[gnome-boxes/take-manual-input-for-memory-widget: 2/2] memory-row: Handle user manual input of memory values

[Felipe Borges <felipeborges src gnome org>]

commit c5be977075506dba7aca5def2c29ea188fa2a0ff
Author: Felipe Borges <felipeborges gnome org>
Date:   Tue Mar 1 13:15:35 2022 +0100

    memory-row: Handle user manual input of memory values
    
    Fixes #766

 src/preferences/memory-row.vala | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)
---
diff --git a/src/preferences/memory-row.vala b/src/preferences/memory-row.vala
index 9e568df5..92f5d4b2 100644
--- a/src/preferences/memory-row.vala
+++ b/src/preferences/memory-row.vala
@@ -12,16 +12,18 @@
     [GtkCallback]
     private int on_spin_button_input (Gtk.SpinButton spin_button, out double new_value) {
         uint64 current_value = (uint64)spin_button.get_value ();
-
-        /* FIXME: we should be getting the value with spin_button.get_text () so we can
-         * accept user manual input. This will require to parse the text properly and
-         * convert strings such as 2.0 GiB into 2.0 * Osinfo.MEBIBYTE * 1024.
-         *
-         * As it is now, we don't support manual input, and the value can only be changed
-         * by using the + and - buttons of the GtkSpinButton.
-        */
         new_value = current_value;
 
+        string? text = spin_button.get_text ();
+        if (text == null)
+            return 1;
+
+        double user_input_value = double.parse (text);
+        if (user_input_value == 0)
+            return 1;
+
+        new_value = user_input_value * Osinfo.GIBIBYTES;
+
         return 1;
     }