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Diffstat (limited to 'vim/extline/autoload/extline.vim')
| -rw-r--r-- | vim/extline/autoload/extline.vim | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/vim/extline/autoload/extline.vim b/vim/extline/autoload/extline.vim new file mode 100644 index 0000000..ea9ec1a --- /dev/null +++ b/vim/extline/autoload/extline.vim @@ -0,0 +1,195 @@ +" Autoloads for Vim extline plugin. + +if exists("g:autoloaded_extline") + finish +endif +let g:autoloaded_extline = 1 + +" Save 'cpoptions' and set Vim default to enable line continuations. +let s:save_cpoptions = &cpoptions +set cpoptions&vim + +function! extline#lstrip(s) + return substitute(a:s, '^\s*', '', '') +endfunction + +function! extline#rstrip(s) + return substitute(a:s, '\s*$', '', '') +endfunction + +function! extline#strip(s) + return extline#lstrip(extline#rstrip(a:s)) +endfunction + +function! extline#leadingWhitespace(s) + return substitute(a:s, '^\s*\zs\(.*\)$', '', '') +endfunction + +function! extline#getMonochar(s) + let monochar = substitute(extline#strip(a:s), '^\(\S\)\1*$', '\1', '') + if len(monochar) > 1 + let monochar = '' + endif + return monochar +endfunction + +" Return monochar that is non-alphanumeric. +function! extline#getPuncMonochar(s) + let monochar = extline#getMonochar(a:s) + if match(monochar, '[:alnum:]') >= 0 + let monochar = '' + endif + return monochar +endfunction + +function! extline#firstNonEmpty(strings) + for s in a:strings + if s != '' + return s + endif + endfor + return a:strings[0] +endfunction + +function! extline#probeTitle(titleLineNum) + let titleText = getline(a:titleLineNum) + let title = extline#strip(titleText) + let titlePrefix = extline#leadingWhitespace(titleText) + if extline#getPuncMonochar(title) != '' + " Title cannot be a line of monochar punctuation characters. + let title = '' + endif + " Title Group + let tg = { + \ 'titleLineNum': a:titleLineNum, + \ 'title': title, + \ 'titlePrefix': titlePrefix, + \ 'overChar': '', + \ 'underChar': '', + \ } + + if title != '' + " Consider non-existing line numbers. + let overText = extline#strip(getline(a:titleLineNum - 1)) + let underText = extline#strip(getline(a:titleLineNum + 1)) + let tg['overChar'] = extline#getPuncMonochar(overText) + let tg['underChar'] = extline#getPuncMonochar(underText) + endif + return tg +endfunction + +function! extline#probeTitleNearby() + let lineNum = line('.') + let text = extline#strip(getline(lineNum)) + let monochar = extline#getPuncMonochar(text) + if text == '' || monochar != '' + let tg = extline#probeTitle(lineNum - 1) + if tg['title'] == '' + let tg = extline#probeTitle(lineNum + 1) + endif + else + let tg = extline#probeTitle(lineNum) + endif + return tg +endfunction + +function! extline#changeTitleLine(tg, lineType, lineTypePresent) + " lineType is 'over' or 'under' + " lineTypePresent is 1 or 0 to use or not use lineType. + let charType = a:lineType . 'Char' + if a:lineTypePresent && a:tg[charType] == '' + if charType == 'overChar' + let otherCharType = 'underChar' + exe a:tg['titleLineNum'] . 'copy ' . (a:tg['titleLineNum'] - 1) + let a:tg['titleLineNum'] = (a:tg['titleLineNum'] + 1) + else + let otherCharType = 'overChar' + exe a:tg['titleLineNum'] . 'copy ' . a:tg['titleLineNum'] + endif + let a:tg[charType] = a:tg[otherCharType] + if a:tg[charType] == '' + let a:tg[charType] = '=' + endif + endif + if !a:lineTypePresent && a:tg[charType] != '' + if charType == 'overChar' + exe (a:tg['titleLineNum'] - 1) . 'del' + let a:tg['titleLineNum'] = (a:tg['titleLineNum'] - 1) + else + exe (a:tg['titleLineNum'] + 1) . 'del' + endif + let a:tg[charType] = '' + endif +endfunction + +function! extline#updateTitle(tg) + let titleLineNum = a:tg['titleLineNum'] + let titleLen = len(a:tg['title']) + let underChar = a:tg['underChar'] + let overChar = a:tg['overChar'] + let titlePrefix = a:tg['titlePrefix'] + + if overChar != '' + let lineText = titlePrefix . repeat(overChar, titleLen) + exe (titleLineNum - 1) . 's/^.*/\=lineText/g' + endif + exe titleLineNum + normal! $ + if underChar != '' + let lineText = titlePrefix . repeat(underChar, titleLen) + exe (titleLineNum + 1) . 's/^.*/\=lineText/g' + normal! $ + endif +endfunction + +function! extline#makeTitle(forceMonochar, useOver, useUnder) + let tg = extline#probeTitleNearby() + if tg['title'] != '' + " Always add a line before removing the other line. + if a:useOver + call extline#changeTitleLine(tg, 'over', a:useOver) + call extline#changeTitleLine(tg, 'under', a:useUnder) + else + call extline#changeTitleLine(tg, 'under', a:useUnder) + call extline#changeTitleLine(tg, 'over', a:useOver) + endif + if a:forceMonochar != '' + if a:useOver + let tg['overChar'] = a:forceMonochar + endif + if a:useUnder + let tg['underChar'] = a:forceMonochar + endif + endif + call extline#updateTitle(tg) + endif + return tg['title'] != '' +endfunction + +function! extline#makeHline() + let lineNum = line('.') + let t = extline#rstrip(getline(lineNum)) + let monochar = extline#getMonochar(t) + if monochar != '' + let lineText = (t . repeat(monochar, 80))[:77] + exe 's/^.*/' . escape(lineText, '/') . '/g' + normal! $ + endif +endfunction + +function! extline#autoTitle() + let tg = extline#probeTitleNearby() + if tg['title'] != '' + if tg['overChar'] == '' && tg['underChar'] == '' + if tg['titleLineNum'] > line(".") + " Title was after cursor line, use overTitle. + call extline#changeTitleLine(tg, 'over', 1) + else + call extline#changeTitleLine(tg, 'under', 1) + endif + endif + call extline#updateTitle(tg) + else + call extline#makeHline() + endif +endfunction |