115 lines
3.5 KiB
VimL
115 lines
3.5 KiB
VimL
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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" Vim indent file
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"
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" Language: JSX (JavaScript)
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" Maintainer: Max Wang <mxawng@gmail.com>
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"
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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" Save the current JavaScript indentexpr.
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let b:jsx_js_indentexpr = &indentexpr
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" Prologue; load in XML indentation.
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if exists('b:did_indent')
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let s:did_indent=b:did_indent
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unlet b:did_indent
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endif
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exe 'runtime! indent/xml.vim'
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if exists('s:did_indent')
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let b:did_indent=s:did_indent
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endif
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setlocal indentexpr=GetJsxIndent()
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" JS indentkeys
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setlocal indentkeys=0{,0},0),0],0\,,!^F,o,O,e
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" XML indentkeys
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setlocal indentkeys+=*<Return>,<>>,<<>,/
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" Multiline end tag regex (line beginning with '>' or '/>')
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let s:endtag = '^\s*\/\?>\s*;\='
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" Get all syntax types at the beginning of a given line.
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fu! SynSOL(lnum)
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return map(synstack(a:lnum, 1), 'synIDattr(v:val, "name")')
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endfu
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" Get all syntax types at the end of a given line.
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fu! SynEOL(lnum)
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let lnum = prevnonblank(a:lnum)
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let col = strlen(getline(lnum))
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return map(synstack(lnum, col), 'synIDattr(v:val, "name")')
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endfu
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" Check if a syntax attribute is XMLish.
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fu! SynAttrXMLish(synattr)
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return a:synattr =~ "^xml" || a:synattr =~ "^jsx"
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endfu
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" Check if a synstack is XMLish (i.e., has an XMLish last attribute).
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fu! SynXMLish(syns)
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return SynAttrXMLish(get(a:syns, -1))
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endfu
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" Check if a synstack denotes the end of a JSX block.
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fu! SynJSXBlockEnd(syns)
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return get(a:syns, -1) =~ '\%(js\|javascript\)Braces' &&
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\ SynAttrXMLish(get(a:syns, -2))
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endfu
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" Determine how many jsxRegions deep a synstack is.
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fu! SynJSXDepth(syns)
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return len(filter(copy(a:syns), 'v:val ==# "jsxRegion"'))
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endfu
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" Check whether `cursyn' continues the same jsxRegion as `prevsyn'.
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fu! SynJSXContinues(cursyn, prevsyn)
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let curdepth = SynJSXDepth(a:cursyn)
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let prevdepth = SynJSXDepth(a:prevsyn)
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" In most places, we expect the nesting depths to be the same between any
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" two consecutive positions within a jsxRegion (e.g., between a parent and
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" child node, between two JSX attributes, etc.). The exception is between
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" sibling nodes, where after a completed element (with depth N), we return
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" to the parent's nesting (depth N - 1). This case is easily detected,
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" since it is the only time when the top syntax element in the synstack is
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" jsxRegion---specifically, the jsxRegion corresponding to the parent.
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return prevdepth == curdepth ||
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\ (prevdepth == curdepth + 1 && get(a:cursyn, -1) ==# 'jsxRegion')
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endfu
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" Cleverly mix JS and XML indentation.
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fu! GetJsxIndent()
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let cursyn = SynSOL(v:lnum)
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let prevsyn = SynEOL(v:lnum - 1)
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" Use XML indenting iff:
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" - the syntax at the end of the previous line was either JSX or was the
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" closing brace of a jsBlock whose parent syntax was JSX; and
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" - the current line continues the same jsxRegion as the previous line.
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if (SynXMLish(prevsyn) || SynJSXBlockEnd(prevsyn)) &&
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\ SynJSXContinues(cursyn, prevsyn)
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let ind = XmlIndentGet(v:lnum, 0)
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" Align '/>' and '>' with '<' for multiline tags.
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if getline(v:lnum) =~? s:endtag
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let ind = ind - &sw
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endif
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" Then correct the indentation of any JSX following '/>' or '>'.
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if getline(v:lnum - 1) =~? s:endtag
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let ind = ind + &sw
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endif
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else
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if len(b:jsx_js_indentexpr)
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" Invoke the base JS package's custom indenter. (For vim-javascript,
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" e.g., this will be GetJavascriptIndent().)
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let ind = eval(b:jsx_js_indentexpr)
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else
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let ind = cindent(v:lnum)
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endif
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endif
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return ind
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endfu
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