76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
# This file is a minimal clang-format vim-integration. To install:
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# - Change 'binary' if clang-format is not on the path (see below).
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# - Add to your .vimrc:
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#
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# map <C-I> :pyf <path-to-this-file>/clang-format.py<CR>
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# imap <C-I> <ESC>:pyf <path-to-this-file>/clang-format.py<CR>i
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#
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# The first line enables clang-format for NORMAL and VISUAL mode, the second
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# line adds support for INSERT mode. Change "C-I" to another binding if you
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# need clang-format on a different key (C-I stands for Ctrl+i).
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#
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# With this integration you can press the bound key and clang-format will
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# format the current line in NORMAL and INSERT mode or the selected region in
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# VISUAL mode. The line or region is extended to the next bigger syntactic
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# entity.
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#
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# It operates on the current, potentially unsaved buffer and does not create
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# or save any files. To revert a formatting, just undo.
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import difflib
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import json
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import subprocess
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import sys
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import vim
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# Change this to the full path if clang-format is not on the path.
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binary = 'clang-format'
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# Change this to format according to other formatting styles (see
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# clang-format -help)
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style = 'LLVM'
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# Get the current text.
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buf = vim.current.buffer
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text = '\n'.join(buf)
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# Determine range to format.
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cursor = int(vim.eval('line2byte(line("."))+col(".")')) - 2
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lines = '%s:%s' % (vim.current.range.start + 1, vim.current.range.end + 1)
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# Avoid flashing an ugly, ugly cmd prompt on Windows when invoking clang-format.
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startupinfo = None
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if sys.platform.startswith('win32'):
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startupinfo = subprocess.STARTUPINFO()
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startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
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startupinfo.wShowWindow = subprocess.SW_HIDE
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# Call formatter.
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p = subprocess.Popen([binary, '-lines', lines, '-style', style,
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'-cursor', str(cursor)],
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stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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stdin=subprocess.PIPE, startupinfo=startupinfo)
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stdout, stderr = p.communicate(input=text)
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# If successful, replace buffer contents.
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if stderr:
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message = stderr.splitlines()[0]
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parts = message.split(' ', 2)
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if len(parts) > 2:
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message = parts[2]
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print 'Formatting failed: %s (total %d warnings, %d errors)' % (
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message, stderr.count('warning:'), stderr.count('error:'))
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if not stdout:
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print ('No output from clang-format (crashed?).\n' +
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'Please report to bugs.llvm.org.')
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else:
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lines = stdout.split('\n')
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output = json.loads(lines[0])
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lines = lines[1:]
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sequence = difflib.SequenceMatcher(None, vim.current.buffer, lines)
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for op in reversed(sequence.get_opcodes()):
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if op[0] is not 'equal':
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vim.current.buffer[op[1]:op[2]] = lines[op[3]:op[4]]
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vim.command('goto %d' % (output['Cursor'] + 1))
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