sway-patched-tray-menu-github/include/sway/desktop/transaction.h
Ryan Dwyer 60a1d79de7 Rebase the cursor after applying transactions
This approaches cursor rebasing from a different angle. Rather than
littering the codebase with cursor_rebase calls and using transaction
callbacks, this just runs cursor_rebase after applying every transaction
- but only if there's outputs connected, because otherwise it causes a
crash during shutdown.

There is one known case where we still need to call cursor_rebase
directly, and that's when running `seat seat0 cursor move ...`. This
command doesn't set anything as dirty so no transaction occurs.
2018-10-25 23:37:40 +10:00

48 lines
1.6 KiB
C

#ifndef _SWAY_TRANSACTION_H
#define _SWAY_TRANSACTION_H
#include <stdint.h>
/**
* Transactions enable us to perform atomic layout updates.
*
* A transaction contains a list of containers and their new state.
* A state might contain a new size, or new border settings, or new parent/child
* relationships.
*
* Committing a transaction 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.
*
* When we want to make adjustments to the layout, we change the pending state
* in containers, mark them as dirty and call transaction_commit_dirty(). This
* create and commits a transaction from the dirty containers.
*/
struct sway_transaction_instruction;
struct sway_view;
/**
* Find all dirty containers, create and commit a transaction containing them,
* and unmark them as dirty.
*/
void transaction_commit_dirty(void);
/**
* 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_by_serial(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);
#endif