From f9a9b8550ef8c7ab6c80569525f3218d864b2f3b Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Thu, 16 Sep 2021 22:23:54 +0200
Subject: Window is now closed only if q is pressed

---
 Makefile |  4 ++--
 text.c   | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 52 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index d48d49c..20a8b76 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CFLAGS += -Wall -Wextra -Wpedantic
-CFLAGS += `pkg-config --cflags cairo pango pangocairo xcb xcb-util`
-LDLIBS += -lm `pkg-config --libs cairo pango pangocairo xcb xcb-util`
+CFLAGS += `pkg-config --cflags cairo pango pangocairo xcb xcb-util xkbcommon xkbcommon-x11`
+LDLIBS += -lm `pkg-config --libs cairo pango pangocairo xcb xcb-util xkbcommon xkbcommon-x11`
 
 all: text
 
diff --git a/text.c b/text.c
index 9560edd..6e3da86 100644
--- a/text.c
+++ b/text.c
@@ -9,6 +9,8 @@
 #include <pango/pangocairo.h>
 #include <xcb/xcb.h>
 #include <xcb/xcb_util.h>
+#include <xkbcommon/xkbcommon.h>
+#include <xkbcommon/xkbcommon-x11.h>
 
 enum CommandType
 {
@@ -49,6 +51,14 @@ struct State
 	cairo_surface_t * surface;
 };
 
+struct Keyboard
+{
+	struct xkb_context * ctx;
+	struct xkb_keymap * keymap;
+	int32_t device_id;
+	struct xkb_state * state;
+};
+
 enum Actions
 {
 	ACTION_REDRAW = 1 << 0,
@@ -66,8 +76,9 @@ struct Layout
 };
 
 int setup(struct State *);
+int setup_keyboard(struct State *, struct Keyboard *);
 void finalize(struct State *, struct Layout *);
-int handle(struct State *, xcb_generic_event_t *);
+int handle(struct State *, struct Keyboard *, xcb_generic_event_t *);
 xcb_visualtype_t * find_visual(xcb_screen_t *);
 PangoAttribute * find_link_under(struct State *, PangoLayout *, PangoAttrList *, int, int);
 void arrange(struct State *, struct Layout *, union Command[]);
@@ -114,12 +125,18 @@ int main(int argc, const char ** argv)
 		dprintf(2, "Could not connect to X server\n");
 		return 1;
 	}
+	struct Keyboard keys;
+	if (-1 == setup_keyboard(&state, &keys))
+	{
+		dprintf(2, "Could not set up XKB\n");
+		return 1;
+	}
 	struct Layout layout = {.desc = NULL, .size = 0, .v = NULL};
 	arrange(&state, &layout, body);
 	for (;;)
 	{
 		xcb_generic_event_t * e = xcb_wait_for_event(state.c);  // TODO: All events first, then flagged actions.
-		int actions = handle(&state, e);  // Obviously, right now this may have at most one action.
+		int actions = handle(&state, &keys, e);  // Obviously, right now this may have at most one action.
 		if (ACTION_CLOSE & actions)
 			break;
 		// TODO: Arranging, rearranging and (obviously) reacting to pointer events are all different things.
@@ -163,6 +180,31 @@ int setup(struct State * state)
 }
 
 
+int setup_keyboard(struct State * state, struct Keyboard * keys)
+{
+	unsigned char event;
+	if (!xkb_x11_setup_xkb_extension(
+		state->c,
+		XKB_X11_MIN_MAJOR_XKB_VERSION,
+		XKB_X11_MIN_MINOR_XKB_VERSION,
+		XKB_X11_SETUP_XKB_EXTENSION_NO_FLAGS, NULL, NULL, &event, NULL))
+		return -1;
+	keys->ctx = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
+	if (NULL == keys->ctx)
+		return -1;
+	keys->device_id = xkb_x11_get_core_keyboard_device_id(state->c);
+	if (-1 == keys->device_id)
+		return -1;
+	keys->keymap = xkb_x11_keymap_new_from_device(keys->ctx, state->c, keys->device_id, XKB_KEYMAP_COMPILE_NO_FLAGS);
+	if (NULL == keys->keymap)
+		return -1;
+	keys->state = xkb_x11_state_new_from_device(keys->keymap, state->c, keys->device_id);
+	if (NULL == keys->state)
+		return -1;
+	return 0;
+}
+
+
 void finalize(struct State * state, struct Layout * layout)
 {
 	pango_font_description_free(layout->desc);
@@ -175,13 +217,17 @@ void finalize(struct State * state, struct Layout * layout)
 }
 
 
-int handle(struct State * state, xcb_generic_event_t * e)
+int handle(struct State * state, struct Keyboard * keys, xcb_generic_event_t * e)
 {
 	int actions = 0;
 	switch (XCB_EVENT_RESPONSE_TYPE(e))
 	{
 	case XCB_KEY_PRESS:
-		actions = ACTION_CLOSE;
+		;
+		xcb_key_press_event_t * key = (xcb_key_press_event_t *) e;
+		xkb_keysym_t sym = xkb_state_key_get_one_sym(keys->state, (xkb_keycode_t) key->detail);
+		if (XKB_KEY_q == sym)
+			actions = ACTION_CLOSE;
 		break;
 	case XCB_EXPOSE:
 		actions |= ACTION_REDRAW;
-- 
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