83 lines
2.9 KiB
Python
83 lines
2.9 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 the output of
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# 'clang-format --help' for a list of supported styles. The default looks for
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# a '.clang-format' or '_clang-format' file to indicate the style that should be
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# used.
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style = 'file'
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def main():
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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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lines = '%s:%s' % (vim.current.range.start + 1, vim.current.range.end + 1)
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# Determine the cursor position.
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cursor = int(vim.eval('line2byte(line("."))+col(".")')) - 2
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if cursor < 0:
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print 'Couldn\'t determine cursor position. Is your file empty?'
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return
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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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command = [binary, '-lines', lines, '-style', style, '-cursor', str(cursor)]
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if vim.current.buffer.name:
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command.extend(['-assume-filename', vim.current.buffer.name])
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p = subprocess.Popen(command,
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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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print stderr
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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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main()
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