Implement 'resize set <width> ppt <height> ppt' command for tiling windows (#3036)

docs/userguide

@@ -2320,8 +2320,11 @@ space from all the other containers. The optional pixel argument specifies by
 how many pixels a *floating container* should be grown or shrunk (the default
 is 10 pixels). The ppt argument means percentage points and specifies by how
 many percentage points a *tiling container* should be grown or shrunk (the
-default is 10 percentage points). Note that +resize set+ will only work for
+default is 10 percentage points).
-floating containers.
+
+Notes about +resize set+: a value of 0 for <width> or <height> means "do
+not resize in this direction", and resizing a tiling container by +px+ is not
+implemented.
 
 It is recommended to define bindings for resizing in a dedicated binding mode.
 See <<binding_modes>> and the example in the i3

include/commands.h

@@ -63,7 +63,7 @@ void cmd_move_con_to_workspace_name(I3_CMD, const char *name, const char *no_aut
 void cmd_move_con_to_workspace_number(I3_CMD, const char *which, const char *no_auto_back_and_forth);
 
 /**
- * Implementation of 'resize set <px> [px] <px> [px]'.
+ * Implementation of 'resize set <width> [px | ppt] <height> [px | ppt]'.
  *
  */
 void cmd_resize_set(I3_CMD, long cwidth, const char *mode_width, long cheight, const char *mode_height);

src/commands.c

@@ -659,7 +659,7 @@ void cmd_resize(I3_CMD, const char *way, const char *direction, long resize_px,
  */
 void cmd_resize_set(I3_CMD, long cwidth, const char *mode_width, long cheight, const char *mode_height) {
     DLOG("resizing to %ld %s x %ld %s\n", cwidth, mode_width, cheight, mode_height);
-    if (cwidth <= 0 || cheight <= 0) {
+    if (cwidth < 0 || cheight < 0) {
         ELOG("Resize failed: dimensions cannot be negative (was %ld %s x %ld %s)\n", cwidth, mode_width, cheight, mode_height);
         return;
     }
@@ -667,25 +667,84 @@ void cmd_resize_set(I3_CMD, long cwidth, const char *mode_width, long cheight, c
     HANDLE_EMPTY_MATCH;
 
     owindow *current;
+    bool success = true;
     TAILQ_FOREACH(current, &owindows, owindows) {
         Con *floating_con;
         if ((floating_con = con_inside_floating(current->con))) {
             Con *output = con_get_output(floating_con);
-            if (mode_width && strcmp(mode_width, "ppt") == 0) {
+            if (cwidth == 0) {
+                cwidth = output->rect.width;
+            } else if (mode_width && strcmp(mode_width, "ppt") == 0) {
                 cwidth = output->rect.width * ((double)cwidth / 100.0);
             }
-            if (mode_height && strcmp(mode_height, "ppt") == 0) {
+            if (cheight == 0) {
+                cheight = output->rect.height;
+            } else if (mode_height && strcmp(mode_height, "ppt") == 0) {
                 cheight = output->rect.height * ((double)cheight / 100.0);
             }
             floating_resize(floating_con, cwidth, cheight);
         } else {
-            ELOG("Resize failed: %p not a floating container\n", current->con);
+            if (current->con->window && current->con->window->dock) {
+                DLOG("This is a dock window. Not resizing (con = %p)\n)", current->con);
+                continue;
+            }
+
+            if (cwidth > 0 && mode_width && strcmp(mode_width, "ppt") == 0) {
+                /* get the appropriate current container (skip stacked/tabbed cons) */
+                Con *target = current->con;
+                Con *dummy;
+                resize_find_tiling_participants(&target, &dummy, D_LEFT, true);
+
+                /* Calculate new size for the target container */
+                double current_percent = target->percent;
+                char *action_string;
+                long adjustment;
+
+                if (current_percent > cwidth) {
+                    action_string = "shrink";
+                    adjustment = (int)(current_percent * 100) - cwidth;
+                } else {
+                    action_string = "grow";
+                    adjustment = cwidth - (int)(current_percent * 100);
+                }
+
+                /* perform resizing and report failure if not possible */
+                if (!cmd_resize_tiling_width_height(current_match, cmd_output,
+                                                    target, action_string, "width", adjustment)) {
+                    success = false;
+                }
+            }
+
+            if (cheight > 0 && mode_width && strcmp(mode_width, "ppt") == 0) {
+                /* get the appropriate current container (skip stacked/tabbed cons) */
+                Con *target = current->con;
+                Con *dummy;
+                resize_find_tiling_participants(&target, &dummy, D_DOWN, true);
+
+                /* Calculate new size for the target container */
+                double current_percent = target->percent;
+                char *action_string;
+                long adjustment;
+
+                if (current_percent > cheight) {
+                    action_string = "shrink";
+                    adjustment = (int)(current_percent * 100) - cheight;
+                } else {
+                    action_string = "grow";
+                    adjustment = cheight - (int)(current_percent * 100);
+                }
+
+                /* perform resizing and report failure if not possible */
+                if (!cmd_resize_tiling_width_height(current_match, cmd_output,
+                                                    target, action_string, "height", adjustment)) {
+                    success = false;
+                }
+            }
         }
     }
 
     cmd_output->needs_tree_render = true;
-    // XXX: default reply for now, make this a better reply
+    ysuccess(success);
-    ysuccess(true);
 }
 
 /*

testcases/t/541-resize-set-tiling.t

@@ -0,0 +1,147 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • https://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • https://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • https://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)
+#
+# Tests resizing tiling containers
+use i3test;
+
+############################################################
+# resize horizontally
+############################################################
+
+my $tmp = fresh_workspace;
+
+cmd 'split h';
+
+my $left = open_window;
+my $right = open_window;
+
+diag("left = " . $left->id . ", right = " . $right->id);
+
+is($x->input_focus, $right->id, 'Right window focused');
+
+cmd 'resize set 75 ppt 0 ppt';
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+cmp_float($nodes->[0]->{percent}, 0.25, 'left window got only 25%');
+cmp_float($nodes->[1]->{percent}, 0.75, 'right window got 75%');
+
+############################################################
+# resize vertically
+############################################################
+
+my $tmp = fresh_workspace;
+
+cmd 'split v';
+
+my $top = open_window;
+my $bottom = open_window;
+
+diag("top = " . $top->id . ", bottom = " . $bottom->id);
+
+is($x->input_focus, $bottom->id, 'Bottom window focused');
+
+cmd 'resize set 0 ppt 75 ppt';
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+cmp_float($nodes->[0]->{percent}, 0.25, 'top window got only 25%');
+cmp_float($nodes->[1]->{percent}, 0.75, 'bottom window got 75%');
+
+
+############################################################
+# resize horizontally and vertically
+############################################################
+
+my $tmp = fresh_workspace;
+
+cmd 'split h';
+my $left = open_window;
+my $top_right = open_window;
+cmd 'split v';
+my $bottom_right = open_window;
+
+diag("left = " . $left->id . ", top-right = " . $top_right->id . ", bottom-right = " . $bottom_right->id);
+
+is($x->input_focus, $bottom_right->id, 'Bottom-right window focused');
+
+cmd 'resize set 75 ppt 75 ppt';
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+cmp_float($nodes->[0]->{percent}, 0.25, 'left container got 25%');
+cmp_float($nodes->[1]->{percent}, 0.75, 'right container got 75%');
+cmp_float($nodes->[1]->{nodes}->[0]->{percent}, 0.25, 'top-right window got 25%');
+cmp_float($nodes->[1]->{nodes}->[1]->{percent}, 0.75, 'bottom-right window got 75%');
+
+
+############################################################
+# resize from inside a tabbed container
+############################################################
+
+my $tmp = fresh_workspace;
+
+cmd 'split h';
+
+my $left = open_window;
+my $right1 = open_window;
+
+cmd 'split h';
+cmd 'layout tabbed';
+
+my $right2 = open_window;
+
+diag("left = " . $left->id . ", right1 = " . $right1->id . ", right2 = " . $right2->id);
+
+is($x->input_focus, $right2->id, '2nd right window focused');
+
+cmd 'resize set 75 ppt 0 ppt';
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+cmp_float($nodes->[0]->{percent}, 0.25, 'left container got 25%');
+cmp_float($nodes->[1]->{percent}, 0.75, 'right container got 75%');
+
+
+############################################################
+# resize from inside a stacked container
+############################################################
+
+my $tmp = fresh_workspace;
+
+cmd 'split h';
+
+my $left = open_window;
+my $right1 = open_window;
+
+cmd 'split h';
+cmd 'layout stacked';
+
+my $right2 = open_window;
+
+diag("left = " . $left->id . ", right1 = " . $right1->id . ", right2 = " . $right2->id);
+
+is($x->input_focus, $right2->id, '2nd right window focused');
+
+cmd 'resize set 75 ppt 0 ppt';
+
+my ($nodes, $focus) = get_ws_content($tmp);
+
+cmp_float($nodes->[0]->{percent}, 0.25, 'left container got 25%');
+cmp_float($nodes->[1]->{percent}, 0.75, 'right container got 75%');
+
+
+done_testing;