koreader Dispatcher: fix action deleted arg

Font file or user style tweak can be deleted (outside of the program) after assigning an action with them as arg. Fix displaying the action in Gesture manager / Profiles. Check for font/tweak existence before executing. Closes https://github.com/koreader/koreader/issues/13479.

This change is

Mar 30 '25 07:03 hius07

@poire-z minor nits in tweak id - a space at the end. Fixing will break users' settings. https://github.com/koreader/koreader/blob/2a10f7188ba4c6b7073d5201e3c26f78dfcaf40f/frontend/ui/data/css_tweaks.lua#L100 https://github.com/koreader/koreader/blob/2a10f7188ba4c6b7073d5201e3c26f78dfcaf40f/frontend/ui/data/css_tweaks.lua#L107 https://github.com/koreader/koreader/blob/2a10f7188ba4c6b7073d5201e3c26f78dfcaf40f/frontend/ui/data/css_tweaks.lua#L113

Mar 30 '25 08:03 hius07

Oh, sorry for that :/ What would happen if we fix these, and users have them with spaces ? Crash or just not effect ? (These must be quite rarely used/enabled, and it will probably noticed if they were needed but have no longer effect.)

Mar 30 '25 08:03 poire-z

With this PR, just no effect.

Mar 30 '25 09:03 hius07

@poire-z minor nits in tweak id - a space at the end. Fixing will break users' settings.

https://github.com/koreader/koreader/blob/2a10f7188ba4c6b7073d5201e3c26f78dfcaf40f/frontend/ui/data/css_tweaks.lua#L100

https://github.com/koreader/koreader/blob/2a10f7188ba4c6b7073d5201e3c26f78dfcaf40f/frontend/ui/data/css_tweaks.lua#L107

https://github.com/koreader/koreader/blob/2a10f7188ba4c6b7073d5201e3c26f78dfcaf40f/frontend/ui/data/css_tweaks.lua#L113

Can’t one-time migration help?

Mar 31 '25 03:03 mergen3107