580 lines
21 KiB
C
580 lines
21 KiB
C
#undef I3__FILE__
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#define I3__FILE__ "load_layout.c"
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/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* load_layout.c: Restore (parts of) the layout, for example after an inplace
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* restart.
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*
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*/
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#include "all.h"
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#include <yajl/yajl_common.h>
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#include <yajl/yajl_gen.h>
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#include <yajl/yajl_parse.h>
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#include <yajl/yajl_version.h>
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/* TODO: refactor the whole parsing thing */
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static char *last_key;
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static Con *json_node;
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static Con *to_focus;
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static bool parsing_swallows;
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static bool parsing_rect;
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static bool parsing_deco_rect;
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static bool parsing_window_rect;
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static bool parsing_geometry;
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static bool parsing_focus;
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struct Match *current_swallow;
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/* This list is used for reordering the focus stack after parsing the 'focus'
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* array. */
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struct focus_mapping {
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int old_id;
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TAILQ_ENTRY(focus_mapping) focus_mappings;
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};
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static TAILQ_HEAD(focus_mappings_head, focus_mapping) focus_mappings =
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TAILQ_HEAD_INITIALIZER(focus_mappings);
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static int json_start_map(void *ctx) {
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LOG("start of map, last_key = %s\n", last_key);
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if (parsing_swallows) {
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LOG("creating new swallow\n");
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current_swallow = smalloc(sizeof(Match));
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match_init(current_swallow);
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TAILQ_INSERT_TAIL(&(json_node->swallow_head), current_swallow, matches);
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} else {
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if (!parsing_rect && !parsing_deco_rect && !parsing_window_rect && !parsing_geometry) {
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if (last_key && strcasecmp(last_key, "floating_nodes") == 0) {
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DLOG("New floating_node\n");
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Con *ws = con_get_workspace(json_node);
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json_node = con_new_skeleton(NULL, NULL);
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json_node->name = NULL;
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json_node->parent = ws;
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DLOG("Parent is workspace = %p\n", ws);
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} else {
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Con *parent = json_node;
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json_node = con_new_skeleton(NULL, NULL);
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json_node->name = NULL;
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json_node->parent = parent;
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}
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}
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}
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return 1;
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}
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static int json_end_map(void *ctx) {
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LOG("end of map\n");
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if (!parsing_swallows && !parsing_rect && !parsing_deco_rect && !parsing_window_rect && !parsing_geometry) {
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/* Set a few default values to simplify manually crafted layout files. */
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if (json_node->layout == L_DEFAULT) {
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DLOG("Setting layout = L_SPLITH\n");
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json_node->layout = L_SPLITH;
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}
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/* Sanity check: swallow criteria don’t make any sense on a split
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* container. */
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if (con_is_split(json_node) > 0 && !TAILQ_EMPTY(&(json_node->swallow_head))) {
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DLOG("sanity check: removing swallows specification from split container\n");
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while (!TAILQ_EMPTY(&(json_node->swallow_head))) {
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Match *match = TAILQ_FIRST(&(json_node->swallow_head));
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TAILQ_REMOVE(&(json_node->swallow_head), match, matches);
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match_free(match);
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}
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}
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if (json_node->type == CT_WORKSPACE) {
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/* Ensure the workspace has a name. */
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DLOG("Attaching workspace. name = %s\n", json_node->name);
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if (json_node->name == NULL || strcmp(json_node->name, "") == 0) {
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json_node->name = sstrdup("unnamed");
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}
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/* Prevent name clashes when appending a workspace, e.g. when the
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* user tries to restore a workspace called “1” but already has a
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* workspace called “1”. */
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Con *output;
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Con *workspace = NULL;
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes)
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GREP_FIRST(workspace, output_get_content(output), !strcasecmp(child->name, json_node->name));
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char *base = sstrdup(json_node->name);
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int cnt = 1;
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while (workspace != NULL) {
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FREE(json_node->name);
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sasprintf(&(json_node->name), "%s_%d", base, cnt++);
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workspace = NULL;
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes)
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GREP_FIRST(workspace, output_get_content(output), !strcasecmp(child->name, json_node->name));
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}
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free(base);
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/* Set num accordingly so that i3bar will properly sort it. */
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json_node->num = ws_name_to_number(json_node->name);
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}
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LOG("attaching\n");
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con_attach(json_node, json_node->parent, true);
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LOG("Creating window\n");
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x_con_init(json_node, json_node->depth);
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json_node = json_node->parent;
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}
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parsing_rect = false;
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parsing_deco_rect = false;
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parsing_window_rect = false;
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parsing_geometry = false;
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return 1;
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}
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static int json_end_array(void *ctx) {
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LOG("end of array\n");
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if (!parsing_swallows && !parsing_focus) {
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con_fix_percent(json_node);
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}
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if (parsing_swallows) {
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parsing_swallows = false;
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}
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if (parsing_focus) {
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/* Clear the list of focus mappings */
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struct focus_mapping *mapping;
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TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
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LOG("focus (reverse) %d\n", mapping->old_id);
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Con *con;
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TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
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if (con->old_id != mapping->old_id)
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continue;
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LOG("got it! %p\n", con);
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/* Move this entry to the top of the focus list. */
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TAILQ_REMOVE(&(json_node->focus_head), con, focused);
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TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
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break;
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}
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}
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while (!TAILQ_EMPTY(&focus_mappings)) {
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mapping = TAILQ_FIRST(&focus_mappings);
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TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
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free(mapping);
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}
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parsing_focus = false;
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}
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return 1;
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}
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static int json_key(void *ctx, const unsigned char *val, size_t len) {
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LOG("key: %.*s\n", (int)len, val);
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FREE(last_key);
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last_key = scalloc((len + 1) * sizeof(char));
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memcpy(last_key, val, len);
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if (strcasecmp(last_key, "swallows") == 0)
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parsing_swallows = true;
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if (strcasecmp(last_key, "rect") == 0)
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parsing_rect = true;
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if (strcasecmp(last_key, "deco_rect") == 0)
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parsing_deco_rect = true;
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if (strcasecmp(last_key, "window_rect") == 0)
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parsing_window_rect = true;
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if (strcasecmp(last_key, "geometry") == 0)
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parsing_geometry = true;
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if (strcasecmp(last_key, "focus") == 0)
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parsing_focus = true;
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return 1;
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}
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static int json_string(void *ctx, const unsigned char *val, size_t len) {
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LOG("string: %.*s for key %s\n", (int)len, val, last_key);
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if (parsing_swallows) {
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char *sval;
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sasprintf(&sval, "%.*s", len, val);
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if (strcasecmp(last_key, "class") == 0) {
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current_swallow->class = regex_new(sval);
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} else if (strcasecmp(last_key, "instance") == 0) {
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current_swallow->instance = regex_new(sval);
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} else if (strcasecmp(last_key, "window_role") == 0) {
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current_swallow->window_role = regex_new(sval);
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} else if (strcasecmp(last_key, "title") == 0) {
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current_swallow->title = regex_new(sval);
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} else {
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ELOG("swallow key %s unknown\n", last_key);
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}
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free(sval);
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} else {
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if (strcasecmp(last_key, "name") == 0) {
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json_node->name = scalloc((len + 1) * sizeof(char));
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memcpy(json_node->name, val, len);
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} else if (strcasecmp(last_key, "sticky_group") == 0) {
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json_node->sticky_group = scalloc((len + 1) * sizeof(char));
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memcpy(json_node->sticky_group, val, len);
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LOG("sticky_group of this container is %s\n", json_node->sticky_group);
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} else if (strcasecmp(last_key, "orientation") == 0) {
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/* Upgrade path from older versions of i3 (doing an inplace restart
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* to a newer version):
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* "orientation" is dumped before "layout". Therefore, we store
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* whether the orientation was horizontal or vertical in the
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* last_split_layout. When we then encounter layout == "default",
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* we will use the last_split_layout as layout instead. */
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "none") == 0 ||
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strcasecmp(buf, "horizontal") == 0)
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json_node->last_split_layout = L_SPLITH;
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else if (strcasecmp(buf, "vertical") == 0)
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json_node->last_split_layout = L_SPLITV;
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else
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LOG("Unhandled orientation: %s\n", buf);
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free(buf);
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} else if (strcasecmp(last_key, "border") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "none") == 0)
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json_node->border_style = BS_NONE;
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else if (strcasecmp(buf, "1pixel") == 0) {
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json_node->border_style = BS_PIXEL;
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json_node->current_border_width = 1;
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} else if (strcasecmp(buf, "pixel") == 0)
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json_node->border_style = BS_PIXEL;
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else if (strcasecmp(buf, "normal") == 0)
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json_node->border_style = BS_NORMAL;
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else
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LOG("Unhandled \"border\": %s\n", buf);
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free(buf);
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} else if (strcasecmp(last_key, "type") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "root") == 0)
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json_node->type = CT_ROOT;
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else if (strcasecmp(buf, "output") == 0)
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json_node->type = CT_OUTPUT;
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else if (strcasecmp(buf, "con") == 0)
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json_node->type = CT_CON;
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else if (strcasecmp(buf, "floating_con") == 0)
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json_node->type = CT_FLOATING_CON;
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else if (strcasecmp(buf, "workspace") == 0)
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json_node->type = CT_WORKSPACE;
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else if (strcasecmp(buf, "dockarea") == 0)
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json_node->type = CT_DOCKAREA;
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else
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LOG("Unhandled \"type\": %s\n", buf);
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free(buf);
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} else if (strcasecmp(last_key, "layout") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "default") == 0)
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/* This set above when we read "orientation". */
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json_node->layout = json_node->last_split_layout;
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else if (strcasecmp(buf, "stacked") == 0)
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json_node->layout = L_STACKED;
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else if (strcasecmp(buf, "tabbed") == 0)
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json_node->layout = L_TABBED;
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else if (strcasecmp(buf, "dockarea") == 0)
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json_node->layout = L_DOCKAREA;
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else if (strcasecmp(buf, "output") == 0)
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json_node->layout = L_OUTPUT;
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else if (strcasecmp(buf, "splith") == 0)
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json_node->layout = L_SPLITH;
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else if (strcasecmp(buf, "splitv") == 0)
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json_node->layout = L_SPLITV;
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else
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LOG("Unhandled \"layout\": %s\n", buf);
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free(buf);
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} else if (strcasecmp(last_key, "workspace_layout") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "default") == 0)
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json_node->workspace_layout = L_DEFAULT;
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else if (strcasecmp(buf, "stacked") == 0)
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json_node->workspace_layout = L_STACKED;
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else if (strcasecmp(buf, "tabbed") == 0)
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json_node->workspace_layout = L_TABBED;
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else
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LOG("Unhandled \"workspace_layout\": %s\n", buf);
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free(buf);
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} else if (strcasecmp(last_key, "last_split_layout") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "splith") == 0)
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json_node->last_split_layout = L_SPLITH;
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else if (strcasecmp(buf, "splitv") == 0)
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json_node->last_split_layout = L_SPLITV;
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else
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LOG("Unhandled \"last_splitlayout\": %s\n", buf);
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free(buf);
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} else if (strcasecmp(last_key, "mark") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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json_node->mark = buf;
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} else if (strcasecmp(last_key, "floating") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "auto_off") == 0)
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json_node->floating = FLOATING_AUTO_OFF;
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else if (strcasecmp(buf, "auto_on") == 0)
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json_node->floating = FLOATING_AUTO_ON;
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else if (strcasecmp(buf, "user_off") == 0)
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json_node->floating = FLOATING_USER_OFF;
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else if (strcasecmp(buf, "user_on") == 0)
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json_node->floating = FLOATING_USER_ON;
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free(buf);
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} else if (strcasecmp(last_key, "scratchpad_state") == 0) {
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char *buf = NULL;
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sasprintf(&buf, "%.*s", (int)len, val);
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if (strcasecmp(buf, "none") == 0)
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json_node->scratchpad_state = SCRATCHPAD_NONE;
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else if (strcasecmp(buf, "fresh") == 0)
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json_node->scratchpad_state = SCRATCHPAD_FRESH;
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else if (strcasecmp(buf, "changed") == 0)
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json_node->scratchpad_state = SCRATCHPAD_CHANGED;
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free(buf);
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}
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}
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return 1;
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}
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static int json_int(void *ctx, long long val) {
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LOG("int %lld for key %s\n", val, last_key);
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/* For backwards compatibility with i3 < 4.8 */
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if (strcasecmp(last_key, "type") == 0)
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json_node->type = val;
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if (strcasecmp(last_key, "fullscreen_mode") == 0)
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json_node->fullscreen_mode = val;
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if (strcasecmp(last_key, "num") == 0)
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json_node->num = val;
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if (strcasecmp(last_key, "current_border_width") == 0)
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json_node->current_border_width = val;
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if (strcasecmp(last_key, "depth") == 0)
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json_node->depth = val;
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if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
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json_node->old_id = val;
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if (parsing_focus) {
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struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
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focus_mapping->old_id = val;
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TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
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}
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if (parsing_rect || parsing_window_rect || parsing_geometry) {
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Rect *r;
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if (parsing_rect)
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r = &(json_node->rect);
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else if (parsing_window_rect)
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r = &(json_node->window_rect);
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else
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r = &(json_node->geometry);
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if (strcasecmp(last_key, "x") == 0)
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r->x = val;
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else if (strcasecmp(last_key, "y") == 0)
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r->y = val;
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else if (strcasecmp(last_key, "width") == 0)
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r->width = val;
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else if (strcasecmp(last_key, "height") == 0)
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r->height = val;
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else
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ELOG("WARNING: unknown key %s in rect\n", last_key);
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DLOG("rect now: (%d, %d, %d, %d)\n",
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r->x, r->y, r->width, r->height);
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}
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if (parsing_swallows) {
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if (strcasecmp(last_key, "id") == 0) {
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current_swallow->id = val;
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}
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if (strcasecmp(last_key, "dock") == 0) {
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current_swallow->dock = val;
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}
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if (strcasecmp(last_key, "insert_where") == 0) {
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current_swallow->insert_where = val;
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}
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}
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return 1;
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}
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static int json_bool(void *ctx, int val) {
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LOG("bool %d for key %s\n", val, last_key);
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if (strcasecmp(last_key, "focused") == 0 && val) {
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to_focus = json_node;
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}
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if (parsing_swallows) {
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if (strcasecmp(last_key, "restart_mode") == 0)
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current_swallow->restart_mode = val;
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}
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return 1;
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}
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static int json_double(void *ctx, double val) {
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LOG("double %f for key %s\n", val, last_key);
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if (strcasecmp(last_key, "percent") == 0) {
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json_node->percent = val;
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}
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return 1;
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}
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static json_content_t content_result;
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static int content_level;
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static int json_determine_content_deeper(void *ctx) {
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content_level++;
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return 1;
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}
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static int json_determine_content_shallower(void *ctx) {
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content_level--;
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return 1;
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}
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static int json_determine_content_string(void *ctx, const unsigned char *val, size_t len) {
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if (strcasecmp(last_key, "type") != 0 || content_level > 1)
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return 1;
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DLOG("string = %.*s, last_key = %s\n", (int)len, val, last_key);
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if (strncasecmp((const char *)val, "workspace", len) == 0)
|
||
content_result = JSON_CONTENT_WORKSPACE;
|
||
return 0;
|
||
}
|
||
|
||
/* Parses the given JSON file until it encounters the first “type” property to
|
||
* determine whether the file contains workspaces or regular containers, which
|
||
* is important to know when deciding where (and how) to append the contents.
|
||
* */
|
||
json_content_t json_determine_content(const char *filename) {
|
||
FILE *f;
|
||
if ((f = fopen(filename, "r")) == NULL) {
|
||
ELOG("Cannot open file \"%s\"\n", filename);
|
||
return JSON_CONTENT_UNKNOWN;
|
||
}
|
||
struct stat stbuf;
|
||
if (fstat(fileno(f), &stbuf) != 0) {
|
||
ELOG("Cannot fstat() \"%s\"\n", filename);
|
||
fclose(f);
|
||
return JSON_CONTENT_UNKNOWN;
|
||
}
|
||
char *buf = smalloc(stbuf.st_size);
|
||
int n = fread(buf, 1, stbuf.st_size, f);
|
||
if (n != stbuf.st_size) {
|
||
ELOG("File \"%s\" could not be read entirely, not loading.\n", filename);
|
||
fclose(f);
|
||
return JSON_CONTENT_UNKNOWN;
|
||
}
|
||
DLOG("read %d bytes\n", n);
|
||
// We default to JSON_CONTENT_CON because it is legal to not include
|
||
// “"type": "con"” in the JSON files for better readability.
|
||
content_result = JSON_CONTENT_CON;
|
||
content_level = 0;
|
||
yajl_gen g;
|
||
yajl_handle hand;
|
||
static yajl_callbacks callbacks = {
|
||
.yajl_string = json_determine_content_string,
|
||
.yajl_map_key = json_key,
|
||
.yajl_start_array = json_determine_content_deeper,
|
||
.yajl_start_map = json_determine_content_deeper,
|
||
.yajl_end_map = json_determine_content_shallower,
|
||
.yajl_end_array = json_determine_content_shallower,
|
||
};
|
||
g = yajl_gen_alloc(NULL);
|
||
hand = yajl_alloc(&callbacks, NULL, (void *)g);
|
||
/* Allowing comments allows for more user-friendly layout files. */
|
||
yajl_config(hand, yajl_allow_comments, true);
|
||
/* Allow multiple values, i.e. multiple nodes to attach */
|
||
yajl_config(hand, yajl_allow_multiple_values, true);
|
||
yajl_status stat;
|
||
setlocale(LC_NUMERIC, "C");
|
||
stat = yajl_parse(hand, (const unsigned char *)buf, n);
|
||
if (stat != yajl_status_ok && stat != yajl_status_client_canceled) {
|
||
unsigned char *str = yajl_get_error(hand, 1, (const unsigned char *)buf, n);
|
||
ELOG("JSON parsing error: %s\n", str);
|
||
yajl_free_error(hand, str);
|
||
}
|
||
|
||
setlocale(LC_NUMERIC, "");
|
||
yajl_complete_parse(hand);
|
||
|
||
fclose(f);
|
||
|
||
return content_result;
|
||
}
|
||
|
||
void tree_append_json(Con *con, const char *filename, char **errormsg) {
|
||
FILE *f;
|
||
if ((f = fopen(filename, "r")) == NULL) {
|
||
ELOG("Cannot open file \"%s\"\n", filename);
|
||
return;
|
||
}
|
||
struct stat stbuf;
|
||
if (fstat(fileno(f), &stbuf) != 0) {
|
||
ELOG("Cannot fstat() \"%s\"\n", filename);
|
||
fclose(f);
|
||
return;
|
||
}
|
||
char *buf = smalloc(stbuf.st_size);
|
||
int n = fread(buf, 1, stbuf.st_size, f);
|
||
if (n != stbuf.st_size) {
|
||
ELOG("File \"%s\" could not be read entirely, not loading.\n", filename);
|
||
fclose(f);
|
||
return;
|
||
}
|
||
DLOG("read %d bytes\n", n);
|
||
yajl_gen g;
|
||
yajl_handle hand;
|
||
static yajl_callbacks callbacks = {
|
||
.yajl_boolean = json_bool,
|
||
.yajl_integer = json_int,
|
||
.yajl_double = json_double,
|
||
.yajl_string = json_string,
|
||
.yajl_start_map = json_start_map,
|
||
.yajl_map_key = json_key,
|
||
.yajl_end_map = json_end_map,
|
||
.yajl_end_array = json_end_array,
|
||
};
|
||
g = yajl_gen_alloc(NULL);
|
||
hand = yajl_alloc(&callbacks, NULL, (void *)g);
|
||
/* Allowing comments allows for more user-friendly layout files. */
|
||
yajl_config(hand, yajl_allow_comments, true);
|
||
/* Allow multiple values, i.e. multiple nodes to attach */
|
||
yajl_config(hand, yajl_allow_multiple_values, true);
|
||
yajl_status stat;
|
||
json_node = con;
|
||
to_focus = NULL;
|
||
parsing_swallows = false;
|
||
parsing_rect = false;
|
||
parsing_deco_rect = false;
|
||
parsing_window_rect = false;
|
||
parsing_geometry = false;
|
||
parsing_focus = 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);
|
||
ELOG("JSON parsing error: %s\n", str);
|
||
if (errormsg != NULL)
|
||
*errormsg = sstrdup((const char *)str);
|
||
yajl_free_error(hand, str);
|
||
}
|
||
|
||
/* In case not all containers were restored, we need to fix the
|
||
* percentages, otherwise i3 will crash immediately when rendering the
|
||
* next time. */
|
||
con_fix_percent(con);
|
||
|
||
setlocale(LC_NUMERIC, "");
|
||
yajl_complete_parse(hand);
|
||
|
||
fclose(f);
|
||
if (to_focus)
|
||
con_focus(to_focus);
|
||
}
|