Atom selection mode feature

atom-selection-mode.md

This is a hand-rolled alternative to the plugin https://github.com/jeffgran/atom-selection-mode.

My two major requests which that plugin doesn't support are:

1. Do not deselect when tabbing
2. Have an indicator when selection mode is on

My version does both these and is a bit simpler, but also less versatile/general. But it fills my need, and maybe someone else's too.

To get it to work, just paste the bits in the relevant files. Maybe I'll package it into a plugin one day.

init.coffee

# Toggle selection mode by adding class to current editor
atom.commands.add 'atom-text-editor', 'editor:toggle-selection-mode', ->
  return unless editor = atom.workspace.getActiveTextEditor()
  view = atom.views.getView(editor)
  view.classList.toggle("selection-mode")

keymap.cson

# Toggle selection mode
'atom-workspace atom-text-editor':
  'ctrl-space': 'editor:toggle-selection-mode'

# When in selection mode, override cursor movements
'atom-workspace atom-text-editor.selection-mode':
  'ctrl-n': 'core:select-down'
  'ctrl-p': 'core:select-up'
  'ctrl-f': 'core:select-right'
  'ctrl-b': 'core:select-left'
  'down': 'core:select-down'
  'up': 'core:select-up'
  'right': 'core:select-right'
  'left': 'core:select-left'

styles.less

// Show indicator when selection-mode is on (optional)
atom-text-editor.selection-mode::after {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  content: 'Ι';
  color: fadeout(@text-color-warning, 20%);
  font-size: 2rem;
}