102-hydra: update functions as referenced in upstream documentation

* update reference hyperlink
* introduce new defun

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

site-start.d/102-hydra.el

@@ -1,17 +1,105 @@
 ;;; 102-hydra.el --- tie related commands into a family of short bindings
 
+;; Copyright (C) 2015  Free Software Foundation, Inc.
+
+;; Author: Oleh Krehel
+
 ;;; Commentary:
+
 ;; Hydra enables you to tie related commands into a family of short bindings
 ;; with a common prefix - a Hydra.
 ;; reference: https://github.com/abo-abo/hydra
+;; examples: https://github.com/abo-abo/hydra/blob/05871dd6c8af7b2268bd1a10eb9f8a3e423209cd/hydra-examples.el#L337
 
 ;;; Code:
+
 (use-package hydra
   :config
-  (setq hydra-lv nil))
+  ;;(setq hydra-lv nil)
+
+  (defun hydra-move-splitter-left (arg)
+    "Move window splitter left."
+    (interactive "p")
+    (if (let ((windmove-wrap-around))
+	  (windmove-find-other-window 'right))
+	(shrink-window-horizontally arg)
+      (enlarge-window-horizontally arg)))
+
+  (defun hydra-move-splitter-right (arg)
+    "Move window splitter right."
+    (interactive "p")
+    (if (let ((windmove-wrap-around))
+	  (windmove-find-other-window 'right))
+	(enlarge-window-horizontally arg)
+      (shrink-window-horizontally arg)))
+
+  (defun hydra-move-splitter-up (arg)
+    "Move window splitter up."
+    (interactive "p")
+    (if (let ((windmove-wrap-around))
+	  (windmove-find-other-window 'up))
+	(enlarge-window arg)
+      (shrink-window arg)))
+
+  (defun hydra-move-splitter-down (arg)
+    "Move window splitter down."
+    (interactive "p")
+    (if (let ((windmove-wrap-around))
+	  (windmove-find-other-window 'up))
+	(shrink-window arg)
+      (enlarge-window arg)))
+
+  (defvar rectangle-mark-mode)
+  (defun hydra-ex-point-mark ()
+    "Exchange point and mark."
+    (interactive)
+    (if rectangle-mark-mode
+	(rectangle-exchange-point-and-mark)
+      (let ((mk (mark)))
+	(rectangle-mark-mode 1)
+	(goto-char mk))))
+
+  ;; move window splitter
+  (defhydra hydra-splitter (global-map "C-M-s")
+    "splitter"
+    ("h" hydra-move-splitter-left)
+    ("j" hydra-move-splitter-down)
+    ("k" hydra-move-splitter-up)
+    ("l" hydra-move-splitter-right))
+
+  ;; Hydra powered rectangle mode
+  (require 'rect)
+  (defhydra hydra-rectangle (:body-pre (rectangle-mark-mode 1)
+				       :color pink
+				       :post (deactivate-mark))
+    "
+  ^_k_^     _d_elete    _s_tring
+_h_   _l_   _o_k        _y_ank
+  ^_j_^     _n_ew-copy  _r_eset
+^^^^        _e_xchange  _u_ndo
+^^^^        ^ ^         _p_aste
+"
+    ("h" rectangle-backward-char nil)
+    ("l" rectangle-forward-char nil)
+    ("k" rectangle-previous-line nil)
+    ("j" rectangle-next-line nil)
+    ("e" hydra-ex-point-mark nil)
+    ("n" copy-rectangle-as-kill nil)
+    ("d" delete-rectangle nil)
+    ("r" (if (region-active-p)
+	     (deactivate-mark)
+	   (rectangle-mark-mode 1)) nil)
+    ("y" yank-rectangle nil)
+    ("u" undo nil)
+    ("s" string-rectangle nil)
+    ("p" kill-rectangle nil)
+    ("o" nil nil))
+
+  ;; substitute default binding
+  (global-set-key (kbd "C-x SPC") 'hydra-rectangle/body)
 
   ;; Zooming
-(defhydra hydra-zoom ()
+  (defhydra hydra-zoom (:color blue)
     "zoom"
     ("+" text-scale-increase "in")
     ("=" text-scale-increase "in")
@@ -25,5 +113,48 @@
 	     ("C-x C--" . hydra-zoom/body)
 	     ("C-x C-+" . hydra-zoom/body))
 
+  ;; Code folding using origami
+  (defhydra hydra-origami (:color blue)
+    "
+  _o_pen node   _O_pen node recurse   _n_ext fold      _s_how node only     toggle _f_orward
+  _c_lose node  _C_lose node recurse  _p_revious fold  toggle _r_ecurively  toggle _a_ll
+  "
+    ("o" origami-open-node)
+    ("O" origami-open-node-recursively)
+    ("c" origami-close-node)
+    ("C" origami-close-node-recursively)
+    ("n" origami-next-fold)
+    ("p" origami-previous-fold)
+    ("f" origami-forward-toggle-node)
+    ("a" origami-toggle-all-nodes)
+    ("r" origami-recursively-toggle-node)
+    ("s" origami-show-only-node))
+
+  (global-set-key (kbd "<f9> o") 'hydra-origami/body)
+  (bind-keys ("C-x C-o" . hydra-origami/body))
+
+  ;; Code folding using hideshow
+  (defhydra hydra-hideshow (:color blue)
+    "
+  _o_pen node   _O_pen node recurse   _n_ext fold      _s_how node only     toggle _f_orward
+  _c_lose node  _C_lose node recurse  _p_revious fold  toggle _r_ecurively  toggle _a_ll
+  "
+    ("o" hs-show-block)
+    ("O" hs-show-all)
+    ("c" hs-hide-block)
+    ("C" hs-hide-all)
+    ("n" hs-show-block)
+    ("p" hs-hide-block)
+    ("f" hs-toggle-hiding)
+    ("a" hs-toggle-hiding)
+    ("r" hs-hide-level)
+    ("s" hs-show_block))
+
+  (global-set-key (kbd "<f9> #") 'hydra-hideshow/body)
+  (bind-keys ("C-x C-#" . hydra-hideshow/body)))
+
 (provide '102-hydra)
+;; Local Variables:
+;; no-byte-compile: t
+;; End:
 ;;; 102-hydra.el ends here