Each call to table_attach() in fact open-codes (row, row + 1), for setting
the top and bottom grid lines of the widget being added to the table.
What's more, within a given table, we add widgets in a left-to-right
first, top-down second fashion, so "row" only ever increases within a
particular table.

Modify the table_attach() macro to calculate "bottom" automatically, plus
replace the open-coded "row" constants with actual (incremented) "row"
variables.

(This patch is easiest to review with "git show --word-diff=color".)

Don't do the same simplification for columns, as we're going to introduce
a multi-column widget next.

Note that one definition of table_attach() now evaluates "top" twice.
Preventing that would be a mess: we could be tempted to introduce a do {
... } while (0) block with a block-scope auto-storage variable. However,
it could trigger gcc warnings (about shadowing other variables), in which
case we'd end up copying NBDKIT_UNIQUE_NAME() from nbdkit, which is
totally overkill. So just evaluate "top" twice; it's not a complex or very
widely used macro. (BTW, the previous replacement text of the *other*
definition of table_attach() used to evaluate "top" twice as well.)

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1590721
Signed-off-by: Laszlo Ersek <ler...@redhat.com>
Reviewed-by: Richard W.M. Jones <rjo...@redhat.com>
---

Notes:
    v2:
    
    - s/colums/columns/ in the commit message [Rich]
    
    - pick up Rich's R-b

 gui-gtk3-compat.h |  8 +--
 gui.c             | 69 ++++++++++++--------
 2 files changed, 46 insertions(+), 31 deletions(-)

diff --git a/gui-gtk3-compat.h b/gui-gtk3-compat.h
index 5388c3a3530c..e26506469eea 100644
--- a/gui-gtk3-compat.h
+++ b/gui-gtk3-compat.h
@@ -63,7 +63,7 @@ typedef enum
  */
 #define table_new(grid, rows, columns)          \
   (grid) = gtk_grid_new ()
-#define table_attach(grid, child, left, right, top, bottom, xoptions, 
yoptions, xpadding, ypadding) \
+#define table_attach(grid, child, left, right, top, xoptions, yoptions, 
xpadding, ypadding) \
   do {                                                                  \
     if (((xoptions) & GTK_EXPAND) != 0)                                 \
       gtk_widget_set_hexpand ((child), TRUE);                           \
@@ -75,14 +75,14 @@ typedef enum
       gtk_widget_set_valign ((child), GTK_ALIGN_FILL);                  \
     set_padding ((child), (xpadding), (ypadding));                      \
     gtk_grid_attach (GTK_GRID (grid), (child),                          \
-                     (left), (top), (right)-(left), (bottom)-(top));    \
+                     (left), (top), (right)-(left), 1);    \
   } while (0)
 #else
 #define table_new(table, rows, columns)                 \
   (table) = gtk_table_new ((rows), (columns), FALSE)
-#define table_attach(table, child, left, right,top, bottom, xoptions, 
yoptions, xpadding, ypadding) \
+#define table_attach(table, child, left, right,top, xoptions, yoptions, 
xpadding, ypadding) \
   gtk_table_attach (GTK_TABLE (table), (child),                         \
-                    (left), (right), (top), (bottom),                   \
+                    (left), (right), (top), (top + 1),                   \
                     (xoptions), (yoptions), (xpadding), (ypadding))
 #endif
 
diff --git a/gui.c b/gui.c
index b4a9fed18410..eeb15a096351 100644
--- a/gui.c
+++ b/gui.c
@@ -210,6 +210,7 @@ create_connection_dialog (struct config *config)
   GtkWidget *configure_network;
   GtkWidget *xterm;
   char port_str[64];
+  int row;
 
   conn_dlg = gtk_dialog_new ();
   gtk_window_set_title (GTK_WINDOW (conn_dlg), g_get_prgname ());
@@ -221,9 +222,10 @@ create_connection_dialog (struct config *config)
   set_padding (intro, 10, 10);
 
   table_new (table, 5, 2);
+  row = 0;
   server_label = gtk_label_new_with_mnemonic (_("Conversion _server:"));
   table_attach (table, server_label,
-                0, 1, 0, 1, GTK_FILL, GTK_FILL, 4, 4);
+                0, 1, row, GTK_FILL, GTK_FILL, 4, 4);
   set_alignment (server_label, 1., 0.5);
 
   hbox_new (server_hbox, FALSE, 4);
@@ -240,11 +242,12 @@ create_connection_dialog (struct config *config)
   gtk_box_pack_start (GTK_BOX (server_hbox), port_colon_label, FALSE, FALSE, 
0);
   gtk_box_pack_start (GTK_BOX (server_hbox), port_entry, FALSE, FALSE, 0);
   table_attach (table, server_hbox,
-                1, 2, 0, 1, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
+                1, 2, row, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
 
+  row++;
   username_label = gtk_label_new_with_mnemonic (_("_User name:"));
   table_attach (table, username_label,
-                0, 1, 1, 2, GTK_FILL, GTK_FILL, 4, 4);
+                0, 1, row, GTK_FILL, GTK_FILL, 4, 4);
   set_alignment (username_label, 1., 0.5);
   username_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (username_label), username_entry);
@@ -253,11 +256,12 @@ create_connection_dialog (struct config *config)
   else
     gtk_entry_set_text (GTK_ENTRY (username_entry), "root");
   table_attach (table, username_entry,
-                1, 2, 1, 2, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
+                1, 2, row, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
 
+  row++;
   password_label = gtk_label_new_with_mnemonic (_("_Password:"));
   table_attach (table, password_label,
-                0, 1, 2, 3, GTK_FILL, GTK_FILL, 4, 4);
+                0, 1, row, GTK_FILL, GTK_FILL, 4, 4);
   set_alignment (password_label, 1., 0.5);
   password_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (password_label), password_entry);
@@ -269,25 +273,27 @@ create_connection_dialog (struct config *config)
   if (config->auth.password != NULL)
     gtk_entry_set_text (GTK_ENTRY (password_entry), config->auth.password);
   table_attach (table, password_entry,
-                1, 2, 2, 3, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
+                1, 2, row, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
 
+  row++;
   identity_label = gtk_label_new_with_mnemonic (_("SSH _Identity URL:"));
   table_attach (table, identity_label,
-                0, 1, 3, 4, GTK_FILL, GTK_FILL, 4, 4);
+                0, 1, row, GTK_FILL, GTK_FILL, 4, 4);
   set_alignment (identity_label, 1., 0.5);
   identity_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (identity_label), identity_entry);
   if (config->auth.identity.url != NULL)
     gtk_entry_set_text (GTK_ENTRY (identity_entry), config->auth.identity.url);
   table_attach (table, identity_entry,
-                1, 2, 3, 4, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
+                1, 2, row, GTK_EXPAND|GTK_FILL, GTK_FILL, 4, 4);
 
+  row++;
   sudo_button =
     gtk_check_button_new_with_mnemonic (_("Use su_do when running virt-v2v"));
   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (sudo_button),
                                 config->auth.sudo);
   table_attach (table, sudo_button,
-                1, 2, 4, 5, GTK_FILL, GTK_FILL, 4, 4);
+                1, 2, row, GTK_FILL, GTK_FILL, 4, 4);
 
   hbox_new (test_hbox, FALSE, 0);
   test = gtk_button_new_with_mnemonic (_("_Test connection"));
@@ -729,6 +735,7 @@ create_conversion_dialog (struct config *config)
   GtkWidget *interfaces_frame, *interfaces_sw;
   char vcpus_str[64];
   char memory_str[64];
+  int row;
 
   conv_dlg = gtk_dialog_new ();
   gtk_window_set_title (GTK_WINDOW (conv_dlg), g_get_prgname ());
@@ -750,35 +757,38 @@ create_conversion_dialog (struct config *config)
   vbox_new (target_vbox, FALSE, 1);
 
   table_new (target_tbl, 3, 3);
+  row = 0;
   guestname_label = gtk_label_new_with_mnemonic (_("_Name:"));
   table_attach (target_tbl, guestname_label,
-                0, 1, 0, 1, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (guestname_label, 1., 0.5);
   guestname_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (guestname_label), guestname_entry);
   if (config->guestname != NULL)
     gtk_entry_set_text (GTK_ENTRY (guestname_entry), config->guestname);
   table_attach (target_tbl, guestname_entry,
-                1, 2, 0, 1, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
 
+  row++;
   vcpus_label = gtk_label_new_with_mnemonic (_("# _vCPUs:"));
   table_attach (target_tbl, vcpus_label,
-                0, 1, 1, 2, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (vcpus_label, 1., 0.5);
   vcpus_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (vcpus_label), vcpus_entry);
   snprintf (vcpus_str, sizeof vcpus_str, "%d", config->vcpu.cores);
   gtk_entry_set_text (GTK_ENTRY (vcpus_entry), vcpus_str);
   table_attach (target_tbl, vcpus_entry,
-                1, 2, 1, 2, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
   vcpus_warning = gtk_image_new_from_stock (GTK_STOCK_DIALOG_WARNING,
                                             GTK_ICON_SIZE_BUTTON);
   table_attach (target_tbl, vcpus_warning,
-                2, 3, 1, 2, 0, 0, 1, 1);
+                2, 3, row, 0, 0, 1, 1);
 
+  row++;
   memory_label = gtk_label_new_with_mnemonic (_("_Memory (MB):"));
   table_attach (target_tbl, memory_label,
-                0, 1, 2, 3, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (memory_label, 1., 0.5);
   memory_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (memory_label), memory_entry);
@@ -786,11 +796,11 @@ create_conversion_dialog (struct config *config)
             config->memory / 1024 / 1024);
   gtk_entry_set_text (GTK_ENTRY (memory_entry), memory_str);
   table_attach (target_tbl, memory_entry,
-                1, 2, 2, 3, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
   memory_warning = gtk_image_new_from_stock (GTK_STOCK_DIALOG_WARNING,
                                              GTK_ICON_SIZE_BUTTON);
   table_attach (target_tbl, memory_warning,
-                2, 3, 2, 3, 0, 0, 1, 1);
+                2, 3, row, 0, 0, 1, 1);
 
   gtk_box_pack_start (GTK_BOX (target_vbox), target_tbl, TRUE, TRUE, 0);
 
@@ -809,20 +819,22 @@ create_conversion_dialog (struct config *config)
   vbox_new (output_vbox, FALSE, 1);
 
   table_new (output_tbl, 5, 2);
+  row = 0;
   o_label = gtk_label_new_with_mnemonic (_("Output _to (-o):"));
   table_attach (output_tbl, o_label,
-                0, 1, 0, 1, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (o_label, 1., 0.5);
   o_combo = gtk_combo_box_text_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (o_label), o_combo);
   gtk_widget_set_tooltip_markup (o_combo, _("<b>libvirt</b> means send the 
converted guest to libvirt-managed KVM on the conversion server.  <b>local</b> 
means put it in a directory on the conversion server.  <b>rhv</b> means write 
it to RHV-M/oVirt.  <b>glance</b> means write it to OpenStack Glance.  See the 
virt-v2v(1) manual page for more information about output options."));
   repopulate_output_combo (config);
   table_attach (output_tbl, o_combo,
-                1, 2, 0, 1, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
 
+  row++;
   oc_label = gtk_label_new_with_mnemonic (_("_Output conn. (-oc):"));
   table_attach (output_tbl, oc_label,
-                0, 1, 1, 2, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (oc_label, 1., 0.5);
   oc_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (oc_label), oc_entry);
@@ -830,11 +842,12 @@ create_conversion_dialog (struct config *config)
   if (config->output.connection != NULL)
     gtk_entry_set_text (GTK_ENTRY (oc_entry), config->output.connection);
   table_attach (output_tbl, oc_entry,
-                1, 2, 1, 2, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
 
+  row++;
   os_label = gtk_label_new_with_mnemonic (_("Output _storage (-os):"));
   table_attach (output_tbl, os_label,
-                0, 1, 2, 3, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (os_label, 1., 0.5);
   os_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (os_label), os_entry);
@@ -842,11 +855,12 @@ create_conversion_dialog (struct config *config)
   if (config->output.storage != NULL)
     gtk_entry_set_text (GTK_ENTRY (os_entry), config->output.storage);
   table_attach (output_tbl, os_entry,
-                1, 2, 2, 3, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
 
+  row++;
   of_label = gtk_label_new_with_mnemonic (_("Output _format (-of):"));
   table_attach (output_tbl, of_label,
-                0, 1, 3, 4, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (of_label, 1., 0.5);
   of_entry = gtk_entry_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (of_label), of_entry);
@@ -854,11 +868,12 @@ create_conversion_dialog (struct config *config)
   if (config->output.format != NULL)
     gtk_entry_set_text (GTK_ENTRY (of_entry), config->output.format);
   table_attach (output_tbl, of_entry,
-                1, 2, 3, 4, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
 
+  row++;
   oa_label = gtk_label_new_with_mnemonic (_("Output _allocation (-oa):"));
   table_attach (output_tbl, oa_label,
-                0, 1, 4, 5, GTK_FILL, GTK_FILL, 1, 1);
+                0, 1, row, GTK_FILL, GTK_FILL, 1, 1);
   set_alignment (oa_label, 1., 0.5);
   oa_combo = gtk_combo_box_text_new ();
   gtk_label_set_mnemonic_widget (GTK_LABEL (oa_label), oa_combo);
@@ -875,7 +890,7 @@ create_conversion_dialog (struct config *config)
     break;
   }
   table_attach (output_tbl, oa_combo,
-                1, 2, 4, 5, GTK_FILL, GTK_FILL, 1, 1);
+                1, 2, row, GTK_FILL, GTK_FILL, 1, 1);
 
   gtk_box_pack_start (GTK_BOX (output_vbox), output_tbl, TRUE, TRUE, 0);
   gtk_container_add (GTK_CONTAINER (output_frame), output_vbox);

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