1 # This file is a minimal clang-format vim-integration. To install: 2 # - Change 'binary' if clang-format is not on the path (see below). 3 # - Add to your .vimrc: 4 # 5 # map <C-I> :pyf <path-to-this-file>/clang-format.py<CR> 6 # imap <C-I> <ESC>:pyf <path-to-this-file>/clang-format.py<CR>i 7 # 8 # The first line enables clang-format for NORMAL and VISUAL mode, the second 9 # line adds support for INSERT mode. Change "C-I" to another binding if you 10 # need clang-format on a different key (C-I stands for Ctrl+i). 11 # 12 # With this integration you can press the bound key and clang-format will 13 # format the current line in NORMAL and INSERT mode or the selected region in 14 # VISUAL mode. The line or region is extended to the next bigger syntactic 15 # entity. 16 # 17 # It operates on the current, potentially unsaved buffer and does not create 18 # or save any files. To revert a formatting, just undo. 19 20 import difflib 21 import json 22 import subprocess 23 import sys 24 import vim 25 26 # Change this to the full path if clang-format is not on the path. 27 binary = 'clang-format' 28 29 # Change this to format according to other formatting styles (see 30 # clang-format -help) 31 style = 'LLVM' 32 33 # Get the current text. 34 buf = vim.current.buffer 35 text = '\n'.join(buf) 36 37 # Determine range to format. 38 cursor = int(vim.eval('line2byte(line("."))+col(".")')) - 2 39 lines = '%s:%s' % (vim.current.range.start + 1, vim.current.range.end + 1) 40 41 # Avoid flashing an ugly, ugly cmd prompt on Windows when invoking clang-format. 42 startupinfo = None 43 if sys.platform.startswith('win32'): 44 startupinfo = subprocess.STARTUPINFO() 45 startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW 46 startupinfo.wShowWindow = subprocess.SW_HIDE 47 48 # Call formatter. 49 p = subprocess.Popen([binary, '-lines', lines, '-style', style, 50 '-cursor', str(cursor)], 51 stdout=subprocess.PIPE, stderr=subprocess.PIPE, 52 stdin=subprocess.PIPE, startupinfo=startupinfo) 53 stdout, stderr = p.communicate(input=text) 54 55 # If successful, replace buffer contents. 56 if stderr: 57 message = stderr.splitlines()[0] 58 parts = message.split(' ', 2) 59 if len(parts) > 2: 60 message = parts[2] 61 print 'Formatting failed: %s (total %d warnings, %d errors)' % ( 62 message, stderr.count('warning:'), stderr.count('error:')) 63 64 if not stdout: 65 print ('No output from clang-format (crashed?).\n' + 66 'Please report to bugs.llvm.org.') 67 else: 68 lines = stdout.split('\n') 69 output = json.loads(lines[0]) 70 lines = lines[1:] 71 sequence = difflib.SequenceMatcher(None, vim.current.buffer, lines) 72 for op in reversed(sequence.get_opcodes()): 73 if op[0] is not 'equal': 74 vim.current.buffer[op[1]:op[2]] = lines[op[3]:op[4]] 75 vim.command('goto %d' % (output['Cursor'] + 1)) 76
