+function! s:NM_newComposeBuffer(lines, start_on_line)
+ let lines = a:lines
+ let start_on_line = a:start_on_line
+ let real_hdr_start = 1
+ if g:notmuch_compose_header_help
+ let help_lines = [
+ \ 'Notmuch-Help: Type in your message here; to help you use these bindings:',
+ \ 'Notmuch-Help: ,a - attach a file',
+ \ 'Notmuch-Help: ,s - send the message (Notmuch-Help lines will be removed)',
+ \ 'Notmuch-Help: ,q - abort the message',
+ \ 'Notmuch-Help: <Tab> - skip through header lines',
+ \ ]
+ call extend(lines, help_lines, 0)
+ let real_hdr_start = len(help_lines)
+ if start_on_line > 0
+ let start_on_line = start_on_line + len(help_lines)
+ endif
+ endif
+ call extend(lines, g:notmuch_signature)
+
+
+ let prev_bufnr = bufnr('%')
+ setlocal bufhidden=hide
+ call <SID>NM_newFileBuffer(g:notmuch_compose_temp_file_dir, '%s.mail',
+ \ 'compose', lines)
+ setlocal bufhidden=hide
+ let b:nm_prev_bufnr = prev_bufnr
+
+ call <SID>NM_set_map('n', g:notmuch_compose_nmaps)
+ call <SID>NM_set_map('i', g:notmuch_compose_imaps)
+
+ if start_on_line > 0 && start_on_line <= len(lines)
+ call cursor(start_on_line, strlen(getline(start_on_line)) + 1)
+ else
+ call cursor(real_hdr_start, strlen(getline(real_hdr_start)) + 1)
+ call <SID>NM_compose_next_entry_area()
+ endif
+
+ if g:notmuch_compose_insert_mode_start
+ startinsert!
+ endif
+ echo 'Type your message, use <TAB> to jump to next header and then body.'
+endfunction
+
+function! s:NM_assert_buffer_type(type)
+ if !exists('b:nm_type') || b:nm_type != a:type
+ throw printf('Eeek! expected type %s, but got %s.', a:type,
+ \ exists(b:nm_type) ? b:nm_type : 'something else')
+ endif
+endfunction
+