X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=restore.c;h=e7aead4ad5a698ba74f555ecd8b2e01bf1b10bd8;hb=a7821774c50aefa8c758b964814818b4634b77ce;hp=037496b27aa91b4da9de5c441c1b8d86e0d34fd2;hpb=f17cee7afdb710576f15d75b66e940bd26e9a4db;p=bspwm.git

diff --git a/restore.c b/restore.c
index 037496b..e7aead4 100644
--- a/restore.c
+++ b/restore.c
@@ -22,8 +22,10 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include "bspwm.h"
 #include "desktop.h"
 #include "ewmh.h"
@@ -34,255 +36,524 @@
 #include "tree.h"
 #include "settings.h"
 #include "restore.h"
+#include "window.h"
+#include "parse.h"
 
-void restore_tree(char *file_path)
+bool restore_tree(const char *file_path)
 {
-	if (file_path == NULL)
-		return;
+	size_t jslen;
+	char *json = read_string(file_path, &jslen);
 
-	FILE *snapshot = fopen(file_path, "r");
-	if (snapshot == NULL) {
-		warn("Restore tree: can't open '%s'.\n", file_path);
-		return;
+	if (json == NULL) {
+		return false;
 	}
 
-	char line[MAXLEN];
-	char name[MAXLEN];
-	coordinates_t loc;
-	monitor_t *m = NULL;
-	desktop_t *d = NULL;
-	node_t *n = NULL;
-	unsigned int level, last_level = 0;
-
-	while (fgets(line, sizeof(line), snapshot) != NULL) {
-		unsigned int len = strlen(line);
-		level = 0;
-
-		while (level < len && isspace(line[level]))
-			level++;
-
-		if (level == 0) {
-			int x, y, top, right, bottom, left;
-			unsigned int w, h;
-			char end = 0;
-			name[0] = '\0';
-			sscanf(line + level, "%s %ux%u%i%i %i,%i,%i,%i %c", name, &w, &h, &x, &y,
-			       &top, &right, &bottom, &left, &end);
-			m = find_monitor(name);
-			if (m == NULL)
-				continue;
-			m->rectangle = (xcb_rectangle_t) {x, y, w, h};
-			m->top_padding = top;
-			m->right_padding = right;
-			m->bottom_padding = bottom;
-			m->left_padding = left;
-			if (end != 0)
-				mon = m;
-		} else if (level == 1) {
-			if (m == NULL)
-				continue;
-			int wg, top, right, bottom, left;
-			unsigned int bw;
-			char floating, layout = 0, end = 0;
-			name[0] = '\0';
-			loc.desktop = NULL;
-			sscanf(line + level, "%s %u %i %i,%i,%i,%i %c %c %c", name,
-			       &bw, &wg, &top, &right, &bottom, &left, &layout, &floating, &end);
-			locate_desktop(name, &loc);
-			d = loc.desktop;
-			if (d == NULL) {
-				continue;
-			}
-			d->border_width = bw;
-			d->window_gap = wg;
-			d->top_padding = top;
-			d->right_padding = right;
-			d->bottom_padding = bottom;
-			d->left_padding = left;
-			if (layout == 'M') {
-				d->layout = LAYOUT_MONOCLE;
-			} else if (layout == 'T') {
-				d->layout = LAYOUT_TILED;
-			}
-			if (end != 0) {
-				m->desk = d;
-			}
+	int nbtok = 256;
+	jsmn_parser parser;
+	jsmntok_t *tokens = malloc(nbtok * sizeof(jsmntok_t));
+
+	if (tokens == NULL) {
+		perror("Restore tree: malloc");
+		free(json);
+		return false;
+	}
+
+	jsmn_init(&parser);
+	int ret;
+
+	while ((ret = jsmn_parse(&parser, json, jslen, tokens, nbtok)) == JSMN_ERROR_NOMEM) {
+		nbtok *= 2;
+		jsmntok_t *rtokens = realloc(tokens, nbtok * sizeof(jsmntok_t));
+		if (rtokens == NULL) {
+			perror("Restore tree: realloc");
+			free(tokens);
+			free(json);
+			return false;
 		} else {
-			if (m == NULL || d == NULL)
-				continue;
-			node_t *birth = make_node();
-			if (level == 2) {
-				empty_desktop(d);
-				d->root = birth;
-			} else if (n != NULL) {
-				if (level > last_level) {
-					n->first_child = birth;
-				} else {
-					do {
-						n = n->parent;
-					} while (n != NULL && n->second_child != NULL);
-					if (n == NULL)
-						continue;
-					n->second_child = birth;
-				}
-				birth->parent = n;
-			}
-			n = birth;
-			char birth_rotation;
-			if (isupper(line[level])) {
-				char split_type;
-				sscanf(line + level, "%c %c %lf", &split_type, &birth_rotation, &n->split_ratio);
-				if (split_type == 'H') {
-					n->split_type = TYPE_HORIZONTAL;
-				} else if (split_type == 'V') {
-					n->split_type = TYPE_VERTICAL;
-				}
-			} else {
-				client_t *c = make_client(XCB_NONE, d->border_width);
-				num_clients++;
-				char urgent, locked, sticky, private, split_dir, split_mode, state, layer, end = 0;
-				sscanf(line + level, "%c %s %s %X %u %hux%hu%hi%hi %c%c %c%c %c%c%c%c %c", &birth_rotation,
-				       c->class_name, c->instance_name, &c->window, &c->border_width,
-				       &c->floating_rectangle.width, &c->floating_rectangle.height,
-				       &c->floating_rectangle.x, &c->floating_rectangle.y,
-				       &split_dir, &split_mode, &state, &layer,
-				       &urgent, &locked, &sticky, &private, &end);
-				n->split_mode = (split_mode == '-' ? MODE_AUTOMATIC : MODE_MANUAL);
-				if (split_dir == 'U') {
-					n->split_dir = DIR_UP;
-				} else if (split_dir == 'R') {
-					n->split_dir = DIR_RIGHT;
-				} else if (split_dir == 'D') {
-					n->split_dir = DIR_DOWN;
-				} else if (split_dir == 'L') {
-					n->split_dir = DIR_LEFT;
-				}
-				if (state == 'f') {
-					c->state = STATE_FLOATING;
-				} else if (state == 'F') {
-					c->state = STATE_FULLSCREEN;
-				} else if (state == 'p') {
-					c->state = STATE_PSEUDO_TILED;
-				}
-				if (layer == 'b') {
-					c->layer = LAYER_BELOW;
-				} else if (layer == 'a') {
-					c->layer = LAYER_ABOVE;
-				}
-				c->urgent = (urgent == '-' ? false : true);
-				c->locked = (locked == '-' ? false : true);
-				c->sticky = (sticky == '-' ? false : true);
-				c->private = (private == '-' ? false : true);
-				n->client = c;
-				if (end != 0) {
-					d->focus = n;
-				}
-				if (c->sticky) {
-					m->num_sticky++;
+			tokens = rtokens;
+		}
+	}
+
+	if (ret < 0) {
+		warn("Restore tree: jsmn_parse: ");
+		switch (ret) {
+			case JSMN_ERROR_NOMEM:
+				warn("not enough memory.\n");
+				break;
+			case JSMN_ERROR_INVAL:
+				warn("found invalid character inside JSON string.\n");
+				break;
+			case JSMN_ERROR_PART:
+				warn("not a full JSON packet.\n");
+				break;
+			default:
+				warn("unknown error.\n");
+				break;
+		}
+
+		free(tokens);
+		free(json);
+
+		return false;
+	}
+
+	int num = tokens[0].size;
+
+	if (num < 1) {
+		free(tokens);
+		free(json);
+
+		return false;
+	}
+
+	mon = NULL;
+	while (mon_head != NULL) {
+		remove_monitor(mon_head);
+	}
+
+	jsmntok_t *t = tokens + 1;
+	uint32_t focused_monitor_id = 0, primary_monitor_id = 0;
+
+	for (int i = 0; i < num; i++) {
+		if (keyeq("focusedMonitorId", t, json)) {
+			t++;
+			sscanf(json + t->start, "%u", &focused_monitor_id);
+		} else if (keyeq("primaryMonitorId", t, json)) {
+			t++;
+			sscanf(json + t->start, "%u", &primary_monitor_id);
+		} else if (keyeq("clientsCount", t, json)) {
+			t++;
+			sscanf(json + t->start, "%u", &clients_count);
+		} else if (keyeq("monitors", t, json)) {
+			t++;
+			int s = t->size;
+			t++;
+			for (int j = 0; j < s; j++) {
+				monitor_t *m = restore_monitor(&t, json);
+				if (m->desk == NULL) {
+					add_desktop(m, make_desktop(NULL, XCB_NONE));
 				}
+				add_monitor(m);
 			}
-			if (birth_rotation == 'a') {
-				n->birth_rotation = 90;
-			} else if (birth_rotation == 'c') {
-				n->birth_rotation = 270;
-			} else if (birth_rotation == 'm') {
-				n->birth_rotation = 0;
-			}
+			continue;
+		} else if (keyeq("focusHistory", t, json)) {
+			t++;
+			restore_history(&t, json);
+			continue;
+		} else if (keyeq("stackingList", t, json)) {
+			t++;
+			restore_stack(&t, json);
+			continue;
 		}
-		last_level = level;
+		t++;
 	}
 
-	fclose(snapshot);
+	if (focused_monitor_id != 0) {
+		coordinates_t loc;
+		if (monitor_from_id(focused_monitor_id, &loc)) {
+			mon = loc.monitor;
+		}
+	}
+
+	if (primary_monitor_id != 0) {
+		coordinates_t loc;
+		if (monitor_from_id(primary_monitor_id, &loc)) {
+			pri_mon = loc.monitor;
+		}
+	}
 
 	for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 		for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
+			refresh_presel_feebacks_in(d->root, d, m);
+			restack_presel_feedback(d);
 			for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
-				uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
-				xcb_change_window_attributes(dpy, n->client->window, XCB_CW_EVENT_MASK, values);
-				if (!IS_TILED(n->client)) {
-					n->vacant = true;
-					update_vacant_state(n->parent);
-				}
-				if (n->client->private) {
-					update_privacy_level(n, true);
+				if (n->client == NULL) {
+					continue;
 				}
+				initialize_client(n);
+				uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
+				xcb_change_window_attributes(dpy, n->id, XCB_CW_EVENT_MASK, values);
 			}
-			/* Has the side effect of restoring the node's rectangles and the client's tiled rectangles */
-			arrange(m, d);
 		}
 	}
 
+	ewmh_update_client_list(false);
+	ewmh_update_client_list(true);
+	ewmh_update_active_window();
+	ewmh_update_number_of_desktops();
 	ewmh_update_current_desktop();
+	ewmh_update_desktop_names();
+
+	free(tokens);
+	free(json);
+
+	return true;
 }
 
-void restore_history(char *file_path)
+#define RESTORE_INT(k, p) \
+	} else if (keyeq(#k, *t, json)) { \
+		(*t)++; \
+		sscanf(json + (*t)->start, "%i", p);
+
+#define RESTORE_UINT(k, p) \
+	} else if (keyeq(#k, *t, json)) { \
+		(*t)++; \
+		sscanf(json + (*t)->start, "%u", p);
+
+#define RESTORE_USINT(k, p) \
+	} else if (keyeq(#k, *t, json)) { \
+		(*t)++; \
+		sscanf(json + (*t)->start, "%hu", p);
+
+#define RESTORE_DOUBLE(k, p) \
+	} else if (keyeq(#k, *t, json)) { \
+		(*t)++; \
+		sscanf(json + (*t)->start, "%lf", p);
+
+#define RESTORE_ANY(k, p, f) \
+	} else if (keyeq(#k, *t, json)) { \
+		(*t)++; \
+		char *val = copy_string(json + (*t)->start, (*t)->end - (*t)->start); \
+		f(val, p); \
+		free(val);
+
+#define RESTORE_BOOL(k, p)  RESTORE_ANY(k, p, parse_bool)
+
+monitor_t *restore_monitor(jsmntok_t **t, char *json)
 {
-	if (file_path == NULL)
-		return;
+	int num = (*t)->size;
+	(*t)++;
+	monitor_t *m = make_monitor(NULL, UINT32_MAX);
+	uint32_t focused_desktop_id = 0;
+
+	for (int i = 0; i < num; i++) {
+		if (keyeq("name", *t, json)) {
+			(*t)++;
+			snprintf(m->name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
+		RESTORE_UINT(id, &m->id)
+		RESTORE_UINT(randrId, &m->randr_id)
+		RESTORE_BOOL(wired, &m->wired)
+		RESTORE_UINT(stickyCount, &m->sticky_count)
+		RESTORE_INT(windowGap, &m->window_gap)
+		RESTORE_UINT(borderWidth, &m->border_width)
+		RESTORE_UINT(focusedDesktopId, &focused_desktop_id)
+		} else if (keyeq("padding", *t, json)) {
+			(*t)++;
+			restore_padding(&m->padding, t, json);
+			continue;
+		} else if (keyeq("rectangle", *t, json)) {
+			(*t)++;
+			restore_rectangle(&m->rectangle, t, json);
+			update_root(m, &m->rectangle);
+			continue;
+		} else if (keyeq("desktops", *t, json)) {
+			(*t)++;
+			int s = (*t)->size;
+			(*t)++;
+			for (int j = 0; j < s; j++) {
+				desktop_t *d = restore_desktop(t, json);
+				add_desktop(m, d);
+			}
+			continue;
+		} else {
+			warn("Restore monitor: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
+			(*t)++;
+		}
+		(*t)++;
+	}
 
-	FILE *snapshot = fopen(file_path, "r");
-	if (snapshot == NULL) {
-		warn("Restore history: can't open '%s'.\n", file_path);
-		return;
+	if (focused_desktop_id != 0) {
+		for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
+			if (d->id == focused_desktop_id) {
+				m->desk = d;
+				break;
+			}
+		}
 	}
 
-	char line[MAXLEN];
-	char mnm[SMALEN];
-	char dnm[SMALEN];
-	xcb_window_t win;
+	return m;
+}
+
+desktop_t *restore_desktop(jsmntok_t **t, char *json)
+{
+	int s = (*t)->size;
+	(*t)++;
+	desktop_t *d = make_desktop(NULL, UINT32_MAX);
+	xcb_window_t focusedNodeId = XCB_NONE;
 
-	while (fgets(line, sizeof(line), snapshot) != NULL) {
-		if (sscanf(line, "%s %s %X", mnm, dnm, &win) == 3) {
-			coordinates_t loc;
-			if (win != XCB_NONE && !locate_window(win, &loc)) {
-				warn("Can't locate window 0x%X.\n", win);
+	for (int i = 0; i < s; i++) {
+		if (keyeq("name", *t, json)) {
+			(*t)++;
+			snprintf(d->name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
+		RESTORE_UINT(id, &d->id)
+		RESTORE_ANY(layout, &d->layout, parse_layout)
+		RESTORE_INT(windowGap, &d->window_gap)
+		RESTORE_UINT(borderWidth, &d->border_width)
+		} else if (keyeq("focusedNodeId", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%u", &focusedNodeId);
+		} else if (keyeq("padding", *t, json)) {
+			(*t)++;
+			restore_padding(&d->padding, t, json);
+			continue;
+		} else if (keyeq("root", *t, json)) {
+			(*t)++;
+			d->root = restore_node(t, json);
+			continue;
+		} else {
+			warn("Restore desktop: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
+			(*t)++;
+		}
+		(*t)++;
+	}
+
+	if (focusedNodeId != XCB_NONE) {
+		d->focus = find_by_id_in(d->root, focusedNodeId);
+	}
+
+	return d;
+}
+
+node_t *restore_node(jsmntok_t **t, char *json)
+{
+	if ((*t)->type == JSMN_PRIMITIVE) {
+		(*t)++;
+		return NULL;
+	} else {
+		int s = (*t)->size;
+		(*t)++;
+		/* hack to prevent a new ID from being generated */
+		node_t *n = make_node(UINT32_MAX);
+
+		for (int i = 0; i < s; i++) {
+			if (keyeq("id", *t, json)) {
+				(*t)++;
+				sscanf(json + (*t)->start, "%u", &n->id);
+			RESTORE_ANY(splitType, &n->split_type, parse_split_type)
+			RESTORE_DOUBLE(splitRatio, &n->split_ratio)
+			RESTORE_INT(birthRotation, &n->birth_rotation)
+			RESTORE_BOOL(vacant, &n->vacant)
+			RESTORE_BOOL(hidden, &n->hidden)
+			RESTORE_BOOL(sticky, &n->sticky)
+			RESTORE_BOOL(private, &n->private)
+			RESTORE_BOOL(locked, &n->locked)
+			} else if (keyeq("presel", *t, json)) {
+				(*t)++;
+				n->presel = restore_presel(t, json);
 				continue;
-			}
-			node_t *n = (win == XCB_NONE ? NULL : loc.node);
-			if (!locate_desktop(dnm, &loc)) {
-				warn("Can't locate desktop '%s'.\n", dnm);
+			} else if (keyeq("rectangle", *t, json)) {
+				(*t)++;
+				restore_rectangle(&n->rectangle, t, json);
+				continue;
+			} else if (keyeq("firstChild", *t, json)) {
+				(*t)++;
+				node_t *fc = restore_node(t, json);
+				n->first_child = fc;
+				if (fc != NULL) {
+					fc->parent = n;
+				}
+				continue;
+			} else if (keyeq("secondChild", *t, json)) {
+				(*t)++;
+				node_t *sc = restore_node(t, json);
+				n->second_child = sc;
+				if (sc != NULL) {
+					sc->parent = n;
+				}
+				continue;
+			} else if (keyeq("client", *t, json)) {
+				(*t)++;
+				n->client = restore_client(t, json);
 				continue;
+			} else {
+				warn("Restore node: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
+				(*t)++;
+			}
+			(*t)++;
+		}
+
+		return n;
+	}
+}
+
+presel_t *restore_presel(jsmntok_t **t, char *json)
+{
+	if ((*t)->type == JSMN_PRIMITIVE) {
+		(*t)++;
+		return NULL;
+	} else {
+		int s = (*t)->size;
+		(*t)++;
+		presel_t *p = make_presel();
+
+		for (int i = 0; i < s; i++) {
+			if (keyeq("splitRatio", *t, json)) {
+				(*t)++;
+				sscanf(json + (*t)->start, "%lf", &p->split_ratio);
+			RESTORE_ANY(splitDir, &p->split_dir, parse_direction)
 			}
-			desktop_t *d = loc.desktop;
-			if (!locate_monitor(mnm, &loc)) {
-				warn("Can't locate monitor '%s'.\n", mnm);
+
+			(*t)++;
+		}
+
+		return p;
+	}
+}
+
+
+client_t *restore_client(jsmntok_t **t, char *json)
+{
+	if ((*t)->type == JSMN_PRIMITIVE) {
+		(*t)++;
+		return NULL;
+	} else {
+		int s = (*t)->size;
+		(*t)++;
+		client_t *c = make_client();
+
+		for (int i = 0; i < s; i++) {
+			if (keyeq("className", *t, json)) {
+				(*t)++;
+				snprintf(c->class_name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
+			} else if (keyeq("instanceName", *t, json)) {
+				(*t)++;
+				snprintf(c->instance_name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
+			RESTORE_ANY(state, &c->state, parse_client_state)
+			RESTORE_ANY(lastState, &c->last_state, parse_client_state)
+			RESTORE_ANY(layer, &c->layer, parse_stack_layer)
+			RESTORE_ANY(lastLayer, &c->last_layer, parse_stack_layer)
+			RESTORE_UINT(borderWidth, &c->border_width)
+			RESTORE_BOOL(urgent, &c->urgent)
+			RESTORE_BOOL(shown, &c->shown)
+			} else if (keyeq("tiledRectangle", *t, json)) {
+				(*t)++;
+				restore_rectangle(&c->tiled_rectangle, t, json);
 				continue;
+			} else if (keyeq("floatingRectangle", *t, json)) {
+				(*t)++;
+				restore_rectangle(&c->floating_rectangle, t, json);
+				continue;
+			} else {
+				warn("Restore client: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
+				(*t)++;
 			}
-			monitor_t *m = loc.monitor;
-			history_add(m, d, n);
-		} else {
-			warn("Can't parse history entry: '%s'\n", line);
+
+			(*t)++;
 		}
+
+		return c;
 	}
+}
 
-	fclose(snapshot);
+void restore_rectangle(xcb_rectangle_t *r, jsmntok_t **t, char *json)
+{
+	int s = (*t)->size;
+	(*t)++;
+
+	for (int i = 0; i < s; i++) {
+		if (keyeq("x", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%hi", &r->x);
+		} else if (keyeq("y", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%hi", &r->y);
+		} else if (keyeq("width", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%hu", &r->width);
+		} else if (keyeq("height", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%hu", &r->height);
+		}
+		(*t)++;
+	}
 }
 
-void restore_stack(char *file_path)
+void restore_padding(padding_t *p, jsmntok_t **t, char *json)
 {
-	if (file_path == NULL)
-		return;
+	int s = (*t)->size;
+	(*t)++;
 
-	FILE *snapshot = fopen(file_path, "r");
-	if (snapshot == NULL) {
-		warn("Restore stack: can't open '%s'.\n", file_path);
-		return;
+	for (int i = 0; i < s; i++) {
+		if (keyeq("top", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%i", &p->top);
+		} else if (keyeq("right", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%i", &p->right);
+		} else if (keyeq("bottom", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%i", &p->bottom);
+		} else if (keyeq("left", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%i", &p->left);
+		}
+		(*t)++;
 	}
+}
 
-	char line[MAXLEN];
-	xcb_window_t win;
+void restore_history(jsmntok_t **t, char *json)
+{
+	int s = (*t)->size;
+	(*t)++;
 
-	while (fgets(line, sizeof(line), snapshot) != NULL) {
-		if (sscanf(line, "%X", &win) == 1) {
-			coordinates_t loc;
-			if (locate_window(win, &loc))
-				stack_insert_after(stack_tail, loc.node);
-			else
-				warn("Can't locate window 0x%X.\n", win);
-		} else {
-			warn("Can't parse stack entry: '%s'\n", line);
+	for (int i = 0; i < s; i++) {
+		coordinates_t loc = {NULL, NULL, NULL};
+		restore_coordinates(&loc, t, json);
+		if (loc.monitor != NULL && loc.desktop != NULL) {
+			history_add(loc.monitor, loc.desktop, loc.node);
 		}
 	}
+}
+
+void restore_coordinates(coordinates_t *loc, jsmntok_t **t, char *json)
+{
+	int s = (*t)->size;
+	(*t)++;
+	uint32_t id = 0;
+
+	for (int i = 0; i < s; i++) {
+		if (keyeq("monitorId", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%u", &id);
+			loc->monitor = find_monitor(id);
+		} else if (keyeq("desktopId", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%u", &id);
+			loc->desktop = find_desktop_in(id, loc->monitor);
+		} else if (keyeq("nodeId", *t, json)) {
+			(*t)++;
+			sscanf(json + (*t)->start, "%u", &id);
+			loc->node = find_by_id_in(loc->desktop != NULL ? loc->desktop->root : NULL, id);
+		}
+		(*t)++;
+	}
+}
 
-	fclose(snapshot);
+void restore_stack(jsmntok_t **t, char *json)
+{
+	int s = (*t)->size;
+	(*t)++;
+
+	for (int i = 0; i < s; i++) {
+		uint32_t id;
+		sscanf(json + (*t)->start, "%u", &id);
+		coordinates_t loc;
+		if (locate_window(id, &loc)) {
+			stack_insert_after(stack_tail, loc.node);
+		}
+		(*t)++;
+	}
+}
+
+#undef RESTORE_INT
+#undef RESTORE_UINT
+#undef RESTORE_USINT
+#undef RESTORE_DOUBLE
+#undef RESTORE_ANY
+#undef RESTORE_BOOL
+
+bool keyeq(char *s, jsmntok_t *key, char *json)
+{
+	size_t n = key->end - key->start;
+	return (strlen(s) == n && strncmp(s, json + key->start, n) == 0);
 }