wlt: toolkit: notify keyboard-cbs whether a key was handled

All keyboard-cbs have to return whether they handled a key now.
Furthermore, they get as parameter a flag that notifies them whether a
previous handled already handled the key.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

src/wlt_terminal.c

@@ -306,14 +306,14 @@ static void widget_prepare_resize(struct wlt_widget *widget,
 	}
 }
 
-static void widget_key(struct wlt_widget *widget, unsigned int mask,
+static bool widget_key(struct wlt_widget *widget, unsigned int mask,
-		       uint32_t sym, uint32_t state, void *data)
+		       uint32_t sym, uint32_t state, bool handled, void *data)
 {
 	struct wlt_terminal *term = data;
 	uint32_t ucs4;
 
-	if (state != WL_KEYBOARD_KEY_STATE_PRESSED)
+	if (handled || state != WL_KEYBOARD_KEY_STATE_PRESSED)
-		return;
+		return false;
 
 	ucs4 = xkb_keysym_to_utf32(sym) ? : TSM_VTE_INVALID;
 
@@ -321,31 +321,34 @@ static void widget_key(struct wlt_widget *widget, unsigned int mask,
 	    sym == wlt_conf.grab_scroll_up->keysym) {
 		tsm_screen_sb_up(term->scr, 1);
 		wlt_window_schedule_redraw(term->wnd);
-		return;
+		return true;
 	}
 	if (SHL_HAS_BITS(mask, wlt_conf.grab_scroll_down->mods) &&
 	    sym == wlt_conf.grab_scroll_down->keysym) {
 		tsm_screen_sb_down(term->scr, 1);
 		wlt_window_schedule_redraw(term->wnd);
-		return;
+		return true;
 	}
 	if (SHL_HAS_BITS(mask, wlt_conf.grab_page_up->mods) &&
 	    sym == wlt_conf.grab_page_up->keysym) {
 		tsm_screen_sb_page_up(term->scr, 1);
 		wlt_window_schedule_redraw(term->wnd);
-		return;
+		return true;
 	}
 	if (SHL_HAS_BITS(mask, wlt_conf.grab_page_down->mods) &&
 	    sym == wlt_conf.grab_page_down->keysym) {
 		tsm_screen_sb_page_down(term->scr, 1);
 		wlt_window_schedule_redraw(term->wnd);
-		return;
+		return true;
 	}
 
 	if (tsm_vte_handle_keyboard(term->vte, sym, mask, ucs4)) {
 		tsm_screen_sb_reset(term->scr);
 		wlt_window_schedule_redraw(term->wnd);
+		return true;
 	}
+
+	return false;
 }
 
 static void vte_event(struct tsm_vte *vte, const char *u8, size_t len,

src/wlt_toolkit.c

@@ -633,6 +633,7 @@ static void keyboard_key(void *data, struct wl_keyboard *keyboard,
 	struct shl_dlist *iter;
 	struct wlt_widget *widget;
 	struct itimerspec spec;
+	bool handled;
 
 	disp->last_serial = serial;
 	if (!disp->xkb_state)
@@ -648,11 +649,14 @@ static void keyboard_key(void *data, struct wl_keyboard *keyboard,
 	if (num_syms == 1)
 		sym = syms[0];
 
+	handled = false;
 	shl_dlist_for_each(iter, &wnd->widget_list) {
 		widget = shl_dlist_entry(iter, struct wlt_widget, list);
-		if (widget->keyboard_cb)
+		if (widget->keyboard_cb) {
-			widget->keyboard_cb(widget, mask, sym, state,
+			if (widget->keyboard_cb(widget, mask, sym, state,
-					    widget->data);
+						handled, widget->data))
+				handled = true;
+		}
 	}
 
 	if (state == WL_KEYBOARD_KEY_STATE_RELEASED &&
@@ -675,17 +679,21 @@ static void repeat_event(struct ev_timer *timer, uint64_t num, void *data)
 	struct wlt_widget *widget;
 	struct shl_dlist *iter;
 	unsigned int mask;
+	bool handled;
 
 	if (!wnd)
 		return;
 
 	mask = shl_get_xkb_mods(disp->xkb_state);
+	handled = false;
 	shl_dlist_for_each(iter, &wnd->widget_list) {
 		widget = shl_dlist_entry(iter, struct wlt_widget, list);
-		if (widget->keyboard_cb)
+		if (widget->keyboard_cb) {
-			widget->keyboard_cb(widget, mask, disp->repeat_sym,
+			if (widget->keyboard_cb(widget, mask, disp->repeat_sym,
-					    WL_KEYBOARD_KEY_STATE_PRESSED,
+						WL_KEYBOARD_KEY_STATE_PRESSED,
-					    widget->data);
+						handled, widget->data))
+				handled = true;
+		}
 	}
 }
 

src/wlt_toolkit.h

@@ -112,10 +112,11 @@ typedef void (*wlt_widget_pointer_button_cb) (struct wlt_widget *widget,
 					      uint32_t button,
 					      uint32_t state,
 					      void *data);
-typedef void (*wlt_widget_keyboard_cb) (struct wlt_widget *widget,
+typedef bool (*wlt_widget_keyboard_cb) (struct wlt_widget *widget,
 					unsigned int mods,
 					uint32_t key,
 					uint32_t state,
+					bool handled,
 					void *data);
 
 int wlt_display_new(struct wlt_display **out,