First pass at making a linux keymap (#8082)

Undoubtedly not perfect, but this should be something we can work off
of.

Note that matching keybindings with ctrl in them is currently broken on
linux (or at least x11). This keymap might just manage to be less useful
than using the macos one on linux until that is fixed... the proximate
cause of this is that the `key` field of the `Keystroke` struct looks
like `"\u{e}"` instead of `"n"` when `ctrl-n` is pressed.

Release Notes:

- N/A

crates/collab/src/tests/test_server.rs

@@ -273,7 +273,7 @@ impl TestServer {
             collab_ui::init(&app_state, cx);
             file_finder::init(cx);
             menu::init();
-            settings::KeymapFile::load_asset("keymaps/default.json", cx).unwrap();
+            settings::KeymapFile::load_asset("keymaps/default-macos.json", cx).unwrap();
         });
 
         client

crates/settings/src/settings.rs

@@ -21,8 +21,14 @@ pub fn default_settings() -> Cow<'static, str> {
     asset_str::<SettingsAssets>("settings/default.json")
 }
 
+#[cfg(target_os = "macos")]
+pub const DEFAULT_KEYMAP_PATH: &str = "keymaps/default-macos.json";
+
+#[cfg(not(target_os = "macos"))]
+pub const DEFAULT_KEYMAP_PATH: &str = "keymaps/default-linux.json";
+
 pub fn default_keymap() -> Cow<'static, str> {
-    asset_str::<SettingsAssets>("keymaps/default.json")
+    asset_str::<SettingsAssets>(DEFAULT_KEYMAP_PATH)
 }
 
 pub fn vim_keymap() -> Cow<'static, str> {

crates/vim/src/test/vim_test_context.rs

@@ -54,7 +54,7 @@ impl VimTestContext {
             cx.update_global(|store: &mut SettingsStore, cx| {
                 store.update_user_settings::<VimModeSetting>(cx, |s| *s = Some(enabled));
             });
-            settings::KeymapFile::load_asset("keymaps/default.json", cx).unwrap();
+            settings::KeymapFile::load_asset("keymaps/default-macos.json", cx).unwrap();
             if enabled {
                 settings::KeymapFile::load_asset("keymaps/vim.json", cx).unwrap();
             }

crates/zed/src/zed.rs

@@ -26,6 +26,7 @@ use runnable::static_source::StaticSource;
 use search::project_search::ProjectSearchBar;
 use settings::{
     initial_local_settings_content, watch_config_file, KeymapFile, Settings, SettingsStore,
+    DEFAULT_KEYMAP_PATH,
 };
 use std::{borrow::Cow, ops::Deref, path::Path, sync::Arc};
 use terminal_view::terminal_panel::{self, TerminalPanel};
@@ -570,7 +571,7 @@ fn reload_keymaps(cx: &mut AppContext, keymap_content: &KeymapFile) {
 }
 
 pub fn load_default_keymap(cx: &mut AppContext) {
-    KeymapFile::load_asset("keymaps/default.json", cx).unwrap();
+    KeymapFile::load_asset(DEFAULT_KEYMAP_PATH, cx).unwrap();
     if VimModeSetting::get_global(cx).0 {
         KeymapFile::load_asset("keymaps/vim.json", cx).unwrap();
     }