Computer Use

MIT License

Copyright (c) 2025 oil-oil

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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SOFTWARE.

#!/bin/bash
# Computer-use init — run once at the start of each task.
# Sets up three things: scale factor, scroll tool, snap helper.
# Safe to re-run; only recompiles scroll tool if source changed.

SKILL_DIR="$(cd "$(dirname "$0")/.." && pwd)"

# ── 1. Retina scale factor ─────────────────────────────────────────────────
# screencapture gives pixel dimensions; cliclick uses logical points.
# On Retina screens these differ (typically 2×). We need the ratio so
# coordinates read from screenshots can be used directly for cliclick.
screencapture -x /tmp/_cu_check.png
PX=$(sips -g pixelWidth /tmp/_cu_check.png | awk '/pixelWidth/{print $2}')
LW=$(osascript -e 'tell application "Finder" to get item 3 of (get bounds of window of desktop)' 2>/dev/null || echo 1512)
SCALE=$(python3 -c "print(round($PX/$LW))")
echo "$SCALE" > /tmp/_cu_scale
echo "scale=$SCALE  (screenshot=${PX}px  logical=${LW}px)"

# ── 2. Scroll tool ─────────────────────────────────────────────────────────
# cliclick has no scroll wheel command; keyboard shortcuts are stolen by
# chat-app input boxes. We compile a tiny Swift binary using CGEvent instead.
cp "$SKILL_DIR/scripts/scroll.swift" /tmp/_cu_scroll.swift
if [ ! -f /tmp/_cu_scroll ] || [ /tmp/_cu_scroll.swift -nt /tmp/_cu_scroll ]; then
    swiftc /tmp/_cu_scroll.swift -o /tmp/_cu_scroll && echo "scroll tool compiled"
else
    echo "scroll tool up-to-date"
fi

# ── 3. Snap helper ─────────────────────────────────────────────────────────
# Wraps screencapture + resize-to-logical-resolution + optional crop.
# After cu_snap, coordinates in the image == cliclick logical coordinates.
# Keeping screenshots at logical resolution (rather than retina pixels)
# reduces vision-model token cost by ~30-50%.
#
# Usage:
#   /tmp/_cu_snap.sh <out.png>
#   /tmp/_cu_snap.sh <out.png> <W> <H> <x_offset> <y_offset>   # crop after resize
cat << 'SH' > /tmp/_cu_snap.sh
#!/bin/bash
OUT=${1:-/tmp/cu.png}
S=$(cat /tmp/_cu_scale 2>/dev/null || echo 2)
screencapture -x "$OUT"
PW=$(sips -g pixelWidth  "$OUT" | awk '/pixelWidth/{print $2}')
PH=$(sips -g pixelHeight "$OUT" | awk '/pixelHeight/{print $2}')
LW=$((PW / S)); LH=$((PH / S))
sips -z "$LH" "$LW" "$OUT" --out "$OUT" > /dev/null
if [ -n "$2" ]; then
    sips "$OUT" --cropToHeightWidth "$3" "$2" --cropOffset "${5:-0}" "${4:-0}" \
        --out "$OUT" > /dev/null
fi
echo "snap: ${LW}x${LH}$([ -n "$2" ] && echo " → crop $2×$3") → $OUT"
SH
chmod +x /tmp/_cu_snap.sh
echo "snap helper ready"

# ── 4. Visible processes ───────────────────────────────────────────────────
# Always print so you know the real process name before calling osascript.
# (e.g. Feishu ≠ Lark, WeChat ≠ 微信)
echo "--- visible processes ---"
osascript -e 'tell application "System Events" to get name of every process whose visible is true'

// CGEvent scroll tool — compiled once by init.sh, used as /tmp/_cu_scroll
// Usage: _cu_scroll <x> <y> <amount>   (amount < 0 = down, > 0 = up)
import Foundation
import CoreGraphics

let a = CommandLine.arguments
let x = Double(a.count > 1 ? a[1] : "760") ?? 760
let y = Double(a.count > 2 ? a[2] : "400") ?? 400
let n = Int32(a.count  > 3 ? a[3] : "-5")  ?? -5

// Move cursor to target position first so the scroll lands in the right window
CGEvent(mouseEventSource: nil, mouseType: .mouseMoved,
        mouseCursorPosition: CGPoint(x: x, y: y), mouseButton: .left)?
    .post(tap: .cghidEventTap)

for _ in 0..<10 {
    let e = CGEvent(scrollWheelEvent2Source: nil, units: .line,
                    wheelCount: 1, wheel1: n, wheel2: 0, wheel3: 0)
    e?.location = CGPoint(x: x, y: y)
    e?.post(tap: .cghidEventTap)
    usleep(16000) // ~60fps
}