X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/68b949e8db41482cef78403b76b8deb750fb268f..ad8729c321bb27c90f2f5d1ae932a7ed59ad03e6:/ftplugin/mkd.vim diff --git a/ftplugin/mkd.vim b/ftplugin/mkd.vim index d390c3b..4e9f448 100644 --- a/ftplugin/mkd.vim +++ b/ftplugin/mkd.vim @@ -1,6 +1,18 @@ "TODO print messages when on visual mode. I only see VISUAL, not the messages. -" This is how you should view things: +" 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 " | @@ -26,14 +38,50 @@ " |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*######[^#]' +\ } -let s:headerExpr = '\v^(\s*#|.+\n(\=+|-+)$)' +" Maches any header level of any type. +" +" This could be deduced from `s:levelRegexpDict`, but it is more +" efficient to have a single regexp for this. +" +let s:headersRegexp = '\v^(\s*#|.+\n(\=+|-+)$)' -" Return 0 if not found, else the actual line number. +" 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_GetLineNumCurHeader() - echo s:headerExpr - return search(s:headerExpr, 'bcnW') +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. @@ -43,169 +91,228 @@ endfunction " print a warning " Return `0`. " -function! b:Markdown_GoCurHeader() - let l:lineNum = b:Markdown_GetLineNumCurHeader() +function! b:Markdown_MoveToCurHeader() + let l:lineNum = b:Markdown_GetHeaderLineNum() if l:lineNum != 0 call cursor(l:lineNum, 1) else - echo 'error: outside any header' + echo 'outside any header' "normal! gg - end + endif return l:lineNum endfunction -" Put cursor on next header of any level. +" Move cursor to next header of any level. " " If there are no more headers, print a warning. " -function! b:Markdown_GoNextHeader() - if search(s:headerExpr, 'W') == 0 +function! b:Markdown_MoveToNextHeader() + if search(s:headersRegexp, 'W') == 0 "normal! G - echo 'error: no next header' - end + echo 'no next header' + endif endfunction -" Put cursor on previous header (before current) of any level. +" Move cursor to previous header (before current) of any level. " " If it does not exist, print a warning. " -function! b:Markdown_GoPreviousHeader() - let l:oldPos = getpos('.') - let l:curHeaderLineNumber = b:Markdown_GoCurHeader() - if l:curHeaderLineNumber == 0 - call setpos('.', l:oldPos) - end - if search(s:headerExpr, 'bW') == 0 - "normal! gg - call setpos('.', l:oldPos) - echo 'error: no previous header' - end +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 inside a header, cursor goes to it. -" Return its hashes. +" - if line is inside a header, return the header level (h1 -> 1, h2 -> 2, etc.). " -"- if on top level outside any headers, -" print a warning -" return '' +" - if line is at top level outside any headers, return `0`. " -function! b:Markdown_GoCurHeaderGetHashes() - let l:linenum = b:Markdown_GetLineNumCurHeader() +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) - return matchlist(getline(linenum), '\v^\s*(#+)')[1] else - return '' - end + 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 -" Put cursor on previous header of any level. +" Return the line number of the previous header of given level. +" in relation to line `a:1`. If not given, `a:1 = getline()` " -" If it exists, return its lines number. +" `a:1` line is included, and this may return the current header. " -" Otherwise, print a warning and return `0`. +" If none return 0. " -function! b:Markdown_GoHeaderUp() - let l:oldPos = getpos('.') - let l:hashes = b:Markdown_GoCurHeaderGetHashes() - if len(l:hashes) > 1 - call search('^\s*' . l:hashes[1:] . '[^#]', 'b') +function! b:Markdown_GetPreviousHeaderLineNumberAtLevel(level, ...) + if a:0 == 0 + let l:line = line('.') else - call setpos('.', l:oldPos) - echo 'error: already at top level' - end + 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 -" If no more next siblings, print error message and do nothing. +" Move cursor to next sibling header. +" +" If there is no next siblings, print a warning and don't move. " -function! b:Markdown_GoNextSiblingHeader() - let l:oldPos = getpos('.') - let l:hashes = b:Markdown_GoCurHeaderGetHashes() - let l:noSibling = 0 - if l:hashes ==# '' - let l:noSibling = 1 +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:nhashes = len(l:hashes) - if l:nhashes == 1 - "special case, just add the largest possible value - let l:nextLowerLevelLine = line('$') + 1 - else - let l:nextLowerLevelLine = search('\v^\s*#{1,' . (l:nhashes - 1) . '}[^#]' , 'nW') - end - let l:nextSameLevelLine = search('\v^\s*' . l:hashes . '[^#]', 'nW') - if ( - \ l:nextSameLevelLine > 0 - \ && - \ ( - \ l:nextLowerLevelLine == 0 - \ || - \ l:nextLowerLevelLine > l:nextSameLevelLine - \ ) - \ ) - call cursor(l:nextSameLevelLine, 1) + let l:nextHeaderSameLevelParentLineNumber = b:Markdown_GetParentHeaderLineNumber(l:nextHeaderSameLevelLineNumber) + if l:curHeaderParentLineNumber == l:nextHeaderSameLevelParentLineNumber + call cursor(l:nextHeaderSameLevelLineNumber, 1) else - let l:noSibling = 1 - end - end - if l:noSibling - call setpos('.', l:oldPos) - echo 'error: no next sibling' - end + let l:noNextSibling = 1 + endif + endif + if l:noNextSibling + echo 'no next sibling header' + endif endfunction -"if no more next siblings, print error message and do nothing. -function! b:Markdown_GoPreviousSiblingHeader() - let l:oldPos = getpos('.') - let l:hashes = b:Markdown_GoCurHeaderGetHashes() - let l:noSibling = 0 - if l:hashes ==# '' - let l:noSibling = 1 +" 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:nhashes = len(l:hashes) - if l:nhashes == 1 - "special case, just add the largest possible value - let l:prevLowerLevelLine = -1 - else - let l:prevLowerLevelLine = search('\v^\s*#{1,' . (l:nhashes - 1) . '}[^#]' , 'bnW') - end - let l:prevSameLevelLine = search('\v^\s*' . l:hashes . '[^#]', 'bnW') - if ( - \ l:prevSameLevelLine > 0 - \ && - \ ( - \ l:prevLowerLevelLine == 0 - \ || - \ l:prevLowerLevelLine < l:prevSameLevelLine - \ ) - \) - call cursor(l:prevSameLevelLine, 1) + let l:previousHeaderSameLevelParentLineNumber = b:Markdown_GetParentHeaderLineNumber(l:previousHeaderSameLevelLineNumber) + if l:curHeaderParentLineNumber == l:previousHeaderSameLevelParentLineNumber + call cursor(l:previousHeaderSameLevelLineNumber, 1) else - let l:noSibling = 1 - end - end - if l:noSibling - call setpos('.', l:oldPos) - echo 'error: no previous sibling' - end + let l:noPreviousSibling = 1 + endif + endif + if l:noPreviousSibling + echo 'no previous sibling header' + endif endfunction -"wrapper to do move commands in visual mode +" 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 +" 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_GoNextHeader') -call MapNormVis('[[', 'b:Markdown_GoPreviousHeader') -call MapNormVis('][', 'b:Markdown_GoNextSiblingHeader') -call MapNormVis('[]', 'b:Markdown_GoPreviousSiblingHeader') -"menmonic: Up -call MapNormVis(']u', 'b:Markdown_GoHeaderUp') -"menmonic: Current -call MapNormVis(']c', 'b:Markdown_GoCurHeader') +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')