support incsearch

Author: ZSaberLv0

plugin/incsearch.vim

@@ -0,0 +1,90 @@
+
+if !exists('##CmdlineChanged')
+            \ || !exists('##CmdlineLeave')
+    finish
+endif
+
+augroup eregex_incsearch_augroup
+    autocmd!
+    autocmd CmdlineChanged * call s:onUpdate()
+    autocmd CmdlineLeave * call s:onLeave()
+augroup END
+
+if !has('nvim')
+    function! K_eregex_incsearch_abort_cr()
+        let s:eregex_incsearch_abort = 0
+        return "\<cr>"
+    endfunction
+    cnoremap <expr> <cr> K_eregex_incsearch_abort_cr()
+endif
+
+function! s:onUpdate()
+    if getcmdtype() != ':'
+                \ || !get(g:, 'eregex_incsearch', get(b:, 'eregex_incsearch', &incsearch))
+        return
+    endif
+    let cmd = s:cmdParse(getcmdline())
+    if empty(cmd)
+        return
+    endif
+    let hlsearchSaved = &hlsearch
+    set nohlsearch
+    if !exists('s:patternSaved')
+        let s:patternSaved = @/
+        if !has('nvim')
+            let s:eregex_incsearch_abort = 1
+        endif
+    endif
+    let @/ = E2v(cmd['pattern'])
+    if hlsearchSaved
+        set hlsearch
+    endif
+    redraw
+endfunction
+
+function! s:onLeave()
+    if !exists('s:patternSaved')
+        return
+    endif
+    let patternSaved = s:patternSaved
+    unlet s:patternSaved
+    if has('nvim')
+        let abort = get(v:event, 'abort', 0)
+    else
+        let abort = get(s:, 'eregex_incsearch_abort', 0)
+    endif
+    if abort
+        let @/ = patternSaved
+        redraw!
+    endif
+endfunction
+
+" input: M/abc
+" output: {
+"   'method' : 'M'
+"   'pattern' : 'abc'
+" }
+"
+" input: 1,3S/abc/xyz/g
+" output: {
+"   'method' : 'S',
+"   'pattern' : 'abc',
+" }
+function! s:cmdParse(cmdline)
+    let token = nr2char(127)
+    let items = split(substitute(a:cmdline, '\\/', token, 'g'), '/')
+    if len(items) <= 1
+        return {}
+    endif
+    let modes = get(g:, 'eregex_incsearch_modes', get(b:, 'eregex_incsearch_modes', 'MSGV'))
+    " ^[0-9,\.\$%]*([MSGV])\/.*$
+    let method = substitute(items[0], '^[0-9,\.\$%]*\([' . modes . ']\)\/.*$', '\1', '')
+    if empty(method)
+        return {}
+    endif
+    return {
+                \   'method' : method,
+                \   'pattern' : substitute(items[1], token, '\\/', 'g'),
+                \ }
+endfunction
+