37 lines
1.3 KiB
Bash
Executable File
37 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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# blob:summary=Decode a QR code from a screenshot region
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# blob:group=capture
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# blob:examples=blob capture qr
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# Keep hyprpicker alive until after grim captures so the screenshot sees the
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# frozen overlay rather than live content shifting during teardown.
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cleanup_freeze() {
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[[ -n $PID ]] && kill $PID 2>/dev/null
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}
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trap cleanup_freeze EXIT
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hyprpicker -r -z >/dev/null 2>&1 &
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PID=$!
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sleep .1
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SELECTION=$(slurp 2>/dev/null)
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[[ -z $SELECTION ]] && exit 0
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# Decode QR codes only. Leaving the other symbologies enabled lets dense screen
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# content false-positive as an EAN or Code 39 barcode and take over the clipboard.
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RESULT=$(grim -g "$SELECTION" - | zbarimg -q --raw -Sdisable -Sqrcode.enable - 2>/dev/null)
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if [[ -z $RESULT ]]; then
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blob-notify-send -g -u critical "No QR code found" "Select a region containing a QR code"
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exit 1
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fi
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# QR codes routinely carry secrets, like the otpauth:// URIs behind 2FA setup
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# codes, so the decoded value goes to the clipboard and nowhere else. Printing it
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# or putting it in the notification would leak it to the session journal and to
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# the notification history, and an unmarked copy would be retained by clipboard
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# history. Pasting still works; only the recorded copy is given up.
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printf '%s' "$RESULT" | wl-copy --sensitive
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blob-notify-send -g "QR code copied to clipboard"
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