desktop-shell: Allow binding-modifier weston.ini option to be none

Allow the binding-modifier option in weston.ini to take a value of
"none", meaning that none of the usual Super+Tab, Super+K, Super+Fn,
etc. key bindings will be enabled.

Signed-off-by: Bob Ham <bob.ham@collabora.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>

desktop-shell/shell.c

@@ -610,6 +610,8 @@ get_modifier(char *modifier)
 		return MODIFIER_ALT;
 	else if (!strcmp("super", modifier))
 		return MODIFIER_SUPER;
+	else if (!strcmp("none", modifier))
+		return 0;
 	else
 		return MODIFIER_SUPER;
 }
@@ -660,10 +662,7 @@ shell_configuration(struct desktop_shell *shell)
 
 	weston_config_section_get_string(section,
 					 "exposay-modifier", &s, "none");
-	if (strcmp(s, "none") == 0)
-		shell->exposay_modifier = 0;
-	else
-		shell->exposay_modifier = get_modifier(s);
+	shell->exposay_modifier = get_modifier(s);
 	free(s);
 
 	weston_config_section_get_string(section, "animation", &s, "none");
@@ -6452,9 +6451,20 @@ shell_add_bindings(struct weston_compositor *ec, struct desktop_shell *shell)
 	weston_compositor_add_axis_binding(ec, WL_POINTER_AXIS_VERTICAL_SCROLL,
 					   MODIFIER_SUPER, zoom_axis_binding,
 					   NULL);
+	weston_compositor_add_key_binding(ec, KEY_BRIGHTNESSDOWN, 0,
+				          backlight_binding, ec);
+	weston_compositor_add_key_binding(ec, KEY_BRIGHTNESSUP, 0,
+				          backlight_binding, ec);
 
 	/* configurable bindings */
+	if (shell->exposay_modifier)
+		weston_compositor_add_modifier_binding(ec, shell->exposay_modifier,
+						       exposay_binding, shell);
+
 	mod = shell->binding_modifier;
+	if (!mod)
+		return;
+
 	weston_compositor_add_key_binding(ec, KEY_PAGEUP, mod,
 					  zoom_key_binding, NULL);
 	weston_compositor_add_key_binding(ec, KEY_PAGEDOWN, mod,
@@ -6480,12 +6490,8 @@ shell_add_bindings(struct weston_compositor *ec, struct desktop_shell *shell)
 					  shell);
 	weston_compositor_add_key_binding(ec, KEY_F9, mod, backlight_binding,
 					  ec);
-	weston_compositor_add_key_binding(ec, KEY_BRIGHTNESSDOWN, 0,
-				          backlight_binding, ec);
 	weston_compositor_add_key_binding(ec, KEY_F10, mod, backlight_binding,
 					  ec);
-	weston_compositor_add_key_binding(ec, KEY_BRIGHTNESSUP, 0,
-				          backlight_binding, ec);
 	weston_compositor_add_key_binding(ec, KEY_K, mod,
 				          force_kill_binding, shell);
 	weston_compositor_add_key_binding(ec, KEY_UP, mod,
@@ -6499,10 +6505,6 @@ shell_add_bindings(struct weston_compositor *ec, struct desktop_shell *shell)
 					  workspace_move_surface_down_binding,
 					  shell);
 
-	if (shell->exposay_modifier)
-		weston_compositor_add_modifier_binding(ec, shell->exposay_modifier,
-						       exposay_binding, shell);
-
 	/* Add bindings for mod+F[1-6] for workspace 1 to 6. */
 	if (shell->workspaces.num > 1) {
 		num_workspace_bindings = shell->workspaces.num;

man/weston.ini.man

@@ -266,7 +266,7 @@ pressed
 sets the modifier key used for common bindings (string), such as moving
 surfaces, resizing, rotating, switching, closing and setting the transparency
 for windows, controlling the backlight and zooming the desktop. Possible values:
-ctrl, alt, super (default)
+none, ctrl, alt, super (default)
 .TP 7
 .BI "num-workspaces=" 6
 defines the number of workspaces (unsigned integer). The user can switch