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55 lines
2.0 KiB
Bash
Executable File
55 lines
2.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# capture-app-window.sh — Capture a screenshot of a specific app window
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#
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# Uses CGWindowList via Swift to find the window by process name, then
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# screencapture -l <windowID> to capture only that window.
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# Falls back to full-screen capture if the window is not found.
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#
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# Usage:
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# ./capture-app-window.sh <process_name> <output_path>
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#
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# Arguments:
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# process_name — The process/owner name as shown in Activity Monitor
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# (e.g., "Discord", "Slack", "Telegram", "WeChat", "QQ", "Lark")
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# output_path — Path to save the screenshot (e.g., /tmp/screenshot.png)
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#
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# Examples:
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# ./capture-app-window.sh "Discord" /tmp/discord.png
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# ./capture-app-window.sh "Slack" /tmp/slack.png
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# ./capture-app-window.sh "微信" /tmp/wechat.png
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#
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set -euo pipefail
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PROCESS="${1:?Usage: capture-app-window.sh <process_name> <output_path>}"
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OUTPUT="${2:?Usage: capture-app-window.sh <process_name> <output_path>}"
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# Find the CGWindowID for the target process using Swift + CGWindowList
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# Pass process name via environment variable (swift -e doesn't support -- args)
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WINDOW_ID=$(TARGET_PROCESS="$PROCESS" swift -e '
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import Cocoa
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import Foundation
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let target = ProcessInfo.processInfo.environment["TARGET_PROCESS"] ?? ""
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let windowList = CGWindowListCopyWindowInfo([.optionAll], kCGNullWindowID) as! [[String: Any]]
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for w in windowList {
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let owner = w["kCGWindowOwnerName"] as? String ?? ""
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let layer = w["kCGWindowLayer"] as? Int ?? -1
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let bounds = w["kCGWindowBounds"] as? [String: Any] ?? [:]
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let ww = bounds["Width"] as? Double ?? 0
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let wh = bounds["Height"] as? Double ?? 0
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let wid = w["kCGWindowNumber"] as? Int ?? 0
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// Match process name, normal window layer (0), and reasonable size
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if owner == target && layer == 0 && ww > 200 && wh > 200 {
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print(wid)
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break
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}
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}
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' 2>/dev/null || true)
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if [ -n "$WINDOW_ID" ]; then
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screencapture -l "$WINDOW_ID" -x "$OUTPUT"
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else
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echo "[capture] Warning: Could not find window for '$PROCESS', falling back to full screen"
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screencapture -x "$OUTPUT"
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fi
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