic_tree{x} {}"
.to_owned(),
);
config.export.body.insert(
"CachedRenderingData".to_owned(),
" constexpr CachedRenderingData() : cache_index{}, cache_generation{} {}".to_owned(),
);
config.export.body.insert(
"EasingCurve".to_owned(),
" constexpr EasingCurve(EasingCurve::Tag tag = Tag::Linear, float a = 0, float b = 0, float c = 1, float d = 1) : tag(tag), cubic_bezier{{a,b,c,d}} {}".into()
);
config.export.body.insert(
"LayoutInfo".to_owned(),
" inline LayoutInfo merge(const LayoutInfo &other) const;
friend inline LayoutInfo operator+(const LayoutInfo &a, const LayoutInfo &b) { return a.merge(b); }
friend bool operator==(const LayoutInfo&, const LayoutInfo&) = default;".into(),
);
config.export.body.insert(
"WindowEvent".to_owned(),
"/* Some members of the WindowEvent enum have destructors (with SharedString), but thankfully we don't use these so we can have an empty constructor */
~WindowEvent() {}"
.into(),
);
config
.export
.body
.insert("Flickable".to_owned(), " inline Flickable(); inline ~Flickable();".into());
config.export.pre_body.insert("FlickableDataBox".to_owned(), "struct FlickableData;".into());
cbindgen::Builder::new()
.with_config(config)
.with_src(crate_dir.join("lib.rs"))
.with_include("slint_config.h")
.with_include("vtable.h")
.with_include("slint_string.h")
.with_include("slint_sharedvector.h")
.with_include("slint_properties.h")
.with_include("slint_callbacks.h")
.with_include("slint_color.h")
.with_include("slint_image.h")
.with_include("slint_pathdata.h")
.with_include("slint_brush.h")
.with_include("slint_generated_public.h")
.with_include("slint_enums_internal.h")
.with_include("slint_point.h")
.with_include("slint_timer.h")
.with_include("slint_builtin_structs_internal.h")
.with_include("slint_events_internal.h")
.with_after_include(
r"
namespace slint {
namespace private_api { class WindowAdapterRc; }
namespace cbindgen_private {
using slint::private_api::WindowAdapterRc;
using namespace vtable;
using private_api::Property;
using private_api::PathData;
using private_api::Point;
struct ItemTreeVTable;
struct ItemVTable;
using types::IntRect;
using types::Size;
using types::MouseEvent;
}
template<typename ModelData> class Model;
}",
)
.with_trailer(gen_item_declarations(&items))
.generate()
.expect("Unable to generate bindings")
.write_to_file(include_dir.join("slint_internal.h"));
Ok(())
}
fn gen_backend_qt(
root_dir: &Path,
include_dir: &Path,
dependencies: &mut Vec<PathBuf>,
) -> anyhow::Result<()> {
let mut config = default_config();
let items = [
"NativeButton",
"NativeSpinBox",
"NativeCheckBox",
"NativeSlider",
"NativeProgressIndicator",
"NativeGroupBox",
"NativeLineEdit",
"NativeScrollView",
"NativeStandardListViewItem",
"NativeTableHeaderSection",
"NativeComboBox",
"NativeComboBoxPopup",
"NativeTabWidget",
"NativeTab",
"NativeStyleMetrics",
"NativePalette",
];
config.export.include = items.iter().map(|x| x.to_string()).collect();
config.export.exclude = vec!["FloatArg".into(), "IntArg".into()];
config.export.body.insert(
"NativeStyleMetrics".to_owned(),
" inline explicit NativeStyleMetrics(void* = nullptr); inline ~NativeStyleMetrics();"
.to_owned(),
);
config.export.body.insert(
"NativePalette".to_owned(),
" inline explicit NativePalette(void* = nullptr); inline ~NativePalette();".to_owned(),
);
let mut crate_dir = root_dir.to_owned();
crate_dir.extend(["internal", "backends", "qt"].iter());
ensure_cargo_rerun_for_crate(&crate_dir, dependencies)?;
cbindgen::Builder::new()
.with_config(config)
.with_crate(crate_dir)
.with_include("slint_internal.h")
.with_after_include(
r"
namespace slint::cbindgen_private {
// HACK ALERT: This struct declaration is duplicated in internal/backend/qt/qt_widgets.rs - keep in sync.
struct SlintTypeErasedWidget
{
virtual ~SlintTypeErasedWidget() = 0;
SlintTypeErasedWidget(const SlintTypeErasedWidget&) = delete;
SlintTypeErasedWidget& operator=(const SlintTypeErasedWidget&) = delete;
virtual void *qwidget() const = 0;
};
using SlintTypeErasedWidgetPtr = std::unique_ptr<SlintTypeErasedWidget>;
}
",
)
.with_trailer(gen_item_declarations(&items))
.generate()
.context("Unable to generate bindings for slint_qt_internal.h")?
.write_to_file(include_dir.join("slint_qt_internal.h"));
Ok(())
}
fn gen_testing(
root_dir: &Path,
include_dir: &Path,
dependencies: &mut Vec<PathBuf>,
) -> anyhow::Result<()> {
let config = default_config();
let mut crate_dir = root_dir.to_owned();
crate_dir.extend(["internal", "backends", "testing"].iter());
ensure_cargo_rerun_for_crate(&crate_dir, dependencies)?;
cbindgen::Builder::new()
.with_config(config)
.with_crate(crate_dir)
.with_include("slint_testing_internal.h")
.generate()
.context("Unable to generate bindings for slint_testing_internal.h")?
.write_to_file(include_dir.join("slint_testing_internal.h"));
Ok(())
}
fn gen_platform(
root_dir: &Path,
include_dir: &Path,
dependencies: &mut Vec<PathBuf>,
) -> anyhow::Result<()> {
let config = default_config();
let mut crate_dir = root_dir.to_owned();
crate_dir.extend(["api", "cpp"].iter());
ensure_cargo_rerun_for_crate(&crate_dir, dependencies)?;
cbindgen::Builder::new()
.with_config(config)
.with_crate(crate_dir)
.with_include("slint_image_internal.h")
.with_include("slint_internal.h")
.with_after_include(
r"
namespace slint::platform { struct Rgb565Pixel; }
namespace slint::cbindgen_private {
struct WindowProperties; using slint::platform::Rgb565Pixel;
using slint::cbindgen_private::types::TexturePixelFormat;
struct DrawTextureArgs;
struct DrawRectangleArgs;
}
",
)
.generate()
.context("Unable to generate bindings for slint_platform_internal.h")?
.write_to_file(include_dir.join("slint_platform_internal.h"));
Ok(())
}
fn gen_interpreter(
root_dir: &Path,
include_dir: &Path,
dependencies: &mut Vec<PathBuf>,
) -> anyhow::Result<()> {
let mut config = default_config();
config.export.exclude = IntoIterator::into_iter([
"Value",
"ValueType",
"PropertyDescriptor",
"Diagnostic",
"PropertyDescriptor",
"Box",
])
.map(String::from)
.collect();
let mut crate_dir = root_dir.to_owned();
crate_dir.extend(["internal", "interpreter"].iter());
ensure_cargo_rerun_for_crate(&crate_dir, dependencies)?;
// Generate a header file with some public API (enums, etc.)
let mut public_config = config.clone();
public_config.namespaces = Some(vec!["slint".into(), "interpreter".into()]);
public_config.export.item_types = vec![cbindgen::ItemType::Enums, cbindgen::ItemType::Structs];
public_config.export.exclude = IntoIterator::into_iter([
"ComponentCompilerOpaque",
"ComponentDefinitionOpaque",
"ModelAdaptorVTable",
"StructIteratorOpaque",
"ComponentInstance",
"StructIteratorResult",
"Value",
"StructOpaque",
"ModelNotifyOpaque",
])
.map(String::from)
.collect();
cbindgen::Builder::new()
.with_config(public_config)
.with_crate(crate_dir.clone())
.generate()
.context("Unable to generate bindings for slint_interpreter_generated_public.h")?
.write_to_file(include_dir.join("slint_interpreter_generated_public.h"));
cbindgen::Builder::new()
.with_config(config)
.with_crate(crate_dir)
.with_include("slint_internal.h")
.with_include("slint_interpreter_generated_public.h")
.with_after_include(
r"
namespace slint::cbindgen_private {
struct Value;
using slint::interpreter::ValueType;
using slint::interpreter::PropertyDescriptor;
using slint::interpreter::Diagnostic;
template <typename T> using Box = T*;
}",
)
.generate()
.context("Unable to generate bindings for slint_interpreter_internal.h")?
.write_to_file(include_dir.join("slint_interpreter_internal.h"));
Ok(())
}
macro_rules! declare_features {
($($f:ident)+) => {
#[derive(Clone, Copy)]
pub struct EnabledFeatures {
$(pub $f: bool,)*
}
impl EnabledFeatures {
/// Generate the `#define`
pub fn defines(self) -> String {
let mut defines = String::new();
$(
if self.$f {
defines = format!("{defines}///This macro is defined when Slint was configured with the SLINT_FEATURE_{0} flag enabled\n#define SLINT_FEATURE_{0}\n", stringify!($f).to_ascii_uppercase());
};
)*
defines
}
/// Get the feature from the environment variable set by cargo when building running the slint-cpp's build script
#[allow(unused)]
pub fn from_env() -> Self {
Self {
$(
$f: std::env::var(format!("CARGO_FEATURE_{}", stringify!($f).to_ascii_uppercase())).is_ok(),
)*
}
}
}
};
}
declare_features! {
interpreter
testing
backend_qt
backend_winit
backend_winit_x11
backend_winit_wayland
backend_linuxkms
backend_linuxkms_noseat
renderer_femtovg
renderer_skia
renderer_skia_opengl
renderer_skia_vulkan
renderer_software
gettext
accessibility
system_testing
freestanding
experimental
}
/// Generate the headers.
/// `root_dir` is the root directory of the slint git repo
/// `include_dir` is the output directory
/// Returns the list of all paths that contain dependencies to the generated output. If you call this
/// function from build.rs, feed each entry to stdout prefixed with `cargo:rerun-if-changed=`.
pub fn gen_all(
root_dir: &Path,
include_dir: &Path,
enabled_features: EnabledFeatures,
) -> anyhow::Result<Vec<PathBuf>> {
proc_macro2::fallback::force(); // avoid a abort if panic=abort is set
std::fs::create_dir_all(include_dir).context("Could not create the include directory")?;
let mut deps = Vec::new();
enums(include_dir)?;
builtin_structs(include_dir)?;
gen_corelib(root_dir, include_dir, &mut deps, enabled_features)?;
gen_backend_qt(root_dir, include_dir, &mut deps)?;
gen_platform(root_dir, include_dir, &mut deps)?;
if enabled_features.testing {
gen_testing(root_dir, include_dir, &mut deps)?;
}
if enabled_features.interpreter {
gen_interpreter(root_dir, include_dir, &mut deps)?;
}
Ok(deps)
}