Sublime plugin for incrementing and decrementing numbers in selections.

IncrementSelection.py

import sublime, sublime_plugin, re

def updateSelection(command, edit, delta, preserveLength):
  rd = re.compile(r'\d+')
  value = -delta
  originalLength = 1
  if (delta < 0):
    value = len(command.view.sel()) * -delta
  selCountLength = 1;
  selectionCount = len(command.view.sel())
  while selectionCount > 10:
    selectionCount /= 10
    selCountLength += 1
  for selection in command.view.sel():
    selectionText = command.view.substr(selection);
    matches = list(rd.finditer(selectionText))
    if (len(matches) > 0):
      for match in reversed(matches):
        matchText = match.group(0)
        originalLength = len(matchText)
        value = int(matchText) + delta
        if value < 0:
          value = 0
        valueText = str(value)
        if (preserveLength):
          valueText = valueText.zfill(originalLength)
        selectionText = (selectionText[:match.start(0)] +
                         valueText +
                         selectionText[match.end(0):])
      command.view.replace(edit, selection, selectionText)
    else:
      # insert a number that is previous value+delta at end of selection.
      value += delta
      if value < 0:
        value = 0
      valueText = str(value)
      if preserveLength:
        valueText = valueText.zfill(max(originalLength, selCountLength))
      command.view.replace(edit, selection, selectionText + valueText)

class IncrementSelectionCommand(sublime_plugin.TextCommand):
  def run(self, edit):
    updateSelection(self, edit, 1, False)

class DecrementSelectionCommand(sublime_plugin.TextCommand):
  def run(self, edit):
    updateSelection(self, edit, -1, False)

class IncrementSelectionPreserveLengthCommand(sublime_plugin.TextCommand):
  def run(self, edit):
    updateSelection(self, edit, 1, True)

class DecrementSelectionPreserveLengthCommand(sublime_plugin.TextCommand):
  def run(self, edit):
    updateSelection(self, edit, -1, True)

# Add to User keymap:
#    { "keys": ["ctrl+keypad_plus"],  "command": "increment_selection" },
#    { "keys": ["ctrl+keypad_minus"], "command": "decrement_selection" },
#    { "keys": ["shift+ctrl+keypad_plus"],
#      "command": "increment_selection_preserve_length" },
#    { "keys": ["shift+ctrl+keypad_minus"],
#      "command": "decrement_selection_preserve_length" }