X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/b91f1039e1ea91d681628d8bf73d46d48430d76f..7305d5167800429dd4c75ce5954a098f3c9cb72c:/ftplugin/mkd.vim diff --git a/ftplugin/mkd.vim b/ftplugin/mkd.vim index c859565..4e9f448 100644 --- a/ftplugin/mkd.vim +++ b/ftplugin/mkd.vim @@ -1,208 +1,318 @@ "TODO print messages when on visual mode. I only see VISUAL, not the messages. -"this is how you should view things: -" -" |BUFFER -" | -" |outside any header -" | -"a-+# a -" | -" |inside a -" | -"a-+ -"b-+## b -" | -" |inside b -" | -"b-+ -"c-+### c -" | -" |inside c -" | -"c-+ -"d-|# d -" | -" |inside d -" | -"d-+ - -let s:headerExpr = '\v^#' - -"0 if not found -fu! b:Markdown_GetLineNumCurHeader() - retu search( s:headerExpr, 'bcnW' ) -endf - -"- if inside a header goes to it -" returns its hashes -"- if on top level outside any headers, -" print a warning -" return '' -fu! b:Markdown_GoCurHeaderGetHashes() - let l:lineNum = b:Markdown_GetLineNumCurHeader() - if l:lineNum != 0 - cal cursor( l:lineNum, 1 ) - retu matchstr( getline( lineNum ), '\v^#+' ) - el - retu '' - en -endf - -"- if inside a header goes to it -" returns its line number -"- if on top level outside any headers, -" print a warning -" return 0 -fu! b:Markdown_GoCurHeader() - let l:lineNum = b:Markdown_GetLineNumCurHeader() +" Function interface phylosophy: +" +" - functions take arbitrary line numbers as parameters. +" Current cursor line is only a suitable default parameter. +" +" - only functions that bind directly to user actions: +" +" - print error messages. +" All intermediate functions limit themselves return `0` to indicate an error. +" +" - move the cursor. All other functions do not move the cursor. +" +" This is how you should view headers: +" +" |BUFFER +" | +" |Outside any header +" | +" a-+# a +" | +" |Inside a +" | +" a-+ +" b-+## b +" | +" |inside b +" | +" b-+ +" c-+### c +" | +" |Inside c +" | +" c-+ +" d-|# d +" | +" |Inside d +" | +" d-+ +" e-|e +" |==== +" | +" |Inside e +" | +" e-+ + +" For each level, contains the regexp that matches at that level only. +let s:levelRegexpDict = { + \ 1: '\v^(\s*#[^#]|.+\n\=+$)', + \ 2: '\v^(\s*##[^#]|.+\n-+$)', + \ 3: '\v^\s*###[^#]', + \ 4: '\v^\s*####[^#]', + \ 5: '\v^\s*#####[^#]', + \ 6: '\v^\s*######[^#]' +\ } + +" Maches any header level of any type. +" +" This could be deduced from `s:levelRegexpDict`, but it is more +" efficient to have a single regexp for this. +" +let s:headersRegexp = '\v^(\s*#|.+\n(\=+|-+)$)' + +" Returns the line number of the first header before `line`, called the +" current header. +" +" If there is no current header, return `0`. +" +" @param a:1 The line to look the header of. Default value: `getpos('.')`. +" +function! b:Markdown_GetHeaderLineNum(...) + if a:0 == 0 + let l:l = line('.') + else + let l:l = a:1 + endif + while(l:l > 0) + if join(getline(l:l, l:l + 1), "\n") =~ s:headersRegexp + return l:l + endif + let l:l -= 1 + endwhile + return 0 +endfunction + +" - if inside a header goes to it. +" Return its line number. +" +" - if on top level outside any headers, +" print a warning +" Return `0`. +" +function! b:Markdown_MoveToCurHeader() + let l:lineNum = b:Markdown_GetHeaderLineNum() if l:lineNum != 0 - cal cursor( l:lineNum, 1 ) - el - ec 'outside any header' - "norm! gg - en - retu l:lineNum -endf - -"goes to next header of any level -" -"if no there are no more headers print a warning -fu! b:Markdown_GoNextHeader() - if search( s:headerExpr, 'W' ) == 0 - "norm! G - ec 'no next header' - en -endf - -"goes to previous header of any level -" -"if it does not exist, print a warning -fu! b:Markdown_GoPreviousHeader() - let l:oldPos = getpos('.') - let l:curHeaderLineNumber = b:Markdown_GoCurHeader() - if l:curHeaderLineNumber == 0 - cal setpos('.',l:oldPos) - en - if search( s:headerExpr, 'bW' ) == 0 - "norm! gg - cal setpos('.',l:oldPos) - ec 'no previous header' - en -endf - -"goes to previous header of any level -" -"if it exists, return its lines number -" -"otherwise, print a warning and return 0 -fu! b:Markdown_GoHeaderUp() - let l:oldPos = getpos('.') - let l:hashes = b:Markdown_GoCurHeaderGetHashes() - if len( l:hashes ) > 1 - cal search( '^' . l:hashes[1:] . '[^#]', 'b' ) - el - cal setpos('.',l:oldPos) - ec 'already at top level' - en -endf - -"if no more next siblings, print error message and do nothing. -fu! b:Markdown_GoNextSiblingHeader() - let l:oldPos = getpos('.') - let l:hashes = b:Markdown_GoCurHeaderGetHashes() - let l:noSibling = 0 - - if l:hashes ==# '' - let l:noSibling = 1 - el - let l:nhashes = len(l:hashes) - if l:nhashes == 1 - "special case, just add the largest possible value - let l:nextLowerLevelLine = line('$') + 1 - el - let l:nextLowerLevelLine = search( '\v^#{1,' . ( l:nhashes - 1 ) . '}[^#]' , 'nW' ) - en - - let l:nextSameLevelLine = search( '\v^' . l:hashes . '[^#]', 'nW' ) - if ( - \ l:nextSameLevelLine > 0 - \ && - \ ( - \ l:nextLowerLevelLine == 0 - \ || - \ l:nextLowerLevelLine > l:nextSameLevelLine - \ ) - \ ) - cal cursor( l:nextSameLevelLine, 1 ) - el - let l:noSibling = 1 - en - en - - if l:noSibling - cal setpos('.',l:oldPos) - ec 'no next sibling' - en -endf - -"if no more next siblings, print error message and do nothing. -fu! b:Markdown_GoPreviousSiblingHeader() - let l:oldPos = getpos('.') - let l:hashes = b:Markdown_GoCurHeaderGetHashes() - let l:noSibling = 0 - - if l:hashes ==# '' - let l:noSibling = 1 - el - let l:nhashes = len(l:hashes) - if l:nhashes == 1 - "special case, just add the largest possible value - let l:prevLowerLevelLine = -1 - el - let l:prevLowerLevelLine = search( '\v^#{1,' . ( l:nhashes - 1 ) . '}[^#]' , 'bnW' ) - en - - let l:prevSameLevelLine = search( '\v^' . l:hashes . '[^#]', 'bnW' ) - if ( - \ l:prevSameLevelLine > 0 - \ && - \ ( - \ l:prevLowerLevelLine == 0 - \ || - \ l:prevLowerLevelLine < l:prevSameLevelLine - \ ) - \ ) - cal cursor( l:prevSameLevelLine, 1 ) - el - let l:noSibling = 1 - en - en - - if l:noSibling - cal setpos('.',l:oldPos) - ec 'no previous sibling' - en - -endf - -"wrapper to do move commands in visual mode -fu! s:VisMove(f) + call cursor(l:lineNum, 1) + else + echo 'outside any header' + "normal! gg + endif + return l:lineNum +endfunction + +" Move cursor to next header of any level. +" +" If there are no more headers, print a warning. +" +function! b:Markdown_MoveToNextHeader() + if search(s:headersRegexp, 'W') == 0 + "normal! G + echo 'no next header' + endif +endfunction + +" Move cursor to previous header (before current) of any level. +" +" If it does not exist, print a warning. +" +function! b:Markdown_MoveToPreviousHeader() + let l:curHeaderLineNumber = b:Markdown_GetHeaderLineNum() + let l:noPreviousHeader = 0 + if l:curHeaderLineNumber <= 1 + let l:noPreviousHeader = 1 + else + let l:previousHeaderLineNumber = b:Markdown_GetHeaderLineNum(l:curHeaderLineNumber - 1) + if l:previousHeaderLineNumber == 0 + let l:noPreviousHeader = 1 + else + call cursor(l:previousHeaderLineNumber, 1) + endif + endif + if l:noPreviousHeader + echo 'no previous header' + endif +endfunction + +" - if line is inside a header, return the header level (h1 -> 1, h2 -> 2, etc.). +" +" - if line is at top level outside any headers, return `0`. +" +function! b:Markdown_GetHeaderLevel(...) + if a:0 == 0 + let l:line = line('.') + else + let l:line = a:1 + endif + let l:linenum = b:Markdown_GetHeaderLineNum(l:line) + if l:linenum != 0 + return b:Markdown_GetLevelOfHeaderAtLine(l:linenum) + else + return 0 + endif +endfunction + +" Returns the level of the header at the given line. +" +" If there is no header at the given line, returns `0`. +" +function! b:Markdown_GetLevelOfHeaderAtLine(linenum) + let l:lines = join(getline(a:linenum, a:linenum + 1), "\n") + for l:key in keys(s:levelRegexpDict) + if l:lines =~ get(s:levelRegexpDict, l:key) + return l:key + endif + endfor + return 0 +endfunction + +" Move cursor to parent header of the current header. +" +" If it does not exit, print a warning and do nothing. +" +function! b:Markdown_MoveToParentHeader() + let l:linenum = b:Markdown_GetParentHeaderLineNumber() + if l:linenum != 0 + call cursor(l:linenum, 1) + else + echo 'no parent header' + endif +endfunction + +" Return the line number of the parent header of line `line`. +" +" If it has no parent, return `0`. +" +function! b:Markdown_GetParentHeaderLineNumber(...) + if a:0 == 0 + let l:line = line('.') + else + let l:line = a:1 + endif + let l:level = b:Markdown_GetHeaderLevel(l:line) + if l:level > 1 + let l:linenum = b:Markdown_GetPreviousHeaderLineNumberAtLevel(l:level - 1, l:line) + return l:linenum + endif + return 0 +endfunction + +" Return the line number of the previous header of given level. +" in relation to line `a:1`. If not given, `a:1 = getline()` +" +" `a:1` line is included, and this may return the current header. +" +" If none return 0. +" +function! b:Markdown_GetNextHeaderLineNumberAtLevel(level, ...) + if a:0 < 1 + let l:line = line('.') + else + let l:line = a:1 + endif + let l:l = l:line + while(l:l <= line('$')) + if join(getline(l:l, l:l + 1), "\n") =~ get(s:levelRegexpDict, a:level) + return l:l + endif + let l:l += 1 + endwhile + return 0 +endfunction + +" Return the line number of the previous header of given level. +" in relation to line `a:1`. If not given, `a:1 = getline()` +" +" `a:1` line is included, and this may return the current header. +" +" If none return 0. +" +function! b:Markdown_GetPreviousHeaderLineNumberAtLevel(level, ...) + if a:0 == 0 + let l:line = line('.') + else + let l:line = a:1 + endif + let l:l = l:line + while(l:l > 0) + if join(getline(l:l, l:l + 1), "\n") =~ get(s:levelRegexpDict, a:level) + return l:l + endif + let l:l -= 1 + endwhile + return 0 +endfunction + +" Move cursor to next sibling header. +" +" If there is no next siblings, print a warning and don't move. +" +function! b:Markdown_MoveToNextSiblingHeader() + let l:curHeaderLineNumber = b:Markdown_GetHeaderLineNum() + let l:curHeaderLevel = b:Markdown_GetLevelOfHeaderAtLine(l:curHeaderLineNumber) + let l:curHeaderParentLineNumber = b:Markdown_GetParentHeaderLineNumber() + let l:nextHeaderSameLevelLineNumber = b:Markdown_GetNextHeaderLineNumberAtLevel(l:curHeaderLevel, l:curHeaderLineNumber + 1) + let l:noNextSibling = 0 + if l:nextHeaderSameLevelLineNumber == 0 + let l:noNextSibling = 1 + else + let l:nextHeaderSameLevelParentLineNumber = b:Markdown_GetParentHeaderLineNumber(l:nextHeaderSameLevelLineNumber) + if l:curHeaderParentLineNumber == l:nextHeaderSameLevelParentLineNumber + call cursor(l:nextHeaderSameLevelLineNumber, 1) + else + let l:noNextSibling = 1 + endif + endif + if l:noNextSibling + echo 'no next sibling header' + endif +endfunction + +" Move cursor to previous sibling header. +" +" If there is no previous siblings, print a warning and do nothing. +" +function! b:Markdown_MoveToPreviousSiblingHeader() + let l:curHeaderLineNumber = b:Markdown_GetHeaderLineNum() + let l:curHeaderLevel = b:Markdown_GetLevelOfHeaderAtLine(l:curHeaderLineNumber) + let l:curHeaderParentLineNumber = b:Markdown_GetParentHeaderLineNumber() + let l:previousHeaderSameLevelLineNumber = b:Markdown_GetPreviousHeaderLineNumberAtLevel(l:curHeaderLevel, l:curHeaderLineNumber - 1) + let l:noPreviousSibling = 0 + if l:previousHeaderSameLevelLineNumber == 0 + let l:noPreviousSibling = 1 + else + let l:previousHeaderSameLevelParentLineNumber = b:Markdown_GetParentHeaderLineNumber(l:previousHeaderSameLevelLineNumber) + if l:curHeaderParentLineNumber == l:previousHeaderSameLevelParentLineNumber + call cursor(l:previousHeaderSameLevelLineNumber, 1) + else + let l:noPreviousSibling = 1 + endif + endif + if l:noPreviousSibling + echo 'no previous sibling header' + endif +endfunction + +" Wrapper to do move commands in visual mode. +" +function! s:VisMove(f) norm! gv - cal function(a:f)() -endf - -"map in both normal and visual modes -fu! s:MapNormVis(rhs,lhs) - exe 'nn ' . a:rhs . ' :cal ' . a:lhs . '()' - exe 'vn ' . a:rhs . ' :cal VisMove(''' . a:lhs . ''')' -endf - -cal MapNormVis( ']]', 'b:Markdown_GoNextHeader' ) -cal MapNormVis( '[[', 'b:Markdown_GoPreviousHeader' ) -cal MapNormVis( '][', 'b:Markdown_GoNextSiblingHeader' ) -cal MapNormVis( '[]', 'b:Markdown_GoPreviousSiblingHeader' ) -"menmonic: Up -cal MapNormVis( ']u', 'b:Markdown_GoHeaderUp' ) -"menmonic: Current -cal MapNormVis( ']c', 'b:Markdown_GoCurHeader' ) + call function(a:f)() +endfunction + +" Map in both normal and visual modes. +" +function! s:MapNormVis(rhs,lhs) + execute 'nn ' . a:rhs . ' :call ' . a:lhs . '()' + execute 'vn ' . a:rhs . ' :call VisMove(''' . a:lhs . ''')' +endfunction + +call MapNormVis(']]', 'b:Markdown_MoveToNextHeader') +call MapNormVis('[[', 'b:Markdown_MoveToPreviousHeader') +call MapNormVis('][', 'b:Markdown_MoveToNextSiblingHeader') +call MapNormVis('[]', 'b:Markdown_MoveToPreviousSiblingHeader') +" Menmonic: Up +call MapNormVis(']u', 'b:Markdown_MoveToParentHeader') +" Menmonic: Current +call MapNormVis(']c', 'b:Markdown_MoveToCurHeader')