From ec9a17e71a2923bf3a095086a2966b0e49f997a2 Mon Sep 17 00:00:00 2001
From: Maksim Shabunin <maksim.shabunin@itseez.com>
Date: Fri, 26 Dec 2014 11:57:41 +0300
Subject: [PATCH] Restored PlantUML support for doxygen

---
 CMakeLists.txt     | 15 ++++++++++++++-
 doc/CMakeLists.txt |  5 +++++
 doc/Doxyfile.in    |  1 +
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc83e3c..75fcf96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -473,10 +473,22 @@ include(cmake/OpenCVFindLibsPerf.cmake)
 #  Detect other 3rd-party libraries/tools
 # ----------------------------------------------------------------------------
 
-# --- Doxygen for documentation ---
+# --- Doxygen and PlantUML for documentation ---
 unset(DOXYGEN_FOUND CACHE)
 if(BUILD_DOCS)
   find_package(Doxygen)
+  if (PLANTUML_JAR)
+    message(STATUS "Using PlantUML path from command line: ${PLANTUML_JAR}")
+  elseif(DEFINED ENV{PLANTUML_JAR})
+    set(PLANTUML_JAR $ENV{PLANTUML_JAR})
+    message(STATUS "Using PLantUML path from environment: ${PLANTUML_JAR}")
+  else()
+    message(STATUS "To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR=<filepath> option to cmake")
+  endif()
+  if (PLANTUML_JAR AND DOXYGEN_VERSION VERSION_LESS 1.8.8)
+    message(STATUS "You need Doxygen version 1.8.8 or later to use PlantUML")
+    unset(PLANTUML_JAR)
+  endif()
 endif(BUILD_DOCS)
 
 # --- Python Support ---
@@ -1080,6 +1092,7 @@ if(BUILD_DOCS)
   status("")
   status("  Documentation:")
   status("    Doxygen:"             DOXYGEN_FOUND             THEN "${DOXYGEN_EXECUTABLE} (ver ${DOXYGEN_VERSION})" ELSE NO)
+  status("    PlantUML:"            PLANTUML_JAR              THEN "${PLANTUML_JAR}" ELSE NO)
 endif()
 
 # ========================== samples and tests ==========================
diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 09f9645..67e730a 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -129,6 +129,11 @@ if(BUILD_DOCS AND DOXYGEN_FOUND)
   set(CMAKE_DOXYGEN_MAIN_REFERENCE "${refs_main}")
   set(CMAKE_DOXYGEN_EXTRA_REFERENCE "${refs_extra}")
   set(CMAKE_EXTRA_BIB_FILES "${bibfile} ${paths_bib}")
+  if(PLANTUML_JAR)
+    set(CMAKE_DOXYGEN_PLANTUML_SUPPORT "PLANTUML_JAR_PATH      = ${PLANTUML_JAR}\n")
+  else()
+    set(CMAKE_DOXYGEN_PLANTUML_SUPPORT "ALIASES               += startuml{1}=\"@warning __No plantuml!__ \\n \\n @if DUMMY_PLANTUML_CODE\" enduml=\"@endif\"\n")
+  endif()
 
   # writing file
   configure_file(Doxyfile.in ${doxyfile} @ONLY)
diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index 624e83b..24ef50c 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -285,3 +285,4 @@ DOT_TRANSPARENT        = NO
 DOT_MULTI_TARGETS      = NO
 GENERATE_LEGEND        = YES
 DOT_CLEANUP            = YES
+@CMAKE_DOXYGEN_PLANTUML_SUPPORT@
-- 
2.7.4