【小众插件分享】 bln-mode: binary navigation

suliveevil · 2022 年11 月 24 日 09:16

功能

超脱于文本对象，基于光标位置的二分法光标移动（行或列）。

小众程度

first commit on GitHub: 2016-12-02

GitHub star: 9

Melpa 下载统计: 693

统计数据来自 epkg+epkgs，截至时间 2022-11-24 22:09:14 +0800

Vim 同类功能（2022-10-05）：

github.com/vim/vim

Binary cursor position

opened 12:27PM - 05 Oct 22 UTC

wonderful27x

enhancement

**The most powerful cursor moving action - Binary cursor position** Hello g…uys, this is not only for the author of vim, but also for all of you vim friends. I am sorry to share my idea in this way. I have been using vim for many years, but not in the right way until I learned 《vim 实用技巧第二版》and 《[learn vimscript the hard way](https://learnvimscriptthehardway.stevelosh.com/)》in this recent several moths, I am so crazy about vim - the god of editor. **The Biggest problem for me is cursor moving** I do believe that for many vim users who do not edit in English sometimes, how to move the cursor to the target in horizontal direction is very very difficult for the reason that we are not able to use "f" to find where we want to go. See the following sentence in Chinese (the same as other language which is not English): > **大**家好，我是vim的狂热粉丝，很高兴在这里与大家相会！ When my cursor at “大”, now I want to move to "高“, how can I get there quickly? I cannot use “f", Of course I can type "l" to go step one by one, but what if the sentence is very very long? **Here is my idea** So I come up with an original way of cursor moving which depend on no languages - **The binary cursor moving** We binary move the cursor every time when type key maps, it will get the target very quickly without even thinking. And here is the code: ``` " ==========binary position========== {{{ " This is the most powerful cursor moving action " As its name shows the cursor moving acts in binary mode " <C-j> <C-k> binary move the cursor in vertical direction " <C-h> <C-k> binary move the cursor in horizontal direction let g:v_beg = 0 let g:v_mid = 0 let g:v_end = 0 let g:v_last_p = 0 let g:h_beg = 0 let g:h_mid = 0 let g:h_end = 0 let g:h_last_p = 0 nnoremap <C-j> :<c-u>call <SID>BinaryPositionV("down")<CR> nnoremap <C-k> :<c-u>call <SID>BinaryPositionV("up")<CR> nnoremap <C-h> :<c-u>call <SID>BinaryPositionH("left")<CR> nnoremap <C-l> :<c-u>call <SID>BinaryPositionH("right")<CR> noremap <leader>c :<c-u>call <SID>BinaryClear()<CR> function! s:ResetV() let g:v_beg = line('w0') let g:v_end = line('w$') let g:v_mid = g:v_beg + (g:v_end - g:v_beg) / 2 let g:v_last_p = 0 endfunction function! s:ResetH() let g:h_beg = 1 let g:h_end = col('$') let g:h_mid = g:h_beg + (g:h_end - g:h_beg) / 2 let g:h_last_p = 0 endfunction function! s:BinaryClear() call <SID>ResetV() call <SID>ResetH() echom "Binary position has benn cleared!" endfunction function! s:BinaryPositionV(direction) let v_p = line('w0') if v_p != g:v_last_p call <SID>ResetV() call cursor(g:v_mid, 0) let g:v_last_p = v_p echom "call BinaryPositionV(\"" . a:direction . "\")" . " -> beg: " . g:v_beg . " end: " . g:v_end . " mid: " . g:v_mid return endif if a:direction ==? 'down' let g:v_beg = g:v_mid elseif a:direction ==? 'up' let g:v_end = g:v_mid endif let g:v_mid = g:v_beg + (g:v_end - g:v_beg) / 2 call cursor(g:v_mid, 0) echom "call BinaryPositionV(\"" . a:direction . "\")" . " -> beg: " . g:v_beg . " end: " . g:v_end . " mid: " . g:v_mid endfunction function! s:BinaryPositionH(direction) let h_p = line('.') if h_p != g:h_last_p call <SID>ResetH() call cursor(0, g:h_mid) let g:h_last_p = h_p echom "call BinaryPositionH(\"" . a:direction . "\")" . " -> beg: " . g:h_beg . " end: " . g:h_end . " mid: " . g:h_mid return endif if a:direction ==? 'left' let g:h_end = g:h_mid elseif a:direction ==? 'right' let g:h_beg = g:h_mid endif let g:h_mid = g:h_beg + (g:h_end - g:h_beg) / 2 call cursor(0, g:h_mid) echom "call BinaryPositionH(\"" . a:direction . "\")" . " -> beg: " . g:h_beg . " end: " . g:h_end . " mid: " . g:h_mid endfunction " }}} ``` **How does it works(for the horizontal direction)** * We set three global variables: beg, end, and mid first. * when type \<C-h> or \<C-l> call a function * if the cursor line has changed, then reset beg=begin of sentence, end=end of sentence, mid=mid of sentence. The cursor will be put in the middle at the first time * if the target in the left of cursor we have typed \<C-h> then calculate in binary idea to put the cursor in the middle of the left side * next if the target in the right of the cursor now we type \<C-l>, it will binary move to middle of the right side. * when we type several \<C-h> \<C-l> we will closer to the target, then we can use "h" or "l" to move as usual. > note: the same as virtical direction **Why not create a plugin** As you can see, I think this is a very wonderful idea of cursor moving, also powerful of vim, I do believe many people need it and will be love of it. So I strongly recommended to apply this "Binary cursor position" in vim source code. I have never read vim source code and also have no time to do it. I hope all vim friends here can implement this idea someday. Also you can copy the code above to your vimrc directory if you like it, and note that it will cover the origin key map of \<C-j> \<C-k> \<C-h> \<C-l>.

碎碎念

不知道有没有基于二分法的折叠插件，也或许可以直接把折叠功能绑定到这个插件上。

还有个更古早的同类插件，不过很久没更新了。

http://www.skamphausen.de/cgi-bin/ska/swiss-move

twlz0ne · 2022 年11 月 24 日 09:34

你分享的这个 mode 的链接在哪里？

suliveevil · 2022 年11 月 24 日 09:36

忘了加了，报歉，马上修改。

链接已补上

xiaorong61 · 2022 年11 月 27 日 13:40

用起来了，挺爽的，虽然没有 avy 功能强大，但有一种简洁美。