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gri3-wm/src/load_layout.c

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#undef I3__FILE__
#define I3__FILE__ "load_layout.c"
/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
*
* load_layout.c: Restore (parts of) the layout, for example after an inplace
* restart.
*
*/
#include "all.h"
#include <yajl/yajl_common.h>
#include <yajl/yajl_gen.h>
#include <yajl/yajl_parse.h>
#include <yajl/yajl_version.h>
/* TODO: refactor the whole parsing thing */
static char *last_key;
static Con *json_node;
static Con *to_focus;
static bool parsing_swallows;
static bool parsing_rect;
static bool parsing_window_rect;
static bool parsing_geometry;
static bool parsing_focus;
struct Match *current_swallow;
/* This list is used for reordering the focus stack after parsing the 'focus'
* array. */
struct focus_mapping {
int old_id;
TAILQ_ENTRY(focus_mapping) focus_mappings;
};
static TAILQ_HEAD(focus_mappings_head, focus_mapping) focus_mappings =
TAILQ_HEAD_INITIALIZER(focus_mappings);
static int json_start_map(void *ctx) {
LOG("start of map, last_key = %s\n", last_key);
if (parsing_swallows) {
LOG("creating new swallow\n");
current_swallow = smalloc(sizeof(Match));
match_init(current_swallow);
TAILQ_INSERT_TAIL(&(json_node->swallow_head), current_swallow, matches);
} else {
if (!parsing_rect && !parsing_window_rect && !parsing_geometry) {
if (last_key && strcasecmp(last_key, "floating_nodes") == 0) {
DLOG("New floating_node\n");
Con *ws = con_get_workspace(json_node);
json_node = con_new_skeleton(NULL, NULL);
json_node->parent = ws;
DLOG("Parent is workspace = %p\n", ws);
} else {
Con *parent = json_node;
json_node = con_new_skeleton(NULL, NULL);
json_node->parent = parent;
}
}
}
return 1;
}
static int json_end_map(void *ctx) {
LOG("end of map\n");
if (!parsing_swallows && !parsing_rect && !parsing_window_rect && !parsing_geometry) {
LOG("attaching\n");
con_attach(json_node, json_node->parent, true);
LOG("Creating window\n");
x_con_init(json_node, json_node->depth);
json_node = json_node->parent;
}
if (parsing_rect)
parsing_rect = false;
if (parsing_window_rect)
parsing_window_rect = false;
if (parsing_geometry)
parsing_geometry = false;
return 1;
}
static int json_end_array(void *ctx) {
LOG("end of array\n");
parsing_swallows = false;
if (parsing_focus) {
/* Clear the list of focus mappings */
struct focus_mapping *mapping;
TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
LOG("focus (reverse) %d\n", mapping->old_id);
Con *con;
TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
if (con->old_id != mapping->old_id)
continue;
LOG("got it! %p\n", con);
/* Move this entry to the top of the focus list. */
TAILQ_REMOVE(&(json_node->focus_head), con, focused);
TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
break;
}
}
while (!TAILQ_EMPTY(&focus_mappings)) {
mapping = TAILQ_FIRST(&focus_mappings);
TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
free(mapping);
}
parsing_focus = false;
}
return 1;
}
#if YAJL_MAJOR < 2
static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
#else
static int json_key(void *ctx, const unsigned char *val, size_t len) {
#endif
LOG("key: %.*s\n", (int)len, val);
FREE(last_key);
last_key = scalloc((len+1) * sizeof(char));
memcpy(last_key, val, len);
if (strcasecmp(last_key, "swallows") == 0)
parsing_swallows = true;
if (strcasecmp(last_key, "rect") == 0)
parsing_rect = true;
if (strcasecmp(last_key, "window_rect") == 0)
parsing_window_rect = true;
if (strcasecmp(last_key, "geometry") == 0)
parsing_geometry = true;
if (strcasecmp(last_key, "focus") == 0)
parsing_focus = true;
return 1;
}
#if YAJL_MAJOR >= 2
static int json_string(void *ctx, const unsigned char *val, size_t len) {
#else
static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
#endif
LOG("string: %.*s for key %s\n", (int)len, val, last_key);
if (parsing_swallows) {
/* TODO: the other swallowing keys */
if (strcasecmp(last_key, "class") == 0) {
current_swallow->class = scalloc((len+1) * sizeof(char));
memcpy(current_swallow->class, val, len);
}
LOG("unhandled yet: swallow\n");
} else {
if (strcasecmp(last_key, "name") == 0) {
json_node->name = scalloc((len+1) * sizeof(char));
memcpy(json_node->name, val, len);
} else if (strcasecmp(last_key, "sticky_group") == 0) {
json_node->sticky_group = scalloc((len+1) * sizeof(char));
memcpy(json_node->sticky_group, val, len);
LOG("sticky_group of this container is %s\n", json_node->sticky_group);
} else if (strcasecmp(last_key, "orientation") == 0) {
/* Upgrade path from older versions of i3 (doing an inplace restart
* to a newer version):
* "orientation" is dumped before "layout". Therefore, we store
* whether the orientation was horizontal or vertical in the
* last_split_layout. When we then encounter layout == "default",
* we will use the last_split_layout as layout instead. */
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "none") == 0 ||
strcasecmp(buf, "horizontal") == 0)
json_node->last_split_layout = L_SPLITH;
else if (strcasecmp(buf, "vertical") == 0)
json_node->last_split_layout = L_SPLITV;
else LOG("Unhandled orientation: %s\n", buf);
free(buf);
} else if (strcasecmp(last_key, "border") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "none") == 0)
json_node->border_style = BS_NONE;
else if (strcasecmp(buf, "1pixel") == 0) {
json_node->border_style = BS_PIXEL;
json_node->current_border_width = 1;
} else if (strcasecmp(buf, "pixel") == 0)
json_node->border_style = BS_PIXEL;
else if (strcasecmp(buf, "normal") == 0)
json_node->border_style = BS_NORMAL;
else LOG("Unhandled \"border\": %s\n", buf);
free(buf);
} else if (strcasecmp(last_key, "layout") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "default") == 0)
/* This set above when we read "orientation". */
json_node->layout = json_node->last_split_layout;
else if (strcasecmp(buf, "stacked") == 0)
json_node->layout = L_STACKED;
else if (strcasecmp(buf, "tabbed") == 0)
json_node->layout = L_TABBED;
else if (strcasecmp(buf, "dockarea") == 0)
json_node->layout = L_DOCKAREA;
else if (strcasecmp(buf, "output") == 0)
json_node->layout = L_OUTPUT;
else if (strcasecmp(buf, "splith") == 0)
json_node->layout = L_SPLITH;
else if (strcasecmp(buf, "splitv") == 0)
json_node->layout = L_SPLITV;
else LOG("Unhandled \"layout\": %s\n", buf);
free(buf);
} else if (strcasecmp(last_key, "workspace_layout") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "default") == 0)
json_node->workspace_layout = L_DEFAULT;
else if (strcasecmp(buf, "stacked") == 0)
json_node->workspace_layout = L_STACKED;
else if (strcasecmp(buf, "tabbed") == 0)
json_node->workspace_layout = L_TABBED;
else LOG("Unhandled \"workspace_layout\": %s\n", buf);
free(buf);
} else if (strcasecmp(last_key, "last_split_layout") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "splith") == 0)
json_node->last_split_layout = L_SPLITH;
else if (strcasecmp(buf, "splitv") == 0)
json_node->last_split_layout = L_SPLITV;
else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
free(buf);
} else if (strcasecmp(last_key, "mark") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
json_node->mark = buf;
} else if (strcasecmp(last_key, "floating") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "auto_off") == 0)
json_node->floating = FLOATING_AUTO_OFF;
else if (strcasecmp(buf, "auto_on") == 0)
json_node->floating = FLOATING_AUTO_ON;
else if (strcasecmp(buf, "user_off") == 0)
json_node->floating = FLOATING_USER_OFF;
else if (strcasecmp(buf, "user_on") == 0)
json_node->floating = FLOATING_USER_ON;
free(buf);
} else if (strcasecmp(last_key, "scratchpad_state") == 0) {
char *buf = NULL;
sasprintf(&buf, "%.*s", (int)len, val);
if (strcasecmp(buf, "none") == 0)
json_node->scratchpad_state = SCRATCHPAD_NONE;
else if (strcasecmp(buf, "fresh") == 0)
json_node->scratchpad_state = SCRATCHPAD_FRESH;
else if (strcasecmp(buf, "changed") == 0)
json_node->scratchpad_state = SCRATCHPAD_CHANGED;
free(buf);
}
}
return 1;
}
#if YAJL_MAJOR >= 2
static int json_int(void *ctx, long long val) {
LOG("int %lld for key %s\n", val, last_key);
#else
static int json_int(void *ctx, long val) {
LOG("int %ld for key %s\n", val, last_key);
#endif
if (strcasecmp(last_key, "type") == 0)
json_node->type = val;
if (strcasecmp(last_key, "fullscreen_mode") == 0)
json_node->fullscreen_mode = val;
if (strcasecmp(last_key, "num") == 0)
json_node->num = val;
if (strcasecmp(last_key, "current_border_width") == 0)
json_node->current_border_width = val;
if (strcasecmp(last_key, "depth") == 0)
json_node->depth = val;
if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
json_node->old_id = val;
if (parsing_focus) {
struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
focus_mapping->old_id = val;
TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
}
if (parsing_rect || parsing_window_rect || parsing_geometry) {
Rect *r;
if (parsing_rect)
r = &(json_node->rect);
else if (parsing_window_rect)
r = &(json_node->window_rect);
else r = &(json_node->geometry);
if (strcasecmp(last_key, "x") == 0)
r->x = val;
else if (strcasecmp(last_key, "y") == 0)
r->y = val;
else if (strcasecmp(last_key, "width") == 0)
r->width = val;
else if (strcasecmp(last_key, "height") == 0)
r->height = val;
else printf("WARNING: unknown key %s in rect\n", last_key);
printf("rect now: (%d, %d, %d, %d)\n",
r->x, r->y, r->width, r->height);
}
if (parsing_swallows) {
if (strcasecmp(last_key, "id") == 0) {
current_swallow->id = val;
}
if (strcasecmp(last_key, "dock") == 0) {
current_swallow->dock = val;
}
if (strcasecmp(last_key, "insert_where") == 0) {
current_swallow->insert_where = val;
}
}
return 1;
}
static int json_bool(void *ctx, int val) {
LOG("bool %d for key %s\n", val, last_key);
if (strcasecmp(last_key, "focused") == 0 && val) {
to_focus = json_node;
}
if (parsing_swallows) {
if (strcasecmp(last_key, "restart_mode") == 0)
current_swallow->restart_mode = val;
}
return 1;
}
static int json_double(void *ctx, double val) {
LOG("double %f for key %s\n", val, last_key);
if (strcasecmp(last_key, "percent") == 0) {
json_node->percent = val;
}
return 1;
}
void tree_append_json(const char *filename) {
/* TODO: percent of other windows are not correctly fixed at the moment */
FILE *f;
if ((f = fopen(filename, "r")) == NULL) {
LOG("Cannot open file \"%s\"\n", filename);
return;
}
struct stat stbuf;
if (fstat(fileno(f), &stbuf) != 0) {
LOG("Cannot fstat() the file\n");
fclose(f);
return;
}
char *buf = smalloc(stbuf.st_size);
int n = fread(buf, 1, stbuf.st_size, f);
if (n != stbuf.st_size) {
LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
fclose(f);
return;
}
LOG("read %d bytes\n", n);
yajl_gen g;
yajl_handle hand;
yajl_callbacks callbacks;
memset(&callbacks, '\0', sizeof(yajl_callbacks));
callbacks.yajl_start_map = json_start_map;
callbacks.yajl_end_map = json_end_map;
callbacks.yajl_end_array = json_end_array;
callbacks.yajl_string = json_string;
callbacks.yajl_map_key = json_key;
callbacks.yajl_integer = json_int;
callbacks.yajl_double = json_double;
callbacks.yajl_boolean = json_bool;
#if YAJL_MAJOR >= 2
g = yajl_gen_alloc(NULL);
hand = yajl_alloc(&callbacks, NULL, (void*)g);
#else
g = yajl_gen_alloc(NULL, NULL);
hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
#endif
yajl_status stat;
json_node = focused;
to_focus = NULL;
parsing_rect = false;
parsing_window_rect = false;
parsing_geometry = false;
setlocale(LC_NUMERIC, "C");
stat = yajl_parse(hand, (const unsigned char*)buf, n);
if (stat != yajl_status_ok)
{
unsigned char * str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
fprintf(stderr, "%s\n", (const char *) str);
yajl_free_error(hand, str);
}
setlocale(LC_NUMERIC, "");
#if YAJL_MAJOR >= 2
yajl_complete_parse(hand);
#else
yajl_parse_complete(hand);
#endif
fclose(f);
if (to_focus)
con_focus(to_focus);
}
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