[gtk: 1/2] popover: Correctly substract arrow height when measuring popover widget

[Matthias Clasen <matthiasc src gnome org>]

commit 50a8cbc0da3118640cf0525d30f94c54e68b73d2
Author: Yubao Liu <yubao liu gmail com>
Date:   Sun Jul 17 00:12:39 2022 +0800

    popover: Correctly substract arrow height when measuring popover widget
    
    For default popover arrow position and default height-for-width layout mode,
    natural_width is calculated first with for_size=-1 and orientation=HORIZONTAL,
    at the end of gtk_popover_measure() natural_width  won't be added with tail_height.
    
    Then to measure with for_size=natural_width and orientation=VERTICAL, obviously
    for_size shouldn't be substract with tail_height.
    
    The wrong logic will force content in popover gets less width and then text labels
    in popover may get wrapped unnecessarily.

 gtk/gtkpopover.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index d6f976daa7..8ac30372b7 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -1451,7 +1451,7 @@ gtk_popover_measure (GtkWidget      *widget,
   GtkCssStyle *style;
   GtkBorder shadow_width;
 
-  if (for_size >= 0)
+  if (for_size >= 0 && (POS_IS_VERTICAL (priv->position) == (orientation == GTK_ORIENTATION_HORIZONTAL)))
     for_size -= tail_height;
 
   style = gtk_css_node_get_style (gtk_widget_get_css_node (GTK_WIDGET (priv->contents_widget)));