1# This file is a minimal clang-format sublime-integration. To install:
2# - Change 'binary' if clang-format is not on the path (see below).
3# - Put this file into your sublime Packages directory, e.g. on Linux:
4#     ~/.config/sublime-text-2/Packages/User/clang-format-sublime.py
5# - Add a key binding:
6#     { "keys": ["ctrl+shift+c"], "command": "clang_format" },
7#
8# With this integration you can press the bound key and clang-format will
9# format the current lines and selections for all cursor positions. The lines
10# or regions are extended to the next bigger syntactic entities.
11#
12# It operates on the current, potentially unsaved buffer and does not create
13# or save any files. To revert a formatting, just undo.
14
15from __future__ import print_function
16import sublime
17import sublime_plugin
18import subprocess
19
20# Change this to the full path if clang-format is not on the path.
21binary = 'clang-format'
22
23# Change this to format according to other formatting styles. See the output of
24# 'clang-format --help' for a list of supported styles. The default looks for
25# a '.clang-format' or '_clang-format' file to indicate the style that should be
26# used.
27style = 'file'
28
29class ClangFormatCommand(sublime_plugin.TextCommand):
30  def run(self, edit):
31    encoding = self.view.encoding()
32    if encoding == 'Undefined':
33      encoding = 'utf-8'
34    regions = []
35    command = [binary, '-style', style]
36    for region in self.view.sel():
37      regions.append(region)
38      region_offset = min(region.a, region.b)
39      region_length = abs(region.b - region.a)
40      command.extend(['-offset', str(region_offset),
41                      '-length', str(region_length),
42                      '-assume-filename', str(self.view.file_name())])
43    old_viewport_position = self.view.viewport_position()
44    buf = self.view.substr(sublime.Region(0, self.view.size()))
45    p = subprocess.Popen(command, stdout=subprocess.PIPE,
46                         stderr=subprocess.PIPE, stdin=subprocess.PIPE)
47    output, error = p.communicate(buf.encode(encoding))
48    if error:
49      print(error)
50    self.view.replace(
51        edit, sublime.Region(0, self.view.size()),
52        output.decode(encoding))
53    self.view.sel().clear()
54    for region in regions:
55      self.view.sel().add(region)
56    # FIXME: Without the 10ms delay, the viewport sometimes jumps.
57    sublime.set_timeout(lambda: self.view.set_viewport_position(
58      old_viewport_position, False), 10)
59