Add more hook points

And make the hook calling simpler at the call site.

docs/hooks.md

@@ -1,14 +1,39 @@
 # Save & Restore Hooks
 
-Hooks allow to set custom commands that will be executed during session save and restore.
+Hooks allow to set custom commands that will be executed during session save
+and restore. Most hooks are called with zero arguments, unless explicitly
+stated otherwise.
 
 Currently the following hooks are supported:
 
-- `@resurrect-save-hook` - executed after session save
-- `@resurrect-restore-hook` - executed before session restore
+- `@resurrect-hook-post-save-layout`
+
+  Called after all sessions, panes and windows have been saved.
+
+  Passed single argument of the state file.
+
+- `@resurrect-hook-post-save-all`
+
+  Called at end of save process right before the spinner is turned off.
+
+- `@resurrect-hook-pre-restore-all`
+
+  Called before any tmux state is altered.
+
+- `@resurrect-hook-pre-restore-history`
+
+  Called after panes and layout have been restores, but before bash history is
+  restored (if it is enabled) -- the hook is always called even if history
+  saving is disabled.
+
+- `@resurrect-hook-pre-restore-pane-processes`
+
+  Called after history is restored, but before running processes are restored.
+
+### Examples
 
 Here is an example how to save and restore window geometry for most terminals in X11.
 Add this to `.tmux.conf`:
 
-    set -g @resurrect-save-hook 'eval $(xdotool getwindowgeometry --shell $WINDOWID); echo 0,$X,$Y,$WIDTH,$HEIGHT > $HOME/.tmux/resurrect/geometry'
-    set -g @resurrect-restore-hook 'wmctrl -i -r $WINDOWID -e $(cat $HOME/.tmux/resurrect/geometry)'
+    set -g @resurrect-hook-post-save-all 'eval $(xdotool getwindowgeometry --shell $WINDOWID); echo 0,$X,$Y,$WIDTH,$HEIGHT > $HOME/.tmux/resurrect/geometry'
+    set -g @resurrect-hook-pre-restore-all 'wmctrl -i -r $WINDOWID -e $(cat $HOME/.tmux/resurrect/geometry)'