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-rw-r--r--src/Makefile.in7
-rw-r--r--src/xterm.c83
-rw-r--r--src/xterm.h9
3 files changed, 93 insertions, 6 deletions
diff --git a/src/Makefile.in b/src/Makefile.in
index 2b7c4bb316c..0ec2d342646 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -271,6 +271,9 @@ XSYNC_CFLAGS = @XSYNC_CFLAGS@
XDBE_LIBS = @XDBE_LIBS@
XDBE_CFLAGS = @XDBE_CFLAGS@
+XCOMPOSITE_LIBS = @XCOMPOSITE_LIBS@
+XCOMPOSITE_CFLAGS = @XCOMPOSITE_CFLAGS@
+
## widget.o if USE_X_TOOLKIT, otherwise empty.
WIDGET_OBJ=@WIDGET_OBJ@
@@ -402,7 +405,7 @@ EMACS_CFLAGS=-Demacs $(MYCPPFLAGS) -I. -I$(srcdir) \
$(HARFBUZZ_CFLAGS) $(LIBOTF_CFLAGS) $(M17N_FLT_CFLAGS) $(DEPFLAGS) \
$(LIBSYSTEMD_CFLAGS) $(JSON_CFLAGS) $(XSYNC_CFLAGS) \
$(LIBGNUTLS_CFLAGS) $(NOTIFY_CFLAGS) $(CAIRO_CFLAGS) \
- $(WERROR_CFLAGS) $(HAIKU_CFLAGS)
+ $(WERROR_CFLAGS) $(HAIKU_CFLAGS) $(XCOMPOSITE_CFLAGS)
ALL_CFLAGS = $(EMACS_CFLAGS) $(WARN_CFLAGS) $(CFLAGS)
ALL_OBJC_CFLAGS = $(EMACS_CFLAGS) \
$(filter-out $(NON_OBJC_CFLAGS),$(WARN_CFLAGS)) $(CFLAGS) \
@@ -559,7 +562,7 @@ LIBES = $(LIBS) $(W32_LIBS) $(LIBS_GNUSTEP) $(PGTK_LIBS) $(LIBX_BASE) $(LIBIMAGE
$(LIBGNUTLS_LIBS) $(LIB_PTHREAD) $(GETADDRINFO_A_LIBS) $(LCMS2_LIBS) \
$(NOTIFY_LIBS) $(LIB_MATH) $(LIBZ) $(LIBMODULES) $(LIBSYSTEMD_LIBS) \
$(JSON_LIBS) $(LIBGMP) $(LIBGCCJIT_LIBS) $(XINPUT_LIBS) $(HAIKU_LIBS) \
- $(SQLITE3_LIBS)
+ $(SQLITE3_LIBS) $(XCOMPOSITE_LIBS)
## FORCE it so that admin/unidata can decide whether this file is
## up-to-date. Although since charprop depends on bootstrap-emacs,
diff --git a/src/xterm.c b/src/xterm.c
index f7047ff0e88..5c5f24e297d 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -542,6 +542,10 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include <X11/extensions/Xinerama.h>
#endif
+#ifdef HAVE_XCOMPOSITE
+#include <X11/extensions/Xcomposite.h>
+#endif
+
/* Load sys/types.h if not already loaded.
In some systems loading it twice is suicidal. */
#ifndef makedev
@@ -817,6 +821,10 @@ x_dnd_get_target_window (struct x_display_info *dpyinfo,
{
Window child_return, child, dummy, proxy;
int dest_x_return, dest_y_return, rc, proto;
+#if defined HAVE_XCOMPOSITE && (XCOMPOSITE_MAJOR > 0 || XCOMPOSITE_MINOR > 2)
+ Window overlay_window;
+ XWindowAttributes attrs;
+#endif
child_return = dpyinfo->root_window;
dest_x_return = root_x;
dest_y_return = root_y;
@@ -853,7 +861,7 @@ x_dnd_get_target_window (struct x_display_info *dpyinfo,
{
*proto_out = proto;
- x_uncatch_errors_after_check ();
+ x_uncatch_errors ();
return proxy;
}
}
@@ -865,7 +873,7 @@ x_dnd_get_target_window (struct x_display_info *dpyinfo,
if (proto != -1)
{
*proto_out = proto;
- x_uncatch_errors_after_check ();
+ x_uncatch_errors ();
return child_return;
}
@@ -887,8 +895,49 @@ x_dnd_get_target_window (struct x_display_info *dpyinfo,
x_uncatch_errors_after_check ();
}
+#if defined HAVE_XCOMPOSITE && (XCOMPOSITE_MAJOR > 0 || XCOMPOSITE_MINOR > 2)
+ if (child != dpyinfo->root_window)
+ {
+#endif
+ *proto_out = x_dnd_get_window_proto (dpyinfo, child);
+ return child;
+#if defined HAVE_XCOMPOSITE && (XCOMPOSITE_MAJOR > 0 || XCOMPOSITE_MINOR > 2)
+ }
+ else if (dpyinfo->composite_supported_p
+ && (dpyinfo->composite_major > 0
+ || dpyinfo->composite_minor > 2))
+ {
+ /* Only do this if a compositing manager is present. */
+ if (XGetSelectionOwner (dpyinfo->display,
+ dpyinfo->Xatom_NET_WM_CM_Sn) != None)
+ {
+ overlay_window = XCompositeGetOverlayWindow (dpyinfo->display,
+ dpyinfo->root_window);
+ XCompositeReleaseOverlayWindow (dpyinfo->display,
+ dpyinfo->root_window);
+ XGetWindowAttributes (dpyinfo->display, overlay_window, &attrs);
+
+ if (attrs.map_state == IsViewable)
+ {
+ proxy = x_dnd_get_window_proxy (dpyinfo, overlay_window);
+
+ if (proxy != None)
+ {
+ proto = x_dnd_get_window_proto (dpyinfo, proxy);
+
+ if (proto != -1)
+ {
+ *proto_out = proto;
+ return proxy;
+ }
+ }
+ }
+ }
+ }
+
*proto_out = x_dnd_get_window_proto (dpyinfo, child);
return child;
+#endif
}
static Window
@@ -17936,6 +17985,7 @@ x_term_init (Lisp_Object display_name, char *xrm_option, char *resource_name)
#ifdef USE_XCB
xcb_connection_t *xcb_conn;
#endif
+ char *cm_atom_sprintf;
block_input ();
@@ -18217,6 +18267,20 @@ x_term_init (Lisp_Object display_name, char *xrm_option, char *resource_name)
&dpyinfo->xrender_minor);
#endif
+ /* This must come after XRenderQueryVersion! */
+#ifdef HAVE_XCOMPOSITE
+ int composite_event_base, composite_error_base;
+ dpyinfo->composite_supported_p = XCompositeQueryExtension (dpyinfo->display,
+ &composite_event_base,
+ &composite_error_base);
+
+ if (dpyinfo->composite_supported_p)
+ dpyinfo->composite_supported_p
+ = XCompositeQueryVersion (dpyinfo->display,
+ &dpyinfo->composite_major,
+ &dpyinfo->composite_minor);
+#endif
+
/* Put the rdb where we can find it in a way that works on
all versions. */
dpyinfo->rdb = xrdb;
@@ -18576,6 +18640,15 @@ x_term_init (Lisp_Object display_name, char *xrm_option, char *resource_name)
}
{
+ int n = snprintf (NULL, 0, "_NET_WM_CM_S%d",
+ XScreenNumberOfScreen (dpyinfo->screen));
+ cm_atom_sprintf = alloca (n + 1);
+
+ snprintf (cm_atom_sprintf, n + 1, "_NET_WM_CM_S%d",
+ XScreenNumberOfScreen (dpyinfo->screen));
+ }
+
+ {
static const struct
{
const char *name;
@@ -18688,7 +18761,7 @@ x_term_init (Lisp_Object display_name, char *xrm_option, char *resource_name)
int i;
enum { atom_count = ARRAYELTS (atom_refs) };
/* 1 for _XSETTINGS_SN. */
- enum { total_atom_count = 1 + atom_count };
+ enum { total_atom_count = 2 + atom_count };
Atom atoms_return[total_atom_count];
char *atom_names[total_atom_count];
static char const xsettings_fmt[] = "_XSETTINGS_S%d";
@@ -18702,6 +18775,7 @@ x_term_init (Lisp_Object display_name, char *xrm_option, char *resource_name)
sprintf (xsettings_atom_name, xsettings_fmt,
XScreenNumberOfScreen (dpyinfo->screen));
atom_names[i] = xsettings_atom_name;
+ atom_names[i + 1] = cm_atom_sprintf;
XInternAtoms (dpyinfo->display, atom_names, total_atom_count,
False, atoms_return);
@@ -18709,8 +18783,9 @@ x_term_init (Lisp_Object display_name, char *xrm_option, char *resource_name)
for (i = 0; i < atom_count; i++)
*(Atom *) ((char *) dpyinfo + atom_refs[i].offset) = atoms_return[i];
- /* Manually copy last atom. */
+ /* Manually copy last two atoms. */
dpyinfo->Xatom_xsettings_sel = atoms_return[i];
+ dpyinfo->Xatom_NET_WM_CM_Sn = atoms_return[i + 1];
}
#ifdef HAVE_XKB
diff --git a/src/xterm.h b/src/xterm.h
index 9665e92a9fb..05d5e08dc01 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -429,6 +429,9 @@ struct x_display_info
/* Atom used in XEmbed client messages. */
Atom Xatom_XEMBED, Xatom_XEMBED_INFO;
+ /* Atom used to determine whether or not the screen is composited. */
+ Atom Xatom_NET_WM_CM_Sn;
+
/* The frame (if any) which has the X window that has keyboard focus.
Zero if none. This is examined by Ffocus_frame in xfns.c. Note
that a mere EnterNotify event can set this; if you need to know the
@@ -635,6 +638,12 @@ struct x_display_info
#ifdef HAVE_XINERAMA
bool xinerama_supported_p;
#endif
+
+#ifdef HAVE_XCOMPOSITE
+ bool composite_supported_p;
+ int composite_major;
+ int composite_minor;
+#endif
};
#ifdef HAVE_X_I18N
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-19 10:18:01 +0000