Here are the data structures with brief descriptions:
[detail level 12]
  Assignment | An Assignment makes specific windows go to a specific workspace/output or run a command for that window |
| Autostart | Holds a command specified by either an: |
| Barbinding | Defines a mouse command to be executed instead of the default behavior when clicking on the non-statusline part of i3bar |
 Barconfig | Holds the status bar configuration (i3bar) |
  bar_colors | |
| bfs_entry | |
| Binding | Holds a keybinding, consisting of a keycode combined with modifiers and the command which is executed as soon as the key is pressed (see src/config_parser.c) |
| callback_params | |
| color_t | |
| Colortriple | Part of the struct Config |
| CommandResult | A struct that contains useful information about the result of a command as a whole (e.g |
| CommandResultIR | |
| Con | A 'Con' represents everything from the X11 root window down to a single X11 window |
| con_state | |
| Config | Holds part of the configuration (the part which is not already in dedicated structures in include/data.h) |
| config_bar | |
| config_client | |
| ConfigResultIR | |
| context | Used during the config file lexing/parsing to keep the state of the lexer in order to provide useful error messages in yyerror() |
| deco_render_params | Stores the parameters for rendering a window decoration |
| drag_x11_cb | |
| focus_mapping | |
| Font | Data structure for cached font information: |
| i3_shmlog_header | |
| Ignore_Event | |
| ipc_client | |
| mark_t | |
| Match | A "match" is a data structure which acts like a mask or expression to match certain windows or not |
| Mode | The configuration file can contain multiple sets of bindings |
| owindow | |
| placeholder_state | |
| placeholder_t | Helper structure for usage in format_placeholders() |
| property_handler_t | |
| Rect | Stores a rectangle, for example the size of a window, the child window etc |
| regex | Regular expression wrapper |
| render_params | |
| reservedpx | Stores the reserved pixels on each screen edge read from a _NET_WM_STRUT_PARTIAL |
| resize_window_callback_params | |
| resolve | |
| sockaddr_union | |
| stack_entry | |
| Startup_Sequence | Stores internal information about a startup sequence, like the workspace it was initiated on |
| surface_t | |
| token | |
| tokenptr | |
| tray_output_t | |
| Variable | Holds a user-assigned variable for parsing the configuration file |
| width_height | Stores a width/height pair, used as part of deco_render_params to check whether the rects width/height have changed |
| Window | A 'Window' is a type which contains an xcb_window_t and all the related information (hints like _NET_WM_NAME for that window) |
| Workspace_Assignment | Stores which workspace (by name or number) goes to which output |
| xoutput | An Output is a physical output on your graphics driver |
