[client] Add proper stacking support

Signed-off-by: Julien Danjou <julien@danjou.info>

Makefile.am

@@ -115,6 +115,7 @@ awesome_SOURCES = \
 	titlebar.c titlebar.h \
 	placement.c placement.h \
 	focus.c focus.h \
+	stack.c stack.h \
 	cnode.c cnode.h \
 	event.c event.h \
 	layout.c layout.h \

client.c

@@ -35,6 +35,7 @@
 #include "screen.h"
 #include "titlebar.h"
 #include "lua.h"
+#include "stack.h"
 #include "layouts/floating.h"
 #include "common/markup.h"
 #include "common/xutil.h"
@@ -286,52 +287,40 @@ client_focus(client_t *c, int screen, bool raise)
     return true;
 }
 
+/** Restack clients and puts c in top of its layer.
+ * \param c The client to stack on top of others.
+ * \todo It might be worth stopping to restack everyone and only stack `c'
+ * relatively to the first matching in the list
+ */
 void
 client_stack(client_t *c)
 {
     uint32_t config_win_vals[2];
-    client_t *client;
+    client_node_t *node;
     layer_t layer;
 
     config_win_vals[0] = XCB_NONE;
-    config_win_vals[1] = XCB_STACK_MODE_ABOVE;
+    config_win_vals[1] = XCB_STACK_MODE_BELOW;
 
-    for(layer = LAYER_DESKTOP; layer < LAYER_FULLSCREEN; layer++)
+    stack_client_push(c);
+
+    for(layer = LAYER_FULLSCREEN; layer >= LAYER_DESKTOP; layer--)
+        for(node = globalconf.stack; node; node = node->next)
+            if(node->client->layer == layer
+               && client_isvisible_anyscreen(node->client))
             {
-        /* \todo we need to maintain a separate stack list */
-        for(client = globalconf.clients; client; client = client->next)
-        {
-            if(client->layer == layer && client != c
-               && client_isvisible_anyscreen(client))
-            {
-                if(client->titlebar.position && client->titlebar_sw)
+                if(node->client->titlebar.position && node->client->titlebar_sw)
                 {
                     xcb_configure_window(globalconf.connection,
-                                         client->titlebar_sw->window,
+                                         node->client->titlebar_sw->window,
                                          XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE,
                                          config_win_vals);
-                    config_win_vals[0] = client->titlebar_sw->window;
+                    config_win_vals[0] = node->client->titlebar_sw->window;
                 }
-                xcb_configure_window(globalconf.connection, client->win,
+                xcb_configure_window(globalconf.connection, node->client->win,
                                      XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE,
                                      config_win_vals);
-                config_win_vals[0] = client->win;
-            }
-        }
-        if(c->layer == layer)
-        {
-            if(c->titlebar.position && c->titlebar_sw)
-            {
-                xcb_configure_window(globalconf.connection, c->titlebar_sw->window,
-                                     XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE,
-                                     config_win_vals);
-                config_win_vals[0] = c->titlebar_sw->window;
-            }
-            xcb_configure_window(globalconf.connection, c->win,
-                                 XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE,
-                                 config_win_vals);
-            config_win_vals[0] = c->win;
-        }
+                config_win_vals[0] = node->client->win;
             }
 }
 
@@ -653,6 +642,7 @@ client_unmanage(client_t *c)
     /* remove client everywhere */
     client_list_detach(&globalconf.clients, c);
     focus_client_delete(c);
+    stack_client_delete(c);
     for(tag = globalconf.screens[c->screen].tags; tag; tag = tag->next)
         untag_client(c, tag);
 

stack.c

@@ -0,0 +1,52 @@
+/*
+ * stack.c - client stack management
+ *
+ * Copyright © 2008 Julien Danjou <julien@danjou.info>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include "stack.h"
+#include "cnode.h"
+
+extern awesome_t globalconf;
+
+/** Push the client at the beginning of the client stack history stack.
+ * \param c The client to push.
+ */
+void
+stack_client_push(client_t *c)
+{
+    client_node_t *node = client_node_client_add(&globalconf.stack, c);
+    client_node_list_push(&globalconf.stack, node);
+}
+
+/** Remove a client from stack history.
+ * \param c The client.
+ */
+void
+stack_client_delete(client_t *c)
+{
+    client_node_t *node = client_node_client_getby(globalconf.stack, c);
+
+    if(node)
+    {
+        client_node_list_detach(&globalconf.stack, node);
+        p_delete(&node);
+    }
+}
+
+// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80

stack.h

@@ -0,0 +1,31 @@
+/*
+ * stack.h - client stack management header
+ *
+ * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef AWESOME_STACK_H
+#define AWESOME_STACK_H
+
+#include "structs.h"
+
+void stack_client_push(client_t *);
+void stack_client_delete(client_t *);
+
+#endif
+// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80

structs.h

@@ -34,7 +34,7 @@
 /** Stacking layout layers */
 typedef enum
 {
-    LAYER_DESKTOP,
+    LAYER_DESKTOP = 1,
     LAYER_BELOW,
     LAYER_TILE,
     LAYER_FLOAT,
@@ -387,6 +387,8 @@ struct awesome_t
     FloatingPlacement *floating_placement;
     /** Selected clients history */
     client_node_t *focus;
+    /** Stack client history */
+    client_node_t *stack;
     /** Link between tags and clients */
     tag_client_node_t *tclink;
     /** Command line passed to awesome */