Fix problem when moving fullscreen window to scratchpad

When moving a fullscreen window to scratchpad with 'move scratchpad', the
focused window would stay fullscreen.

Also, when having a container in fullscreen mode and then focusing a child of
this container and moving it to scratchpad, it would enable fullscreen for
the child window.

This patch fixes both problems, so the scratchpad window is always floating.

src/scratchpad.c

@@ -39,6 +39,12 @@ void scratchpad_move(Con *con) {
         return;
     }
 
+    /* If the current con is in fullscreen mode, we need to disable that,
+     *  as a scratchpad window should never be in fullscreen mode */
+    if (focused && focused->type != CT_WORKSPACE && focused->fullscreen_mode != CF_NONE) {
+        con_toggle_fullscreen(focused, CF_OUTPUT);
+    }
+
     /* 1: Ensure the window or any parent is floating. From now on, we deal
      * with the CT_FLOATING_CON. We use automatic == false because the user
      * made the choice that this window should be a scratchpad (and floating).
@@ -78,16 +84,6 @@ void scratchpad_show(Con *con) {
     Con *__i3_scratch = workspace_get("__i3_scratch", NULL);
     Con *floating;
 
-    /* If the current con or any of its parents are in fullscreen mode, we
-     * first need to disable it before showing the scratchpad con. */
-    Con *fs = focused;
-    while (fs && fs->fullscreen_mode == CF_NONE)
-        fs = fs->parent;
-
-    if (fs->type != CT_WORKSPACE) {
-        con_toggle_fullscreen(focused, CF_OUTPUT);
-    }
-
     /* If this was 'scratchpad show' without criteria, we check if the
      * currently focused window is a scratchpad window and should be hidden
      * again. */
@@ -99,6 +95,16 @@ void scratchpad_show(Con *con) {
         return;
     }
 
+    /* If the current con or any of its parents are in fullscreen mode, we
+     * first need to disable it before showing the scratchpad con. */
+    Con *fs = focused;
+    while (fs && fs->fullscreen_mode == CF_NONE)
+        fs = fs->parent;
+
+    if (fs && fs->type != CT_WORKSPACE) {
+        con_toggle_fullscreen(fs, CF_OUTPUT);
+    }
+
     /* If this was 'scratchpad show' without criteria, we check if there is a
      * unfocused scratchpad on the current workspace and focus it */
     Con *walk_con;

testcases/t/206-fullscreen-scratchpad.t

@@ -0,0 +1,94 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+#   Assure that no window is in fullscreen mode after showing a scratchpad window
+# Bug still in: 4.5.1-54-g0f6b5fe
+
+use i3test;
+
+my $tmp = fresh_workspace;
+
+sub fullscreen_windows {
+    my $ws = $tmp;
+    $ws = shift if @_;
+
+    my $nodes = scalar grep { $_->{fullscreen_mode} != 0 } @{get_ws_content($ws)->[0]->{nodes}};
+    my $cons = scalar grep { $_->{fullscreen_mode} != 0 } @{get_ws_content($ws)};
+    return $nodes + $cons;
+}
+
+##########################################################################################
+# map two windows in one container, fullscreen one of them and then move it to scratchpad
+##########################################################################################
+
+my $first_win = open_window;
+my $second_win = open_window;
+
+# fullscreen the focused window
+cmd 'fullscreen';
+
+# see if the window really is in fullscreen mode
+is(fullscreen_windows(), 1, 'amount of fullscreen windows after enabling fullscreen');
+
+# move window to scratchpad
+cmd 'move scratchpad';
+
+###############################################################################
+# show the scratchpad window again; it should not be in fullscreen mode anymore
+###############################################################################
+
+# show window from scratchpad
+cmd 'scratchpad show';
+
+# switch window back to tiling mode
+cmd 'floating toggle';
+
+# see if no window is in fullscreen mode
+is(fullscreen_windows(), 0, 'amount of fullscreen windows after showing previously fullscreened scratchpad window');
+
+########################################################################################
+# move a window to scratchpad, focus parent container, make it fullscreen, focus a child
+########################################################################################
+
+# make layout tabbed
+cmd 'layout tabbed';
+
+# move one window to scratchpad
+cmd 'move scratchpad';
+
+# focus parent
+cmd 'focus parent';
+
+# fullscreen the container
+cmd 'fullscreen';
+
+# focus child
+cmd 'focus child';
+
+# see if the window really is in fullscreen mode
+is(fullscreen_windows(), 1, 'amount of fullscreen windows after enabling fullscreen on parent');
+
+##########################################################################
+# show a scratchpad window; no window should be in fullscreen mode anymore
+##########################################################################
+
+# show the scratchpad window
+cmd 'scratchpad show';
+
+# see if no window is in fullscreen mode
+is(fullscreen_windows(), 0, 'amount of fullscreen windows after showing a scratchpad window while a parent container was in fullscreen mode');
+
+done_testing;