MultiEditUtils.py

import sublime, sublime_plugin
import re
from collections import namedtuple

class MultiFindAllCommand(sublime_plugin.TextCommand):

  def run(self, edit):

    view = self.view
    newRegions = []

    for region in view.sel():
      substr = view.substr(region)
      for region in view.find_all(substr, sublime.LITERAL):
        newRegions.append(region)

    for region in newRegions:
      view.sel().add(region)


class JumpToLastRegionCommand(sublime_plugin.TextCommand):

  def run(self, edit):

    selection = self.view.sel()
    lastRegion = selection[-1]
    cursorPosition = lastRegion.b
    selection.clear()
    selection.add(sublime.Region(cursorPosition))
    self.view.show(cursorPosition, False)


class AddLastSelectionCommand(sublime_plugin.TextCommand):

  def run(self, edit):

    helper = Helper.getOrConstructHelperForView(self.view)
    lastSelections = helper.lastSelections

    if len(lastSelections) < 1:
      return

    currentSelection = self.view.sel()
    oldSelectionHash = Helper.hashSelection(currentSelection)

    for region in lastSelections[-1]:
      helper.ignoreSelectionCommand = True
      currentSelection.add(region)

    newSelectionHash = Helper.hashSelection(currentSelection)

    lastSelections.pop(-1)

    nothingChanged = oldSelectionHash == newSelectionHash
    if nothingChanged:
      # Rerun if the previous selection was only a subset of the current selection.
      self.run(edit)


class CycleThroughRegionsCommand(sublime_plugin.TextCommand):

  def run(self, edit):

    view = self.view
    visibleRegion = view.visible_region()
    selectedRegions = view.sel()

    if not len(selectedRegions):
      return

    nextRegion = None

    # Find the first region which comes after the visible region.
    for region in selectedRegions:
      if region.end() > visibleRegion.b:
        nextRegion = region
        break

    # If the last region in the buffer was reached, take the first region.
    # Empty regions will be evaluated falsy, which is why short-circuit evaluation doesn't work here.
    if nextRegion is None:
      nextRegion = selectedRegions[0]

    view.show(nextRegion, False)



class NormalizeRegionEndsCommand(sublime_plugin.TextCommand):

  def run(self, edit):

    view = self.view
    selection = view.sel()

    if not len(selection):
      return

    if self.areRegionsNormalized(selection):
      regions = self.invertRegions(selection)
    else:
      regions = self.normalizeRegions(selection)

    selection.clear()
    for region in regions:
      selection.add(region)

    firstVisibleRegion = self.findFirstVisibleRegion()
    if firstVisibleRegion is not None:
      # if firstVisibleRegion won't work with empty regions
      view.show(firstVisibleRegion.b, False)


  def findFirstVisibleRegion(self):

    visibleRegion = self.view.visible_region()

    for region in self.view.sel():
      if region.intersects(visibleRegion):
        return region

    return None


  def normalizeRegions(self, regions):

    return self.invertRegions(regions, lambda region: region.a > region.b)


  def invertRegions(self, regions, condition = lambda region: True):

    invertedRegions = []

    for region in regions:
      invertedRegion = region
      if condition(region):
        invertedRegion = sublime.Region(region.b, region.a)

      invertedRegions.append(invertedRegion)

    return invertedRegions


  def areRegionsNormalized(self, regions):

    return all(region.a < region.b for region in regions)



class SplitSelectionCommand(sublime_plugin.TextCommand):

  def run(self, edit, separator = None):

    self.savedSelection = [r for r in self.view.sel()]

    selectionSize = sum(map(lambda region: region.size(), self.savedSelection))
    if selectionSize == 0:
      # nothing to do
      sublime.status_message("Cannot split an empty selection.")
      return

    if separator != None:
      self.splitSelection(separator)
    else:
      onConfirm, onChange = self.getHandlers()

      inputView = sublime.active_window().show_input_panel(
        "Separating character(s) for splitting the selection",
        " ",
        onConfirm,
        onChange,
        self.restoreSelection
      )

      inputView.run_command("select_all")


  def getHandlers(self):

    settings = sublime.load_settings("MultiEditUtils.sublime-settings")
    live_split_selection = settings.get("live_split_selection")

    if live_split_selection:
      onConfirm = None
      onChange = self.splitSelection
    else:
      onConfirm = self.splitSelection
      onChange = None

    return (onConfirm, onChange)


  def restoreSelection(self):

    selection = self.view.sel()
    selection.clear()
    for region in self.savedSelection:
      selection.add(region)

    self.workaroundForRefreshBug(self.view, selection)


  def splitSelection(self, separator):

    view = self.view
    newRegions = []

    for region in self.savedSelection:
      currentPosition = region.begin()
      regionString = view.substr(region)

      if separator:
        subRegions = regionString.split(separator)
      else:
        # take each character separately
        subRegions = list(regionString)

      for subRegion in subRegions:
        newRegion = sublime.Region(
          currentPosition,
          currentPosition + len(subRegion)
        )
        newRegions.append(newRegion)
        currentPosition += len(subRegion) + len(separator)

    selection = view.sel()
    selection.clear()
    for region in newRegions:
      selection.add(region)

    self.workaroundForRefreshBug(view, selection)


  def workaroundForRefreshBug(self, view, selection):
    # work around sublime bug with caret position not refreshing
    # see: https://github.com/code-orchestra/colt-sublime-plugin/commit/9e6ffbf573fc60b356665ff2ba9ced614c71120f

    bug = [s for s in selection]
    view.add_regions("bug", bug, "bug", "dot", sublime.HIDDEN | sublime.PERSISTENT)
    view.erase_regions("bug")



Case = namedtuple("Case", "lower upper capitalized mixed")(1, 2, 3, 4)
StringMetaData = namedtuple("StringMetaData", "separator cases stringGroups")


class PreserveCaseCommand(sublime_plugin.TextCommand):

  def run(self, edit, newString = None):

    self.edit = edit
    self.savedSelection = [r for r in self.view.sel()]

    selectionSize = sum(map(lambda region: region.size(), self.savedSelection))
    if selectionSize == 0:
      sublime.status_message("Cannot run preserve case on an empty selection.")
      return

    if newString != None:
      self.preserveCase(newString)
    else:
      firstRegionString = self.view.substr(self.savedSelection[0])
      inputView = sublime.active_window().show_input_panel(
        "New string for preserving case",
        firstRegionString,
        self.runPreserveCase,
        None,
        None
      )
      inputView.run_command("select_all")


  def runPreserveCase(self, newString):

    self.view.run_command("preserve_case", {"newString": newString})


  def preserveCase(self, newString):

    view = self.view
    regionOffset = 0
    newStringGroups = self.analyzeString(newString).stringGroups

    for region in self.savedSelection:
      region = sublime.Region(region.begin() + regionOffset, region.end() + regionOffset)
      regionString = view.substr(region)

      newRegionString = self.replaceStringWithCase(regionString, newStringGroups)
      view.replace(self.edit, region, newRegionString)
      regionOffset += len(newRegionString) - len(regionString)


  def analyzeString(self, aString):

    separators = "-_/. "
    counts = list(map(lambda sep: aString.count(sep), separators))
    maxCounts = max(counts)

    if max(counts) > 0:
      separator = separators[counts.index(maxCounts)]
      stringGroups = aString.split(separator)
    else:
      # no real separator
      separator = ""
      stringGroups = self.splitByCase(aString)

    cases = list(map(self.analyzeCase, stringGroups))

    return StringMetaData(separator, cases, stringGroups)


  def splitByCase(self, aString):

    # split at the change from lower to upper case (or vice versa)
    # groups = re.split('(?<!^)((?:[^A-Z][A-Z])|(?:[A-Z]{2,}[^A-Z]))', aString)
    groups = re.split('(?<!^)((?:[^A-Z][^a-z])|(?:[^a-z][^A-Z]))', aString)
    newGroups = [groups[0]]
    for index, group in enumerate(groups):
      if index % 2 == 1:
        newGroups[-1] += group[0:-1]
        newGroups.append(group[-1] + groups[index + 1])

    return newGroups


  def analyzeCase(self, aString):

    lowerReg = re.compile("^[^A-Z]*$")
    upperReg = re.compile("^[^a-z]*$")
    capitalizedReg = re.compile("^[A-Z]([^A-Z])*$")

    if lowerReg.match(aString):
      return Case.lower
    elif upperReg.match(aString):
      return Case.upper
    elif capitalizedReg.match(aString):
      return Case.capitalized
    else:
      return Case.mixed


  def replaceStringWithCase(self, oldString, newStringGroups):

    analyzedOldString = self.analyzeString(oldString)
    oldCases = analyzedOldString.cases
    oldSeparator = analyzedOldString.separator

    for index, currentElement in enumerate(newStringGroups):
      # If the user provides more new strings than old ones are given, we just
      # repeat the last case.
      clampedIndex = min(index, len(oldCases) - 1)
      currentCase = oldCases[clampedIndex]

      if currentCase == Case.upper:
        newStringGroups[index] = currentElement.upper()
      elif currentCase == Case.lower:
        newStringGroups[index] = currentElement.lower()
      elif currentCase == Case.capitalized:
        newStringGroups[index] = currentElement.capitalize()

    return oldSeparator.join(newStringGroups)



class StripSelection(sublime_plugin.TextCommand):

  def run(self, edit):

    newRegions = []
    selection = self.view.sel()

    for currentRegion in selection:

      text = self.view.substr(currentRegion)

      lStrippedText = text.lstrip()
      rStrippedText = lStrippedText.rstrip()

      lStrippedCount = len(text) - len(lStrippedText)
      rStrippedCount = len(lStrippedText) - len(rStrippedText)

      a = currentRegion.begin() + lStrippedCount
      b = currentRegion.end() - rStrippedCount

      if a == b:
        # the region only contained whitespace
        # use the old selection end to avoid jumping of cursor
        a = b = currentRegion.b

      newRegions.append(sublime.Region(a, b))


    selection.clear()
    for region in newRegions:
      selection.add(region)



class RemoveEmptyRegions(sublime_plugin.TextCommand):

  def run(self, edit):

    selection = self.view.sel()
    regions = list(selection)
    newRegions = list(filter(lambda r: not r.empty(), regions))

    if len(newRegions) == 0:
      sublime.status_message("There are only empty regions. Removing those would remove all regions. Aborting.")
      return

    selection.clear()
    for r in newRegions:
      selection.add(r)



class SelectionListener(sublime_plugin.EventListener):

  def on_selection_modified(self, view):

    helper = Helper.getOrConstructHelperForView(view)
    lastSelections = helper.lastSelections

    if helper.ignoreSelectionCommand:
      helper.ignoreSelectionCommand = False
      return

    currentSelection = view.sel()

    if self.isComplexSelection(currentSelection):

      currentRegions = list(currentSelection)
      selectionWasExpanded = lastSelections and self.isSubsetOf(currentSelection, lastSelections[-1])

      if selectionWasExpanded:
        # Override the last entry since the selection was expanded.
        lastSelections[-1] = currentRegions
      else:
        lastSelections.append(currentRegions)


  def isComplexSelection(self, selection):
    # A "complex selection" is a selection which is not empty or has multiple regions.

    regionCount = len(selection)

    if not regionCount:
      return False

    firstRegionLength = len(selection[0])

    return regionCount > 1 or firstRegionLength > 0


  def isSubsetOf(self, selectionA, selectionB):
    # Check if selectionA is a subset of selectionB.

    return all(selectionA.contains(region) for region in selectionB)



class TriggerSelectionModifiedCommand(sublime_plugin.TextCommand):

  def run(self, edit):

    SelectionListener().on_selection_modified(self.view)



class Helper:

  viewToHelperMap = {}

  def __init__(self):

    # The SelectionCommand should be ignored if it was triggered by AddLastSelectionCommand.
    self.ignoreSelectionCommand = False
    self.lastSelections = []


  @staticmethod
  def getOrConstructHelperForView(view):

    mapping = Helper.viewToHelperMap
    viewID = view.id()

    if not viewID in mapping.keys():
      mapping[viewID] = Helper()

    helper = mapping[viewID]
    return helper


  @staticmethod
  def hashSelection(selection):

    return str(list(selection))