Update Tmux configuration and integrate Vim

nvim/nvim.symlink/init.vim

@@ -6,6 +6,9 @@ set updatetime=100
 
 call plug#begin()
 
+" Pane Navigation (Tmux integration)
+Plug 'christoomey/vim-tmux-navigator'
+
 " Colours
 Plug 'morhetz/gruvbox'
 
@@ -116,12 +119,6 @@ set autowrite
 set splitbelow
 set splitright
 
-" Just remove an extra keystroke
-nnoremap <C-j> <C-w>j
-nnoremap <C-k> <C-w>k
-nnoremap <C-h> <C-w>h
-nnoremap <C-l> <C-w>l
-
 " Make searches case sensitive only if an upper case character has been typed
 set ignorecase smartcase
 
@@ -190,6 +187,29 @@ set shiftwidth=4
 set softtabstop=4
 set autoindent
 
+" Zoom the current split
+function! ZoomOrUnzoom()
+    if exists('g:is_zoomed')
+        unlet g:is_zoomed
+        execute "wincmd ="
+    else
+        let g:is_zoomed = 'true'
+        execute "wincmd _"
+        execute "wincmd \|"
+    endif
+endfunc
+
+function! HandleResize()
+    if exists('g:is_zoomed')
+        execute "wincmd _"
+        execute "wincmd \|"
+    else
+        execute "wincmd ="
+    endif
+endfunc
+
+nnoremap <C-z> :call ZoomOrUnzoom()<cr>
+
 function! RunTypeScript()
     silent !clear
     execute "!tsc % --outFile /dev/stdout | node"
@@ -234,6 +254,9 @@ augroup vimrcEx
   " Automatically enter terminal mode when summoning a terminal
   autocmd TermOpen term://* startinsert
 
+  " Lay out splits when Vim gets resized
+  autocmd VimResized * :call HandleResize()<cr>
+
 augroup END
 
 " Make directories in a filename if they don't exist.

tmux/tmux.conf.symlink

@@ -1,16 +1,56 @@
-# pane switching
-bind C-h select-pane -L
-bind C-j select-pane -D
-bind C-k select-pane -U
-bind C-l select-pane -R
-bind C-\ select-pane -l
+# Reload Tmux configuration
+bind-key r source-file ~/.tmux.conf \; display-message "~/.tmux.conf reloaded"
 
-# easily toggle synchronization (mnemonic: e is for echo)
-bind e setw synchronize-panes on
-bind E setw synchronize-panes off
+# Enable Tmux's mouse mode.
+#
+# In iTerm, this mostly does what I want, in that it allows me to click on
+# things to bring them into focus (windows, panes). It also handles scrolling
+# more elegantly.
+set-option -g mouse on
 
-# start a pane in the right fucking folder
-bind c new-window -c "#{pane_current_path}"
-bind % split-window -h -c '#{pane_current_path}'
-bind '"' split-window -v -c '#{pane_current_path}'
+# Mouse mode isn't perfect. By default, ending a drag cancels the selection,
+# which is a jarring on non-default behaviour. This makes sure this doesn't
+# happen anymore.
+unbind-key -T copy-mode MouseDragEnd1Pane
 
+# Because we cancelled the mouse drag ending a selection, we don't have an
+# easy and convenient way to make get back to normal. When using a GUI, a
+# single click usually does the trick. This command restores that behaviour.
+bind-key -T copy-mode MouseUp1Pane send-keys -X cancel
+
+# Use the Vim yank mnemonic to commit a copy when in copy mode.
+# I don't actually hit "y" to copy, though. In iTerm, I have Cmd+C set up
+# to send the hexcode for y to the terminal, which means the normal macOS
+# copy shortcut does the right thing, so long as I'm in Tmux.
+bind-key -T copy-mode y send-keys -X copy-pipe "pbcopy"
+
+# When I delete a window, relabel them automatically.
+set-option -g renumber-windows on
+
+# Pane switching. These interface with Vim to ensure that pane switching is
+# both consistent and sensible.
+#
+# Borrowed from Chris Toomey: https://github.com/christoomey/vim-tmux-navigator
+is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
+    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
+bind-key -n C-h if-shell "$is_vim" "send-keys C-h"  "select-pane -L"
+bind-key -n C-j if-shell "$is_vim" "send-keys C-j"  "select-pane -D"
+bind-key -n C-k if-shell "$is_vim" "send-keys C-k"  "select-pane -U"
+bind-key -n C-l if-shell "$is_vim" "send-keys C-l"  "select-pane -R"
+bind-key -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
+
+# When zooming a pane in a window, also zoom the vim split
+bind-key z if-shell "$is_vim" "resize-pane -Z \; send-keys C-z" "resize-pane -Z"
+
+# All pane and window creations use the same path as the current process,
+# which I have found to be a good default.
+#
+# I don't typically hit <prefix>c to open a new window, I have that bound
+# to Cmd+T in iTerm the same way I manage the clipboard. I also add the
+# tab traversal shortcuts to move between Tmux windows.
+bind-key c new-window -c "#{pane_current_path}"
+
+# Backslash is the unshifted version of |
+bind-key \ split-window -h -c '#{pane_current_path}'
+# Ditto, hyphen is the unshifted version of _
+bind-key - split-window -v -c '#{pane_current_path}'