Zedhugh Chen
00df685184
原因：之前的 backend_poll_event 返回 false 有两种情况 1. 当前就绪的事件已全部处理，没有事件可读了 2. 没有可以转化为感兴趣归一化的事件 当返回值为 false 并且时第二种情况时，底层的 xcb 原始事件未处理完，但不 再处理事件。导致有一部分事件一直无法处理，直到下一批事件待处理时通过文 件描述符状态变更唤醒新一轮的事件读取。这就会导致有些事件处理不及时，造 成卡顿的情况。 通过如下措施解决这个问题： 1. backend_poll_event 返回值只表示是否还有事件未处理完 2. event_t 引入 ZDWM_EVENT_NONE 表示事件为空，无人对该事件感兴趣也不需 要清理
509 lines
14 KiB
C
509 lines
14 KiB
C
#include "core/event.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <xcb/xcb.h>
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#include <xcb/xcb_event.h>
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#include <xcb/xcb_icccm.h>
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#include <xcb/xcb_keysyms.h>
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#include <xcb/xproto.h>
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#include "backend/x11/window.h"
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#include "base/macros.h"
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#include "base/memory.h"
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#include "core/backend.h"
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#include "core/types.h"
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#include "core/window.h"
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#include "internal.h"
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static window_state_t *derive_window_states(
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const atoms_t *atoms,
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const xcb_atom_t *raw,
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uint32_t count,
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size_t *out_count
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) {
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if (!raw || count == 0) {
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*out_count = 0;
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return nullptr;
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}
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window_state_t *buf = p_new(window_state_t, count);
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size_t valid = 0;
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for (uint32_t i = 0; i < count; i++) {
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window_state_t s = atom_to_window_state(atoms, raw[i]);
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if (s != (window_state_t)-1) buf[valid++] = s;
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}
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if (valid == 0) {
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p_delete(&buf);
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*out_count = 0;
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return nullptr;
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}
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*out_count = valid;
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return buf;
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}
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static bool derive_skip_taskbar(
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const atoms_t *atoms,
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const xcb_atom_t *raw,
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uint32_t count
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) {
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for (uint32_t i = 0; i < count; i++)
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if (raw[i] == atoms->_NET_WM_STATE_SKIP_TASKBAR) return true;
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return false;
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}
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static bool minimized_from_hints(const xcb_icccm_wm_hints_t *hints) {
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return hints->initial_state == XCB_ICCCM_WM_STATE_ICONIC;
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}
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static bool maximized_from_states(
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const atoms_t *atoms,
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const xcb_atom_t *state_atoms,
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uint32_t state_count
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) {
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for (uint32_t i = 0; i < state_count; i++) {
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if (state_atoms[i] == atoms->_NET_WM_STATE_MAXIMIZED_VERT ||
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state_atoms[i] == atoms->_NET_WM_STATE_MAXIMIZED_HORZ)
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return true;
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}
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return false;
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}
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static bool fullscreen_from_states(
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const atoms_t *atoms,
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const xcb_atom_t *state_atoms,
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uint32_t state_count
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) {
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for (uint32_t i = 0; i < state_count; i++) {
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if (state_atoms[i] == atoms->_NET_WM_STATE_FULLSCREEN) return true;
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}
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return false;
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}
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static bool urgent_from_states(
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const atoms_t *atoms,
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const xcb_atom_t *state_atoms,
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uint32_t state_count
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) {
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for (uint32_t i = 0; i < state_count; ++i) {
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if (state_atoms[i] == atoms->_NET_WM_STATE_DEMANDS_ATTENTION) return true;
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}
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return false;
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}
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bool populate_window_event(
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backend_t *backend,
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xcb_window_t window,
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window_map_request_event_t *ev
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) {
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ev->window = (window_id_t)window;
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ev->transient_for = window_get_transient_for(backend, window);
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xcb_get_window_attributes_reply_t *wa =
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window_get_attributes(backend, window);
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if (!wa) return false;
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ev->override_redirect = (bool)wa->override_redirect;
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p_delete(&wa);
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xcb_icccm_wm_hints_t wm_hints = {0};
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if (window_get_wm_hints(backend, window, &wm_hints)) {
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ev->urgent = (bool)xcb_icccm_wm_hints_get_urgency(&wm_hints);
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ev->minimized = minimized_from_hints(&wm_hints);
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}
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if (!window_get_fixed_size(backend, window, &ev->fixed_size)) return false;
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if (!window_get_geometry(backend, window, &ev->rect)) return false;
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const atoms_t *atoms = &backend->atoms;
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xcb_atom_t *state_atoms = nullptr;
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uint32_t state_count = 0;
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if (!window_get_atom_array(
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backend,
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window,
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atoms->_NET_WM_STATE,
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&state_atoms,
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&state_count
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)) {
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return false;
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}
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if (state_atoms) {
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ev->maximized = maximized_from_states(atoms, state_atoms, state_count);
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ev->fullscreen = fullscreen_from_states(atoms, state_atoms, state_count);
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ev->skip_taskbar = derive_skip_taskbar(atoms, state_atoms, state_count);
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ev->props.states = derive_window_states(
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atoms,
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state_atoms,
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state_count,
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&ev->props.state_count
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);
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if (!ev->urgent) {
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ev->urgent = urgent_from_states(atoms, state_atoms, state_count);
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}
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}
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p_delete(&state_atoms);
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window_layer_props_t *props = &ev->props;
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if (!window_get_types(backend, window, &props->types, &props->type_count)) {
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p_delete(&props->states);
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return false;
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}
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ev->metadata.role = window_get_role(backend, window);
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ev->metadata.title = window_get_title(backend, window);
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window_get_class(
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backend,
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window,
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&ev->metadata.class_name,
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&ev->metadata.instance_name
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);
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return true;
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}
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static bool handle_map_request(
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backend_t *backend,
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event_t *event,
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const xcb_map_request_event_t *xcb_event
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) {
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event->type = ZDWM_EVENT_WINDOW_MAP_REQUEST;
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return populate_window_event(
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backend,
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xcb_event->window,
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&event->as.window_map_request
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);
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}
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static bool handle_unmap_notify(
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backend_t *backend,
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event_t *event,
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const xcb_unmap_notify_event_t *xcb_event
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) {
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event->type = ZDWM_EVENT_WINDOW_REMOVE;
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event->as.window_remove.window = xcb_event->window;
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if (XCB_EVENT_SENT(xcb_event)) {
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event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_WITHDRAWN;
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} else {
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event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_DESTROY;
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}
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return true;
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}
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static bool handle_destroy_notify(
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backend_t *backend,
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event_t *event,
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const xcb_destroy_notify_event_t *xcb_event
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) {
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event->type = ZDWM_EVENT_WINDOW_REMOVE;
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event->as.window_remove.window = xcb_event->window;
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event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_DESTROY;
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return true;
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}
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static bool handle_configure_request(
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backend_t *backend,
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event_t *event,
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const xcb_configure_request_event_t *xcb_event
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) {
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event->type = ZDWM_EVENT_CONFIGURE_REQUEST;
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auto data = &event->as.configure_request;
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data->window = xcb_event->window;
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data->changed_fields = 0u;
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#define EXTRACT_FIELD(XCB_MASK, FIELD_MASK, DATA_FIELD, EVENT_FIELD) \
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if (xcb_event->value_mask & XCB_CONFIG_WINDOW_##XCB_MASK) { \
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data->DATA_FIELD = xcb_event->EVENT_FIELD; \
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data->changed_fields |= ZDWM_CONFIGURE_FIELD_##FIELD_MASK; \
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}
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EXTRACT_FIELD(X, X, x, x);
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EXTRACT_FIELD(Y, Y, y, y);
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EXTRACT_FIELD(WIDTH, WIDTH, width, width);
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EXTRACT_FIELD(HEIGHT, HEIGHT, height, height);
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EXTRACT_FIELD(BORDER_WIDTH, BORDER_WIDTH, border_width, border_width);
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EXTRACT_FIELD(SIBLING, SIBLING, sibling, sibling);
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EXTRACT_FIELD(STACK_MODE, STACK_MODE, stack_mode, stack_mode);
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#undef EXTRACT_FIELD
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return true;
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}
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static modifier_mask_t get_modifiers(uint16_t mask) {
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typedef struct modifier_map_t {
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modifier_bit_t modifier;
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xcb_mod_mask_t mask;
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} modifier_map_t;
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static constexpr modifier_map_t modifier_map[] = {
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{ZDWM_MOD_SHIFT, XCB_MOD_MASK_SHIFT},
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{ZDWM_MOD_CONTROL, XCB_MOD_MASK_CONTROL},
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{ZDWM_MOD_1, XCB_MOD_MASK_1},
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{ZDWM_MOD_2, XCB_MOD_MASK_2},
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{ZDWM_MOD_3, XCB_MOD_MASK_3},
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{ZDWM_MOD_4, XCB_MOD_MASK_4},
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{ZDWM_MOD_5, XCB_MOD_MASK_5},
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};
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auto mods = ZDWM_MOD_NONE;
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for (size_t i = 0; i < countof(modifier_map); ++i) {
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auto item = &modifier_map[i];
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if (mask & item->mask) mods |= item->modifier;
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}
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return mods;
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}
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static bool handle_key_press(
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backend_t *backend,
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event_t *event,
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const xcb_key_press_event_t *xcb_event
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) {
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auto keycode = xcb_event->detail;
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/* keysym without any modifiers */
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auto keysym = xcb_key_symbols_get_keysym(backend->key_symbols, keycode, 0);
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event->type = ZDWM_EVENT_KEY_PRESS;
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event->as.key_press.keycode = keycode;
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event->as.key_press.keysym = keysym;
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event->as.key_press.modifiers = get_modifiers(xcb_event->state);
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return true;
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}
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static bool handle_enter_notify(
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backend_t *backend,
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event_t *event,
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const xcb_enter_notify_event_t *xcb_event
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) {
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event->type = ZDWM_EVENT_POINTER_ENTER;
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event->as.pointer_enter.window = xcb_event->event;
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return true;
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}
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static bool handle_property_notify(
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backend_t *backend,
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event_t *event,
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const xcb_property_notify_event_t *xcb_event
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) {
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auto window_id = xcb_event->window;
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if (xcb_event->atom == backend->atoms.WM_NAME ||
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xcb_event->atom == backend->atoms._NET_WM_NAME) {
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event->type = ZDWM_EVENT_WINDOW_METADATA_CHANGED;
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auto data = &event->as.window_metadata_change;
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data->window = window_id;
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data->metadata.title = window_get_title(backend, window_id);
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data->changed_fields = ZDWM_WINDOW_METADATA_CHANGE_TITLE;
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return true;
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}
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if (xcb_event->atom == backend->atoms.WM_WINDOW_ROLE) {
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event->type = ZDWM_EVENT_WINDOW_METADATA_CHANGED;
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auto data = &event->as.window_metadata_change;
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data->window = window_id;
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data->metadata.role = window_get_role(backend, window_id);
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data->changed_fields = ZDWM_WINDOW_METADATA_CHANGE_ROLE;
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return true;
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}
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if (xcb_event->atom == XCB_ATOM_WM_CLASS) {
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event->type = ZDWM_EVENT_WINDOW_METADATA_CHANGED;
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auto data = &event->as.window_metadata_change;
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data->window = window_id;
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window_get_class(
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backend,
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window_id,
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&data->metadata.class_name,
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&data->metadata.instance_name
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);
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data->changed_fields =
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ZDWM_WINDOW_METADATA_CHANGE_CLASS | ZDWM_WINDOW_METADATA_CHANGE_INSTANCE;
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return true;
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}
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if (xcb_event->atom == XCB_ATOM_WM_HINTS) {
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xcb_icccm_wm_hints_t hints = {0};
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auto handled = window_get_wm_hints(backend, window_id, &hints);
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if (!handled) return false;
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event->type = ZDWM_EVENT_WINDOW_STATE_REQUEST;
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auto data = &event->as.window_state_request;
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data->window = window_id;
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if (hints.flags & XCB_ICCCM_WM_HINT_X_URGENCY) {
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data->type = ZDWM_WINDOW_STATE_REQUEST_URGENT;
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data->action = xcb_icccm_wm_hints_get_urgency(&hints)
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? ZDWM_WINDOW_STATE_ACTION_ADD
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: ZDWM_WINDOW_STATE_ACTION_REMOVE;
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return true;
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}
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return false;
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}
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if (xcb_event->atom == XCB_ATOM_WM_NORMAL_HINTS) {
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bool fixed_size = false;
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if (!window_get_fixed_size(backend, window_id, &fixed_size)) return false;
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event->type = ZDWM_EVENT_WINDOW_STATE_REQUEST;
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auto data = &event->as.window_state_request;
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data->window = window_id;
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data->type = ZDWM_WINDOW_STATE_REQUEST_FIXED_SIZE;
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data->action = fixed_size ? ZDWM_WINDOW_STATE_ACTION_ADD
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: ZDWM_WINDOW_STATE_ACTION_REMOVE;
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return true;
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}
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return false;
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}
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static bool handle_client_message(
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backend_t *backend,
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event_t *event,
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const xcb_client_message_event_t *xcb_event
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) {
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auto atoms = &backend->atoms;
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if (xcb_event->type == atoms->_NET_ACTIVE_WINDOW) {
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event->type = ZDWM_EVENT_WINDOW_ACTIVATE_REQUEST;
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event->as.window_activate_request.window = xcb_event->window;
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event->as.window_activate_request.source = xcb_event->data.data32[0];
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return true;
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}
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if (xcb_event->type == atoms->WM_CHANGE_STATE) {
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if (xcb_event->data.data32[0] == XCB_ICCCM_WM_STATE_ICONIC) {
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event->type = ZDWM_EVENT_WINDOW_STATE_REQUEST;
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event->as.window_state_request.window = xcb_event->window;
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event->as.window_state_request.type = ZDWM_WINDOW_STATE_REQUEST_MINIMIZED;
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event->as.window_state_request.action = ZDWM_WINDOW_STATE_ACTION_ADD;
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return true;
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}
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return false;
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}
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if (xcb_event->type == atoms->_NET_WM_STATE) {
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event->type = ZDWM_EVENT_WINDOW_STATE_REQUEST;
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auto data = &event->as.window_state_request;
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data->window = xcb_event->window;
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/**
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* _NET_WM_STATE 协议数据格式为
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* data.data32 = {
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* action, // 操作类型（添加/移除/切换）
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* property1, // 第一个状态原子（如_NET_WM_STATE_FULLSCREEN）
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* property2, // 第二个状态原子（可选，通常为0）
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* 0, // 预留字段（固定为0）
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* 0 // 预留字段（固定为0）
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* };
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* action 值可能为
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* _NET_WM_STATE_ADD（1）：添加全屏状态，窗口进入全屏模式
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* _NET_WM_STATE_REMOVE（0）：移除全屏状态，窗口退出全屏模式
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* _NET_WM_STATE_TOGGLE（2）：切换全屏状态（若当前全屏则退出，反之进入）
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*/
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auto action = xcb_event->data.data32[0];
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switch (action) {
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case 0:
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data->action = ZDWM_WINDOW_STATE_ACTION_REMOVE;
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break;
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case 1:
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data->action = ZDWM_WINDOW_STATE_ACTION_ADD;
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break;
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case 2:
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data->action = ZDWM_WINDOW_STATE_ACTION_TOGGLE;
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break;
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}
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auto properties = &xcb_event->data.data32[1];
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uint32_t count = 2;
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if (maximized_from_states(atoms, properties, count)) {
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data->type = ZDWM_WINDOW_STATE_REQUEST_MAXIMIZED;
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return true;
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}
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if (fullscreen_from_states(atoms, properties, count)) {
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data->type = ZDWM_WINDOW_STATE_REQUEST_FULLSCREEN;
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return true;
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}
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if (derive_skip_taskbar(atoms, properties, count)) {
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data->type = ZDWM_WINDOW_STATE_REQUEST_SKIP_TASKBAR;
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return true;
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}
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if (urgent_from_states(atoms, properties, count)) {
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data->type = ZDWM_WINDOW_STATE_REQUEST_URGENT;
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return true;
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}
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return false;
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}
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return false;
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}
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static bool handle_event(
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backend_t *backend,
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xcb_generic_event_t *raw_event,
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event_t *event
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) {
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uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(raw_event);
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bool handled = false;
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auto label = xcb_event_get_label(response_type);
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printf("xcb event type: %s[%u]\n", label, response_type);
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switch (response_type) {
|
||
#define EVENT(type, handler) \
|
||
case type: \
|
||
event_reset(event); \
|
||
handled = handler(backend, event, (void *)raw_event); \
|
||
break
|
||
|
||
EVENT(XCB_MAP_REQUEST, handle_map_request);
|
||
EVENT(XCB_UNMAP_NOTIFY, handle_unmap_notify);
|
||
EVENT(XCB_DESTROY_NOTIFY, handle_destroy_notify);
|
||
EVENT(XCB_CONFIGURE_REQUEST, handle_configure_request);
|
||
EVENT(XCB_KEY_PRESS, handle_key_press);
|
||
EVENT(XCB_ENTER_NOTIFY, handle_enter_notify);
|
||
EVENT(XCB_PROPERTY_NOTIFY, handle_property_notify);
|
||
EVENT(XCB_CLIENT_MESSAGE, handle_client_message);
|
||
|
||
#undef EVENT
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
p_delete(&raw_event);
|
||
if (handled) return true;
|
||
event_reset(event);
|
||
|
||
return false;
|
||
}
|
||
|
||
bool backend_poll_event(backend_t *backend, event_t *event) {
|
||
if (!backend || !backend->conn || !event) return false;
|
||
|
||
auto raw_event = xcb_poll_for_event(backend->conn);
|
||
if (!raw_event) return false;
|
||
|
||
handle_event(backend, raw_event, event);
|
||
return true;
|
||
}
|
||
|
||
bool backend_next_event(backend_t *backend, event_t *event) {
|
||
if (!backend || !backend->conn || !event) return false;
|
||
|
||
for (;;) {
|
||
xcb_generic_event_t *raw_event = xcb_wait_for_event(backend->conn);
|
||
if (!raw_event) return false;
|
||
|
||
if (handle_event(backend, raw_event, event)) return true;
|
||
}
|
||
}
|