squash! [wip] Add ToggleShade

Add default mouse bindings, document actions

docs/labwc-actions.5.scd

@@ -226,6 +226,15 @@ Actions are used in menus and keyboard/mouse bindings.
 	Use the automatic placement policy to move the active window to a
 	position on its output that will minimize overlap with other windows.
 
+*<action name="Shade" />*++
+*<action name="Unshade" />*++
+*<action name="ToggleShade" />*
+	Set, unset, or toggle, respectively, the "shaded" state of the active
+	window. When shaded, window contents are hidden, leaving only the
+	titlebar visible. Full-screen windows or those without server-side
+	decorations (including those for which the server-side titlebar has been
+	hidden) are not eligible for shading.
+
 *<action name="None" />*
 	If used as the only action for a binding: clear an earlier defined binding.
 

docs/rc.xml.all

@@ -312,6 +312,14 @@
         <action name="Focus" />
         <action name="Raise" />
       </mousebind>
+      <mousebind direction="Up" action="Scroll">
+        <action name="Unshade" />
+        <action name="Focus" />
+      </mousebind>
+      <mousebind direction="Down" action="Scroll">
+        <action name="Unfocus" />
+        <action name="Shade" />
+      </mousebind>
     </context>
 
     <context name="Title">

src/config/rcxml.c

@@ -1162,6 +1162,10 @@ static struct mouse_combos {
 	{ "Frame", "A-Right", "Drag", "Resize", NULL, NULL},
 	{ "Titlebar", "Left", "Press", "Focus", NULL, NULL},
 	{ "Titlebar", "Left", "Press", "Raise", NULL, NULL},
+	{ "Titlebar", "Up", "Scroll", "Unfocus", NULL, NULL},
+	{ "Titlebar", "Up", "Scroll", "Shade", NULL, NULL},
+	{ "Titlebar", "Down", "Scroll", "Unshade", NULL, NULL},
+	{ "Titlebar", "Down", "Scroll", "Focus", NULL, NULL},
 	{ "Title", "Left", "Drag", "Move", NULL, NULL },
 	{ "Title", "Left", "DoubleClick", "ToggleMaximize", NULL, NULL },
 	{ "TitleBar", "Right", "Click", "Focus", NULL, NULL},