sway/swaybar/tray/sni.c

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C
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#define _XOPEN_SOURCE 500
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <dbus/dbus.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include "swaybar/tray/dbus.h"
#include "swaybar/tray/sni.h"
#include "swaybar/tray/icon.h"
#include "swaybar/bar.h"
#include "client/cairo.h"
#include "log.h"
// Not sure what this is but cairo needs it.
static const cairo_user_data_key_t cairo_user_data_key;
struct sni_icon_ref *sni_icon_ref_create(struct StatusNotifierItem *item,
int height) {
struct sni_icon_ref *sni_ref = malloc(sizeof(struct sni_icon_ref));
if (!sni_ref) {
return NULL;
}
sni_ref->icon = cairo_image_surface_scale(item->image, height, height);
sni_ref->ref = item;
return sni_ref;
}
void sni_icon_ref_free(struct sni_icon_ref *sni_ref) {
if (!sni_ref) {
return;
}
cairo_surface_destroy(sni_ref->icon);
free(sni_ref);
}
/* Gets the pixmap of an icon */
static void reply_icon(DBusPendingCall *pending, void *_data) {
struct StatusNotifierItem *item = _data;
DBusMessage *reply = dbus_pending_call_steal_reply(pending);
if (!reply) {
sway_log(L_ERROR, "Did not get reply");
goto bail;
}
int message_type = dbus_message_get_type(reply);
if (message_type == DBUS_MESSAGE_TYPE_ERROR) {
char *msg;
dbus_message_get_args(reply, NULL,
DBUS_TYPE_STRING, &msg,
DBUS_TYPE_INVALID);
sway_log(L_ERROR, "Message is error: %s", msg);
goto bail;
}
DBusMessageIter iter;
DBusMessageIter variant; /* v[a(iiay)] */
DBusMessageIter array; /* a(iiay) */
DBusMessageIter d_struct; /* (iiay) */
DBusMessageIter icon; /* ay */
dbus_message_iter_init(reply, &iter);
// Each if here checks the types above before recursing
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
sway_log(L_ERROR, "Relpy type incorrect");
sway_log(L_ERROR, "Should be \"v\", is \"%s\"",
dbus_message_iter_get_signature(&iter));
goto bail;
}
dbus_message_iter_recurse(&iter, &variant);
if (strcmp("a(iiay)", dbus_message_iter_get_signature(&variant)) != 0) {
sway_log(L_ERROR, "Relpy type incorrect");
sway_log(L_ERROR, "Should be \"a(iiay)\", is \"%s\"",
dbus_message_iter_get_signature(&variant));
goto bail;
}
if (dbus_message_iter_get_element_count(&variant) == 0) {
// Can't recurse if there are no items
sway_log(L_INFO, "Item has no icon");
goto bail;
}
dbus_message_iter_recurse(&variant, &array);
dbus_message_iter_recurse(&array, &d_struct);
int width;
dbus_message_iter_get_basic(&d_struct, &width);
dbus_message_iter_next(&d_struct);
int height;
dbus_message_iter_get_basic(&d_struct, &height);
dbus_message_iter_next(&d_struct);
int len = dbus_message_iter_get_element_count(&d_struct);
if (!len) {
sway_log(L_ERROR, "No icon data");
goto bail;
}
// Also implies len % 4 == 0, useful below
if (len != width * height * 4) {
sway_log(L_ERROR, "Incorrect array size passed");
goto bail;
}
dbus_message_iter_recurse(&d_struct, &icon);
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
// FIXME support a variable stride
// (works on my machine though for all tested widths)
if (!sway_assert(stride == width * 4, "Stride must be equal to byte length")) {
goto bail;
}
// Data is by reference, no need to free
uint8_t *message_data;
dbus_message_iter_get_fixed_array(&icon, &message_data, &len);
uint8_t *image_data = malloc(stride * height);
if (!image_data) {
sway_log(L_ERROR, "Could not allocate memory for icon");
goto bail;
}
// Transform from network byte order to host byte order
// Assumptions are safe because the equality above
uint32_t *network = (uint32_t *) message_data;
uint32_t *host = (uint32_t *)image_data;
for (int i = 0; i < width * height; ++i) {
host[i] = ntohl(network[i]);
}
cairo_surface_t *image = cairo_image_surface_create_for_data(
image_data, CAIRO_FORMAT_ARGB32,
width, height, stride);
if (image) {
if (item->image) {
cairo_surface_destroy(item->image);
}
item->image = image;
// Free the image data on surface destruction
cairo_surface_set_user_data(image,
&cairo_user_data_key,
image_data,
free);
item->dirty = true;
dirty = true;
dbus_message_unref(reply);
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dbus_pending_call_unref(pending);
return;
} else {
sway_log(L_ERROR, "Could not create image surface");
free(image_data);
}
bail:
if (reply) {
dbus_message_unref(reply);
}
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dbus_pending_call_unref(pending);
sway_log(L_ERROR, "Could not get icon from item");
return;
}
static void send_icon_msg(struct StatusNotifierItem *item) {
DBusPendingCall *pending;
DBusMessage *message = dbus_message_new_method_call(
item->name,
"/StatusNotifierItem",
"org.freedesktop.DBus.Properties",
"Get");
const char *iface;
if (item->kde_special_snowflake) {
iface = "org.kde.StatusNotifierItem";
} else {
iface = "org.freedesktop.StatusNotifierItem";
}
const char *prop = "IconPixmap";
dbus_message_append_args(message,
DBUS_TYPE_STRING, &iface,
DBUS_TYPE_STRING, &prop,
DBUS_TYPE_INVALID);
bool status =
dbus_connection_send_with_reply(conn, message, &pending, -1);
dbus_message_unref(message);
if (!(pending || status)) {
sway_log(L_ERROR, "Could not get item icon");
return;
}
dbus_pending_call_set_notify(pending, reply_icon, item, NULL);
}
/* Get an icon by its name */
static void reply_icon_name(DBusPendingCall *pending, void *_data) {
struct StatusNotifierItem *item = _data;
DBusMessage *reply = dbus_pending_call_steal_reply(pending);
if (!reply) {
sway_log(L_INFO, "Got no icon name reply from item");
goto bail;
}
int message_type = dbus_message_get_type(reply);
if (message_type == DBUS_MESSAGE_TYPE_ERROR) {
char *msg;
dbus_message_get_args(reply, NULL,
DBUS_TYPE_STRING, &msg,
DBUS_TYPE_INVALID);
sway_log(L_INFO, "Could not get icon name: %s", msg);
goto bail;
}
DBusMessageIter iter; /* v[s] */
DBusMessageIter variant; /* s */
dbus_message_iter_init(reply, &iter);
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
sway_log(L_ERROR, "Relpy type incorrect");
sway_log(L_ERROR, "Should be \"v\", is \"%s\"",
dbus_message_iter_get_signature(&iter));
goto bail;
}
dbus_message_iter_recurse(&iter, &variant);
if (dbus_message_iter_get_arg_type(&variant) != DBUS_TYPE_STRING) {
sway_log(L_ERROR, "Relpy type incorrect");
sway_log(L_ERROR, "Should be \"s\", is \"%s\"",
dbus_message_iter_get_signature(&iter));
goto bail;
}
char *icon_name;
dbus_message_iter_get_basic(&variant, &icon_name);
cairo_surface_t *image = find_icon(icon_name, 256);
if (image) {
sway_log(L_DEBUG, "Icon for %s found with size %d", icon_name,
cairo_image_surface_get_width(image));
if (item->image) {
cairo_surface_destroy(item->image);
}
item->image = image;
item->dirty = true;
dirty = true;
dbus_message_unref(reply);
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dbus_pending_call_unref(pending);
return;
}
bail:
if (reply) {
dbus_message_unref(reply);
}
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dbus_pending_call_unref(pending);
// Now try the pixmap
send_icon_msg(item);
return;
}
static void send_icon_name_msg(struct StatusNotifierItem *item) {
DBusPendingCall *pending;
DBusMessage *message = dbus_message_new_method_call(
item->name,
"/StatusNotifierItem",
"org.freedesktop.DBus.Properties",
"Get");
const char *iface;
if (item->kde_special_snowflake) {
iface = "org.kde.StatusNotifierItem";
} else {
iface = "org.freedesktop.StatusNotifierItem";
}
const char *prop = "IconName";
dbus_message_append_args(message,
DBUS_TYPE_STRING, &iface,
DBUS_TYPE_STRING, &prop,
DBUS_TYPE_INVALID);
bool status =
dbus_connection_send_with_reply(conn, message, &pending, -1);
dbus_message_unref(message);
if (!(pending || status)) {
sway_log(L_ERROR, "Could not get item icon name");
return;
}
dbus_pending_call_set_notify(pending, reply_icon_name, item, NULL);
}
void get_icon(struct StatusNotifierItem *item) {
send_icon_name_msg(item);
}
void sni_activate(struct StatusNotifierItem *item, uint32_t x, uint32_t y) {
const char *iface =
(item->kde_special_snowflake ? "org.kde.StatusNotifierItem"
: "org.freedesktop.StatusNotifierItem");
DBusMessage *message = dbus_message_new_method_call(
item->name,
"/StatusNotifierItem",
iface,
"Activate");
dbus_message_append_args(message,
DBUS_TYPE_INT32, &x,
DBUS_TYPE_INT32, &y,
DBUS_TYPE_INVALID);
dbus_connection_send(conn, message, NULL);
dbus_message_unref(message);
}
void sni_context_menu(struct StatusNotifierItem *item, uint32_t x, uint32_t y) {
const char *iface =
(item->kde_special_snowflake ? "org.kde.StatusNotifierItem"
: "org.freedesktop.StatusNotifierItem");
DBusMessage *message = dbus_message_new_method_call(
item->name,
"/StatusNotifierItem",
iface,
"ContextMenu");
dbus_message_append_args(message,
DBUS_TYPE_INT32, &x,
DBUS_TYPE_INT32, &y,
DBUS_TYPE_INVALID);
dbus_connection_send(conn, message, NULL);
dbus_message_unref(message);
}
void sni_secondary(struct StatusNotifierItem *item, uint32_t x, uint32_t y) {
const char *iface =
(item->kde_special_snowflake ? "org.kde.StatusNotifierItem"
: "org.freedesktop.StatusNotifierItem");
DBusMessage *message = dbus_message_new_method_call(
item->name,
"/StatusNotifierItem",
iface,
"SecondaryActivate");
dbus_message_append_args(message,
DBUS_TYPE_INT32, &x,
DBUS_TYPE_INT32, &y,
DBUS_TYPE_INVALID);
dbus_connection_send(conn, message, NULL);
dbus_message_unref(message);
}
static void get_unique_name(struct StatusNotifierItem *item) {
// I think that we're fine being sync here becaues the message is
// directly to the message bus. Could be async though.
DBusMessage *message = dbus_message_new_method_call(
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"GetNameOwner");
dbus_message_append_args(message,
DBUS_TYPE_STRING, &item->name,
DBUS_TYPE_INVALID);
DBusMessage *reply = dbus_connection_send_with_reply_and_block(
conn, message, -1, NULL);
dbus_message_unref(message);
if (!reply) {
sway_log(L_ERROR, "Could not get unique name for item: %s",
item->name);
return;
}
char *unique_name;
if (!dbus_message_get_args(reply, NULL,
DBUS_TYPE_STRING, &unique_name,
DBUS_TYPE_INVALID)) {
sway_log(L_ERROR, "Error parsing method args");
} else {
if (item->unique_name) {
free(item->unique_name);
}
item->unique_name = strdup(unique_name);
}
dbus_message_unref(reply);
}
struct StatusNotifierItem *sni_create(const char *name) {
// Make sure `name` is well formed
if (!dbus_validate_bus_name(name, NULL)) {
sway_log(L_INFO, "Name (%s) is not a bus name. We cannot create an item.", name);
return NULL;
}
struct StatusNotifierItem *item = malloc(sizeof(struct StatusNotifierItem));
item->name = strdup(name);
item->unique_name = NULL;
item->image = NULL;
item->dirty = false;
// If it doesn't use this name then assume that it uses the KDE spec
// This is because xembed-sni-proxy uses neither "org.freedesktop" nor
// "org.kde" and just gives us the items "unique name"
//
// We could use this to our advantage and fill out the "unique name"
// field with the given name if it is neither freedesktop or kde, but
// that's makes us rely on KDE hackyness which is bad practice
const char freedesktop_name[] = "org.freedesktop";
if (strncmp(name, freedesktop_name, sizeof(freedesktop_name) - 1) != 0) {
item->kde_special_snowflake = true;
} else {
item->kde_special_snowflake = false;
}
get_icon(item);
get_unique_name(item);
return item;
}
/* Return 0 if `item` has a name of `str` */
int sni_str_cmp(const void *_item, const void *_str) {
const struct StatusNotifierItem *item = _item;
const char *str = _str;
return strcmp(item->name, str);
}
/* Returns 0 if `item` has a unique name of `str` */
int sni_uniq_cmp(const void *_item, const void *_str) {
const struct StatusNotifierItem *item = _item;
const char *str = _str;
if (!item->unique_name) {
return false;
}
return strcmp(item->unique_name, str);
}
void sni_free(struct StatusNotifierItem *item) {
if (!item) {
return;
}
free(item->name);
if (item->unique_name) {
free(item->unique_name);
}
if (item->image) {
cairo_surface_destroy(item->image);
}
free(item);
}