From b361fc40532a9808c99f497336239b6fe4b41d5f Mon Sep 17 00:00:00 2001
From: jdhao <jdhao@hotmail.com>
Date: Thu, 12 Nov 2020 00:22:51 +0800
Subject: [PATCH] feat: add iu text object for URL (no au provided)

Usage:
select current URL: viu
yank current URL: yiu
delete/change current URL: diu/ciu
---
 core/mappings.vim | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/core/mappings.vim b/core/mappings.vim
index 26bb3f3..92c3f7d 100644
--- a/core/mappings.vim
+++ b/core/mappings.vim
@@ -210,4 +210,35 @@ nnoremap <Left> <C-W>h
 nnoremap <Right> <C-W>l
 nnoremap <Up> <C-W>k
 nnoremap <Down> <C-W>j
+
+vnoremap <silent> iu :<C-U>call <SID>URLTextObj()<CR>
+onoremap <silent> iu :<C-U>call <SID>URLTextObj()<CR>
+
+function! s:URLTextObj() abort
+  " Note that we use https://github.com/itchyny/vim-highlighturl to get the URL pattern.
+  let url_pattern = highlighturl#default_pattern()
+  " Note that the index starts at 0, end_idx is index of the character left of
+  " the pattern.
+  let [url, start_idx, end_idx] = matchstrpos(getline('.'), url_pattern)
+  if start_idx == -1
+    return
+  endif
+
+  let cursor_col = getcurpos()[2]
+  let cur_row = line('.')
+  " Adjust the idx to actual column number.
+  let start_col = start_idx + 1
+  let end_col = end_idx
+
+  " Only active it when cursor is on the URL, otherwise, do nothing.
+  if cursor_col < start_col || cursor_col > end_idx
+    return
+  endif
+
+  let bufnum = bufnr()
+  " now set the '< and '> mark
+  call setpos("'<", [bufnum, cur_row, start_col, 0])
+  call setpos("'>", [bufnum, cur_row, end_col, 0])
+  normal! gv
+endfunction
 "}