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13912
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1 " Vim plugin for formatting XML
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2 " Last Change: Thu, 15 Jan 2015 21:26:55 +0100
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3 " Version: 0.1
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4 " Author: Christian Brabandt <cb@256bit.org>
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5 " Script: http://www.vim.org/scripts/script.php?script_id=
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6 " License: VIM License
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7 " GetLatestVimScripts: ???? 18 :AutoInstall: xmlformat.vim
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8 " Documentation: see :h xmlformat.txt (TODO!)
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9 " ---------------------------------------------------------------------
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10 " Load Once: {{{1
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11 if exists("g:loaded_xmlformat") || &cp
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12 finish
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13 endif
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14 let g:loaded_xmlformat = 1
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15 let s:keepcpo = &cpo
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16 set cpo&vim
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17
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18 " Main function: Format the input {{{1
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19 func! xmlformat#Format()
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20 " only allow reformatting through the gq command
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21 " (e.g. Vim is in normal mode)
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22 if mode() != 'n'
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23 " do not fall back to internal formatting
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24 return 0
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25 endif
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26 let sw = shiftwidth()
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27 let prev = prevnonblank(v:lnum-1)
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28 let s:indent = indent(prev)/sw
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29 let result = []
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30 let lastitem = prev ? getline(prev) : ''
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31 let is_xml_decl = 0
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32 " split on `<`, but don't split on very first opening <
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33 for item in split(getline(v:lnum), '.\@<=[>]\zs')
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34 if s:EndTag(item)
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35 let s:indent = s:DecreaseIndent()
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36 call add(result, s:Indent(item))
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37 elseif s:EmptyTag(lastitem)
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38 call add(result, s:Indent(item))
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39 elseif s:StartTag(lastitem) && s:IsTag(item)
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40 let s:indent += 1
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41 call add(result, s:Indent(item))
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42 else
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43 if !s:IsTag(item)
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44 " Simply split on '<'
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45 let t=split(item, '.<\@=\zs')
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46 let s:indent+=1
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47 call add(result, s:Indent(t[0]))
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48 let s:indent = s:DecreaseIndent()
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49 call add(result, s:Indent(t[1]))
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50 else
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51 call add(result, s:Indent(item))
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52 endif
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53 endif
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54 let lastitem = item
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55 endfor
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56
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57 if !empty(result)
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58 exe v:lnum. ",". (v:lnum + v:count - 1). 'd'
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59 call append(v:lnum - 1, result)
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60 " Might need to remove the last line, if it became empty because of the
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61 " append() call
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62 let last = v:lnum + len(result)
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63 if getline(last) is ''
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64 exe last. 'd'
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65 endif
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66 endif
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67
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68 " do not run internal formatter!
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69 return 0
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70 endfunc
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71 " Check if given tag is XML Declaration header {{{1
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72 func! s:IsXMLDecl(tag)
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73 return a:tag =~? '^\s*<?xml\s\?\%(version="[^"]*"\)\?\s\?\%(encoding="[^"]*"\)\? ?>\s*$'
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74 endfunc
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75 " Return tag indented by current level {{{1
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76 func! s:Indent(item)
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77 return repeat(' ', shiftwidth()*s:indent). s:Trim(a:item)
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78 endfu
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79 " Return item trimmed from leading whitespace {{{1
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80 func! s:Trim(item)
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81 if exists('*trim')
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82 return trim(a:item)
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83 else
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84 return matchstr(a:item, '\S\+.*')
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85 endif
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86 endfunc
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87 " Check if tag is a new opening tag <tag> {{{1
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88 func! s:StartTag(tag)
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89 return a:tag =~? '^\s*<[^/?]'
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90 endfunc
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91 " Remove one level of indentation {{{1
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92 func! s:DecreaseIndent()
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93 return (s:indent > 0 ? s:indent - 1 : 0)
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94 endfunc
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95 " Check if tag is a closing tag </tag> {{{1
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96 func! s:EndTag(tag)
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97 return a:tag =~? '^\s*</'
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98 endfunc
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99 " Check that the tag is actually a tag and not {{{1
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100 " something like "foobar</foobar>"
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101 func! s:IsTag(tag)
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102 return s:Trim(a:tag)[0] == '<'
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103 endfunc
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104 " Check if tag is empty <tag/> {{{1
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105 func! s:EmptyTag(tag)
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106 return a:tag =~ '/>\s*$'
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107 endfunc
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108 " Restoration And Modelines: {{{1
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109 let &cpo= s:keepcpo
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110 unlet s:keepcpo
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111 " Modeline {{{1
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112 " vim: fdm=marker fdl=0 ts=2 et sw=0 sts=-1
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