cmake_minimum_required(VERSION 3.0)
project(displayserver_Wayland LANGUAGES C)

find_package(PkgConfig)
pkg_check_modules(DISPLAYSERVER_Wayland REQUIRED IMPORTED_TARGET
  wayland-client
  wayland-cursor
  xkbcommon
)

set(DISPLAYSERVER_Wayland_OPT_PKGCONFIG_LIBRARIES "")
set(displayserver_Wayland_SHELL_SRC "")

if (ENABLE_LIBDECOR)
  pkg_check_modules(DISPLAYSERVER_Wayland_LIBDECOR REQUIRED IMPORTED_TARGET
    libdecor-0
  )
  list(APPEND DISPLAYSERVER_Wayland_OPT_PKGCONFIG_LIBRARIES PkgConfig::DISPLAYSERVER_Wayland_LIBDECOR)
  list(APPEND displayserver_Wayland_SHELL_SRC shell_libdecor.c)
  add_compile_definitions(ENABLE_LIBDECOR)
else()
  list(APPEND displayserver_Wayland_SHELL_SRC shell_xdg.c)
endif()

add_library(displayserver_Wayland STATIC
  activation.c
  clipboard.c
  cursor.c
  gl.c
  idle.c
  input.c
  output.c
  poll.c
  presentation.c
  state.c
  registry.c
  wayland.c
  window.c
  ${displayserver_Wayland_SHELL_SRC}
)

target_link_libraries(displayserver_Wayland
  PkgConfig::DISPLAYSERVER_Wayland
  ${DISPLAYSERVER_Wayland_OPT_PKGCONFIG_LIBRARIES}
  lg_common
)

target_include_directories(displayserver_Wayland
  PRIVATE
    src
)

find_program(WAYLAND_SCANNER_EXECUTABLE NAMES wayland-scanner)

macro(wayland_generate protocol_file output_file)
  add_custom_command(OUTPUT "${output_file}.h"
    COMMAND "${WAYLAND_SCANNER_EXECUTABLE}" client-header "${protocol_file}" "${output_file}.h"
    DEPENDS "${protocol_file}"
    VERBATIM)

  add_custom_command(OUTPUT "${output_file}.c"
    COMMAND "${WAYLAND_SCANNER_EXECUTABLE}" private-code "${protocol_file}" "${output_file}.c"
    DEPENDS "${protocol_file}"
    VERBATIM)

  target_sources(displayserver_Wayland PRIVATE "${output_file}.h" "${output_file}.c")
endmacro()

set(WAYLAND_PROTOCOLS_BASE "${PROJECT_TOP}/repos/wayland-protocols")
file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/wayland")
include_directories("${CMAKE_BINARY_DIR}/wayland")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/stable/xdg-shell/xdg-shell.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-xdg-shell-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/stable/presentation-time/presentation-time.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-presentation-time-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/stable/viewporter/viewporter.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-viewporter-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/unstable/xdg-decoration/xdg-decoration-unstable-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-xdg-decoration-unstable-v1-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/unstable/relative-pointer/relative-pointer-unstable-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-relative-pointer-unstable-v1-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-pointer-constraints-unstable-v1-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/unstable/keyboard-shortcuts-inhibit/keyboard-shortcuts-inhibit-unstable-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-keyboard-shortcuts-inhibit-unstable-v1-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/unstable/idle-inhibit/idle-inhibit-unstable-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-idle-inhibit-unstable-v1-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/unstable/xdg-output/xdg-output-unstable-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-xdg-output-unstable-v1-client-protocol")
wayland_generate(
  "${WAYLAND_PROTOCOLS_BASE}/staging/xdg-activation/xdg-activation-v1.xml"
  "${CMAKE_BINARY_DIR}/wayland/wayland-xdg-activation-v1-client-protocol")