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;;; xwem-frame.el -- Frames ops for XWEM.

;; Copyright (C) 2003 by Free Software Foundation, Inc.

;; Author: Zajcev Evgeny <zevlg@yandex.ru>
;; Created: 21 Mar 2003
;; Keywords: xlib, xwem
;; X-CVS: $Id$

;; This file is part of XWEM.

;; XWEM is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; XWEM is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
;; License for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Synched up with: Not in FSF

;;; Commentary

;; This file contain operations on XWEM frames.
;;

;;; Code


(autoload 'X-XIneramaQueryScreens "xlib-xinerama")

;;; Variables
(defgroup xwem-frame nil
  "Group to customize xwem frames."
  :prefix "xwem-frame-"
  :prefix "xwem-face-"
  :group 'xwem)

(defcustom xwem-frame-background "gray60"
  "*Frame background color."
  :type '(restricted-sexp :match-alternatives (xwem-misc-colorspec-valid-p))
  :group 'xwem-frame)

(defcustom xwem-frame-cursor-shape 'X-XC-left_ptr
  "*Cursors shape which will be used when pointer is over xwem frame."
  :type (xwem-cursor-shape-choice)
  :group 'xwem-frame)

(defcustom xwem-frame-cursor-foreground-color "#002800"
  "*Cursor's foreground color used when pointer is on xwem's frame."
  :type '(restricted-sexp :match-alternatives ('nil xwem-misc-colorspec-valid-p))
  :group 'xwem-frame)

(defcustom xwem-frame-cursor-background-color "#000000"
  "*Cursor's background color used when pointer is on xwem's frame."
  :type '(restricted-sexp :match-alternatives ('nil xwem-misc-colorspec-valid-p))
  :group 'xwem-frame)

(defcustom xwem-frame-defprops
  (list 'inner-border-width 0		;internal border of xwem's frame
	'otter-border-width 0		;
	'title-height 17		; TODO: maybe create 'auto to fit font height?
	'title-thickness 2		;
	)
  "*Default PLIST for frame"
  :type '(restricted-sexp :match-alternatives (valid-plist-p))
  :group 'xwem-frame)

(defface xwem-face-frame-selected-win-selected
  `((t (:foreground "green" :background "green4" :line-width 3)))
  "Face to outline selected window in selected frame."
  :group 'xwem-frame
  :group 'xwem-faces)

(defface xwem-face-frame-selected-win-nonselected
  `((t (:foreground "blue4" :background "blue4" :line-style X-LineDoubleDash)))
  "Face to outline nonselected window in selected frame."
  :group 'xwem-frame
  :group 'xwem-faces)

(defface xwem-face-frame-nonselected-win-selected
  `((t (:foreground "green4" :background "green4" :line-width 2)))
  "Face to outline selected window in nonselected frame."
  :group 'xwem-frame
  :group 'xwem-faces)

(defface xwem-face-frame-nonselected-win-nonselected
  `((t (:foreground "blue4" :background "blue" :line-style X-LineDoubleDash)))
  "Face to outline nonselected window in nonselected frame."
  :group 'xwem-frame
  :group 'xwem-faces)

(defface xwem-face-win-delimeter
  `((t (:foreground "gray80" :background "black")))
  "Face to draw window delimeter."
  :group 'xwem-frame
  :group 'xwem-faces)

(defface xwem-face-win-delimeter-shadow
  `((t (:foreground "gray50" :background "black")))
  "Face to draw shadow of window delimeter."
  :group 'xwem-frame
  :group 'xwem-faces)

(defcustom xwem-frame-rolling-switch t
  "*Non-nil mean that \\<xwem-global-map>\\[xwem-frame-next] and
\\<xwem-global-map>\\[xwem-frame-previous] will always switch, even if
there no next or previous frame."
  :type 'boolean
  :group 'xwem-frame)

(defcustom xwem-frame-switch-hook nil
  "Hooks to be called when frame switching occurs (i.e. `xwem-current-frame' changes).
 Function will receive two arguments OLD-FRAME and NEW-FRAME."
  :type 'hook
  :group 'xwem-hooks)

;; Variables
;;;###autoload
(defconst xwem-frame-ev-mask (Xmask-or XM-Exposure
				       XM-StructureNotify
				       XM-SubstructureRedirect
				       XM-SubstructureNotify
				       XM-EnterWindow XM-LeaveWindow
				       XM-KeyPress XM-ButtonPress XM-ButtonRelease
				       XM-FocusChange
				       XM-ResizeRedirect)
  "Events mask for xwem's frame.")

(defvar xwem-frame-keymap
  (let ((map (make-sparse-keymap)))
    (define-key map [button1] 'xwem-frame-on-delim-resize)
    (define-key map [button3] 'xwem-frame-on-delim-menu)
    
    (set-keymap-parent map xwem-global-map)
    map)
  "Keymap used in frames.")

(defvar xwem-frame-cursor nil "Cursor used for xwem frame.")

;;;###autoload
(defvar xwem-frames-list nil "All frames xwem owns.")

(defvar xwem-current-frame nil "Current frame.")

;;;###autoload
(defstruct (xwem-frame (:predicate xwem-isframe-p))
  (name "default")                      ; frame name
  xgeom					; frame geometry
  xwin					; X window 
  rootwin				; XWEM's root window for frame
  selwin				; XWEM's selected window
  link-next				; Link to next xwem's frame in linkage
  link-prev				; Link to prev xwem's frame in linkage
  embedded-p				; Non-nil when frame is embedded
  state					; 'mapped, 'unmapped, 'destroyed

  tabber				; xwem-tabber
  props)				; Properties list


;;; Functions
;;;###autoload
(defun xwem-frame-p (frame &optional sig)
  "Return t if FRAME is XWEM frame."
  (let ((isfr (xwem-isframe-p frame)))
    (if (and sig (not isfr) )
	(signal 'wrong-type-argument (list sig 'xwem-frame-p frame))
      isfr)))

;;;###autoload
(defmacro xwem-frame-x (frame)
  `(X-Geom-x (xwem-frame-xgeom ,frame)))
;;;###autoload
(defmacro xwem-frame-y (frame)
  `(X-Geom-y (xwem-frame-xgeom ,frame)))
;;;###autoload
(defmacro xwem-frame-width (frame)
  `(X-Geom-width (xwem-frame-xgeom ,frame)))
;;;###autoload
(defmacro xwem-frame-height (frame)
  `(X-Geom-height (xwem-frame-xgeom ,frame)))

(defsetf xwem-frame-x (frame) (x)
  `(setf (X-Geom-x (xwem-frame-xgeom ,frame)) ,x))
(defsetf xwem-frame-y (frame) (y)
  `(setf (X-Geom-y (xwem-frame-xgeom ,frame)) ,y))
(defsetf xwem-frame-width (frame) (width)
  `(let ((tabber (xwem-frame-tabber ,frame)))
     (when (xwem-tabber-p tabber)
       (setf (X-Geom-width (xwem-tabber-xgeom tabber)) ,width))

     (setf (X-Geom-width (xwem-frame-xgeom ,frame)) ,width)))
(defsetf xwem-frame-height (frame) (height)
  `(setf (X-Geom-height (xwem-frame-xgeom ,frame)) ,height))

(defsubst xwem-frame-alive-p (frame)
  "Return non-nil if FRAME is alive XWEM frame, i.e. which is in `xwem-frames-list'."
  (member frame xwem-frames-list))

(defsubst xwem-frame-mapped-p (frame)
  "Return non-nil if xwem FRAME is mapped."
  (and (xwem-frame-p frame)
       (eq (xwem-frame-state frame) 'mapped)))

(defun xwem-frame-unmap (frame)
  "Unmap frame FRAME."
  (when (xwem-frame-mapped-p frame)
    (XSelectInput (xwem-dpy) (xwem-frame-xwin frame) 0)
    (XUnmapWindow (xwem-dpy) (xwem-frame-xwin frame))
    (setf (xwem-frame-state frame) 'unmapped)))

(defun xwem-frame-map (frame)
  "Map frame FRAME."
  (unless (xwem-frame-mapped-p frame)
    (XSelectInput (xwem-dpy) (xwem-frame-xwin frame) xwem-frame-ev-mask)

    (XMapWindow (xwem-dpy) (xwem-frame-xwin frame))
    (setf (xwem-frame-state frame) 'mapped)))

;;;###autoload
(defun xwem-frame-selected ()
  "Return selected frame."
  xwem-current-frame)

;;;###autoload
(defun xwem-frame-selected-p (frame)
  "Return non-nil if FRAME is selected."
  (eq frame (xwem-frame-selected)))

(defun xwem-frame-embedded-for-frame (frame)
  "Return XWEM frame for which FRAME is embedded."
  (let* ((cl (and (xwem-frame-p frame)
		  (xwem-find-client (xwem-frame-xwin frame))))
	 (rv (and (xwem-cl-p cl)
		  (xwem-cl-frame cl))))
    rv))

(defun xwem-frame-embedded-pop (frame)
  "Pop embedded FRAME, see also `xwem-cl-pop-to-client'."
  (let* ((cl (xwem-find-client (xwem-frame-xwin frame)))
	 (clfr (and (xwem-cl-p cl) (xwem-cl-frame cl)))
	 (clw (and (xwem-cl-p cl) (xwem-cl-win cl))))

    (when (null clfr)
      (setq clfr (xwem-frame-selected)))
    (when (null clw)
      (setq clw (xwem-win-selected)))

    ;; Raise frame in which we are embedded.
    (when (not (xwem-frame-selected-p clfr))
      (if (xwem-frame-embedded-p clfr)
	  (xwem-frame-embedded-pop clfr)
	(xwem-frame-raise clfr)))

    (when (not (xwem-win-selected-p clw))
      (xwem-window-select clw))

    (xwem-manda-fun-run (xwem-cl-manda cl) 'manage cl clw)))

;;;###autoload
(defun xwem-frame-select (frame &optional dnr-hooks)
  "Set FRAME as selected frame.
If DNR-HOOKS is non-nil, than do not run hooks."

  ;; If FRAME is embedded frame we should raise frame in whose
  ;; window FRAME is embedded.
  (when (xwem-frame-embedded-p frame)
    (xwem-frame-embedded-pop frame))

  (let ((ofr (xwem-frame-selected))
	(nfr frame))

    (setq xwem-current-frame frame)

    ;; Now raise and set input focus to FRAME
    (xwem-frame-raise nfr)
    (xwem-focus-set frame)

    (when (not dnr-hooks)
      (run-hook-with-args 'xwem-frame-switch-hook ofr nfr))))

(defun xwem-frame-select-defhook (ofr nfr)
  "Default hook for `xwem-frame-switch-hook'.
NOT USED."
  ;; Here is OFR may be invisible, but we redraw it in case it is
  ;; visible.
  (X-Dpy-send-excursion (xwem-dpy)
    (when (and (xwem-frame-p ofr)
	       (xwem-frame-alive-p ofr))
      (xwem-tabber-draw (xwem-frame-tabber ofr))
      (xwem-frame-redraw ofr))

    (when (and (xwem-frame-p nfr)
	       (xwem-frame-alive-p nfr))
      (xwem-tabber-draw (xwem-frame-tabber nfr))
      (xwem-frame-redraw nfr))
    nil))				; continue hooks processing

;;;###autoload
(defun xwem-make-frame-1 (&optional embedded-p params props non-select)
  "Create new frame with optional frame properties PROPS.
If EMBEDDED-p is non-nil than create embedded frame.
If NON-SELECT is non-nil then do not select newly created frame to be
current."
  (let* ((fplist (copy-sequence xwem-frame-defprops))
	 (frame (apply 'make-xwem-frame params)))

    (setf (xwem-frame-embedded-p frame) embedded-p)

    ;; setup properties
    (while props
      (setq fplist (plist-put fplist (car props) (cadr props)))
      (setq props (cddr props)))
    (setf (xwem-frame-props frame) fplist)

    (unless (xwem-frame-xgeom frame)
      (setf (xwem-frame-xgeom frame) (make-X-Geom)))

    (unless (xwem-frame-x frame)
      (setf (xwem-frame-x frame) 0))
    (unless (xwem-frame-y frame)
      (setf (xwem-frame-y frame) 0))
    (unless (xwem-frame-width frame)
      (setf (xwem-frame-width frame) (X-Geom-width (xwem-rootgeom))))
    (unless (xwem-frame-height frame)
      (setf (xwem-frame-height frame)
	    (- (X-Geom-height (xwem-rootgeom))
	       (if (X-Geom-p (xwem-minib-xgeom xwem-minibuffer))
		   (X-Geom-height (xwem-minib-xgeom xwem-minibuffer))
		 0))))

    ;; We should not process events before frame's window events
    ;; handler installed
    (setf (xwem-frame-xwin frame)
	  (XCreateWindow
	   (xwem-dpy) nil
	   (xwem-frame-x frame)
	   (xwem-frame-y frame)
	   (xwem-frame-width frame)
	   (xwem-frame-height frame)
	   (xwem-frame-get-prop frame 'inner-border-width)
	   nil				;DefaultDepth
	   nil				;CopyFromParent
	   nil				;CopyFromParent
	   (make-X-Attr :override-redirect 0
			:background-pixel (XAllocNamedColor
					   (xwem-dpy) (XDefaultColormap (xwem-dpy))
					   xwem-frame-background
					   (make-X-Color :dpy (xwem-dpy)))
			:border-pixel (XBlackPixel (xwem-dpy))
			:cursor xwem-frame-cursor
			:event-mask xwem-frame-ev-mask)))

    ;; Create tabber
    (setf (xwem-frame-tabber frame)
	  (xwem-tabber-create frame (make-X-Geom :x 0 :y 0 :width (xwem-frame-width frame)
						 :height (xwem-frame-get-prop frame 'title-height))
			      'unknown))

    (let ((fwin (xwem-frame-xwin frame))
	  parwin)
      (X-Win-EventHandler-add-new fwin 'xwem-frame-events-handler 200)
      (X-Win-EventHandler-add-new fwin 'xwem-ev-reconfig 90 (list X-ConfigureRequest))

      ;; XXX XXX XXX Setup various hints
      (XSetWMClass (xwem-dpy) fwin
		   '("xwem-frame" "xwem-frame"))
      (XSetWMName (xwem-dpy) fwin
		  (format "xwem-frame[%d]" (length xwem-frames-list)))

      ;; Initialize root window
      (setq parwin (xwem-win-new (list :frame frame) nil))

      (setf (xwem-win-x parwin)
	    (xwem-frame-get-prop frame 'otter-border-width))
      (setf (xwem-win-y parwin)
	    (+ (xwem-frame-get-prop frame 'title-height)
	       (xwem-frame-get-prop frame 'otter-border-width)))
      (setf (xwem-win-width parwin)
	    (- (xwem-frame-width frame)
	       (* 2 (xwem-frame-get-prop frame 'otter-border-width))))
      (setf (xwem-win-height parwin)
	    (- (xwem-frame-height frame)
	       (xwem-frame-get-prop frame 'title-height)
	       (* 2 (xwem-frame-get-prop frame 'otter-border-width))))

      (setf (xwem-frame-selwin frame) parwin)
      (setf (xwem-frame-rootwin frame) parwin)

      ;; Add to the end of frames list
      (if xwem-frames-list
	  (setcdr (last xwem-frames-list) (list frame))
	(setq xwem-frames-list (list frame)))

      ;; Handle as client, i.e. make frame to be embedded
      (when embedded-p
	(xwem-make-client (xwem-frame-xwin frame) nil))

      ;; Finally map and maybe select newly created frame
      (xwem-frame-map frame)

      ;; TODO:
      ;;   Actually here we should wait for an Expose event, according to
      ;;   some standard.
;      (unless embedded-p
;	;; Not for embedded frames
;	(XIfEvent (xwem-dpy)
;		  (lambda (xev)
;		    (and (= (X-Event-type xev) X-Expose)
;			 (= (X-Win-id (X-Event-win xev)) (X-Win-id fwin))))))

      ;; Install grabbing
      (unless embedded-p
	(xwem-kbd-install-grab xwem-global-map fwin))
      
      (unless non-select
	(xwem-frame-select frame))

      ;; Now draw frames contents.
;      (unless embedded-p
;	(xwem-frame-draw frame nil))
      )

    frame))

(defun xwem-frame-track-wmname-change (cl)
  "Called when WM_NAME of CL changes.
Used in `xwem-wmname-change-hooks'."
  (let ((new-name (xwem-hints-wm-name (xwem-cl-hints cl)))
	frame win)

  (unless (string= (xwem-cl-saved-name cl) new-name)
    (setf (xwem-cl-saved-name cl) new-name)
    (setq frame (xwem-frame-find 'cl cl))
    (when (xwem-frame-p frame)
      (setq win (xwem-cl-win cl))
      (when (and (xwem-win-p win)
		 (xwem-win-selected-p win (xwem-win-frame win)))
	(xwem-tab-item-draw-format (xwem-cl-tabitem cl)))))))

(defun xwem-init-frame-at-rect (xrect)
  "Create frame to fit in XRECT rectangle."
  (let ((xmrect (make-X-Rect :x 0 :y 0 :width (X-Geom-width (xwem-rootgeom))
			     :height
			     (if (xwem-minib-frame xwem-minibuffer)
				 (frame-pixel-height (xwem-minib-frame xwem-minibuffer))
			       0))))

    (when (X-Rect-intersect-p xmrect xrect)
      ;; Take into account this intersection
      (setf (X-Rect-height xrect)
	    (- (X-Rect-height xrect)
	       (X-Rect-height xmrect))))
    
    (xwem-make-frame-1 nil (list :xgeom (X-Rect-to-X-Geom xrect)) nil t)))

(defun xwem-frame-adjust-geom (frame new-rect)
  "Adjust FRAME geom according to NEW-RECT and xwem-minibuffer geom."
  (let ((mrect (X-Geom-to-X-Rect (xwem-minib-xgeom xwem-minibuffer)))
	ngeom)

    (when (X-Rect-intersect-p new-rect mrect)
      (setf (X-Rect-height new-rect)
	    (- (X-Rect-height new-rect)
	       (X-Rect-height mrect))))

    (setq ngeom (X-Rect-to-X-Geom new-rect))
    (setf (X-Geom-border-width ngeom)
	  (X-Geom-border-width (xwem-frame-xgeom frame)))

    (setf (xwem-frame-xgeom frame) ngeom)))

;;;###autoload
(defun xwem-init-frames ()
  "xwem frames initializer."
  (xwem-message 'msg "Initializing frames ... wait")
  (setq xwem-frames-list nil)
  (setq xwem-current-frame nil)

  ;; Create cursor used while pointer is over xwem frame
  (setq  xwem-frame-cursor (xwem-make-cursor (eval xwem-frame-cursor-shape)
					     xwem-frame-cursor-foreground-color
					     xwem-frame-cursor-background-color))

  ;; Initialize tabbing stuff
  (xwem-init-tabber)

  ;; Add WM_XXX trackers
  (add-hook 'xwem-wmname-change-hooks 'xwem-frame-track-wmname-change)

  ;; Xinerama stuff
  (let ((xin (X-XIneramaQueryScreens (xwem-dpy))))
    (if (car xin)
	;; XInerama enabled
	(while (setq xin (cdr xin))
	  (xwem-init-frame-at-rect (car xin)))

;      (xwem-init-frame-at-rect (make-X-Rect :x 300 :y 300 :width 200 :height 200))))
      (xwem-init-frame-at-rect (X-Geom-to-X-Rect (xwem-rootgeom)))))

  ;; Select very first frame
  (xwem-frame-select (car xwem-frames-list))
  )

;;;###autoload
(defun xwem-fini-frames ()
  "Finialize frames."
  (mapc (lambda (frame)
	  (xwem-frame-destroy frame))
	xwem-frames-list))

(define-xwem-command xwem-make-frame (arg)
  "Create new XWEM frame.
If ARG is non-nil then create embedded frame."
  (xwem-interactive "P")

  (xwem-make-frame-1 arg))

(defun xwem-frame-cl (frame)
  "Return currently active xwem client in FRAME."
  (xwem-win-cl (xwem-frame-selwin frame)))

;;;###autoload
(defun xwem-find-frame (win)
  ;;XXX rewrite me
  (let ((flist xwem-frames-list)
	(rf nil))
    (while flist
      (if (= (X-Win-id win)
	     (X-Win-id (xwem-frame-xwin (car flist))))
	  (progn
	    (setq rf (car flist))
	    (setq flist nil))
	(setq flist (cdr flist))))
    rf))

;;;###autoload
(defun xwem-frame-find (how arg)
  "Find frame by ARG. HOW is search type, one of 'xwin 'win 'cl."
  (let ((flist xwem-frames-list)
	(rf nil))

    (while flist
      (if (cond ((and (eq how 'xwin)
		      (X-Win-p arg)
		      (= (X-Win-id arg) (X-Win-id (xwem-frame-xwin (car flist)))))
		 t)
	    
		((and (eq how 'win)
		      (eq (xwem-win-frame arg) (car flist)))
		 t)

		((and (eq how 'cl)
		      (eq (xwem-cl-frame arg) (car flist)))
		 t)

		(t nil))
	  (progn
	    (setq rf (car flist))
	    (setq flist nil))

	(setq flist (cdr flist))))
    rf))

(defun xwem-frame-other-frame (frame)
  "Return other frame for FRAME.
NOTE: not yet implemented"
  
  ;; Try linkage, and then try closest frame
  (let ((oframe (xwem-frame-link-next frame)))
    (unless (xwem-frame-p oframe)
      (setq oframe (xwem-frame-link-prev frame)))
    (unless (xwem-frame-p oframe)
      (setq oframe (nth 0 xwem-frames-list)))
    oframe))

;;;###autoload
(defun xwem-frame-other (frame &optional type)
  "Same as `xwem-frame-other-frame', but return nil, if no good other frame found.
TYPE is ane of 'any, 'linkage"
  (unless type
    (setq type 'any))

  ;; First try linkaged frames
  (let ((allframes xwem-frames-list)
	(oframe (xwem-frame-link-next frame)))
    (unless (xwem-frame-mapped-p oframe)
      (setq oframe (xwem-frame-link-prev frame)))

    ;; Now try parent in case when FRAME is embedded frame.
    (unless (xwem-frame-mapped-p oframe)
      (when (xwem-frame-embedded-p frame)
	(let ((cl (xwem-find-client (xwem-frame-xwin frame))))
	  (when (xwem-cl-p cl)
	    (setq oframe (xwem-cl-frame cl))))))

    (when (and (not (xwem-frame-mapped-p oframe))
	       (eq type 'any))
      ;; Scan frames list only for 'any TYPE
      (while (and allframes (not (xwem-frame-mapped-p oframe)))
	(when (and (xwem-frame-mapped-p (car allframes))
		   (not (eq frame (car allframes))))
	  (setq oframe (car allframes))
	  (setq allframes nil))
	(setq allframes (cdr allframes))))
    oframe))

;;;###autoload
(defun xwem-frame-num (frame)
  "Return FRAME index in `xwem-frames-list'."
  (xwem-frame-p frame 'xwem-frame-num)
  (let ((fl xwem-frames-list)
	(num 0))
    (while fl
      (if (eq frame (car fl))
	  (setq fl nil)
	(setq num (+ 1 num))
	(setq fl (cdr fl))))
  num))

(defun xwem-frame-xy-in-p (x y frame)
  "Return non-nil if point at X Y is in FRAME."
  (and (>= x (xwem-frame-x frame))
       (<= x (+ (xwem-frame-x frame) (xwem-frame-width frame)))
       (>= y (xwem-frame-y frame))
       (<= y (+ (xwem-frame-y frame) (xwem-frame-width frame)))))

(defun xwem-frame-at (x y)
  "Return frame which contain point at X Y."
  (let ((fl xwem-frames-list))
    (while (and fl (not (xwem-frame-xy-in-p x y (car fl))))
      (setq fl (cdr fl)))
    (car fl)))

;;;###autoload
(defun xwem-frame-set-pos (frame new-x new-y)
  "Set FRAME position at NEW-X and NEW-Y."

  (setf (xwem-frame-x frame) new-x)
  (setf (xwem-frame-y frame) new-y)

  (XMoveWindow (xwem-dpy) (xwem-frame-xwin frame) new-x new-y))
  
;;;###autoload
(defun xwem-frame-set-size (frame new-width new-height)
  "Resize FRAME to NEW-WIDTH and NEW-HEIGHT."

  (setf (xwem-frame-width frame) new-width)
  (setf (xwem-frame-height frame) new-height)

  (xwem-window-set-pixsize (xwem-frame-rootwin frame)
			   (xwem-frame-width frame) t nil)
  (xwem-window-set-pixsize (xwem-frame-rootwin frame)
			   (- (xwem-frame-height frame)
			      (xwem-frame-get-prop frame 'title-height)) t t)
  (XResizeWindow (xwem-dpy) (xwem-frame-xwin frame) new-width new-height)

  ;; Also resize tabber
  (XResizeWindow (xwem-dpy) (xwem-tabber-xwin (xwem-frame-tabber frame))
		 (xwem-frame-width frame)
		 (xwem-frame-get-prop frame 'title-height))

  (xwem-tabber-safe-regeom (xwem-frame-tabber frame) t)
  )

;;; Frame Events handling
(defvar xwem-frame-exposes-counter 0 "xwem-frame exposes counter.")

(defun xwem-frame-hexpose (frame xev)
  "Expose event handler."
  (X-Dpy-log (xwem-dpy) "xwem-frame-expose: Exposure event count: %S\n"
	     '(X-Event-xexpose-count xev))

  (let ((cnt (X-Event-xexpose-count xev))) ; exposures counter

    (if (> xwem-frame-exposes-counter 0)
	;; frame already exposed, and we flush other expose events
	;; according to counter.
	(setq xwem-frame-exposes-counter (1- xwem-frame-exposes-counter))
      
      (setq xwem-frame-exposes-counter cnt)
      ;; It may be case(when frame is not founded) when frame already
      ;; removed from `xwem-frames-list' but window is not destroed yet.
      (when (xwem-frame-p frame)
	(xwem-frame-draw frame nil)))
    ))

(defun xwem-frame-hfocus-in (frame xev)
  "FRAME received FocusIn x event XEV."
  ;; TODO:
  ;;   * More acurate FocusIn handiling
  ;;   * Take in account embedded frames
  (X-Dpy-log (xwem-dpy) "!!!!!!!!!!!!!+++++++++!!!!!!!!!!!!!!!!!!  [%d]     FRAME FOCUS IN: mode=%S, detail=%S\n"
	     '(xwem-frame-num frame)
	     '(X-Event-xfocus-mode xev) '(X-Event-detail xev))

  (when (and (member (X-Event-xfocus-mode xev) (list X-NotifyNormal X-NotifyWhileGrabbed))
	     (member (X-Event-detail xev) (list X-NotifyNonlinearVirtual X-NotifyNonlinear)))

    ;; * Focus moves from client in other frame to client in FRAME.
    ;; * Or Focus moves from normal frame to embedded frame
    (xwem-tabber-draw (xwem-frame-tabber frame))
    (xwem-frame-draw frame nil)
    ))

(defun xwem-frame-hfocus-out (frame xev)
  "FocusOut event XEV."
  ;;   * More acurate FocusOut handiling
  ;;   * Take in account embedded frames
  (X-Dpy-log (xwem-dpy) "!!!!!!!!!!!!!----------------------!!!!!!!!!!!!!!!!!!  [%d]     FRAME FOCUS OUT: mode=%S, detail=%S\n"
	     '(xwem-frame-num frame)
	     '(X-Event-xfocus-mode xev) '(X-Event-detail xev))

  (when (and (member (X-Event-xfocus-mode xev) (list X-NotifyNormal X-NotifyWhileGrabbed))
	     (member (X-Event-detail xev) (list X-NotifyNonlinearVirtual X-NotifyNonlinear)))

    ;; * Focus moves from client in FRAME to client in other frame.
    ;; * Or Focus moves from embedded frame to normal frame.
;    (when (eq frame (xwem-frame-selected))
;      (setq xwem-current-frame nil))

    (xwem-tabber-draw (xwem-frame-tabber frame))
    (xwem-frame-draw frame nil)))

(defun xwem-frame-hdestroy (frame xev)
  "FRAME have got DestroyNotify event XEV."
  (let ((oframe (xwem-frame-other frame 'any))) ; other frame

    ;; Remove FRAME from linkage if any
    (xwem-frame-link-remove frame)

    ;; Now Remove FRAME from frame list
    (setq xwem-frames-list (delete frame xwem-frames-list))

    ;; If frame is not selected it mean that it was embedded
    (when (xwem-frame-p oframe)
      (xwem-frame-select oframe))
    ))

(defun xwem-frame-hconfigure (frame xev)
  "FRAME just received ConfigureNotify event XEV."
  (let ((owid (xwem-frame-width frame))
	(ohei (xwem-frame-height frame))
	(nwid (X-Event-xconfigure-width xev)) ;new width
	(nhei (X-Event-xconfigure-height xev)) ;new height
	rwwid rwhei)

    (when (not (= owid nwid))
      (setf (xwem-frame-width frame) nwid)
      (setq rwwid nwid)
      (xwem-window-set-pixsize (xwem-frame-rootwin frame) rwwid t nil))

    (when (not (= ohei nhei))
      (setf (xwem-frame-height frame) nhei)
      (setq rwhei (- nhei (xwem-frame-get-prop frame 'title-height)))
      (xwem-window-set-pixsize (xwem-frame-rootwin frame) rwhei t t))
    ))
  
(defun xwem-frame-hcirculate (frame xev)
  "Handle CirculateRequest."
  )

(defun xwem-frame-hkeybutton (frame xev)
  "On FRAME handle KeyPress, ButtonPress or ButtonRelease event XEV."
  (when (eq (xwem-kbd-current-map) xwem-global-map)
    (xwem-kbd-set-current-prefix-keymap xwem-frame-keymap))

  (xwem-kbd-handle-keybutton xev))

(defun xwem-frame-events-handler (xdpy win xev)
  "Event handler for frame."
  (X-Dpy-log (xwem-dpy) "XWEM-FRAME-EVENTS-HANDLER: ev=%S, win=%S\n"
	     '(X-Event-name xev) '(X-Win-id win))

  (let ((frame (xwem-frame-find 'xwin win)))

    (when (xwem-frame-mapped-p frame)
      (X-Event-CASE xev
	(:X-Expose
	 (xwem-frame-hexpose frame xev))

	(:X-FocusIn
	 (xwem-frame-hfocus-in frame xev))

	(:X-FocusOut
	 (xwem-frame-hfocus-out frame xev))

	(:X-DestroyNotify
	 ;; Somebody kill us, or one of clients die
	 (setq frame (xwem-frame-find 'xwin (X-Event-xdestroywindow-window xev)))
	 (when (xwem-frame-p frame)
	   (xwem-frame-hdestroy frame xev))
	 )

	(:X-ConfigureNotify
	 ;; Seems that we are embedded frame
	 (setq frame (xwem-frame-find 'xwin (X-Event-xconfigure-window xev)))
	 (when (xwem-frame-p frame)
	   (xwem-frame-hconfigure frame xev)))

	((:X-KeyPress :X-ButtonPress :X-ButtonRelease)
	 (xwem-frame-hkeybutton frame xev))

        (:X-CirculateRequest
         (xwem-frame-hcirculate frame xev))

        ))))

;;;; Frame Events handling ends here

;;;###autoload
(defun xwem-frame-redraw (frame)
  "Redraw FRAMEs windows outlines."
  (let* ((sw-gc (xwem-face-get-gc
                 (if (xwem-frame-selected-p frame)
                     'xwem-face-frame-selected-win-nonselected
                   'xwem-face-frame-nonselected-win-nonselected)))
         (cw-gc (xwem-face-get-gc
                 (if (xwem-frame-selected-p frame)
                     'xwem-face-frame-selected-win-selected
                   'xwem-face-frame-nonselected-win-selected))))

    (xwem-win-map
     (lambda (win)
       (let* ((cgc (if (xwem-win-selected-p win frame) cw-gc sw-gc))
              (hthi (X-Gc-line-width cgc)))

         (unless (numberp hthi)
	   (setq hthi 1))
	 
;	 (X-Dpy-log (xwem-dpy) "Get cgc=%s hthi=%d\n" 'cgc 'hthi)
	 ;; XXX is Clearing window area is really needed?
	 (XClearArea (xwem-dpy) (xwem-frame-xwin (xwem-win-frame win))
		     (+ (xwem-win-x win) hthi)
		     (+ (xwem-win-y win) hthi)
		     (- (xwem-win-width win) hthi)
		     (- (xwem-win-height win) hthi)
		     nil)

	 (XDrawRectangle (xwem-dpy)
			 (xwem-frame-xwin frame)
			 cgc
			 (+ (xwem-win-x win) (/ hthi 2))
			 (+ (xwem-win-y win) (/ hthi 2))
			 (- (xwem-win-width win) hthi)
			 (- (xwem-win-height win) hthi))))

     (xwem-frame-selwin frame))

    ;; Draw delimetrs (ARGUSED!)
;    (xwem-win-draw-delims (xwem-frame-rootwin frame))
    ))

(defun xwem-frame-draw (frame full)
  "Draw FRAME. If FULL is t then fully redraw it, i.e. ClearWindow first."
  (let ((win (xwem-frame-xwin frame)))
    (X-Dpy-send-excursion (xwem-dpy)
      (when full
	(XClearArea (xwem-dpy) win 0 0
		    (xwem-frame-width frame)
		    (xwem-frame-height frame) nil))

      ;; Outile windows
      (xwem-frame-redraw frame)

      ;; Delims
      (xwem-win-draw-delims (xwem-frame-rootwin frame))
      )))

(define-xwem-command xwem-frame-lower (frame)
  "Lower FRAME's window."
  (xwem-interactive (list (xwem-frame-selected)))

  (XLowerWindow (xwem-dpy) (xwem-frame-xwin frame)))

(define-xwem-command xwem-frame-raise (frame)
  "Raise FRAME's window."
  (xwem-interactive (list (xwem-frame-selected)))

  (xwem-frame-map frame)
  (XRaiseWindow (xwem-dpy) (xwem-frame-xwin frame))
  )

(define-xwem-command xwem-frame-next (arg)
  "Switch to ARG next frame."
  (xwem-interactive "p")

  (let ((frame (nth arg (member (xwem-frame-selected)
                               xwem-frames-list))))
    
    (when (and xwem-frame-rolling-switch
              (not (xwem-frame-p frame)))
      ;; Assume first frame if there no next
      (setq frame (car xwem-frames-list)))

    (if (xwem-frame-p frame)
       (xwem-frame-select frame)

      (xwem-message 'warn "Can't switch to `%S' frame" frame))))

(define-xwem-command xwem-frame-previous (arg)
  "Switch to ARG previous frame."
  (xwem-interactive "p")

  (let ((frame (nth arg (member (xwem-frame-selected)
                               (reverse xwem-frames-list)))))

    (when (and xwem-frame-rolling-switch
              (not (xwem-frame-p frame)))
      ;; Assume last frame if there no previous
      (setq frame (car (last xwem-frames-list))))

    (if (xwem-frame-p frame)
       (xwem-frame-select frame)

      (xwem-message 'warn "Can't switch to `%S' frame" frame))))

(define-xwem-command xwem-frame-switch-nth (arg)
  "Switch xwem frame.
If ARG is numeric prefix, then switch to ARG frame.
If ARG ommited, 0 as ARG value will be used.
If ARG is list and selected frame is embedded, than unembedd it."
  (xwem-interactive "P")

  (when (null arg)
    (setq arg 0))
  (if (numberp arg)
      (let ((frame (nth (abs arg) xwem-frames-list)))
	(if (xwem-frame-p frame)
	    (xwem-frame-select frame)
	  (xwem-message 'warn "No such %S frame." (abs arg))))

    ;; TODO: unembed selected frame
    (let ((frame (xwem-frame-selected)))
      (when (xwem-frame-embedded-p frame)
	(let* ((cl (xwem-find-client (xwem-frame-xwin frame)))
	       (rtgeom (xwem-rootgeom))
	       (nwi (X-Geom-width rtgeom))
	       (nhe (X-Geom-height rtgeom)))

	  (setf (xwem-frame-embedded-p frame) nil)

	  (setq nhe (- nhe
		       (if (xwem-minib-frame xwem-minibuffer)
			   (frame-pixel-height (xwem-minib-frame xwem-minibuffer))
			 0)))		;XXX frame's height calculation
	  (xwem-manda-fun-run (xwem-cl-manda cl) 'demanage cl t)
	  (setf (xwem-cl-win cl) nil)
	  (setf (xwem-frame-width frame) nwi)
	  (setf (xwem-frame-height frame) nhe)
;	(xwem-window-set-pixsize (xwem-frame-rootwin frame) nwi t nil)
;	(xwem-window-set-pixsize (xwem-frame-rootwin frame) nhe t t)
	  (XResizeWindow (xwem-dpy) (xwem-frame-xwin frame) nwi nhe)
	  (XReparentWindow (xwem-dpy) (xwem-frame-xwin frame) (xwem-rootwin) 0 0)
	  (xwem-frame-select frame t)
	  )))
    ))

(define-xwem-command xwem-frame-switch-nth-linkage (arg)
  "Raise all frames that in linkage of frame with number NUM."
  (xwem-interactive "P")

  (when (null arg) (setq arg 0))
  (if (numberp arg)
      (let ((frame (nth (abs arg) xwem-frames-list)))
	(if (not (xwem-frame-p frame))
	  (xwem-message 'warn "No such %S frame." (abs arg))

	  ;; Select linkage
	  (xwem-frame-linkage-map
	   frame
	   (lambda (fr)
	     (xwem-frame-raise fr)))
	  (xwem-frame-select frame)))
    (xwem-message 'warn "Strange arg value: %S" arg))
  )

(define-xwem-command xwem-frame-destroy (frame)
  "Destroy FRAME. If FRAME is not given selected frame assumed."
  (xwem-interactive (list (xwem-frame-selected)))

  ;; Desetup all clients
  (let ((xwem-cl-manage-hook nil)
	(xwem-cl-demanage-hook nil))
    
    (XSelectInput (xwem-dpy) (xwem-frame-xwin frame) 0)
    (setf (xwem-frame-state frame) 'destroed)

    ;; Em
    (xwem-frame-hdestroy frame nil)

    (xwem-win-map