Want a Matrix client that uses Vim keybindings (#1)

src/keybindings.rs

@@ -0,0 +1,62 @@
+use modalkit::{
+    editing::action::WindowAction,
+    editing::base::WordStyle,
+    env::vim::keybindings::{InputStep, VimBindings},
+    env::vim::VimMode,
+    input::bindings::{EdgeEvent, EdgeRepeat, InputBindings},
+    input::key::TerminalKey,
+};
+
+use crate::base::{IambAction, Keybindings};
+
+/// Find the boundaries for a Matrix username, room alias, or room ID.
+///
+/// Technically "[" and "]" should be here since IPv6 addresses are allowed
+/// in the server name, but in practice that should be uncommon, and people
+/// can just use `gf` and friends in Visual mode instead.
+fn is_mxid_char(c: char) -> bool {
+    return c >= 'a' && c <= 'z' ||
+        c >= 'A' && c <= 'Z' ||
+        c >= '0' && c <= '9' ||
+        ":-./@_#!".contains(c);
+}
+
+pub fn setup_keybindings() -> Keybindings {
+    let mut ism = Keybindings::empty();
+
+    let vim = VimBindings::default()
+        .submit_on_enter()
+        .cursor_open(WordStyle::CharSet(is_mxid_char));
+
+    vim.setup(&mut ism);
+
+    let ctrl_w = EdgeEvent::Key("<C-W>".parse::<TerminalKey>().unwrap());
+    let ctrl_m = EdgeEvent::Key("<C-M>".parse::<TerminalKey>().unwrap());
+    let ctrl_z = EdgeEvent::Key("<C-Z>".parse::<TerminalKey>().unwrap());
+    let key_m_lc = EdgeEvent::Key("m".parse::<TerminalKey>().unwrap());
+    let key_z_lc = EdgeEvent::Key("z".parse::<TerminalKey>().unwrap());
+
+    let cwz = vec![
+        (EdgeRepeat::Once, ctrl_w.clone()),
+        (EdgeRepeat::Once, key_z_lc),
+    ];
+    let cwcz = vec![
+        (EdgeRepeat::Once, ctrl_w.clone()),
+        (EdgeRepeat::Once, ctrl_z),
+    ];
+    let zoom = InputStep::new().actions(vec![WindowAction::ZoomToggle.into()]);
+
+    ism.add_mapping(VimMode::Normal, &cwz, &zoom);
+    ism.add_mapping(VimMode::Normal, &cwcz, &zoom);
+
+    let cwm = vec![
+        (EdgeRepeat::Once, ctrl_w.clone()),
+        (EdgeRepeat::Once, key_m_lc),
+    ];
+    let cwcm = vec![(EdgeRepeat::Once, ctrl_w), (EdgeRepeat::Once, ctrl_m)];
+    let stoggle = InputStep::new().actions(vec![IambAction::ToggleScrollbackFocus.into()]);
+    ism.add_mapping(VimMode::Normal, &cwm, &stoggle);
+    ism.add_mapping(VimMode::Normal, &cwcm, &stoggle);
+
+    return ism;
+}