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| " Join : a better (hopefully) :Join command in Vim | ||
| " Author : Kai Yuan <[email protected]> | ||
| " License: {{{ | ||
| "Copyright (c) 2013 Kai Yuan | ||
| "Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| "this software and associated documentation files (the "Software"), to deal in | ||
| "the Software without restriction, including without limitation the rights to | ||
| "use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
| "the Software, and to permit persons to whom the Software is furnished to do so, | ||
| "subject to the following conditions: | ||
| " | ||
| "The above copyright notice and this permission notice shall be included in all | ||
| "copies or substantial portions of the Software. | ||
| " | ||
| "THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| "IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
| "FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
| "COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
| "IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| "CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| " }}} | ||
| if exists("g:autoloaded_Join") || &cp | ||
| finish | ||
| endif | ||
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| let g:autoloaded_Join = 1 | ||
| let s:FLAGS = ['k','r'] "available flags | ||
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| "message dictionary | ||
| let s:errMsgsDict = {'err_arg_sep': '[JoinErr:ARG] Invalid Separator'} | ||
| let s:errMsgsDict['err_arg_num'] = '[JoinErr:ARG] Invalid number of arguments' | ||
| let s:errMsgsDict['err_arg_cf'] = '[JoinErr:ARG] Argument Count or Flags is invalid' | ||
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| "============================================================ | ||
| " Helper functions {{{ | ||
| "============================================================ | ||
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| "------------------------------------ | ||
| " display highlighted error message | ||
| "------------------------------------ | ||
| function! Join#err_msg(errKey) | ||
| echohl Error | ||
| echon s:errMsgsDict[a:errKey] | ||
| echohl None | ||
| endfunction | ||
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| "------------------------------------ | ||
| "check if an input is Count argument | ||
| "------------------------------------ | ||
| function! Join#is_count(inputCount) | ||
| return a:inputCount =~ '^-\?[1-9]\d*$' | ||
| endfunction | ||
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| "------------------------------------ | ||
| "check if an input string is flags argument | ||
| "------------------------------------ | ||
| function! Join#is_flag(inputFlags) | ||
| let flagReg = '['. join(s:FLAGS,'') .']' | ||
| if empty(a:inputFlags) || len(a:inputFlags) > len(s:FLAGS) | ||
| return 0 | ||
| else | ||
| return empty(substitute(a:inputFlags,flagReg, '','g')) | ||
| endif | ||
| endfunction | ||
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| "}}} | ||
|
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| "------------------------------------ | ||
| " Do the join logic here | ||
| "------------------------------------ | ||
| function! Join#do_join(sep, bang, count, flag, first, last) | ||
| if g:Join_debug"{{{ | ||
| echom '---------------------' | ||
| echom 'parsed sep:' . a:sep | ||
| echom 'bang:' . a:bang | ||
| echom 'input count:' . a:count | ||
| echom 'input flags' . a:flag | ||
| echom '---------------------' | ||
| endif"}}} | ||
| let cnt = a:count | ||
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| "flags | ||
| let joinRev = stridx(a:flag, 'r') >= 0 | ||
| let joinKeep = stridx(a:flag, 'k') >= 0 | ||
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| if a:first == a:last | ||
| let cnt = cnt == 0 ? 1 : cnt | ||
| "a:first and a:last are same | ||
| let jbegin = cnt > 0 ? a:first : a:first + ((cnt + 1)<0?cnt+1:cnt) | ||
| let jend = cnt > 0 ? (cnt > 1 ? a:first + cnt - 1:a:first + cnt): a:first | ||
| else " user inputed a range > 1 line | ||
| if cnt == 0 "without count | ||
| let jbegin = a:first | ||
| let jend = a:last | ||
| elseif cnt > 0 "with positive count | ||
| let jbegin = a:last | ||
| let jend = jbegin + (cnt==1?1:cnt -1) | ||
| else " negative count !! could be confusing, need explain in doc | ||
| let jend = a:first | ||
| let jbegin = (a:first + ((cnt+1)<0?cnt+1:cnt) ) | ||
| endif | ||
| endif | ||
| " | ||
| if g:Join_debug"{{{ | ||
| echom '---------------------' | ||
| echom 'calculated firstline:'.jbegin | ||
| echom 'calculated lastline:' . jend | ||
| echom 'join keep :' . joinKeep | ||
| echom 'join rev :' . joinRev | ||
| echom '---------------------' | ||
| endif"}}} | ||
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| let jbegin = jbegin < 0 ? 0 : jbegin | ||
| let jend = jend >= line('$') ? line('$') : jend | ||
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| "now load lines | ||
| let lines = getline(jbegin, jend) | ||
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| if !a:bang "without bang, trim lines | ||
| call map(lines, "substitute(v:val, '^\\s\\+\\|\\s\\$','','g')") | ||
| endif | ||
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| if !joinKeep | ||
| "remove lines | ||
| execute jbegin . ',' . jend . 'd' | ||
| call append(jbegin>0 ? jbegin-1 : 0, join(joinRev?reverse(lines):lines, a:sep)) | ||
| else | ||
| if cnt>=0 | ||
| call setline(jbegin, join(joinRev?reverse(lines):lines, a:sep)) | ||
| else | ||
| call setline(jend, join(joinRev?reverse(lines):lines, a:sep)) | ||
| endif | ||
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| endif | ||
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| endfunction | ||
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| "------------------------------------ | ||
| " this function parses user inputs, and return parted | ||
| " arguments in a dictionary. If parsing error occured, exception will be thrown | ||
| " argstr should follow format [sep] [count] [flags] | ||
| " for example 'I am sep' 20 kr | ||
| "------------------------------------ | ||
| function! Join#parse_args(argstr) | ||
| let rest = a:argstr | ||
| let c = 0 | ||
| let sep = " " | ||
| let flags = "" | ||
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| "first check sep | ||
| if a:argstr[0] =~ "['\"]" | ||
| let sepRegex = "\\v^(['\"]).*(\\\\)@<!\\1( |$)@=" | ||
| try | ||
| let sepInput = matchstr(a:argstr,sepRegex,0) | ||
| catch /.*/ | ||
| throw 'err_arg-sep' | ||
| endtry | ||
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| if empty(sepInput) | ||
| throw 'err_arg_sep' | ||
| else | ||
| let rest = strpart(rest, len(sepInput)) | ||
| let sep = eval(sepInput) | ||
| endif | ||
| endif | ||
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| let rest = substitute(rest,' \+', " ","g") | ||
| let cfList = split(rest, " ") "count flag list | ||
| let ln = len(cfList) | ||
| if ln > 2 | ||
| throw 'err_arg_num' | ||
| elseif ln == 1 | ||
| if Join#is_count(cfList[0]) | ||
| let c = cfList[0] | ||
| elseif Join#is_flag(cfList[0]) | ||
| let flags = cfList[0] | ||
| else | ||
| throw 'err_arg_cf' | ||
| endif | ||
| elseif ln == 2 | ||
| if Join#is_count(cfList[0]) && Join#is_flag(cfList[1]) | ||
| let c = cfList[0] | ||
| let flags = cfList[1] | ||
| elseif Join#is_count(cfList[1]) && Join#is_flag(cfList[0]) | ||
| let c = cfList[1] | ||
| let flags = cfList[0] | ||
| else | ||
| throw 'err_arg_cf' | ||
| endif | ||
| endif | ||
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| return {'sep':sep, 'count':c, 'flags':flags} | ||
| endfunction | ||
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| "-------------------------------------------- | ||
| " The function is the entry point. When user | ||
| " executed the :Join command, this function will | ||
| " be called. | ||
| "-------------------------------------------- | ||
| function! Join#Join(argstr, bang) range | ||
| try | ||
| let args = Join#parse_args(a:argstr) | ||
| catch /^err/ | ||
| call Join#err_msg(v:exception) | ||
| return | ||
| endtry | ||
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| let args['first'] = a:firstline | ||
| let args['last'] = a:lastline | ||
| let args['bang'] = a:bang | ||
| call Join#do_join( args['sep'], args['bang'], args['count'], args['flags'], args['first'], args['last']) | ||
| endfunction | ||
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| " vim: ts=2:sw=2:ft=vim:fdm=marker |
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