From 442f78119cb474988831f44b2d8c6dc26c4862e5 Mon Sep 17 00:00:00 2001
From: Denis Gorodnichev <denis.gorodnichev@gmail.com>
Date: Fri, 5 Sep 2014 23:06:54 +0400
Subject: [PATCH] add support for x11 shape extension

x11 shape extension (version >= 1.1) provide ability to set up input region
set up empty input region for undecorated window to create transparent window for mouse events
---
 cmake/ConkyBuildOptions.cmake   |  2 ++
 cmake/ConkyPlatformChecks.cmake |  7 +++++++
 cmake/config.h.in               |  2 ++
 src/x11.cc                      | 22 ++++++++++++++++++++++
 4 files changed, 33 insertions(+)

diff --git a/cmake/ConkyBuildOptions.cmake b/cmake/ConkyBuildOptions.cmake
index dc428890..9de30072 100644
--- a/cmake/ConkyBuildOptions.cmake
+++ b/cmake/ConkyBuildOptions.cmake
@@ -108,12 +108,14 @@ if(BUILD_X11)
 	option(BUILD_XDBE "Build Xdbe (double-buffer) support" false)
 	option(BUILD_XFT "Build Xft (freetype fonts) support" true)
 	option(BUILD_IMLIB2 "Enable Imlib2 support" false)
+	option(BUILD_XSHAPE "Enable Xshape support" false)
 else(BUILD_X11)
 	set(OWN_WINDOW false CACHE BOOL "Enable own_window support" FORCE)
 	set(BUILD_XDAMAGE false CACHE BOOL "Build Xdamage support" FORCE)
 	set(BUILD_XDBE false CACHE BOOL "Build Xdbe (double-buffer) support" FORCE)
 	set(BUILD_XFT false CACHE BOOL "Build Xft (freetype fonts) support" FORCE)
 	set(BUILD_IMLIB2 false CACHE BOOL "Enable Imlib2 support" FORCE)
+	set(BUILD_XSHAPE false CACHE BOOL "Enable Xshape support" FORCE)
 endif(BUILD_X11)
 
 if(OWN_WINDOW)
diff --git a/cmake/ConkyPlatformChecks.cmake b/cmake/ConkyPlatformChecks.cmake
index 5a4b006a..dfea04a3 100644
--- a/cmake/ConkyPlatformChecks.cmake
+++ b/cmake/ConkyPlatformChecks.cmake
@@ -203,6 +203,13 @@ if(BUILD_X11)
 			set(conky_libs ${conky_libs} ${X11_Xdamage_LIB} ${X11_Xfixes_LIB})
 		endif(BUILD_XDAMAGE)
 
+		if(BUILD_XSHAPE)
+			if(NOT X11_Xshape_FOUND)
+				message(FATAL_ERROR "Unable to find Xshape library")
+			endif(NOT X11_Xshape_FOUND)
+			set(conky_libs ${conky_libs} ${X11_Xshape_LIB} )
+		endif(BUILD_XSHAPE)
+
 		# check for Xft
 		if(BUILD_XFT)
 			find_path(freetype_INCLUDE_PATH freetype/config/ftconfig.h ${INCLUDE_SEARCH_PATH}
diff --git a/cmake/config.h.in b/cmake/config.h.in
index 2d3ef629..c9516457 100644
--- a/cmake/config.h.in
+++ b/cmake/config.h.in
@@ -44,6 +44,8 @@
 
 #cmakedefine BUILD_XFT 1
 
+#cmakedefine BUILD_XSHAPE 1
+
 #cmakedefine BUILD_ARGB 1
 
 #cmakedefine BUILD_XDBE 1
diff --git a/src/x11.cc b/src/x11.cc
index 86910759..59bb3d8e 100644
--- a/src/x11.cc
+++ b/src/x11.cc
@@ -47,6 +47,10 @@
 #ifdef BUILD_XFT
 #include <X11/Xft/Xft.h>
 #endif
+#ifdef BUILD_XSHAPE
+#include <X11/extensions/shape.h>
+#include <X11/extensions/shapeconst.h>
+#endif
 
 #ifdef BUILD_ARGB
 bool have_argb_visual;
@@ -714,6 +718,24 @@ static void init_window(lua::state &l __attribute__((unused)), bool own)
 			/* allow decorated windows to be given input focus by WM */
 			wmHint.input =
 				TEST_HINT(hints, HINT_UNDECORATED) ? False : True;
+#ifdef BUILD_XSHAPE
+			if (!wmHint.input) {
+				int event_base, error_base;
+				if (XShapeQueryExtension(display, &event_base, &error_base)) {
+					int major_version = 0, minor_version = 0;
+					XShapeQueryVersion(display, &major_version, &minor_version);
+					if ((major_version > 1) || ((major_version == 1) && (minor_version >=1))) {
+						Region empty_region = XCreateRegion();
+						XShapeCombineRegion(display, window.window, ShapeInput, 0, 0, empty_region, ShapeSet);
+						XDestroyRegion(empty_region);
+					} else {
+						NORM_ERR("Input shapes are not supported");
+					}
+				} else {
+					NORM_ERR("No shape extension found");
+				}
+			}
+#endif
 			if (own_window_type.get(l) == TYPE_DOCK || own_window_type.get(l) == TYPE_PANEL) {
 				wmHint.initial_state = WithdrawnState;
 			} else {