| 1 | // Copyright (C) 2023 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #include "qx11capturablewindows_p.h" |
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| 5 | #include "private/qcapturablewindow_p.h" |
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| 6 | #include <qdebug.h> |
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| 7 | |
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| 8 | #include <X11/Xlib.h> |
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| 9 | |
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| 10 | QT_BEGIN_NAMESPACE |
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| 11 | |
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| 12 | QX11CapturableWindows::~QX11CapturableWindows() |
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| 13 | { |
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| 14 | if (m_display) |
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| 15 | XCloseDisplay(m_display); |
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| 16 | } |
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| 17 | |
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| 18 | QList<QCapturableWindow> QX11CapturableWindows::windows() const |
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| 19 | { |
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| 20 | auto display = this->display(); |
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| 21 | |
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| 22 | if (!display) |
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| 23 | return {}; |
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| 24 | |
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| 25 | Atom atom = XInternAtom(display, "_NET_CLIENT_LIST" , true); |
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| 26 | Atom actualType = 0; |
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| 27 | int format = 0; |
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| 28 | unsigned long windowsCount = 0; |
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| 29 | unsigned long bytesAfter = 0; |
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| 30 | unsigned char *data = nullptr; |
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| 31 | const int status = XGetWindowProperty(display, XDefaultRootWindow(display), atom, 0L, (~0L), |
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| 32 | false, AnyPropertyType, &actualType, &format, |
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| 33 | &windowsCount, &bytesAfter, &data); |
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| 34 | |
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| 35 | if (status < Success || !data) |
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| 36 | return {}; |
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| 37 | |
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| 38 | QList<QCapturableWindow> result; |
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| 39 | |
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| 40 | auto freeDataGuard = qScopeGuard(f: [data]() { XFree(data); }); |
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| 41 | auto windows = reinterpret_cast<XID *>(data); |
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| 42 | for (unsigned long i = 0; i < windowsCount; i++) { |
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| 43 | auto windowData = std::make_unique<QCapturableWindowPrivate>(); |
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| 44 | windowData->id = static_cast<QCapturableWindowPrivate::Id>(windows[i]); |
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| 45 | |
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| 46 | char *windowTitle = nullptr; |
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| 47 | if (XFetchName(display, windows[i], &windowTitle) && windowTitle) { |
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| 48 | windowData->description = QString::fromUtf8(utf8: windowTitle); |
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| 49 | XFree(windowTitle); |
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| 50 | } |
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| 51 | |
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| 52 | if (isWindowValid(window: *windowData)) |
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| 53 | result.push_back(t: windowData.release()->create()); |
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| 54 | } |
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| 55 | |
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| 56 | return result; |
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| 57 | } |
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| 58 | |
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| 59 | bool QX11CapturableWindows::isWindowValid(const QCapturableWindowPrivate &window) const |
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| 60 | { |
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| 61 | auto display = this->display(); |
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| 62 | XWindowAttributes windowAttributes = {}; |
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| 63 | return display |
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| 64 | && XGetWindowAttributes(display, static_cast<Window>(window.id), &windowAttributes) != 0 |
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| 65 | && windowAttributes.depth > 0; |
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| 66 | } |
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| 67 | |
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| 68 | Display *QX11CapturableWindows::display() const |
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| 69 | { |
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| 70 | std::call_once(once&: m_displayOnceFlag, f: [this]() { m_display = XOpenDisplay(nullptr); }); |
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| 71 | return m_display; |
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| 72 | } |
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| 73 | |
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| 74 | QT_END_NAMESPACE |
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| 75 | |
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