refactor: simplify dotfiles configuration

.tmux.conf

@@ -1,67 +1,43 @@
 set-option -sg escape-time 10
-set -g default-terminal "screen-256color"
-# set -g default-terminal "xterm-256color"
-set-option -g history-limit 1000000
-
-set -g focus-events on # requirement for vim's vim-tmux-clipboard plugin
-
-# turn off status line
+set -g default-terminal 'tmux-256color'
+set -as terminal-features ',xterm-256color:RGB'
+set -g history-limit 100000
+set -g mouse on
+set -g focus-events on
 set -g status off
-
-set-option -sa terminal-overrides ',xterm-256color:RGB'
 setw -g mode-keys vi
-bind-key -T copy-mode-vi 'v' send -X begin-selection
-bind-key -T copy-mode-vi 'y' send-keys -X copy-pipe-and-cancel 'xclip -in -selection clipboard'
 
-# vim-like pane resizing
-bind-key -r C-k resize-pane -U
-bind-key -r C-j resize-pane -D
+bind-key -T copy-mode-vi v send -X begin-selection
+bind-key -T copy-mode-vi y send -X copy-pipe-and-cancel \
+  'if command -v wl-copy >/dev/null 2>&1; then wl-copy; elif command -v xclip >/dev/null 2>&1; then xclip -in -selection clipboard; elif command -v pbcopy >/dev/null 2>&1; then pbcopy; elif command -v clip.exe >/dev/null 2>&1; then clip.exe; else cat >/dev/null; fi'
+
+# Prefix + Ctrl-H/J/K/L resizes panes.
 bind-key -r C-h resize-pane -L
+bind-key -r C-j resize-pane -D
+bind-key -r C-k resize-pane -U
 bind-key -r C-l resize-pane -R
 
-# vim-like pane switching
-# bind-key -n C-k select-pane -U
-# bind-key -n C-j select-pane -D
-# bind-key -n C-h select-pane -L
-# bind-key -n C-l select-pane -R
-
-# and now unbind keys
-unbind Up
-unbind Down
-unbind Left
-unbind Right
-
-unbind C-Up
-unbind C-Down
-unbind C-Left
-unbind C-Right
-
-# Smart pane switching with awareness of Vim splits.
-# See: https://github.com/christoomey/vim-tmux-navigator
+# Ctrl-H/J/K/L moves seamlessly between tmux panes and Vim splits.
 is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
-    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|l?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 "$is_vim" 'send-keys C-l'  'select-pane -R'
-tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
-if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
-    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
-if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
-    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"
+  | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?\\.?(view|l?n?vim?x?)(diff)?(-wrapped)?$'"
+bind-key -n C-h if-shell "$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'
 
-bind-key -T copy-mode-vi 'C-h' select-pane -L
-bind-key -T copy-mode-vi 'C-j' select-pane -D
-bind-key -T copy-mode-vi 'C-k' select-pane -U
-bind-key -T copy-mode-vi 'C-l' select-pane -R
+bind-key -T copy-mode-vi C-h select-pane -L
+bind-key -T copy-mode-vi C-j select-pane -D
+bind-key -T copy-mode-vi C-k select-pane -U
+bind-key -T copy-mode-vi C-l select-pane -R
 bind-key -T copy-mode-vi 'C-\' select-pane -l
 
 set -g @plugin 'tmux-plugins/tpm'
 set -g @plugin 'tmux-plugins/tmux-sensible'
-
 set -g @plugin 'roosta/tmux-fuzzback'
 set -g @fuzzback-popup-size '90%'
 set -g @fuzzback-popup 1
 set -g @fuzzback-fzf-colors 'gutter:-1,bg+:-1'
 
-run '~/.tmux/plugins/tpm/tpm'
+if-shell 'test -x "$HOME/.tmux/plugins/tpm/tpm"' \
+  'run-shell "$HOME/.tmux/plugins/tpm/tpm"'