m_property: add `>` for fixed precision floating-point expansion

This enhancement makes it easier to create constant width property
expansions, useful for the `--term-status-msg`. Additionally, it changes
to `%f` printing with manual zero trimming, which is easier to control
than `%g`. With this method, we can directly specify precision, not just
significant numbers. This approach also avoids overly high precision for
values less than 1, which is not necessary for a generic floating-point
print function.

A new print helper function is added, which can be used with adjusted
precision for specific cases where a different default is needed. This
also unifies the code slightly.

1 files changed, 6 insertions, 0 deletions

diff --git a/options/m_property.h b/options/m_property.h
index 0dce24600c..9fa01e0ccc 100644
--- a/options/m_property.h
+++ b/options/m_property.h
@@ -48,6 +48,12 @@ enum mp_property_action {
     //  arg: char**
     M_PROPERTY_PRINT,
 
+    // Get human readable fixed length string representing the current value.
+    // If unimplemented, the property wrapper uses the property type as
+    // fallback.
+    //  arg: char**
+    M_PROPERTY_FIXED_LEN_PRINT,
+
     // Like M_PROPERTY_GET_TYPE, but get a type that is compatible to the real
     // type, but reflect practical limits, such as runtime-available values.
     // This is mostly used for "UI" related things.