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---
Language: Cpp
BasedOnStyle: LLVM
AccessModifierOffset: -2
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AlignConsecutiveMacros: true
AlignConsecutiveAssignments: true
AlignEscapedNewlines: Right
AlignOperands: false
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AllowShortFunctionsOnASingleLine: Empty
AllowShortIfStatementsOnASingleLine: Never
AllowShortLambdasOnASingleLine: All
AllowShortLoopsOnASingleLine: false
AlwaysBreakAfterDefinitionReturnType: None
AlwaysBreakAfterReturnType: None
AlwaysBreakBeforeMultilineStrings: false
AlwaysBreakTemplateDeclarations: Yes
BreakBeforeBraces: Attach
BreakBeforeTernaryOperators: false
BreakConstructorInitializers: AfterColon
ColumnLimit: 180
CompactNamespaces: false
ConstructorInitializerAllOnOneLineOrOnePerLine: false
ExperimentalAutoDetectBinPacking: false
FixNamespaceComments: false
IncludeBlocks: Preserve
IndentCaseLabels: true
IndentWidth: 4
PointerAlignment: Left
ReflowComments: false
SortIncludes: false
SortUsingDeclarations: false
SpaceAfterCStyleCast: false
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SpacesBeforeTrailingComments: 1
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Standard: Auto
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AlignConsecutiveDeclarations: AcrossEmptyLines
NamespaceIndentation: All

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CMakeLists.txt.user
CMakeCache.txt
CMakeFiles
CMakeScripts
Testing
cmake_install.cmake
install_manifest.txt
compile_commands.json
CTestTestfile.cmake
_deps
build/
result*
/.vscode/
/.idea/
.envrc
.cache
*.o
*-protocol.c
*-protocol.h
.ccls-cache
*.so
hyprctl/hyprctl
gmon.out
*.out
*.tar.gz
PKGBUILD
src/version.h
.direnv

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cmake_minimum_required(VERSION 3.19)
set(VERSION 0.1.0)
project(hyprwayland-scanner
DESCRIPTION "A hyprland version of wayland-scanner in and for C++"
VERSION ${VERSION}
)
set(CMAKE_MESSAGE_LOG_LEVEL "STATUS")
if(CMAKE_BUILD_TYPE MATCHES Debug OR CMAKE_BUILD_TYPE MATCHES DEBUG)
message(STATUS "Configuring hyprwayland-scanner in Debug with CMake")
add_compile_definitions(HYPRLAND_DEBUG)
else()
add_compile_options(-O3)
message(STATUS "Configuring hyprwayland-scanner in Release with CMake")
endif()
# configure
set(CMAKE_CXX_STANDARD 23)
add_compile_options(-Wall -Wextra -Wno-unused-parameter -Wno-unused-value
-Wno-missing-field-initializers -Wno-narrowing)
add_compile_definitions(SCANNER_VERSION="${VERSION}")
# dependencies
message(STATUS "Checking deps...")
find_package(Threads REQUIRED)
find_package(PkgConfig REQUIRED)
pkg_check_modules(deps REQUIRED IMPORTED_TARGET pugixml)
file(GLOB_RECURSE SRCFILES CONFIGURE_DEPENDS "src/*.cpp")
add_executable(hyprwayland-scanner ${SRCFILES})
target_link_libraries(hyprwayland-scanner PRIVATE rt Threads::Threads PkgConfig::deps)
# Installation
install(TARGETS hyprwayland-scanner)

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BSD 3-Clause License
Copyright (c) 2024, Hypr Development
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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README.md
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# hyprwayland-scanner
A Hyprland implementation of wayland-scanner, in and for C++.
## Usage
```sh
hyprwayland-scanner '/path/to/proto' '/path/to/output/directory'
```
## Building
```sh
cmake -B build
cmake --build build -j`nproc`
```
### Installation
```sh
sudo cmake --install build
```

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#include <pugixml.hpp>
#include <iostream>
#include <string>
#include <fstream>
#include <format>
#include <vector>
#include <algorithm>
struct SRequestArgument {
std::string CType;
std::string wlType;
std::string interface;
std::string name;
};
struct SRequest {
std::vector<SRequestArgument> args;
std::string name;
};
struct SEvent {
std::vector<SRequestArgument> args;
std::string name;
};
struct SInterface {
std::vector<SRequest> requests;
std::vector<SEvent> events;
std::string name;
int version = 1;
};
struct {
std::vector<SInterface> ifaces;
} XMLDATA;
std::string argsToShort(std::vector<SRequestArgument>& args) {
std::string shortt = "";
for (auto& a : args) {
if (a.wlType == "int")
shortt += "i";
else if (a.wlType == "new_id") {
if (a.interface.empty())
shortt += "su";
shortt += "n";
} else if (a.wlType == "uint")
shortt += "u";
else if (a.wlType == "fixed")
shortt += "f";
else if (a.wlType == "string")
shortt += "s";
else if (a.wlType == "object")
shortt += "o";
else if (a.wlType == "array")
shortt += "a";
else if (a.wlType == "fd")
shortt += "h";
else
throw std::runtime_error("Unknown arg in argsToShort");
}
return shortt;
}
std::string WPTypeToCType(const std::string& wptype) {
if (wptype == "uint" || wptype == "new_id")
return "uint32_t";
if (wptype == "object")
return "wl_resource*";
if (wptype == "int" || wptype == "fd")
return "int32_t";
if (wptype == "fixed")
return "wl_fixed_t";
if (wptype == "array")
return "wl_array*";
if (wptype == "string")
return "const char*";
throw std::runtime_error("unknown wp type");
return "";
}
std::string HEADER;
std::string SOURCE;
std::string camelize(std::string snake) {
std::string result = "";
for (size_t i = 0; i < snake.length(); ++i) {
if (snake[i] == '_' && i != 0 && i + 1 < snake.length() && snake[i + 1] != '_') {
result += ::toupper(snake[i + 1]);
i++;
continue;
}
result += snake[i];
}
return result;
}
struct {
std::string name;
std::string nameOriginal;
} PROTO_DATA;
void parseXML(pugi::xml_document& doc) {
for (auto& iface : doc.child("protocol").children("interface")) {
SInterface ifc;
ifc.name = iface.attribute("name").as_string();
ifc.version = iface.attribute("version").as_int();
for (auto& rq : iface.children("request")) {
SRequest srq;
srq.name = rq.attribute("name").as_string();
for (auto& arg : rq.children("arg")) {
SRequestArgument sargm;
sargm.name = arg.attribute("name").as_string();
sargm.CType = WPTypeToCType(arg.attribute("type").as_string());
sargm.wlType = arg.attribute("type").as_string();
sargm.interface = arg.attribute("interface").as_string();
srq.args.push_back(sargm);
}
ifc.requests.push_back(srq);
}
for (auto& ev : iface.children("event")) {
SEvent sev;
sev.name = ev.attribute("name").as_string();
for (auto& arg : ev.children("arg")) {
SRequestArgument sargm;
sargm.name = arg.attribute("name").as_string();
sargm.CType = WPTypeToCType(arg.attribute("type").as_string());
sargm.interface = arg.attribute("interface").as_string();
sargm.wlType = arg.attribute("type").as_string();
sev.args.push_back(sargm);
}
ifc.events.push_back(sev);
}
XMLDATA.ifaces.push_back(ifc);
}
}
void parseHeader() {
// add some boilerplate
HEADER += R"#(#pragma once
#include <functional>
#include <cstdint>
#include <wayland-server.h>
#define F std::function
struct wl_client;
struct wl_resource;
)#";
for (auto& iface : XMLDATA.ifaces) {
const auto IFACE_NAME_CAMEL = camelize(iface.name);
const auto IFACE_CLASS_NAME_CAMEL = camelize("C_" + iface.name);
// begin the class
HEADER += std::format(R"#(
class {} {{
public:
{}(wl_client* client, uint32_t version, uint32_t id);
~{}();
// set a listener for when this resource is _being_ destroyed
void setOnDestroy(F<void({}*)> handler) {{
onDestroy = handler;
}}
// set the data for this resource
void setData(void* data) {{
pData = data;
}}
// get the data for this resource
void* data() {{
return pData;
}}
// get the raw wl_resource ptr
wl_resource* resource() {{
return pResource;
}}
)#",
IFACE_CLASS_NAME_CAMEL, IFACE_CLASS_NAME_CAMEL, IFACE_CLASS_NAME_CAMEL, IFACE_CLASS_NAME_CAMEL);
// add all setters for requests
HEADER += "\n // --------------- Requests --------------- //\n\n";
for (auto& rq : iface.requests) {
std::string args = ", ";
for (auto& arg : rq.args) {
args += arg.CType + ", ";
}
args.pop_back();
args.pop_back();
HEADER += std::format(" void {}(F<void(wl_client*, wl_resource*{})> handler);\n", camelize("set_" + rq.name), args);
}
// start events
HEADER += "\n // --------------- Events --------------- //\n\n";
for (auto& ev : iface.events) {
std::string args = "";
for (auto& arg : ev.args) {
args += arg.CType + ", ";
}
if (!args.empty()) {
args.pop_back();
args.pop_back();
}
HEADER += std::format(" void {}({});\n", camelize("send_" + ev.name), args);
}
// end events
// start private section
HEADER += "\n private:\n";
// start requests storage
HEADER += " struct {\n";
for (auto& rq : iface.requests) {
std::string args = ", ";
for (auto& arg : rq.args) {
args += arg.CType + ", ";
}
args.pop_back();
args.pop_back();
HEADER += std::format(" F<void(wl_client*, wl_resource*{})> {};\n", args, camelize(rq.name));
}
// end requests storage
HEADER += " } requests;\n";
// constant resource stuff
HEADER += std::format(R"#(
void onDestroyCalled();
F<void({}*)> onDestroy;
wl_resource* pResource = nullptr;
wl_listener resourceDestroyListener;
void* pData = nullptr;)#",
IFACE_CLASS_NAME_CAMEL);
HEADER += "\n};\n\n";
}
HEADER += "\n\n#undef F\n";
}
void parseSource() {
SOURCE += std::format(R"#(#define private public
#include "{}.hpp"
#undef private
)#",
PROTO_DATA.name);
// reference interfaces
// dummy
SOURCE += R"#(
static const wl_interface* dummyTypes[] = { nullptr };
)#";
SOURCE += R"#(
// Reference all other interfaces.
// The reason why this is in snake is to
// be able to cooperate with existing
// wayland_scanner interfaces (they are interop)
)#";
std::vector<std::string> declaredIfaces;
for (auto& iface : XMLDATA.ifaces) {
const auto IFACE_WL_NAME = iface.name + "_interface";
const auto IFACE_WL_NAME_CAMEL = camelize(iface.name + "_interface");
if (std::find(declaredIfaces.begin(), declaredIfaces.end(), IFACE_WL_NAME) == declaredIfaces.end()) {
SOURCE += std::format("extern const wl_interface {};\n#define {} {}\n", IFACE_WL_NAME, IFACE_WL_NAME_CAMEL, IFACE_WL_NAME);
declaredIfaces.push_back(IFACE_WL_NAME);
}
// do all referenced too
for (auto& rq : iface.requests) {
for (auto& arg : rq.args) {
if (arg.interface.empty())
continue;
const auto IFACE_WL_NAME2 = arg.interface + "_interface";
const auto IFACE_WL_NAME_CAMEL2 = camelize(arg.interface + "_interface");
if (std::find(declaredIfaces.begin(), declaredIfaces.end(), IFACE_WL_NAME2) == declaredIfaces.end()) {
SOURCE += std::format("extern const wl_interface {};\n#define {} {}\n", IFACE_WL_NAME2, IFACE_WL_NAME_CAMEL2, IFACE_WL_NAME2);
declaredIfaces.push_back(IFACE_WL_NAME2);
}
}
}
for (auto& ev : iface.events) {
for (auto& arg : ev.args) {
if (arg.interface.empty())
continue;
const auto IFACE_WL_NAME2 = arg.interface + "_interface";
const auto IFACE_WL_NAME_CAMEL2 = camelize(arg.interface + "_interface");
if (std::find(declaredIfaces.begin(), declaredIfaces.end(), IFACE_WL_NAME2) == declaredIfaces.end()) {
SOURCE += std::format("extern const wl_interface {};\n#define {} {}\n", IFACE_WL_NAME2, IFACE_WL_NAME_CAMEL2, IFACE_WL_NAME2);
declaredIfaces.push_back(IFACE_WL_NAME2);
}
}
}
}
// declare ifaces
for (auto& iface : XMLDATA.ifaces) {
const auto IFACE_NAME = iface.name;
const auto IFACE_NAME_CAMEL = camelize(iface.name);
const auto IFACE_CLASS_NAME_CAMEL = camelize("C_" + iface.name);
// create handlers
for (auto& rq : iface.requests) {
const auto REQUEST_NAME = camelize(std::string{"_"} + "C_" + IFACE_NAME + "_" + rq.name);
std::string argsC = ", ";
for (auto& arg : rq.args) {
argsC += arg.CType + " " + arg.name + ", ";
}
argsC.pop_back();
argsC.pop_back();
std::string argsN = ", ";
for (auto& arg : rq.args) {
argsN += arg.name + ", ";
}
argsN.pop_back();
argsN.pop_back();
SOURCE += std::format(R"#(
static void {}(wl_client* client, wl_resource* resource{}) {{
const auto PO = ({}*)wl_resource_get_user_data(resource);
if (PO->requests.{})
PO->requests.{}(client, resource{});
}}
)#",
REQUEST_NAME, argsC, IFACE_CLASS_NAME_CAMEL, camelize(rq.name), camelize(rq.name), argsN);
}
// destroy handler
SOURCE += std::format(R"#(
static void _{}__DestroyListener(wl_listener* l, void* d) {{
{}* pResource = wl_container_of(l, pResource, resourceDestroyListener);
pResource->onDestroyCalled();
}}
)#",
IFACE_CLASS_NAME_CAMEL, IFACE_CLASS_NAME_CAMEL);
// create vtable
const auto IFACE_VTABLE_NAME = "_" + IFACE_CLASS_NAME_CAMEL + "VTable";
SOURCE += std::format(R"#(
static const void* {}[] = {{
)#",
IFACE_VTABLE_NAME);
for (auto& rq : iface.requests) {
const auto REQUEST_NAME = camelize(std::string{"_"} + "C_" + IFACE_NAME + "_" + rq.name);
SOURCE += std::format(" {},\n", REQUEST_NAME);
}
SOURCE += "};\n";
// create events
int evid = 0;
for (auto& ev : iface.events) {
const auto EVENT_NAME = camelize("send_" + ev.name);
std::string argsC = ", ";
for (auto& arg : ev.args) {
argsC += arg.CType + " " + arg.name + ", ";
}
argsC.pop_back();
argsC.pop_back();
std::string argsN = ", ";
for (auto& arg : ev.args) {
argsN += arg.name + ", ";
}
argsN.pop_back();
argsN.pop_back();
SOURCE += std::format(R"#(
void {}::{}({}) {{
wl_resource_post_event(pResource, {}{});
}}
)#",
IFACE_CLASS_NAME_CAMEL, EVENT_NAME, argsC, evid, argsN);
evid++;
}
// wayland interfaces and stuff
// type tables
for (auto& rq : iface.requests) {
if (rq.args.empty())
continue;
const auto TYPE_TABLE_NAME = camelize(std::string{"_"} + "C_" + IFACE_NAME + "_" + rq.name + "_types");
SOURCE += std::format("static const wl_interface* {}[] = {{\n", TYPE_TABLE_NAME);
for (auto& arg : rq.args) {
if (arg.interface.empty()) {
SOURCE += " nullptr,\n";
continue;
}
SOURCE += std::format(" &{}_interface,\n", arg.interface);
}
SOURCE += "};\n";
}
const auto MESSAGE_NAME = camelize(std::string{"_"} + "C_" + IFACE_NAME + "_message");
// message
SOURCE += std::format(R"#(
static const wl_message {}[] = {{
)#",
MESSAGE_NAME);
for (auto& rq : iface.requests) {
// create type table
const auto TYPE_TABLE_NAME = camelize(std::string{"_"} + "C_" + IFACE_NAME + "_" + rq.name + "_types");
SOURCE += std::format(" {{ \"{}\", \"{}\", {}}},\n", rq.name, argsToShort(rq.args), rq.args.empty() ? "dummyTypes + 0" : TYPE_TABLE_NAME + " + 0");
}
SOURCE += "};\n";
// protocol body
SOURCE += std::format(R"#(
{}::{}(wl_client* client, uint32_t version, uint32_t id) {{
pResource = wl_resource_create(client, &{}, version, id);
if (!pResource)
return;
wl_resource_set_user_data(pResource, this);
wl_list_init(&resourceDestroyListener.link);
resourceDestroyListener.notify = _{}__DestroyListener;
wl_resource_add_destroy_listener(pResource, &resourceDestroyListener);
wl_resource_set_implementation(pResource, {}, this, nullptr);
}}
{}::~{}() {{
wl_list_remove(&resourceDestroyListener.link);
wl_list_init(&resourceDestroyListener.link);
// if we still own the wayland resource,
// it means we need to destroy it.
if (wl_resource_get_user_data(pResource) == this)
wl_resource_destroy(pResource);
}}
void {}::onDestroyCalled() {{
wl_resource_set_user_data(pResource, nullptr);
if (onDestroy)
onDestroy(this);
}}
)#",
IFACE_CLASS_NAME_CAMEL, IFACE_CLASS_NAME_CAMEL, IFACE_NAME + "_interface", IFACE_CLASS_NAME_CAMEL, IFACE_VTABLE_NAME, IFACE_CLASS_NAME_CAMEL,
IFACE_CLASS_NAME_CAMEL, IFACE_CLASS_NAME_CAMEL);
}
}
int main(int argc, char** argv, char** envp) {
std::string outpath = "";
std::string protopath = "";
for (int i = 1; i < argc; ++i) {
std::string curarg = argv[i];
if (i == 1)
protopath = curarg;
else if (i == 2)
outpath = curarg;
}
if (outpath.empty() || protopath.empty()) {
std::cerr << "Not enough args\n";
return 1;
}
// build!
pugi::xml_document doc;
if (!doc.load_file(protopath.c_str())) {
std::cerr << "Couldn't load proto\n";
return 1;
}
PROTO_DATA.nameOriginal = doc.child("protocol").attribute("name").as_string();
PROTO_DATA.name = camelize(PROTO_DATA.nameOriginal);
const auto COPYRIGHT =
std::format("// Generated with hyprwayland-scanner {}. Made with vaxry's keyboard and ❤️.\n// {}\n\n/*\n This protocol's authors' copyright notice is:\n\n{}\n*/\n\n", SCANNER_VERSION,
PROTO_DATA.nameOriginal, std::string{doc.child("protocol").child("copyright").child_value()});
parseXML(doc);
parseHeader();
parseSource();
std::ofstream header(outpath + "/" + PROTO_DATA.name + ".hpp", std::ios::trunc);
header << COPYRIGHT << HEADER;
header.close();
std::ofstream source(outpath + "/" + PROTO_DATA.name + ".cpp", std::ios::trunc);
source << COPYRIGHT << SOURCE;
source.close();
return 0;
}