nvim: keymappings/plugins: Add support for marks and registers

We drop vim-system-copy and will explicitly use registers when required.
Add nvim-peekup to help with registers and vim-signature for marks. Some
additional helper bindings for working with marks are added as well.

nvim/.config/nvim/init.lua

@@ -89,6 +89,9 @@ vim.g.vimtex_view_general_options = '--unique \\@pdf\\#src:@tex:@line:@col'
 vim.g.toggle_list_no_mappings = 1
 -- Enable rainbow brackets everywhere
 vim.g.rainbow_active = 1
+-- Needs to be set before nvim-peekup
+vim.g.peekup_paste_before = '<Leader>P'
+vim.g.peekup_paste_after = '<Leader>p'
 
 -- Settings using nvim.api
 -- Needs to be set before vim-sneak is loaded

nvim/.config/nvim/lua/keymappings.lua

@@ -121,5 +121,20 @@ remap('v', '<', '<gv', { noremap = true })
 remap('v', '>', '>gv', { noremap = true })
 
 -- Copy whole buffer
-remap('',  '<C-c><C-c>', ':norm gg0VG$cp<CR>',   { noremap = false })
-remap('i', '<C-c><C-c>', ':norm jkgg0VG$cp<CR>', { noremap = false })
+remap('',  '<C-c><C-c>', ':norm gg0VG$"*y<CR>',   { noremap = false })
+remap('i', '<C-c><C-c>', ':norm jkgg0VG$"*y<CR>', { noremap = false })
+
+-- Marks
+-- '0      - Position of cursor when last exited Vim.
+-- '"      - Position of cursor when last exited the current buffer.
+-- '.      - Position of last change.
+-- '< & '> - Start/end of visual selection.
+-- '[ & '] - Start/end of last change or yank.
+-- '^      - Position of cursor when last Vim last left insert mode - This is how gi command works.
+-- ''      - Position before last jump (Super useful!). See :h ''.
+-- Map gm to `. Instead of `a, hit gma. See :help mark-motions as to why we use backtick.
+remap('n', 'gm', '`', { noremap = false })
+-- Jump using marks to last change, left insert, jump.
+remap('n', '<Leader>mc', ':norm `.<CR>',  { noremap = true })
+remap('n', '<Leader>mi', ':norm `^<CR>',  { noremap = true })
+remap('n', '<Leader>mj', ':norm `\'<CR>', { noremap = true })

nvim/.config/nvim/lua/plugins.lua

@@ -95,8 +95,6 @@ local init = function ()
     'liuchengxu/vim-which-key',
     config = "require('modules.which_key')"
   }
-  -- Clipboard
-  use 'christoomey/vim-system-copy'
   -- Toggle terminal
   use {
     'voldikss/vim-floaterm',
@@ -158,6 +156,11 @@ local init = function ()
     config = "require('modules.statusline')",
     requires = { 'kyazdani42/nvim-web-devicons' }
   }
+  -- Marks and registers
+  use {
+    'kshenoy/vim-signature',
+    'gennaro-tedesco/nvim-peekup'
+  }
 end
 
 return require('packer').startup(init)