src/statusbar/spaceinfoobserver.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2014 Frank Reininghaus <frank78ac@googlemail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "spaceinfoobserver.h"
   8
   9 #include "mountpointobserver.h"
  10
  11 SpaceInfoObserver::SpaceInfoObserver(const QUrl &url, QObject *parent)
  12     : QObject(parent)
  13     , m_mountPointObserver(nullptr)
  14     , m_hasData(false)
  15     , m_dataSize(0)
  16     , m_dataAvailable(0)
  17 {
  18     if (!url.isEmpty()) {
  19         setUrl(url);
  20     }
  21 }
  22
  23 SpaceInfoObserver::~SpaceInfoObserver()
  24 {
  25     if (m_mountPointObserver) {
  26         m_mountPointObserver->deref();
  27         m_mountPointObserver = nullptr;
  28     }
  29 }
  30
  31 quint64 SpaceInfoObserver::size() const
  32 {
  33     return m_dataSize;
  34 }
  35
  36 quint64 SpaceInfoObserver::available() const
  37 {
  38     return m_dataAvailable;
  39 }
  40
  41 void SpaceInfoObserver::setUrl(const QUrl &url)
  42 {
  43     MountPointObserver *newObserver = MountPointObserver::observerForUrl(url);
  44     if (newObserver != m_mountPointObserver) {
  45         if (m_mountPointObserver) {
  46             disconnect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  47             m_mountPointObserver->deref();
  48             m_mountPointObserver = nullptr;
  49         }
  50
  51         m_mountPointObserver = newObserver;
  52         m_mountPointObserver->ref();
  53         connect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  54
  55         // If newObserver is cached it won't call update until the next timer update,
  56         // so update the observer now.
  57         m_mountPointObserver->update();
  58     }
  59 }
  60
  61 void SpaceInfoObserver::update()
  62 {
  63     if (m_mountPointObserver) {
  64         m_mountPointObserver->update();
  65     }
  66 }
  67
  68 void SpaceInfoObserver::spaceInfoChanged(quint64 size, quint64 available)
  69 {
  70     // Make sure that the size has actually changed
  71     if (m_dataSize != size || m_dataAvailable != available || !m_hasData) {
  72         m_hasData = true;
  73         m_dataSize = size;
  74         m_dataAvailable = available;
  75
  76         Q_EMIT valuesChanged();
  77     }
  78 }
  79
  80 #include "moc_spaceinfoobserver.cpp"