org-colview: Add property :exclude-tags to column view table

* lisp/org-colview.el (org-columns--capture-view): Add parameter.
(org-dblock-write:columnview): Add new property.
* doc/org-manual.org (Capturing column view): Document feature.
* testing/lisp/test-org-colview.el (test-org-colview/dblock): Add
  test.

This addition allows to specify a list of tags to exclude from column
view tables.

TINYCHANGE

doc/org-manual.org

@@ -5653,6 +5653,11 @@ This dynamic block has the following parameters:
      When non-~nil~, skip rows where the only non-empty specifier of
      the column view is =ITEM=.
 
+- =:exclude-tags= ::
+
+     List of tags to exclude from column view table: entries with
+     these tags will be excluded from the column view.
+
 - =:indent= ::
 
      When non-~nil~, indent each =ITEM= field according to its level.

lisp/org-colview.el

@@ -1317,14 +1317,15 @@ and variances (respectively) of the individual estimates."
 
 ;;; Dynamic block for Column view
 
-(defun org-columns--capture-view (maxlevel match skip-empty format local)
+(defun org-columns--capture-view (maxlevel match skip-empty exclude-tags format local)
   "Get the column view of the current buffer.
 
 MAXLEVEL sets the level limit.  SKIP-EMPTY tells whether to skip
 empty rows, an empty row being one where all the column view
-specifiers but ITEM are empty.  FORMAT is a format string for
-columns, or nil.  When LOCAL is non-nil, only capture headings in
-current subtree.
+specifiers but ITEM are empty.  EXCLUDE-TAGS is a list of tags
+that will be excluded from the resulting view.  FORMAT is a
+format string for columns, or nil.  When LOCAL is non-nil, only
+capture headings in current subtree.
 
 This function returns a list containing the title row and all
 other rows.  Each row is a list of fields, as strings, or
@@ -1347,9 +1348,13 @@ other rows.  Each row is a list of fields, as strings, or
 					     'org-columns-value
 					   'org-columns-value-modified)))
 		     row)))
-	   (unless (and skip-empty
-			(let ((r (delete-dups (remove "" row))))
-			  (or (null r) (and has-item (= (length r) 1)))))
+	   (unless (or
+		    (and skip-empty
+			 (let ((r (delete-dups (remove "" row))))
+			   (or (null r) (and has-item (= (length r) 1)))))
+		    (and exclude-tags
+			 (cl-some (lambda (tag) (member tag exclude-tags))
+				  (org-get-tags))))
 	     (push (cons (org-reduced-level (org-current-level)) (nreverse row))
 		   table)))))
      (or (and maxlevel (format "LEVEL<=%d" maxlevel))
@@ -1394,6 +1399,8 @@ PARAMS is a property list of parameters:
 :match    When set to a string, use this as a tags/property match filter.
 :skip-empty-rows
 	  When t, skip rows where all specifiers other than ITEM are empty.
+:exclude-tags
+          List of tags to exclude from column view table.
 :format   When non-nil, specify the column view format to use."
   (let ((table
 	 (let ((id (plist-get params :id))
@@ -1419,6 +1426,7 @@ PARAMS is a property list of parameters:
 	      (org-columns--capture-view (plist-get params :maxlevel)
 					 (plist-get params :match)
 					 (plist-get params :skip-empty-rows)
+					 (plist-get params :exclude-tags)
 					 (plist-get params :format)
 					 view-pos))))))
     (when table

testing/lisp/test-org-colview.el

@@ -1470,6 +1470,26 @@
 ** H1.1
 :PROPERTIES:
 :A: 1
+:END:"
+      (let ((org-columns-default-format "%ITEM %A")) (org-update-dblock))
+      (buffer-substring-no-properties (point) (outline-next-heading)))))
+  ;; Test `:exclude-tags' parameter.
+  (should
+   (equal
+    "#+BEGIN: columnview :exclude-tags (\"excludeme\")
+| ITEM | A |
+|------+---|
+| H1   |   |
+#+END:
+"
+    (org-test-with-temp-text
+        "
+* H1
+<point>#+BEGIN: columnview :exclude-tags (\"excludeme\")
+#+END:
+** H1.1 :excludeme:
+:PROPERTIES:
+:A: 1
 :END:"
       (let ((org-columns-default-format "%ITEM %A")) (org-update-dblock))
       (buffer-substring-no-properties (point) (outline-next-heading)))))