Actions Tree

This plugin enables Emacs which-key style keymapping in IntelliJ-based IDEs, allowing you to define a list of actions to show in a popup. An action in the list can be a further action list to show when invoked, or an ordinary IDE action. Each action in the list can be assigned a keyboard shortcut that is local to the list, doesn't conflict with other global shortcuts.

Configuration

Configuration is done via a JSON file, once you've written your it, set the path to it under Preferences | Keymap | Actions Tree.

Use the menu item Tools | Actions Tree | Export IDE Actions to export the ID to name mappings of all your IDE actions, when you need to lookup the ID of an action to reference in the configuration file.

The following is an example Emacs like configuration:

{
  "items": [
    { "keys": ["ctrl alt BACK_SLASH"], "id": "ReformatCode" },
    {
      "keys": ["ctrl alt BACK_SLASH"],
      "id": "Haskell.ReformatCode",
      "when": "FileExtension:hs"
    },
    {
      "keys": ["ctrl alt BACK_SLASH"],
      "id": "Cargo.RustfmtFile",
      "when": "FileExtension:rs"
    },
    {
      "keys": ["EQUALS"],
      "id": "CompareTwoFiles",
      "when": { "all": ["ToolWindowActive:.*", "!InputFocused"] }
    },
    {
      "keys": ["ctrl X"],
      "items": [
        { "keys": ["ctrl F"], "id": "GotoFile" },
        { "keys": ["ctrl B", "B"], "id": "RecentFiles" },
        { "keys": ["K", "0"], "id": "CloseContent", "separator-above": "" },
        { "keys": ["1"], "id": "UnsplitAll" },
        { "keys": ["2"], "id": "SplitHorizontally" },
        { "keys": ["3"], "id": "SplitVertically" },
        { "keys": ["O"], "id": "NextSplitter" },
        { "keys": ["H"], "id": "$SelectAll", "separator-above": "" },
        { "keys": ["ctrl C"], "id": "Exit", "separator-above": "" }
      ]
    },
    {
      "keys": ["alt S"],
      "items": [
        { "keys": ["typed ."], "id": "Find" },
        { "keys": ["alt typed %"], "id": "Replace" },
        {
          "keys": ["H"],
          "separator-above": "",
          "name": "Highlight...",
          "items": [
            { "keys": ["typed ."], "id": "HighlightUsagesInFile" },
            {
              "keys": ["N"],
              "id": "GotoNextElementUnderCaretUsage",
              "sticky": true
            },
            {
              "keys": ["P"],
              "id": "GotoPrevElementUnderCaretUsage",
              "sticky": true
            }
          ]
        }
      ]
    }
  ]
}

With the above example configuration, typing ctrl X will show a popup containing its items, then typing h will invoke the $SelectAll action.

The basic structures are:

1. Action Group - defines a custom group of actions:

   {
     "id": "...",
     "keys": [],
     "name": "...",
     "when": "...",
     "separator-above": "...",
     "items": []
   }

   • id: (optional) specify your own ID for this action group if you want to reference it somewhere, such as from your IdeaVim config via the :action command.

   • keys: (optional) typing any of these key strokes while the parent popup is showing will invoke this action, for the format see JDK's KeyStroke class.

     Basic format is modifiers <KEY>.

     Where modifiers can be one or more of: shift, control, ctrl, meta, alt, altGraph.

     And <KEY> can be one of:

     • Any upper case constants prefixed with VK_ in the KeyEvent class. But you need to specify the name of the constant without the VK_ prefix.

     • typed <CHAR> where <CHAR> is the unicode character to be typed, case sensitive.

   • name: (optional) name to display in the popup.

   • when: (optional) only execute this action under this condition. Its value can be:

     • FileExtension:<regex>: file extension matches <regex>, e.g. FileExtension:java.

     • ToolWindowActive:<regex>: active tool window name matches <regex>, e.g. ToolWindowActive:Project.

     • ToolWindowTabActive:<regex>: active tool window's active tab title matches <regex>, e.g. ToolWindowTabActive:Log.

     • InputFocused: an input editor or field is in focus.

     • TextSelected: a text component is in focus and has text selected.

     • PathExists:<path>: checks the given path exists, can be an absolute path or a relative path, if it's a relative path, it will be resolved against the project's base path.

     • !<expression>: ! negates a condition, e.g. !InputFocused.

     • { "all": [...] }: evaluates to true when all values are true. Each value in the array must be one of the values in this list.

     • { "any": [...] }: evaluates to true when at least one of the values is true. Each value in the array must be one of the values in this list.

     When different actions are registered to the same key strokes with different when values, the last whose when evaluates to true at invocation time will be executed.

   • separator-above: (optional) inserts this string separator above this item in the popup, empty for a line separator

   • items: (required) sub-actions to show in a popup when this action is invoked, each item can be an action group or an action reference.

2. Action Reference - references an existing IDE action:

   {
     "keys": [],
     "when": "...",
     "separator-above": "...",
     "sticky": false,
     "id": "..."
   }

   • keys: same as above

   • when: same as above

   • separator-above: same as above

   • stick: if an action is sticky, invoking it will not dismiss the popup, allowing you to repeat the action again or invoke other actions on the popup.

   • id: (required) the ID of an existing action to invoke. To find the ID of an action, use Tools | Actions Tree | Export IDE Actions to export the ID to name mappings of all your IDE actions.

The top level actions will be registered as global actions in the keymap (can be seen under Preferences | Keymap | Plug-ins | Actions Tree) so they can be invoked anywhere, so be sure to check your keymap to make sure their keys don't conflict with other actions.

Any change to the configuration file can be reloaded via Tools | Actions Tree | Reload.

Building

To build the plugin, run ./gradlew clean build, then build/distributions/intellij-actions-tree-xxx.zip will be created. It can be installed by going to the IntelliJ's plugins settings, and choose install from disk.