f1c2262ff6
This allows the config to be exactly as verbose as kiwmi, or to change the verbosity level at runtime (e.g. using kiwmic). It uses numbers, because they are much easier to handle on both sides and add only little inconvenience to the user.
379 lines
8.3 KiB
Markdown
379 lines
8.3 KiB
Markdown
# Lua API Documentation
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kiwmi is configured completely in Lua.
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All types kiwmi offers are actually reference types, pointing to the actual internal types.
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This means Lua's garbage collection has no effect on the lifetime of the object.
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kiwmi offers the following classes to work with:
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## Globals
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### `FROM_KIWMIC`
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`true` when invoked from kiwmic, `false` otherwise.
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## kiwmi_server
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This is the type of the global `kiwmi` singleton, representing the compositor.
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This is the entry point to the API.
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### Methods
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#### kiwmi:active_output()
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Returns the active `kiwmi_output`.
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See `request_active_output`.
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#### kiwmi:cursor()
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Returns a reference to the cursor object.
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#### kiwmi:focused_view()
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Returns the currently focused view.
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#### kiwmi:output_at(lx, ly)
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Returns the output at a specified position
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#### kiwmi:on(event, callback)
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Used to register event listeners.
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#### kiwmi:quit()
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Quit kiwmi.
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#### kiwmi:schedule(delay, callback)
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Call `callback` after `delay` ms.
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Callback get passed itself, so that it can easily reregister itself.
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#### kiwmi:set_verbosity(level)
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Sets verbosity of kiwmi to the level specified with a number (see `kiwmi:verbosity()`).
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#### kiwmi:spawn(command)
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Spawn a new process.
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`command` is passed to `/bin/sh`.
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#### kiwmi:stop_interactive()
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Stops an interactive move or resize.
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#### kiwmi:unfocus()
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Unfocus the currently focused view.
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#### kiwmi:verbosity()
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Returns the numerical verbosity level of kiwmi (value of one of `wlr_log_importance`, silent = 0, error = 1, info = 2, debug = 3).
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#### kiwmi:view_at(lx, ly)
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Get the view at a specified position.
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### Events
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#### keyboard
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A new keyboard got attached.
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Callback receives a reference to the keyboard.
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#### request_active_output
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Called when the active output needs to be requested (for example because a layer-shell surface needs to be positioned).
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Callback receives nothing and optionally returns a kiwmi_output.
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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.
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#### output
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A new output got attached.
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Callback receives a reference to the output.
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#### view
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A new view got created (actually mapped).
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Callback receives a reference to the view.
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## kiwmi_cursor
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A reference to the cursor object.
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### Methods
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#### cursor:output_at_pos()
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Returns the output at the cursor position or `nil` if there is none.
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#### cursor:on(event, callback)
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Used to register event listeners.
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#### cursor:pos()
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Get the current position of the cursor.
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Returns two parameters: `x` and `y`.
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#### cursor:view_at_pos()
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Returns the view at the cursor position, or `nil` if there is none.
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### Events
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#### button_down
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A mouse button got pressed.
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Callback receives the ID of the button (i.e. LMB is 1, RMB is 2, ...).
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The callback is supposed to return `true` if the event was handled.
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The compositor will not forward it to the view under the cursor.
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#### button_up
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A mouse button got released.
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Callback receives the ID of the button (i.e. LMB is 1, RMB is 2, ...).
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The callback is supposed to return `true` if the event was handled.
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The compositor will not forward it to the view under the cursor.
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#### motion
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The cursor got moved.
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Callback receives a table containing `oldx`, `oldy`, `newx`, and `newy`.
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## kiwmi_keyboard
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A handle to a keyboard.
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### Methods
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#### keyboard:keymap(keymap)
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The function takes a table as parameter.
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The possible table indexes are "rules, model, layout, variant, options".
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All the table parameters are optional and set to the system default if not set.
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For the values to set have a look at the xkbcommon library.
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<https://xkbcommon.org/doc/current/structxkb__rule__names.html>
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#### keyboard:modifiers()
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Returns a table with the state of all modifiers.
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These are: `shift`, `caps`, `ctrl`, `alt`, `mod2`, `mod3`, `super`, and `mod5`.
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#### keyboard:on(event, callback)
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Used to register event listeners.
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### Events
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#### destroy
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The keyboard is getting destroyed.
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Callback receives the keyboard.
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#### key_down
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A key got pressed.
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Callback receives a table containing the `key`, `keycode`, `raw`, and the `keyboard`.
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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`.
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The callback is supposed to return `true` if the event was handled.
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The compositor will not forward it to the focused view in that case.
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#### key_up
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A key got released.
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Callback receives a table containing the `key`, `keycode`, `raw`, and the `keyboard`.
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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`.
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The callback is supposed to return `true` if the event was handled.
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The compositor will not forward it to the focused view in that case.
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## kiwmi_lua_callback
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A handle to a registered callback.
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## kiwmi_output
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Represents an output (most often a display).
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### Methods
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#### output:auto()
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Tells the compositor to start automatically positioning the output (this is on per default).
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#### output:move(lx, ly)
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Moves the output to a specified position.
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This is referring to the top-left corner.
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#### output:name()
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The name of the output.
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#### output:on(event, callbacks)
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Used to register event listeners.
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#### output:pos()
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Get the position of the output.
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Returns two parameters: `x` and `y`.
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#### output:size()
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Get the size of the output.
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Returns two parameters: `width` and `height`.
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#### output:usable_area()
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Returns a table containing the `x`, `y`, `width` and `height` of the output's usable area, relative to the output's top left corner.
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### Events
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#### destroy
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The output is getting destroyed.
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Callback receives the output.
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#### resize
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The output is being resized.
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Callback receives a table containing the `output`, the new `width`, and the new `height`.
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#### usable_area_change
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The usable area of this output has changed, e.g. because the output was resized or the bars around it changed.
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Callback receives a table containing the `output` and the new `x`, `y`, `width` and `height`.
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## kiwmi_renderer
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Represents a rendering context, to draw on the output.
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### Methods
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#### renderer:draw_rect(color, x, y, w, h)
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Draws a rect at the given position.
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Color is a string in the form #rrggbb or #rrggbbaa.
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## kiwmi_view
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Represents a view (a window in kiwmi terms).
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### Methods
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#### view:app_id()
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Returns the app id of the view.
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This is comparable to the window class of X windows.
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#### view:close()
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Closes the view.
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#### view:csd(client_draws)
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Set whether the client is supposed to draw their own client decoration.
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#### view:focus()
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Focuses the view.
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#### view:hidden()
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Returns `true` if the view is hidden, `false` otherwise.
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#### view:hide()
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Hides the view.
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#### view:id()
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Returns an ID unique to the view.
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#### view:imove()
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Starts an interactive move.
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#### view:iresize(edges)
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Starts an interactive resize.
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Takes a table containing the edges, that the resize is happening on.
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#### view:move(lx, ly)
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Moves the view to the specified position.
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#### view:on(event, callback)
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Used to register event listeners.
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#### view:pid()
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Returns the process ID of the client associated with the view.
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#### view:pos()
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Returns the position of the view (top-left corner).
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#### view:resize(width, height)
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Resizes the view.
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#### view:show()
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Unhides the view.
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#### view:size()
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Returns the size of the view.
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**NOTE**: Used directly after `view:resize()`, this still returns the old size.
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#### view:tiled(edges)
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Takes a table containing all edges that are tiled, or a bool to indicate all 4 edges.
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#### view:title()
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Returns the title of the view.
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### Events
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#### destroy
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The view is being destroyed.
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Callback receives the view.
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#### post_render
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The view finished being rendered.
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Callback receives a table with the `view`, the `renderer` and the `output`.
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This event occurs once per output the view might be drawn on.
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#### pre_render
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The view is about to be rendered.
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Callback receives a table with the `view`, the `renderer` and the `output`.
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This event occurs once per output the view might be drawn on.
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#### request_move
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The view wants to start an interactive move.
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Callback receives the view.
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#### request_resize
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The view wants to start an interactive resize.
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Callback receives a table containing the `view`, and `edges`, containing the edges.
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