My keymap.cson for Atom Editor

init.coffee

add_line_markers = (marker) ->
  editor = atom.workspace.getActiveTextEditor()
  range = editor.getSelectedBufferRange()
  editor.moveToBeginningOfLine()
  s = range.start.row
  e = range.end.row
  if e > s && range.end.column == 0
    e = e - 1
    editor.moveUp()
  editor.transact ->
    for i in [s..e]
      do (i) ->
        editor.moveToBeginningOfLine()
        editor.insertText(marker + ": ")
        if i < e
          editor.moveUp()

remove_line_markers = () ->
  editor = atom.workspace.getActiveTextEditor()
  range = editor.getSelectedBufferRange()
  editor.moveToBeginningOfLine()
  s = range.start.row
  e = range.end.row
  if e > s && range.end.column == 0
    e = e - 1
    editor.moveUp()
  editor.transact ->
    for i in [s..e]
      do (i) ->
        editor.moveToBeginningOfLine()
        editor.selectRight(6)
        editor.backspace()
        if i < e
          editor.moveUp()

toggle_line_marker = () ->
  editor = atom.workspace.getActiveTextEditor()
  editor.moveToBeginningOfLine()
  editor.selectRight(1)
  char = editor.getSelectedText()
  switch char
    when "  " then editor.insertText("+ ")
    when " " then editor.insertText("+")
    when "+" then editor.insertText("-")
    when "-" then editor.insertText(" ")
  editor.moveToBeginningOfLine()

atom.commands.add 'atom-text-editor',
  'custom:insert-review-tag': ->
    editor = atom.workspace.getActiveTextEditor()
    selectedText = editor.getSelectedText()
    editor?.insertText("@<>{#{selectedText}}")
    editor?.moveLeft(selectedText.length + 3)
  'custom:insert-review-content-tag': ->
    editor = atom.workspace.getActiveTextEditor()
    editor?.moveToBeginningOfLine()
    editor?.insertText("//{\n\n//}\n")
    editor?.moveUp(3)
    editor?.moveRight(2)
  'custom:add-review-line-markers': ->
    add_line_markers("    ")
  'custom:add-review-line-markers-plus': ->
    add_line_markers("+   ")
  'custom:add-review-line-markers-minus': ->
    add_line_markers("-   ")
  'custom:remove-review-line-markers': ->
    remove_line_markers()
  'custom:toggle-review-line-marker': ->
    toggle_line_marker()

keymap.cson

'atom-workspace':
  'alt-p': 'project-manager:list-projects'
  'alt-w': 'tabs:close-all-tabs'

'atom-workspace atom-text-editor:not([mini])':
  'ctrl-up': 'core:move-up'
  'ctrl-down': 'core:move-down'
'atom-text-editor':
  'ctrl-shift-space': 'autocomplete-plus:activate'
  'ctrl-i': 'editor:select-word'
  'ctrl-n': 'bookmarks:view-all'
  'alt-n': 'bookmarks:toggle-bookmark'
  'ctrl-alt-n': 'bookmarks:clear-bookmarks'
  'alt-up': 'bookmarks:jump-to-previous-bookmark'
  'alt-down': 'bookmarks:jump-to-next-bookmark'
  'ctrl-alt-i': 'custom:insert-review-tag'
  'ctrl-alt-u': 'custom:insert-review-content-tag'
  'ctrl-alt-y': 'custom:toggle-review-line-marker'
  'ctrl-alt-g': 'custom:remove-review-line-markers'
  'ctrl-alt-k': 'custom:add-review-line-markers'
  'ctrl-alt-j': 'custom:add-review-line-markers-plus'
  'ctrl-alt-m': 'custom:add-review-line-markers-minus'
'.platform-win32 atom-text-editor, .platform-linux atom-text-editor':
  'ctrl-d': 'editor:delete-line'
  'ctrl-shift-B': 'unset!'
  'ctrl-k ctrl-c': 'change-case:camel'
  'ctrl-k ctrl-s': 'change-case:snake'