CMake: Add GTK Printing support

See #22745

build/cmake/init.cmake

@@ -564,6 +564,19 @@ if(wxUSE_GUI)
         set(wxUSE_LIBMSPACK OFF)
     endif()
 
+    if(WXGTK AND wxUSE_PRINTING_ARCHITECTURE AND wxUSE_GTKPRINT)
+        find_package(GTKPRINT ${wxTOOLKIT_VERSION})
+        if(GTKPRINT_FOUND)
+            list(APPEND wxTOOLKIT_INCLUDE_DIRS ${GTKPRINT_INCLUDE_DIRS})
+            list(APPEND wxTOOLKIT_EXTRA "GTK+ printing")
+        else()
+            message(STATUS "GTK printing support not found (GTK+ >= 2.10), library will use GNOME printing support or standard PostScript printing")
+            wx_option_force_value(wxUSE_GTKPRINT OFF)
+        endif()
+    else()
+        set(wxUSE_GTKPRINT OFF)
+    endif()
+
     if(WXGTK AND wxUSE_MIMETYPE AND wxUSE_LIBGNOMEVFS)
         find_package(GNOMEVFS2)
         if(GNOMEVFS2_FOUND)

build/cmake/modules/FindGTKPRINT.cmake

@@ -0,0 +1,33 @@
+# - Try to find GTK Print
+# Provide the GTK version as argument
+# Once done this will define
+#
+#  GTKPRINT_FOUND - system has GTK Print
+#  GTKPRINT_INCLUDE_DIRS - The include directory to use for the GTK Print headers
+
+if(NOT GTKPRINT_FIND_VERSION EQUAL GTKPRINT_FIND_VERSION_USED)
+    unset(GTKPRINT_FOUND CACHE)
+    unset(GTKPRINT_INCLUDE_DIRS CACHE)
+    unset(GTKPRINT_FIND_VERSION_USED CACHE)
+endif()
+set(GTKPRINT_FIND_VERSION_USED "${GTKPRINT_FIND_VERSION}" CACHE INTERNAL "")
+
+if(GTKPRINT_FIND_VERSION VERSION_LESS 3.0)
+    set(GTKPRINT_LIB_NAME "gtk+-unix-print-2.0")
+else()
+    set(GTKPRINT_LIB_NAME "gtk+-unix-print-3.0")
+endif()
+
+find_package(PkgConfig)
+pkg_check_modules(PC_GTKPRINT QUIET ${GTKPRINT_LIB_NAME})
+
+find_path(GTKPRINT_INCLUDE_DIRS
+    NAMES gtk/gtkunixprint.h
+    HINTS ${PC_GTKPRINT_INCLUDEDIR}
+          ${PC_GTKPRINT_INCLUDE_DIRS}
+)
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(GTKPRINT DEFAULT_MSG GTKPRINT_INCLUDE_DIRS)
+
+mark_as_advanced(GTKPRINT_INCLUDE_DIRS)

build/cmake/options.cmake

@@ -127,6 +127,7 @@ if(UNIX)
     wx_option(wxUSE_LIBNOTIFY "use libnotify for notifications")
     wx_option(wxUSE_XTEST "use XTest extension")
     wx_option(wxUSE_LIBMSPACK "use libmspack (CHM help files loading)")
+    wx_option(wxUSE_GTKPRINT "use GTK printing support")
     wx_option(wxUSE_LIBGNOMEVFS "use GNOME VFS for associating MIME types")
     wx_option(wxUSE_GLCANVAS_EGL "use EGL backend for wxGLCanvas")