New 'ledger-indent-region' function

* ledger-mode.el (ledger-mode): Set indent-region-function.
* ledger-post.el (ledger-indent-region): New function that indents the
region by calling ledger-indent-line for each line.

Closes bug ledger#197

ledger-mode.el

@@ -325,7 +325,7 @@ With a prefix argument, remove the effective date."
   (ledger-init-load-init-file)
   (setq-local comment-start ";")
   (setq-local indent-line-function #'ledger-indent-line)
-  (setq-local indent-region-function 'ledger-post-align-postings))
+  (setq-local indent-region-function #'ledger-indent-region))
 
 ;;;###autoload
 (add-to-list 'auto-mode-alist '("\\.ledger\\'" . ledger-mode))

ledger-post.el

@@ -140,6 +140,19 @@ Looks only as far as END, if supplied, otherwise `point-max'."
   (when ledger-post-auto-align
     (ledger-post-align-postings (line-beginning-position) (line-end-position))))
 
+(defun ledger-indent-region (beg end)
+  "Indent the region from BEG to END.
+This works by calling `ledger-indent-line' for each line."
+  (save-excursion
+    (goto-char beg)
+    (beginning-of-line)
+    (ledger-indent-line)
+    (while (< (point) end)
+      (forward-line)
+      (ledger-indent-line))
+    (when (looking-at-p "[[:space:]]+")
+      (cycle-spacing 0))))
+
 (defun ledger-post-align-dwim ()
   "Align all the posting of the current xact or the current region.
 

test/post-test.el

@@ -453,6 +453,22 @@ http://bugs.ledger-cli.org/show_bug.cgi?id=946"
     Assets:Bar
 " ))))
 
+(ert-deftest ledger-post/test-197 ()
+  "Regress test for Bug #197"
+  :tags '(post regress)
+  (ledger-tests-with-temp-file
+      "2019/08/13 Test
+this  8000 GBP
+out"
+    (let ((ledger-post-auto-align nil))
+      (set-mark-command nil)
+    (goto-char (point-max))
+    (call-interactively #'indent-for-tab-command)
+    (should (string= (buffer-substring-no-properties (point-min) (point-max))
+                           "2019/08/13 Test
+    this  8000 GBP
+    out")))))
+
 
 (provide 'post-test)