feat(search): introduce keymap-dependent vim-mode (#1570)

* feat(search): introduce keymap-dependent vim-mode

* fix(zsh): provide widgets with specific keymaps

* fix(settings): unify "vim" and "keymap_mode"

2 files changed, 35 insertions, 4 deletions

diff --git a/atuin-client/config.toml b/atuin-client/config.toml
index 29581d1f..24366b60 100644
--- a/atuin-client/config.toml
+++ b/atuin-client/config.toml
@@ -126,8 +126,13 @@
 enter_accept = true
 
 
-## Defaults to false. If enabled you may use 'j' and 'k' to navigate the history list and 'i' to enter Insert mode.
-# vim = false
+## Defaults to "emacs".  This specifies the keymap on the startup of `atuin
+## search`.  If this is set to "auto", the startup keymap mode in the Atuin
+## search is automatically selected based on the shell's keymap where the
+## keybinding is defined.  If this is set to "emacs", "vim-insert", or
+## "vim-normal", the startup keymap mode in the Atuin search is forced to be
+## the specified one.
+# keymap_mode = "auto"
 
 #[stats]
 # Set commands where we should consider the subcommand for statistics. Eg, kubectl get vs just kubectl
diff --git a/atuin-client/src/settings.rs b/atuin-client/src/settings.rs
index ea01961c..36bbd826 100644
--- a/atuin-client/src/settings.rs
+++ b/atuin-client/src/settings.rs
@@ -143,6 +143,32 @@ pub enum WordJumpMode {
     Subl,
 }
 
+#[derive(Clone, Debug, Deserialize, Copy, PartialEq, Eq, ValueEnum)]
+pub enum KeymapMode {
+    #[serde(rename = "emacs")]
+    Emacs,
+
+    #[serde(rename = "vim-normal")]
+    VimNormal,
+
+    #[serde(rename = "vim-insert")]
+    VimInsert,
+
+    #[serde(rename = "auto")]
+    Auto,
+}
+
+impl KeymapMode {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            KeymapMode::Emacs => "EMACS",
+            KeymapMode::VimNormal => "VIMNORMAL",
+            KeymapMode::VimInsert => "VIMINSERT",
+            KeymapMode::Auto => "AUTO",
+        }
+    }
+}
+
 #[derive(Clone, Debug, Deserialize)]
 pub struct Stats {
     #[serde(default = "Stats::common_prefix_default")]
@@ -201,7 +227,7 @@ pub struct Settings {
     pub max_preview_height: u16,
     pub show_help: bool,
     pub exit_mode: ExitMode,
-    pub vim: bool,
+    pub keymap_mode: KeymapMode,
     pub word_jump_mode: WordJumpMode,
     pub word_chars: String,
     pub scroll_context_lines: usize,
@@ -437,7 +463,7 @@ impl Settings {
             // New users will get the new default, that is more similar to what they are used to.
             .set_default("enter_accept", false)?
             .set_default("sync.records", false)?
-            .set_default("vim", false)?
+            .set_default("keymap_mode", "emacs")?
             .add_source(
                 Environment::with_prefix("atuin")
                     .prefix_separator("_")