Animated gifs paste incorrectly in certain apps

[MrDrMcCoy]

Description

When triggering an image match of an animated gif, the receiving application will sometimes get something else instead. This appears to depend on the app that receives it.

Apps with successful gif paste:

• Slack (Flatpak)
• Google Docs (Firefox native, Vivaldi Flatpak)

Apps that just get a static png:

• Discord (standalone Flatpak, Vivaldi Flatpak)
• Signal (Flatpak)

Apps that get whatever was last in the clipboard:

• Thunderbird (native)

Steps to reproduce

1. Create image match
2. Type trigger in text area of designated app

Expected behavior

All apps should get the full animated gif if they support pasting gifs.

Screenshots

No response

Logs

This is logged on every expansion, whether successful or not:

21:46:13 [worker(221777)] [ERROR] modulo reported an error: 
(espanso:235504): Gdk-WARNING **: 21:46:10.779: Failed to read portal settings: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Portal operation not allowed: Unable to open /proc/235504/root

Your environment

• Public source code: yes?
• Environment name and version (e.g., Rust 1.59.0): KDE 6.0.4 (Wayland)
• Operating system and version (e.g., Ubuntu 20.04.2 LTS): Ubuntu 22.04
• Espanso version (e.g., 2.1.4-beta): espanso 2.2.1 (Wayland)

Self-service

• I'd be willing to fix this bug myself.

[smeech]

Yes, it's very variable:

Success:

• Google Docs - Firefox
• Thunderbird

Fail despite manually pasted image working:

• Google Docs - Brave
• Discord (Flatpak)

Not sure how much is due to Espanso, and how much is due to the receiving programs.

I've not experimented with the alternative image methods - you might like to have a look at https://pastebin.com/MkCYM5Jq.

Linux Mint 21.2 x86_64 Xfce 4.18