cmake_minimum_required(VERSION 3.13)
project(fcitx VERSION 5.1.15)
set(FCITX_VERSION ${PROJECT_VERSION})

find_package(ECM REQUIRED 1.0.0)
set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" ${ECM_MODULE_PATH} ${CMAKE_MODULE_PATH})

#######################################################################
# CMake macros
#######################################################################
include(FeatureSummary)
include(GNUInstallDirs)
include(ECMSetupVersion)
include(GenerateExportHeader)
include(WriteBasicConfigVersionFile)
include(ECMUninstallTarget)
include(src/lib/fcitx-utils/Fcitx5Macros.cmake)
include(CheckSymbolExists)
include(CheckIncludeFile)
include(CheckCXXCompilerFlag)

#######################################################################
# Options
#######################################################################
option(ENABLE_TESTING_ADDONS "Build testing frontend, im and ui addons" On)
option(ENABLE_TEST "Build Test (Need ENABLE_TESTING_ADDONS=On)" On)
option(ENABLE_COVERAGE "Build the project with gcov support (Need ENABLE_TEST=On)" Off)
set(GCOV_TOOL "gcov" CACHE STRING "Path to gcov tool used by coverage.")
set(DEFAULT_XKB_RULES "evdev" CACHE STRING "Xkb rules name")
option(ENABLE_ENCHANT "Enable enchant for word predication" On)
option(ENABLE_X11 "Enable X11 support" On)
option(ENABLE_WAYLAND "Enable wayland support" On)
option(ENABLE_DBUS "Enable DBus" On)
option(ENABLE_DOC "Build doxygen" Off)
option(ENABLE_SERVER "Build a fcitx as server, disable this option if you want to use fcitx as an embedded library." On)
option(ENABLE_KEYBOARD "Enable key event translation with XKB and build keyboard engine" On)
option(USE_SYSTEMD "Use systemd for event loop and dbus, will fallback to libuv/libdbus if not found. Only used when EVENT_LOOP_BACKEND is auto." On)
option(ENABLE_XDGAUTOSTART "Enable xdg autostart desktop file installation" On)
option(USE_FLATPAK_ICON "Use flatpak icon name for desktop files" Off)
option(ENABLE_EMOJI "Enable emoji module" On)
option(ENABLE_LIBUUID "Use libuuid for uuid generation" On)
option(BUILD_SPELL_DICT "Build en_dict.fscd for English spell check" On)
option(BUILD_SHARED_LIBS "Build library as shared libs" On)
set(NO_PREEDIT_APPS "gvim.*,wps.*,wpp.*,et.*" CACHE STRING "Disable preedit for follwing app by default.")
set(EVENT_LOOP_BACKEND "auto" CACHE STRING "Set the underlying event loop implementation, valid values are auto,systemd,libuv,none")

if (ENABLE_EMOJI)
    find_package(ZLIB REQUIRED)
endif()

if ((ENABLE_WAYLAND OR ENABLE_X11) AND NOT ENABLE_KEYBOARD)
    message(FATAL_ERROR "X11 and Wayland require ENABLE_KEYBOARD to be set to ON.")
endif ()

#######################################################################
# Find packages
#######################################################################

find_package(PkgConfig REQUIRED)

set(CANDIDATE_EVENT_LOOP_BACKENDS)

if (EVENT_LOOP_BACKEND STREQUAL "auto")
    if (USE_SYSTEMD)
        list(APPEND CANDIDATE_EVENT_LOOP_BACKENDS systemd)
    endif()

    list(APPEND CANDIDATE_EVENT_LOOP_BACKENDS libuv)
elseif (EVENT_LOOP_BACKEND STREQUAL "systemd")
    list(APPEND CANDIDATE_EVENT_LOOP_BACKENDS systemd)
elseif (EVENT_LOOP_BACKEND STREQUAL "libuv")
    list(APPEND CANDIDATE_EVENT_LOOP_BACKENDS libuv)
elseif (EVENT_LOOP_BACKEND STREQUAL "none")
    list(APPEND CANDIDATE_EVENT_LOOP_BACKENDS none)
endif()

set(FCITX_EVENT_LOOP_BACKEND "")
foreach(CANDIDATE_EVENT_LOOP_BACKEND IN LISTS CANDIDATE_EVENT_LOOP_BACKENDS)
    if (CANDIDATE_EVENT_LOOP_BACKEND STREQUAL systemd)
        find_package(Systemd)
        if (TARGET Systemd::Systemd)
            set(FCITX_EVENT_LOOP_BACKEND "systemd")
            break()
        endif()
    elseif (CANDIDATE_EVENT_LOOP_BACKEND STREQUAL libuv)
        if (NOT LIBUV_TARGET)
            if (NOT (TARGET PkgConfig::LibUV))
                pkg_check_modules(LibUV IMPORTED_TARGET "libuv")
                set(LIBUV_TARGET PkgConfig::LibUV)
            endif()
        endif()

        if (TARGET "${LIBUV_TARGET}")
            set(FCITX_EVENT_LOOP_BACKEND "libuv")
            break()
        endif()
    elseif (CANDIDATE_EVENT_LOOP_BACKEND STREQUAL none)
        set(FCITX_EVENT_LOOP_BACKEND "none")
        break()
    endif()
endforeach()

if (ENABLE_DBUS AND NOT (FCITX_EVENT_LOOP_BACKEND STREQUAL systemd))
    pkg_check_modules(DBus REQUIRED IMPORTED_TARGET "dbus-1")
    pkg_get_variable(DBUS_SYSTEM_BUS_DEFAULT_ADDRESS "dbus-1" "system_bus_default_address")
endif()

if (FCITX_EVENT_LOOP_BACKEND STREQUAL "")
    message(FATAL_ERROR "Failed to find a valid event loop backend. Backends checked: ${CANDIDATE_EVENT_LOOP_BACKENDS}")
endif()

if (USE_FLATPAK_ICON)
    set(FCITX_ICON_NAME "org.fcitx.Fcitx5")
else()
    set(FCITX_ICON_NAME "fcitx")
endif()

if(${CMAKE_SYSTEM_NAME} MATCHES "BSD|DragonFly")
    find_package(LibKVM REQUIRED)
endif()
find_package(DL REQUIRED)

if (NOT TARGET LibIntl::LibIntl)
    find_package(LibIntl REQUIRED)
endif()

if (ENABLE_LIBUUID)
    find_package(LibUUID REQUIRED)
endif()

find_package(Pthread REQUIRED)
find_package(Execinfo)
find_package(Gettext REQUIRED)

set(REQUIRED_XKBCOMMON_COMPONENTS XKBCommon)
if (ENABLE_X11)
    set(REQUIRED_XKBCOMMON_COMPONENTS ${REQUIRED_XKBCOMMON_COMPONENTS} X11)
    find_package(XCB REQUIRED COMPONENTS XCB AUX XKB XFIXES ICCCM XINERAMA RANDR EWMH KEYSYMS)
    find_package(XCBImdkit 1.0.3 REQUIRED)
    pkg_check_modules(CairoXCB REQUIRED IMPORTED_TARGET cairo-xcb)
    pkg_check_modules(XkbFile REQUIRED IMPORTED_TARGET "xkbfile")
endif()

if (ENABLE_KEYBOARD)
    find_package(Expat REQUIRED)
endif()

if (ENABLE_KEYBOARD)
    find_package(XKBCommon REQUIRED COMPONENTS ${REQUIRED_XKBCOMMON_COMPONENTS})
    find_package(IsoCodes REQUIRED)
    find_package(XKeyboardConfig REQUIRED)
    pkg_check_modules(JsonC REQUIRED IMPORTED_TARGET "json-c")

    set(DEFAULT_XKB_RULES_FILES "${XKEYBOARDCONFIG_XKBBASE}/rules/${DEFAULT_XKB_RULES}.xml")
    if (NOT EXISTS "${DEFAULT_XKB_RULES_FILES}" AND NOT APPLE)
        message(WARNING "Could not find default xkb rules file: ${DEFAULT_XKB_RULES_FILES}")
    endif()
endif()

# Library for classicui painting
if (ENABLE_X11 OR ENABLE_WAYLAND)
    pkg_check_modules(Cairo IMPORTED_TARGET cairo)
    pkg_check_modules(Pango IMPORTED_TARGET pango pangocairo)
    pkg_check_modules(GdkPixbuf IMPORTED_TARGET gdk-pixbuf-2.0)
    pkg_check_modules(GioUnix IMPORTED_TARGET gio-unix-2.0)
endif()

if (ENABLE_WAYLAND)
    set(REQUIRED_WAYLAND_COMPONENTS Client Cursor)
    find_package(Wayland 1.22 REQUIRED COMPONENTS ${REQUIRED_WAYLAND_COMPONENTS})
    find_package(WaylandScanner REQUIRED)
    find_package(WaylandProtocols REQUIRED)
    pkg_check_modules(Gio IMPORTED_TARGET gio-2.0)
endif()

if(ENABLE_ENCHANT)
  pkg_check_modules(Enchant IMPORTED_TARGET "enchant-2")
  if(NOT TARGET PkgConfig::Enchant)
    pkg_check_modules(Enchant IMPORTED_TARGET "enchant" REQUIRED)
  endif()
endif()

if (TARGET Wayland::Client AND ENABLE_WAYLAND)
    set(WAYLAND_FOUND TRUE)
else()
    set(WAYLAND_FOUND FALSE)
endif()

# directory needed by bsd
if(NOT CMAKE_INSTALL_LIBDATADIR)
  set(CMAKE_INSTALL_LIBDATADIR "${CMAKE_INSTALL_LIBDIR}" CACHE PATH "libdata root (LIBDIR)")
endif()

GNUInstallDirs_get_absolute_install_dir(CMAKE_INSTALL_FULL_LIBDATADIR CMAKE_INSTALL_LIBDATADIR LIBDATADIR)
mark_as_advanced(CMAKE_INSTALL_LIBDATADIR)
mark_as_advanced(CMAKE_INSTALL_FULL_LIBDATADIR)

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")

include(Fcitx5CompilerSettings)
check_cxx_compiler_flag(-Wno-deprecated-declarations HAVE_NO_DEPRECATED_DECLARATIONS)

set(FCITX_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX})
set(FCITX_INSTALL_SYSCONFDIR ${CMAKE_INSTALL_FULL_SYSCONFDIR})
set(FCITX_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_FULL_INCLUDEDIR})
set(FCITX_INSTALL_LIBDIR ${CMAKE_INSTALL_FULL_LIBDIR})
set(FCITX_INSTALL_LIBDATADIR ${CMAKE_INSTALL_FULL_LIBDATADIR})
set(FCITX_INSTALL_LIBEXECDIR ${CMAKE_INSTALL_FULL_LIBEXECDIR})
set(FCITX_INSTALL_DATADIR ${CMAKE_INSTALL_FULL_DATADIR})
set(FCITX_INSTALL_PKGDATADIR "${CMAKE_INSTALL_FULL_DATADIR}/fcitx5")
set(FCITX_INSTALL_BINDIR ${CMAKE_INSTALL_FULL_BINDIR})
set(FCITX_INSTALL_LOCALEDIR ${CMAKE_INSTALL_FULL_LOCALEDIR})
set(FCITX_INSTALL_ADDONDIR "${CMAKE_INSTALL_FULL_LIBDIR}/fcitx5")
set(FCITX_INSTALL_CMAKECONFIG_DIR "${CMAKE_INSTALL_FULL_LIBDIR}/cmake")
set(FCITX_INSTALL_MODULE_HEADER_DIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}/Fcitx5/Module/fcitx-module")

if (WIN32)
    set(FCITX_LIBRARY_SUFFIX ".dll")
else()
    set(FCITX_LIBRARY_SUFFIX ".so")
endif()

check_function_exists(pipe2 HAVE_PIPE2)
check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
check_include_file(sys/uio.h HAVE_SYS_UIO_H)

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
include_directories(${CMAKE_CURRENT_BINARY_DIR})

add_subdirectory(src)
add_subdirectory(data)
add_subdirectory(po)

if (ENABLE_TESTING_ADDONS)
  add_subdirectory(testing)
endif()

#######################################################################
# Test features
#######################################################################
if (ENABLE_TEST)
    enable_testing()
    add_subdirectory(test)

    if (ENABLE_COVERAGE)
        add_custom_target(coverage
                        COMMAND "${CMAKE_CTEST_COMMAND}"
                        COMMAND lcov --gcov-tool "${GCOV_TOOL}" --no-external --capture --directory ./ -b "${CMAKE_CURRENT_SOURCE_DIR}" --output-file coverage.info
                        COMMAND genhtml coverage.info --output-directory "coverage_pages"
                        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
    endif()
endif ()

if (ENABLE_DOC)
  find_package(Doxygen REQUIRED)
  file(READ "${CMAKE_CURRENT_SOURCE_DIR}/.codedocs" FCITX_DOXYGEN_CONFIGURATION)
  configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in
    ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
    @ONLY)
  add_custom_target(doc
      COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
      COMMENT "Generating API documentation with Doxygen"
      VERBATIM)
endif()

feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)