emacs: Support more default keybindings (#40101)

Hello,

Thanks for the great work.
I am adding some more bindings for the emacs keymap:
- `command_palette::Toggle` as replacement for the emacs command
dispatcher
- other default aliases for existing move / delete commands
  - e.g. `alt-left` to move to previous word and `alt-del` to delete it
- some missing `SelectTo` equivalents for move commands on selection
mode

Release Notes:
- Added bindings for the Emacs keymap

assets/keymaps/linux/emacs.json

@@ -11,8 +11,10 @@
   {
     "context": "Editor",
     "bindings": {
+      "alt-x": "command_palette::Toggle",
       "ctrl-g": "editor::Cancel",
       "ctrl-x b": "tab_switcher::Toggle", // switch-to-buffer
+      "ctrl-x ctrl-b": "tab_switcher::Toggle", // list-buffers
       "alt-g g": "go_to_line::Toggle", // goto-line
       "alt-g alt-g": "go_to_line::Toggle", // goto-line
       "ctrl-space": "editor::SetMark", // set-mark
@@ -29,6 +31,8 @@
       "shift-home": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": false }], // move-beginning-of-line
       "shift-end": ["editor::SelectToEndOfLine", { "stop_at_soft_wraps": false }], // move-end-of-line
       "alt-m": ["editor::MoveToBeginningOfLine", { "stop_at_soft_wraps": false, "stop_at_indent": true }], // back-to-indentation
+      "alt-left": "editor::MoveToPreviousWordStart", // left-word
+      "alt-right": "editor::MoveToNextWordEnd", // right-word
       "alt-f": "editor::MoveToNextSubwordEnd", // forward-word
       "alt-b": "editor::MoveToPreviousSubwordStart", // backward-word
       "alt-u": "editor::ConvertToUpperCase", // upcase-word
@@ -43,6 +47,8 @@
       "ctrl-x h": "editor::SelectAll", // mark-whole-buffer
       "ctrl-d": "editor::Delete", // delete-char
       "alt-d": ["editor::DeleteToNextWordEnd", { "ignore_newlines": false, "ignore_brackets": false }], // kill-word
+      "alt-backspace": "editor::DeleteToPreviousWordStart", // backward-kill-word
+      "alt-delete": "editor::DeleteToPreviousWordStart", // backward-kill-word
       "ctrl-k": "editor::KillRingCut", // kill-line
       "ctrl-w": "editor::Cut", // kill-region
       "alt-w": "editor::Copy", // kill-ring-save
@@ -52,14 +58,19 @@
       "ctrl-x u": "editor::Undo", // undo
       "alt-{": "editor::MoveToStartOfParagraph", // backward-paragraph
       "alt-}": "editor::MoveToEndOfParagraph", // forward-paragraph
+      "ctrl-up": "editor::MoveToStartOfParagraph", // backward-paragraph
+      "ctrl-down": "editor::MoveToEndOfParagraph", // forward-paragraph
       "ctrl-v": "editor::MovePageDown", // scroll-up
       "alt-v": "editor::MovePageUp", // scroll-down
       "ctrl-x [": "editor::MoveToBeginning", // beginning-of-buffer
       "ctrl-x ]": "editor::MoveToEnd", // end-of-buffer
       "alt-<": "editor::MoveToBeginning", // beginning-of-buffer
       "alt->": "editor::MoveToEnd", // end-of-buffer
+      "ctrl-home": "editor::MoveToBeginning", // beginning-of-buffer
+      "ctrl-end": "editor::MoveToEnd", // end-of-buffer
       "ctrl-l": "editor::ScrollCursorCenterTopBottom", // recenter-top-bottom
       "ctrl-s": "buffer_search::Deploy", // isearch-forward
+      "ctrl-r": "buffer_search::Deploy", // isearch-backward
       "alt-^": "editor::JoinLines", // join-line
       "alt-q": "editor::Rewrap" // fill-paragraph
     }
@@ -85,10 +96,19 @@
       "end": ["editor::SelectToEndOfLine", { "stop_at_soft_wraps": false }],
       "ctrl-a": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": false }],
       "ctrl-e": ["editor::SelectToEndOfLine", { "stop_at_soft_wraps": false }],
+      "alt-m": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": false, "stop_at_indent": true }],
       "alt-f": "editor::SelectToNextWordEnd",
       "alt-b": "editor::SelectToPreviousSubwordStart",
+      "alt-{": "editor::SelectToStartOfParagraph",
+      "alt-}": "editor::SelectToEndOfParagraph",
+      "ctrl-up": "editor::SelectToStartOfParagraph",
+      "ctrl-down": "editor::SelectToEndOfParagraph",
+      "ctrl-x [": "editor::SelectToBeginning",
+      "ctrl-x ]": "editor::SelectToEnd",
       "alt-<": "editor::SelectToBeginning",
       "alt->": "editor::SelectToEnd",
+      "ctrl-home": "editor::SelectToBeginning",
+      "ctrl-end": "editor::SelectToEnd",
       "ctrl-g": "editor::Cancel"
     }
   },

assets/keymaps/macos/emacs.json

@@ -12,8 +12,10 @@
   {
     "context": "Editor",
     "bindings": {
+      "alt-x": "command_palette::Toggle",
       "ctrl-g": "editor::Cancel",
       "ctrl-x b": "tab_switcher::Toggle", // switch-to-buffer
+      "ctrl-x ctrl-b": "tab_switcher::Toggle", // list-buffers
       "alt-g g": "go_to_line::Toggle", // goto-line
       "alt-g alt-g": "go_to_line::Toggle", // goto-line
       "ctrl-space": "editor::SetMark", // set-mark
@@ -30,6 +32,8 @@
       "shift-home": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": false }], // move-beginning-of-line
       "shift-end": ["editor::SelectToEndOfLine", { "stop_at_soft_wraps": false }], // move-end-of-line
       "alt-m": ["editor::MoveToBeginningOfLine", { "stop_at_soft_wraps": false, "stop_at_indent": true }], // back-to-indentation
+      "alt-left": "editor::MoveToPreviousWordStart", // left-word
+      "alt-right": "editor::MoveToNextWordEnd", // right-word
       "alt-f": "editor::MoveToNextSubwordEnd", // forward-word
       "alt-b": "editor::MoveToPreviousSubwordStart", // backward-word
       "alt-u": "editor::ConvertToUpperCase", // upcase-word
@@ -44,6 +48,8 @@
       "ctrl-x h": "editor::SelectAll", // mark-whole-buffer
       "ctrl-d": "editor::Delete", // delete-char
       "alt-d": ["editor::DeleteToNextWordEnd", { "ignore_newlines": false, "ignore_brackets": false }], // kill-word
+      "alt-backspace": "editor::DeleteToPreviousWordStart", // backward-kill-word
+      "alt-delete": "editor::DeleteToPreviousWordStart", // backward-kill-word
       "ctrl-k": "editor::KillRingCut", // kill-line
       "ctrl-w": "editor::Cut", // kill-region
       "alt-w": "editor::Copy", // kill-ring-save
@@ -53,14 +59,19 @@
       "ctrl-x u": "editor::Undo", // undo
       "alt-{": "editor::MoveToStartOfParagraph", // backward-paragraph
       "alt-}": "editor::MoveToEndOfParagraph", // forward-paragraph
+      "ctrl-up": "editor::MoveToStartOfParagraph", // backward-paragraph
+      "ctrl-down": "editor::MoveToEndOfParagraph", // forward-paragraph
       "ctrl-v": "editor::MovePageDown", // scroll-up
       "alt-v": "editor::MovePageUp", // scroll-down
       "ctrl-x [": "editor::MoveToBeginning", // beginning-of-buffer
       "ctrl-x ]": "editor::MoveToEnd", // end-of-buffer
       "alt-<": "editor::MoveToBeginning", // beginning-of-buffer
       "alt->": "editor::MoveToEnd", // end-of-buffer
+      "ctrl-home": "editor::MoveToBeginning", // beginning-of-buffer
+      "ctrl-end": "editor::MoveToEnd", // end-of-buffer
       "ctrl-l": "editor::ScrollCursorCenterTopBottom", // recenter-top-bottom
       "ctrl-s": "buffer_search::Deploy", // isearch-forward
+      "ctrl-r": "buffer_search::Deploy", // isearch-backward
       "alt-^": "editor::JoinLines", // join-line
       "alt-q": "editor::Rewrap" // fill-paragraph
     }
@@ -86,10 +97,19 @@
       "end": ["editor::SelectToEndOfLine", { "stop_at_soft_wraps": false }],
       "ctrl-a": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": false }],
       "ctrl-e": ["editor::SelectToEndOfLine", { "stop_at_soft_wraps": false }],
+      "alt-m": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": false, "stop_at_indent": true }],
       "alt-f": "editor::SelectToNextWordEnd",
       "alt-b": "editor::SelectToPreviousSubwordStart",
+      "alt-{": "editor::SelectToStartOfParagraph",
+      "alt-}": "editor::SelectToEndOfParagraph",
+      "ctrl-up": "editor::SelectToStartOfParagraph",
+      "ctrl-down": "editor::SelectToEndOfParagraph",
+      "ctrl-x [": "editor::SelectToBeginning",
+      "ctrl-x ]": "editor::SelectToEnd",
       "alt-<": "editor::SelectToBeginning",
       "alt->": "editor::SelectToEnd",
+      "ctrl-home": "editor::SelectToBeginning",
+      "ctrl-end": "editor::SelectToEnd",
       "ctrl-g": "editor::Cancel"
     }
   },