Help: Add litehtml as submodule and optionally use that

Change-Id: I528dd661eb0db92e6252ddba7fa38ab58496611a
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: hjk <hjk@qt.io>

.gitmodules

@@ -6,3 +6,6 @@
 	path = src/tools/perfparser
 	url = ../perfparser.git
 	ignore = dirty
+[submodule "litehtml"]
+	path = src/plugins/help/qlitehtml/litehtml
+	url = https://github.com/litehtml/litehtml.git

src/plugins/help/CMakeLists.txt

@@ -49,9 +49,13 @@ extend_qtc_plugin(Help
     webenginehelpviewer.h
 )
 
-find_package(litehtml QUIET)
-if (TARGET litehtml)
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/qlitehtml/litehtml/CMakeLists.txt)
   add_subdirectory(qlitehtml)
+else()
+  find_package(litehtml QUIET)
+  if (TARGET litehtml)
+    add_subdirectory(qlitehtml)
+  endif()
 endif()
 
 extend_qtc_plugin(Help

src/plugins/help/help.pro

@@ -76,7 +76,7 @@ osx {
     }
 }
 
-!isEmpty(LITEHTML_INSTALL_DIR) {
+exists($$PWD/qlitehtml/litehtml/CMakeLists.txt)|!isEmpty(LITEHTML_INSTALL_DIR) {
     include(qlitehtml/qlitehtml.pri)
     HEADERS += litehtmlhelpviewer.h
     SOURCES += litehtmlhelpviewer.cpp

src/plugins/help/qlitehtml/CMakeLists.txt

@@ -7,7 +7,19 @@ set(CMAKE_AUTORCC ON)
 set(CMAKE_AUTOUIC ON)
 set(CMAKE_CXX_STANDARD 14)
 
-find_package(litehtml REQUIRED)
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/litehtml/CMakeLists.txt)
+    set(ORIG_CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE})
+    if (CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
+      set(CMAKE_BUILD_TYPE "RelWithDebInfo")
+    else()
+      set(CMAKE_BUILD_TYPE "Release")
+    endif()
+    add_subdirectory(litehtml)
+    set(CMAKE_BUILD_TYPE ${ORIG_CMAKE_BUILD_TYPE})
+else()
+    find_package(litehtml REQUIRED)
+endif()
+
 find_package(Qt5 COMPONENTS Widgets REQUIRED)
 
 add_library(qlitehtml STATIC

src/plugins/help/qlitehtml/qlitehtml.pri

@@ -1,3 +1,41 @@
+exists($$PWD/litehtml/CMakeLists.txt) {
+    !build_pass|win32 {
+        LITEHTML_BUILD_PATH = "$${OUT_PWD}/litehtml/build"
+        LITEHTML_SOURCE_PATH = "$${PWD}/litehtml"
+        LITEHTML_INSTALL_PATH = "$${OUT_PWD}/litehtml/install"
+
+        BUILD_TYPE = RelWithDebInfo
+        CONFIG(release, debug|release): BUILD_TYPE = Release
+
+        # Create build directory
+        system("$$sprintf($$QMAKE_MKDIR_CMD, $$shell_path($${LITEHTML_BUILD_PATH}))")
+
+        macos: CMAKE_DEPLOYMENT_TARGET = -DCMAKE_OSX_DEPLOYMENT_TARGET=$${QMAKE_MACOSX_DEPLOYMENT_TARGET}
+        LITEHTML_CMAKE_CMD = \
+            "$$QMAKE_CD $$system_quote($$shell_path($${LITEHTML_BUILD_PATH})) && \
+             cmake -DCMAKE_BUILD_TYPE=$$BUILD_TYPE \
+                   -DCMAKE_INSTALL_PREFIX=$$system_quote($$shell_path($${LITEHTML_INSTALL_PATH})) \
+                   $$CMAKE_DEPLOYMENT_TARGET \
+                   $$system_quote($$shell_path($${LITEHTML_SOURCE_PATH}))"
+        message("$${LITEHTML_CMAKE_CMD}")
+        system("$${LITEHTML_CMAKE_CMD}")
+
+        buildlitehtml.commands = "cmake --build $$system_quote($$shell_path($${LITEHTML_BUILD_PATH})) --target install"
+        win32: buildlitehtml.target = $$LITEHTML_INSTALL_PATH/lib/litehtml.lib
+        else:unix: buildlitehtml.target = $$LITEHTML_INSTALL_PATH/lib/liblitehtml.a
+        dummygumbo.depends = buildlitehtml
+        win32: dummygumbo.target = $$LITEHTML_INSTALL_PATH/lib/gumbo.lib
+        else:unix: dummygumbo.target = $$LITEHTML_INSTALL_PATH/lib/libgumbo.a
+        QMAKE_EXTRA_TARGETS += buildlitehtml dummygumbo
+        PRE_TARGETDEPS += $$buildlitehtml.target $$dummygumo.target
+    }
+    LITEHTML_INCLUDE_DIRS = $$LITEHTML_SOURCE_PATH/include $$LITEHTML_SOURCE_PATH/src
+    LITEHTML_LIB_DIR = $$LITEHTML_INSTALL_PATH/lib
+} else {
+    LITEHTML_INCLUDE_DIRS = $$LITEHTML_INSTALL_DIR/include $$LITEHTML_INSTALL_DIR/include/litehtml
+    LITEHTML_LIB_DIR = $$LITEHTML_INSTALL_DIR/lib
+}
+
 HEADERS += \
     $$PWD/container_qpainter.h \
     $$PWD/qlitehtmlwidget.h
@@ -6,8 +44,8 @@ SOURCES += \
     $$PWD/container_qpainter.cpp \
     $$PWD/qlitehtmlwidget.cpp
 
-INCLUDEPATH += $$PWD $$LITEHTML_INSTALL_DIR/include $$LITEHTML_INSTALL_DIR/include/litehtml
-LIBS += -L$$LITEHTML_INSTALL_DIR/lib -llitehtml -lgumbo
+INCLUDEPATH += $$PWD $$LITEHTML_INCLUDE_DIRS
+LIBS += -L$$LITEHTML_LIB_DIR -llitehtml -lgumbo
 
-win32: PRE_TARGET_DEPS += $$LITEHTML_INSTALL_DIR/lib/litehtml.lib $$LITEHTML_INSTALL_DIR/lib/gumbo.lib
-else:unix: PRE_TARGET_DEPS += $$LITEHTML_INSTALL_DIR/lib/liblitehtml.a $$LITEHTML_INSTALL_DIR/lib/libgumbo.a
+win32: PRE_TARGETDEPS += $$LITEHTML_LIB_DIR/litehtml.lib $$LITEHTML_LIB_DIR/gumbo.lib
+else:unix: PRE_TARGETDEPS += $$LITEHTML_LIB_DIR/liblitehtml.a $$LITEHTML_LIB_DIR/libgumbo.a