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;;; ---------------------------------------------------------------------------
;;; License: LGPL-2.1+ (See file 'Copyright' for details).
;;; ---------------------------------------------------------------------------
;;;
;;; (c) Copyright 1998-2000 by Michael McDonald <mikemac@mikemac.com>
;;; (c) Copyright 2000 by Iban Hatchondo <hatchond@emi.u-bordeaux.fr>
;;; (c) Copyright 2000 by Julien Boninfante <boninfan@emi.u-bordeaux.fr>
;;; (c) Copyright 2000,2014 by Robert Strandh <robert.strandh@gmail.com>
;;; (c) Copyright 2022 by Daniel Kochmański <daniel@turtleware.eu>
;;;
;;; ---------------------------------------------------------------------------
;;;
;;; The Repaint Protocol.
;;;
(in-package #:clim-internals)
;;; Input protocol functions.
(defmethod handle-event ((sheet basic-sheet) (event window-repaint-event))
(dispatch-repaint sheet (window-event-region event)))
;;; Backward compatibility.
(defmethod queue-repaint ((sheet basic-sheet) (event window-repaint-event))
(dispatch-repaint sheet (window-event-region event)))
;;; Repaint protocol functions.
(defmethod handle-repaint ((sheet basic-sheet) region)
(declare (ignore region))
nil)
(defmethod repaint-sheet :around ((sheet basic-sheet) region)
(declare (ignore region))
(when (and (sheet-mirror sheet)
(sheet-viewable-p sheet))
(call-next-method)))
(defmethod handle-repaint :around ((sheet sheet-with-medium-mixin) region)
(typecase region
(nowhere-region)
(everywhere-region
(call-next-method))
(otherwise
(with-sheet-medium (medium sheet)
(letf (((medium-clipping-region medium) region))
(call-next-method))))))
;;; NOTE the native region may be smaller than the sheet region.
;;; NOTE see #1280 to learn why SHEET-NATIVE-REGION* is introduced.
;;; FIXME caching.
(defgeneric sheet-native-region* (sheet)
(:method ((sheet graft))
+everywhere+)
(:method ((sheet mirrored-sheet-mixin))
(if-let ((parent (sheet-parent sheet)))
(region-intersection
(sheet-region sheet)
(untransform-region (sheet-transformation sheet)
(sheet-native-region* parent)))
(sheet-region sheet)))
(:method ((sheet basic-sheet))
(if-let ((parent (sheet-parent sheet)))
(region-intersection
(transform-region (sheet-native-transformation sheet) (sheet-region sheet))
(sheet-native-region* (sheet-parent sheet)))
(sheet-region sheet))))
(defun sheet-visible-region (sheet)
(if (sheet-direct-mirror sheet)
(sheet-native-region* sheet)
(untransform-region (sheet-native-transformation sheet)
(sheet-native-region* sheet))))
(defun sheet-repaint-region (sheet region)
(let ((visible (sheet-visible-region sheet)))
(region-intersection visible region)))
(defmethod repaint-sheet ((sheet basic-sheet) region)
(setf region (sheet-repaint-region sheet region))
(unless (region-equal region +nowhere+)
(with-output-buffered (sheet)
(handle-repaint sheet region)
(loop for child in (reverse (sheet-children sheet))
unless (sheet-direct-mirror child)
do (let* ((tr (sheet-transformation child))
(cr (untransform-region tr region)))
(repaint-sheet child cr))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Repaint protocol classes.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Class STANDARD-REPAINTING-MIXIN.
(defclass standard-repainting-mixin () ())
(defmethod queue-repaint
((sheet standard-repainting-mixin) (region region))
(when-let ((msheet (sheet-mirrored-ancestor sheet)))
(error "Not implemented yet!")
;; Only repaint when the sheet has a mirror. Repaint directly from the
;; mirror to ensure, that transparent parts are rendered correctly.
#+ (or)
(if (eq msheet sheet)
(error "IMPLEMENTME")
(let* ((delta (sheet-delta-transformation sheet msheet))
(mregion (transform-region delta region)))
(error "IMPLEMENTME")))))
(defmethod dispatch-repaint ((sheet standard-repainting-mixin) region)
(queue-repaint sheet region))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Class IMMEDIATE-REPAINTING-MIXIN.
(defclass immediate-repainting-mixin () ())
;;; Backward compatibility.
(defmethod queue-repaint
((sheet immediate-repainting-mixin) (region region))
(dispatch-repaint sheet region))
(defmethod dispatch-repaint ((sheet immediate-repainting-mixin) region)
;; Only repaint when the sheet has a mirror. Repaint directly from the mirror
;; to ensure, that transparent parts are rendered correctly.
(when-let ((msheet (sheet-mirrored-ancestor sheet)))
(setf region (sheet-repaint-region sheet region))
(if (eq msheet sheet)
(repaint-sheet sheet region)
(let ((transf (sheet-delta-transformation sheet msheet)))
(dispatch-repaint msheet (transform-region transf region))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Class SHEET-MUTE-REPAINTING-MIXIN.
(defclass sheet-mute-repainting-mixin () ())
(defmethod dispatch-repaint ((sheet sheet-mute-repainting-mixin) region)
(declare (ignore sheet region))
(values))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; No Standard.
;; as present in silica's implementation
(defclass always-repaint-background-mixin () ())
;; never repaint the background (only for speed)
(defclass never-repaint-background-mixin () ())
(defmethod handle-repaint :before ((sheet always-repaint-background-mixin) region)
(when (typep sheet 'never-repaint-background-mixin)
(return-from handle-repaint))
(with-sheet-medium (medium sheet)
(with-bounding-rectangle* (x1 y1 x2 y2)
(region-intersection region (sheet-visible-region sheet))
(medium-clear-area medium x1 y1 x2 y2))))
;;; Integration with region and transformation changes
(defparameter *skip-repaint-p* nil)
(defun dispatch-repaint-region (sheet
old-transformation old-region
new-transformation new-region)
(when (and (not *skip-repaint-p*)
(sheet-viewable-p sheet))
(if (sheet-direct-mirror sheet)
(dispatch-repaint sheet new-region)
(dispatch-repaint (sheet-parent sheet)
(region-union
(rounded-bounding-rectangle
(transform-region old-transformation old-region))
(rounded-bounding-rectangle
(transform-region new-transformation new-region)))))))
(defmethod (setf sheet-region) :around (new-region (sheet basic-sheet))
(let ((old-region (sheet-region sheet)))
(unless (region-equal new-region old-region)
(let ((*skip-repaint-p* t))
(call-next-method))
(let ((transformation (sheet-transformation sheet)))
(dispatch-repaint-region sheet
transformation old-region
transformation new-region))))
new-region)
(defmethod (setf sheet-transformation) :around (new-transformation (sheet basic-sheet))
(let ((old-transformation (sheet-transformation sheet)))
(unless (transformation-equal new-transformation old-transformation)
(let ((*skip-repaint-p* t))
(call-next-method))
(let ((region (sheet-region sheet)))
(dispatch-repaint-region sheet
old-transformation region
new-transformation region))))
new-transformation)
(defun %set-sheet-region-and-transformation (sheet new-region new-transformation)
(let ((old-transformation (sheet-transformation sheet))
(old-region (sheet-region sheet)))
(unless (and (region-equal new-region old-region)
(transformation-equal new-transformation old-transformation))
(let ((*skip-repaint-p* t))
(setf (sheet-region sheet) new-region
(sheet-transformation sheet) new-transformation))
(dispatch-repaint-region sheet
old-transformation old-region
new-transformation new-region))))
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