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136 lines
3.4 KiB
VimL
136 lines
3.4 KiB
VimL
11 years ago
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" # Configuration
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if !exists('g:instant_markdown_slow')
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let g:instant_markdown_slow = 0
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endif
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if !exists('g:instant_markdown_autostart')
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let g:instant_markdown_autostart = 1
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endif
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" # Utility Functions
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" Simple system wrapper that ignores empty second args
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function! s:system(cmd, stdin)
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if strlen(a:stdin) == 0
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call system(a:cmd)
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else
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call system(a:cmd, a:stdin)
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endif
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endfu
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function! s:refreshView()
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let bufnr = expand('<bufnr>')
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call s:system("curl -X PUT -T - http://localhost:8090/ &>/dev/null &",
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\ s:bufGetContents(bufnr))
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endfu
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function! s:startDaemon(initialMD)
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call s:system("instant-markdown-d &>/dev/null &", a:initialMD)
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endfu
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function! s:initDict()
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if !exists('s:buffers')
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let s:buffers = {}
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endif
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endfu
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function! s:pushBuffer(bufnr)
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call s:initDict()
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let s:buffers[a:bufnr] = 1
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endfu
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function! s:popBuffer(bufnr)
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call s:initDict()
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call remove(s:buffers, a:bufnr)
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endfu
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function! s:killDaemon()
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call system("curl -s -X DELETE http://localhost:8090/ &>/dev/null &")
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endfu
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function! s:bufGetContents(bufnr)
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return join(getbufline(a:bufnr, 1, "$"), "\n")
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endfu
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" I really, really hope there's a better way to do this.
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fu! s:myBufNr()
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return str2nr(expand('<abuf>'))
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endfu
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" # Functions called by autocmds
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"
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" ## push a new Markdown buffer into the system.
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"
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" 1. Track it so we know when to garbage collect the daemon
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" 2. Start daemon if we're on the first MD buffer.
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" 3. Initialize changedtickLast, possibly needlessly(?)
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fu! s:pushMarkdown()
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let bufnr = s:myBufNr()
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call s:initDict()
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if len(s:buffers) == 0
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call s:startDaemon(s:bufGetContents(bufnr))
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endif
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call s:pushBuffer(bufnr)
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let b:changedtickLast = b:changedtick
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endfu
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" ## pop a Markdown buffer
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"
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" 1. Pop the buffer reference
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" 2. Garbage collection
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" * daemon
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" * autocmds
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fu! s:popMarkdown()
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let bufnr = s:myBufNr()
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silent au! instant-markdown * <buffer=abuf>
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call s:popBuffer(bufnr)
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if len(s:buffers) == 0
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call s:killDaemon()
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endif
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endfu
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" ## Refresh if there's something new worth showing
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"
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" 'All things in moderation'
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fu! s:temperedRefresh()
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if !exists('b:changedtickLast')
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let b:changedtickLast = b:changedtick
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elseif b:changedtickLast != b:changedtick
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let b:changedtickLast = b:changedtick
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call s:refreshView()
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endif
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endfu
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fu! s:previewMarkdown()
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call s:startDaemon(join(getline(1, '$'), "\n"))
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aug instant-markdown
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if g:instant_markdown_slow
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au CursorHold,BufWrite,InsertLeave <buffer> call s:temperedRefresh()
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else
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au CursorHold,CursorHoldI,CursorMoved,CursorMovedI <buffer> call s:temperedRefresh()
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endif
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au BufWinLeave <buffer> call s:cleanUp()
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aug END
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endfu
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fu! s:cleanUp()
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call s:killDaemon()
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au! instant-markdown * <buffer>
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endfu
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if g:instant_markdown_autostart
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" # Define the autocmds "
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aug instant-markdown
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au! * <buffer>
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au BufEnter <buffer> call s:refreshView()
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if g:instant_markdown_slow
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au CursorHold,BufWrite,InsertLeave <buffer> call s:temperedRefresh()
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else
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au CursorHold,CursorHoldI,CursorMoved,CursorMovedI <buffer> call s:temperedRefresh()
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endif
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au BufWinLeave <buffer> call s:popMarkdown()
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au BufwinEnter <buffer> call s:pushMarkdown()
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aug END
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else
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command! -buffer InstantMarkdownPreview call s:previewMarkdown()
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endif
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