Use common cmake rules for documentation.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

doc/CMakeLists.txt

@@ -1 +1,34 @@
-tde_auto_add_subdirectories( )
+file( GLOB _dirs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} * )
+list( REMOVE_ITEM _dirs html man )
+
+string( REGEX REPLACE "[ \r\n\t]+" ";" _linguas "$ENV{LINGUAS}" )
+
+foreach( _dir IN LISTS _dirs )
+  if( IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${_dir}
+      AND ( "${_dir}" STREQUAL "en" OR
+            "${_linguas}" MATCHES "^;*$" OR
+            ";${_linguas};" MATCHES ";${_dir};" ))
+    file( GLOB _doc_files RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}/${_dir} ${_dir}/*.docbook )
+    if( _doc_files )
+      list( FIND _doc_files "index.docbook" _find_index )
+      if( -1 EQUAL _find_index )
+        set( _noindex "NOINDEX" )
+      else()
+        unset( _noindex )
+      endif()
+      tde_create_handbook(
+        SOURCE_BASEDIR ${_dir}
+        ${_noindex}
+        LANG ${_dir}
+        DESTINATION ${PROJECT_NAME}
+      )
+    endif()
+  endif()
+endforeach()
+
+if( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/html/CMakeLists.txt )
+  add_subdirectory( html )
+endif()
+if( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/man/CMakeLists.txt )
+  add_subdirectory( man )
+endif()

doc/en/CMakeLists.txt

@@ -1,5 +0,0 @@
-file( GLOB _srcs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.docbook *.css *.png *.jpg )
-tde_create_handbook(
-    FILES ${_srcs}
-    DESTINATION ${PROJECT_NAME}
-)