This is a fork of https://github.com/swaywm/sway that replaces pango with https://codeberg.org/dnkl/fcft for font rendering. Note: do not use the master branch; use one of the fontconfig branches
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#define _POSIX_C_SOURCE 200809L
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <wlr/types/wlr_buffer.h>
#include "sway/config.h"
#include "sway/desktop.h"
#include "sway/desktop/idle_inhibit_v1.h"
#include "sway/desktop/transaction.h"
#include "sway/input/cursor.h"
#include "sway/input/input-manager.h"
#include "sway/output.h"
#include "sway/tree/container.h"
#include "sway/tree/node.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
#include "list.h"
#include "log.h"
struct sway_transaction {
struct wl_event_source *timer;
list_t *instructions; // struct sway_transaction_instruction *
size_t num_waiting;
size_t num_configures;
struct timespec commit_time;
};
struct sway_transaction_instruction {
struct sway_transaction *transaction;
struct sway_node *node;
union {
struct sway_output_state output_state;
struct sway_workspace_state workspace_state;
struct sway_container_state container_state;
};
uint32_t serial;
bool server_request;
bool waiting;
};
static struct sway_transaction *transaction_create(void) {
struct sway_transaction *transaction =
calloc(1, sizeof(struct sway_transaction));
if (!sway_assert(transaction, "Unable to allocate transaction")) {
return NULL;
}
transaction->instructions = create_list();
return transaction;
}
static void transaction_destroy(struct sway_transaction *transaction) {
// Free instructions
for (int i = 0; i < transaction->instructions->length; ++i) {
struct sway_transaction_instruction *instruction =
transaction->instructions->items[i];
struct sway_node *node = instruction->node;
node->ntxnrefs--;
if (node->instruction == instruction) {
node->instruction = NULL;
}
if (node->destroying && node->ntxnrefs == 0) {
switch (node->type) {
case N_ROOT:
sway_assert(false, "Never reached");
break;
case N_OUTPUT:
output_destroy(node->sway_output);
break;
case N_WORKSPACE:
workspace_destroy(node->sway_workspace);
break;
case N_CONTAINER:
container_destroy(node->sway_container);
break;
}
}
free(instruction);
}
list_free(transaction->instructions);
if (transaction->timer) {
wl_event_source_remove(transaction->timer);
}
free(transaction);
}
static void copy_output_state(struct sway_output *output,
struct sway_transaction_instruction *instruction) {
struct sway_output_state *state = &instruction->output_state;
if (state->workspaces) {
state->workspaces->length = 0;
} else {
state->workspaces = create_list();
}
list_cat(state->workspaces, output->workspaces);
state->active_workspace = output_get_active_workspace(output);
}
static void copy_workspace_state(struct sway_workspace *ws,
struct sway_transaction_instruction *instruction) {
struct sway_workspace_state *state = &instruction->workspace_state;
state->fullscreen = ws->fullscreen;
state->x = ws->x;
state->y = ws->y;
state->width = ws->width;
state->height = ws->height;
state->layout = ws->layout;
state->output = ws->output;
if (state->floating) {
state->floating->length = 0;
} else {
state->floating = create_list();
}
if (state->tiling) {
state->tiling->length = 0;
} else {
state->tiling = create_list();
}
list_cat(state->floating, ws->floating);
list_cat(state->tiling, ws->tiling);
struct sway_seat *seat = input_manager_current_seat();
state->focused = seat_get_focus(seat) == &ws->node;
// Set focused_inactive_child to the direct tiling child
struct sway_container *focus = seat_get_focus_inactive_tiling(seat, ws);
if (focus) {
while (focus->pending.parent) {
focus = focus->pending.parent;
}
}
state->focused_inactive_child = focus;
}
static void copy_container_state(struct sway_container *container,
struct sway_transaction_instruction *instruction) {
struct sway_container_state *state = &instruction->container_state;
if (state->children) {
list_free(state->children);
}
memcpy(state, &container->pending, sizeof(struct sway_container_state));
if (!container->view) {
// We store a copy of the child list to avoid having it mutated after
// we copy the state.
state->children = create_list();
list_cat(state->children, container->pending.children);
} else {
state->children = NULL;
}
struct sway_seat *seat = input_manager_current_seat();
state->focused = seat_get_focus(seat) == &container->node;
if (!container->view) {
struct sway_node *focus =
seat_get_active_tiling_child(seat, &container->node);
state->focused_inactive_child = focus ? focus->sway_container : NULL;
}
}
static void transaction_add_node(struct sway_transaction *transaction,
struct sway_node *node, bool server_request) {
struct sway_transaction_instruction *instruction = NULL;
// Check if we have an instruction for this node already, in which case we
// update that instead of creating a new one.
if (node->ntxnrefs > 0) {
for (int idx = 0; idx < transaction->instructions->length; idx++) {
struct sway_transaction_instruction *other =
transaction->instructions->items[idx];
if (other->node == node) {
instruction = other;
break;
}
}
}
if (!instruction) {
instruction = calloc(1, sizeof(struct sway_transaction_instruction));
if (!sway_assert(instruction, "Unable to allocate instruction")) {
return;
}
instruction->transaction = transaction;
instruction->node = node;
instruction->server_request = server_request;
list_add(transaction->instructions, instruction);
node->ntxnrefs++;
} else if (server_request) {
instruction->server_request = true;
}
switch (node->type) {
case N_ROOT:
break;
case N_OUTPUT:
copy_output_state(node->sway_output, instruction);
break;
case N_WORKSPACE:
copy_workspace_state(node->sway_workspace, instruction);
break;
case N_CONTAINER:
copy_container_state(node->sway_container, instruction);
break;
}
}
static void apply_output_state(struct sway_output *output,
struct sway_output_state *state) {
output_damage_whole(output);
list_free(output->current.workspaces);
memcpy(&output->current, state, sizeof(struct sway_output_state));
output_damage_whole(output);
}
static void apply_workspace_state(struct sway_workspace *ws,
struct sway_workspace_state *state) {
output_damage_whole(ws->current.output);
list_free(ws->current.floating);
list_free(ws->current.tiling);
memcpy(&ws->current, state, sizeof(struct sway_workspace_state));
output_damage_whole(ws->current.output);
}
static void apply_container_state(struct sway_container *container,
struct sway_container_state *state) {
struct sway_view *view = container->view;
// Damage the old location
desktop_damage_whole_container(container);
if (view && !wl_list_empty(&view->saved_buffers)) {
struct sway_saved_buffer *saved_buf;
wl_list_for_each(saved_buf, &view->saved_buffers, link) {
struct wlr_box box = {
.x = saved_buf->x - view->saved_geometry.x,
.y = saved_buf->y - view->saved_geometry.y,
.width = saved_buf->width,
.height = saved_buf->height,
};
desktop_damage_box(&box);
}
}
// There are separate children lists for each instruction state, the
// container's current state and the container's pending state
// (ie. con->children). The list itself needs to be freed here.
// Any child containers which are being deleted will be cleaned up in
// transaction_destroy().
list_free(container->current.children);
memcpy(&container->current, state, sizeof(struct sway_container_state));
if (view && !wl_list_empty(&view->saved_buffers)) {
if (!container->node.destroying || container->node.ntxnrefs == 1) {
view_remove_saved_buffer(view);
}
}
// If the view hasn't responded to the configure, center it within
// the container. This is important for fullscreen views which
// refuse to resize to the size of the output.
if (view && view->surface) {
view_center_surface(view);
}
// Damage the new location
desktop_damage_whole_container(container);
if (view && view->surface) {
struct wlr_surface *surface = view->surface;
struct wlr_box box = {
.x = container->current.content_x - view->geometry.x,
.y = container->current.content_y - view->geometry.y,
.width = surface->current.width,
.height = surface->current.height,
};
desktop_damage_box(&box);
}
if (!container->node.destroying) {
container_discover_outputs(container);
}
}
/**
* Apply a transaction to the "current" state of the tree.
*/
static void transaction_apply(struct sway_transaction *transaction) {
sway_log(SWAY_DEBUG, "Applying transaction %p", transaction);
if (debug.txn_timings) {
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
struct timespec *commit = &transaction->commit_time;
float ms = (now.tv_sec - commit->tv_sec) * 1000 +
(now.tv_nsec - commit->tv_nsec) / 1000000.0;
sway_log(SWAY_DEBUG, "Transaction %p: %.1fms waiting "
"(%.1f frames if 60Hz)", transaction, ms, ms / (1000.0f / 60));
}
// Apply the instruction state to the node's current state
for (int i = 0; i < transaction->instructions->length; ++i) {
struct sway_transaction_instruction *instruction =
transaction->instructions->items[i];
struct sway_node *node = instruction->node;
switch (node->type) {
case N_ROOT:
break;
case N_OUTPUT:
apply_output_state(node->sway_output, &instruction->output_state);
break;
case N_WORKSPACE:
apply_workspace_state(node->sway_workspace,
&instruction->workspace_state);
break;
case N_CONTAINER:
apply_container_state(node->sway_container,
&instruction->container_state);
break;
}
node->instruction = NULL;
}
cursor_rebase_all();
}
static void transaction_commit_pending(void);
static void transaction_progress(void) {
if (!server.queued_transaction) {
return;
}
if (server.queued_transaction->num_waiting > 0) {
return;
}
transaction_apply(server.queued_transaction);
transaction_destroy(server.queued_transaction);
server.queued_transaction = NULL;
if (!server.pending_transaction) {
sway_idle_inhibit_v1_check_active(server.idle_inhibit_manager_v1);
return;
}
transaction_commit_pending();
}
static int handle_timeout(void *data) {
struct sway_transaction *transaction = data;
sway_log(SWAY_DEBUG, "Transaction %p timed out (%zi waiting)",
transaction, transaction->num_waiting);
transaction->num_waiting = 0;
transaction_progress();
return 0;
}
static bool should_configure(struct sway_node *node,
struct sway_transaction_instruction *instruction) {
if (!node_is_view(node)) {
return false;
}
if (node->destroying) {
return false;
}
if (!instruction->server_request) {
return false;
}
struct sway_container_state *cstate = &node->sway_container->current;
struct sway_container_state *istate = &instruction->container_state;
#if HAVE_XWAYLAND
// Xwayland views are position-aware and need to be reconfigured
// when their position changes.
if (node->sway_container->view->type == SWAY_VIEW_XWAYLAND) {
// Sway logical coordinates are doubles, but they get truncated to
// integers when sent to Xwayland through `xcb_configure_window`.
// X11 apps will not respond to duplicate configure requests (from their
// truncated point of view) and cause transactions to time out.
if ((int)cstate->content_x != (int)istate->content_x ||
(int)cstate->content_y != (int)istate->content_y) {
return true;
}
}
#endif
if (cstate->content_width == istate->content_width &&
cstate->content_height == istate->content_height) {
return false;
}
return true;
}
static void transaction_commit(struct sway_transaction *transaction) {
sway_log(SWAY_DEBUG, "Transaction %p committing with %i instructions",
transaction, transaction->instructions->length);
transaction->num_waiting = 0;
for (int i = 0; i < transaction->instructions->length; ++i) {
struct sway_transaction_instruction *instruction =
transaction->instructions->items[i];
struct sway_node *node = instruction->node;
bool hidden = node_is_view(node) &&
!view_is_visible(node->sway_container->view);
if (should_configure(node, instruction)) {
instruction->serial = view_configure(node->sway_container->view,
instruction->container_state.content_x,
instruction->container_state.content_y,
instruction->container_state.content_width,
instruction->container_state.content_height);
if (!hidden) {
instruction->waiting = true;
++transaction->num_waiting;
}
// From here on we are rendering a saved buffer of the view, which
// means we can send a frame done event to make the client redraw it
// as soon as possible. Additionally, this is required if a view is
// mapping and its default geometry doesn't intersect an output.
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
wlr_surface_send_frame_done(
node->sway_container->view->surface, &now);
}
if (!hidden && node_is_view(node) &&
wl_list_empty(&node->sway_container->view->saved_buffers)) {
view_save_buffer(node->sway_container->view);
memcpy(&node->sway_container->view->saved_geometry,
&node->sway_container->view->geometry,
sizeof(struct wlr_box));
}
node->instruction = instruction;
}
transaction->num_configures = transaction->num_waiting;
if (debug.txn_timings) {
clock_gettime(CLOCK_MONOTONIC, &transaction->commit_time);
}
if (debug.noatomic) {
transaction->num_waiting = 0;
} else if (debug.txn_wait) {
// Force the transaction to time out even if all views are ready.
// We do this by inflating the waiting counter.
transaction->num_waiting += 1000000;
}
if (transaction->num_waiting) {
// Set up a timer which the views must respond within
transaction->timer = wl_event_loop_add_timer(server.wl_event_loop,
handle_timeout, transaction);
if (transaction->timer) {
wl_event_source_timer_update(transaction->timer,
server.txn_timeout_ms);
} else {
sway_log_errno(SWAY_ERROR, "Unable to create transaction timer "
"(some imperfect frames might be rendered)");
transaction->num_waiting = 0;
}
}
}
static void transaction_commit_pending(void) {
if (server.queued_transaction) {
return;
}
struct sway_transaction *transaction = server.pending_transaction;
server.pending_transaction = NULL;
server.queued_transaction = transaction;
transaction_commit(transaction);
transaction_progress();
}
static void set_instruction_ready(
struct sway_transaction_instruction *instruction) {
struct sway_transaction *transaction = instruction->transaction;
if (debug.txn_timings) {
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
struct timespec *start = &transaction->commit_time;
float ms = (now.tv_sec - start->tv_sec) * 1000 +
(now.tv_nsec - start->tv_nsec) / 1000000.0;
sway_log(SWAY_DEBUG, "Transaction %p: %zi/%zi ready in %.1fms (%s)",
transaction,
transaction->num_configures - transaction->num_waiting + 1,
transaction->num_configures, ms,
instruction->node->sway_container->title);
}
// If the transaction has timed out then its num_waiting will be 0 already.
if (instruction->waiting && transaction->num_waiting > 0 &&
--transaction->num_waiting == 0) {
sway_log(SWAY_DEBUG, "Transaction %p is ready", transaction);
wl_event_source_timer_update(transaction->timer, 0);
}
instruction->node->instruction = NULL;
transaction_progress();
}
void transaction_notify_view_ready_by_serial(struct sway_view *view,
uint32_t serial) {
struct sway_transaction_instruction *instruction =
view->container->node.instruction;
if (instruction != NULL && instruction->serial == serial) {
set_instruction_ready(instruction);
}
}
void transaction_notify_view_ready_by_geometry(struct sway_view *view,
double x, double y, int width, int height) {
struct sway_transaction_instruction *instruction =
view->container->node.instruction;
if (instruction != NULL &&
(int)instruction->container_state.content_x == (int)x &&
(int)instruction->container_state.content_y == (int)y &&
instruction->container_state.content_width == width &&
instruction->container_state.content_height == height) {
set_instruction_ready(instruction);
}
}
static void _transaction_commit_dirty(bool server_request) {
if (!server.dirty_nodes->length) {
return;
}
if (!server.pending_transaction) {
server.pending_transaction = transaction_create();
if (!server.pending_transaction) {
return;
}
}
for (int i = 0; i < server.dirty_nodes->length; ++i) {
struct sway_node *node = server.dirty_nodes->items[i];
transaction_add_node(server.pending_transaction, node, server_request);
node->dirty = false;
}
server.dirty_nodes->length = 0;
transaction_commit_pending();
}
void transaction_commit_dirty(void) {
_transaction_commit_dirty(true);
}
void transaction_commit_dirty_client(void) {
_transaction_commit_dirty(false);
}