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Adds new option to create anchors on headings #70

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Adds new option to create anchors on headings #70

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50 changes: 46 additions & 4 deletions ftplugin/markdown.vim
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,10 @@ if !exists("g:vmt_include_headings_before")
let g:vmt_include_headings_before = 0
endif

if !exists("g:vmt_insert_anchors")
let g:vmt_insert_anchors = 0
endif

let g:GFMHeadingIds = {}

let s:supportMarkdownStyles = ['GFM', 'Redcarpet', 'GitLab', 'Marked']
Expand Down Expand Up @@ -129,7 +133,7 @@ function! s:GetHeadingLines()
endif
" ===

call add(l:headingLines, l:line)
call add(l:headingLines, [l:line, l:lineNum])
endif
let l:flags = "W"
endwhile
Expand Down Expand Up @@ -255,6 +259,20 @@ function! GetHeadingLinkTest(headingLine, markdownStyle)
return <SID>GetHeadingLink(l:headingName, a:markdownStyle)
endfunction

function! s:GenerateAnchor(headingLine, line, markdownStyle, isModeline)
let l:anchorText = []
if g:vmt_dont_insert_fence == 0
call add(l:anchorText, <SID>GetBeginFence(a:markdownStyle, a:isModeline))
call add(l:anchorText, "") "Add newline
endif
call add(l:anchorText, "<a name='". <SID>GetHeadingLink(a:headingLine, a:markdownStyle) ."'></a>")
call add(l:anchorText, "") "Add newline
if g:vmt_dont_insert_fence == 0
call add(l:anchorText, <SID>GetEndFence())
endif
call append(a:line, l:anchorText)
endfunction

function! s:GenToc(markdownStyle)
call <SID>GenTocInner(a:markdownStyle, 0)
endfunction
Expand All @@ -265,12 +283,15 @@ function! s:GenTocInner(markdownStyle, isModeline)
return
endif

let l:headingLines = <SID>GetHeadingLines()
let l:fullHeadingLines = <SID>GetHeadingLines()
let l:headingLines = deepcopy(l:fullHeadingLines)
call map(l:headingLines, {_, val -> val[0]})
let l:levels = []
let l:listItemChars = [g:vmt_list_item_char]
let l:currentOffset = line('.')

let g:GFMHeadingIds = {}

for headingLine in l:headingLines
call add(l:levels, <SID>GetHeadingLevel(headingLine))
endfor
Expand Down Expand Up @@ -312,6 +333,16 @@ function! s:GenTocInner(markdownStyle, isModeline)
if g:vmt_dont_insert_fence == 0
silent put =<SID>GetEndFence()
endif

let l:currentOffset = line('.') - l:currentOffset - 1

if g:vmt_insert_anchors == 1
call reverse(l:fullHeadingLines)
for headingLine in l:fullHeadingLines
let l:offset = headingLine[1] + l:currentOffset
call <SID>GenerateAnchor(headingLine[0], l:offset, a:markdownStyle, a:isModeline)
endfor
endif
endfunction

function! s:GetIndentText()
Expand Down Expand Up @@ -406,7 +437,7 @@ function! s:DeleteExistingToc()
keepjumps normal! gg0

let l:markdownStyle = <SID>GetMarkdownStyleInModeline()

let l:isModeline = 0

if index(s:supportMarkdownStyles, l:markdownStyle) != -1
Expand Down Expand Up @@ -454,6 +485,17 @@ function! s:DeleteExistingToc()
echom "Cannot find toc begin fence"
endif

"Delete anchors
while search(l:tocBeginPattern, "Wc") != 0
let l:anchorBeginLineNumber = line(".")
if search(l:tocEndPattern, "W") != 0
let l:anchorEndLineNumber = line(".")
silent execute l:anchorBeginLineNumber. "," . l:anchorEndLineNumber. "delete_"
else
echom "Cannot find toc end fence"
endif
endwhile

call winrestview(l:winview)

return [l:markdownStyle, l:beginLineNumber, l:endLineNumber, l:isModeline]
Expand Down