kiwmi/lua_docs.md

Lua API Documentation

kiwmi is configured completely in Lua. All types kiwmi offers are actually reference types, pointing to the actual internal types. This means Lua's garbage collection has no effect on the lifetime of the object.

kiwmi offers the following classes to work with:

Globals

FROM_KIWMIC

true when invoked from kiwmic, false otherwise.

kiwmi_server

This is the type of the global kiwmi singleton, representing the compositor. This is the entry point to the API.

Methods

kiwmi:active_output()

Returns the active kiwmi_output.

See request_active_output.

kiwmi:cursor()

Returns a reference to the cursor object.

kiwmi:focused_view()

Returns the currently focused view.

kiwmi:output_at(lx, ly)

Returns the output at a specified position

kiwmi:on(event, callback)

Used to register event listeners.

kiwmi:quit()

Quit kiwmi.

kiwmi:bg_color(color)

Sets the background color (shown behind all views) to color (in the format #rrggbb).

kiwmi:schedule(delay, callback)

Call callback after delay ms. Callback get passed itself, so that it can easily reregister itself.

kiwmi:spawn(command)

Spawn a new process. command is passed to /bin/sh.

kiwmi:stop_interactive()

Stops an interactive move or resize.

kiwmi:unfocus()

Unfocus the currently focused view.

kiwmi:view_at(lx, ly)

Get the view at a specified position.

Events

keyboard

A new keyboard got attached. Callback receives a reference to the keyboard.

request_active_output

Called when the active output needs to be requested (for example because a layer-shell surface needs to be positioned). Callback receives nothing and optionally returns a kiwmi_output.

If this isn't set or returns nil, the compositor defaults to the output the focused view is on, and if there is no view, the output the mouse is on.

output

A new output got attached. Callback receives a reference to the output.

view

A new view got created (actually mapped). Callback receives a reference to the view.

kiwmi_cursor

A reference to the cursor object.

Methods

cursor:output_at_pos()

Returns the output at the cursor position or nil if there is none.

cursor:on(event, callback)

Used to register event listeners.

cursor:pos()

Get the current position of the cursor. Returns two parameters: x and y.

cursor:view_at_pos()

Returns the view at the cursor position, or nil if there is none.

Events

button_down

A mouse button got pressed. Callback receives the ID of the button (i.e. LMB is 1, RMB is 2, ...).

The callback is supposed to return true if the event was handled. The compositor will not forward it to the view under the cursor.

button_up

A mouse button got released. Callback receives the ID of the button (i.e. LMB is 1, RMB is 2, ...).

The callback is supposed to return true if the event was handled. The compositor will not forward it to the view under the cursor.

motion

The cursor got moved. Callback receives a table containing oldx, oldy, newx, and newy.

kiwmi_keyboard

A handle to a keyboard.

Methods

keyboard:keymap(keymap)

The function takes a table as parameter. The possible table indexes are "rules, model, layout, variant, options". All the table parameters are optional and set to the system default if not set. For the values to set have a look at the xkbcommon library. https://xkbcommon.org/doc/current/structxkb__rule__names.html

keyboard:modifiers()

Returns a table with the state of all modifiers. These are: shift, caps, ctrl, alt, mod2, mod3, super, and mod5.

keyboard:on(event, callback)

Used to register event listeners.

Events

destroy

The keyboard is getting destroyed. Callback receives the keyboard.

key_down

A key got pressed.

Callback receives a table containing the key, keycode, raw, and the keyboard.

This event gets triggered twice, once with mods applied (i.e. Shift+3 is #) and raw set to false, and then again with no mods applied and raw set to true.

The callback is supposed to return true if the event was handled. The compositor will not forward it to the focused view in that case.

key_up

A key got released. Callback receives a table containing the key, keycode, raw, and the keyboard.

This event gets triggered twice, once with mods applied (i.e. Shift+3 is #) and raw set to false, and then again with no mods applied and raw set to true.

The callback is supposed to return true if the event was handled. The compositor will not forward it to the focused view in that case.

kiwmi_lua_callback

A handle to a registered callback.

kiwmi_output

Represents an output (most often a display).

Methods

output:auto()

Tells the compositor to start automatically positioning the output (this is on per default).

output:move(lx, ly)

Moves the output to a specified position. This is referring to the top-left corner.

output:name()

The name of the output.

output:on(event, callbacks)

Used to register event listeners.

output:pos()

Get the position of the output. Returns two parameters: x and y.

output:size()

Get the size of the output. Returns two parameters: width and height.

output:usable_area()

Returns a table containing the x, y, width and height of the output's usable area, relative to the output's top left corner.

Events

destroy

The output is getting destroyed. Callback receives the output.

resize

The output is being resized. Callback receives a table containing the output, the new width, and the new height.

usable_area_change

The usable area of this output has changed, e.g. because the output was resized or the bars around it changed. Callback receives a table containing the output and the new x, y, width and height.

kiwmi_renderer

Represents a rendering context, to draw on the output.

Methods

renderer:draw_rect(color, x, y, w, h)

Draws a rect at the given position. Color is a string in the form #rrggbb or #rrggbbaa.

kiwmi_view

Represents a view (a window in kiwmi terms).

Methods

view:app_id()

Returns the app id of the view. This is comparable to the window class of X windows.

view:close()

Closes the view.

view:csd(client_draws)

Set whether the client is supposed to draw their own client decoration.

view:focus()

Focuses the view.

view:hidden()

Returns true if the view is hidden, false otherwise.

view:hide()

Hides the view.

view:id()

Returns an ID unique to the view.

view:imove()

Starts an interactive move.

view:iresize(edges)

Starts an interactive resize. Takes a table containing the edges, that the resize is happening on.

view:move(lx, ly)

Moves the view to the specified position.

view:on(event, callback)

Used to register event listeners.

view:pid()

Returns the process ID of the client associated with the view.

view:pos()

Returns the position of the view (top-left corner).

view:resize(width, height)

Resizes the view.

view:show()

Unhides the view.

view:size()

Returns the size of the view.

NOTE: Used directly after view:resize(), this still returns the old size.

view:tiled(edges)

Takes a table containing all edges that are tiled, or a bool to indicate all 4 edges.

view:title()

Returns the title of the view.

Events

destroy

The view is being destroyed. Callback receives the view.

post_render

The view finished being rendered. Callback receives a table with the view, the renderer and the output.

This event occurs once per output the view might be drawn on.

pre_render

The view is about to be rendered. Callback receives a table with the view, the renderer and the output.

This event occurs once per output the view might be drawn on.

request_move

The view wants to start an interactive move. Callback receives the view.

request_resize

The view wants to start an interactive resize. Callback receives a table containing the view, and edges, containing the edges.