Fix expand all under cursor and add docs

DOCS.md

@@ -221,13 +221,18 @@ Next commands available in interactive mode:
 |             Key               |         Command         |
 |-------------------------------|-------------------------|
 | `q` or `Esc` or `Ctrl`+`c`    | Exit                    |
-| `e`/`E`                       | Expand/Collapse all     |
-| `g`/`G`                       | Goto top/bottom         |
-| `up`/`down` or `k/j`          | Move cursor up/down     |
-| `left`/`right` or `h/l`       | Expand/Collapse         |
+| `up` or `k`                   | Move cursor up          |
+| `down` or `j`                 | Move cursor down        |
+| `left` or `h`                 | Collapse                |
+| `right` or `l`                | Expand                  |
+| `Shift`+`right` or `L`        | Expand all under cursor | 
+| `e`                           | Expand all              |
+| `E`                           | Collapse all            |
+| `g`                           | Scroll to top           |
+| `G`                           | Scroll to bottom        |
 | `.`                           | Edit filter             |
 | `/`                           | Search                  |
-| `n`                           | Goto next found pattern |
+| `n`                           | Find next               |
 
 These commands are available when editing the filter:
 

fx.js

@@ -350,7 +350,7 @@ module.exports = function start(filename, source) {
     program.showCursor()
     program.cursorPos(program.y, line.search(/\S/))
     const path = index.get(n)
-    const subJson = reduce(json, path)
+    const subJson = reduce(json, 'this' + path)
     for (let p of dfs(subJson, path)) {
       if (expanded.size < 1000) {
         expanded.add(p)
@@ -398,22 +398,6 @@ module.exports = function start(filename, source) {
     }
   })
 
-  // Collapse all under cursor.
-  box.key(['S-left', 'S-h'], function () {
-    hideStatusBar()
-    const [n, line] = getLine(program.y)
-    program.showCursor()
-    program.cursorPos(program.y, line.search(/\S/))
-    const path = index.get(n)
-    const subJson = reduce(json, path)
-    for (let p of dfs(subJson, path)) {
-      if (expanded.has(p)) {
-        expanded.delete(p)
-      }
-    }
-    render()
-  })
-
   box.on('click', function (mouse) {
     hideStatusBar()
     const [n, line] = getLine(mouse.y)

index.js

@@ -30,6 +30,21 @@ const usage = `
   Usage
     $ fx [code ...]
 
+  Shortcuts
+    q or Esc or Ctrl+c    Exit                   
+    up or k               Move cursor up         
+    down or j             Move cursor down       
+    left or h             Collapse               
+    right or l            Expand                 
+    Shift+right or L      Expand all under cursor
+    e                     Expand all             
+    E                     Collapse all           
+    g                     Scroll to top          
+    G                     Scroll to bottom       
+    .                     Edit filter            
+    /                     Search                 
+    n                     Find next                  
+
   Examples
     $ echo '{"key": "value"}' | fx 'x => x.key'
     value