vcl/qt5/QtX11Support.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include <QtX11Support.hxx>
  11
  12 #include <config_vclplug.h>
  13
  14 #include <QtCore/QVersionNumber>
  15
  16 #include <QtInstance.hxx>
  17 #include <QtTools.hxx>
  18
  19 #if CHECK_QT5_USING_X11
  20 #include <QtX11Extras/QX11Info>
  21 #endif
  22
  23 #if QT5_HAVE_XCB_ICCCM
  24 #include <xcb/xcb_icccm.h>
  25 #endif
  26
  27 #include <unx/gensys.h>
  28
  29 xcb_atom_t QtX11Support::m_nWindowGroupAtom = 0;
  30 bool QtX11Support::m_bDidAtomLookups = false;
  31
  32 xcb_atom_t QtX11Support::lookupAtom(xcb_connection_t* pConn, const char* const sAtomName)
  33 {
  34     xcb_atom_t nAtom = 0;
  35     xcb_intern_atom_cookie_t atom_cookie = xcb_intern_atom(pConn, 1, strlen(sAtomName), sAtomName);
  36     xcb_intern_atom_reply_t* atom_reply = xcb_intern_atom_reply(pConn, atom_cookie, nullptr);
  37     if (atom_reply)
  38     {
  39         nAtom = atom_reply->atom;
  40         free(atom_reply);
  41     }
  42     return nAtom;
  43 }
  44
  45 void QtX11Support::fetchAtoms()
  46 {
  47 #if CHECK_QT5_USING_X11
  48     if (m_bDidAtomLookups)
  49         return;
  50     m_bDidAtomLookups = true;
  51
  52     xcb_connection_t* pXcbConn = QX11Info::connection();
  53     m_nWindowGroupAtom = lookupAtom(pXcbConn, m_sWindowGroupName);
  54 #endif
  55 }
  56
  57 void QtX11Support::setApplicationID(const xcb_window_t nWinId, std::u16string_view rWMClass)
  58 {
  59 #if CHECK_QT5_USING_X11
  60     OString aResClass = OUStringToOString(rWMClass, RTL_TEXTENCODING_ASCII_US);
  61     const char* pResClass
  62         = !aResClass.isEmpty() ? aResClass.getStr() : SalGenericSystem::getFrameClassName();
  63     OString aResName = SalGenericSystem::getFrameResName();
  64
  65     // the WM_CLASS data consists of two concatenated cstrings, including the terminating '\0' chars
  66     const uint32_t data_len = aResName.getLength() + 1 + strlen(pResClass) + 1;
  67     char* data = new char[data_len];
  68     memcpy(data, aResName.getStr(), aResName.getLength() + 1);
  69     memcpy(data + aResName.getLength() + 1, pResClass, strlen(pResClass) + 1);
  70
  71     xcb_change_property(QX11Info::connection(), XCB_PROP_MODE_REPLACE, nWinId, XCB_ATOM_WM_CLASS,
  72                         XCB_ATOM_STRING, 8, data_len, data);
  73     delete[] data;
  74 #else
  75     Q_UNUSED(nWinId);
  76     Q_UNUSED(rWMClass);
  77 #endif
  78 }
  79
  80 bool QtX11Support::fixICCCMwindowGroup(const xcb_window_t nWinId)
  81 {
  82 #if CHECK_QT5_USING_X11 && QT5_HAVE_XCB_ICCCM
  83     // older Qt5 just sets WM_CLIENT_LEADER, but not the XCB_ICCCM_WM_HINT_WINDOW_GROUP
  84     // see Qt commit 0de4b326d8 ("xcb: fix issue with dialogs hidden by other windows")
  85     // or QTBUG-46626. So LO has to set this itself to help some WMs.
  86     if (QVersionNumber::fromString(qVersion()) >= QVersionNumber(5, 12))
  87         return false;
  88
  89     xcb_connection_t* pXcbConn = QX11Info::connection();
  90     xcb_icccm_wm_hints_t hints;
  91
  92     xcb_get_property_cookie_t prop_cookie = xcb_icccm_get_wm_hints_unchecked(pXcbConn, nWinId);
  93     if (!xcb_icccm_get_wm_hints_reply(pXcbConn, prop_cookie, &hints, nullptr))
  94         return false;
  95
  96     if (hints.flags & XCB_ICCCM_WM_HINT_WINDOW_GROUP)
  97         return false;
  98
  99     fetchAtoms();
 100     if (!m_nWindowGroupAtom)
 101         return false;
 102
 103     prop_cookie = xcb_get_property(pXcbConn, 0, nWinId, m_nWindowGroupAtom, XCB_ATOM_WINDOW, 0, 1);
 104     xcb_get_property_reply_t* prop_reply = xcb_get_property_reply(pXcbConn, prop_cookie, nullptr);
 105     if (!prop_reply)
 106         return true;
 107
 108     if (xcb_get_property_value_length(prop_reply) != 4)
 109     {
 110         free(prop_reply);
 111         return true;
 112     }
 113
 114     xcb_window_t leader = *static_cast<xcb_window_t*>(xcb_get_property_value(prop_reply));
 115     free(prop_reply);
 116
 117     hints.flags |= XCB_ICCCM_WM_HINT_WINDOW_GROUP;
 118     hints.window_group = leader;
 119     xcb_icccm_set_wm_hints(pXcbConn, nWinId, &hints);
 120     return true;
 121 #else
 122     Q_UNUSED(nWinId);
 123     return false;
 124 #endif
 125 }
 126
 127 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */