Additions to the InputSelector (resolving #4226) (#4227)

* First step towards implementing #4226.
* Added InputSelector config options.
* Format + fix to prepare for PR to resolve #4226.
* Accept suggestion about pop().
* Fix typo.
* Tried fixing stuff from the feedback.
* Fixed typo.
* Fixed small mistake in docs.
* Small fix for label computation.
* Allow uppercase alphabet + add fuzzy_description.
* Minor cleanup.
* Use more standard alphabet (without j/k).
* Fixed docs after previous commit.
* Added key assignments to docs.
* Apply suggestions from code review (2 remaining)
* Updated arcording to feedback (added tests).
* Update docs (1 thing left to do)
* Added version details to the key table.

---------

Co-authored-by: Wez Furlong <wez@wezfurlong.org>

config/src/keyassignment.rs

@@ -477,6 +477,27 @@ pub struct InputSelector {
 
     #[dynamic(default)]
     pub fuzzy: bool,
+
+    #[dynamic(default = "default_num_alphabet")]
+    pub alphabet: String,
+
+    #[dynamic(default = "default_description")]
+    pub description: String,
+
+    #[dynamic(default = "default_fuzzy_description")]
+    pub fuzzy_description: String,
+}
+
+fn default_num_alphabet() -> String {
+    "1234567890abcdefghilmnopqrstuvwxyz".to_string()
+}
+
+fn default_description() -> String {
+    "Select an item and press Enter = accept,  Esc = cancel,  / = filter".to_string()
+}
+
+fn default_fuzzy_description() -> String {
+    "Fuzzy matching: ".to_string()
 }
 
 #[derive(Debug, Clone, PartialEq, FromDynamic, ToDynamic)]

docs/config/lua/keyassignment/InputSelector.md

@@ -8,7 +8,7 @@ to select from.
 When the user accepts a line, emits an event that allows you to act
 upon the input.
 
-`InputSelector` accepts three fields:
+`InputSelector` accepts the following fields:
 
 * `title` - the title that will be set for the overlay pane
 * `choices` - a lua table consisting of the potential choices. Each entry
@@ -22,6 +22,51 @@ upon the input.
   objects from the current pane and window, and `id` and `label` hold the
   corresponding fields from the selected choice. Both will be `nil` if
   the overlay is cancelled without selecting anything.
+* `fuzzy` - a boolean that defaults to `false`. If `true`, InputSelector will start
+  in its fuzzy finding mode (this is equivalent to starting the InputSelector and
+  pressing / in the default mode).
+
+{{since('nightly')}}
+
+These additional fields are also available:
+
+* `alphabet` - a string of unique characters. The characters in the string are used
+  to calculate one or two click shortcuts that can be used to quickly choose from
+  the InputSelector when in the default mode. Defaults to:
+  `"1234567890abcdefghilmnopqrstuvwxyz"`. (Without j/k so they can be used for movement
+  up and down.)
+* `description` - a string to display when in the default mode. Defaults to:
+  `"Select an item and press Enter = accept,  Esc = cancel,  / = filter"`.
+* `fuzzy_description` - a string to display when in fuzzy finding mode. Defaults to:
+  `"Fuzzy matching: "`.
+
+
+### Key Assignments
+
+The default key assignments in the InputSelector are as follows:
+
+| Action  |  Key Assignment |
+|---------|-------------------|
+| Add to selection string until a match is found (if in the default mode) | Any key in `alphabet` {{since('nightly', inline=True)}} |
+| Select matching number (if in the default mode) | <kbd>1</kbd> to <kbd>9</kbd> {{since('20230408-112425-69ae8472', inline=True)}} |
+| Start fuzzy search (if in the default mode) | <kbd>/</kbd> |
+| Add to filtering string (if in fuzzy finding mode) | Any key not listed below |
+| Remove from selection or filtering string | <kbd>Backspace</kbd> |
+| Pick currently highlighted line | <kbd>Enter</kbd> |
+|                                 | <kbd>LeftClick</kbd> (with mouse) |
+| Move Down      | <kbd>DownArrow</kbd> |
+|                | <kbd>Ctrl</kbd> + <kbd>N</kbd> |
+|                | <kbd>Ctrl</kbd> + <kbd>J</kbd> {{since('nightly', inline=True)}} |
+|                | <kbd>j</kbd> (if not in `alphabet`) |
+| Move Up        | <kbd>UpArrow</kbd>  |
+|                | <kbd>Ctrl</kbd> + <kbd>P</kbd> |
+|                | <kbd>Ctrl</kbd> + <kbd>K</kbd> {{since('nightly', inline=True)}} |
+|                | <kbd>k</kbd>  (if not in `alphabet`)   |
+| Quit     | <kbd>Ctrl</kbd> + <kbd>G</kbd> |
+|          | <kbd>Ctrl</kbd> + <kbd>C</kbd> {{since('nightly', inline=True)}} |
+|          | <kbd>Escape</kbd> |
+
+Note: If the InputSelector is started with `fuzzy` set to `false`, then <kbd>Backspace</kbd> can go from fuzzy finding mode back to the default mode when pressed while the filtering string is empty.
 
 ## Example of choosing some canned text to enter into the terminal
 
@@ -95,7 +140,7 @@ config.keys = {
       -- could read or compute data from other sources
 
       local choices = {}
-      for n = 1, 10 do
+      for n = 1, 20 do
         table.insert(choices, { label = tostring(n) })
       end
 
@@ -113,6 +158,8 @@ config.keys = {
           end),
           title = 'I am title',
           choices = choices,
+          alphabet = '123456789',
+          description = 'Write the number you want to choose or press / to search.',
         },
         pane
       )
@@ -123,5 +170,66 @@ config.keys = {
 return config
 ```
 
+## Example of switching between a list of workspaces with the InputSelector
+
+```lua
+local wezterm = require 'wezterm'
+local act = wezterm.action
+local config = wezterm.config_builder()
+
+config.keys = {
+  {
+    key = 'S',
+    mods = 'CTRL|SHIFT',
+    action = wezterm.action_callback(function(window, pane)
+      -- Here you can dynamically construct a longer list if needed
+
+      local home = wezterm.home_dir
+      local workspaces = {
+        { id = home, label = 'Home' },
+        { id = home .. '/work', label = 'Work' },
+        { id = home .. '/personal', label = 'Personal' },
+        { id = home .. '/.config', label = 'Config' },
+      }
+
+      window:perform_action(
+        act.InputSelector {
+          action = wezterm.action_callback(
+            function(inner_window, inner_pane, id, label)
+              if not id and not label then
+                wezterm.log_info 'cancelled'
+              else
+                wezterm.log_info('id = ' .. id)
+                wezterm.log_info('label = ' .. label)
+                inner_window:perform_action(
+                  act.SwitchToWorkspace {
+                    name = label,
+                    spawn = {
+                      label = 'Workspace: ' .. label,
+                      cwd = id,
+                    },
+                  },
+                  inner_pane
+                )
+              end
+            end
+          ),
+          title = 'Choose Workspace',
+          choices = workspaces,
+          fuzzy = true,
+          fuzzy_description = 'Fuzzy find and/or make a workspace',
+        },
+        pane
+      )
+    end),
+  },
+}
+
+return config
+```
+
+
+
+
 See also [PromptInputLine](PromptInputLine.md).
 

wezterm-gui/src/overlay/quickselect.rs

@@ -57,10 +57,32 @@ const PATTERNS: [&str; 14] = [
 /// It is derived from https://github.com/fcsonline/tmux-thumbs/blob/master/src/alphabets.rs
 /// which is Copyright (c) 2019 Ferran Basora and provided under the MIT license
 pub fn compute_labels_for_alphabet(alphabet: &str, num_matches: usize) -> Vec<String> {
-    let alphabet = alphabet
-        .chars()
-        .map(|c| c.to_lowercase().to_string())
-        .collect::<Vec<String>>();
+    compute_labels_for_alphabet_impl(alphabet, num_matches, true)
+}
+
+pub fn compute_labels_for_alphabet_with_preserved_case(
+    alphabet: &str,
+    num_matches: usize,
+) -> Vec<String> {
+    compute_labels_for_alphabet_impl(alphabet, num_matches, false)
+}
+
+fn compute_labels_for_alphabet_impl(
+    alphabet: &str,
+    num_matches: usize,
+    make_lowercase: bool,
+) -> Vec<String> {
+    let alphabet = if make_lowercase {
+        alphabet
+            .chars()
+            .map(|c| c.to_lowercase().to_string())
+            .collect::<Vec<String>>()
+    } else {
+        alphabet
+            .chars()
+            .map(|c| c.to_string())
+            .collect::<Vec<String>>()
+    };
     // Prefer to use single character matches to represent everything
     let mut primary = alphabet.clone();
     let mut secondary = vec![];
@@ -144,6 +166,30 @@ mod alphabet_test {
             vec!["aa", "ab", "ba", "bb"]
         );
     }
+
+    #[test]
+    fn composed_capital() {
+        assert_eq!(
+            compute_labels_for_alphabet_with_preserved_case("AB", 4),
+            vec!["AA", "AB", "BA", "BB"]
+        );
+    }
+
+    #[test]
+    fn composed_mixed() {
+        assert_eq!(
+            compute_labels_for_alphabet_with_preserved_case("aA", 4),
+            vec!["aa", "aA", "Aa", "AA"]
+        );
+    }
+
+    #[test]
+    fn lowercase_alphabet_equal() {
+        assert_eq!(
+            compute_labels_for_alphabet_with_preserved_case("abc123", 12),
+            compute_labels_for_alphabet("abc123", 12)
+        );
+    }
 }
 
 pub struct QuickSelectOverlay {