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1 " Vim Ada plugin file
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2 " Language: Ada
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3 " Maintainer: Neil Bird <neil@fnxweb.com>
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4 " Last Change: 2003 May 11
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5 " Version: $Id$
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6 " Look for the latest version at http://vim.sourceforge.net/
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7 "
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8 " Perform Ada specific completion & tagging.
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9 "
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10 "
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11 " Provides mapping overrides for tag jumping that figure out the current
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12 " Ada object and tag jump to that, not the 'simple' vim word.
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13 " Similarly allows <Ctrl-N> matching of full-length ada entities from tags.
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14 " Exports 'AdaWord()' function to return full name of Ada entity under the
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15 " cursor( or at given line/column), stripping whitespace/newlines as necessary.
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16
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17
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18 " Only do this when not done yet for this buffer
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19 if exists("b:did_ftplugin")
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20 finish
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21 endif
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22
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23 " Don't load another plugin for this buffer
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24 let b:did_ftplugin = 1
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25
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26 " Temporarily set cpoptions to ensure the script loads OK
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27 let s:cpoptions = &cpoptions
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28 set cpo-=C
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29
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30
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31 " Ada comments
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32 setlocal comments+=O:--
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33
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34
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35 " Make local tag mappings for this buffer (if not already set)
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36 if mapcheck('<C-]>','n') == ''
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37 nnoremap <unique> <buffer> <C-]> :call JumpToTag_ada('')<cr>
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38 endif
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39 if mapcheck('g<C-]>','n') == ''
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40 nnoremap <unique> <buffer> g<C-]> :call JumpToTag_ada('','stj')<cr>
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41 endif
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42
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43 if mapcheck('<C-N>','i') == ''
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44 inoremap <unique> <buffer> <C-N> <C-R>=<SID>AdaCompletion("\<lt>C-N>")<cr>
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45 endif
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46 if mapcheck('<C-P>','i') == ''
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47 inoremap <unique> <buffer> <C-P> <C-R>=<SID>AdaCompletion("\<lt>C-P>")<cr>
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48 endif
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49 if mapcheck('<C-X><C-]>','i') == ''
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50 inoremap <unique> <buffer> <C-X><C-]> <C-R>=<SID>AdaCompletion("\<lt>C-X>\<lt>C-]>")<cr>
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51 endif
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52 if mapcheck('<bs>','i') == ''
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53 inoremap <silent> <unique> <buffer> <bs> <C-R>=<SID>AdaInsertBackspace()<cr>
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54 endif
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55
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56
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57 " Only do this when not done yet for this buffer & matchit is used
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58 if ! exists("b:match_words") && exists("loaded_matchit")
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59 " The following lines enable the macros/matchit.vim plugin for
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60 " Ada-specific extended matching with the % key.
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61 let s:notend = '\%(\<end\s\+\)\@<!'
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62 let b:match_words=
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63 \ s:notend . '\<if\>:\<elsif\>:\<else\>:\<end\>\s\+\<if\>,' .
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64 \ s:notend . '\<case\>:\<when\>:\<end\>\s\+\<case\>,' .
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65 \ '\%(\<while\>.*\|\<for\>.*\|'.s:notend.'\)\<loop\>:\<end\>\s\+\<loop\>,' .
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66 \ '\%(\<do\>\|\<begin\>\):\<exception\>:\<end\>\s*\%($\|[;A-Z]\),' .
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67 \ s:notend . '\<record\>:\<end\>\s\+\<record\>'
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68 endif
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69
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70
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71 " Prevent re-load of functions
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72 if exists('s:id')
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73 finish
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74 endif
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75
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76 " Get this script's unique id
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77 map <script> <SID>?? <SID>??
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78 let s:id = substitute( maparg('<SID>??'), '^<SNR>\(.*\)_??$', '\1', '' )
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79 unmap <script> <SID>??
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80
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81
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82 " Extract current Ada word across multiple lines
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83 " AdaWord( [line, column] )\
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84 let s:AdaWordRegex = '\a\w*\(\_s*\.\_s*\a\w*\)*'
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85 let s:AdaComment = "\\v^(\"[^\"]*\"|'.'|[^\"']){-}\\zs\\s*--.*"
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86
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87 function! AdaWord(...)
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88 if a:0 > 1
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89 let linenr = a:1
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90 let colnr = a:2 - 1
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91 else
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92 let linenr = line('.')
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93 let colnr = col('.') - 1
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94 endif
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95 let line = substitute( getline(linenr), s:AdaComment, '', '' )
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96 " Cope with tag searching for items in comments; if we are, don't loop
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97 " backards looking for previous lines
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98 if colnr > strlen(line)
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99 " We were in a comment
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100 let line = getline(linenr)
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101 let search_prev_lines = 0
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102 else
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103 let search_prev_lines = 1
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104 endif
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105
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106 " Go backwards until we find a match (Ada ID) that *doesn't* include our
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107 " location - i.e., the previous ID. This is because the current 'correct'
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108 " match will toggle matching/not matching as we traverse characters
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109 " backwards. Thus, we have to find the previous unrelated match, exclude
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110 " it, then use the next full match (ours).
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111 " Remember to convert vim column 'colnr' [1..n] to string offset [0..(n-1)]
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112 " ... but start, here, one after the required char.
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113 let newcol = colnr + 1
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114 while 1
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115 let newcol = newcol - 1
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116 if newcol < 0
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117 " Have to include previous line from file
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118 let linenr = linenr - 1
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119 if linenr < 1 || !search_prev_lines
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120 " Start of file or matching in a comment
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121 let linenr = 1
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122 let newcol = 0
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123 let ourmatch = match( line, s:AdaWordRegex )
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124 break
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125 endif
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126 " Get previous line, and prepend it to our search string
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127 let newline = substitute( getline(linenr), s:AdaComment, '', '' )
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128 let newcol = strlen(newline) - 1
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129 let colnr = colnr + newcol
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130 let line = newline . line
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131 endif
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132 " Check to see if this is a match excluding 'us'
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133 let mend = newcol + matchend( strpart(line,newcol), s:AdaWordRegex ) - 1
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134 if mend >= newcol && mend < colnr
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135 " Yes
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136 let ourmatch = mend+1 + match( strpart(line,mend+1), s:AdaWordRegex )
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137 break
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138 endif
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139 endwhile
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140
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141 " Got anything?
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142 if ourmatch < 0
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143 return ''
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144 else
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145 let line = strpart( line, ourmatch)
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146 endif
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147
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148 " Now simply add further lines until the match gets no bigger
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149 let matchstr = matchstr( line, s:AdaWordRegex )
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150 let lastline = line('$')
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151 let linenr = line('.') + 1
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152 while linenr <= lastline
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153 let lastmatch = matchstr
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154 let line = line . substitute( getline(linenr), s:AdaComment, '', '' )
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155 let matchstr = matchstr( line, s:AdaWordRegex )
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156 if matchstr == lastmatch
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157 break
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158 endif
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159 endwhile
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160
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161 " Strip whitespace & return
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162 return substitute( matchstr, '\s\+', '', 'g' )
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163 endfunction
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164
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165
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166 " Word tag - include '.' and if Ada make uppercase
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167 " Name allows a common JumpToTag() to look for an ft specific JumpToTag_ft().
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168 function! JumpToTag_ada(word,...)
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169 if a:word == ''
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170 " Get current word
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171 let word = AdaWord()
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172 if word == ''
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173 return
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174 endif
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175 else
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176 let word = a:word
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177 endif
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178 if a:0 > 0
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179 let mode = a:1
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180 else
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181 let mode = 'tj'
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182 endif
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183
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184 let v:errmsg = ''
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185 execute 'silent!' mode word
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186 if v:errmsg != ''
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187 if v:errmsg =~ '^E426:' " Tag not found
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188 let ignorecase = &ignorecase
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189 set ignorecase
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190 execute mode word
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191 let &ignorecase = ignorecase
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192 else
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193 " Repeat to give error
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194 execute mode word
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195 endif
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196 endif
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197 endfunction
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198
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199
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200 " Word completion (^N/^R/^X^]) - force '.' inclusion
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201 function! s:AdaCompletion(cmd)
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202 set iskeyword+=46
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203 return a:cmd . "\<C-R>=<SNR>" . s:id . "_AdaCompletionEnd()\<CR>"
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204 endfunction
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205 function! s:AdaCompletionEnd()
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206 set iskeyword-=46
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207 return ''
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208 endfunction
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209
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210
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211 " Backspace at end of line after auto-inserted commentstring '-- ' wipes it
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212 function! s:AdaInsertBackspace()
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213 let line = getline('.')
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214 if col('.') > strlen(line) && match(line,'-- $') != -1 && match(&comments,'--') != -1
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215 return "\<bs>\<bs>\<bs>"
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216 else
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217 return "\<bs>"
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218 endif
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219 endfunction
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220
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221
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222 " Reset cpoptions
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223 let &cpoptions = s:cpoptions
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224 unlet s:cpoptions
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225
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226 " vim: sts=2 sw=2 :
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