From 444257b6b17935be5dff11791e9ac9d52cf811b7 Mon Sep 17 00:00:00 2001
From: Tony Crisci <tony@dubstepdish.com>
Date: Mon, 20 Nov 2017 08:51:40 -0500
Subject: [PATCH] xwm: selection init

---
 xwayland/selection.c | 58 ++++++++++++++++++++++++++++++++++++++++----
 xwayland/xwm.c       |  5 ++++
 xwayland/xwm.h       | 10 ++++++++
 3 files changed, 68 insertions(+), 5 deletions(-)

diff --git a/xwayland/selection.c b/xwayland/selection.c
index a83e206c..c80e1db2 100644
--- a/xwayland/selection.c
+++ b/xwayland/selection.c
@@ -9,12 +9,28 @@ static void xwm_handle_selection_notify(struct wlr_xwm *xwm, xcb_generic_event_t
 
 static int xwm_handle_selection_property_notify(struct wlr_xwm *xwm,
 		xcb_generic_event_t *event) {
-	wlr_log(L_DEBUG, "TODO: SELECTION PROPERTY NOTIFY");
-	return 1;
+	xcb_property_notify_event_t *property_notify =
+		(xcb_property_notify_event_t *) event;
+
+	if (property_notify->window == xwm->selection_window) {
+		if (property_notify->state == XCB_PROPERTY_NEW_VALUE &&
+				property_notify->atom == xwm->atoms[WL_SELECTION] &&
+				xwm->incr)
+			wlr_log(L_DEBUG, "TODO: get selection");
+			return 1;
+	} else if (property_notify->window == xwm->selection_request.requestor) {
+		if (property_notify->state == XCB_PROPERTY_DELETE &&
+				property_notify->atom == xwm->selection_request.property &&
+				xwm->incr)
+			wlr_log(L_DEBUG, "TODO: send selection");
+			return 1;
+	}
+
+	return 0;
 }
 
-static void xwm_handle_selection_request(struct wlr_xwm *xwm, xcb_generic_event_t
-		*event) {
+static void xwm_handle_selection_request(struct wlr_xwm *xwm,
+		xcb_generic_event_t *event) {
 	wlr_log(L_DEBUG, "TODO: SELECTION REQUEST");
 	return;
 }
@@ -26,7 +42,8 @@ static int weston_wm_handle_xfixes_selection_notify(struct wlr_xwm *xwm,
 }
 
 
-int xwm_handle_selection_event(struct wlr_xwm *xwm, xcb_generic_event_t *event) {
+int xwm_handle_selection_event(struct wlr_xwm *xwm,
+		xcb_generic_event_t *event) {
 	switch (event->response_type & ~0x80) {
 	case XCB_SELECTION_NOTIFY:
 		xwm_handle_selection_notify(xwm, event);
@@ -45,3 +62,34 @@ int xwm_handle_selection_event(struct wlr_xwm *xwm, xcb_generic_event_t *event)
 
 	return 0;
 }
+
+void xwm_selection_init(struct wlr_xwm *xwm) {
+	uint32_t values[1], mask;
+
+	xwm->selection_request.requestor = XCB_NONE;
+
+	values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
+	xwm->selection_window = xcb_generate_id(xwm->xcb_conn);
+	xcb_create_window(xwm->xcb_conn,
+		XCB_COPY_FROM_PARENT,
+		xwm->selection_window,
+		xwm->screen->root,
+		0, 0,
+		10, 10,
+		0,
+		XCB_WINDOW_CLASS_INPUT_OUTPUT,
+		xwm->screen->root_visual,
+		XCB_CW_EVENT_MASK, values);
+
+	xcb_set_selection_owner(xwm->xcb_conn,
+		xwm->selection_window,
+		xwm->atoms[CLIPBOARD_MANAGER],
+		XCB_TIME_CURRENT_TIME);
+
+	mask =
+		XCB_XFIXES_SELECTION_EVENT_MASK_SET_SELECTION_OWNER |
+		XCB_XFIXES_SELECTION_EVENT_MASK_SELECTION_WINDOW_DESTROY |
+		XCB_XFIXES_SELECTION_EVENT_MASK_SELECTION_CLIENT_CLOSE;
+	xcb_xfixes_select_selection_input(xwm->xcb_conn, xwm->selection_window,
+		xwm->atoms[CLIPBOARD], mask);
+}
diff --git a/xwayland/xwm.c b/xwayland/xwm.c
index c10aab47..febe1ea2 100644
--- a/xwayland/xwm.c
+++ b/xwayland/xwm.c
@@ -43,6 +43,9 @@ const char *atom_map[ATOM_LAST] = {
 	"_NET_WM_STATE_MAXIMIZED_VERT",
 	"_NET_WM_STATE_MAXIMIZED_HORZ",
 	"WM_STATE",
+	"CLIPBOARD",
+	"_WL_SELECTION",
+	"CLIPBOARD_MANAGER",
 };
 
 /* General helpers */
@@ -1339,6 +1342,8 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
 
 	xwm_set_net_active_window(xwm, XCB_WINDOW_NONE);
 
+	xwm_selection_init(xwm);
+
 	xwm->compositor_surface_create.notify = handle_compositor_surface_create;
 	wl_signal_add(&wlr_xwayland->compositor->events.create_surface,
 		&xwm->compositor_surface_create);
diff --git a/xwayland/xwm.h b/xwayland/xwm.h
index f6bec6c5..2daa4eeb 100644
--- a/xwayland/xwm.h
+++ b/xwayland/xwm.h
@@ -31,6 +31,9 @@ enum atom_name {
 	_NET_WM_STATE_MAXIMIZED_VERT,
 	_NET_WM_STATE_MAXIMIZED_HORZ,
 	WM_STATE,
+	CLIPBOARD,
+	CLIPBOARD_MANAGER,
+	WL_SELECTION,
 	ATOM_LAST,
 };
 
@@ -55,6 +58,11 @@ struct wlr_xwm {
 	xcb_render_pictformat_t render_format_id;
 	xcb_cursor_t cursor;
 
+	// selection properties
+	xcb_window_t selection_window;
+	xcb_selection_request_event_t selection_request;
+	int incr;
+
 	struct wlr_xwayland_surface *focus_surface;
 
 	struct wl_list surfaces; // wlr_xwayland_surface::link
@@ -74,4 +82,6 @@ void xwm_set_cursor(struct wlr_xwm *xwm, const uint8_t *pixels, uint32_t stride,
 
 int xwm_handle_selection_event(struct wlr_xwm *xwm, xcb_generic_event_t *event);
 
+void xwm_selection_init(struct wlr_xwm *xwm);
+
 #endif