reset

1 files changed, 0 insertions, 3116 deletions

diff --git a/src/win.c b/src/win.c
deleted file mode 100644
index 971bdc9..0000000
--- a/src/win.c
+++ /dev/null
@@ -1,3116 +0,0 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2011-2013, Christopher Jeffrey
-// Copyright (c) 2013 Richard Grenville <[email protected]>
-
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include <inttypes.h>
-#include <math.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <xcb/composite.h>
-#include <xcb/damage.h>
-#include <xcb/render.h>
-#include <xcb/xcb.h>
-#include <xcb/xcb_renderutil.h>
-#include <xcb/xinerama.h>
-
-#include "atom.h"
-#include "backend/backend.h"
-#include "backend/backend_common.h"
-#include "c2.h"
-#include "common.h"
-#include "compiler.h"
-#include "config.h"
-#include "list.h"
-#include "log.h"
-#include "picom.h"
-#include "region.h"
-#include "render.h"
-#include "string_utils.h"
-#include "types.h"
-#include "uthash_extra.h"
-#include "utils.h"
-#include "x.h"
-
-#ifdef CONFIG_DBUS
-#include "dbus.h"
-#endif
-
-#ifdef CONFIG_OPENGL
-// TODO(yshui) Get rid of this include
-#include "opengl.h"
-#endif
-
-#include "win.h"
-
-// TODO(yshui) Make more window states internal
-struct managed_win_internal {
-	struct managed_win base;
-};
-
-#define OPAQUE (0xffffffff)
-static const int WIN_GET_LEADER_MAX_RECURSION = 20;
-static const int ROUNDED_PIXELS = 1;
-static const double ROUNDED_PERCENT = 0.05;
-
-/**
- * Retrieve the <code>WM_CLASS</code> of a window and update its
- * <code>win</code> structure.
- */
-static bool win_update_class(session_t *ps, struct managed_win *w);
-static int win_update_role(session_t *ps, struct managed_win *w);
-static void win_update_wintype(session_t *ps, struct managed_win *w);
-static int win_update_name(session_t *ps, struct managed_win *w);
-/**
- * Reread opacity property of a window.
- */
-static void win_update_opacity_prop(session_t *ps, struct managed_win *w);
-static void win_update_opacity_target(session_t *ps, struct managed_win *w);
-/**
- * Retrieve frame extents from a window.
- */
-static void
-win_update_frame_extents(session_t *ps, struct managed_win *w, xcb_window_t client);
-static void win_update_prop_shadow_raw(session_t *ps, struct managed_win *w);
-static void win_update_prop_shadow(session_t *ps, struct managed_win *w);
-/**
- * Update leader of a window.
- */
-static void win_update_leader(session_t *ps, struct managed_win *w);
-
-/// Generate a "no corners" region function, from a function that returns the
-/// region via a region_t pointer argument. Corners of the window will be removed from
-/// the returned region.
-/// Function signature has to be (win *, region_t *)
-#define gen_without_corners(fun)                                                         \
-	void fun##_without_corners(const struct managed_win *w, region_t *res) {         \
-		fun(w, res);                                                             \
-		win_region_remove_corners(w, res);                                       \
-	}
-
-/// Generate a "return by value" function, from a function that returns the
-/// region via a region_t pointer argument.
-/// Function signature has to be (win *)
-#define gen_by_val(fun)                                                                  \
-	region_t fun##_by_val(const struct managed_win *w) {                             \
-		region_t ret;                                                            \
-		pixman_region32_init(&ret);                                              \
-		fun(w, &ret);                                                            \
-		return ret;                                                              \
-	}
-
-/**
- * Clear leader cache of all windows.
- */
-static inline void clear_cache_win_leaders(session_t *ps) {
-	win_stack_foreach_managed(w, &ps->window_stack) {
-		w->cache_leader = XCB_NONE;
-	}
-}
-
-static xcb_window_t win_get_leader_raw(session_t *ps, struct managed_win *w, int recursions);
-
-/**
- * Get the leader of a window.
- *
- * This function updates w->cache_leader if necessary.
- */
-static inline xcb_window_t win_get_leader(session_t *ps, struct managed_win *w) {
-	return win_get_leader_raw(ps, w, 0);
-}
-
-/**
- * Whether the real content of the window is visible.
- *
- * A window is not considered "real" visible if it's fading out. Because in that case a
- * cached version of the window is displayed.
- */
-static inline bool attr_pure win_is_real_visible(const struct managed_win *w) {
-	return w->state != WSTATE_UNMAPPED && w->state != WSTATE_DESTROYING &&
-	       w->state != WSTATE_UNMAPPING;
-}
-
-/**
- * Update focused state of a window.
- */
-static void win_update_focused(session_t *ps, struct managed_win *w) {
-	if (UNSET != w->focused_force) {
-		w->focused = w->focused_force;
-	} else {
-		w->focused = win_is_focused_raw(ps, w);
-
-		// Use wintype_focus, and treat WM windows and override-redirected
-		// windows specially
-		if (ps->o.wintype_option[w->window_type].focus ||
-		    (ps->o.mark_wmwin_focused && w->wmwin) ||
-		    (ps->o.mark_ovredir_focused && w->base.id == w->client_win && !w->wmwin) ||
-		    (w->a.map_state == XCB_MAP_STATE_VIEWABLE &&
-		     c2_match(ps, w, ps->o.focus_blacklist, NULL))) {
-			w->focused = true;
-		}
-
-		// If window grouping detection is enabled, mark the window active if
-		// its group is
-		if (ps->o.track_leader && ps->active_leader &&
-		    win_get_leader(ps, w) == ps->active_leader) {
-			w->focused = true;
-		}
-	}
-}
-
-/**
- * Run win_on_factor_change() on all windows with the same leader window.
- *
- * @param leader leader window ID
- */
-static inline void group_on_factor_change(session_t *ps, xcb_window_t leader) {
-	if (!leader) {
-		return;
-	}
-
-	HASH_ITER2(ps->windows, w) {
-		assert(!w->destroyed);
-		if (!w->managed) {
-			continue;
-		}
-		auto mw = (struct managed_win *)w;
-		if (win_get_leader(ps, mw) == leader) {
-			win_on_factor_change(ps, mw);
-		}
-	}
-}
-
-static inline const char *win_get_name_if_managed(const struct win *w) {
-	if (!w->managed) {
-		return "(unmanaged)";
-	}
-	auto mw = (struct managed_win *)w;
-	return mw->name;
-}
-
-/**
- * Return whether a window group is really focused.
- *
- * @param leader leader window ID
- * @return true if the window group is focused, false otherwise
- */
-static inline bool group_is_focused(session_t *ps, xcb_window_t leader) {
-	if (!leader) {
-		return false;
-	}
-
-	HASH_ITER2(ps->windows, w) {
-		assert(!w->destroyed);
-		if (!w->managed) {
-			continue;
-		}
-		auto mw = (struct managed_win *)w;
-		if (win_get_leader(ps, mw) == leader && win_is_focused_raw(ps, mw)) {
-			return true;
-		}
-	}
-
-	return false;
-}
-
-/**
- * Get a rectangular region a window occupies, excluding shadow.
- */
-static void win_get_region_local(const struct managed_win *w, region_t *res) {
-	assert(w->widthb >= 0 && w->heightb >= 0);
-	pixman_region32_fini(res);
-	pixman_region32_init_rect(res, 0, 0, (uint)w->widthb, (uint)w->heightb);
-}
-
-/**
- * Get a rectangular region a window occupies, excluding frame and shadow.
- */
-void win_get_region_noframe_local(const struct managed_win *w, region_t *res) {
-	const margin_t extents = win_calc_frame_extents(w);
-
-	int x = extents.left;
-	int y = extents.top;
-	int width = max2(w->widthb - (extents.left + extents.right), 0);
-	int height = max2(w->heightb - (extents.top + extents.bottom), 0);
-
-	pixman_region32_fini(res);
-	if (width > 0 && height > 0) {
-		pixman_region32_init_rect(res, x, y, (uint)width, (uint)height);
-	} else {
-		pixman_region32_init(res);
-	}
-}
-
-gen_without_corners(win_get_region_noframe_local);
-
-void win_get_region_frame_local(const struct managed_win *w, region_t *res) {
-	const margin_t extents = win_calc_frame_extents(w);
-	auto outer_width = w->widthb;
-	auto outer_height = w->heightb;
-
-	pixman_region32_fini(res);
-	pixman_region32_init_rects(
-	    res,
-	    (rect_t[]){
-	        // top
-	        {.x1 = 0, .y1 = 0, .x2 = outer_width, .y2 = extents.top},
-	        // bottom
-	        {.x1 = 0, .y1 = outer_height - extents.bottom, .x2 = outer_width, .y2 = outer_height},
-	        // left
-	        {.x1 = 0, .y1 = 0, .x2 = extents.left, .y2 = outer_height},
-	        // right
-	        {.x1 = outer_width - extents.right, .y1 = 0, .x2 = outer_width, .y2 = outer_height},
-	    },
-	    4);
-
-	// limit the frame region to inside the window
-	region_t reg_win;
-	pixman_region32_init_rects(&reg_win, (rect_t[]){{0, 0, outer_width, outer_height}}, 1);
-	pixman_region32_intersect(res, &reg_win, res);
-	pixman_region32_fini(&reg_win);
-}
-
-gen_by_val(win_get_region_frame_local);
-
-/**
- * Add a window to damaged area.
- *
- * @param ps current session
- * @param w struct _win element representing the window
- */
-void add_damage_from_win(session_t *ps, const struct managed_win *w) {
-	// XXX there was a cached extents region, investigate
-	//     if that's better
-
-	// TODO(yshui) use the bounding shape when the window is shaped, otherwise the
-	//             damage would be excessive
-	region_t extents;
-	pixman_region32_init(&extents);
-	win_extents(w, &extents);
-	add_damage(ps, &extents);
-	pixman_region32_fini(&extents);
-}
-
-/// Release the images attached to this window
-static inline void win_release_pixmap(backend_t *base, struct managed_win *w) {
-	log_debug("Releasing pixmap of window %#010x (%s)", w->base.id, w->name);
-	assert(w->win_image);
-	if (w->win_image) {
-		base->ops->release_image(base, w->win_image);
-		w->win_image = NULL;
-		// Bypassing win_set_flags, because `w` might have been destroyed
-		w->flags |= WIN_FLAGS_PIXMAP_NONE;
-	}
-}
-static inline void win_release_oldpixmap(backend_t *base, struct managed_win *w) {
-	log_debug("Releasing old_pixmap of window %#010x (%s)", w->base.id, w->name);
-	if (w->old_win_image) {
-		base->ops->release_image(base, w->old_win_image);
-		w->old_win_image = NULL;
-	}
-}
-static inline void win_release_shadow(backend_t *base, struct managed_win *w) {
-	log_debug("Releasing shadow of window %#010x (%s)", w->base.id, w->name);
-	assert(w->shadow_image);
-	if (w->shadow_image) {
-		base->ops->release_image(base, w->shadow_image);
-		w->shadow_image = NULL;
-		// Bypassing win_set_flags, because `w` might have been destroyed
-		w->flags |= WIN_FLAGS_SHADOW_NONE;
-	}
-}
-
-static inline bool win_bind_pixmap(struct backend_base *b, struct managed_win *w) {
-	assert(!w->win_image);
-	auto pixmap = x_new_id(b->c);
-	auto e = xcb_request_check(
-	    b->c, xcb_composite_name_window_pixmap_checked(b->c, w->base.id, pixmap));
-	if (e) {
-		log_error("Failed to get named pixmap for window %#010x(%s)", w->base.id,
-		          w->name);
-		free(e);
-		return false;
-	}
-	log_debug("New named pixmap for %#010x (%s) : %#010x", w->base.id, w->name, pixmap);
-	w->win_image =
-	    b->ops->bind_pixmap(b, pixmap, x_get_visual_info(b->c, w->a.visual), true);
-	if (!w->win_image) {
-		log_error("Failed to bind pixmap");
-		win_set_flags(w, WIN_FLAGS_IMAGE_ERROR);
-		return false;
-	}
-
-	win_clear_flags(w, WIN_FLAGS_PIXMAP_NONE);
-	return true;
-}
-
-bool win_bind_shadow(struct backend_base *b, struct managed_win *w, struct color c,
-                     struct conv *kernel) {
-	assert(!w->shadow_image);
-	assert(w->shadow);
-	w->shadow_image = b->ops->render_shadow(b, w->widthb, w->heightb, kernel, c.red,
-	                                        c.green, c.blue, c.alpha);
-	if (!w->shadow_image) {
-		log_error("Failed to bind shadow image, shadow will be disabled for "
-		          "%#010x (%s)",
-		          w->base.id, w->name);
-		win_set_flags(w, WIN_FLAGS_SHADOW_NONE);
-		w->shadow = false;
-		return false;
-	}
-
-	log_debug("New shadow for %#010x (%s)", w->base.id, w->name);
-	win_clear_flags(w, WIN_FLAGS_SHADOW_NONE);
-	return true;
-}
-
-void win_release_images(struct backend_base *backend, struct managed_win *w) {
-	// We don't want to decide what we should do if the image we want to release is
-	// stale (do we clear the stale flags or not?)
-	// But if we are not releasing any images anyway, we don't care about the stale
-	// flags.
-
-	if (!win_check_flags_all(w, WIN_FLAGS_PIXMAP_NONE)) {
-		assert(!win_check_flags_all(w, WIN_FLAGS_PIXMAP_STALE));
-		win_release_pixmap(backend, w);
-		win_release_oldpixmap(backend, w);
-	}
-
-	if (!win_check_flags_all(w, WIN_FLAGS_SHADOW_NONE)) {
-		assert(!win_check_flags_all(w, WIN_FLAGS_SHADOW_STALE));
-		win_release_shadow(backend, w);
-	}
-}
-
-/// Returns true if the `prop` property is stale, as well as clears the stale flag.
-static bool win_fetch_and_unset_property_stale(struct managed_win *w, xcb_atom_t prop);
-/// Returns true if any of the properties are stale, as well as clear all the stale flags.
-static void win_clear_all_properties_stale(struct managed_win *w);
-
-/// Fetch new window properties from the X server, and run appropriate updates. Might set
-/// WIN_FLAGS_FACTOR_CHANGED
-static void win_update_properties(session_t *ps, struct managed_win *w) {
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->a_NET_WM_WINDOW_TYPE)) {
-		win_update_wintype(ps, w);
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->a_NET_WM_WINDOW_OPACITY)) {
-		win_update_opacity_prop(ps, w);
-		// we cannot receive OPACITY change when window has been destroyed
-		assert(w->state != WSTATE_DESTROYING);
-		win_update_opacity_target(ps, w);
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->a_NET_FRAME_EXTENTS)) {
-		win_update_frame_extents(ps, w, w->client_win);
-		add_damage_from_win(ps, w);
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->aWM_NAME) ||
-	    win_fetch_and_unset_property_stale(w, ps->atoms->a_NET_WM_NAME)) {
-		if (win_update_name(ps, w) == 1) {
-			win_set_flags(w, WIN_FLAGS_FACTOR_CHANGED);
-		}
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->aWM_CLASS)) {
-		if (win_update_class(ps, w)) {
-			win_set_flags(w, WIN_FLAGS_FACTOR_CHANGED);
-		}
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->aWM_WINDOW_ROLE)) {
-		if (win_update_role(ps, w) == 1) {
-			win_set_flags(w, WIN_FLAGS_FACTOR_CHANGED);
-		}
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->a_COMPTON_SHADOW)) {
-		win_update_prop_shadow(ps, w);
-	}
-
-	if (win_fetch_and_unset_property_stale(w, ps->atoms->aWM_CLIENT_LEADER) ||
-	    win_fetch_and_unset_property_stale(w, ps->atoms->aWM_TRANSIENT_FOR)) {
-		win_update_leader(ps, w);
-	}
-
-	win_clear_all_properties_stale(w);
-}
-
-static void init_animation(session_t *ps, struct managed_win *w) {
-	enum open_window_animation animation = ps->o.animation_for_open_window;
-
-	w->animation_transient = wid_has_prop(ps, w->client_win, ps->atoms->aWM_TRANSIENT_FOR);
-
-	if (w->window_type != WINTYPE_TOOLTIP && w->animation_transient)
-		animation = ps->o.animation_for_transient_window;
-
-	if (ps->o.wintype_option[w->window_type].animation < OPEN_WINDOW_ANIMATION_INVALID)
-		animation = ps->o.wintype_option[w->window_type].animation;
-
-	if (ps->root_desktop_switch_direction != 0) {
-		if (ps->o.animation_for_workspace_switch_in == OPEN_WINDOW_ANIMATION_AUTO)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_IN;
-		else
-			animation = ps->o.animation_for_workspace_switch_in;
-	}
-
-	switch (animation) {
-	case OPEN_WINDOW_ANIMATION_AUTO:
-	case OPEN_WINDOW_ANIMATION_NONE: { // No animation
-		w->animation_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_w = w->pending_g.width;
-		w->animation_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_FLYIN: { // Fly-in from a random point outside the screen
-		// Compute random point off screen
-		double angle = 2 * M_PI * ((double)rand() / RAND_MAX);
-		const double radius =
-		    sqrt(ps->root_width * ps->root_width + ps->root_height * ps->root_height);
-
-		// Set animation
-		w->animation_center_x = ps->root_width * 0.5 + radius * cos(angle);
-		w->animation_center_y = ps->root_height * 0.5 + radius * sin(angle);
-		w->animation_w = 0;
-		w->animation_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_ZOOM: { // Zoom-in the image, without changing its location
-		w->animation_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_w = 0;
-		w->animation_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_UP: { // Slide up the image, without changing its location
-		w->animation_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height;
-		w->animation_w = w->pending_g.width;
-		w->animation_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_DOWN: { // Slide down the image, without changing its location
-		w->animation_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_center_y = w->pending_g.y;
-		w->animation_w = w->pending_g.width;
-		w->animation_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_LEFT: { // Slide left the image, without changing its location
-		w->animation_center_x = w->pending_g.x + w->pending_g.width;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_w = 0;
-		w->animation_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_RIGHT: { // Slide right the image, without changing its location
-		w->animation_center_x = w->pending_g.x;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_w = 0;
-		w->animation_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_IN: {
-		w->animation_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height * 0.5 -
-			ps->root_height *
-				((ps->root_desktop_switch_direction < 0 &&
-				 ps->root_desktop_switch_direction >= -1) ||
-				ps->root_desktop_switch_direction > 1?1:-1);
-		w->animation_w = w->pending_g.width;
-		w->animation_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_OUT: {
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5 -
-			ps->root_height *
-				((ps->root_desktop_switch_direction < 0 &&
-				 ps->root_desktop_switch_direction >= -1) ||
-				ps->root_desktop_switch_direction > 1?-1:1);
-		w->animation_dest_w = w->pending_g.width;
-		w->animation_dest_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_INVALID: assert(false); break;
-	}
-}
-
-static void init_animation_unmap(session_t *ps, struct managed_win *w) {
-	enum open_window_animation animation;
-
-	if (ps->o.animation_for_unmap_window == OPEN_WINDOW_ANIMATION_AUTO) {
-		animation = ps->o.animation_for_open_window;
-
-		if (w->window_type != WINTYPE_TOOLTIP && w->animation_transient)
-			animation = ps->o.animation_for_transient_window;
-
-		if (ps->o.wintype_option[w->window_type].animation < OPEN_WINDOW_ANIMATION_INVALID)
-			animation = ps->o.wintype_option[w->window_type].animation;
-
-		if (animation == OPEN_WINDOW_ANIMATION_SLIDE_UP)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_DOWN;
-		else if (animation == OPEN_WINDOW_ANIMATION_SLIDE_DOWN)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_UP;
-		else if (animation == OPEN_WINDOW_ANIMATION_SLIDE_LEFT)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_RIGHT;
-		else if (animation == OPEN_WINDOW_ANIMATION_SLIDE_RIGHT)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_LEFT;
-		else if (animation == OPEN_WINDOW_ANIMATION_SLIDE_IN)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_OUT;
-		else if (animation == OPEN_WINDOW_ANIMATION_SLIDE_OUT)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_IN;
-
-	} else {
-		animation = ps->o.animation_for_unmap_window;
-
-		if (ps->o.wintype_option[w->window_type].animation_unmap < OPEN_WINDOW_ANIMATION_INVALID)
-			animation = ps->o.wintype_option[w->window_type].animation_unmap;
-	}
-
-	if (ps->root_desktop_switch_direction != 0) {
-		if (ps->o.animation_for_workspace_switch_out == OPEN_WINDOW_ANIMATION_AUTO)
-			animation = OPEN_WINDOW_ANIMATION_SLIDE_OUT;
-		else
-			animation = ps->o.animation_for_workspace_switch_out;
-	}
-
-	switch (animation) {
-	case OPEN_WINDOW_ANIMATION_AUTO:
-	case OPEN_WINDOW_ANIMATION_NONE: { // No animation
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_dest_w = w->pending_g.width;
-		w->animation_dest_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_FLYIN: { // Fly-out from a random point outside the screen
-		// Compute random point off screen
-		double angle = 2 * M_PI * ((double)rand() / RAND_MAX);
-		const double radius =
-		    sqrt(ps->root_width * ps->root_width + ps->root_height * ps->root_height);
-
-		// Set animation
-		w->animation_dest_center_x = ps->root_width * 0.5 + radius * cos(angle);
-		w->animation_dest_center_y = ps->root_height * 0.5 + radius * sin(angle);
-		w->animation_dest_w = 0;
-		w->animation_dest_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_ZOOM: { // Zoom-out the image, without changing its location
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_dest_w = 0;
-		w->animation_dest_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_UP: { // Slide up the image, without changing its location
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_dest_center_y = w->pending_g.y;
-		w->animation_dest_w = w->pending_g.width;
-		w->animation_dest_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_DOWN: { // Slide down the image, without changing its location
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height;
-		w->animation_dest_w = w->pending_g.width;
-		w->animation_dest_h = 0;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_LEFT: { // Slide left the image, without changing its location
-		w->animation_dest_center_x = w->pending_g.x;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_dest_w = 0;
-		w->animation_dest_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_RIGHT: { // Slide right the image, without changing its location
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-		w->animation_dest_w = 0;
-		w->animation_dest_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_IN: {
-		w->animation_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_center_y = w->pending_g.y + w->pending_g.height * 0.5 -
-			ps->root_height *
-				((ps->root_desktop_switch_direction < 0 &&
-				 ps->root_desktop_switch_direction >= -1) ||
-				ps->root_desktop_switch_direction > 1?1:-1);
-		w->animation_w = w->pending_g.width;
-		w->animation_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_SLIDE_OUT: {
-		w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-		w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5 -
-			ps->root_height *
-				((ps->root_desktop_switch_direction < 0 &&
-				 ps->root_desktop_switch_direction >= -1) ||
-				ps->root_desktop_switch_direction > 1?-1:1);
-		w->animation_dest_w = w->pending_g.width;
-		w->animation_dest_h = w->pending_g.height;
-		break;
-	}
-	case OPEN_WINDOW_ANIMATION_INVALID: assert(false); break;
-	}
-}
-
-/// Handle non-image flags. This phase might set IMAGES_STALE flags
-void win_process_update_flags(session_t *ps, struct managed_win *w) {
-	// Whether the window was visible before we process the mapped flag. i.e. is the
-	// window just mapped.
-	bool was_visible = win_is_real_visible(w);
-	log_trace("Processing flags for window %#010x (%s), was visible: %d", w->base.id,
-	          w->name, was_visible);
-
-	if (win_check_flags_all(w, WIN_FLAGS_MAPPED)) {
-		map_win_start(ps, w);
-		win_clear_flags(w, WIN_FLAGS_MAPPED);
-	}
-
-	if (!win_is_real_visible(w)) {
-		// Flags of invisible windows are processed when they are mapped
-		return;
-	}
-
-	// Check client first, because later property updates need accurate client window
-	// information
-	if (win_check_flags_all(w, WIN_FLAGS_CLIENT_STALE)) {
-		win_recheck_client(ps, w);
-		win_clear_flags(w, WIN_FLAGS_CLIENT_STALE);
-	}
-
-	bool damaged = false;
-	if (win_check_flags_any(w, WIN_FLAGS_SIZE_STALE | WIN_FLAGS_POSITION_STALE)) {
-		if (was_visible) {
-			// Mark the old extents of this window as damaged. The new extents
-			// will be marked damaged below, after the window extents are
-			// updated.
-			//
-			// If the window is just mapped, we don't need to mark the old
-			// extent as damaged. (It's possible that the window was in fading
-			// and is interrupted by being mapped. In that case, the fading
-			// window will be added to damage by map_win_start, so we don't
-			// need to do it here)
-			add_damage_from_win(ps, w);
-		}
-
-		// Ignore animations all together if set to none on window type basis
-		if (ps->o.wintype_option[w->window_type].animation == 0) {
-			w->g = w->pending_g;
-
-		// Update window geometry
-		} else if (ps->o.animations) {
-			if (!was_visible) {
-				// Set window-open animation
-				init_animation(ps, w);
-
-				w->animation_dest_center_x = w->pending_g.x + w->pending_g.width * 0.5;
-				w->animation_dest_center_y = w->pending_g.y + w->pending_g.height * 0.5;
-				w->animation_dest_w = w->pending_g.width;
-				w->animation_dest_h = w->pending_g.height;
-
-				w->g.x = (int16_t)round(w->animation_center_x -
-										w->animation_w * 0.5);
-				w->g.y = (int16_t)round(w->animation_center_y -
-										w->animation_h * 0.5);
-				w->g.width = (uint16_t)round(w->animation_w);
-				w->g.height = (uint16_t)round(w->animation_h);
-
-			} else {
-				w->animation_dest_center_x =
-				    w->pending_g.x + w->pending_g.width * 0.5;
-				w->animation_dest_center_y =
-				    w->pending_g.y + w->pending_g.height * 0.5;
-				w->animation_dest_w = w->pending_g.width;
-				w->animation_dest_h = w->pending_g.height;
-			}
-
-			w->g.border_width = w->pending_g.border_width;
-
-			double x_dist = w->animation_dest_center_x - w->animation_center_x;
-			double y_dist = w->animation_dest_center_y - w->animation_center_y;
-			double w_dist = w->animation_dest_w - w->animation_w;
-			double h_dist = w->animation_dest_h - w->animation_h;
-			w->animation_inv_og_distance =
-				1.0 / sqrt(x_dist * x_dist + y_dist * y_dist +
-							w_dist * w_dist + h_dist * h_dist);
-
-			if (isinf(w->animation_inv_og_distance))
-				w->animation_inv_og_distance = 0;
-
-			// We only grab images if w->reg_ignore_valid is true as
-			// there's an ev_shape_notify() event fired quickly on new windows
-			// for e.g. in case of Firefox main menu and ev_shape_notify()
-			// sets the win_set_flags(w, WIN_FLAGS_SIZE_STALE); which
-			// brakes the new image captured and because this same event
-			// also sets w->reg_ignore_valid = false; too we check for it
-			if (w->reg_ignore_valid) {
-				if (w->old_win_image) {
-					ps->backend_data->ops->release_image(ps->backend_data,
-														w->old_win_image);
-					w->old_win_image = NULL;
-				}
-
-				// We only grab
-				if (w->win_image) {
-					w->old_win_image = ps->backend_data->ops->clone_image(
-						ps->backend_data, w->win_image, &w->bounding_shape);
-				}
-			}
-
-			w->animation_progress = 0.0;
-
-		} else {
-			w->g = w->pending_g;
-		}
-
-		if (win_check_flags_all(w, WIN_FLAGS_SIZE_STALE)) {
-			win_on_win_size_change(ps, w);
-			win_update_bounding_shape(ps, w);
-			damaged = true;
-			win_clear_flags(w, WIN_FLAGS_SIZE_STALE);
-		}
-
-		if (win_check_flags_all(w, WIN_FLAGS_POSITION_STALE)) {
-			damaged = true;
-			win_clear_flags(w, WIN_FLAGS_POSITION_STALE);
-		}
-
-		win_update_screen(ps->xinerama_nscrs, ps->xinerama_scr_regs, w);
-	}
-
-	if (win_check_flags_all(w, WIN_FLAGS_PROPERTY_STALE)) {
-		win_update_properties(ps, w);
-		win_clear_flags(w, WIN_FLAGS_PROPERTY_STALE);
-	}
-
-	// Factor change flags could be set by previous stages, so must be handled last
-	if (win_check_flags_all(w, WIN_FLAGS_FACTOR_CHANGED)) {
-		win_on_factor_change(ps, w);
-		win_clear_flags(w, WIN_FLAGS_FACTOR_CHANGED);
-	}
-
-	// Add damage, has to be done last so the window has the latest geometry
-	// information.
-	if (damaged) {
-		add_damage_from_win(ps, w);
-	}
-}
-
-void win_process_image_flags(session_t *ps, struct managed_win *w) {
-	assert(!win_check_flags_all(w, WIN_FLAGS_MAPPED));
-
-	if (w->state == WSTATE_UNMAPPED || w->state == WSTATE_DESTROYING ||
-	    w->state == WSTATE_UNMAPPING) {
-		// Flags of invisible windows are processed when they are mapped
-		return;
-	}
-
-	// Not a loop
-	while (win_check_flags_any(w, WIN_FLAGS_IMAGES_STALE) &&
-	       !win_check_flags_all(w, WIN_FLAGS_IMAGE_ERROR)) {
-		// Image needs to be updated, update it.
-		if (!ps->backend_data) {
-			// We are using legacy backend, nothing to do here.
-			break;
-		}
-
-		if (win_check_flags_all(w, WIN_FLAGS_PIXMAP_STALE)) {
-			// Check to make sure the window is still mapped, otherwise we
-			// won't be able to rebind pixmap after releasing it, yet we might
-			// still need the pixmap for rendering.
-			assert(w->state != WSTATE_UNMAPPING && w->state != WSTATE_DESTROYING);
-			if (!win_check_flags_all(w, WIN_FLAGS_PIXMAP_NONE)) {
-				// Must release images first, otherwise breaks
-				// NVIDIA driver
-				win_release_pixmap(ps->backend_data, w);
-			}
-			win_bind_pixmap(ps->backend_data, w);
-		}
-
-		if (win_check_flags_all(w, WIN_FLAGS_SHADOW_STALE)) {
-			if (!win_check_flags_all(w, WIN_FLAGS_SHADOW_NONE)) {
-				win_release_shadow(ps->backend_data, w);
-			}
-			if (w->shadow) {
-				win_bind_shadow(ps->backend_data, w,
-				                (struct color){.red = ps->o.shadow_red,
-				                               .green = ps->o.shadow_green,
-				                               .blue = ps->o.shadow_blue,
-				                               .alpha = ps->o.shadow_opacity},
-				                ps->gaussian_map);
-			}
-		}
-
-		// break here, loop always run only once
-		break;
-	}
-
-	// Clear stale image flags
-	if (win_check_flags_any(w, WIN_FLAGS_IMAGES_STALE)) {
-		win_clear_flags(w, WIN_FLAGS_IMAGES_STALE);
-	}
-}
-
-/**
- * Check if a window has rounded corners.
- * XXX This is really dumb
- */
-static bool attr_pure win_has_rounded_corners(const struct managed_win *w) {
-	if (!w->bounding_shaped) {
-		return false;
-	}
-
-	// Quit if border_size() returns XCB_NONE
-	if (!pixman_region32_not_empty((region_t *)&w->bounding_shape)) {
-		return false;
-	}
-
-	// Determine the minimum width/height of a rectangle that could mark
-	// a window as having rounded corners
-	auto minwidth =
-	    (uint16_t)max2(w->widthb * (1 - ROUNDED_PERCENT), w->widthb - ROUNDED_PIXELS);
-	auto minheight =
-	    (uint16_t)max2(w->heightb * (1 - ROUNDED_PERCENT), w->heightb - ROUNDED_PIXELS);
-
-	// Get the rectangles in the bounding region
-	int nrects = 0;
-	const rect_t *rects =
-	    pixman_region32_rectangles((region_t *)&w->bounding_shape, &nrects);
-
-	// Look for a rectangle large enough for this window be considered
-	// having rounded corners
-	for (int i = 0; i < nrects; ++i) {
-		if (rects[i].x2 - rects[i].x1 >= minwidth &&
-		    rects[i].y2 - rects[i].y1 >= minheight) {
-			return true;
-		}
-	}
-	return false;
-}
-
-int win_update_name(session_t *ps, struct managed_win *w) {
-	char **strlst = NULL;
-	int nstr = 0;
-
-	if (!w->client_win) {
-		return 0;
-	}
-
-	if (!(wid_get_text_prop(ps, w->client_win, ps->atoms->a_NET_WM_NAME, &strlst, &nstr))) {
-		log_debug("(%#010x): _NET_WM_NAME unset, falling back to WM_NAME.",
-		          w->client_win);
-
-		if (!wid_get_text_prop(ps, w->client_win, ps->atoms->aWM_NAME, &strlst, &nstr)) {
-			log_debug("Unsetting window name for %#010x", w->client_win);
-			free(w->name);
-			w->name = NULL;
-			return -1;
-		}
-	}
-
-	int ret = 0;
-	if (!w->name || strcmp(w->name, strlst[0]) != 0) {
-		ret = 1;
-		free(w->name);
-		w->name = strdup(strlst[0]);
-	}
-
-	free(strlst);
-
-	log_debug("(%#010x): client = %#010x, name = \"%s\", "
-	          "ret = %d",
-	          w->base.id, w->client_win, w->name, ret);
-	return ret;
-}
-
-static int win_update_role(session_t *ps, struct managed_win *w) {
-	char **strlst = NULL;
-	int nstr = 0;
-
-	if (!wid_get_text_prop(ps, w->client_win, ps->atoms->aWM_WINDOW_ROLE, &strlst, &nstr)) {
-		return -1;
-	}
-
-	int ret = 0;
-	if (!w->role || strcmp(w->role, strlst[0]) != 0) {
-		ret = 1;
-		free(w->role);
-		w->role = strdup(strlst[0]);
-	}
-
-	free(strlst);
-
-	log_trace("(%#010x): client = %#010x, role = \"%s\", "
-	          "ret = %d",
-	          w->base.id, w->client_win, w->role, ret);
-	return ret;
-}
-
-/**
- * Check if a window is bounding-shaped.
- */
-static inline bool win_bounding_shaped(const session_t *ps, xcb_window_t wid) {
-	if (ps->shape_exists) {
-		xcb_shape_query_extents_reply_t *reply;
-		Bool bounding_shaped;
-
-		reply = xcb_shape_query_extents_reply(
-		    ps->c, xcb_shape_query_extents(ps->c, wid), NULL);
-		bounding_shaped = reply && reply->bounding_shaped;
-		free(reply);
-
-		return bounding_shaped;
-	}
-
-	return false;
-}
-
-static wintype_t wid_get_prop_wintype(session_t *ps, xcb_window_t wid) {
-	winprop_t prop =
-	    x_get_prop(ps->c, wid, ps->atoms->a_NET_WM_WINDOW_TYPE, 32L, XCB_ATOM_ATOM, 32);
-
-	for (unsigned i = 0; i < prop.nitems; ++i) {
-		for (wintype_t j = 1; j < NUM_WINTYPES; ++j) {
-			if (ps->atoms_wintypes[j] == (xcb_atom_t)prop.p32[i]) {
-				free_winprop(&prop);
-				return j;
-			}
-		}
-	}
-
-	free_winprop(&prop);
-
-	return WINTYPE_UNKNOWN;
-}
-
-static bool
-wid_get_opacity_prop(session_t *ps, xcb_window_t wid, opacity_t def, opacity_t *out) {
-	bool ret = false;
-	*out = def;
-
-	winprop_t prop = x_get_prop(ps->c, wid, ps->atoms->a_NET_WM_WINDOW_OPACITY, 1L,
-	                            XCB_ATOM_CARDINAL, 32);
-
-	if (prop.nitems) {
-		*out = *prop.c32;
-		ret = true;
-	}
-
-	free_winprop(&prop);
-
-	return ret;
-}
-
-// XXX should distinguish between frame has alpha and window body has alpha
-bool win_has_alpha(const struct managed_win *w) {
-	return w->pictfmt && w->pictfmt->type == XCB_RENDER_PICT_TYPE_DIRECT &&
-	       w->pictfmt->direct.alpha_mask;
-}
-
-bool win_client_has_alpha(const struct managed_win *w) {
-	return w->client_pictfmt && w->client_pictfmt->type == XCB_RENDER_PICT_TYPE_DIRECT &&
-	       w->client_pictfmt->direct.alpha_mask;
-}
-
-winmode_t win_calc_mode(const struct managed_win *w) {
-	if (w->opacity < 1.0) {
-		return WMODE_TRANS;
-	}
-
-	if (win_has_alpha(w)) {
-		if (w->client_win == XCB_NONE) {
-			// This is a window not managed by the WM, and it has alpha,
-			// so it's transparent. No need to check WM frame.
-			return WMODE_TRANS;
-		}
-		// The WM window has alpha
-		if (win_client_has_alpha(w)) {
-			// The client window also has alpha, the entire window is
-			// transparent
-			return WMODE_TRANS;
-		}
-		if (win_has_frame(w)) {
-			// The client window doesn't have alpha, but we have a WM frame
-			// window, which has alpha.
-			return WMODE_FRAME_TRANS;
-		}
-		// Although the WM window has alpha, the frame window has 0 size, so
-		// consider the window solid
-	}
-
-	if (w->frame_opacity != 1.0 && win_has_frame(w)) {
-		return WMODE_FRAME_TRANS;
-	}
-
-	// log_trace("Window %#010x(%s) is solid", w->client_win, w->name);
-	return WMODE_SOLID;
-}
-
-/**
- * Calculate and return the opacity target of a window.
- *
- * The priority of opacity settings are:
- *
- * inactive_opacity_override (if set, and unfocused) > _NET_WM_WINDOW_OPACITY (if set) >
- * opacity-rules (if matched) > window type default opacity > active/inactive opacity
- *
- * @param ps           current session
- * @param w            struct _win object representing the window
- *
- * @return target opacity
- */
-double win_calc_opacity_target(session_t *ps, const struct managed_win *w) {
-	double opacity = 1;
-
-	if (w->state == WSTATE_UNMAPPED) {
-		// be consistent
-		return 0;
-	}
-	if (w->state == WSTATE_UNMAPPING || w->state == WSTATE_DESTROYING) {
-		if (ps->root_desktop_switch_direction)
-			return w->opacity;
-
-		return 0;
-	}
-	// Try obeying opacity property and window type opacity firstly
-	if (w->has_opacity_prop) {
-		opacity = ((double)w->opacity_prop) / OPAQUE;
-	} else if (w->opacity_is_set) {
-		opacity = w->opacity_set;
-	} else if (!safe_isnan(ps->o.wintype_option[w->window_type].opacity)) {
-		opacity = ps->o.wintype_option[w->window_type].opacity;
-	} else {
-		// Respect active_opacity only when the window is physically focused
-		if (win_is_focused_raw(ps, w))
-			opacity = ps->o.active_opacity;
-		else if (!w->focused)
-			// Respect inactive_opacity in some cases
-			opacity = ps->o.inactive_opacity;
-	}
-
-	// respect inactive override
-	if (ps->o.inactive_opacity_override && !w->focused) {
-		opacity = ps->o.inactive_opacity;
-	}
-
-	return opacity;
-}
-
-/**
- * Determine whether a window is to be dimmed.
- */
-bool win_should_dim(session_t *ps, const struct managed_win *w) {
-	// Make sure we do nothing if the window is unmapped / being destroyed
-	if (w->state == WSTATE_UNMAPPED) {
-		return false;
-	}
-
-	if (ps->o.inactive_dim > 0 && !(w->focused)) {
-		return true;
-	} else {
-		return false;
-	}
-}
-
-/**
- * Determine if a window should fade on opacity change.
- */
-bool win_should_fade(session_t *ps, const struct managed_win *w) {
-	// To prevent it from being overwritten by last-paint value if the window is
-	if (w->fade_force != UNSET) {
-		return w->fade_force;
-	}
-	if (ps->o.no_fading_openclose && w->in_openclose) {
-		return false;
-	}
-	if (ps->o.no_fading_destroyed_argb && w->state == WSTATE_DESTROYING &&
-	    win_has_alpha(w) && w->client_win && w->client_win != w->base.id) {
-		// deprecated
-		return false;
-	}
-	if (w->fade_excluded) {
-		return false;
-	}
-	return ps->o.wintype_option[w->window_type].fade;
-}
-
-/**
- * Reread _COMPTON_SHADOW property from a window.
- *
- * The property must be set on the outermost window, usually the WM frame.
- */
-void win_update_prop_shadow_raw(session_t *ps, struct managed_win *w) {
-	winprop_t prop = x_get_prop(ps->c, w->base.id, ps->atoms->a_COMPTON_SHADOW, 1,
-	                            XCB_ATOM_CARDINAL, 32);
-
-	if (!prop.nitems) {
-		w->prop_shadow = -1;
-	} else {
-		w->prop_shadow = *prop.c32;
-	}
-
-	free_winprop(&prop);
-}
-
-static void win_set_shadow(session_t *ps, struct managed_win *w, bool shadow_new) {
-	if (w->shadow == shadow_new) {
-		return;
-	}
-
-	log_debug("Updating shadow property of window %#010x (%s) to %d", w->base.id,
-	          w->name, shadow_new);
-
-	// We don't handle property updates of non-visible windows until they are mapped.
-	assert(w->state != WSTATE_UNMAPPED && w->state != WSTATE_DESTROYING &&
-	       w->state != WSTATE_UNMAPPING);
-
-	// Keep a copy of window extent before the shadow change. Will be used for
-	// calculation of damaged region
-	region_t extents;
-	pixman_region32_init(&extents);
-	win_extents(w, &extents);
-
-	// Apply the shadow change
-	w->shadow = shadow_new;
-
-	if (ps->redirected) {
-		// Add damage for shadow change
-
-		// Window extents need update on shadow state change
-		// Shadow geometry currently doesn't change on shadow state change
-		// calc_shadow_geometry(ps, w);
-
-		// Note: because the release and creation of the shadow images are
-		// delayed. When multiple shadow changes happen in a row, without
-		// rendering phase between them, there could be a stale shadow image
-		// attached to the window even if w->shadow was previously false. And vice
-		// versa. So we check the STALE flag before asserting the existence of the
-		// shadow image.
-		if (w->shadow) {
-			// Mark the new extents as damaged if the shadow is added
-			assert(!w->shadow_image ||
-			       win_check_flags_all(w, WIN_FLAGS_SHADOW_STALE) ||
-			       !ps->o.experimental_backends);
-			pixman_region32_clear(&extents);
-			win_extents(w, &extents);
-			add_damage_from_win(ps, w);
-		} else {
-			// Mark the old extents as damaged if the shadow is removed
-			assert(w->shadow_image ||
-			       win_check_flags_all(w, WIN_FLAGS_SHADOW_STALE) ||
-			       !ps->o.experimental_backends);
-			add_damage(ps, &extents);
-		}
-
-		// Delayed update of shadow image
-		// By setting WIN_FLAGS_SHADOW_STALE, we ask win_process_flags to
-		// re-create or release the shaodw in based on whether w->shadow is set.
-		win_set_flags(w, WIN_FLAGS_SHADOW_STALE);
-
-		// Only set pending_updates if we are redirected. Otherwise change of a
-		// shadow won't have influence on whether we should redirect.
-		ps->pending_updates = true;
-	}
-
-	pixman_region32_fini(&extents);
-}
-
-/**
- * Determine if a window should have shadow, and update things depending
- * on shadow state.
- */
-static void win_determine_shadow(session_t *ps, struct managed_win *w) {
-	log_debug("Determining shadow of window %#010x (%s)", w->base.id, w->name);
-	bool shadow_new = w->shadow;
-
-	if (w->shadow_force != UNSET) {
-		shadow_new = w->shadow_force;
-	} else if (w->a.map_state == XCB_MAP_STATE_VIEWABLE) {
-		shadow_new = true;
-		if (!ps->o.wintype_option[w->window_type].shadow) {
-			log_debug("Shadow disabled by wintypes");
-			shadow_new = false;
-		} else if (c2_match(ps, w, ps->o.shadow_blacklist, NULL)) {
-			log_debug("Shadow disabled by shadow-exclude");
-			shadow_new = false;
-		} else if (ps->o.shadow_ignore_shaped && w->bounding_shaped &&
-		           !w->rounded_corners) {
-			log_debug("Shadow disabled by shadow-ignore-shaped");
-			shadow_new = false;
-		} else if (w->prop_shadow == 0) {
-			log_debug("Shadow disabled by shadow property");
-			shadow_new = false;
-		}
-	}
-
-	win_set_shadow(ps, w, shadow_new);
-}
-
-/**
- * Reread _COMPTON_SHADOW property from a window and update related
- * things.
- */
-void win_update_prop_shadow(session_t *ps, struct managed_win *w) {
-	long attr_shadow_old = w->prop_shadow;
-
-	win_update_prop_shadow_raw(ps, w);
-
-	if (w->prop_shadow != attr_shadow_old) {
-		win_determine_shadow(ps, w);
-	}
-}
-
-static void win_determine_clip_shadow_above(session_t *ps, struct managed_win *w) {
-	bool should_crop = (ps->o.wintype_option[w->window_type].clip_shadow_above ||
-	                    c2_match(ps, w, ps->o.shadow_clip_list, NULL));
-	w->clip_shadow_above = should_crop;
-}
-
-static void win_set_invert_color(session_t *ps, struct managed_win *w, bool invert_color_new) {
-	if (w->invert_color == invert_color_new) {
-		return;
-	}
-
-	w->invert_color = invert_color_new;
-
-	add_damage_from_win(ps, w);
-}
-
-/**
- * Determine if a window should have color inverted.
- */
-static void win_determine_invert_color(session_t *ps, struct managed_win *w) {
-	bool invert_color_new = w->invert_color;
-
-	if (UNSET != w->invert_color_force) {
-		invert_color_new = w->invert_color_force;
-	} else if (w->a.map_state == XCB_MAP_STATE_VIEWABLE) {
-		invert_color_new = c2_match(ps, w, ps->o.invert_color_list, NULL);
-	}
-
-	win_set_invert_color(ps, w, invert_color_new);
-}
-
-/**
- * Set w->invert_color_force of a window.
- */
-void win_set_invert_color_force(session_t *ps, struct managed_win *w, switch_t val) {
-	if (val != w->invert_color_force) {
-		w->invert_color_force = val;
-		win_determine_invert_color(ps, w);
-		queue_redraw(ps);
-	}
-}
-
-/**
- * Set w->fade_force of a window.
- *
- * Doesn't affect fading already in progress
- */
-void win_set_fade_force(struct managed_win *w, switch_t val) {
-	w->fade_force = val;
-}
-
-/**
- * Set w->focused_force of a window.
- */
-void win_set_focused_force(session_t *ps, struct managed_win *w, switch_t val) {
-	if (val != w->focused_force) {
-		w->focused_force = val;
-		win_on_factor_change(ps, w);
-		queue_redraw(ps);
-	}
-}
-
-/**
- * Set w->shadow_force of a window.
- */
-void win_set_shadow_force(session_t *ps, struct managed_win *w, switch_t val) {
-	if (val != w->shadow_force) {
-		w->shadow_force = val;
-		win_determine_shadow(ps, w);
-		queue_redraw(ps);
-	}
-}
-
-static void
-win_set_blur_background(session_t *ps, struct managed_win *w, bool blur_background_new) {
-	if (w->blur_background == blur_background_new)
-		return;
-
-	w->blur_background = blur_background_new;
-
-	// This damage might not be absolutely necessary (e.g. when the window is opaque),
-	// but blur_background changes should be rare, so this should be fine.
-	add_damage_from_win(ps, w);
-}
-
-/**
- * Determine if a window should have background blurred.
- */
-static void win_determine_blur_background(session_t *ps, struct managed_win *w) {
-	log_debug("Determining blur-background of window %#010x (%s)", w->base.id, w->name);
-	if (w->a.map_state != XCB_MAP_STATE_VIEWABLE) {
-		return;
-	}
-
-	bool blur_background_new = ps->o.blur_method != BLUR_METHOD_NONE;
-	if (blur_background_new) {
-		if (!ps->o.wintype_option[w->window_type].blur_background) {
-			log_debug("Blur background disabled by wintypes");
-			blur_background_new = false;
-		} else if (c2_match(ps, w, ps->o.blur_background_blacklist, NULL)) {
-			log_debug("Blur background disabled by blur-background-exclude");
-			blur_background_new = false;
-		}
-	}
-
-	win_set_blur_background(ps, w, blur_background_new);
-}
-
-/**
- * Determine if a window should have rounded corners.
- */
-static void win_determine_rounded_corners(session_t *ps, struct managed_win *w) {
-	if (ps->o.corner_radius == 0) {
-		w->corner_radius = 0;
-		return;
-	}
-
-	// Don't round full screen windows & excluded windows
-	if ((w && win_is_fullscreen(ps, w)) ||
-	    c2_match(ps, w, ps->o.rounded_corners_blacklist, NULL)) {
-		w->corner_radius = 0;
-		log_debug("Not rounding corners for window %#010x", w->base.id);
-	} else {
-		w->corner_radius = ps->o.corner_radius;
-		log_debug("Rounding corners for window %#010x", w->base.id);
-		// Initialize the border color to an invalid value
-		w->border_col[0] = w->border_col[1] = w->border_col[2] =
-		    w->border_col[3] = -1.0F;
-	}
-}
-
-/**
- * Update window opacity according to opacity rules.
- */
-void win_update_opacity_rule(session_t *ps, struct managed_win *w) {
-	if (w->a.map_state != XCB_MAP_STATE_VIEWABLE) {
-		return;
-	}
-
-	double opacity = 1.0;
-	bool is_set = false;
-	void *val = NULL;
-	if (c2_match(ps, w, ps->o.opacity_rules, &val)) {
-		opacity = ((double)(long)val) / 100.0;
-		is_set = true;
-	}
-
-	w->opacity_set = opacity;
-	w->opacity_is_set = is_set;
-}
-
-/**
- * Function to be called on window data changes.
- *
- * TODO(yshui) need better name
- */
-void win_on_factor_change(session_t *ps, struct managed_win *w) {
-	log_debug("Window %#010x (%s) factor change", w->base.id, w->name);
-	// Focus needs to be updated first, as other rules might depend on the focused
-	// state of the window
-	win_update_focused(ps, w);
-
-	win_determine_shadow(ps, w);
-	win_determine_clip_shadow_above(ps, w);
-	win_determine_invert_color(ps, w);
-	win_determine_blur_background(ps, w);
-	win_determine_rounded_corners(ps, w);
-	w->mode = win_calc_mode(w);
-	log_debug("Window mode changed to %d", w->mode);
-	win_update_opacity_rule(ps, w);
-	if (w->a.map_state == XCB_MAP_STATE_VIEWABLE) {
-		w->paint_excluded = c2_match(ps, w, ps->o.paint_blacklist, NULL);
-	}
-	if (w->a.map_state == XCB_MAP_STATE_VIEWABLE) {
-		w->unredir_if_possible_excluded =
-		    c2_match(ps, w, ps->o.unredir_if_possible_blacklist, NULL);
-	}
-
-	w->fade_excluded = c2_match(ps, w, ps->o.fade_blacklist, NULL);
-
-	win_update_opacity_target(ps, w);
-
-	w->reg_ignore_valid = false;
-}
-
-/**
- * Update cache data in struct _win that depends on window size.
- */
-void win_on_win_size_change(session_t *ps, struct managed_win *w) {
-	w->widthb = w->g.width + w->g.border_width * 2;
-	w->heightb = w->g.height + w->g.border_width * 2;
-	w->shadow_dx = ps->o.shadow_offset_x;
-	w->shadow_dy = ps->o.shadow_offset_y;
-	w->shadow_width = w->widthb + ps->o.shadow_radius * 2;
-	w->shadow_height = w->heightb + ps->o.shadow_radius * 2;
-
-	// We don't handle property updates of non-visible windows until they are mapped.
-	assert(w->state != WSTATE_UNMAPPED && w->state != WSTATE_DESTROYING &&
-	       w->state != WSTATE_UNMAPPING);
-
-	// Invalidate the shadow we built
-	if (w->state != WSTATE_DESTROYING)
-		win_set_flags(w, WIN_FLAGS_IMAGES_STALE);
-
-	ps->pending_updates = true;
-	free_paint(ps, &w->shadow_paint);
-}
-
-/**
- * Update window type.
- */
-void win_update_wintype(session_t *ps, struct managed_win *w) {
-	const wintype_t wtype_old = w->window_type;
-
-	// Detect window type here
-	w->window_type = wid_get_prop_wintype(ps, w->client_win);
-
-	// Conform to EWMH standard, if _NET_WM_WINDOW_TYPE is not present, take
-	// override-redirect windows or windows without WM_TRANSIENT_FOR as
-	// _NET_WM_WINDOW_TYPE_NORMAL, otherwise as _NET_WM_WINDOW_TYPE_DIALOG.
-	if (WINTYPE_UNKNOWN == w->window_type) {
-		if (w->a.override_redirect ||
-		    !wid_has_prop(ps, w->client_win, ps->atoms->aWM_TRANSIENT_FOR))
-			w->window_type = WINTYPE_NORMAL;
-		else
-			w->window_type = WINTYPE_DIALOG;
-	}
-
-	if (w->window_type != wtype_old) {
-		win_on_factor_change(ps, w);
-	}
-}
-
-/**
- * Mark a window as the client window of another.
- *
- * @param ps current session
- * @param w struct _win of the parent window
- * @param client window ID of the client window
- */
-void win_mark_client(session_t *ps, struct managed_win *w, xcb_window_t client) {
-	w->client_win = client;
-
-	// If the window isn't mapped yet, stop here, as the function will be
-	// called in map_win()
-	if (w->a.map_state != XCB_MAP_STATE_VIEWABLE) {
-		return;
-	}
-
-	auto e = xcb_request_check(
-	    ps->c, xcb_change_window_attributes(
-	               ps->c, client, XCB_CW_EVENT_MASK,
-	               (const uint32_t[]){determine_evmask(ps, client, WIN_EVMODE_CLIENT)}));
-	if (e) {
-		log_error("Failed to change event mask of window %#010x", client);
-		free(e);
-	}
-
-	win_update_wintype(ps, w);
-
-	// Get frame widths. The window is in damaged area already.
-	win_update_frame_extents(ps, w, client);
-
-	// Get window group
-	if (ps->o.track_leader) {
-		win_update_leader(ps, w);
-	}
-
-	// Get window name and class if we are tracking them
-	win_update_name(ps, w);
-	win_update_class(ps, w);
-	win_update_role(ps, w);
-
-	// Update everything related to conditions
-	win_on_factor_change(ps, w);
-
-	auto r = xcb_get_window_attributes_reply(
-	    ps->c, xcb_get_window_attributes(ps->c, w->client_win), &e);
-	if (!r) {
-		log_error_x_error(e, "Failed to get client window attributes");
-		return;
-	}
-
-	w->client_pictfmt = x_get_pictform_for_visual(ps->c, r->visual);
-	free(r);
-}
-
-/**
- * Unmark current client window of a window.
- *
- * @param ps current session
- * @param w struct _win of the parent window
- */
-void win_unmark_client(session_t *ps, struct managed_win *w) {
-	xcb_window_t client = w->client_win;
-	log_debug("Detaching client window %#010x from frame %#010x (%s)", client,
-	          w->base.id, w->name);
-
-	w->client_win = XCB_NONE;
-
-	// Recheck event mask
-	xcb_change_window_attributes(
-	    ps->c, client, XCB_CW_EVENT_MASK,
-	    (const uint32_t[]){determine_evmask(ps, client, WIN_EVMODE_UNKNOWN)});
-}
-
-/**
- * Look for the client window of a particular window.
- */
-static xcb_window_t find_client_win(session_t *ps, xcb_window_t w) {
-	if (wid_has_prop(ps, w, ps->atoms->aWM_STATE)) {
-		return w;
-	}
-
-	xcb_query_tree_reply_t *reply =
-	    xcb_query_tree_reply(ps->c, xcb_query_tree(ps->c, w), NULL);
-	if (!reply) {
-		return 0;
-	}
-
-	xcb_window_t *children = xcb_query_tree_children(reply);
-	int nchildren = xcb_query_tree_children_length(reply);
-	int i;
-	xcb_window_t ret = 0;
-
-	for (i = 0; i < nchildren; ++i) {
-		if ((ret = find_client_win(ps, children[i]))) {
-			break;
-		}
-	}
-
-	free(reply);
-
-	return ret;
-}
-
-/**
- * Recheck client window of a window.
- *
- * @param ps current session
- * @param w struct _win of the parent window
- */
-void win_recheck_client(session_t *ps, struct managed_win *w) {
-	assert(ps->server_grabbed);
-	// Initialize wmwin to false
-	w->wmwin = false;
-
-	// Look for the client window
-
-	// Always recursively look for a window with WM_STATE, as Fluxbox
-	// sets override-redirect flags on all frame windows.
-	xcb_window_t cw = find_client_win(ps, w->base.id);
-	if (cw) {
-		log_debug("(%#010x): client %#010x", w->base.id, cw);
-	}
-	// Set a window's client window to itself if we couldn't find a
-	// client window
-	if (!cw) {
-		cw = w->base.id;
-		w->wmwin = !w->a.override_redirect;
-		log_debug("(%#010x): client self (%s)", w->base.id,
-		          (w->wmwin ? "wmwin" : "override-redirected"));
-	}
-
-	// Unmark the old one
-	if (w->client_win && w->client_win != cw) {
-		win_unmark_client(ps, w);
-	}
-
-	// Mark the new one
-	win_mark_client(ps, w, cw);
-}
-
-/**
- * Free all resources in a <code>struct _win</code>.
- */
-void free_win_res(session_t *ps, struct managed_win *w) {
-	// No need to call backend release_image here because
-	// finish_unmap_win should've done that for us.
-	// XXX unless we are called by session_destroy
-	// assert(w->win_data == NULL);
-	free_win_res_glx(ps, w);
-	free_paint(ps, &w->paint);
-	free_paint(ps, &w->shadow_paint);
-	// Above should be done during unmapping
-	// Except when we are called by session_destroy
-
-	pixman_region32_fini(&w->bounding_shape);
-	// BadDamage may be thrown if the window is destroyed
-	set_ignore_cookie(ps, xcb_damage_destroy(ps->c, w->damage));
-	rc_region_unref(&w->reg_ignore);
-	free(w->name);
-	free(w->class_instance);
-	free(w->class_general);
-	free(w->role);
-
-	free(w->stale_props);
-	w->stale_props = NULL;
-	w->stale_props_capacity = 0;
-}
-
-/// Insert a new window after list_node `prev`
-/// New window will be in unmapped state
-static struct win *add_win(session_t *ps, xcb_window_t id, struct list_node *prev) {
-	log_debug("Adding window %#010x", id);
-	struct win *old_w = NULL;
-	HASH_FIND_INT(ps->windows, &id, old_w);
-	assert(old_w == NULL);
-
-	auto new_w = cmalloc(struct win);
-	list_insert_after(prev, &new_w->stack_neighbour);
-	new_w->id = id;
-	new_w->managed = false;
-	new_w->is_new = true;
-	new_w->destroyed = false;
-
-	HASH_ADD_INT(ps->windows, id, new_w);
-	ps->pending_updates = true;
-	return new_w;
-}
-
-/// Insert a new win entry at the top of the stack
-struct win *add_win_top(session_t *ps, xcb_window_t id) {
-	return add_win(ps, id, &ps->window_stack);
-}
-
-/// Insert a new window above window with id `below`, if there is no window, add to top
-/// New window will be in unmapped state
-struct win *add_win_above(session_t *ps, xcb_window_t id, xcb_window_t below) {
-	struct win *w = NULL;
-	HASH_FIND_INT(ps->windows, &below, w);
-	if (!w) {
-		if (!list_is_empty(&ps->window_stack)) {
-			// `below` window is not found even if the window stack is not
-			// empty
-			return NULL;
-		}
-		return add_win_top(ps, id);
-	} else {
-		// we found something from the hash table, so if the stack is empty,
-		// we are in an inconsistent state.
-		assert(!list_is_empty(&ps->window_stack));
-		return add_win(ps, id, w->stack_neighbour.prev);
-	}
-}
-
-/// Query the Xorg for information about window `win`
-/// `win` pointer might become invalid after this function returns
-/// Returns the pointer to the window, might be different from `w`
-struct win *fill_win(session_t *ps, struct win *w) {
-	static const struct managed_win win_def = {
-	    // No need to initialize. (or, you can think that
-	    // they are initialized right here).
-	    // The following ones are updated during paint or paint preprocess
-	    .shadow_opacity = 0.0,
-	    .to_paint = false,
-	    .frame_opacity = 1.0,
-	    .dim = false,
-	    .invert_color = false,
-	    .blur_background = false,
-	    .reg_ignore = NULL,
-	    // The following ones are updated for other reasons
-	    .pixmap_damaged = false,         // updated by damage events
-	    .state = WSTATE_UNMAPPED,        // updated by window state changes
-	    .in_openclose = true,            // set to false after first map is done,
-	                                     // true here because window is just created
-	    .animation_velocity_x = 0.0,             // updated by window geometry changes
-	    .animation_velocity_y = 0.0,             // updated by window geometry changes
-	    .animation_velocity_w = 0.0,             // updated by window geometry changes
-	    .animation_velocity_h = 0.0,             // updated by window geometry changes
-	    .animation_progress = 1.0,               // updated by window geometry changes
-	    .animation_inv_og_distance = NAN,        // updated by window geometry changes
-	    .reg_ignore_valid = false,               // set to true when damaged
-	    .flags = WIN_FLAGS_IMAGES_NONE,          // updated by property/attributes/etc
-	                                             // change
-	    .stale_props = NULL,
-	    .stale_props_capacity = 0,
-
-	    // Runtime variables, updated by dbus
-	    .fade_force = UNSET,
-	    .shadow_force = UNSET,
-	    .focused_force = UNSET,
-	    .invert_color_force = UNSET,
-
-	    // Initialized in this function
-	    .a = {0},
-	    .pictfmt = NULL,
-	    .client_pictfmt = NULL,
-	    .widthb = 0,
-	    .heightb = 0,
-	    .shadow_dx = 0,
-	    .shadow_dy = 0,
-	    .shadow_width = 0,
-	    .shadow_height = 0,
-	    .damage = XCB_NONE,
-
-	    // Not initialized until mapped, this variables
-	    // have no meaning or have no use until the window
-	    // is mapped
-	    .win_image = NULL,
-	    .old_win_image = NULL,
-	    .shadow_image = NULL,
-	    .prev_trans = NULL,
-	    .shadow = false,
-	    .clip_shadow_above = false,
-	    .xinerama_scr = -1,
-	    .mode = WMODE_TRANS,
-	    .ever_damaged = false,
-	    .client_win = XCB_NONE,
-	    .leader = XCB_NONE,
-	    .cache_leader = XCB_NONE,
-	    .window_type = WINTYPE_UNKNOWN,
-	    .wmwin = false,
-	    .focused = false,
-	    .opacity = 0,
-	    .opacity_target = 0,
-	    .has_opacity_prop = false,
-	    .opacity_prop = OPAQUE,
-	    .opacity_is_set = false,
-	    .opacity_set = 1,
-	    .frame_extents = MARGIN_INIT,        // in win_mark_client
-	    .bounding_shaped = false,
-	    .bounding_shape = {0},
-	    .rounded_corners = false,
-	    .paint_excluded = false,
-	    .fade_excluded = false,
-	    .unredir_if_possible_excluded = false,
-	    .prop_shadow = -1,
-	    // following 4 are set in win_mark_client
-	    .name = NULL,
-	    .class_instance = NULL,
-	    .class_general = NULL,
-	    .role = NULL,
-
-	    // Initialized during paint
-	    .paint = PAINT_INIT,
-	    .shadow_paint = PAINT_INIT,
-
-	    .corner_radius = 0,
-	};
-
-	assert(!w->destroyed);
-	assert(w->is_new);
-
-	w->is_new = false;
-
-	// Reject overlay window and already added windows
-	if (w->id == ps->overlay) {
-		return w;
-	}
-
-	auto duplicated_win = find_managed_win(ps, w->id);
-	if (duplicated_win) {
-		log_debug("Window %#010x (recorded name: %s) added multiple times", w->id,
-		          duplicated_win->name);
-		return &duplicated_win->base;
-	}
-
-	log_debug("Managing window %#010x", w->id);
-	xcb_get_window_attributes_cookie_t acookie = xcb_get_window_attributes(ps->c, w->id);
-	xcb_get_window_attributes_reply_t *a =
-	    xcb_get_window_attributes_reply(ps->c, acookie, NULL);
-	if (!a || a->map_state == XCB_MAP_STATE_UNVIEWABLE) {
-		// Failed to get window attributes or geometry probably means
-		// the window is gone already. Unviewable means the window is
-		// already reparented elsewhere.
-		// BTW, we don't care about Input Only windows, except for stacking
-		// proposes, so we need to keep track of them still.
-		free(a);
-		return w;
-	}
-
-	if (a->_class == XCB_WINDOW_CLASS_INPUT_ONLY) {
-		// No need to manage this window, but we still keep it on the window stack
-		w->managed = false;
-		free(a);
-		return w;
-	}
-
-	// Allocate and initialize the new win structure
-	auto new_internal = cmalloc(struct managed_win_internal);
-	auto new = (struct managed_win *)new_internal;
-
-	// Fill structure
-	// We only need to initialize the part that are not initialized
-	// by map_win
-	*new = win_def;
-	new->base = *w;
-	new->base.managed = true;
-	new->a = *a;
-	pixman_region32_init(&new->bounding_shape);
-
-	free(a);
-
-	xcb_generic_error_t *e;
-	auto g = xcb_get_geometry_reply(ps->c, xcb_get_geometry(ps->c, w->id), &e);
-	if (!g) {
-		log_error_x_error(e, "Failed to get geometry of window %#010x", w->id);
-		free(e);
-		free(new);
-		return w;
-	}
-	new->pending_g = (struct win_geometry){
-	    .x = g->x,
-	    .y = g->y,
-	    .width = g->width,
-	    .height = g->height,
-	    .border_width = g->border_width,
-	};
-
-	free(g);
-
-	// Create Damage for window (if not Input Only)
-	new->damage = x_new_id(ps->c);
-	e = xcb_request_check(
-	    ps->c, xcb_damage_create_checked(ps->c, new->damage, w->id,
-	                                     XCB_DAMAGE_REPORT_LEVEL_NON_EMPTY));
-	if (e) {
-		log_error_x_error(e, "Failed to create damage");
-		free(e);
-		free(new);
-		return w;
-	}
-
-	// Set window event mask
-	xcb_change_window_attributes(
-	    ps->c, new->base.id, XCB_CW_EVENT_MASK,
-	    (const uint32_t[]){determine_evmask(ps, new->base.id, WIN_EVMODE_FRAME)});
-
-	// Get notification when the shape of a window changes
-	if (ps->shape_exists) {
-		xcb_shape_select_input(ps->c, new->base.id, 1);
-	}
-
-	new->pictfmt = x_get_pictform_for_visual(ps->c, new->a.visual);
-	new->client_pictfmt = NULL;
-
-	list_replace(&w->stack_neighbour, &new->base.stack_neighbour);
-	struct win *replaced = NULL;
-	HASH_REPLACE_INT(ps->windows, id, &new->base, replaced);
-	assert(replaced == w);
-	free(w);
-
-	// Set all the stale flags on this new window, so it's properties will get updated
-	// when it's mapped
-	win_set_flags(new, WIN_FLAGS_CLIENT_STALE | WIN_FLAGS_SIZE_STALE |
-	                       WIN_FLAGS_POSITION_STALE | WIN_FLAGS_PROPERTY_STALE |
-	                       WIN_FLAGS_FACTOR_CHANGED);
-	xcb_atom_t init_stale_props[] = {
-	    ps->atoms->a_NET_WM_WINDOW_TYPE, ps->atoms->a_NET_WM_WINDOW_OPACITY,
-	    ps->atoms->a_NET_FRAME_EXTENTS,  ps->atoms->aWM_NAME,
-	    ps->atoms->a_NET_WM_NAME,        ps->atoms->aWM_CLASS,
-	    ps->atoms->aWM_WINDOW_ROLE,      ps->atoms->a_COMPTON_SHADOW,
-	    ps->atoms->aWM_CLIENT_LEADER,    ps->atoms->aWM_TRANSIENT_FOR,
-	};
-	win_set_properties_stale(new, init_stale_props, ARR_SIZE(init_stale_props));
-
-#ifdef CONFIG_DBUS
-	// Send D-Bus signal
-	if (ps->o.dbus) {
-		cdbus_ev_win_added(ps, &new->base);
-	}
-#endif
-	return &new->base;
-}
-
-/**
- * Set leader of a window.
- */
-static inline void win_set_leader(session_t *ps, struct managed_win *w, xcb_window_t nleader) {
-	// If the leader changes
-	if (w->leader != nleader) {
-		xcb_window_t cache_leader_old = win_get_leader(ps, w);
-
-		w->leader = nleader;
-
-		// Forcefully do this to deal with the case when a child window
-		// gets mapped before parent, or when the window is a waypoint
-		clear_cache_win_leaders(ps);
-
-		// Update the old and new window group and active_leader if the window
-		// could affect their state.
-		xcb_window_t cache_leader = win_get_leader(ps, w);
-		if (win_is_focused_raw(ps, w) && cache_leader_old != cache_leader) {
-			ps->active_leader = cache_leader;
-
-			group_on_factor_change(ps, cache_leader_old);
-			group_on_factor_change(ps, cache_leader);
-		}
-
-		// Update everything related to conditions
-		win_on_factor_change(ps, w);
-	}
-}
-
-/**
- * Update leader of a window.
- */
-void win_update_leader(session_t *ps, struct managed_win *w) {
-	xcb_window_t leader = XCB_NONE;
-
-	// Read the leader properties
-	if (ps->o.detect_transient && !leader) {
-		leader =
-		    wid_get_prop_window(ps->c, w->client_win, ps->atoms->aWM_TRANSIENT_FOR);
-	}
-
-	if (ps->o.detect_client_leader && !leader) {
-		leader =
-		    wid_get_prop_window(ps->c, w->client_win, ps->atoms->aWM_CLIENT_LEADER);
-	}
-
-	win_set_leader(ps, w, leader);
-
-	log_trace("(%#010x): client %#010x, leader %#010x, cache %#010x", w->base.id,
-	          w->client_win, w->leader, win_get_leader(ps, w));
-}
-
-/**
- * Internal function of win_get_leader().
- */
-static xcb_window_t win_get_leader_raw(session_t *ps, struct managed_win *w, int recursions) {
-	// Rebuild the cache if needed
-	if (!w->cache_leader && (w->client_win || w->leader)) {
-		// Leader defaults to client window
-		if (!(w->cache_leader = w->leader))
-			w->cache_leader = w->client_win;
-
-		// If the leader of this window isn't itself, look for its ancestors
-		if (w->cache_leader && w->cache_leader != w->client_win) {
-			auto wp = find_toplevel(ps, w->cache_leader);
-			if (wp) {
-				// Dead loop?
-				if (recursions > WIN_GET_LEADER_MAX_RECURSION)
-					return XCB_NONE;
-
-				w->cache_leader = win_get_leader_raw(ps, wp, recursions + 1);
-			}
-		}
-	}
-
-	return w->cache_leader;
-}
-
-/**
- * Retrieve the <code>WM_CLASS</code> of a window and update its
- * <code>win</code> structure.
- */
-bool win_update_class(session_t *ps, struct managed_win *w) {
-	char **strlst = NULL;
-	int nstr = 0;
-
-	// Can't do anything if there's no client window
-	if (!w->client_win)
-		return false;
-
-	// Free and reset old strings
-	free(w->class_instance);
-	free(w->class_general);
-	w->class_instance = NULL;
-	w->class_general = NULL;
-
-	// Retrieve the property string list
-	if (!wid_get_text_prop(ps, w->client_win, ps->atoms->aWM_CLASS, &strlst, &nstr)) {
-		return false;
-	}
-
-	// Copy the strings if successful
-	w->class_instance = strdup(strlst[0]);
-
-	if (nstr > 1) {
-		w->class_general = strdup(strlst[1]);
-	}
-
-	free(strlst);
-
-	log_trace("(%#010x): client = %#010x, "
-	          "instance = \"%s\", general = \"%s\"",
-	          w->base.id, w->client_win, w->class_instance, w->class_general);
-
-	return true;
-}
-
-/**
- * Handle window focus change.
- */
-static void win_on_focus_change(session_t *ps, struct managed_win *w) {
-	// If window grouping detection is enabled
-	if (ps->o.track_leader) {
-		xcb_window_t leader = win_get_leader(ps, w);
-
-		// If the window gets focused, replace the old active_leader
-		if (win_is_focused_raw(ps, w) && leader != ps->active_leader) {
-			xcb_window_t active_leader_old = ps->active_leader;
-
-			ps->active_leader = leader;
-
-			group_on_factor_change(ps, active_leader_old);
-			group_on_factor_change(ps, leader);
-		}
-		// If the group get unfocused, remove it from active_leader
-		else if (!win_is_focused_raw(ps, w) && leader &&
-		         leader == ps->active_leader && !group_is_focused(ps, leader)) {
-			ps->active_leader = XCB_NONE;
-			group_on_factor_change(ps, leader);
-		}
-	}
-
-	// Update everything related to conditions
-	win_on_factor_change(ps, w);
-
-#ifdef CONFIG_DBUS
-	// Send D-Bus signal
-	if (ps->o.dbus) {
-		if (win_is_focused_raw(ps, w)) {
-			cdbus_ev_win_focusin(ps, &w->base);
-		} else {
-			cdbus_ev_win_focusout(ps, &w->base);
-		}
-	}
-#endif
-}
-
-/**
- * Set real focused state of a window.
- */
-void win_set_focused(session_t *ps, struct managed_win *w) {
-	// Unmapped windows will have their focused state reset on map
-	if (w->a.map_state != XCB_MAP_STATE_VIEWABLE) {
-		return;
-	}
-
-	if (win_is_focused_raw(ps, w)) {
-		return;
-	}
-
-	auto old_active_win = ps->active_win;
-	ps->active_win = w;
-	assert(win_is_focused_raw(ps, w));
-
-	if (old_active_win) {
-		win_on_focus_change(ps, old_active_win);
-	}
-	win_on_focus_change(ps, w);
-}
-
-/**
- * Get a rectangular region a window (and possibly its shadow) occupies.
- *
- * Note w->shadow and shadow geometry must be correct before calling this
- * function.
- */
-void win_extents(const struct managed_win *w, region_t *res) {
-	pixman_region32_clear(res);
-	pixman_region32_union_rect(res, res, w->g.x, w->g.y, (uint)w->widthb, (uint)w->heightb);
-
-	if (w->shadow) {
-		assert(w->shadow_width >= 0 && w->shadow_height >= 0);
-		pixman_region32_union_rect(res, res, w->g.x + w->shadow_dx,
-		                           w->g.y + w->shadow_dy, (uint)w->shadow_width,
-		                           (uint)w->shadow_height);
-	}
-}
-
-gen_by_val(win_extents);
-
-/**
- * Update the out-dated bounding shape of a window.
- *
- * Mark the window shape as updated
- */
-void win_update_bounding_shape(session_t *ps, struct managed_win *w) {
-	if (ps->shape_exists) {
-		w->bounding_shaped = win_bounding_shaped(ps, w->base.id);
-	}
-
-	// We don't handle property updates of non-visible windows until they are mapped.
-	assert(w->state != WSTATE_UNMAPPED && w->state != WSTATE_DESTROYING &&
-	       w->state != WSTATE_UNMAPPING);
-
-	pixman_region32_clear(&w->bounding_shape);
-	// Start with the window rectangular region
-	win_get_region_local(w, &w->bounding_shape);
-
-	// Only request for a bounding region if the window is shaped
-	// (while loop is used to avoid goto, not an actual loop)
-	while (w->bounding_shaped) {
-		/*
-		 * if window doesn't exist anymore,  this will generate an error
-		 * as well as not generate a region.
-		 */
-
-		xcb_shape_get_rectangles_reply_t *r = xcb_shape_get_rectangles_reply(
-		    ps->c,
-		    xcb_shape_get_rectangles(ps->c, w->base.id, XCB_SHAPE_SK_BOUNDING), NULL);
-
-		if (!r) {
-			break;
-		}
-
-		xcb_rectangle_t *xrects = xcb_shape_get_rectangles_rectangles(r);
-		int nrects = xcb_shape_get_rectangles_rectangles_length(r);
-		rect_t *rects = from_x_rects(nrects, xrects);
-		free(r);
-
-		region_t br;
-		pixman_region32_init_rects(&br, rects, nrects);
-		free(rects);
-
-		// Add border width because we are using a different origin.
-		// X thinks the top left of the inner window is the origin
-		// (for the bounding shape, althought xcb_get_geometry thinks
-		//  the outer top left (outer means outside of the window
-		//  border) is the origin),
-		// We think the top left of the border is the origin
-		pixman_region32_translate(&br, w->g.border_width, w->g.border_width);
-
-		// Intersect the bounding region we got with the window rectangle, to
-		// make sure the bounding region is not bigger than the window
-		// rectangle
-		pixman_region32_intersect(&w->bounding_shape, &w->bounding_shape, &br);
-		pixman_region32_fini(&br);
-		break;
-	}
-
-	if (w->bounding_shaped && ps->o.detect_rounded_corners) {
-		w->rounded_corners = win_has_rounded_corners(w);
-	}
-
-	// Window shape changed, we should free old wpaint and shadow pict
-	// log_trace("free out dated pict");
-	win_set_flags(w, WIN_FLAGS_IMAGES_STALE);
-	ps->pending_updates = true;
-
-	free_paint(ps, &w->paint);
-	free_paint(ps, &w->shadow_paint);
-
-	win_on_factor_change(ps, w);
-}
-
-/**
- * Reread opacity property of a window.
- */
-void win_update_opacity_prop(session_t *ps, struct managed_win *w) {
-	// get frame opacity first
-	w->has_opacity_prop = wid_get_opacity_prop(ps, w->base.id, OPAQUE, &w->opacity_prop);
-
-	if (w->has_opacity_prop) {
-		// opacity found
-		return;
-	}
-
-	if (ps->o.detect_client_opacity && w->client_win && w->base.id == w->client_win) {
-		// checking client opacity not allowed
-		return;
-	}
-
-	// get client opacity
-	w->has_opacity_prop =
-	    wid_get_opacity_prop(ps, w->client_win, OPAQUE, &w->opacity_prop);
-}
-
-/**
- * Retrieve frame extents from a window.
- */
-void win_update_frame_extents(session_t *ps, struct managed_win *w, xcb_window_t client) {
-	winprop_t prop = x_get_prop(ps->c, client, ps->atoms->a_NET_FRAME_EXTENTS, 4L,
-	                            XCB_ATOM_CARDINAL, 32);
-
-	if (prop.nitems == 4) {
-		int extents[4];
-		for (int i = 0; i < 4; i++) {
-			if (prop.c32[i] > (uint32_t)INT_MAX) {
-				log_warn("Your window manager sets a absurd "
-				         "_NET_FRAME_EXTENTS value (%u), ignoring it.",
-				         prop.c32[i]);
-				memset(extents, 0, sizeof(extents));
-				break;
-			}
-			extents[i] = (int)prop.c32[i];
-		}
-
-		const bool changed = w->frame_extents.left != extents[0] ||
-		                     w->frame_extents.right != extents[1] ||
-		                     w->frame_extents.top != extents[2] ||
-		                     w->frame_extents.bottom != extents[3];
-		w->frame_extents.left = extents[0];
-		w->frame_extents.right = extents[1];
-		w->frame_extents.top = extents[2];
-		w->frame_extents.bottom = extents[3];
-
-		// If frame_opacity != 1, then frame of this window
-		// is not included in reg_ignore of underneath windows
-		if (ps->o.frame_opacity == 1 && changed) {
-			w->reg_ignore_valid = false;
-		}
-	}
-
-	log_trace("(%#010x): %d, %d, %d, %d", w->base.id, w->frame_extents.left,
-	          w->frame_extents.right, w->frame_extents.top, w->frame_extents.bottom);
-
-	free_winprop(&prop);
-}
-
-bool win_is_region_ignore_valid(session_t *ps, const struct managed_win *w) {
-	win_stack_foreach_managed(i, &ps->window_stack) {
-		if (i == w) {
-			break;
-		}
-		if (!i->reg_ignore_valid) {
-			return false;
-		}
-	}
-	return true;
-}
-
-/**
- * Stop listening for events on a particular window.
- */
-void win_ev_stop(session_t *ps, const struct win *w) {
-	xcb_change_window_attributes(ps->c, w->id, XCB_CW_EVENT_MASK, (const uint32_t[]){0});
-
-	if (!w->managed) {
-		return;
-	}
-
-	auto mw = (struct managed_win *)w;
-	if (mw->client_win) {
-		xcb_change_window_attributes(ps->c, mw->client_win, XCB_CW_EVENT_MASK,
-		                             (const uint32_t[]){0});
-	}
-
-	if (ps->shape_exists) {
-		xcb_shape_select_input(ps->c, w->id, 0);
-	}
-}
-
-/// Finish the unmapping of a window (e.g. after fading has finished).
-/// Doesn't free `w`
-static void unmap_win_finish(session_t *ps, struct managed_win *w) {
-	w->reg_ignore_valid = false;
-	w->state = WSTATE_UNMAPPED;
-
-	// We are in unmap_win, this window definitely was viewable
-	if (ps->backend_data) {
-		// Only the pixmap needs to be freed and reacquired when mapping.
-		// Shadow image can be preserved.
-		if (!win_check_flags_all(w, WIN_FLAGS_PIXMAP_NONE)) {
-			win_release_pixmap(ps->backend_data, w);
-			win_release_oldpixmap(ps->backend_data, w);
-		}
-	} else {
-		assert(!w->win_image);
-		assert(!w->old_win_image);
-		assert(!w->shadow_image);
-	}
-
-	// Force animation to completed position
-	w->animation_velocity_x = 0;
-	w->animation_velocity_y = 0;
-	w->animation_velocity_w = 0;
-	w->animation_velocity_h = 0;
-	w->animation_progress = 1.0;
-
-	free_paint(ps, &w->paint);
-	free_paint(ps, &w->shadow_paint);
-
-	// Try again at binding images when the window is mapped next time
-	win_clear_flags(w, WIN_FLAGS_IMAGE_ERROR);
-
-	// Flag window so that it gets animated when it reapears 
-	// in case it wasn't destroyed
-	win_set_flags(w, WIN_FLAGS_POSITION_STALE);
-	win_set_flags(w, WIN_FLAGS_SIZE_STALE);
-}
-
-/// Finish the destruction of a window (e.g. after fading has finished).
-/// Frees `w`
-static void destroy_win_finish(session_t *ps, struct win *w) {
-	log_trace("Trying to finish destroying (%#010x)", w->id);
-
-	auto next_w = win_stack_find_next_managed(ps, &w->stack_neighbour);
-	list_remove(&w->stack_neighbour);
-
-	if (w->managed) {
-		auto mw = (struct managed_win *)w;
-
-		if (mw->state != WSTATE_UNMAPPED) {
-			// Only UNMAPPED state has window resources freed, otherwise
-			// we need to call unmap_win_finish to free them.
-			// XXX actually we unmap_win_finish only frees the rendering
-			//     resources, we still need to call free_win_res. will fix
-			//     later.
-			unmap_win_finish(ps, mw);
-		}
-
-		// Unmapping preserves the shadow image, so free it here
-		if (!win_check_flags_all(mw, WIN_FLAGS_SHADOW_NONE)) {
-			assert(mw->shadow_image != NULL);
-			win_release_shadow(ps->backend_data, mw);
-		}
-
-		// Invalidate reg_ignore of windows below this one
-		// TODO(yshui) what if next_w is not mapped??
-		/* TODO(yshui) seriously figure out how reg_ignore behaves.
-		 * I think if `w` is unmapped, and destroyed after
-		 * paint happened at least once, w->reg_ignore_valid would
-		 * be true, and there is no need to invalid w->next->reg_ignore
-		 * when w is destroyed. */
-		if (next_w) {
-			rc_region_unref(&next_w->reg_ignore);
-			next_w->reg_ignore_valid = false;
-		}
-
-		if (mw == ps->active_win) {
-			// Usually, the window cannot be the focused at destruction.
-			// FocusOut should be generated before the window is destroyed. We
-			// do this check just to be completely sure we don't have dangling
-			// references.
-			log_debug("window %#010x (%s) is destroyed while being focused",
-			          w->id, mw->name);
-			ps->active_win = NULL;
-		}
-
-		free_win_res(ps, mw);
-
-		// Drop w from all prev_trans to avoid accessing freed memory in
-		// repair_win()
-		// TODO(yshui) there can only be one prev_trans pointing to w
-		win_stack_foreach_managed(w2, &ps->window_stack) {
-			if (mw == w2->prev_trans) {
-				w2->prev_trans = NULL;
-			}
-		}
-	}
-
-	free(w);
-}
-
-static void map_win_finish(struct managed_win *w) {
-	w->in_openclose = false;
-	w->state = WSTATE_MAPPED;
-}
-
-/// Move window `w` so it's before `next` in the list
-static inline void restack_win(session_t *ps, struct win *w, struct list_node *next) {
-	struct managed_win *mw = NULL;
-	if (w->managed) {
-		mw = (struct managed_win *)w;
-	}
-
-	if (mw) {
-		// This invalidates all reg_ignore below the new stack position of `w`
-		mw->reg_ignore_valid = false;
-		rc_region_unref(&mw->reg_ignore);
-
-		// This invalidates all reg_ignore below the old stack position of `w`
-		auto next_w = win_stack_find_next_managed(ps, &w->stack_neighbour);
-		if (next_w) {
-			next_w->reg_ignore_valid = false;
-			rc_region_unref(&next_w->reg_ignore);
-		}
-	}
-
-	list_move_before(&w->stack_neighbour, next);
-
-	// add damage for this window
-	if (mw) {
-		add_damage_from_win(ps, mw);
-	}
-
-#ifdef DEBUG_RESTACK
-	log_trace("Window stack modified. Current stack:");
-	for (auto c = ps->list; c; c = c->next) {
-		const char *desc = "";
-		if (c->state == WSTATE_DESTROYING) {
-			desc = "(D) ";
-		}
-		log_trace("%#010x \"%s\" %s", c->id, c->name, desc);
-	}
-#endif
-}
-
-/// Move window `w` so it's right above `below`
-void restack_above(session_t *ps, struct win *w, xcb_window_t below) {
-	xcb_window_t old_below;
-
-	if (!list_node_is_last(&ps->window_stack, &w->stack_neighbour)) {
-		old_below = list_next_entry(w, stack_neighbour)->id;
-	} else {
-		old_below = XCB_NONE;
-	}
-	log_debug("Restack %#010x (%s), old_below: %#010x, new_below: %#010x", w->id,
-	          win_get_name_if_managed(w), old_below, below);
-
-	if (old_below != below) {
-		struct list_node *new_next;
-		if (!below) {
-			new_next = &ps->window_stack;
-		} else {
-			struct win *tmp_w = NULL;
-			HASH_FIND_INT(ps->windows, &below, tmp_w);
-
-			if (!tmp_w) {
-				log_error("Failed to found new below window %#010x.", below);
-				return;
-			}
-
-			new_next = &tmp_w->stack_neighbour;
-		}
-		restack_win(ps, w, new_next);
-	}
-}
-
-void restack_bottom(session_t *ps, struct win *w) {
-	restack_above(ps, w, 0);
-}
-
-void restack_top(session_t *ps, struct win *w) {
-	log_debug("Restack %#010x (%s) to top", w->id, win_get_name_if_managed(w));
-	if (&w->stack_neighbour == ps->window_stack.next) {
-		// already at top
-		return;
-	}
-	restack_win(ps, w, ps->window_stack.next);
-}
-
-/// Start destroying a window. Windows cannot always be destroyed immediately
-/// because of fading and such.
-///
-/// @return whether the window has finished destroying and is freed
-bool destroy_win_start(session_t *ps, struct win *w) {
-	auto mw = (struct managed_win *)w;
-	assert(w);
-
-	log_debug("Destroying %#010x \"%s\", managed = %d", w->id,
-	          (w->managed ? mw->name : NULL), w->managed);
-
-	// Delete destroyed window from the hash table, even though the window might still
-	// be rendered for a while. We need to make sure future window with the same
-	// window id won't confuse us. Keep the window in the window stack if it's managed
-	// and mapped, since we might still need to render it (e.g. fading out). Window
-	// will be removed from the stack when it finishes destroying.
-	HASH_DEL(ps->windows, w);
-
-	if (!w->managed || mw->state == WSTATE_UNMAPPED) {
-		// Window is already unmapped, or is an unmanged window, just destroy it
-		destroy_win_finish(ps, w);
-		return true;
-	}
-
-	if (w->managed) {
-		// Clear IMAGES_STALE flags since the window is destroyed: Clear
-		// PIXMAP_STALE as there is no pixmap available anymore, so STALE doesn't
-		// make sense.
-		// XXX Clear SHADOW_STALE as setting/clearing flags on a destroyed window
-		// doesn't work leading to an inconsistent state where the shadow is
-		// refreshed but the flags are stuck in STALE.
-		// Do this before changing the window state to destroying
-		win_clear_flags(mw, WIN_FLAGS_IMAGES_STALE);
-
-		// If size/shape/position information is stale, win_process_update_flags
-		// will update them and add the new window extents to damage. Since the
-		// window has been destroyed, we cannot get the complete information at
-		// this point, so we just add what we currently have to the damage.
-		if (win_check_flags_any(mw, WIN_FLAGS_SIZE_STALE | WIN_FLAGS_POSITION_STALE)) {
-			add_damage_from_win(ps, mw);
-		}
-
-		// Clear some flags about stale window information. Because now the window
-		// is destroyed, we can't update them anyway.
-		win_clear_flags(mw, WIN_FLAGS_SIZE_STALE | WIN_FLAGS_POSITION_STALE |
-		                        WIN_FLAGS_PROPERTY_STALE |
-		                        WIN_FLAGS_FACTOR_CHANGED | WIN_FLAGS_CLIENT_STALE);
-
-		// Update state flags of a managed window
-		mw->state = WSTATE_DESTROYING;
-		mw->a.map_state = XCB_MAP_STATE_UNMAPPED;
-		mw->in_openclose = true;
-	}
-
-	// don't need win_ev_stop because the window is gone anyway
-#ifdef CONFIG_DBUS
-	// Send D-Bus signal
-	if (ps->o.dbus) {
-		cdbus_ev_win_destroyed(ps, w);
-	}
-#endif
-
-	if (!ps->redirected) {
-		// Skip transition if we are not rendering
-		return win_skip_fading(ps, mw);
-	}
-
-	return false;
-}
-
-void unmap_win_start(session_t *ps, struct managed_win *w) {
-	assert(w);
-	assert(w->base.managed);
-	assert(w->a._class != XCB_WINDOW_CLASS_INPUT_ONLY);
-
-	log_debug("Unmapping %#010x \"%s\"", w->base.id, w->name);
-
-	if (unlikely(w->state == WSTATE_DESTROYING)) {
-		log_warn("Trying to undestroy a window?");
-		assert(false);
-	}
-
-	bool was_damaged = w->ever_damaged;
-	w->ever_damaged = false;
-
-	if (unlikely(w->state == WSTATE_UNMAPPING || w->state == WSTATE_UNMAPPED)) {
-		if (win_check_flags_all(w, WIN_FLAGS_MAPPED)) {
-			// Clear the pending map as this window is now unmapped
-			win_clear_flags(w, WIN_FLAGS_MAPPED);
-		} else {
-			log_warn("Trying to unmapping an already unmapped window %#010x "
-			         "\"%s\"",
-			         w->base.id, w->name);
-			assert(false);
-		}
-		return;
-	}
-
-	// Note we don't update focused window here. This will either be
-	// triggered by subsequence Focus{In, Out} event, or by recheck_focus
-
-	w->a.map_state = XCB_MAP_STATE_UNMAPPED;
-	w->state = WSTATE_UNMAPPING;
-	w->opacity_target_old = fmax(w->opacity_target, w->opacity_target_old);
-	w->opacity_target = win_calc_opacity_target(ps, w);
-
-	if (ps->o.animations &&
-		ps->o.animation_for_unmap_window != OPEN_WINDOW_ANIMATION_NONE &&
-		ps->o.wintype_option[w->window_type].animation != 0) 
-	{
-		init_animation_unmap(ps, w);
-
-		double x_dist = w->animation_dest_center_x - w->animation_center_x;
-		double y_dist = w->animation_dest_center_y - w->animation_center_y;
-		double w_dist = w->animation_dest_w - w->animation_w;
-		double h_dist = w->animation_dest_h - w->animation_h;
-		w->animation_inv_og_distance =
-			1.0 / sqrt(x_dist * x_dist + y_dist * y_dist +
-						w_dist * w_dist + h_dist * h_dist);
-
-		if (isinf(w->animation_inv_og_distance))
-			w->animation_inv_og_distance = 0;
-
-		w->animation_progress = 0.0;
-
-		if (w->old_win_image) {
-			ps->backend_data->ops->release_image(ps->backend_data,
-												w->old_win_image);
-			w->old_win_image = NULL;
-		}
-	}
-
-#ifdef CONFIG_DBUS
-	// Send D-Bus signal
-	if (ps->o.dbus) {
-		cdbus_ev_win_unmapped(ps, &w->base);
-	}
-#endif
-
-	if (!ps->redirected || !was_damaged) {
-		// If we are not redirected, we skip fading because we aren't rendering
-		// anything anyway.
-		// If the window wasn't ever damaged, it shouldn't be painted either. But
-		// a fading out window is always painted, so we have to skip fading here.
-		CHECK(!win_skip_fading(ps, w));
-	}
-}
-
-/**
- * Execute fade callback of a window if fading finished.
- *
- * @return whether the window is destroyed and freed
- */
-bool win_check_fade_finished(session_t *ps, struct managed_win *w) {
-	if (w->state == WSTATE_MAPPED || w->state == WSTATE_UNMAPPED) {
-		// No fading in progress
-		assert(w->opacity_target == w->opacity);
-		return false;
-	}
-
-	if (w->opacity == w->opacity_target) {
-		switch (w->state) {
-		case WSTATE_UNMAPPING: unmap_win_finish(ps, w); return false;
-		case WSTATE_DESTROYING: destroy_win_finish(ps, &w->base); return true;
-		case WSTATE_MAPPING: map_win_finish(w); return false;
-		case WSTATE_FADING: w->state = WSTATE_MAPPED; break;
-		default: unreachable;
-		}
-	}
-
-	return false;
-}
-
-/// Skip the current in progress fading of window,
-/// transition the window straight to its end state
-///
-/// @return whether the window is destroyed and freed
-bool win_skip_fading(session_t *ps, struct managed_win *w) {
-	if (w->state == WSTATE_MAPPED || w->state == WSTATE_UNMAPPED) {
-		assert(w->opacity_target == w->opacity);
-		return false;
-	}
-	log_debug("Skipping fading process of window %#010x (%s)", w->base.id, w->name);
-	w->opacity = w->opacity_target;
-
-	if (w->animation_progress < 1) {
-		w->animation_progress = 1;
-		w->g.x = w->pending_g.x;
-		w->g.y = w->pending_g.y;
-		w->g.width = w->pending_g.width;
-		w->g.height = w->pending_g.height;
-	}
-
-	return win_check_fade_finished(ps, w);
-}
-
-/**
- * Get the Xinerama screen a window is on.
- *
- * Return an index >= 0, or -1 if not found.
- *
- * TODO(yshui) move to x.c
- * TODO(yshui) use xrandr
- */
-void win_update_screen(int nscreens, region_t *screens, struct managed_win *w) {
-	w->xinerama_scr = -1;
-
-	for (int i = 0; i < nscreens; i++) {
-		auto e = pixman_region32_extents(&screens[i]);
-		if (e->x1 <= w->g.x && e->y1 <= w->g.y && e->x2 >= w->g.x + w->widthb &&
-		    e->y2 >= w->g.y + w->heightb) {
-			w->xinerama_scr = i;
-			log_debug("Window %#010x (%s), %dx%d+%dx%d, is on screen %d "
-			          "(%dx%d+%dx%d)",
-			          w->base.id, w->name, w->g.x, w->g.y, w->widthb, w->heightb,
-			          i, e->x1, e->y1, e->x2 - e->x1, e->y2 - e->y1);
-			return;
-		}
-	}
-	log_debug("Window %#010x (%s), %dx%d+%dx%d, is not contained by any screen",
-	          w->base.id, w->name, w->g.x, w->g.y, w->g.width, w->g.height);
-}
-
-/// Map an already registered window
-void map_win_start(session_t *ps, struct managed_win *w) {
-	assert(ps->server_grabbed);
-	assert(w);
-
-	// Don't care about window mapping if it's an InputOnly window
-	// Also, try avoiding mapping a window twice
-	if (w->a._class == XCB_WINDOW_CLASS_INPUT_ONLY) {
-		return;
-	}
-
-	log_debug("Mapping (%#010x \"%s\")", w->base.id, w->name);
-
-	assert(w->state != WSTATE_DESTROYING);
-	if (w->state != WSTATE_UNMAPPED && w->state != WSTATE_UNMAPPING) {
-		log_warn("Mapping an already mapped window");
-		return;
-	}
-
-	if (w->state == WSTATE_UNMAPPING) {
-		CHECK(!win_skip_fading(ps, w));
-		// We skipped the unmapping process, the window was rendered, now it is
-		// not anymore. So we need to mark the then unmapping window as damaged.
-		//
-		// Solves problem when, for example, a window is unmapped then mapped in a
-		// different location
-		add_damage_from_win(ps, w);
-		assert(w);
-	}
-
-	assert(w->state == WSTATE_UNMAPPED);
-
-	// Rant: window size could change after we queried its geometry here and before
-	// we get its pixmap. Later, when we get back to the event processing loop, we
-	// will get the notification about size change from Xserver and try to refresh the
-	// pixmap, while the pixmap is actually already up-to-date (i.e. the notification
-	// is stale). There is basically no real way to prevent this, aside from grabbing
-	// the server.
-
-	// XXX Can we assume map_state is always viewable?
-	w->a.map_state = XCB_MAP_STATE_VIEWABLE;
-
-	// Update window mode here to check for ARGB windows
-	w->mode = win_calc_mode(w);
-
-	log_debug("Window (%#010x) has type %s", w->base.id, WINTYPES[w->window_type]);
-
-	// XXX We need to make sure that win_data is available
-	// iff `state` is MAPPED
-	w->state = WSTATE_MAPPING;
-	w->opacity_target_old = 0;
-	w->opacity_target = win_calc_opacity_target(ps, w);
-
-	log_debug("Window %#010x has opacity %f, opacity target is %f", w->base.id,
-	          w->opacity, w->opacity_target);
-
-	// Cannot set w->ever_damaged = false here, since window mapping could be
-	// delayed, so a damage event might have already arrived before this function
-	// is called. But this should be unnecessary in the first place, since
-	// ever_damaged is set to false in unmap_win_finish anyway.
-
-	// Sets the WIN_FLAGS_IMAGES_STALE flag so later in the critical section
-	// the window's image will be bound
-
-	win_set_flags(w, WIN_FLAGS_PIXMAP_STALE);
-
-#ifdef CONFIG_DBUS
-	// Send D-Bus signal
-	if (ps->o.dbus) {
-		cdbus_ev_win_mapped(ps, &w->base);
-	}
-#endif
-
-	if (!ps->redirected) {
-		CHECK(!win_skip_fading(ps, w));
-	}
-}
-
-/**
- * Update target window opacity depending on the current state.
- */
-void win_update_opacity_target(session_t *ps, struct managed_win *w) {
-	auto opacity_target_old = w->opacity_target;
-	w->opacity_target = win_calc_opacity_target(ps, w);
-
-	if (opacity_target_old == w->opacity_target) {
-		return;
-	}
-
-	if (w->state == WSTATE_MAPPED) {
-		// Opacity target changed while MAPPED. Transition to FADING.
-		assert(w->opacity == opacity_target_old);
-		w->opacity_target_old = opacity_target_old;
-		w->state = WSTATE_FADING;
-		log_debug("Window %#010x (%s) opacity %f, opacity target %f, set "
-		          "old target %f",
-		          w->base.id, w->name, w->opacity, w->opacity_target,
-		          w->opacity_target_old);
-	} else if (w->state == WSTATE_MAPPING) {
-		// Opacity target changed while fading in.
-		if (w->opacity >= w->opacity_target) {
-			// Already reached new target opacity. Transition to
-			// FADING.
-			map_win_finish(w);
-			w->opacity_target_old = fmax(opacity_target_old, w->opacity);
-			w->state = WSTATE_FADING;
-			log_debug("Window %#010x (%s) opacity %f already reached "
-			          "new opacity target %f while mapping, set old "
-			          "target %f",
-			          w->base.id, w->name, w->opacity, w->opacity_target,
-			          w->opacity_target_old);
-		}
-	} else if (w->state == WSTATE_FADING) {
-		// Opacity target changed while FADING.
-		if ((w->opacity < opacity_target_old && w->opacity > w->opacity_target) ||
-		    (w->opacity > opacity_target_old && w->opacity < w->opacity_target)) {
-			// Changed while fading in and will fade out or while
-			// fading out and will fade in.
-			w->opacity_target_old = opacity_target_old;
-			log_debug("Window %#010x (%s) opacity %f already reached "
-			          "new opacity target %f while fading, set "
-			          "old target %f",
-			          w->base.id, w->name, w->opacity, w->opacity_target,
-			          w->opacity_target_old);
-		}
-	}
-
-	if (!ps->redirected) {
-		CHECK(!win_skip_fading(ps, w));
-	}
-}
-
-/**
- * Find a managed window from window id in window linked list of the session.
- */
-struct win *find_win(session_t *ps, xcb_window_t id) {
-	if (!id) {
-		return NULL;
-	}
-
-	struct win *w = NULL;
-	HASH_FIND_INT(ps->windows, &id, w);
-	assert(w == NULL || !w->destroyed);
-	return w;
-}
-
-/**
- * Find a managed window from window id in window linked list of the session.
- */
-struct managed_win *find_managed_win(session_t *ps, xcb_window_t id) {
-	struct win *w = find_win(ps, id);
-	if (!w || !w->managed) {
-		return NULL;
-	}
-
-	auto mw = (struct managed_win *)w;
-	assert(mw->state != WSTATE_DESTROYING);
-	return mw;
-}
-
-/**
- * Find out the WM frame of a client window using existing data.
- *
- * @param id window ID
- * @return struct win object of the found window, NULL if not found
- */
-struct managed_win *find_toplevel(session_t *ps, xcb_window_t id) {
-	if (!id) {
-		return NULL;
-	}
-
-	HASH_ITER2(ps->windows, w) {
-		assert(!w->destroyed);
-		if (!w->managed) {
-			continue;
-		}
-
-		auto mw = (struct managed_win *)w;
-		if (mw->client_win == id) {
-			return mw;
-		}
-	}
-
-	return NULL;
-}
-
-/**
- * Find a managed window that is, or is a parent of `wid`.
- *
- * @param ps current session
- * @param wid window ID
- * @return struct _win object of the found window, NULL if not found
- */
-struct managed_win *find_managed_window_or_parent(session_t *ps, xcb_window_t wid) {
-	// TODO(yshui) this should probably be an "update tree", then find_toplevel.
-	// current approach is a bit more "racy", as the server state might be ahead of
-	// our state
-	struct win *w = NULL;
-
-	// We traverse through its ancestors to find out the frame
-	// Using find_win here because if we found a unmanaged window we know about, we
-	// can stop early.
-	while (wid && wid != ps->root && !(w = find_win(ps, wid))) {
-		// xcb_query_tree probably fails if you run picom when X is somehow
-		// initializing (like add it in .xinitrc). In this case
-		// just leave it alone.
-		auto reply = xcb_query_tree_reply(ps->c, xcb_query_tree(ps->c, wid), NULL);
-		if (reply == NULL) {
-			break;
-		}
-
-		wid = reply->parent;
-		free(reply);
-	}
-
-	if (w == NULL || !w->managed) {
-		return NULL;
-	}
-
-	return (struct managed_win *)w;
-}
-
-/**
- * Check if a rectangle includes the whole screen.
- */
-static inline bool rect_is_fullscreen(const session_t *ps, int x, int y, int wid, int hei) {
-	return (x <= 0 && y <= 0 && (x + wid) >= ps->root_width && (y + hei) >= ps->root_height);
-}
-
-/**
- * Check if a window is fulscreen using EWMH
- *
- * TODO(yshui) cache this property
- */
-static inline bool
-win_is_fullscreen_xcb(xcb_connection_t *c, const struct atom *a, const xcb_window_t w) {
-	xcb_get_property_cookie_t prop =
-	    xcb_get_property(c, 0, w, a->a_NET_WM_STATE, XCB_ATOM_ATOM, 0, 12);
-	xcb_get_property_reply_t *reply = xcb_get_property_reply(c, prop, NULL);
-	if (!reply) {
-		return false;
-	}
-
-	if (reply->length) {
-		xcb_atom_t *val = xcb_get_property_value(reply);
-		for (uint32_t i = 0; i < reply->length; i++) {
-			if (val[i] != a->a_NET_WM_STATE_FULLSCREEN) {
-				continue;
-			}
-			free(reply);
-			return true;
-		}
-	}
-	free(reply);
-	return false;
-}
-
-/// Set flags on a window. Some sanity checks are performed
-void win_set_flags(struct managed_win *w, uint64_t flags) {
-	log_debug("Set flags %" PRIu64 " to window %#010x (%s)", flags, w->base.id, w->name);
-	if (unlikely(w->state == WSTATE_DESTROYING)) {
-		log_error("Flags set on a destroyed window %#010x (%s)", w->base.id, w->name);
-		return;
-	}
-
-	w->flags |= flags;
-}
-
-/// Clear flags on a window. Some sanity checks are performed
-void win_clear_flags(struct managed_win *w, uint64_t flags) {
-	log_debug("Clear flags %" PRIu64 " from window %#010x (%s)", flags, w->base.id,
-	          w->name);
-	if (unlikely(w->state == WSTATE_DESTROYING)) {
-		log_warn("Flags cleared on a destroyed window %#010x (%s)", w->base.id,
-		         w->name);
-		return;
-	}
-
-	w->flags = w->flags & (~flags);
-}
-
-void win_set_properties_stale(struct managed_win *w, const xcb_atom_t *props, int nprops) {
-	const auto bits_per_element = sizeof(*w->stale_props) * 8;
-	size_t new_capacity = w->stale_props_capacity;
-
-	// Calculate the new capacity of the properties array
-	for (int i = 0; i < nprops; i++) {
-		if (props[i] >= new_capacity * bits_per_element) {
-			new_capacity = props[i] / bits_per_element + 1;
-		}
-	}
-
-	// Reallocate if necessary
-	if (new_capacity > w->stale_props_capacity) {
-		w->stale_props =
-		    realloc(w->stale_props, new_capacity * sizeof(*w->stale_props));
-
-		// Clear the content of the newly allocated bytes
-		memset(w->stale_props + w->stale_props_capacity, 0,
-		       (new_capacity - w->stale_props_capacity) * sizeof(*w->stale_props));
-		w->stale_props_capacity = new_capacity;
-	}
-
-	// Set the property bits
-	for (int i = 0; i < nprops; i++) {
-		w->stale_props[props[i] / bits_per_element] |=
-		    1UL << (props[i] % bits_per_element);
-	}
-	win_set_flags(w, WIN_FLAGS_PROPERTY_STALE);
-}
-
-static void win_clear_all_properties_stale(struct managed_win *w) {
-	memset(w->stale_props, 0, w->stale_props_capacity * sizeof(*w->stale_props));
-	win_clear_flags(w, WIN_FLAGS_PROPERTY_STALE);
-}
-
-static bool win_fetch_and_unset_property_stale(struct managed_win *w, xcb_atom_t prop) {
-	const auto bits_per_element = sizeof(*w->stale_props) * 8;
-	if (prop >= w->stale_props_capacity * bits_per_element) {
-		return false;
-	}
-
-	const auto mask = 1UL << (prop % bits_per_element);
-	bool ret = w->stale_props[prop / bits_per_element] & mask;
-	w->stale_props[prop / bits_per_element] &= ~mask;
-	return ret;
-}
-
-bool win_check_flags_any(struct managed_win *w, uint64_t flags) {
-	return (w->flags & flags) != 0;
-}
-
-bool win_check_flags_all(struct managed_win *w, uint64_t flags) {
-	return (w->flags & flags) == flags;
-}
-
-/**
- * Check if a window is a fullscreen window.
- *
- * It's not using w->border_size for performance measures.
- */
-bool win_is_fullscreen(const session_t *ps, const struct managed_win *w) {
-	if (!ps->o.no_ewmh_fullscreen &&
-	    win_is_fullscreen_xcb(ps->c, ps->atoms, w->client_win)) {
-		return true;
-	}
-	return rect_is_fullscreen(ps, w->g.x, w->g.y, w->widthb, w->heightb) &&
-	       (!w->bounding_shaped || w->rounded_corners);
-}
-
-/**
- * Check if a window has BYPASS_COMPOSITOR property set
- *
- * TODO(yshui) cache this property
- */
-bool win_is_bypassing_compositor(const session_t *ps, const struct managed_win *w) {
-	bool ret = false;
-
-	auto prop = x_get_prop(ps->c, w->client_win, ps->atoms->a_NET_WM_BYPASS_COMPOSITOR,
-	                       1L, XCB_ATOM_CARDINAL, 32);
-
-	if (prop.nitems && *prop.c32 == 1) {
-		ret = true;
-	}
-
-	free_winprop(&prop);
-	return ret;
-}
-
-/**
- * Check if a window is focused, without using any focus rules or forced focus settings
- */
-bool win_is_focused_raw(const session_t *ps, const struct managed_win *w) {
-	return w->a.map_state == XCB_MAP_STATE_VIEWABLE && ps->active_win == w;
-}
-
-// Find the managed window immediately below `i` in the window stack
-struct managed_win *
-win_stack_find_next_managed(const session_t *ps, const struct list_node *i) {
-	while (!list_node_is_last(&ps->window_stack, i)) {
-		auto next = list_entry(i->next, struct win, stack_neighbour);
-		if (next->managed) {
-			return (struct managed_win *)next;
-		}
-		i = &next->stack_neighbour;
-	}
-	return NULL;
-}
-
-/// Return whether this window is mapped on the X server side
-bool win_is_mapped_in_x(const struct managed_win *w) {
-	return w->state == WSTATE_MAPPING || w->state == WSTATE_FADING ||
-	       w->state == WSTATE_MAPPED || w->state == WSTATE_UNMAPPING ||
-	       w->state == WSTATE_DESTROYING || (w->flags & WIN_FLAGS_MAPPED);
-}