gf as goto_file (#1102)

* goto_file

* support goto_file under current cursor

* add C-w f/F

* sync space w with window mode

* Update helix-term/src/commands.rs

Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>

book/src/keymap.md

@@ -160,6 +160,7 @@ Jumps to various locations.
 | ----- | -----------                                      | -------                    |
 | `g`   | Go to the start of the file                      | `goto_file_start`          |
 | `e`   | Go to the end of the file                        | `goto_last_line`           |
+| `f`   | Go to files in the selection                     | `goto_file`                |
 | `h`   | Go to the start of the line                      | `goto_line_start`          |
 | `l`   | Go to the end of the line                        | `goto_line_end`            |
 | `s`   | Go to first non-whitespace character of the line | `goto_first_nonwhitespace` |
@@ -202,6 +203,8 @@ This layer is similar to vim keybindings as kakoune does not support window.
 | `v`, `Ctrl-v`          | Vertical right split           | `vsplit`          |
 | `s`, `Ctrl-s`          | Horizontal bottom split        | `hsplit`          |
 | `h`, `Ctrl-h`, `left`  | Move to left split             | `jump_view_left`  |
+| `f`                    | Go to files in the selection in horizontal splits  | `goto_file`                |
+| `F`                    | Go to files in the selection in vertical splits    | `goto_file`                |
 | `j`, `Ctrl-j`, `down`  | Move to split below            | `jump_view_down`  |
 | `k`, `Ctrl-k`, `up`    | Move to split above            | `jump_view_up`    |
 | `l`, `Ctrl-l`, `right` | Move to right split            | `jump_view_right` |

helix-term/src/commands.rs

@@ -259,6 +259,9 @@ impl Command {
         goto_implementation, "Goto implementation",
         goto_file_start, "Goto file start/line",
         goto_file_end, "Goto file end",
+        goto_file, "Goto files in the selection",
+        goto_file_hsplit, "Goto files in the selection in horizontal splits",
+        goto_file_vsplit, "Goto files in the selection in vertical splits",
         goto_reference, "Goto references",
         goto_window_top, "Goto window top",
         goto_window_middle, "Goto window middle",
@@ -835,6 +838,49 @@ fn goto_file_end(cx: &mut Context) {
     doc.set_selection(view.id, selection);
 }
 
+fn goto_file(cx: &mut Context) {
+    goto_file_impl(cx, Action::Replace);
+}
+
+fn goto_file_hsplit(cx: &mut Context) {
+    goto_file_impl(cx, Action::HorizontalSplit);
+}
+
+fn goto_file_vsplit(cx: &mut Context) {
+    goto_file_impl(cx, Action::VerticalSplit);
+}
+
+fn goto_file_impl(cx: &mut Context, action: Action) {
+    let (view, doc) = current_ref!(cx.editor);
+    let text = doc.text();
+    let selections = doc.selection(view.id);
+    let mut paths: Vec<_> = selections
+        .iter()
+        .map(|r| text.slice(r.from()..r.to()).to_string())
+        .collect();
+    let primary = selections.primary();
+    if selections.len() == 1 && primary.to() - primary.from() == 1 {
+        let current_word = movement::move_next_long_word_start(
+            text.slice(..),
+            movement::move_prev_long_word_start(text.slice(..), primary, 1),
+            1,
+        );
+        paths.clear();
+        paths.push(
+            text.slice(current_word.from()..current_word.to())
+                .to_string(),
+        );
+    }
+    for sel in paths {
+        let p = sel.trim();
+        if !p.is_empty() {
+            if let Err(e) = cx.editor.open(PathBuf::from(p), action) {
+                cx.editor.set_error(format!("Open file failed: {:?}", e));
+            }
+        }
+    }
+}
+
 fn extend_word_impl<F>(cx: &mut Context, extend_fn: F)
 where
     F: Fn(RopeSlice, Range, usize) -> Range,

helix-term/src/keymap.rs

@@ -512,6 +512,7 @@ impl Default for Keymaps {
             "g" => { "Goto"
                 "g" => goto_file_start,
                 "e" => goto_last_line,
+                "f" => goto_file,
                 "h" => goto_line_start,
                 "l" => goto_line_end,
                 "s" => goto_first_nonwhitespace,
@@ -622,6 +623,8 @@ impl Default for Keymaps {
                 "C-w" | "w" => rotate_view,
                 "C-s" | "s" => hsplit,
                 "C-v" | "v" => vsplit,
+                "f" => goto_file_hsplit,
+                "F" => goto_file_vsplit,
                 "C-q" | "q" => wclose,
                 "C-o" | "o" => wonly,
                 "C-h" | "h" | "left" => jump_view_left,
@@ -650,6 +653,8 @@ impl Default for Keymaps {
                     "C-w" | "w" => rotate_view,
                     "C-s" | "s" => hsplit,
                     "C-v" | "v" => vsplit,
+                    "f" => goto_file_hsplit,
+                    "F" => goto_file_vsplit,
                     "C-q" | "q" => wclose,
                     "C-o" | "o" => wonly,
                     "C-h" | "h" | "left" => jump_view_left,