WM-195: feat: support pointer-constraints protocol

[deepin-wm]

概述 / Summary

实现 zwp_pointer_constraints_v1（locked/confined）与 zwp_relative_pointer_manager_v1 协议在 treeland/waylib 中的支持。

Implement zwp_pointer_constraints_v1 (locked/confined) and zwp_relative_pointer_manager_v1 protocol support in treeland/waylib.

改动内容 / Changes

waylib（in-tree vendored）:

• 新增 WPointerConstraintsV1 协议包装器（wpointerconstraintsv1.{h,cpp}）
• 新增 WRelativePointerManagerV1 协议包装器（wrelativepointerv1.{h,cpp}）
• 在 WCursorPrivate::on_motion/on_motion_absolute 插入约束强制路径（applyPointerConstraint）：
  • Locked：通过 sendRelativeMotion 发送相对增量（时间戳微秒），隐藏光标并每次运动 warp 回锚点防累积偏移
  • Confined：用 pointer_state.sx/sy 为锚点 + 内联 regionConfineWrapper（pixman 实现）钳制到约束 region
• 内联基于 pixman 的 regionConfine 替代 wlr_region_confine，避免 wlroots 链接依赖

treeland:

• Helper::init 挂载 WPointerConstraintsV1 与 WRelativePointerManagerV1
• 新增 PointerConstraintsManager 管理激活/失活策略：
  • canActivate 检查模式为 Normal、无 drag、无 pointer grab（wlr_seat_pointer_has_grab）、无 move/resize（isInMoveResize）、持 pointer focus
  • onSeatGrabChanged 在 grab_begin 只失活不重激活，grab_end 后才重新评估
  • set_region 变化时重新评估
• 新增 Helper::isInMoveResize(WSeat*) 访问器
• 模式切换（锁屏/多任务视图/窗口切换）时 deactivateAll() 全量失活
• 新增 test_protocol_pointerconstraints 测试用例

关联 / Related

• Multica Issue: WM-195

测试 / Testing

本地全量编译验证通过（V25 / GCC 12.3 / Qt 6.8 / -Wall -Wextra -Werror / --as-needed / ninja -j16）：

• waylib + treeland 编译链接全通过
• test_protocol_pointerconstraints 构建并通过（12/12 tests passed）
• 产出 .deb

已知限制 / Known Limitations

1. surfaceSizeRatio ≠ 1 时 confined 钳制假设 surface-local 与 output-layout delta 同为逻辑坐标
2. 无 grab 的 pointer focus 漂移未接 pointer_state.events.focus_change
3. locked cursor_hint 运行中不实时更新

以上三项作为后续 TODO 跟踪，不构成本轮阻断。

Summary by Sourcery

Add compositor-side support for Wayland pointer constraints and relative pointer protocols, including cursor behavior changes and seat-level activation management.

New Features:

• Expose zwp_pointer_constraints_v1 and zwp_relative_pointer_manager_v1 as waylib server interfaces and attach them in treeland Helper.
• Introduce PointerConstraintsManager to track and control activation of locked and confined pointer constraints based on seat state and compositor mode.

Enhancements:

• Integrate pointer constraint handling into WCursor motion processing, including cursor hiding/warping for locked constraints and region-based confinement for confined constraints using a local pixman-based implementation.
• Provide a Helper::isInMoveResize accessor and deactivate all pointer constraints when switching out of normal mode to keep constraints in sync with compositor UI states.

Tests:

• Add the test_protocol_pointerconstraints test suite to verify creation and discovery of the new protocol interfaces and basic constraint querying behavior.

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[sourcery-ai]

Reviewer's Guide

Adds Wayland zwp_pointer_constraints_v1 (locked/confined) and zwp_relative_pointer_manager_v1 support to waylib/treeland, wiring them into cursor motion handling and introducing a compositor-side manager to control when constraints can be activated, plus basic protocol tests.

Sequence diagram for locked pointer constraint activation and motion handling

sequenceDiagram
    participant WPointerConstraintsV1
    participant PointerConstraintsManager
    participant WSeat
    participant WCursor
    participant WRelativePointerManagerV1

    WPointerConstraintsV1->>WPointerConstraintsV1: create(WServer)
    WPointerConstraintsV1->>WPointerConstraintsV1: newConstraint(wlr_pointer_constraint_v1*)
    WPointerConstraintsV1->>PointerConstraintsManager: onNewConstraint(wlr_pointer_constraint_v1*)
    PointerConstraintsManager->>PointerConstraintsManager: canActivate(wlr_pointer_constraint_v1*)
    PointerConstraintsManager->>WSeat: WSeat::fromHandle(qw_seat*)
    PointerConstraintsManager->>WCursor: activateConstraint(wlr_pointer_constraint_v1*)
    WCursor->>WCursor: setActivePointerConstraint(wlr_pointer_constraint_v1*)

    WCursor->>WCursor: on_motion(wlr_pointer_motion_event*)
    WCursor->>WCursor: WCursorPrivate::applyPointerConstraint(qw_pointer*, timeMsec, dx, dy, dxUnaccel, dyUnaccel, oldPos)
    alt constraint type locked
        WCursor->>WRelativePointerManagerV1: sendRelativeMotion(wlr_seat*, timeUsec, dx, dy, dxUnaccel, dyUnaccel)
        WCursor->>WCursor: setPosition(qw_pointer*, lockedWarpTarget)
    else constraint type confined
        WCursor->>WCursor: regionConfineWrapper(region, sx, sy, confinedSx, confinedSy, x2_out, y2_out)
        WCursor->>WCursor: setPosition(qw_pointer*, newPos)
    end

Loading

File-Level Changes

Change	Details	Files
Integrate pointer-constraint handling into WCursor motion processing, including locked and confined behaviors and region confinement logic.	Hook applyPointerConstraint into on_motion and on_motion_absolute before processCursorMotion Implement applyPointerConstraint to send relative motion events for locked constraints and warp the cursor back to an anchor Implement confined constraint handling using seat pointer_state and a pixman-based regionConfineWrapper Track active pointer constraint, pre-lock cursor visibility, and locked warp target in WCursorPrivate Expose setActivePointerConstraint and activePointerConstraint on WCursor	waylib/src/server/kernel/wcursor.cpp waylib/src/server/kernel/wcursor.h waylib/src/server/kernel/private/wcursor_p.h
Provide in-tree protocol wrappers for zwp_pointer_constraints_v1 and zwp_relative_pointer_manager_v1 and integrate them into the waylib server build.	Add WPointerConstraintsV1 wrapper class over qw_pointer_constraints_v1 with newConstraint signaling and constraintForSurface helper Add WRelativePointerManagerV1 wrapper class over qw_relative_pointer_manager_v1 with sendRelativeMotion helper Register new protocol sources and headers in waylib server CMakeLists.txt	waylib/src/server/protocols/wpointerconstraintsv1.cpp waylib/src/server/protocols/wpointerconstraintsv1.h waylib/src/server/protocols/wrelativepointerv1.cpp waylib/src/server/protocols/wrelativepointerv1.h waylib/src/server/CMakeLists.txt
Introduce a PointerConstraintsManager in treeland to manage activation/deactivation of constraints based on compositor mode, seat grab state, move/resize, and pointer focus.	Create PointerConstraintsManager class that tracks constraints, active set, and associated cursors Implement canActivate with checks on Helper::currentMode, seat drag, wlr_seat_pointer_has_grab, Helper::isInMoveResize, and pointer focus surface Wire up constraint lifecycle: activation on newConstraint/set_region, deactivation on seat grab changes or deactivateAll, cleanup on destroy Hook into qw_seat pointer_grab signals to respond to grab begin/end	src/seat/pointerconstraintsmanager.cpp src/seat/pointerconstraintsmanager.h
Wire pointer-constraint and relative-pointer protocol interfaces into Helper initialization and mode changes, and expose move/resize state for activation logic.	Attach WPointerConstraintsV1 and WRelativePointerManagerV1 from Helper::init and keep pointers on Helper Construct PointerConstraintsManager during initialization Add Helper::isInMoveResize accessor that checks the seat’s surface container moveResizeState Deactivate all constraints when Helper::setCurrentMode switches away from Normal	src/seat/helper.cpp src/seat/helper.h src/CMakeLists.txt
Add unit tests for the new protocol wrappers and integrate them into the test suite.	Create test_protocol_pointerconstraints test verifying interface attachment, names, and global registration for WPointerConstraintsV1 and WRelativePointerManagerV1 Add CMakeLists for the new test and register it with ctest, running offscreen	tests/test_protocol_pointerconstraints/main.cpp tests/test_protocol_pointerconstraints/CMakeLists.txt tests/CMakeLists.txt
Embed a pixman-based regionConfine implementation in wcursor.cpp to avoid linking wlroots util library directly.	Implement recursive regionConfine and regionConfineWrapper functions mirroring wlroots/util/region.c behavior using pixman_region32 APIs Use regionConfineWrapper for confined pointer constraints when updating cursor position	waylib/src/server/kernel/wcursor.cpp

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[deepin-bot]

TAG Bot

New tag: 0.8.18
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #1286