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input: extract mouse encoding to a pure, testable file

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Move mouse event encoding logic from Surface.zig into a new
input/mouse_encode.zig file.

The new file encapsulates event filtering (shouldReport),
button code computation, viewport bounds checking, motion
deduplication, and all five wire formats (X10, UTF-8, SGR,
urxvt, SGR-pixels). This makes the encoding independently
testable and adds unit tests covering each format and edge
case.

Additionally, Surface `mouseReport` can no longer fail, since the only
failure mode is no buffer space which should be impossible. Updated
the signature to remove the error set.
This commit is contained in:
Mitchell Hashimoto
2026-03-15 07:43:34 -07:00
parent a7514d389b
commit ac5e57ce67
6 changed files with 839 additions and 217 deletions
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src/input.zig
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@@ -12,6 +12,7 @@ pub const function_keys = @import("input/function_keys.zig");
pub const keycodes = @import("input/keycodes.zig");
pub const key_encode = @import("input/key_encode.zig");
pub const kitty = @import("input/kitty.zig");
pub const mouse_encode = @import("input/mouse_encode.zig");
pub const paste = @import("input/paste.zig");
pub const ctrlOrSuper = key.ctrlOrSuper;
@@ -25,6 +26,7 @@ pub const KeyEvent = key.KeyEvent;
pub const KeyRemapSet = key_mods.RemapSet;
pub const InspectorMode = Binding.Action.InspectorMode;
pub const Mods = key_mods.Mods;
pub const MouseAction = mouse.Action;
pub const MouseButton = mouse.Button;
pub const MouseButtonState = mouse.ButtonState;
pub const MousePressureStage = mouse.PressureStage;