+function! s:NM_show_previous(can_change_thread, find_matching)
+ let everything = exists('b:nm_show_everything') ? b:nm_show_everything : 0
+ let info = b:nm_raw_info
+ let lnum = line('.')
+ for msg in reverse(copy(info['msgs']))
+ if a:find_matching && msg['match'] == '0'
+ continue
+ endif
+ if lnum <= msg['start']
+ continue
+ endif
+
+ exec printf('norm %dGzt', msg['start'])
+ " TODO: try to fit the message on screen
+ return
+ endfor
+ if !a:can_change_thread
+ return
+ endif
+ call <SID>NM_kill_this_buffer()
+ if line('.') > 1
+ norm k
+ call <SID>NM_search_show_thread(everything)
+ norm G
+ call <SID>NM_show_previous(0, a:find_matching)
+ else
+ echo 'No more messages.'
+ endif
+endfunction
+
+function! s:NM_show_next(can_change_thread, find_matching)
+ let info = b:nm_raw_info
+ let lnum = line('.')
+ for msg in info['msgs']
+ if a:find_matching && msg['match'] == '0'
+ continue
+ endif
+ if lnum >= msg['start']
+ continue
+ endif
+
+ exec printf('norm %dGzt', msg['start'])
+ " TODO: try to fit the message on screen
+ return
+ endfor
+ if a:can_change_thread
+ call <SID>NM_show_next_thread()
+ endif
+endfunction
+
+function! s:NM_show_next_thread()
+ let everything = exists('b:nm_show_everything') ? b:nm_show_everything : 0
+ call <SID>NM_kill_this_buffer()
+ if line('.') != line('$')
+ norm j
+ call <SID>NM_search_show_thread(everything)
+ else
+ echo 'No more messages.'
+ endif
+endfunction
+
+function! s:NM_show_archive_thread()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_mark_read_then_archive_thread()
+ call <SID>NM_add_remove_tags(b:nm_search_words, '-', ['unread', 'inbox'])
+ call <SID>NM_show_next_thread()
+endfunction
+
+function! s:NM_show_mark_read_then_next_open_message()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_previous_message()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_reply()
+ let cmd = ['reply']
+ call add(cmd, <SID>NM_show_message_id())
+ call add(cmd, 'AND')
+ call extend(cmd, <SID>NM_get_search_words())
+
+ let data = <SID>NM_run(cmd)
+ let lines = split(data, "\n")
+ call <SID>NM_newComposeBuffer(lines, 0)
+endfunction
+
+function! s:NM_show_view_all_mime_parts()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_view_raw_message()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_add_tag()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_remove_tag()
+ echo 'not implemented'
+endfunction
+
+" if entire message is not visible scroll down 1/2 page or less to get to the bottom of message
+" otherwise go to next message
+" any message that is viewed entirely has inbox and unread tags removed
+function! s:NM_show_advance_marking_read_and_archiving()
+ let advance_tags = ['unread', 'inbox']
+
+ let vis_top = line('w0')
+ let vis_bot = line('w$')
+
+ let msg_top = <SID>NM_show_get_message_for_line(vis_top)
+ if !has_key(msg_top,'id')
+ throw "No top visible message."
+ endif
+
+ " if the top message is the last message, just expunge the entire thread and move on
+ if msg_top['end'] == line('$')
+ let ids = []
+ for msg in b:nm_raw_info['msgs']
+ if has_key(msg,'match') && msg['match'] != '0'
+ call add(ids, msg['id'])
+ endif
+ endfor
+ let filter = <SID>NM_combine_tags('tag:', advance_tags, 'OR', '()')
+ \ + ['AND']
+ \ + <SID>NM_combine_tags('', ids, 'OR', '()')
+ call <SID>NM_add_remove_tags(filter, '-', advance_tags)
+ call <SID>NM_show_next(1, 1)
+ return
+ endif
+
+ let msg_bot = <SID>NM_show_get_message_for_line(vis_bot)
+ if !has_key(msg_bot,'id')
+ throw "No bottom visible message."
+ endif
+
+ " if entire message fits on the screen, read/archive it, move to the next one
+ if msg_top['id'] != msg_bot['id'] || msg_top['end'] <= vis_bot
+ call <SID>NM_add_remove_tags_on_screen(msg_top['start'], '-', advance_tags)
+ exec printf('norm %dG', vis_top)
+ call <SID>NM_show_next(0, 1)
+ if has_key(msg_top,'match') && msg_top['match'] != '0'
+ redraw
+ " do this last to hide the latency
+ let filter = <SID>NM_combine_tags('tag:', advance_tags, 'OR', '()')
+ \ + ['AND', msg_top['id']]
+ call <SID>NM_add_remove_tags(filter, '-', advance_tags)
+ endif
+ return
+ endif
+
+ " entire message does not fit on the screen, scroll down to bottom, max 1/2 screen
+ let jmp = winheight(winnr()) / 2
+ let max = msg_bot['end'] - vis_bot
+ if jmp > max
+ let jmp = max
+ endif
+ exec printf('norm %dGzt', vis_top + jmp)
+ return
+endfunction
+
+function! s:NM_show_pipe_message()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_previous_fold()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_next_fold()
+ echo 'not implemented'
+endfunction
+
+function! s:NM_show_toggle_fold()
+ echo 'not implemented'
+endfunction
+
+
+" --- --- show screen helper functions {{{2
+
+function! s:NM_show_get_message_for_line(line)
+ for msg in b:nm_raw_info['msgs']
+ if a:line > msg['end']
+ continue
+ endif
+ return msg
+ endfor
+ return {}
+endfunction
+
+function! s:NM_show_message_id()
+ if !exists('b:nm_raw_info')
+ throw 'Eeek! no b:nm_raw_info'
+ endif
+ let msg = <SID>NM_show_get_message_for_line(line('.'))
+ if has_key(msg,'id')
+ return msg['id']
+ endif
+ return ''
+endfunction
+
+function! s:NM_show_fold_toggle(key, type, fold)
+ let info = b:nm_raw_info
+ let act = 'open'
+ if a:fold
+ let act = 'close'
+ endif
+ for fld in info['folds']
+ if fld[0] != a:type
+ continue
+ endif
+ "let idx = fld[3]
+ "let msg = info['msgs'][idx]
+ "if has_key(msg,'match') && msg['match'] == '0'
+ " continue
+ "endif
+ let cls = foldclosed(fld[1])
+ if cls != -1 && cls != fld[1]
+ continue
+ endif
+ exec printf('%dfold%s', fld[1], act)
+ endfor
+ exec printf('nnoremap <buffer> %s :call <SID>NM_show_fold_toggle(''%s'', ''%s'', %d)<CR>', a:key, a:key, a:type, !a:fold)
+endfunction
+
+
+" s:NM_cmd_show_parse returns the following dictionary:
+" 'disp': lines to display
+" 'msgs': message info dicts { start, end, id, depth, filename, descr, header }
+" 'folds': fold info arrays [ type, start, end ]
+" 'foldtext': fold text indexed by start line
+function! s:NM_cmd_show_parse(inlines)
+ let info = { 'disp': [],
+ \ 'msgs': [],
+ \ 'folds': [],
+ \ 'foldtext': {} }
+ let msg = {}
+ let hdr = {}
+
+ let in_message = 0
+ let in_header = 0
+ let in_body = 0
+ let in_part = ''
+
+ let body_start = -1
+ let part_start = -1
+
+ let mode_type = ''
+ let mode_start = -1
+
+ let inlnum = 0
+ for line in a:inlines
+ let inlnum = inlnum + 1
+ let foldinfo = []
+
+ if strlen(in_part)
+ let part_end = 0
+
+ if match(line, g:notmuch_show_part_end_regexp) != -1
+ let part_end = len(info['disp'])
+ else
+ call add(info['disp'], line)
+ endif
+
+ if in_part == 'text/plain'
+ if !part_end && mode_type == ''
+ if match(line, g:notmuch_show_signature_regexp) != -1
+ let mode_type = 'sig'
+ let mode_start = len(info['disp'])
+ elseif match(line, g:notmuch_show_citation_regexp) != -1
+ let mode_type = 'cit'
+ let mode_start = len(info['disp'])
+ endif
+ elseif mode_type == 'cit'
+ if part_end || match(line, g:notmuch_show_citation_regexp) == -1
+ let outlnum = len(info['disp'])
+ let foldinfo = [ mode_type, mode_start, outlnum-1, len(info['msgs']),
+ \ printf('[ %d-line citation. Press "c" to show. ]', outlnum - mode_start) ]
+ let mode_type = ''
+ endif
+ elseif mode_type == 'sig'
+ let outlnum = len(info['disp'])
+ if (outlnum - mode_start) > g:notmuch_show_signature_lines_max
+ let mode_type = ''
+ elseif part_end
+ let foldinfo = [ mode_type, mode_start, outlnum-1, len(info['msgs']),
+ \ printf('[ %d-line signature. Press "s" to show. ]', outlnum - mode_start) ]
+ let mode_type = ''
+ endif
+ endif
+ endif
+
+ if part_end
+ " FIXME: this is a hack for handling two folds being added for one line
+ " we should handle addinga fold in a function
+ if len(foldinfo) && foldinfo[1] < foldinfo[2]
+ call add(info['folds'], foldinfo[0:3])
+ let info['foldtext'][foldinfo[1]] = foldinfo[4]
+ endif
+
+ let foldinfo = [ 'text', part_start, part_end, len(info['msgs']),
+ \ printf('[ %d-line %s. Press "p" to show. ]', part_end - part_start, in_part) ]
+ let in_part = ''
+ call add(info['disp'], '')
+ endif
+
+ elseif in_body
+ if !has_key(msg,'body_start')
+ let msg['body_start'] = len(info['disp']) + 1
+ endif
+ if match(line, g:notmuch_show_body_end_regexp) != -1
+ let body_end = len(info['disp'])
+ let foldinfo = [ 'bdy', body_start, body_end, len(info['msgs']),
+ \ printf('[ BODY %d - %d lines ]', len(info['msgs']), body_end - body_start) ]
+
+ let in_body = 0
+
+ elseif match(line, g:notmuch_show_part_begin_regexp) != -1
+ let m = matchlist(line, 'ID: \(\d\+\), Content-type: \(\S\+\)')
+ let in_part = 'unknown'
+ if len(m)
+ let in_part = m[2]
+ endif
+ call add(info['disp'],
+ \ printf('--- %s ---', in_part))
+ let part_start = len(info['disp']) + 1
+ endif
+
+ elseif in_header
+ if in_header == 1
+ let msg['descr'] = line
+ call add(info['disp'], line)
+ let in_header = 2
+ let msg['hdr_start'] = len(info['disp']) + 1
+
+ else
+ if match(line, g:notmuch_show_header_end_regexp) != -1
+ let hdr_start = msg['hdr_start']+1
+ let hdr_end = len(info['disp'])
+ let foldinfo = [ 'hdr', hdr_start, hdr_end, len(info['msgs']),
+ \ printf('[ %d-line headers. Press "h" to show. ]', hdr_end + 1 - hdr_start) ]
+ let msg['header'] = hdr
+ let in_header = 0
+ let hdr = {}
+ else
+ let m = matchlist(line, '^\(\w\+\):\s*\(.*\)$')
+ if len(m)
+ let hdr[m[1]] = m[2]
+ if match(g:notmuch_show_headers, m[1]) != -1
+ call add(info['disp'], line)
+ endif
+ endif
+ endif
+ endif
+
+ elseif in_message
+ if match(line, g:notmuch_show_message_end_regexp) != -1
+ let msg['end'] = len(info['disp'])
+ call add(info['disp'], '')
+
+ let foldinfo = [ 'msg', msg['start'], msg['end'], len(info['msgs']),
+ \ printf('[ MSG %d - %s ]', len(info['msgs']), msg['descr']) ]
+
+ call add(info['msgs'], msg)
+ let msg = {}
+ let in_message = 0
+ let in_header = 0
+ let in_body = 0
+ let in_part = ''
+
+ elseif match(line, g:notmuch_show_header_begin_regexp) != -1
+ let in_header = 1
+ continue
+
+ elseif match(line, g:notmuch_show_body_begin_regexp) != -1
+ let body_start = len(info['disp']) + 1
+ let in_body = 1
+ continue