# Try to find XCB on a Unix system
#
# This will define:
#
# XCB_FOUND        - True if xcb is available XCB_LIBRARIES    - Link these to
# use xcb XCB_INCLUDE_DIRS - Include directory for xcb XCB_DEFINITIONS  -
# Compiler flags for using xcb
#
# In addition the following more fine grained variables will be defined:
#
# XCB_XCB_FOUND        XCB_XCB_INCLUDE_DIR        XCB_XCB_LIBRARY XCB_UTIL_FOUND
# XCB_UTIL_INCLUDE_DIR       XCB_UTIL_LIBRARY XCB_COMPOSITE_FOUND
# XCB_COMPOSITE_INCLUDE_DIR  XCB_COMPOSITE_LIBRARY XCB_DAMAGE_FOUND
# XCB_DAMAGE_INCLUDE_DIR     XCB_DAMAGE_LIBRARY XCB_XFIXES_FOUND
# XCB_XFIXES_INCLUDE_DIR     XCB_XFIXES_LIBRARY XCB_RENDER_FOUND
# XCB_RENDER_INCLUDE_DIR     XCB_RENDER_LIBRARY XCB_RANDR_FOUND
# XCB_RANDR_INCLUDE_DIR      XCB_RANDR_LIBRARY XCB_SHAPE_FOUND
# XCB_SHAPE_INCLUDE_DIR      XCB_SHAPE_LIBRARY XCB_DRI2_FOUND
# XCB_DRI2_INCLUDE_DIR       XCB_DRI2_LIBRARY XCB_GLX_FOUND XCB_GLX_INCLUDE_DIR
# XCB_GLX_LIBRARY XCB_SHM_FOUND XCB_SHM_INCLUDE_DIR        XCB_SHM_LIBRARY
# XCB_XV_FOUND XCB_XV_INCLUDE_DIR         XCB_XV_LIBRARY XCB_XINPUT_FOUND
# XCB_XINPUT_INCLUDE_DIR     XCB_XINPUT_LIBRARY XCB_SYNC_FOUND
# XCB_SYNC_INCLUDE_DIR       XCB_SYNC_LIBRARY XCB_XTEST_FOUND
# XCB_XTEST_INCLUDE_DIR      XCB_XTEST_LIBRARY XCB_ICCCM_FOUND
# XCB_ICCCM_INCLUDE_DIR      XCB_ICCCM_LIBRARY XCB_EWMH_FOUND
# XCB_EWMH_INCLUDE_DIR       XCB_EWMH_LIBRARY XCB_IMAGE_FOUND
# XCB_IMAGE_INCLUDE_DIR      XCB_IMAGE_LIBRARY XCB_RENDERUTIL_FOUND
# XCB_RENDERUTIL_INCLUDE_DIR XCB_RENDERUTIL_LIBRARY XCB_KEYSYMS_FOUND
# XCB_KEYSYMS_INCLUDE_DIR    XCB_KEYSYMS_LIBRARY
#
# Copyright (c) 2011 Fredrik Höglund <fredrik@kde.org> Copyright (c) 2013 Martin
# Gräßlin <mgraesslin@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.

set(knownComponents
    XCB
    COMPOSITE
    DAMAGE
    DRI2
    EWMH
    GLX
    ICCCM
    IMAGE
    KEYSYMS
    RANDR
    RENDER
    RENDERUTIL
    SHAPE
    SHM
    SYNC
    UTIL
    XFIXES
    XTEST
    XV
    XINPUT
    XINERAMA)

unset(unknownComponents)

set(pkgConfigModules)
set(requiredComponents)

if(XCB_FIND_COMPONENTS)
  set(comps ${XCB_FIND_COMPONENTS})
else()
  set(comps ${knownComponents})
endif()

# iterate through the list of requested components, and check that we know them
# all. If not, fail.
foreach(comp ${comps})
  list(FIND knownComponents ${comp} index)
  if("${index}" STREQUAL "-1")
    list(APPEND unknownComponents "${comp}")
  else()
    if("${comp}" STREQUAL "XCB")
      list(APPEND pkgConfigModules "xcb")
    elseif("${comp}" STREQUAL "COMPOSITE")
      list(APPEND pkgConfigModules "xcb-composite")
    elseif("${comp}" STREQUAL "DAMAGE")
      list(APPEND pkgConfigModules "xcb-damage")
    elseif("${comp}" STREQUAL "DRI2")
      list(APPEND pkgConfigModules "xcb-dri2")
    elseif("${comp}" STREQUAL "EWMH")
      list(APPEND pkgConfigModules "xcb-ewmh")
    elseif("${comp}" STREQUAL "GLX")
      list(APPEND pkgConfigModules "xcb-glx")
    elseif("${comp}" STREQUAL "ICCCM")
      list(APPEND pkgConfigModules "xcb-icccm")
    elseif("${comp}" STREQUAL "IMAGE")
      list(APPEND pkgConfigModules "xcb-image")
    elseif("${comp}" STREQUAL "KEYSYMS")
      list(APPEND pkgConfigModules "xcb-keysyms")
    elseif("${comp}" STREQUAL "RANDR")
      list(APPEND pkgConfigModules "xcb-randr")
    elseif("${comp}" STREQUAL "RENDER")
      list(APPEND pkgConfigModules "xcb-render")
    elseif("${comp}" STREQUAL "RENDERUTIL")
      list(APPEND pkgConfigModules "xcb-renderutil")
    elseif("${comp}" STREQUAL "SHAPE")
      list(APPEND pkgConfigModules "xcb-shape")
    elseif("${comp}" STREQUAL "SHM")
      list(APPEND pkgConfigModules "xcb-shm")
    elseif("${comp}" STREQUAL "SYNC")
      list(APPEND pkgConfigModules "xcb-sync")
    elseif("${comp}" STREQUAL "UTIL")
      list(APPEND pkgConfigModules "xcb-util")
    elseif("${comp}" STREQUAL "XFIXES")
      list(APPEND pkgConfigModules "xcb-xfixes")
    elseif("${comp}" STREQUAL "XTEST")
      list(APPEND pkgConfigModules "xcb-xtest")
    elseif("${comp}" STREQUAL "XV")
      list(APPEND pkgConfigModules "xcb-xv")
    elseif("${comp}" STREQUAL "XINPUT")
      list(APPEND pkgConfigModules "xcb-xinput")
    elseif("${comp}" STREQUAL "XINERAMA")
      list(APPEND pkgConfigModules "xcb-xinerama")
    endif()
  endif()
endforeach()

if(DEFINED unknownComponents)
  set(msgType STATUS)
  if(XCB_FIND_REQUIRED)
    set(msgType FATAL_ERROR)
  endif()
  if(NOT XCB_FIND_QUIETLY)
    message(${msgType} "XCB: requested unknown components ${unknownComponents}")
  endif()
  return()
endif()

macro(_XCB_HANDLE_COMPONENT _comp)
  set(_header)
  set(_lib)
  if("${_comp}" STREQUAL "XCB")
    set(_header "xcb/xcb.h")
    set(_lib "xcb")
  elseif("${_comp}" STREQUAL "COMPOSITE")
    set(_header "xcb/composite.h")
    set(_lib "xcb-composite")
  elseif("${_comp}" STREQUAL "DAMAGE")
    set(_header "xcb/damage.h")
    set(_lib "xcb-damage")
  elseif("${_comp}" STREQUAL "DRI2")
    set(_header "xcb/dri2.h")
    set(_lib "xcb-dri2")
  elseif("${_comp}" STREQUAL "EWMH")
    set(_header "xcb/xcb_ewmh.h")
    set(_lib "xcb-ewmh")
  elseif("${_comp}" STREQUAL "GLX")
    set(_header "xcb/glx.h")
    set(_lib "xcb-glx")
  elseif("${_comp}" STREQUAL "ICCCM")
    set(_header "xcb/xcb_icccm.h")
    set(_lib "xcb-icccm")
  elseif("${_comp}" STREQUAL "IMAGE")
    set(_header "xcb/xcb_image.h")
    set(_lib "xcb-image")
  elseif("${_comp}" STREQUAL "KEYSYMS")
    set(_header "xcb/xcb_keysyms.h")
    set(_lib "xcb-keysyms")
  elseif("${_comp}" STREQUAL "RANDR")
    set(_header "xcb/randr.h")
    set(_lib "xcb-randr")
  elseif("${_comp}" STREQUAL "RENDER")
    set(_header "xcb/render.h")
    set(_lib "xcb-render")
  elseif("${_comp}" STREQUAL "RENDERUTIL")
    set(_header "xcb/xcb_renderutil.h")
    set(_lib "xcb-render-util")
  elseif("${_comp}" STREQUAL "SHAPE")
    set(_header "xcb/shape.h")
    set(_lib "xcb-shape")
  elseif("${_comp}" STREQUAL "SHM")
    set(_header "xcb/shm.h")
    set(_lib "xcb-shm")
  elseif("${_comp}" STREQUAL "SYNC")
    set(_header "xcb/sync.h")
    set(_lib "xcb-sync")
  elseif("${_comp}" STREQUAL "UTIL")
    set(_header "xcb/xcb_util.h")
    set(_lib "xcb-util")
  elseif("${_comp}" STREQUAL "XFIXES")
    set(_header "xcb/xfixes.h")
    set(_lib "xcb-xfixes")
  elseif("${_comp}" STREQUAL "XTEST")
    set(_header "xcb/xtest.h")
    set(_lib "xcb-xtest")
  elseif("${_comp}" STREQUAL "XV")
    set(_header "xcb/xv.h")
    set(_lib "xcb-xv")
  elseif("${_comp}" STREQUAL "XINPUT")
    set(_header "xcb/xinput.h")
    set(_lib "xcb-xinput")
  elseif("${_comp}" STREQUAL "XINERAMA")
    set(_header "xcb/xinerama.h")
    set(_lib "xcb-xinerama")
  endif()

  find_path(
    XCB_${_comp}_INCLUDE_DIR
    NAMES ${_header}
    HINTS ${PKG_XCB_INCLUDE_DIRS})
  find_library(
    XCB_${_comp}_LIBRARY
    NAMES ${_lib}
    HINTS ${PKG_XCB_LIBRARY_DIRS})
  mark_as_advanced(XCB_${_comp}_LIBRARY XCB_${_comp}_INCLUDE_DIR)

  if(XCB_${_comp}_INCLUDE_DIR AND XCB_${_comp}_LIBRARY)
    set(XCB_${_comp}_FOUND TRUE)
    list(APPEND XCB_INCLUDE_DIRS ${XCB_${_comp}_INCLUDE_DIR})
    list(APPEND XCB_LIBRARIES ${XCB_${_comp}_LIBRARY})
    if(NOT XCB_FIND_QUIETLY)
      message(STATUS "XCB[${_comp}]: Found component ${_comp}")
    endif()
  endif()
endmacro()

if(NOT ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
  # Use pkg-config to get the directories and then use these values in the
  # FIND_PATH() and FIND_LIBRARY() calls
  find_package(PkgConfig)
  pkg_check_modules(PKG_XCB QUIET ${pkgConfigModules})

  set(XCB_DEFINITIONS ${PKG_XCB_CFLAGS})

  foreach(comp ${comps})
    _xcb_handle_component(${comp})
  endforeach()

  if(XCB_INCLUDE_DIRS)
    list(REMOVE_DUPLICATES XCB_INCLUDE_DIRS)
  endif()

  include(FindPackageHandleStandardArgs)
  find_package_handle_standard_args(
    XCB
    REQUIRED_VARS XCB_LIBRARIES XCB_INCLUDE_DIRS
    HANDLE_COMPONENTS)

  # compatibility for old variable naming
  set(XCB_INCLUDE_DIR ${XCB_INCLUDE_DIRS})
endif()

if(XCB_FOUND AND NOT TARGET XCB::XCB)
  foreach(component ${comps})
    if(NOT TARGET XCB::${component})
      string(TOUPPER ${component} component_u)
      if(XCB_${component_u}_FOUND)
        if(IS_ABSOLUTE "${XCB_${component_u}_LIBRARY}")
          add_library(XCB::${component} UNKNOWN IMPORTED)
          set_target_properties(
            XCB::${component} PROPERTIES IMPORTED_LOCATION
                                         "${XCB_${component_u}_LIBRARY}")
        else()
          add_library(XCB::${component} INTERFACE IMPORTED)
          set_target_properties(
            XCB::${component} PROPERTIES IMPORTED_LIBNAME
                                         "${XCB_${component_u}_LIBRARY}")
        endif()

        set_target_properties(
          XCB::${component} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
                                       "${XCB_${component_u}_INCLUDE_DIR}")
      endif()
    endif()
  endforeach()
endif()
