Auto configure mouse settings in more terminals

Tested all the Linux ones in Virtualbox. Yay Virtualbox!

MOUSE.md

@@ -22,6 +22,7 @@ other terminals will send nothing, making scrolling not work.
 ## Text Marking Workarounds in `scroll` Mode
 
 - **Alacritty**: Use use <kbd>shift</kbd> + mouse selection to make it work. Cred to @chrisgrieser for this tip.
+- **Foot**: Use use <kbd>shift</kbd> + mouse selection to make it work. Cred to @postsolar for this tip.
 - **Hyper** on macOS: Set `macOptionSelectionMode: 'force'` in your config file, then hold the Option Key <kbd>⌥</kbd> while marking
 - **iTerm**: Preferences / Profiles / Default / Terminal / uncheck "Report mouse clicks & drags"
 - macOS **Terminal** on a laptop: Hold down the <kbd>fn</kbd> key while marking with the mouse

README.md

@@ -38,6 +38,8 @@ Doing the right thing includes:
 - Renders [terminal
   hyperlinks](https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda)
   properly
+- **Mouse Scrolling** works out of the box (but
+  [look here for tradeoffs](https://github.com/walles/moar/blob/master/MOUSE.md))
 
 [For compatibility reasons](https://github.com/walles/moar/issues/14), `moar`
 uses the formats declared in these environment variables if present:

twin/screen.go

@@ -204,15 +204,11 @@ func (screen *UnixScreen) hideCursor(hide bool) {
 // See also: https://github.com/walles/moar/issues/53
 func terminalHasArrowKeysEmulation() bool {
 	// Untested:
-	// * https://codeberg.org/dnkl/foot
-	// * Konsole
-	// * https://github.com/gnome-terminator/terminator
-	// * https://gnunn1.github.io/tilix-web/
 	// * The Windows terminal
 
 	// Better off with mouse tracking:
-	// * iTerm2
-	// * Terminal.app
+	// * iTerm2 (macOS)
+	// * Terminal.app (macOS)
 
 	// Hyper, tested on macOS, December 14th 2023
 	if os.Getenv("TERM_PROGRAM") == "Hyper" {
@@ -234,6 +230,33 @@ func terminalHasArrowKeysEmulation() bool {
 		return true
 	}
 
+	// GNOME Terminal, tested on Ubuntu 22.04, December 16th 2023
+	if os.Getenv("GNOME_TERMINAL_SCREEN") != "" {
+		return true
+	}
+
+	// Tilix, tested on Ubuntu 22.04, December 16th 2023
+	if os.Getenv("TILIX_ID") != "" {
+		return true
+	}
+
+	// Konsole, tested on Ubuntu 22.04, December 16th 2023
+	if os.Getenv("KONSOLE_VERSION") != "" {
+		return true
+	}
+
+	// Terminator, tested on Ubuntu 22.04, December 16th 2023
+	if os.Getenv("TERMINATOR_UUID") != "" {
+		return true
+	}
+
+	// Foot, tested on Ubuntu 22.04, December 16th 2023
+	if os.Getenv("TERM") == "foot" {
+		// Note that this test isn't very good, somebody could be running Foot
+		// with some other TERM setting. Other suggestions welcome.
+		return true
+	}
+
 	return false
 }