mirror of
https://gitlab.freedesktop.org/xorg/xserver.git
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b9ed4bd4c0
Add tests for commit b243ef9bc2 ("Xi: Swap property data in
SProcXChangeDeviceProperty/SProcXIChangeProperty").
Both tests set a format=32 property from a byte-swapped client and
read it back, verifying the values round-trip correctly. Without the
property data swap, the stored values have the wrong byte order.
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2187>
373 lines
9.5 KiB
Python
373 lines
9.5 KiB
Python
# SPDX-License-Identifier: MIT
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#
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# XI/XI2 (XInput) extension protocol request builders
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import struct
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from dataclasses import dataclass
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# XI (v1) minor opcodes
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XChangeDeviceControl = 35
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XChangeDeviceProperty = 37
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XGetDeviceProperty = 39
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# XI2 minor opcodes
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XIQueryVersion = 47
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XIPassiveGrabDevice = 54
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XIPassiveUngrabDevice = 55
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XIChangeProperty = 57
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XIGetProperty = 59
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XI2_MAJOR = 2
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XI2_MINOR = 4
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# Grab types
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XIGrabtypeButton = 0
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XIGrabtypeKeycode = 1
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XIGrabtypeEnter = 2
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XIGrabtypeFocusIn = 3
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# Grab modes
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XIGrabModeSync = 0
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XIGrabModeAsync = 1
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# Special values
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XIAllDevices = 0
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XIAllMasterDevices = 1
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XIAnyModifier = 1 << 31
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# Grab status codes (returned as X11 error codes when used as
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# ProcXIPassiveGrabDevice return values)
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XIAlreadyGrabbed = 1
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# Property modes
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PropModeReplace = 0
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PropModePrepend = 1
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PropModeAppend = 2
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# Virtual core device IDs (always present)
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VirtualCorePointer = 2
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VirtualCoreKeyboard = 3
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# Device control types (for XChangeDeviceControl)
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DEVICE_RESOLUTION = 1
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DEVICE_ABS_CALIB = 2
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DEVICE_ABS_AREA = 3
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DEVICE_CORE = 4
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DEVICE_ENABLE = 5
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@dataclass
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class XIQueryVersionRequest:
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"""XIQueryVersion request."""
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opcode: int
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major: int = XI2_MAJOR
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minor: int = XI2_MINOR
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def to_bytes(self, byte_order: str = "<") -> bytes:
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return struct.pack(
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f"{byte_order}BBHHH",
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self.opcode,
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XIQueryVersion,
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2, # 8 bytes = 2 words
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self.major,
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self.minor,
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)
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@dataclass
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class XIPassiveGrabDeviceRequest:
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"""XIPassiveGrabDevice request."""
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opcode: int
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grab_window: int
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detail: int
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deviceid: int = XIAllMasterDevices
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grab_type: int = XIGrabtypeButton
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grab_mode: int = XIGrabModeAsync
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paired_device_mode: int = XIGrabModeAsync
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owner_events: bool = False
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mask: bytes = b"\x00" * 4
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modifiers: list[int] | None = None
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def to_bytes(self, byte_order: str = "<") -> bytes:
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mods = self.modifiers if self.modifiers is not None else [XIAnyModifier]
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num_modifiers = len(mods)
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mask_padded = self.mask + b"\x00" * ((4 - len(self.mask) % 4) % 4)
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mask_len = len(mask_padded) // 4
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# Header: 32 bytes, mask: mask_len*4, modifiers: num_modifiers*4
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total = 32 + len(mask_padded) + num_modifiers * 4
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length = total // 4
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header = struct.pack(
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f"{byte_order}BBH IIII HHH BBBB H",
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self.opcode,
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XIPassiveGrabDevice,
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length,
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0, # time = CurrentTime
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self.grab_window,
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0, # cursor = None
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self.detail,
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self.deviceid,
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num_modifiers,
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mask_len,
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self.grab_type,
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self.grab_mode,
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self.paired_device_mode,
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1 if self.owner_events else 0,
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0, # pad
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)
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mod_data = b""
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for mod in mods:
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mod_data += struct.pack(f"{byte_order}I", mod)
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return header + mask_padded + mod_data
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@dataclass
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class XIPassiveUngrabDeviceRequest:
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"""XIPassiveUngrabDevice request."""
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opcode: int
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grab_window: int
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detail: int
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deviceid: int = XIAllMasterDevices
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grab_type: int = XIGrabtypeButton
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modifiers: list[int] | None = None
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def to_bytes(self, byte_order: str = "<") -> bytes:
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mods = self.modifiers if self.modifiers is not None else [XIAnyModifier]
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num_modifiers = len(mods)
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# Header is 20 bytes, followed by num_modifiers * 4 bytes
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length = (20 + num_modifiers * 4) // 4
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header = struct.pack(
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f"{byte_order}BBH II HH Bx H",
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self.opcode,
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XIPassiveUngrabDevice,
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length,
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self.grab_window,
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self.detail,
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self.deviceid,
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num_modifiers,
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self.grab_type,
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# pad0, pad1
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0,
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)
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mod_data = b""
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for mod in mods:
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mod_data += struct.pack(f"{byte_order}I", mod)
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return header + mod_data
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@dataclass
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class XIChangePropertyRequest:
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"""XIChangeProperty request."""
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opcode: int
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deviceid: int
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property_atom: int
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type_atom: int
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format: int = 32
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mode: int = PropModeReplace
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data: bytes = b""
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num_items: int | None = None
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def to_bytes(self, byte_order: str = "<") -> bytes:
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num_items = (
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self.num_items
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if self.num_items is not None
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else (len(self.data) // (self.format // 8) if self.data else 0)
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)
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total_bytes = 20 + len(self.data)
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pad_len = (4 - total_bytes % 4) % 4
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total_bytes += pad_len
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length = total_bytes // 4
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header = struct.pack(
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f"{byte_order}BBH HBB II I",
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self.opcode,
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XIChangeProperty,
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length,
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self.deviceid,
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self.mode,
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self.format,
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self.property_atom,
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self.type_atom,
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num_items,
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)
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return header + self.data + b"\x00" * pad_len
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@dataclass
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class XIGetPropertyRequest:
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"""XIGetProperty request."""
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opcode: int
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deviceid: int
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property_atom: int
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type_atom: int = 0 # AnyPropertyType
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offset: int = 0
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length: int = 0xFFFF
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delete: bool = False
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def to_bytes(self, byte_order: str = "<") -> bytes:
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return struct.pack(
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f"{byte_order}BBH HBx II II",
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self.opcode,
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XIGetProperty,
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6, # 24 bytes = 6 words
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self.deviceid,
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1 if self.delete else 0,
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self.property_atom,
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self.type_atom,
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self.offset,
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self.length,
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)
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@dataclass
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class XChangeDevicePropertyRequest:
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"""XChangeDeviceProperty request (XI v1, minor opcode 37).
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Wire format (xChangeDevicePropertyReq):
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opcode(1) + ReqType(1) + length(2) + property(4) + type(4) +
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deviceid(1) + format(1) + mode(1) + pad(1) + nUnits(4)
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Total header: 20 bytes, followed by property data.
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"""
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opcode: int
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deviceid: int
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property_atom: int
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type_atom: int
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format: int = 32
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mode: int = PropModeReplace
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data: bytes = b""
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num_items: int | None = None
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def to_bytes(self, byte_order: str = "<") -> bytes:
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num_items = (
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self.num_items
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if self.num_items is not None
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else (len(self.data) // (self.format // 8) if self.data else 0)
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)
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total_bytes = 20 + len(self.data)
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pad_len = (4 - total_bytes % 4) % 4
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total_bytes += pad_len
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length = total_bytes // 4
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header = struct.pack(
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f"{byte_order}BBH II BBBx I",
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self.opcode,
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XChangeDeviceProperty,
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length,
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self.property_atom,
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self.type_atom,
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self.deviceid,
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self.format,
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self.mode,
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num_items,
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)
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return header + self.data + b"\x00" * pad_len
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@dataclass
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class XGetDevicePropertyRequest:
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"""XGetDeviceProperty request (XI v1, minor opcode 39).
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Wire format (xGetDevicePropertyReq):
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opcode(1) + ReqType(1) + length(2) + property(4) + type(4) +
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longOffset(4) + longLength(4) + deviceid(1) + delete(1) + pad(2)
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Total: 24 bytes = 6 words.
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"""
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opcode: int
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deviceid: int
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property_atom: int
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type_atom: int = 0 # AnyPropertyType
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offset: int = 0
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req_length: int = 0xFFFF
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delete: bool = False
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def to_bytes(self, byte_order: str = "<") -> bytes:
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return struct.pack(
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f"{byte_order}BBH II II BBxx",
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self.opcode,
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XGetDeviceProperty,
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6, # 24 bytes = 6 words
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self.property_atom,
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self.type_atom,
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self.offset,
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self.req_length,
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self.deviceid,
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1 if self.delete else 0,
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)
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@dataclass
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class XChangeDeviceControlRequest:
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"""XChangeDeviceControl request (XI v1, minor opcode 35).
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The request header is 8 bytes (xChangeDeviceControlReq), followed by
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a device control structure that depends on the control type.
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For DEVICE_RESOLUTION, the control is xDeviceResolutionCtl (12 bytes)
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followed by num_valuators CARD32 values.
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"""
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opcode: int
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control: int
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deviceid: int
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control_data: bytes = b""
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def to_bytes(self, byte_order: str = "<") -> bytes:
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total = 8 + len(self.control_data)
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pad_len = (4 - total % 4) % 4
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length = (total + pad_len) // 4
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header = struct.pack(
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f"{byte_order}BBH HBx",
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self.opcode,
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XChangeDeviceControl,
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length,
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self.control,
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self.deviceid,
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)
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return header + self.control_data + b"\x00" * pad_len
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@dataclass
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class DeviceResolutionCtl:
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"""xDeviceResolutionCtl structure (8 bytes + valuator values).
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control(2) + length(2) + first_valuator(1) + num_valuators(1) + pad(2)
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followed by num_valuators CARD32 resolution values.
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"""
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first_valuator: int = 0
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num_valuators: int = 0
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resolutions: list[int] | None = None
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def to_bytes(self, byte_order: str = "<") -> bytes:
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vals = self.resolutions if self.resolutions is not None else []
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val_data = b""
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for v in vals:
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val_data += struct.pack(f"{byte_order}I", v)
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ctl_length = (8 + len(val_data)) // 4
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header = struct.pack(
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f"{byte_order}HH BB xx",
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DEVICE_RESOLUTION,
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ctl_length,
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self.first_valuator,
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self.num_valuators,
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)
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return header + val_data
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