diff options
Diffstat (limited to 'lisp/emacs-lisp/tabulated-list.el')
| -rw-r--r-- | lisp/emacs-lisp/tabulated-list.el | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/lisp/emacs-lisp/tabulated-list.el b/lisp/emacs-lisp/tabulated-list.el index 15a0914cb17..5d10b55d14c 100644 --- a/lisp/emacs-lisp/tabulated-list.el +++ b/lisp/emacs-lisp/tabulated-list.el @@ -179,7 +179,9 @@ If ADVANCE is non-nil, move forward by one line afterwards." table) "The `glyphless-char-display' table in Tabulated List buffers.") -(defvar tabulated-list--header-string nil) +(defvar tabulated-list--header-string nil + "Holds the header if `tabulated-list-use-header-line' is nil. +Populated by `tabulated-list-init-header'.") (defvar tabulated-list--header-overlay nil) (defun tabulated-list-init-header () @@ -243,15 +245,17 @@ If ADVANCE is non-nil, move forward by one line afterwards." (setq-local tabulated-list--header-string cols)))) (defun tabulated-list-print-fake-header () - "Insert a fake Tabulated List \"header line\" at the start of the buffer." - (goto-char (point-min)) - (let ((inhibit-read-only t)) - (insert tabulated-list--header-string "\n") - (if tabulated-list--header-overlay - (move-overlay tabulated-list--header-overlay (point-min) (point)) - (setq-local tabulated-list--header-overlay - (make-overlay (point-min) (point)))) - (overlay-put tabulated-list--header-overlay 'face 'underline))) + "Insert a fake Tabulated List \"header line\" at the start of the buffer. +Do nothing if `tabulated-list--header-string' is nil." + (when tabulated-list--header-string + (goto-char (point-min)) + (let ((inhibit-read-only t)) + (insert tabulated-list--header-string "\n") + (if tabulated-list--header-overlay + (move-overlay tabulated-list--header-overlay (point-min) (point)) + (setq-local tabulated-list--header-overlay + (make-overlay (point-min) (point)))) + (overlay-put tabulated-list--header-overlay 'face 'underline)))) (defun tabulated-list-revert (&rest ignored) "The `revert-buffer-function' for `tabulated-list-mode'. @@ -341,8 +345,10 @@ of column descriptors." (dotimes (n ncols) (setq x (tabulated-list-print-col n (aref cols n) x))) (insert ?\n) - (put-text-property beg (point) 'tabulated-list-id id) - (put-text-property beg (point) 'tabulated-list-entry cols))) + ;; Ever so slightly faster than calling `put-text-property' twice. + (add-text-properties + beg (point) + `(tabulated-list-id ,id tabulated-list-entry ,cols)))) (defun tabulated-list-print-col (n col-desc x) "Insert a specified Tabulated List entry at point. |