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#+TITLE: Treemacs layer
[[file:img/treemacs.png]]
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* Table of Contents :TOC_4_gh:noexport:
- [[#description][Description]]
- [[#features][Features:]]
- [[#install][Install]]
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- [[#configuration][Configuration]]
- [[#follow-mode][Follow mode]]
- [[#file-watch][File watch]]
- [[#collapsed-directories][Collapsed directories]]
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- [[#key-bindings][Key Bindings]]
- [[#global][Global]]
- [[#inside-treemacs][Inside Treemacs]]
* Description
This layer brings in [[https://github.com/Alexander-Miller/treemacs][Treemacs]] to replace Neotree as the default file and project
explorer:
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** Features:
An detailed overview over Treemacs' available features is available in [[https://github.com/Alexander-Miller/treemacs#detailed-feature-list][its
readme]]. In a short summary Treemacs offers the following:
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- Simple and powerful navigation and ability to detail exactly how and where a
file should be opened
- Good looking png icons.
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- Display of multiple file trees organized as projects residing in a workpsace.
- Ability to show tags contained in files. Tags are provided by imenu, so
nearly every filetype is supported.
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- Mouse interface for single and double left clicks in line with modern GUI standards.
(Clicking on an icon will also display a file's tags)
- Locational awareness: commands like ~find-file~ or ~magit-status~ will use the location
of the node at point (with $HOME as fallback)
- Optionally fontifying files based on their git status.
- Optionally collapsing single-dir-child directories into one.
- Doing both asynchronously for an imperceptible performance cost.
- Optional =follow-mode= to automatically focus the currently selected file.
- Optional =filewatch-mode= to automatically refresh the view after (and only
after) changes to the shown filesystem.
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* Install
To use this layer, add =treemacs= to the existing
=dotspacemacs-configuration-layers= in your =dotspacemacs= file.
* Configuration
** Follow mode
To have treemacs automatically sync with your current buffer set the
layer variable =treemacs-use-follow-mode= to non-nil.
#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers '(
(treemacs :variables treemacs-use-follow-mode t)))
#+END_SRC
Default value is =t=.
** File watch
To automatically refresh the Treemacs buffer when there is a change in the
part of the file system shown by treemacs set the layer variable
=treemacs-use-filewatch-mode= to non-nil.
#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers '(
(treemacs :variables treemacs-use-filewatch-mode t)))
#+END_SRC
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Default value is =t=.
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** Collapsed directories
*This feature requires python to be installed*.
Treemacs tries to collapse empty directory names into one name. It is possible
to control how deep Treemacs will search for empty directories by settings the
layer variable =treemacs-use-collapsed-directories= to a positive number.
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#+BEGIN_SRC emacs-lisp
(setq-default dotspacemacs-configuration-layers '(
(treemacs :variables treemacs-use-collapsed-directories 3)))
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#+END_SRC
Default value is 3 (or 0 when python is not installed).
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* Key Bindings
** Global
| Key Binding | Description |
|-------------+------------------------------------------------------------------------------------------------------------------------------------------------|
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| ~M-0~ | Selected the treemacs window. Actually selects window #10, which is always assigned to treemacs. |
| ~SPC 0~ | Open treemacs in the current directory. When not visiting a file use $HOME as fallback. With a prefix arg manually select the root instead. |
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| ~SPC f B~ | Find and select a bookmark. If it cannot be found rebuild view with the bookmark's location as root. Also open the bookmark with a prefix arg. |
| ~SPC f t~ | Hide/show existing treemacs buffer. Create one for the current directory if no buffer exists. |
| ~SPC f T~ | Manually focus the treemacs view on the currently selected file. Not needed when =treemacs-follow-mode= is enabled. |
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| ~SPC f M-t~ | Manually focus the treemacs view on the currently selected file and tag. |
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** Inside Treemacs
Treemacs will use either ~j/k~ or ~n/p~ to go to the next/previous line,
depending on whether vim/hybrid editing style is used. Likewise refresh is only
bound to g when emacs editing style is used, since under vim g is a prefix for
many other commands.
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| Key Binding | Description |
|-------------+----------------------------------------------------------------------------------------------------------------|
| ~?~ | Summon the helpful hydra to show you the treemacs keymap. |
| ~M-j/M-n~ | Select next node at the same depth as currently selected node, if possible. |
| ~j/n~ | Goto next line. |
| ~k/p~ | Goto previous line. |
| ~M-J/N~ | Go to the next line in ~next-window~. |
| ~M-K/P~ | Go to the previous line in ~next-window~.. |
| ~M-j/M-n~ | Select next node at the same depth as currently selected node, if possible. |
| ~M-k/M-p~ | Select previous node at the same depth as currently selected node, if possible. |
| ~C-p a~ | Select a new project to add to the treemacs workspace. |
| ~C-p p~ | Select a projectile project to add to the workspace. |
| ~C-p d~ | Remove project at point from the workspace. |
| ~C-p r~ | Rename project at point. |
| ~th~ | Toggle the hiding and displaying of dotfiles. |
| ~tw~ | Toggle whether the treemacs buffer should have a fixed width. |
| ~tf~ | Toggle treemacs-follow-mode. |
| ~ta~ | treemacs-filewatch-mode. |
| ~w~ | Set a new value for the width of the treemacs window. |
| ~TAB~ | Do what I mean (as defined in ~treemacs-TAB-actions-config~). Prefers expanding nodes by default. |
| ~RET~ | Do what I mean (as defined in ~treemacs-RET-actions-config~). Prefers visiting nodes by default. |
| ~mouse1~ | Move point to clicked line |
| ~2x mouse1~ | Do what I mean (as defined in ~treemacs-doubleclick-actions-config~). Behavious like ~RET~ by default. |
| ~g/r/gr~ | Refresh and rebuild the treemacs buffer. |
| ~d~ | Delete node at point. A delete action must always be confirmed. Directories are deleted recursively. |
| ~cf~ | Create a file. |
| ~cd~ | Create a directory. |
| ~R~ | Rename the currently selected node. Reload buffers visiting renamed files or files in renamed direcotries. |
| ~u~ | Select parent of selected node, if possible. |
| ~q~ | Hide/show an existing treemacs buffer. |
| ~Q~ | Kill the treemacs buffer. |
| ~ov~ | Open current file or tag by vertically splitting ~next-window~. |
| ~oh~ | Open current file or tag by horizontally splitting ~next-window~. |
| ~oo~ | Open current file or tag, performing no split and using ~next-window~ directly. |
| ~oaa~ | Open current file or tag, using ace-window to decide which window to open the file in. |
| ~oah~ | Open current file or tag by horizontally splitting a window selected by ace-window. |
| ~oav~ | Open current file or tag by vertically splitting a window selected by ace-window. |
| ~ox~ | Open current file according to its mime type in an external application. Linux, Windows and Mac are supported. |
| ~ta~ | Toggle ~treemacs-filewatch-mode~. |
| ~tf~ | Toggle ~treemacs-follow-mode~. |
| ~th~ | Toggle the hiding and displaying of dotfiles. |
| ~tw~ | Toggle whether the treemacs buffer should have a fixed width. |
| ~yr~ | Copy the absolute path of the nearest project node at point. |
| ~yy~ | Copy the absolute path of the node at point. |