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path: root/beryl-plugins/src/place.c
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/*
 * Copyright (C) 2001 Havoc Pennington
 * Copyright (C) 2002, 2003 Red Hat, Inc.
 * Copyright (C) 2003 Rob Adams
 * Copyright (C) 2005 Novell, Inc.
 *
 * This program 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 of the
 * License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <math.h>
#include <stdlib.h>
#include <string.h>

#include <beryl.h>

#include <glib.h>

#define PLACE_WORKAROUND_DEFAULT TRUE
#define RECTANGLE_FROM_WINDOW(w) {w->attrib.x,w->attrib.y,w->attrib.width,w->attrib.height}

static int displayPrivateIndex;

typedef struct _PlaceDisplay {
	int screenPrivateIndex;
	//    HandleEventProc handleEvent;
} PlaceDisplay;

#define PLACE_SCREEN_OPTION_WORKAROUND      0
#define PLACE_SCREEN_OPTION_MODE 	    1
#define PLACE_SCREEN_OPTION_NUM             2

typedef struct _PlaceScreen {
	CompOption opt[PLACE_SCREEN_OPTION_NUM];

	DamageWindowRectProc damageWindowRect;
	int placeMode;
} PlaceScreen;

typedef enum _PlaceMode{
	PlaceModeCascade,
	PlaceModeCentered,
	PlaceModeRandom,
	PlaceModeIntelligent,
	} PlaceMode;

char *placeModes[] = { N_("Cascade"),N_("Centered"),N_("Random"),N_("Intelligent") };

#define PLACE_MODE_DEFAULT PlaceModeCascade
#define NUM_PLACE_MODES 4

#define GET_PLACE_DISPLAY(d)				      \
    ((PlaceDisplay *) (d)->privates[displayPrivateIndex].ptr)

#define PLACE_DISPLAY(d)		     \
    PlaceDisplay *pd = GET_PLACE_DISPLAY (d)

#define GET_PLACE_SCREEN(s, pd)					  \
    ((PlaceScreen *) (s)->privates[(pd)->screenPrivateIndex].ptr)

#define PLACE_SCREEN(s)							   \
    PlaceScreen *ps = GET_PLACE_SCREEN (s, GET_PLACE_DISPLAY (s->display))

#define NUM_OPTIONS(s) (sizeof ((s)->opt) / sizeof (CompOption))

static Bool
placeSetScreenOption(CompScreen * screen,
		     char *name, CompOptionValue * value)
{
	CompOption *o;
	int index;

	PLACE_SCREEN(screen);

	o = compFindOption(ps->opt, NUM_OPTIONS(ps), name, &index);
	if (!o)
		return FALSE;

	switch (index) {
	case PLACE_SCREEN_OPTION_WORKAROUND:
		if (compSetBoolOption(o, value))
			return TRUE;
		/*case PLACE_SCREEN_OPTION_CENTER_INITIATE:
		   if (addScreenBinding (screen, &value->bind))
		   {
		   removeScreenBinding (screen, &o->value.bind);

		   if (compSetBindingOption (o, value))
		   return TRUE;
		   } */
		break;
	case PLACE_SCREEN_OPTION_MODE:
		if (compSetStringOption (o,value))
		{
			int i;
			for (i = 0; i < NUM_PLACE_MODES; i++)
				if (strcmp (placeModes[i], o->value.s)==0)
					ps->placeMode = (PlaceMode) i;
		}
	default:
		break;
	}

	return FALSE;
}

static void placeScreenInitOptions(PlaceScreen * ps)
{
	CompOption *o;

	o = &ps->opt[PLACE_SCREEN_OPTION_WORKAROUND];
	o->name = "workarounds";
	o->group = N_("");
	o->subGroup = N_("");
	o->displayHints = "";
	o->shortDesc = N_("Workarounds");
	o->longDesc = N_("Window placement workarounds");
	o->type = CompOptionTypeBool;
	o->value.b = PLACE_WORKAROUND_DEFAULT;
	
	o = &ps->opt[PLACE_SCREEN_OPTION_MODE];
	o->name = "place_mode";
	o->shortDesc = N_("Placement Mode");
	o->longDesc = N_("Cascade, Random or Centered");
	o->type = CompOptionTypeString;
	o->value.s = strdup (placeModes[PLACE_MODE_DEFAULT]);
	o->rest.s.string = placeModes;
	o->rest.s.nString = NUM_PLACE_MODES;

	o = &ps->opt[PLACE_SCREEN_OPTION_MODE];
	o->name = "place_mode";
	o->group = N_("");
	o->subGroup = N_("");
	o->displayHints = "";
	o->shortDesc = N_("Placement Mode");
	o->longDesc = N_("Window placement technique");
	o->type = CompOptionTypeString;
	o->value.s = strdup(placeModes[PLACE_MODE_DEFAULT]);
	o->rest.s.string = placeModes;
	o->rest.s.nString = NUM_PLACE_MODES;
	
}

static CompOption *placeGetScreenOptions(CompScreen * screen, int *count)
{
	if (screen) {
		PLACE_SCREEN(screen);

		*count = NUM_OPTIONS(ps);
		return ps->opt;
	} else {
		PlaceScreen *ps = malloc(sizeof(PlaceScreen));
		placeScreenInitOptions(ps);
		*count = NUM_OPTIONS(ps);
		return ps->opt;
	}
}


typedef enum {
	PlaceLeft,
	PlaceRight,
	PlaceTop,
	PlaceBottom
} PlaceWindowDirection;

static Bool
rectangleIntersect(XRectangle * src1, XRectangle * src2, XRectangle * dest)
{
	int dest_x, dest_y;
	int dest_w, dest_h;
	int return_val;

	g_return_val_if_fail(src1 != NULL, FALSE);
	g_return_val_if_fail(src2 != NULL, FALSE);
	g_return_val_if_fail(dest != NULL, FALSE);

	return_val = FALSE;

	dest_x = MAX(src1->x, src2->x);
	dest_y = MAX(src1->y, src2->y);
	dest_w =
	    MIN(src1->x + src1->width, src2->x + src2->width) - dest_x;
	dest_h =
	    MIN(src1->y + src1->height, src2->y + src2->height) - dest_y;

	if (dest_w > 0 && dest_h > 0) {
		dest->x = dest_x;
		dest->y = dest_y;
		dest->width = dest_w;
		dest->height = dest_h;
		return_val = TRUE;
	} else {
		dest->width = 0;
		dest->height = 0;
	}

	return return_val;
}

static gint northwestcmp(gconstpointer a, gconstpointer b)
{
	CompWindow *aw = (gpointer) a;
	CompWindow *bw = (gpointer) b;
	int from_origin_a;
	int from_origin_b;
	int ax, ay, bx, by;

	ax = aw->attrib.x - aw->input.left;
	ay = aw->attrib.y - aw->input.top;

	bx = bw->attrib.x - bw->input.left;
	by = bw->attrib.y - bw->input.top;

	/* probably there's a fast good-enough-guess we could use here. */
	from_origin_a = sqrt(ax * ax + ay * ay);
	from_origin_b = sqrt(bx * bx + by * by);

	if (from_origin_a < from_origin_b)
		return -1;
	else if (from_origin_a > from_origin_b)
		return 1;
	else
		return 0;
}


static void
get_workarea_of_current_output_device(CompScreen * s, XRectangle * area)
{
	int head;

	head = screenGetCurrentOutputDev(s);
	screenGetOutputDevWorkArea(s, head, area);
}

static int get_window_width(CompWindow * window)
{
	return window->serverWidth + window->serverBorderWidth * 2;
}

static int get_window_height(CompWindow * window)
{
	return window->serverHeight + window->serverBorderWidth * 2;
}

static void placeCentered(CompWindow *window, int *x, int *y){
	*x = window->screen->workArea.x + (window->screen->workArea.width
	- get_window_width(window)) /2;
	*y = window->screen->workArea.y + (window->screen->workArea.height
	- get_window_height(window)) /2;
}



static void placeRandom(CompWindow *window, int *x, int *y){
	*x = rand() % (window->screen->workArea.width - window->screen->workArea.x); 
	*y = rand() % (window->screen->workArea.height - window->screen->workArea.y);
}

static void placeIntelligent(CompWindow *window, int *xo, int *yo){
	int x = 0;
	int y = 0;
	
	XRectangle windowRec = RECTANGLE_FROM_WINDOW(window);
	
	Bool overlaps = FALSE;	
	for (x = 0; x < window->screen->workArea.width; x+=(get_window_height(window))/10){
		overlaps=FALSE;
		for (y = 0; y < window->screen->workArea.height;y+=(get_window_width(window))/10){
			CompScreen *l=window->screen->windows;
			while (l){
					XRectangle dest;
					XRectangle temp = RECTANGLE_FROM_WINDOW(l);
					if (rectangleIntersect(&windowRec,&temp,&dest)){
							overlaps=TRUE;
					}
					
						
				}
			
			
			}
				if (overlaps) {break;}
		}
		*xo=300; *yo=300;
	}
	


static void
find_next_cascade(CompWindow * window,
		  GList * windows, int x, int y, int *new_x, int *new_y)
{
	GList *tmp;
	GList *sorted;
	int cascade_x, cascade_y;
	int x_threshold, y_threshold;
	int window_width, window_height;
	int cascade_stage;
	XRectangle work_area;

	sorted = g_list_copy(windows);
	sorted = g_list_sort(sorted, northwestcmp);

	/* This is a "fuzzy" cascade algorithm.
	 * For each window in the list, we find where we'd cascade a
	 * new window after it. If a window is already nearly at that
	 * position, we move on.
	 */

	/* arbitrary-ish threshold, honors user attempts to
	 * manually cascade.
	 */
#define CASCADE_FUZZ 15

	x_threshold = MAX(window->input.left, CASCADE_FUZZ);
	y_threshold = MAX(window->input.top, CASCADE_FUZZ);

	/* Find furthest-SE origin of all workspaces.
	 * cascade_x, cascade_y are the target position
	 * of NW corner of window frame.
	 */

	get_workarea_of_current_output_device(window->screen, &work_area);

	cascade_x = MAX(0, work_area.x);
	cascade_y = MAX(0, work_area.y);

	/* Find first cascade position that's not used. */

	window_width = get_window_width(window) + window->input.left +
	    window->input.right;
	window_height = get_window_height(window) + window->input.top +
	    window->input.bottom;

	cascade_stage = 0;
	tmp = sorted;
	while (tmp != NULL) {
		CompWindow *w;
		int wx, wy;

		w = tmp->data;

		/* we want frame position, not window position */
		wx = w->attrib.x - w->input.left;
		wy = w->attrib.y - w->input.top;

		if (ABS(wx - cascade_x) < x_threshold &&
		    ABS(wy - cascade_y) < y_threshold) {
			/* This window is "in the way", move to next cascade
			 * point. The new window frame should go at the origin
			 * of the client window we're stacking above.
			 */
			wx = w->attrib.x;
			wy = w->attrib.y;

			cascade_x = wx;
			cascade_y = wy;

			/* If we go off the screen, start over with a new cascade */
			if (((cascade_x + window_width) >
			     (work_area.x + work_area.width)) ||
			    ((cascade_y + window_height) >
			     (work_area.y + work_area.height))) {
				cascade_x = MAX(0, work_area.x);
				cascade_y = MAX(0, work_area.y);

#define CASCADE_INTERVAL 50	/* space between top-left corners of cascades */

				cascade_stage += 1;
				cascade_x +=
				    CASCADE_INTERVAL * cascade_stage;

				/* start over with a new cascade translated to the right,
				 * unless we are out of space
				 */
				if ((cascade_x + window_width) <
				    (work_area.x + work_area.width)) {
					tmp = sorted;
					continue;
				} else {
					/* All out of space, this cascade_x won't work */
					cascade_x = MAX(0, work_area.x);
					break;
				}
			}
		} else {
			/* Keep searching for a further-down-the-diagonal window. */
		}

		tmp = tmp->next;
	}

	/* cascade_x and cascade_y will match the last window in the list
	 * that was "in the way" (in the approximate cascade diagonal)
	 */

	g_list_free(sorted);

	/* Convert coords to position of window, not position of frame. */
	*new_x = cascade_x + window->input.left;
	*new_y = cascade_y + window->input.top;
}

static void
find_most_freespace(CompWindow * window,
		    CompWindow * focus_window,
		    int x, int y, int *new_x, int *new_y)
{
	PlaceWindowDirection side;
	int max_area;
	int max_width, max_height, left, right, top, bottom;
	int left_space, right_space, top_space, bottom_space;
	int frame_size_left, frame_size_top;
	XRectangle work_area;
	XRectangle avoid;
	XRectangle outer;

	frame_size_left = window->input.left;
	frame_size_top = window->input.top;

	get_workarea_of_current_output_device(window->screen, &work_area);

	getOuterRectOfWindow(focus_window, &avoid);
	getOuterRectOfWindow(window, &outer);

	/* Find the areas of choosing the various sides of the focus window */
	max_width = MIN(avoid.width, outer.width);
	max_height = MIN(avoid.height, outer.height);
	left_space = avoid.x - work_area.x;
	right_space =
	    work_area.width - (avoid.x + avoid.width - work_area.x);
	top_space = avoid.y - work_area.y;
	bottom_space =
	    work_area.height - (avoid.y + avoid.height - work_area.y);
	left = MIN(left_space, outer.width);
	right = MIN(right_space, outer.width);
	top = MIN(top_space, outer.height);
	bottom = MIN(bottom_space, outer.height);

	/* Find out which side of the focus_window can show the most of the
	 * window
	 */
	side = PlaceLeft;
	max_area = left * max_height;
	if (right * max_height > max_area) {
		side = PlaceRight;
		max_area = right * max_height;
	}
	if (top * max_width > max_area) {
		side = PlaceTop;
		max_area = top * max_width;
	}
	if (bottom * max_width > max_area) {
		side = PlaceBottom;
		max_area = bottom * max_width;
	}

	/* Give up if there's no where to put it
	 * (i.e. focus window is maximized)
	 */
	if (max_area == 0)
		return;

	/* Place the window on the relevant side; if the whole window fits,
	 * make it adjacent to the focus window; if not, make sure the
	 * window doesn't go off the edge of the screen.
	 */
	switch (side) {
	case PlaceLeft:
		*new_y = avoid.y + frame_size_top;
		if (left_space > outer.width)
			*new_x = avoid.x - outer.width + frame_size_left;
		else
			*new_x = work_area.x + frame_size_left;
		break;
	case PlaceRight:
		*new_y = avoid.y + frame_size_top;
		if (right_space > outer.width)
			*new_x = avoid.x + avoid.width + frame_size_left;
		else
			*new_x =
			    work_area.x + work_area.width - outer.width +
			    frame_size_left;
		break;
	case PlaceTop:
		*new_x = avoid.x + frame_size_left;
		if (top_space > outer.height)
			*new_y = avoid.y - outer.height + frame_size_top;
		else
			*new_y = work_area.y + frame_size_top;
		break;
	case PlaceBottom:
		*new_x = avoid.x + frame_size_left;
		if (bottom_space > outer.height)
			*new_y = avoid.y + avoid.height + frame_size_top;
		else
			*new_y =
			    work_area.y + work_area.height - outer.height +
			    frame_size_top;
		break;
	}
}


static void
avoid_being_obscured_as_second_modal_dialog(CompWindow * window,
					    int *x, int *y)
{
	/* We can't center this dialog if it was denied focus and it
	 * overlaps with the focus window and this dialog is modal and this
	 * dialog is in the same app as the focus window (*phew*...please
	 * don't make me say that ten times fast). See bug 307875 comment 11
	 * and 12 for details, but basically it means this is probably a
	 * second modal dialog for some app while the focus window is the
	 * first modal dialog.  We should probably make them simultaneously
	 * visible in general, but it becomes mandatory to do so due to
	 * buggy apps (e.g. those using gtk+ *sigh*) because in those cases
	 * this second modal dialog also happens to be modal to the first
	 * dialog in addition to the main window, while it has only let us
	 * know about the modal-to-the-main-window part.
	 */

	CompWindow *focus_window;

	focus_window =
	    findWindowAtDisplay(window->screen->display,
				window->screen->display->activeWindow);

	if (focus_window && (window->state & CompWindowStateModalMask) && 0	/* window->denied_focus_and_not_transient        &&
										   window_same_application (window, focus_window) &&
										   window_intersect (window, focus_window) */
	    ) {
		find_most_freespace(window, focus_window, *x, *y, x, y);
	}
}

static gboolean
rectangle_overlaps_some_window(XRectangle * rect, GList * windows)
{
	GList *tmp;
	XRectangle dest;

	tmp = windows;
	while (tmp != NULL) {
		CompWindow *other = tmp->data;
		XRectangle other_rect;

		switch (other->type) {
		case CompWindowTypeDockMask:
		case CompWindowTypeSplashMask:
		case CompWindowTypeDesktopMask:
		case CompWindowTypeDialogMask:
		case CompWindowTypeModalDialogMask:
		case CompWindowTypeFullscreenMask:
		case CompWindowTypeUnknownMask:
			break;
		case CompWindowTypeNormalMask:
		case CompWindowTypeUtilMask:
		case CompWindowTypeToolbarMask:
		case CompWindowTypeMenuMask:
			getOuterRectOfWindow(other, &other_rect);

			if (rectangleIntersect(rect, &other_rect, &dest))
				return TRUE;
			break;
		}

		tmp = tmp->next;
	}

	return FALSE;
}

static gint leftmost_cmp(gconstpointer a, gconstpointer b)
{
	CompWindow *aw = (gpointer) a;
	CompWindow *bw = (gpointer) b;
	int ax, bx;

	ax = aw->attrib.x - aw->input.left;
	bx = bw->attrib.x - bw->input.left;

	if (ax < bx)
		return -1;
	else if (ax > bx)
		return 1;
	else
		return 0;
}

static gint topmost_cmp(gconstpointer a, gconstpointer b)
{
	CompWindow *aw = (gpointer) a;
	CompWindow *bw = (gpointer) b;
	int ay, by;

	ay = aw->attrib.y - aw->input.top;
	by = bw->attrib.y - bw->input.top;

	if (ay < by)
		return -1;
	else if (ay > by)
		return 1;
	else
		return 0;
}

static void
center_tile_rect_in_area(XRectangle * rect, XRectangle * work_area)
{
	int fluff;

	/* The point here is to tile a window such that "extra"
	 * space is equal on either side (i.e. so a full screen
	 * of windows tiled this way would center the windows
	 * as a group)
	 */

	fluff = (work_area->width % (rect->width + 1)) / 2;
	rect->x = work_area->x + fluff;
	fluff = (work_area->height % (rect->height + 1)) / 3;
	rect->y = work_area->y + fluff;
}

static gboolean
rect_fits_in_work_area(XRectangle * work_area, XRectangle * rect)
{
	return ((rect->x >= work_area->x) &&
		(rect->y >= work_area->y) &&
		(rect->x + rect->width <= work_area->x + work_area->width)
		&& (rect->y + rect->height <=
		    work_area->y + work_area->height));
}

/* Find the leftmost, then topmost, empty area on the workspace
 * that can contain the new window.
 *
 * Cool feature to have: if we can't fit the current window size,
 * try shrinking the window (within geometry constraints). But
 * beware windows such as Emacs with no sane minimum size, we
 * don't want to create a 1x1 Emacs.
 */
static gboolean
find_first_fit(CompWindow * window,
	       GList * windows, int x, int y, int *new_x, int *new_y)
{
	/* This algorithm is limited - it just brute-force tries
	 * to fit the window in a small number of locations that are aligned
	 * with existing windows. It tries to place the window on
	 * the bottom of each existing window, and then to the right
	 * of each existing window, aligned with the left/top of the
	 * existing window in each of those cases.
	 */
	int retval;
	GList *below_sorted;
	GList *right_sorted;
	GList *tmp;
	XRectangle rect;
	XRectangle work_area;

	retval = FALSE;

	/* Below each window */
	below_sorted = g_list_copy(windows);
	below_sorted = g_list_sort(below_sorted, leftmost_cmp);
	below_sorted = g_list_sort(below_sorted, topmost_cmp);

	/* To the right of each window */
	right_sorted = g_list_copy(windows);
	right_sorted = g_list_sort(right_sorted, topmost_cmp);
	right_sorted = g_list_sort(right_sorted, leftmost_cmp);

	getOuterRectOfWindow(window, &rect);

	get_workarea_of_current_output_device(window->screen, &work_area);

	work_area.x += (window->initialViewportX - window->screen->x) *
	    window->screen->width;
	work_area.y += (window->initialViewportY - window->screen->y) *
	    window->screen->height;

	center_tile_rect_in_area(&rect, &work_area);

	if (rect_fits_in_work_area(&work_area, &rect) &&
	    !rectangle_overlaps_some_window(&rect, windows)) {
		*new_x = rect.x + window->input.left;
		*new_y = rect.y + window->input.top;

		retval = TRUE;

		goto out;
	}

	/* try below each window */
	tmp = below_sorted;
	while (tmp != NULL) {
		CompWindow *w = tmp->data;
		XRectangle outer_rect;

		getOuterRectOfWindow(w, &outer_rect);

		rect.x = outer_rect.x;
		rect.y = outer_rect.y + outer_rect.height;

		if (rect_fits_in_work_area(&work_area, &rect) &&
		    !rectangle_overlaps_some_window(&rect, below_sorted)) {
			*new_x = rect.x + window->input.left;
			*new_y = rect.y + window->input.top;

			retval = TRUE;

			goto out;
		}

		tmp = tmp->next;
	}

	/* try to the right of each window */
	tmp = right_sorted;
	while (tmp != NULL) {
		CompWindow *w = tmp->data;
		XRectangle outer_rect;

		getOuterRectOfWindow(w, &outer_rect);

		rect.x = outer_rect.x + outer_rect.width;
		rect.y = outer_rect.y;

		if (rect_fits_in_work_area(&work_area, &rect) &&
		    !rectangle_overlaps_some_window(&rect, right_sorted)) {
			*new_x = rect.x + window->input.left;
			*new_y = rect.y + window->input.top;

			retval = TRUE;

			goto out;
		}

		tmp = tmp->next;
	}

      out:
	g_list_free(below_sorted);
	g_list_free(right_sorted);

	return retval;
}

/*static void
  placeCenterWindow (CompWindow *w)
  {
  int dx, dy;

  dx = ((w->screen->width  - w->width)  / 2) - w->attrib.x;
  dy = ((w->screen->height - w->height) / 2) - w->attrib.y;

  moveWindow (w, dx, dy, TRUE, FALSE);
  syncWindowPosition (w);
  }*/

static void
placeWindow(CompWindow * window, int x, int y, int *new_x, int *new_y)
{
	CompWindow *wi;
	GList *windows;
	XRectangle work_area;
	int x0 = (window->initialViewportX - window->screen->x) *
	    window->screen->width;
	int y0 = (window->initialViewportY - window->screen->y) *
	    window->screen->height;
	int window_width, window_height;

	PLACE_SCREEN(window->screen);

	window_width = get_window_width(window);
	window_height = get_window_height(window);

	get_workarea_of_current_output_device(window->screen, &work_area);

	work_area.x += x0;
	work_area.y += y0;

	windows = NULL;

	switch (window->type) {
	case CompWindowTypeSplashMask:
	case CompWindowTypeDialogMask:
	case CompWindowTypeModalDialogMask:
	case CompWindowTypeNormalMask:
		/* Run placement algorithm on these. */
		break;
	case CompWindowTypeDockMask:
	case CompWindowTypeDesktopMask:
	case CompWindowTypeUtilMask:
	case CompWindowTypeToolbarMask:
	case CompWindowTypeMenuMask:
	case CompWindowTypeFullscreenMask:
	case CompWindowTypeUnknownMask:
		/* Assume the app knows best how to place these, no placement
		 * algorithm ever (other than "leave them as-is")
		 */
		goto done_no_constraints;
		break;
	}

	/* don't run placement algorithm on windows that can't be moved */
	if (!(window->actions & CompWindowActionMoveMask)) {
		goto done_no_constraints;
	}

	if (window->type & CompWindowTypeFullscreenMask) {
		x = x0;
		y = y0;
		goto done_no_constraints;
	}

	if (window->state & (CompWindowStateMaximizedVertMask |
			     CompWindowStateMaximizedHorzMask)) {
		if (window->screen->nOutputDev == 1) {
			if (window->
			    state & CompWindowStateMaximizedVertMask)
				y = work_area.y + window->input.top;

			if (window->
			    state & CompWindowStateMaximizedHorzMask)
				x = work_area.x + window->input.left;
		} else {
			int head = screenGetOutputDevForWindow(window);
			XRectangle workArea;

			screenGetOutputDevWorkArea(window->screen, head,
						   &workArea);

			if (window->
			    state & CompWindowStateMaximizedVertMask)
				y = workArea.y + window->input.top;

			if (window->
			    state & CompWindowStateMaximizedHorzMask)
				x = workArea.x + window->input.left;
		}

		goto done;
	}

	if (ps->opt[PLACE_SCREEN_OPTION_WORKAROUND].value.b) {
		/* workarounds enabled */

		if ((window->sizeHints.flags & PPosition) ||
		    (window->sizeHints.flags & USPosition)) {
			avoid_being_obscured_as_second_modal_dialog(window,
								    &x,
								    &y);
			goto done;
		}
	} else {
		switch (window->type) {
		case CompWindowTypeNormalMask:
			/* Only accept USPosition on normal windows because the app is full
			 * of shit claiming the user set -geometry for a dialog or dock
			 */
			if (window->sizeHints.flags & USPosition) {
				/* don't constrain with placement algorithm */
				goto done;
			}
			break;
		case CompWindowTypeSplashMask:
		case CompWindowTypeDialogMask:
		case CompWindowTypeModalDialogMask:
			/* Ignore even USPosition on dialogs, splashscreen */
			break;
		case CompWindowTypeDockMask:
		case CompWindowTypeDesktopMask:
		case CompWindowTypeUtilMask:
		case CompWindowTypeToolbarMask:
		case CompWindowTypeMenuMask:
		case CompWindowTypeFullscreenMask:
		case CompWindowTypeUnknownMask:
			/* Assume the app knows best how to place these. */
			if (window->sizeHints.flags & PPosition) {
				goto done_no_constraints;
			}
			break;
		}
	}

	if ((window->type == CompWindowTypeDialogMask ||
	     window->type == CompWindowTypeModalDialogMask) &&
	    window->transientFor != None) {
		/* Center horizontally, at top of parent vertically */

		CompWindow *parent;

		parent = findWindowAtDisplay(window->screen->display,
					     window->transientFor);
		if (parent) {
			int w;

			x = parent->attrib.x;
			y = parent->attrib.y;

			w = get_window_width(parent);

			/* center of parent */
			x = x + w / 2;

			/* center of child over center of parent */
			x -= window_width / 2;

			/* "visually" center window over parent, leaving twice as
			 * much space below as on top.
			 */
			y += (get_window_height(parent) -
			      window_height) / 3;

			/* put top of child's frame, not top of child's client */
			y += window->input.top;

			/* clip to screen if parent is visible in current viewport */
			if (parent->attrib.x < parent->screen->width &&
			    parent->attrib.x + parent->screen->width > 0) {
				XRectangle area;

				get_workarea_of_current_output_device
				    (window->screen, &area);

				if (x + window_width > area.x + area.width)
					x = area.x + area.width -
					    window_width;
				if (y + window_height >
				    area.y + area.height)
					y = area.y + area.height -
					    window_height;
				if (x < area.x)
					x = area.x;
				if (y < area.y)
					y = area.y;
			}

			avoid_being_obscured_as_second_modal_dialog(window,
								    &x,
								    &y);

			goto done_no_x_constraints;
		}
	}

	/* FIXME UTILITY with transient set should be stacked up
	 * on the sides of the parent window or something.
	 */
	if (window->type == CompWindowTypeDialogMask ||
	    window->type == CompWindowTypeModalDialogMask ||
	    window->type == CompWindowTypeSplashMask) {
		/* Center on screen */
		int head;
		XRectangle workArea;

		/*      w = window->screen->width;
		   h = window->screen->height;

		   x = (w - window->width) / 2;
		   y = (h - window->height) / 2;
		 */
		head = screenGetCurrentOutputDev(window->screen);
		screenGetOutputDevWorkArea(window->screen, head,
					   &workArea);

		x = (workArea.width - window_width) / 2;
		y = (workArea.height - window_height) / 2;

		goto done_check_denied_focus;
	}

	/* Find windows that matter (not minimized, on same workspace
	 * as placed window, may be shaded - if shaded we pretend it isn't
	 * for placement purposes)
	 */
	for (wi = window->screen->windows; wi; wi = wi->next) {
		if (!wi->shaded && wi->attrib.map_state != IsViewable)
			continue;

		if (wi->attrib.x >= work_area.x + work_area.width ||
		    wi->attrib.x + get_window_width(wi) <= work_area.x ||
		    wi->attrib.y >= work_area.y + work_area.height ||
		    wi->attrib.y + get_window_height(wi) <= work_area.y)
			continue;

		if (wi->attrib.override_redirect)
			continue;

		if (wi->state & (CompWindowTypeDesktopMask |
				 CompWindowTypeDockMask |
				 CompWindowTypeFullscreenMask |
				 CompWindowTypeUnknownMask))
			continue;

		if (wi != window)
			windows = g_list_prepend(windows, wi);
	}

	/* "Origin" placement algorithm */
	x = x0;
	y = y0;

	if (ps->placeMode == PlaceModeCascade){
	if (find_first_fit(window, windows, x, y, &x, &y))
		goto done_check_denied_focus;

	/* if the window wasn't placed at the origin of screen,
	 * cascade it onto the current screen
	 */
	find_next_cascade(window, windows, x, y, &x, &y);
	} else if (ps->placeMode == PlaceModeCentered) {
		placeCentered(window, &x, &y);
	} else if (ps->placeMode == PlaceModeRandom) {
		placeRandom(window, &x, &y);
	} else {
		placeIntelligent(window, &x, &y);
	}

	/* Maximize windows if they are too big for their work area (bit of
	 * a hack here). Assume undecorated windows probably don't intend to
	 * be maximized.
	 *
	 if (window->has_maximize_func &&
	 window->decorated    &&
	 !window->fullscreen)
	 {
	 XRectangle workarea;
	 XRectangle outer;

	 workarea = s->workArea;
	 getOuterRectOfWindow (window, &outer);

	 if (outer.width >= workarea.width &&
	 outer.height >= workarea.height)
	 {
	 window->maximize_after_placement = TRUE;
	 }
	 }
	 */

      done_check_denied_focus:
	/* If the window is being denied focus and isn't a transient of the
	 * focus window, we do NOT want it to overlap with the focus window
	 * if at all possible.  This is guaranteed to only be called if the
	 * focus_window is non-NULL, and we try to avoid that window.
	 */
	if (0 /* window->denied_focus_and_not_transient */ ) {
		gboolean found_fit = FALSE;
		CompWindow *focus_window;

		focus_window =
		    findWindowAtDisplay(window->screen->display,
					window->screen->display->
					activeWindow);
		if (focus_window) {
			XRectangle wr, fwr, overlap;

			getOuterRectOfWindow(window, &wr);
			getOuterRectOfWindow(focus_window, &fwr);

			/* No need to do anything if the window doesn't overlap at all */
			found_fit =
			    !rectangleIntersect(&wr, &fwr, &overlap);

			/* Try to do a first fit again, this time only taking into
			 * account the focus window.
			 */
			if (!found_fit) {
				GList *focus_window_list;

				focus_window_list =
				    g_list_prepend(NULL, focus_window);

				/* Reset x and y ("origin" placement algorithm) */
				x = 0;
				y = 0;

				found_fit =
				    find_first_fit(window,
						   focus_window_list, x, y,
						   &x, &y);

				g_list_free(focus_window_list);
			}
		}

		/* If that still didn't work, just place it where we can see as much
		 * as possible.
		 */
		if (!found_fit)
			find_most_freespace(window, focus_window, x, y, &x,
					    &y);
	}

	g_list_free(windows);

      done:
	if (((x + window_width + window->input.right < work_area.x +
	      work_area.width) &&
	     (x + window_width + window->input.right > work_area.x))
	    ||
	    ((x - window->input.left > work_area.x) &&
	     (x - window->input.left < work_area.x + work_area.width))) {
		if (x + window_width + window->input.right >
		    work_area.x + work_area.width)
			x = work_area.x + work_area.width
			    - window_width - window->input.right;

		if (x - window->input.left < work_area.x)
			x = work_area.x + window->input.left;
	} else {
		//only use THIS code if the window is TOTALLY outside the viewport.
		while (x + window_width + window->input.right >
		       work_area.x + work_area.width)
			x -= work_area.width;

		/*while (x - window->input.left < work_area.x)
		   x += work_area.width; */
		if (x - window->input.left < work_area.x)
			x = work_area.x + window->input.left;
	}

      done_no_x_constraints:
	if (window->screen->nOutputDev == 1) {
		if (y + window_height + window->input.bottom >
		    work_area.y + work_area.height)
			y = work_area.y + work_area.height
			    - window_height - window->input.bottom;

		if (y - window->input.top < work_area.y)
			y = work_area.y + window->input.top;
	} else {
		int head = screenGetOutputDevForWindow(window);
		XRectangle workArea;

		screenGetOutputDevWorkArea(window->screen, head,
					   &workArea);

		if (y + window_height + window->input.bottom >
		    workArea.y + workArea.height)
			y = workArea.y + workArea.height - window_height -
			    window->input.bottom;

		if (y - window->input.top < workArea.y)
			y = workArea.y + window->input.top;

	}

      done_no_constraints:
	*new_x = x;
	*new_y = y;
}

/*static void
  placeHandleEvent (CompDisplay *d, XEvent *event)
  {
  CompScreen *s;
  CompWindow *w;

  PLACE_DISPLAY (d);

  switch (event->type) {
  case KeyPress:
  case KeyRelease:
  case ButtonPress:
  case ButtonRelease:
  s =  findScreenAtDisplay (d, event->xbutton.root);

  if (s)
  {
  PLACE_SCREEN (s);

  if (eventMatches(d, event, &ps->opt[PLACE_SCREEN_OPTION_CENTER_INITIATE])) 
  {
  w = findWindowAtScreen (s, d->activeWindow);
  if (w) placeCenterWindow (w);
  }
  }
  break;

  default:
  break;
  }

  UNWRAP (pd, d, handleEvent);
  (*d->handleEvent) (d, event);
  WRAP (pd, d, handleEvent, placeHandleEvent);

  }*/

static Bool
placeDamageWindowRect(CompWindow * w, Bool initial, BoxPtr rect)
{
	Bool status;

	PLACE_SCREEN(w->screen);

	UNWRAP(ps, w->screen, damageWindowRect);
	status = (*w->screen->damageWindowRect) (w, initial, rect);
	WRAP(ps, w->screen, damageWindowRect, placeDamageWindowRect);

	if (initial && !w->attrib.override_redirect && !w->placed) {
		int newX, newY;

		placeWindow(w, w->attrib.x, w->attrib.y, &newX, &newY);

		w->placed = TRUE;

		if (newX != w->attrib.x || newY != w->attrib.y) {
			moveWindow(w, newX - w->attrib.x,
				   newY - w->attrib.y, FALSE, TRUE);
			syncWindowPosition(w);
		}
	}

	return status;
}

static Bool placeInitDisplay(CompPlugin * p, CompDisplay * d)
{
	PlaceDisplay *pd;

	pd = malloc(sizeof(PlaceDisplay));
	if (!pd)
		return FALSE;

	pd->screenPrivateIndex = allocateScreenPrivateIndex(d);
	if (pd->screenPrivateIndex < 0) {
		free(pd);
		return FALSE;
	}

	d->privates[displayPrivateIndex].ptr = pd;

	//    WRAP (pd, d, handleEvent, placeHandleEvent);

	return TRUE;
}

static void placeFiniDisplay(CompPlugin * p, CompDisplay * d)
{
	PLACE_DISPLAY(d);

	//    UNWRAP (pd, d, handleEvent);

	freeScreenPrivateIndex(d, pd->screenPrivateIndex);

	free(pd);
}

static Bool placeInitScreen(CompPlugin * p, CompScreen * s)
{
	PlaceScreen *ps;

	PLACE_DISPLAY(s->display);

	ps = malloc(sizeof(PlaceScreen));
	if (!ps)
		return FALSE;

	placeScreenInitOptions(ps);
	//    addScreenBinding (s, &ps->opt[PLACE_SCREEN_OPTION_CENTER_INITIATE].value.bind);

	WRAP(ps, s, damageWindowRect, placeDamageWindowRect);

	s->privates[pd->screenPrivateIndex].ptr = ps;

	return TRUE;
}

static void placeFiniScreen(CompPlugin * p, CompScreen * s)
{
	PLACE_SCREEN(s);

	UNWRAP(ps, s, damageWindowRect);

	free(ps);
}

static Bool placeInit(CompPlugin * p)
{
	displayPrivateIndex = allocateDisplayPrivateIndex();
	if (displayPrivateIndex < 0)
		return FALSE;

	return TRUE;
}

static void placeFini(CompPlugin * p)
{
	if (displayPrivateIndex >= 0)
		freeDisplayPrivateIndex(displayPrivateIndex);
}

static CompPluginVTable placeVTable = {
	"place",
	N_("Place Windows"),
	N_("Place windows at appropriate positions when mapped"),
	placeInit,
	placeFini,
	placeInitDisplay,
	placeFiniDisplay,
	placeInitScreen,
	placeFiniScreen,
	0,			/* InitWindow */
	0,			/* FiniWindow */
	0,			/* GetDisplayOptions */
	0,			/* SetDisplayOption */
	placeGetScreenOptions,
	placeSetScreenOption,
	0,
	0,
	0,
	0,
	BERYL_ABI_INFO,
	"beryl-plugins",
	"wm"
};

CompPluginVTable *getCompPluginInfo(void)
{
	return &placeVTable;
}