IsSpellUsable() and Swiftmend spell

[Basil2]

IsSpellUsable() for Swiftmend always return false unless you have a unit with hots in your target.

However, WoW UI is more adequate. If you have a macro "/cast [@player] Swiftmend", the macro's spell icon is showed as available when hots are on player (not on target).

So is there any chance to have such behavior with IsSpellUsable()?

[SDPhantom]

Macros and IsUsableSpell() have very different mechanics behind them. ActionButtons (and by extension macros) are handled by C code. We don't get access to those methods.

IsUsableSpell() has very basic capability, like "Can I afford the resource cost?", "Did I just dodge/parry?", etc. It doesn't have the capability to check what buffs/debuffs the target has.

[Kanegasi]

You can use SecureCmdOptionParse to evaluate macro conditions for use in an addon.

In your case, you would use local action, target = SecureCmdOptionParse("[@player] Swiftmend") which should return the strings "Swiftmend" and "player" if valid, and both nil if not valid.

[SDPhantom]

It still doesn't do any buff checking like the OP was asking for. It just checks whether the macro conditions are true and returns the option and target it finds. [@player] always evaluates to true, so it'll always return the spell name and "player" regardless of anything else.

[Basil2]

Thank you for help, I'll try SecureCmdOptionParse.

[Basil2]

Originally Posted by SDPhantom IsUsableSpell() has very basic capability, like "Can I afford the resource cost?", "Did I just dodge/parry?", etc. It doesn't have the capability to check what buffs/debuffs the target has.

Actually, IsUsableSpell() does check for buffs. But do it for target only.

[Basil2]

Originally Posted by Kanegasi You can use SecureCmdOptionParse to evaluate macro conditions for use in an addon.

I have tried. It looks like that SecureCmdOptionParse() makes parsing only. It doesn't check spell conditions - just extracts spell name and spell destination.