X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/291fa48a67c77ced79a33db8fe9d71dfe04004ac..8b892fdff239355a89871f7a094cbc85ea5fc736:/ftplugin/mkd.vim diff --git a/ftplugin/mkd.vim b/ftplugin/mkd.vim index 0f5d82d..4e9f448 100644 --- a/ftplugin/mkd.vim +++ b/ftplugin/mkd.vim @@ -1,166 +1,318 @@ -"TODO get working on visual mode - -"- if inside a header -" goes to the nearest head before current position -" returns its initial hashes (#) -"- else -" goes to beginning of document -" returns '' -fu! b:Markdown_GoCurHeader() - if search( '^#', 'bcW' ) != 0 - return matchstr( getline('.'), '\v^#+' ) - el - norm! gg - ec 'outside any header' - return '' - en -endf - -"same as `b:Markdown_GoCurHeader`:function: but does not change cursor position -fu! b:Markdown_GetHashesCurHeader() - let line = search( '\v^#', 'nW' ) != 0 - retu matchstr( getline(line) '\v^#+' ) -endf - -"goes to next header of any level -"returns its hashes -fu! b:Markdown_GoNextHeader() - if search( '\v^#', 'W' ) != 0 - return matchstr( getline('.'), '\v^#+' ) - el - "norm! G - ec 'no more headers' - return '' - en -endf - -"goes to previous header of any level -" -"if there is no previous header, only print a warning -" -"if the cursor is not exactly at the header, -"it goes to exactly the header. So this could be used -"if you want to go to the current header line. -fu! b:Markdown_GoPreviousHeader() - if search( '^#', 'bW' ) != 0 - return matchstr( getline('.'), '\v^#+' ) - el - "norm! gg - ec 'no more headers' - return '' - en -endf - -"if already at top level, go to beginning of buffer -fu! b:Markdown_GoHeaderUp() - let l:hashes = b:Markdown_GoCurHeader() - if len( l:hashes ) > 1 - cal search( '^' . l:hashes[1:] . '[^#]', 'b' ) - el - norm! gg - en -endf - -fu! b:Markdown_GoNextHeaderSameLevel() - - let l:hashes = b:Markdown_GoCurHeader() - - "go to next occurrence of that number of hashes - cal search( '^' . l:hashes . '[^#]', 'W' ) - -endf - -"if no more next siblings, print error message and do nothing. -fu! b:Markdown_GoNextSiblingHeader() - - let l:hashes = b:Markdown_GoCurHeader() - - if l:hashes ==# '' - retu - en - - 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, 0 ) - el - ec 'no more siblings' - en - -endf - -fu! b:Markdown_GoPreviousHeaderSameLevel() - - let l:hashes = b:Markdown_GoCurHeader() - - "go to next occurrence of that number of hashes - cal search( '^' . l:hashes . '[^#]', 'bW' ) - -endf - -"if no more next siblings, print error message and do nothing. -fu! b:Markdown_GoPreviousSiblingHeader() - - let l:hashes = b:Markdown_GoCurHeader() - - if l:hashes ==# '' - retu - en - - 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, 0 ) - el - ec 'no more siblings' - en - -endf - -"mnemonics: ']' next (like a right arrow) -nn ]] :cal b:Markdown_GoNextHeader() -"vnoremap ]] /^#:nohlgv - -"mnemonics: '[' next (like a left arrow) -nn ][ :cal b:Markdown_GoNextSiblingHeader() -"vnoremap ][ :cal b:Markdown_GoNextHeaderSameLevel() - -nn [] :cal b:Markdown_GoPreviousSiblingHeader() +"TODO print messages when on visual mode. I only see VISUAL, not the messages. -nn [[ :cal b:Markdown_GoPreviousHeader() -"vnoremap [[ ?^#:nohlgv +" 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 + 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 + 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 -"go up one level. Menmonic: Up. -nn ]u :cal b:Markdown_GoHeaderUp() +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')