Remove "remaps:"

Remaps has been removed to simplify key bindings. With Lua, it's now
possible to remap using basic assignments.

For e.g.

```Lua
xplr.config.modes.builtin.default.key_bindings.on_key["v"] = xplr.config.modes.builtin.default.key_bindings.on_key.space
```

Help menu will auto detect remapped keys and display after removing the
redundant mappings.

Ref: https://github.com/sayanarijit/xplr/discussions/183#discussioncomment-774159

src/app.rs

@@ -1421,7 +1421,7 @@ impl std::fmt::Display for Log {
 
 #[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize)]
 pub enum HelpMenuLine {
-    KeyMap(String, String),
+    KeyMap(String, Vec<String>, String),
     Paragraph(String),
 }
 
@@ -2624,16 +2624,8 @@ impl App {
                 .iter()
                 .map(|l| match l {
                     HelpMenuLine::Paragraph(p) => format!("\t{}\n", p),
-                    HelpMenuLine::KeyMap(k, h) => {
-                        let remaps = self
-                            .mode()
-                            .key_bindings()
-                            .remaps()
-                            .iter()
-                            .filter(|(_, maybeto)| maybeto.as_ref().map(|to| to == k).unwrap_or(false))
-                            .map(|(f, _)| f.clone())
-                            .collect::<Vec<String>>()
-                            .join(", ");
+                    HelpMenuLine::KeyMap(k, remaps, h) => {
+                        let remaps = remaps.join(", ");
                         format!(" {:15} | {:25} | {}\n", k, remaps, h)
                     }
                 })

src/config.rs

@@ -7,11 +7,11 @@ use crate::ui::Border;
 use crate::ui::Constraint;
 use crate::ui::Layout;
 use crate::ui::Style;
-use indexmap::IndexMap;
 use indexmap::IndexSet;
 use serde::{Deserialize, Serialize};
 use std::collections::BTreeMap;
 use std::collections::HashMap;
+use std::collections::HashSet;
 
 #[derive(Debug, Clone, PartialEq, Default, Serialize, Deserialize)]
 #[serde(deny_unknown_fields)]
@@ -548,9 +548,6 @@ impl GeneralConfig {
 #[derive(Debug, Clone, Default, PartialEq, Serialize, Deserialize)]
 #[serde(deny_unknown_fields)]
 pub struct KeyBindings {
-    #[serde(default)]
-    pub remaps: IndexMap<String, Option<String>>,
-
     #[serde(default)]
     pub on_key: BTreeMap<String, Action>,
 
@@ -584,28 +581,9 @@ impl KeyBindings {
             self.default = self.default.and_then(|a| a.sanitized(read_only));
         };
 
-        let mut remaps = IndexMap::new();
-        for (from, maybe_to) in self.remaps.into_iter() {
-            if let Some(to) = maybe_to.as_ref() {
-                let mapped = self.on_key.get(to).cloned();
-                if let Some(a) = mapped {
-                    self.on_key.insert(from.clone(), a.clone());
-                    remaps.insert(from, maybe_to);
-                }
-            } else {
-                self.on_key.remove(&from);
-            }
-        }
-
-        self.remaps = remaps;
         self
     }
 
-    /// Get a reference to the key bindings's remaps.
-    pub fn remaps(&self) -> &IndexMap<String, Option<String>> {
-        &self.remaps
-    }
-
     /// Get a reference to the key bindings's on key.
     pub fn on_key(&self) -> &BTreeMap<String, Action> {
         &self.on_key
@@ -669,57 +647,83 @@ impl Mode {
                     .collect()
             })
             .unwrap_or_else(|| {
-                extra_help_lines
+                let lines = extra_help_lines
                     .unwrap_or_default()
                     .into_iter()
-                    .chain(
-                        self.key_bindings
+                    .chain(self.key_bindings.on_key.iter().filter_map(|(k, a)| {
+                        let remaps = self
+                            .key_bindings
                             .on_key
                             .iter()
-                            .filter(|(k, v)| {
-                                !self
-                                    .key_bindings
-                                    .remaps
-                                    .get(*k)
-                                    .and_then(|mt| {
-                                        mt.as_ref()
-                                            .map(|t| self.key_bindings.on_key.get(t) == Some(v))
-                                    })
-                                    .unwrap_or(false)
+                            .filter_map(|(rk, ra)| {
+                                if rk == k {
+                                    None
+                                } else if a == ra {
+                                    Some(rk.clone())
+                                } else {
+                                    None
+                                }
                             })
-                            .filter_map(|(k, a)| {
-                                a.help.clone().map(|h| HelpMenuLine::KeyMap(k.into(), h))
-                            }),
-                    )
+                            .collect::<Vec<String>>();
+                        a.help
+                            .clone()
+                            .map(|h| HelpMenuLine::KeyMap(k.into(), remaps, h))
+                    }))
                     .chain(
                         self.key_bindings
                             .on_alphabet
                             .iter()
                             .map(|a| ("[a-Z]", a.help.clone()))
-                            .filter_map(|(k, mh)| mh.map(|h| HelpMenuLine::KeyMap(k.into(), h))),
+                            .filter_map(|(k, mh)| {
+                                mh.map(|h| HelpMenuLine::KeyMap(k.into(), vec![], h))
+                            }),
                     )
                     .chain(
                         self.key_bindings
                             .on_number
                             .iter()
                             .map(|a| ("[0-9]", a.help.clone()))
-                            .filter_map(|(k, mh)| mh.map(|h| HelpMenuLine::KeyMap(k.into(), h))),
+                            .filter_map(|(k, mh)| {
+                                mh.map(|h| HelpMenuLine::KeyMap(k.into(), vec![], h))
+                            }),
                     )
                     .chain(
                         self.key_bindings
                             .on_special_character
                             .iter()
                             .map(|a| ("[spcl chars]", a.help.clone()))
-                            .filter_map(|(k, mh)| mh.map(|h| HelpMenuLine::KeyMap(k.into(), h))),
+                            .filter_map(|(k, mh)| {
+                                mh.map(|h| HelpMenuLine::KeyMap(k.into(), vec![], h))
+                            }),
                     )
                     .chain(
                         self.key_bindings
                             .default
                             .iter()
                             .map(|a| ("[default]", a.help.clone()))
-                            .filter_map(|(k, mh)| mh.map(|h| HelpMenuLine::KeyMap(k.into(), h))),
-                    )
-                    .collect()
+                            .filter_map(|(k, mh)| {
+                                mh.map(|h| HelpMenuLine::KeyMap(k.into(), vec![], h))
+                            }),
+                    );
+
+                let mut remapped = HashSet::new();
+                let mut result = vec![];
+
+                for line in lines {
+                    match line {
+                        HelpMenuLine::Paragraph(p) => result.push(HelpMenuLine::Paragraph(p)),
+                        HelpMenuLine::KeyMap(k, r, d) => {
+                            if !remapped.contains(&k) {
+                                for k in r.iter() {
+                                    remapped.insert(k.clone());
+                                }
+                                result.push(HelpMenuLine::KeyMap(k, r, d));
+                            }
+                        }
+                    }
+                }
+
+                result
             })
     }
 

src/init.lua

@@ -557,16 +557,6 @@ xplr.config.modes.builtin.default = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {
-      ["k"] = "up",
-      tab = "ctrl-i",
-      ["/"] = "ctrl-f",
-      ["V"] = "ctrl-a",
-      ["h"] = "left",
-      ["v"] = "space",
-      ["j"] = "down",
-      ["l"] = "right"
-    },
     on_key = {
       ["#"] = {
         help = nil,
@@ -607,7 +597,7 @@ xplr.config.modes.builtin.default = {
       },
       ["G"] = {
         help = "go to bottom",
-        messages = {"FocusLast"}
+        messages = {"PopMode", "FocusLast", "Refresh"}
       },
       ["ctrl-a"] = {
         help = "select/unselect all",
@@ -755,13 +745,20 @@ xplr.config.modes.builtin.default = {
   }
 }
 
+xplr.config.modes.builtin.default.key_bindings.on_key["v"] = xplr.config.modes.builtin.default.key_bindings.on_key.space
+xplr.config.modes.builtin.default.key_bindings.on_key["V"] = xplr.config.modes.builtin.default.key_bindings.on_key["ctrl-a"]
+xplr.config.modes.builtin.default.key_bindings.on_key["/"] = xplr.config.modes.builtin.default.key_bindings.on_key["ctrl-f"]
+xplr.config.modes.builtin.default.key_bindings.on_key["h"] = xplr.config.modes.builtin.default.key_bindings.on_key.left
+xplr.config.modes.builtin.default.key_bindings.on_key["j"] = xplr.config.modes.builtin.default.key_bindings.on_key.bottom
+xplr.config.modes.builtin.default.key_bindings.on_key["k"] = xplr.config.modes.builtin.default.key_bindings.on_key.up
+xplr.config.modes.builtin.default.key_bindings.on_key["l"] = xplr.config.modes.builtin.default.key_bindings.on_key.right
+
 ------ Recover
 xplr.config.modes.builtin.recover = {
   name = "recover",
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["ctrl-c"] = {
         help = "terminate",
@@ -788,7 +785,6 @@ xplr.config.modes.builtin.selection_ops = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["c"] = {
         help = "copy here",
@@ -878,7 +874,6 @@ xplr.config.modes.builtin.create = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["ctrl-c"] = {
         help = "terminate",
@@ -926,7 +921,6 @@ xplr.config.modes.builtin.create_directory = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       backspace = {
         help = "remove last character",
@@ -989,7 +983,6 @@ xplr.config.modes.builtin.create_file = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       backspace = {
         help = "remove last character",
@@ -1052,10 +1045,6 @@ xplr.config.modes.builtin.number = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {
-      ["j"] = "down",
-      ["k"] = "up"
-    },
     on_key = {
       backspace = {
         help = "remove last character",
@@ -1104,13 +1093,15 @@ xplr.config.modes.builtin.number = {
   }
 }
 
+xplr.config.modes.builtin.number.key_bindings.on_key["j"] = xplr.config.modes.builtin.number.key_bindings.on_key.down
+xplr.config.modes.builtin.number.key_bindings.on_key["k"] = xplr.config.modes.builtin.number.key_bindings.on_key.up
+
 ------ Go to
 xplr.config.modes.builtin.go_to = {
   name = "go to",
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["ctrl-c"] = {
         help = "terminate",
@@ -1165,7 +1156,6 @@ xplr.config.modes.builtin.rename = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       backspace = {
         help = "remove last character",
@@ -1225,7 +1215,6 @@ xplr.config.modes.builtin.delete = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["D"] = {
         help = "force delete",
@@ -1297,7 +1286,6 @@ xplr.config.modes.builtin.action = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["!"] = {
         help = "shell",
@@ -1389,11 +1377,6 @@ xplr.config.modes.builtin.search = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {
-      esc = "enter",
-      ["ctrl-n"] = "down",
-      ["ctrl-p"] = "up"
-    },
     on_key = {
       backspace = {
         help = "remove last character",
@@ -1509,15 +1492,16 @@ xplr.config.modes.builtin.search = {
   }
 }
 
+xplr.config.modes.builtin.search.key_bindings.on_key["esc"] = xplr.config.modes.builtin.search.key_bindings.on_key.enter
+xplr.config.modes.builtin.search.key_bindings.on_key["ctrl-n"] = xplr.config.modes.builtin.search.key_bindings.on_key.down
+xplr.config.modes.builtin.search.key_bindings.on_key["ctrl-p"] = xplr.config.modes.builtin.search.key_bindings.on_key.up
+
 ------ Filter
 xplr.config.modes.builtin.filter = {
   name = "filter",
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {
-      esc = "enter"
-    },
     on_key = {
       ["R"] = {
         help = "relative does not contain",
@@ -1577,13 +1561,14 @@ xplr.config.modes.builtin.filter = {
   }
 }
 
+xplr.config.modes.builtin.filter.key_bindings.on_key["esc"] = xplr.config.modes.builtin.filter.key_bindings.on_key.enter
+
 ------ Relative path does contain
 xplr.config.modes.builtin.relative_path_does_contain = {
   name = "relative path does contain",
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       backspace = {
         help = "remove last character",
@@ -1671,7 +1656,6 @@ xplr.config.modes.builtin.relative_path_does_not_contain = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       backspace = {
         help = "remove last character",
@@ -1758,9 +1742,6 @@ xplr.config.modes.builtin.sort = {
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {
-      esc = "enter"
-    },
     on_key = {
       ["!"] = {
         help = "reverse sorters",
@@ -1938,13 +1919,14 @@ xplr.config.modes.builtin.sort = {
   }
 }
 
+xplr.config.modes.builtin.sort.key_bindings.on_key["esc"] = xplr.config.modes.builtin.sort.key_bindings.on_key.enter
+
 ------ Switch layout
 xplr.config.modes.builtin.switch_layout = {
   name = "switch layout",
   help = nil,
   extra_help = nil,
   key_bindings = {
-    remaps = {},
     on_key = {
       ["1"] = {
         help = "default",

src/ui.rs

@@ -680,17 +680,8 @@ fn draw_help_menu<B: Backend>(
         .into_iter()
         .map(|l| match l {
             HelpMenuLine::Paragraph(p) => Row::new([Cell::from(p)].to_vec()),
-            HelpMenuLine::KeyMap(k, h) => {
-                let remaps = app
-                    .mode()
-                    .key_bindings()
-                    .remaps()
-                    .iter()
-                    .filter(|(_, maybeto)| maybeto.as_ref().map(|to| to == &k).unwrap_or(false))
-                    .map(|(f, _)| f.clone())
-                    .collect::<Vec<String>>()
-                    .join("|");
-                Row::new([Cell::from(k), Cell::from(remaps), Cell::from(h)].to_vec())
+            HelpMenuLine::KeyMap(k, remaps, h) => {
+                Row::new([Cell::from(k), Cell::from(remaps.join("|")), Cell::from(h)].to_vec())
             }
         })
         .collect::<Vec<Row>>();