diff options
Diffstat (limited to 'lisp/rect.el')
-rw-r--r-- | lisp/rect.el | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lisp/rect.el b/lisp/rect.el index 8ccf051ee18..48db4ffd8f4 100644 --- a/lisp/rect.el +++ b/lisp/rect.el @@ -167,6 +167,37 @@ The final point after the last operation will be returned." (<= (point) endpt)))) final-point))) +(defun rectangle-position-as-coordinates (position) + "Return cons of the column and line values of POSITION. +POSITION specifies a position of the current buffer. The value +returned is a cons of the current column of POSITION and its line +number." + (save-excursion + (goto-char position) + (let ((col (current-column)) + (line (1- (line-number-at-pos)))) + (cons col line)))) + +(defun rectangle-intersect-p (pos1 size1 pos2 size2) + "Return non-nil if two rectangles intersect. +POS1 and POS2 specify the positions of the upper-left corners of +the first and second rectangle as conses of their column and line +values. SIZE1 and SIZE2 specify the dimensions of the first and +second rectangle, as conses of their width and height measured in +columns and lines." + (let ((x1 (car pos1)) + (y1 (cdr pos1)) + (x2 (car pos2)) + (y2 (cdr pos2)) + (w1 (car size1)) + (h1 (cdr size1)) + (w2 (car size2)) + (h2 (cdr size2))) + (not (or (<= (+ x1 w1) x2) + (<= (+ x2 w2) x1) + (<= (+ y1 h1) y2) + (<= (+ y2 h2) y1))))) + (defun delete-rectangle-line (startcol endcol fill) (when (= (move-to-column startcol (if fill t 'coerce)) startcol) (delete-region (point) |