Mercurial > vim
annotate runtime/indent/mp.vim @ 35209:c7799d9fd100 default tip
runtime(dart): add basic dart ftplugin file
Commit: https://github.com/vim/vim/commit/4d7892bfb1dbcc8ba19d9c60c63b3d11b758553f
Author: Riley Bruins <ribru17@hotmail.com>
Date: Sun May 19 09:31:46 2024 +0200
runtime(dart): add basic dart ftplugin file
fixes https://github.com/vim/vim/issues/14793
closes https://github.com/vim/vim/issues/14802
Signed-off-by: Riley Bruins <ribru17@hotmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Sun, 19 May 2024 09:45:03 +0200 |
| parents | f00c56ee8118 |
| children |
| rev | line source |
|---|---|
| 29885 | 1 vim9script |
| 2 | |
| 3 # MetaPost indent file | |
| 4 # Language: MetaPost | |
| 5 # Maintainer: Nicola Vitacolonna <nvitacolonna@gmail.com> | |
| 6 # Former Maintainers: Eugene Minkovskii <emin@mccme.ru> | |
| 7 # Latest Revision: 2022 Aug 12 | |
| 7 | 8 |
| 9 if exists("b:did_indent") | |
| 10 finish | |
| 11 endif | |
| 12 | |
| 29885 | 13 b:did_indent = 1 |
| 7 | 14 |
| 29885 | 15 setlocal indentexpr=g:MetaPostIndent() |
| 16 setlocal indentkeys+==end,=else,=fi,=fill,0),0] | |
| 17 setlocal nolisp | |
| 18 setlocal nosmartindent | |
| 19 | |
| 20 b:undo_indent = "setl indentexpr< indentkeys< lisp< smartindent<" | |
| 7 | 21 |
| 29885 | 22 # Regexps {{{ |
| 23 # Expressions starting indented blocks | |
| 24 const MP_OPEN_TAG = [ | |
| 25 '\<if\>', | |
| 26 '\<else\%[if]\>', | |
| 27 '\<for\%(\|ever\|suffixes\)\>', | |
| 28 '\<begingroup\>', | |
| 29 '\<\%(\|var\|primary\|secondary\|tertiary\)def\>', | |
| 30 '^\s*\<begin\%(fig\|graph\|glyph\|char\|logochar\)\>', | |
| 31 '[([{]', | |
| 32 ]->extend(get(g:, "mp_open_tag", []))->join('\|') | |
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33 |
| 29885 | 34 # Expressions ending indented blocks |
| 35 const MP_CLOSE_TAG = [ | |
| 36 '\<fi\>', | |
| 37 '\<else\%[if]\>', | |
| 38 '\<end\%(\|for\|group\|def\|fig\|char\|glyph\|graph\)\>', | |
| 39 '[)\]}]' | |
| 40 ]->extend(get(g:, "mp_close_tag", []))->join('\|') | |
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41 |
| 29885 | 42 # Statements that may span multiple lines and are ended by a semicolon. To |
| 43 # keep this list short, statements that are unlikely to be very long or are | |
| 44 # not very common (e.g., keywords like `interim` or `showtoken`) are not | |
| 45 # included. | |
| 46 # | |
| 47 # The regex for assignments and equations (the last branch) is tricky, because | |
| 48 # it must not match things like `for i :=`, `if a=b`, `def...=`, etc... It is | |
| 49 # not perfect, but it works reasonably well. | |
| 50 const MP_STATEMENT = [ | |
| 51 '\<\%(\|un\|cut\)draw\%(dot\)\=\>', | |
| 52 '\<\%(\|un\)fill\%[draw]\>', | |
| 53 '\<draw\%(dbl\)\=arrow\>', | |
| 54 '\<clip\>', | |
| 55 '\<addto\>', | |
| 56 '\<save\>', | |
| 57 '\<setbounds\>', | |
| 58 '\<message\>', | |
| 59 '\<errmessage\>', | |
| 60 '\<errhelp\>', | |
| 61 '\<fontmapline\>', | |
| 62 '\<pickup\>', | |
| 63 '\<show\>', | |
| 64 '\<special\>', | |
| 65 '\<write\>', | |
| 66 '\%(^\|;\)\%([^;=]*\%(' .. MP_OPEN_TAG .. '\)\)\@!.\{-}:\==', | |
| 67 ]->join('\|') | |
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68 |
| 29885 | 69 # A line ends with zero or more spaces, possibly followed by a comment. |
| 70 const EOL = '\s*\%($\|%\)' | |
| 71 # }}} | |
| 72 | |
| 73 # Auxiliary functions {{{ | |
| 74 # Returns true if (0-based) position immediately preceding `pos` in `line` is | |
| 75 # inside a string or a comment; returns false otherwise. | |
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76 |
| 29885 | 77 # This is the function that is called more often when indenting, so it is |
| 78 # critical that it is efficient. The method we use is significantly faster | |
| 79 # than using syntax attributes, and more general (it does not require | |
| 80 # syntax_items). It is also faster than using a single regex matching an even | |
| 81 # number of quotes. It helps that MetaPost strings cannot span more than one | |
| 82 # line and cannot contain escaped quotes. | |
| 83 def IsCommentOrString(line: string, pos: number): bool | |
| 84 var in_string = 0 | |
| 85 var q = stridx(line, '"') | |
| 86 var c = stridx(line, '%') | |
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87 |
| 29885 | 88 while q >= 0 && q < pos |
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89 if c >= 0 && c < q |
| 29885 | 90 if in_string # Find next percent symbol |
| 91 c = stridx(line, '%', q + 1) | |
| 92 else # Inside comment | |
| 93 return true | |
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94 endif |
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95 endif |
| 29885 | 96 in_string = 1 - in_string |
| 97 q = stridx(line, '"', q + 1) # Find next quote | |
| 7 | 98 endwhile |
| 29885 | 99 |
| 100 return in_string || (c >= 0 && c <= pos) | |
| 101 enddef | |
| 7 | 102 |
| 29885 | 103 # Find the first non-comment non-blank line before the given line. |
| 104 def PrevNonBlankNonComment(lnum: number): number | |
| 105 var nr = prevnonblank(lnum - 1) | |
| 106 while getline(nr) =~# '^\s*%' | |
| 107 nr = prevnonblank(nr - 1) | |
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108 endwhile |
| 29885 | 109 return nr |
| 110 enddef | |
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111 |
| 29885 | 112 # Returns true if the last tag appearing in the line is an open tag; returns |
| 113 # false otherwise. | |
| 114 def LastTagIsOpen(line: string): bool | |
| 115 var o = LastValidMatchEnd(line, MP_OPEN_TAG, 0) | |
| 116 if o == - 1 | |
| 117 return false | |
| 118 endif | |
| 119 return LastValidMatchEnd(line, MP_CLOSE_TAG, o) < 0 | |
| 120 enddef | |
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121 |
| 29885 | 122 # A simple, efficient and quite effective heuristics is used to test whether |
| 123 # a line should cause the next line to be indented: count the "opening tags" | |
| 124 # (if, for, def, ...) in the line, count the "closing tags" (endif, endfor, | |
| 125 # ...) in the line, and compute the difference. We call the result the | |
| 126 # "weight" of the line. If the weight is positive, then the next line should | |
| 127 # most likely be indented. Note that `else` and `elseif` are both opening and | |
| 128 # closing tags, so they "cancel out" in almost all cases, the only exception | |
| 129 # being a leading `else[if]`, which is counted as an opening tag, but not as | |
| 130 # a closing tag (so that, for instance, a line containing a single `else:` | |
| 131 # will have weight equal to one, not zero). We do not treat a trailing | |
| 132 # `else[if]` in any special way, because lines ending with an open tag are | |
| 133 # dealt with separately before this function is called (see MetaPostIndent()). | |
| 134 # | |
| 135 # Example: | |
| 136 # | |
| 137 # forsuffixes $=a,b: if x.$ = y.$ : draw else: fill fi | |
| 138 # % This line will be indented because |{forsuffixes,if,else}| > |{else,fi}| (3 > 2) | |
| 139 # endfor | |
| 140 def Weight(line: string): number | |
| 141 var o = 0 | |
| 142 var i = ValidMatchEnd(line, MP_OPEN_TAG, 0) | |
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143 while i > 0 |
| 29885 | 144 o += 1 |
| 145 i = ValidMatchEnd(line, MP_OPEN_TAG, i) | |
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146 endwhile |
| 29885 | 147 var c = 0 |
| 148 i = matchend(line, '^\s*\<else\%[if]\>') # Skip a leading else[if] | |
| 149 i = ValidMatchEnd(line, MP_CLOSE_TAG, i) | |
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150 while i > 0 |
| 29885 | 151 c += 1 |
| 152 i = ValidMatchEnd(line, MP_CLOSE_TAG, i) | |
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153 endwhile |
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154 return o - c |
| 29885 | 155 enddef |
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156 |
| 29885 | 157 # Similar to matchend(), but skips strings and comments. |
| 158 # line: a String | |
| 159 def ValidMatchEnd(line: string, pat: string, start: number): number | |
| 160 var i = matchend(line, pat, start) | |
| 161 while i > 0 && IsCommentOrString(line, i) | |
| 162 i = matchend(line, pat, i) | |
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163 endwhile |
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164 return i |
| 29885 | 165 enddef |
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166 |
| 29885 | 167 # Like s:ValidMatchEnd(), but returns the end position of the last (i.e., |
| 168 # rightmost) match. | |
| 169 def LastValidMatchEnd(line: string, pat: string, start: number): number | |
| 170 var last_found = -1 | |
| 171 var i = matchend(line, pat, start) | |
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172 while i > 0 |
| 29885 | 173 if !IsCommentOrString(line, i) |
| 174 last_found = i | |
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175 endif |
| 29885 | 176 i = matchend(line, pat, i) |
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177 endwhile |
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178 return last_found |
| 29885 | 179 enddef |
| 7 | 180 |
| 29885 | 181 def DecreaseIndentOnClosingTag(curr_indent: number): number |
| 182 var cur_text = getline(v:lnum) | |
| 183 if cur_text =~# '^\s*\%(' .. MP_CLOSE_TAG .. '\)' | |
| 184 return max([curr_indent - shiftwidth(), 0]) | |
| 185 endif | |
| 186 return curr_indent | |
| 187 enddef | |
| 188 # }}} | |
| 189 | |
| 190 # Main function {{{ | |
| 191 def g:MetaPostIndent(): number | |
| 192 # Do not touch indentation inside verbatimtex/btex.. etex blocks. | |
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193 if synIDattr(synID(v:lnum, 1, 1), "name") =~# '^mpTeXinsert$\|^tex\|^Delimiter' |
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194 return -1 |
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195 endif |
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196 |
| 29885 | 197 # At the start of a MetaPost block inside ConTeXt, do not touch indentation |
| 198 if synIDattr(synID(prevnonblank(v:lnum - 1), 1, 1), "name") == "contextBlockDelim" | |
| 199 return -1 | |
| 200 endif | |
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201 |
| 29885 | 202 var lnum = PrevNonBlankNonComment(v:lnum) |
| 203 | |
| 204 # At the start of the file use zero indent. | |
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205 if lnum == 0 |
| 7 | 206 return 0 |
| 207 endif | |
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208 |
| 29885 | 209 var prev_text = getline(lnum) |
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210 |
| 29885 | 211 # Every rule of indentation in MetaPost is very subjective. We might get |
| 212 # creative, but things get murky very soon (there are too many corner | |
| 213 # cases). So, we provide a means for the user to decide what to do when this | |
| 214 # script doesn't get it. We use a simple idea: use '%>', '%<', '%=', and | |
| 215 # '%!', to explicitly control indentation. The '<' and '>' symbols may be | |
| 216 # repeated many times (e.g., '%>>' will cause the next line to be indented | |
| 217 # twice). | |
| 218 # | |
| 219 # User-defined overrides take precedence over anything else. | |
| 220 var j = match(prev_text, '%[<>=!]') | |
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221 if j > 0 |
| 29885 | 222 var i = strlen(matchstr(prev_text, '%>\+', j)) - 1 |
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223 if i > 0 |
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224 return indent(lnum) + i * shiftwidth() |
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225 endif |
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226 |
| 29885 | 227 i = strlen(matchstr(prev_text, '%<\+', j)) - 1 |
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228 if i > 0 |
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229 return max([indent(lnum) - i * shiftwidth(), 0]) |
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230 endif |
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231 |
| 29885 | 232 if match(prev_text, '%=', j) > -1 |
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233 return indent(lnum) |
| 7 | 234 endif |
| 29885 | 235 |
| 236 if match(prev_text, '%!', j) > -1 | |
| 237 return -1 | |
| 238 endif | |
| 7 | 239 endif |
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240 |
| 29885 | 241 # If the reference line ends with an open tag, indent. |
| 242 # | |
| 243 # Example: | |
| 244 # | |
| 245 # if c: | |
| 246 # 0 | |
| 247 # else: | |
| 248 # 1 | |
| 249 # fi if c2: % Note that this line has weight equal to zero. | |
| 250 # ... % This line will be indented | |
| 251 if LastTagIsOpen(prev_text) | |
| 252 return DecreaseIndentOnClosingTag(indent(lnum) + shiftwidth()) | |
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253 endif |
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254 |
| 29885 | 255 # Lines with a positive weight are unbalanced and should likely be indented. |
| 256 # | |
| 257 # Example: | |
| 258 # | |
| 259 # def f = enddef for i = 1 upto 5: if x[i] > 0: 1 else: 2 fi | |
| 260 # ... % This line will be indented (because of the unterminated `for`) | |
| 261 if Weight(prev_text) > 0 | |
| 262 return DecreaseIndentOnClosingTag(indent(lnum) + shiftwidth()) | |
| 7 | 263 endif |
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264 |
| 29885 | 265 # Unterminated statements cause indentation to kick in. |
| 266 # | |
| 267 # Example: | |
| 268 # | |
| 269 # draw unitsquare | |
| 270 # withcolor black; % This line is indented because of `draw`. | |
| 271 # x := a + b + c | |
| 272 # + d + e; % This line is indented because of `:=`. | |
| 273 # | |
| 274 var i = LastValidMatchEnd(prev_text, MP_STATEMENT, 0) | |
| 275 if i >= 0 # Does the line contain a statement? | |
| 276 if ValidMatchEnd(prev_text, ';', i) < 0 # Is the statement unterminated? | |
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277 return indent(lnum) + shiftwidth() |
| 7 | 278 else |
| 29885 | 279 return DecreaseIndentOnClosingTag(indent(lnum)) |
| 7 | 280 endif |
| 281 endif | |
| 282 | |
| 29885 | 283 # Deal with the special case of a statement spanning multiple lines. If the |
| 284 # current reference line L ends with a semicolon, search backwards for | |
| 285 # another semicolon or a statement keyword. If the latter is found first, | |
| 286 # its line is used as the reference line for indenting the current line | |
| 287 # instead of L. | |
| 288 # | |
| 289 # Example: | |
| 290 # | |
| 291 # if cond: | |
| 292 # draw if a: z0 else: z1 fi | |
| 293 # shifted S | |
| 294 # scaled T; % L | |
| 295 # | |
| 296 # for i = 1 upto 3: % <-- Current line: this gets the same indent as `draw ...` | |
| 297 # | |
| 298 # NOTE: we get here only if L does not contain a statement (among those | |
| 299 # listed in g:MP_STATEMENT). | |
| 300 if ValidMatchEnd(prev_text, ';' .. EOL, 0) >= 0 # L ends with a semicolon | |
| 301 var stm_lnum = PrevNonBlankNonComment(lnum) | |
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302 while stm_lnum > 0 |
| 29885 | 303 prev_text = getline(stm_lnum) |
| 304 var sc_pos = LastValidMatchEnd(prev_text, ';', 0) | |
| 305 var stm_pos = ValidMatchEnd(prev_text, MP_STATEMENT, sc_pos) | |
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306 if stm_pos > sc_pos |
| 29885 | 307 lnum = stm_lnum |
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308 break |
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309 elseif sc_pos > stm_pos |
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310 break |
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311 endif |
| 29885 | 312 stm_lnum = PrevNonBlankNonComment(stm_lnum) |
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313 endwhile |
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314 endif |
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315 |
| 29885 | 316 return DecreaseIndentOnClosingTag(indent(lnum)) |
| 317 enddef | |
| 318 # }}} | |
| 7 | 319 |
| 29885 | 320 # vim: sw=2 fdm=marker |