fix justinmk#27: multibyte highlighting!

fix a (literal) edge case: matches near edge of screen were not
considered on-screen.

README.md

@@ -1,9 +1,9 @@
 # sneak.vim :shoe:
 
-Sneak is a minimalist, versatile Vim *motion* plugin that flies you to any location specified by two characters.
+Sneak is a minimalist, versatile Vim *motion* plugin that jumps to any location specified by two characters.
 It works with **multiple lines**, **operators** (including **repeat** `.`
-and **[surround]**), **[keymaps]**, **visual mode**,
-and **macros**. Many small details have been carefully considered to minimize
+and **[surround]**), **[keymaps]**, **visual mode**, **[unicode]** ("multibyte"),
+and **macros**. Many details have been carefully balanced to minimize
 friction between *intent* and *action*.
 
 The plugin chooses sane defaults, easily changed via `<Plug>` mappings
@@ -14,6 +14,7 @@ to [EasyMotion](https://github.com/Lokaltog/vim-easymotion):
 
     let g:sneak#streak = 1
 
+[unicode]: http://vimdoc.sourceforge.net/htmldoc/mbyte.html#UTF-8
 [keymaps]: http://vimdoc.sourceforge.net/htmldoc/mbyte.html#mbyte-keymap
 [surround]: https://github.com/tpope/vim-surround
 [count]: http://vimdoc.sourceforge.net/htmldoc/intro.html#[count]

autoload/sneak/search.vim

@@ -37,7 +37,7 @@ func! sneak#search#new()
     let wincol_lhs = a:w.leftcol "this is actually just to the _left_ of the first onscreen column.
     let wincol_rhs  = 2 + (winwidth(0) - sneak#util#wincol1()) + wincol_lhs
     "restrict search to window
-    return '\%>'.(wincol_lhs).'c'.'\%<'.wincol_rhs.'c'
+    return '\%>'.(wincol_lhs).'v'.'\%<'.(wincol_rhs+1).'v'
   endf
 
   func! s.get_stopline()

autoload/sneak/streak.vim

@@ -33,8 +33,7 @@ let g:sneak#target_labels = get(g:, 'sneak#target_labels', "asdfghjkl;qwertyuiop
 
 func! s:placematch(c, pos)
   let s:matchmap[a:c] = a:pos
-  "TODO: figure out why we must +1 the column...
-  exec "syntax match SneakStreakTarget '.\\%".a:pos[0]."l\\%".(a:pos[1]+1)."c' conceal cchar=".a:c
+  exec "syntax match SneakStreakTarget '\\%".a:pos[0]."l\\%".a:pos[1]."c.' conceal cchar=".a:c
 endf
 
 func! s:decorate_statusline() "highlight statusline to indicate streak-mode.