Merge pull request #6 from helix-editor/compositor

Compositor v2 rewrite

1 files changed, 217 insertions, 0 deletions

diff --git a/helix-term/src/keymap.rs b/helix-term/src/keymap.rs
new file mode 100644
index 00000000..af46f7a4
--- /dev/null
+++ b/helix-term/src/keymap.rs
@@ -0,0 +1,217 @@
+use crate::commands::{self, Command};
+use helix_core::hashmap;
+use helix_view::document::Mode;
+use std::collections::HashMap;
+
+// Kakoune-inspired:
+// mode = {
+//      normal = {
+//          q = record_macro
+//          w = (next) word
+//          W = next WORD
+//          e = end of word
+//          E = end of WORD
+//          r =
+//          t = 'till char
+//          y = yank
+//          u = undo
+//          U = redo
+//          i = insert
+//          I = INSERT (start of line)
+//          o = open below (insert on new line below)
+//          O = open above (insert on new line above)
+//          p = paste (before cursor)
+//          P = PASTE (after cursor)
+//          ` =
+//          [ = select to text object start (alt = select whole object)
+//          ] = select to text object end
+//          { = extend to inner object start
+//          } = extend to inner object end
+//          a = append
+//          A = APPEND (end of line)
+//          s = split
+//          S = select
+//          d = delete()
+//          f = find_char()
+//          g = goto (gg, G, gc, gd, etc)
+//
+//          h = move_char_left(n)
+//          j = move_line_down(n)
+//          k = move_line_up(n)
+//          l = move_char_right(n)
+//          : = command line
+//          ; = collapse selection to cursor
+//          " = use register
+//          ` = convert case? (to lower) (alt = swap case)
+//          ~ = convert to upper case
+//          . = repeat last command
+//          \ = disable hook?
+//          / = search
+//          > = indent
+//          < = deindent
+//          % = select whole buffer (in vim = jump to matching bracket)
+//          * = search pattern in selection
+//          ( = rotate main selection backward
+//          ) = rotate main selection forward
+//          - = trim selections? (alt = merge contiguous sel together)
+//          @ = convert tabs to spaces
+//          & = align cursor
+//          ? = extend to next given regex match (alt = to prev)
+//
+//          in kakoune these are alt-h alt-l / gh gl
+//                              select from curs to begin end / move curs to begin end
+//          0 = start of line
+//          ^ = start of line (first non blank char)
+//          $ = end of line
+//
+//          z = save selections
+//          Z = restore selections
+//          x = select line
+//          X = extend line
+//          c = change selected text
+//          C = copy selection?
+//          v = view menu (viewport manipulation)
+//          b = select to previous word start
+//          B = select to previous WORD start
+//
+//
+//
+//
+//
+//
+//          = = align?
+//          + =
+//      }
+//
+//      gd = goto definition
+//      gr = goto reference
+// }
+
+// #[cfg(feature = "term")]
+pub use crossterm::event::{KeyCode, KeyEvent as Key, KeyModifiers as Modifiers};
+
+// TODO: could be trie based
+pub type Keymap = HashMap<Vec<Key>, Command>;
+pub type Keymaps = HashMap<Mode, Keymap>;
+
+macro_rules! key {
+    ($ch:expr) => {
+        Key {
+            code: KeyCode::Char($ch),
+            modifiers: Modifiers::NONE,
+        }
+    };
+}
+
+macro_rules! shift {
+    ($ch:expr) => {
+        Key {
+            code: KeyCode::Char($ch),
+            modifiers: Modifiers::SHIFT,
+        }
+    };
+}
+
+macro_rules! ctrl {
+    ($ch:expr) => {
+        Key {
+            code: KeyCode::Char($ch),
+            modifiers: Modifiers::CONTROL,
+        }
+    };
+}
+
+// macro_rules! alt {
+//     ($ch:expr) => {
+//         Key {
+//             code: KeyCode::Char($ch),
+//             modifiers: Modifiers::ALT,
+//         }
+//     };
+// }
+
+pub fn default() -> Keymaps {
+    hashmap!(
+        Mode::Normal =>
+            // as long as you cast the first item, rust is able to infer the other cases
+            hashmap!(
+                vec![key!('h')] => commands::move_char_left as Command,
+                vec![key!('j')] => commands::move_line_down,
+                vec![key!('k')] => commands::move_line_up,
+                vec![key!('0')] => commands::move_line_start,
+                vec![key!('$')] => commands::move_line_end,
+                vec![key!('l')] => commands::move_char_right,
+                vec![shift!('H')] => commands::extend_char_left,
+                vec![shift!('J')] => commands::extend_line_down,
+                vec![shift!('K')] => commands::extend_line_up,
+                vec![shift!('L')] => commands::extend_char_right,
+                vec![key!('w')] => commands::move_next_word_start,
+                vec![key!('b')] => commands::move_prev_word_start,
+                vec![key!('e')] => commands::move_next_word_end,
+                vec![key!('g')] => commands::goto_mode,
+                vec![key!('i')] => commands::insert_mode,
+                vec![shift!('I')] => commands::prepend_to_line,
+                vec![key!('a')] => commands::append_mode,
+                vec![shift!('A')] => commands::append_to_line,
+                vec![key!('o')] => commands::open_below,
+                vec![key!('d')] => commands::delete_selection,
+                vec![key!('c')] => commands::change_selection,
+                vec![key!('s')] => commands::split_selection_on_newline,
+                vec![key!(';')] => commands::collapse_selection,
+                // TODO should be alt(;)
+                vec![key!('%')] => commands::flip_selections,
+                vec![key!('x')] => commands::select_line,
+                vec![key!('u')] => commands::undo,
+                vec![shift!('U')] => commands::redo,
+                vec![key!('y')] => commands::yank,
+                vec![key!('p')] => commands::paste,
+                vec![key!('>')] => commands::indent,
+                vec![key!('<')] => commands::unindent,
+                vec![key!(':')] => commands::command_mode,
+                vec![Key {
+                    code: KeyCode::Esc,
+                    modifiers: Modifiers::NONE
+                }] => commands::normal_mode,
+                vec![Key {
+                    code: KeyCode::PageUp,
+                    modifiers: Modifiers::NONE
+                }] => commands::page_up,
+                vec![Key {
+                    code: KeyCode::PageDown,
+                    modifiers: Modifiers::NONE
+                }] => commands::page_down,
+                vec![ctrl!('u')] => commands::half_page_up,
+                vec![ctrl!('d')] => commands::half_page_down,
+            ),
+            Mode::Insert => hashmap!(
+                vec![Key {
+                    code: KeyCode::Esc,
+                    modifiers: Modifiers::NONE
+                }] => commands::normal_mode as Command,
+                vec![Key {
+                    code: KeyCode::Backspace,
+                    modifiers: Modifiers::NONE
+                }] => commands::insert::delete_char_backward,
+                vec![Key {
+                    code: KeyCode::Delete,
+                    modifiers: Modifiers::NONE
+                }] => commands::insert::delete_char_forward,
+                vec![Key {
+                    code: KeyCode::Enter,
+                    modifiers: Modifiers::NONE
+                }] => commands::insert::insert_newline,
+                vec![Key {
+                    code: KeyCode::Tab,
+                    modifiers: Modifiers::NONE
+                }] => commands::insert::insert_tab,
+            ),
+            Mode::Goto => hashmap!(
+                vec![Key {
+                    code: KeyCode::Esc,
+                    modifiers: Modifiers::NONE
+                }] => commands::normal_mode as Command,
+                vec![key!('g')] => commands::move_file_start as Command,
+                vec![key!('e')] => commands::move_file_end as Command,
+            ),
+    )
+}