# D-BUS usage in EDE

## Introduction

This document describes D-BUS usage in EDE applications. It is not meant to describe D-BUS protocol nor how to use it via libdbus nor edelib, but to document and explain what programs listen or what data are send via D-BUS protocol.

## Naming convention

EDE uses org.equinoxproject as main namespace for interfaces and object paths, e.g.

      org.equinoxproject.Desktop   # ede-desktop interface
      /org/equinoxproject/Desktop  # ede-desktop object path

Rest of the name will be application name with method or signal name. If application name is not suitable or could not be represented as D-BUS name (or could be ambiguous), it can be replaced with applications functionality (org.equinoxproject.Desktop sounds much better than org.equinoxproject.Ede_Desktop).

Sample:

      org.equinoxproject.Desktop.FooMethod   # FooMethod belongs to ede-desktop

## Interfaces

### org.equinoxproject.Desktop

Used by ede-desktop and access object is /org/eqiunoxproject/Desktop. Provided signals are:

#### DesktopChanged(int32 n, string name)

Name | Type | Description
--- | --- | ---
n | int32 | Desktop number
name | string | Desktop name

Notify when desktop view was changed.

### org.equinoxproject.Emountd

Used by emountd and access object is /org/equinoxproject/Emountd. Provided signals are:

#### Mounted(struct device_info)

device_info contains the following fields:

Name | Type | Description
--- | --- | ---
id | uint32 | Device ID for easier tracking
label | string | Device label (can be empty)
mount_point | string | Device mount point
device_file | string | Device file
drive_type | int32 | Drive type (see Drive types)
cdrom_type | int32 | CDROM type, valid only if drive_type == DRIVE_TYPE_CDROM (see Volume disc types)
read_only | bool | Is device mounted read-only

Notify when storage device was mounted.

#### Unmounted(int32 udi)

Name | Type | Description
--- | --- | ---
id | int32 | Device ID for easier tracking

Notify when storage device was unmounted.

#### AudioCDAdded(struct audio_device_info)

audio_device_info contains the following fields:

Name | Type | Description
--- | --- | ---
id | uint32 | Device ID for easier tracking
label | string | Device label (can be empty)
device_file | string | Device file

Notify when Audio CD was added.

#### AudioCDRemoved(int32 udi)

Name | Type | Description
--- | --- | ---
id | int32 | Device ID for easier tracking

Notify when Audio CD was removed.

Device enumerations directly maps to HAL ones and those values are send in drive_type and cdrom_type (device_info struct).

Drive types:

     DRIVE_TYPE_REMOVABLE_DISK        = 0x00
     DRIVE_TYPE_DISK                  = 0x01
     DRIVE_TYPE_CDROM                 = 0x02
     DRIVE_TYPE_FLOPPY                = 0x03
     DRIVE_TYPE_TAPE                  = 0x04
     DRIVE_TYPE_COMPACT_FLASH         = 0x05
     DRIVE_TYPE_MEMORY_STICK          = 0x06
     DRIVE_TYPE_SMART_MEDIA           = 0x07
     DRIVE_TYPE_SD_MMC                = 0x08
     DRIVE_TYPE_CAMERA                = 0x09
     DRIVE_TYPE_PORTABLE_AUDIO_PLAYER = 0x0a
     DRIVE_TYPE_ZIP                   = 0x0b
     DRIVE_TYPE_JAZ                   = 0x0c
     DRIVE_TYPE_FLASHKEY              = 0x0d
     DRIVE_TYPE_MO                    = 0x0e

Volume disc types:

     VOLUME_DISC_TYPE_CDROM       = 0x00
     VOLUME_DISC_TYPE_CDR         = 0x01
     VOLUME_DISC_TYPE_CDRW        = 0x02
     VOLUME_DISC_TYPE_DVDROM      = 0x03
     VOLUME_DISC_TYPE_DVDRAM      = 0x04
     VOLUME_DISC_TYPE_DVDR        = 0x05
     VOLUME_DISC_TYPE_DVDRW       = 0x06
     VOLUME_DISC_TYPE_DVDPLUSR    = 0x07
     VOLUME_DISC_TYPE_DVDPLUSRW   = 0x08
     VOLUME_DISC_TYPE_DVDPLUSR_DL = 0x09
     VOLUME_DISC_TYPE_BDROM       = 0x0a
     VOLUME_DISC_TYPE_BDR         = 0x0b
     VOLUME_DISC_TYPE_BDRE        = 0x0c
     VOLUME_DISC_TYPE_HDDVDROM    = 0x0d
     VOLUME_DISC_TYPE_HDDVDR      = 0x0e
     VOLUME_DISC_TYPE_HDDVDRW     = 0x0f
     VOLUME_DISC_TYPE_MO          = 0x10

### org.equinoxproject.Shutdown

A general signal emitted when EDE is starting to shut down.

#### Shutdown()

The only member of org.equinoxproject.Shutdown signal.

### org.equinoxproject.Xsettings

This service path exposes XSETTINGS registry. Object path for access service methods is /org/equinoxproject/Xsettings and interface is org.equinoxproject.Xsettings.

#### GetAll()

Returns array of all known keys hold by XSETTINGS manager. Each array item is string type.

#### GetType(string key)

Returns type of the given key. As XSETTINGS knows only three types (int, string and color), returned value will be string holding type name.

Name | Type | Description
--- | --- | ---
key | string | Key name

#### GetValue(string key)

Returns value given key holds. Value can be int32, string or array, depending whay type key is. Array will be returned when key holds color type and array will represent RGBA, where each element holds int32 type.

Name | Type | Description
--- | --- | ---
key | string | Key name

#### Remove(string key)

Removes given key from XSETTINGS registry. If key wasn’t found, the function will do nothing.

Name | Type | Description
--- | --- | ---
key | string | Key name

#### Flush()

Force XSETTINGS manager to store data on disk. This is usually done by manager when exits.

#### Set(string key, type value)

Set key to given value. Here, value can be int32, string or array (4 int32 elements, representing RGBA) and set value will automatically set key value type. Returns true if done successfully or false if not.

Name | Type | Description
--- | --- | ---
key | string | Key name
value | int32, string or int32 array | Value key will hold