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#ifndef _SWAY_TRANSACTION_H
#define _SWAY_TRANSACTION_H
#include <wlr/render/wlr_texture.h>
#include "sway/tree/container.h"
/**
* Transactions enable us to perform atomic layout updates.
*
* When we want to make adjustments to the layout, we create a transaction.
* A transaction contains a list of affected containers and their new state.
* A state might contain a new size, or new border settings, or new parent/child
* relationships.
*
* Calling transaction_commit() makes sway notify of all the affected clients
* with their new sizes. We then wait for all the views to respond with their
* new surface sizes. When all are ready, or when a timeout has passed, we apply
* the updates all at the same time.
*/
struct sway_transaction;
/**
* Create a new transaction.
*/
struct sway_transaction *transaction_create(void);
/**
* Add a container's pending state to the transaction.
*/
void transaction_add_container(struct sway_transaction *transaction,
struct sway_container *container);
/**
* Submit a transaction to the client views for configuration.
*/
void transaction_commit(struct sway_transaction *transaction);
/**
* Notify the transaction system that a view is ready for the new layout.
*
* When all views in the transaction are ready, the layout will be applied.
*/
void transaction_notify_view_ready(struct sway_view *view, uint32_t serial);
/**
* Notify the transaction system that a view is ready for the new layout, but
* identifying the instruction by width and height rather than by serial.
*
* This is used by xwayland views, as they don't have serials.
*/
void transaction_notify_view_ready_by_size(struct sway_view *view,
int width, int height);
/**
* Get the saved texture that should be rendered for a view.
*
* The addresses pointed at by the width and height pointers will be populated
* with the surface's dimensions, which may be different to the texture's
* dimensions if output scaling is used.
*
* This function should only be called if it is known that the view has
* instructions.
*/
struct wlr_texture *transaction_get_saved_texture(struct sway_view *view,
int *width, int *height);
#endif
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