Introduce a new special property CLOCKSUM_T for today's clocked time.

* org.el (org-special-properties): New special property
CLOCKSUM_T.
(org-entry-properties): Handle the new special property.

* org-colview.el (org-columns): Handle a new special property
CLOCKSUM_T.
(org-agenda-colview-summarize, org-agenda-colview-compute):
Ditto.

* org-clock.el (org-clock-sum-today): New function.
(org-clock-sum): New argument PROPNAME to set a custom text
property instead of :org-clock-minutes.

* org.texi (Special properties, Column attributes)
(Agenda column view): Document the new special property
CLOCKSUM_T.

Thanks to Brian Wood who asked a question wrt this.

doc/org.texi

@@ -4999,6 +4999,7 @@ used as keys in the properties drawer:
 @cindex property, special, TIMESTAMP
 @cindex property, special, TIMESTAMP_IA
 @cindex property, special, CLOCKSUM
+@cindex property, special, CLOCKSUM_T
 @cindex property, special, BLOCKED
 @c guessing that ITEM is needed in this area; also, should this list be sorted?
 @cindex property, special, ITEM
@@ -5018,6 +5019,9 @@ TIMESTAMP    @r{The first keyword-less timestamp in the entry.}
 TIMESTAMP_IA @r{The first inactive timestamp in the entry.}
 CLOCKSUM     @r{The sum of CLOCK intervals in the subtree.  @code{org-clock-sum}}
              @r{must be run first to compute the values in the current buffer.}
+CLOCKSUM_T   @r{The sum of CLOCK intervals in the subtree for today.}
+             @r{@code{org-clock-sum-today}} must be run first to compute the}
+             @r{values in the current buffer.}
 BLOCKED      @r{"t" if task is currently blocked by children or siblings}
 ITEM         @r{The headline of the entry.}
 FILE         @r{The filename the entry is located in.}
@@ -5235,7 +5239,7 @@ values.
 
 @example
 :COLUMNS:  %25ITEM %9Approved(Approved?)@{X@} %Owner %11Status \@footnote{Please note that the COLUMNS definition must be on a single line---it is wrapped here only because of formatting constraints.}
-                   %10Time_Estimate@{:@} %CLOCKSUM
+                   %10Time_Estimate@{:@} %CLOCKSUM %CLOCKSUM_T
 :Owner_ALL:    Tammy Mark Karl Lisa Don
 :Status_ALL:   "In progress" "Not started yet" "Finished" ""
 :Approved_ALL: "[ ]" "[X]"
@@ -5254,8 +5258,9 @@ modified title (@samp{Approved?}, with a question mark).  Summaries will
 be created for the @samp{Time_Estimate} column by adding time duration
 expressions like HH:MM, and for the @samp{Approved} column, by providing
 an @samp{[X]} status if all children have been checked.  The
-@samp{CLOCKSUM} column is special, it lists the sum of CLOCK intervals
-in the subtree.
+@samp{CLOCKSUM} and @samp{CLOCKSUM_T} columns are special, they lists the
+sums of CLOCK intervals in the subtree, either for all clocks or just for
+today.
 
 @node Using column view, Capturing column view, Defining columns, Column view
 @subsection Using column view
@@ -8940,6 +8945,14 @@ a column listing the planned total effort for a task---one of the major
 applications for column view in the agenda.  If you want information about
 clocked time in the displayed period use clock table mode (press @kbd{R} in
 the agenda).
+
+@item
+@cindex property, special, CLOCKSUM_T
+When the column view in the agenda shows the @code{CLOCKSUM_T}, that is
+always today's clocked time for this item.  So even in the weekly agenda,
+the clocksum listed in column view only originates from today.  This lets
+you compare the time you spent on a task for today, with the time already
+spent (via @code{CLOCKSUM}) and with the planned total effort for it.
 @end enumerate
 
 

lisp/org-clock.el

@@ -1618,13 +1618,20 @@ With prefix arg SELECT, offer recently clocked tasks for selection."
   "Holds the file total time in minutes, after a call to `org-clock-sum'.")
 (make-variable-buffer-local 'org-clock-file-total-minutes)
 
-(defun org-clock-sum (&optional tstart tend headline-filter)
+(defun org-clock-sum-today (&optional headline-filter)
+  "Sum the times for each subtree for today."
+  (interactive)
+  (let ((range (org-clock-special-range 'today)))
+    (org-clock-sum (car range) (cadr range) nil :org-clock-minutes-today)))
+
+(defun org-clock-sum (&optional tstart tend headline-filter propname)
   "Sum the times for each subtree.
 Puts the resulting times in minutes as a text property on each headline.
-TSTART and TEND can mark a time range to be considered.  HEADLINE-FILTER is a
-zero-arg function that, if specified, is called for each headline in the time
-range with point at the headline.  Headlines for which HEADLINE-FILTER returns
-nil are excluded from the clock summation."
+TSTART and TEND can mark a time range to be considered.
+HEADLINE-FILTER is a zero-arg function that, if specified, is called for
+each headline in the time range with point at the headline.  Headlines for
+which HEADLINE-FILTER returns nil are excluded from the clock summation.
+PROPNAME lets you set a custom text property instead of :org-clock-minutes."
   (interactive)
   (let* ((bmp (buffer-modified-p))
 	 (re (concat "^\\(\\*+\\)[ \t]\\|^[ \t]*"
@@ -1641,7 +1648,7 @@ nil are excluded from the clock summation."
     (if (consp tstart) (setq tstart (org-float-time tstart)))
     (if (consp tend) (setq tend (org-float-time tend)))
     (remove-text-properties (point-min) (point-max)
-                            '(:org-clock-minutes t
+                            `(,(or propname :org-clock-minutes) t
                               :org-clock-force-headline-inclusion t))
     (save-excursion
       (goto-char (point-max))
@@ -1690,7 +1697,8 @@ nil are excluded from the clock summation."
                           (aset ltimes l (+ (aref ltimes l) t1))))
 		(setq time (aref ltimes level))
 		(goto-char (match-beginning 0))
-		(put-text-property (point) (point-at-eol) :org-clock-minutes time)
+		(put-text-property (point) (point-at-eol)
+				   (or propname :org-clock-minutes) time)
                 (if headline-filter
                     (save-excursion
                       (save-match-data

lisp/org-colview.el

@@ -700,6 +700,11 @@ around it."
 	  (save-restriction
 	    (narrow-to-region beg end)
 	    (org-clock-sum))))
+      (when (assoc "CLOCKSUM_T" org-columns-current-fmt-compiled)
+	(save-excursion
+	  (save-restriction
+	    (narrow-to-region beg end)
+	    (org-clock-sum-today))))
       (while (re-search-forward org-outline-regexp-bol end t)
 	(if (and org-columns-skip-archived-trees
 		 (looking-at (concat ".*:" org-archive-tag ":")))
@@ -1406,8 +1411,8 @@ and tailing newline characters."
   "Summarize the summarizable columns in column view in the agenda.
 This will add overlays to the date lines, to show the summary for each day."
   (let* ((fmt (mapcar (lambda (x)
-			(if (equal (car x) "CLOCKSUM")
-			    (list "CLOCKSUM" (nth 1 x) (nth 2 x) ":" 'add_times
+			(if (string-match "CLOCKSUM.*" (car x))
+			    (list (match-string 0) (nth 1 x) (nth 2 x) ":" 'add_times
 				  nil '+ nil)
 			  x))
 		      org-columns-current-fmt-compiled))
@@ -1494,13 +1499,15 @@ This will add overlays to the date lines, to show the summary for each day."
 	    (goto-char (point-min))
 	    (org-columns-get-format-and-top-level)
 	    (while (setq fm (pop fmt))
-	      (if (equal (car fm) "CLOCKSUM")
-		  (org-clock-sum)
-		(when (and (nth 4 fm)
-			   (setq a (assoc (car fm)
-					  org-columns-current-fmt-compiled))
-			   (equal (nth 4 a) (nth 4 fm)))
-		  (org-columns-compute (car fm)))))))))))
+	      (cond ((equal (car fm) "CLOCKSUM")
+		     (org-clock-sum))
+		    ((equal (car fm) "CLOCKSUM_T")
+		     (org-clock-sum-today))
+		    ((and (nth 4 fm)
+			  (setq a (assoc (car fm)
+					 org-columns-current-fmt-compiled))
+			  (equal (nth 4 a) (nth 4 fm)))
+		     (org-columns-compute (car fm)))))))))))
 
 (defun org-format-time-period (interval)
   "Convert time in fractional days to days/hours/minutes/seconds."

lisp/org.el

@@ -14174,7 +14174,7 @@ a *different* entry, you cannot use these techniques."
 
 (defconst org-special-properties
   '("TODO" "TAGS" "ALLTAGS" "DEADLINE" "SCHEDULED" "CLOCK" "CLOSED" "PRIORITY"
-    "TIMESTAMP" "TIMESTAMP_IA" "BLOCKED" "FILE" "CLOCKSUM")
+    "TIMESTAMP" "TIMESTAMP_IA" "BLOCKED" "FILE" "CLOCKSUM" "CLOCKSUM_T")
   "The special properties valid in Org-mode.
 
 These are properties that are not defined in the property drawer,
@@ -14351,14 +14351,15 @@ things up because then unnecessary parsing is avoided."
     (let ((clockstr (substring org-clock-string 0 -1))
 	  (excluded '("TODO" "TAGS" "ALLTAGS" "PRIORITY" "BLOCKED"))
 	  (case-fold-search nil)
-	  beg end range props sum-props key key1 value string clocksum)
+	  beg end range props sum-props key key1 value string clocksum clocksumt)
       (save-excursion
 	(when (condition-case nil
 		  (and (derived-mode-p 'org-mode) (org-back-to-heading t))
 		(error nil))
 	  (setq beg (point))
 	  (setq sum-props (get-text-property (point) 'org-summaries))
-	  (setq clocksum (get-text-property (point) :org-clock-minutes))
+	  (setq clocksum (get-text-property (point) :org-clock-minutes)
+		clocksumt (get-text-property (point) :org-clock-minutes-today))
 	  (outline-next-heading)
 	  (setq end (point))
 	  (when (memq which '(all special))
@@ -14437,6 +14438,11 @@ things up because then unnecessary parsing is avoided."
 			  (org-columns-number-to-string (/ (float clocksum) 60.)
 						       'add_times))
 		    props))
+	  (if clocksumt
+	      (push (cons "CLOCKSUM_T"
+			  (org-columns-number-to-string (/ (float clocksumt) 60.)
+							'add_times))
+		    props))
 	  (unless (assoc "CATEGORY" props)
 	    (push (cons "CATEGORY" (org-get-category)) props))
 	  (append sum-props (nreverse props)))))))