fix finding default address on windows

merge travis CI patches (and others)

.travis.yml

@@ -1,10 +1,34 @@
 language: cpp
-before_install:
+
-- sudo apt-get update -qq
+matrix:
-- sudo apt-get install -qq libxtst-dev
+  include:
-- sudo apt-get install -qq qtdeclarative5-dev
+    - os: linux
-- sudo apt-get install -qq libavahi-compat-libdnssd-dev
+      sudo: false
-script: sh -x ./clean_build.sh
+      dist: trusty
-# skip install phase since we have a customized install package
+      addons:
-# creation tool for each supported platform
+        apt:
+          packages:
+            - libxtst-dev
+            - qtdeclarative5-dev
+            - libavahi-compat-libdnssd-dev
+      script: sh -x ./clean_build.sh
+
+    - os: osx
+      osx_image: xcode9
+      script:
+        - export COLUMNS=80
+        - curl -LO https://raw.githubusercontent.com/GiovanniBussi/macports-ci/master/macports-ci
+        - chmod +x ./macports-ci
+        - ./macports-ci install
+        - PATH="$PATH:/opt/local/bin"
+        - sudo port -N install qt5-qtbase openssl
+        - sh -x ./clean_build.sh
+
+    - os: osx
+      osx_image: xcode9
+      script:
+        - brew update
+        - brew install qt openssl
+        - sh -x ./clean_build.sh
+
 install: true

CMakeLists.txt

@@ -63,6 +63,7 @@ if (UNIX)
     include (CheckIncludeFileCXX)
     include (CheckSymbolExists)
     include (CheckCSourceCompiles)
+    include (FindPkgConfig)
 
     check_include_file_cxx (istream HAVE_ISTREAM)
     check_include_file_cxx (ostream HAVE_OSTREAM)
@@ -163,6 +164,12 @@ if (UNIX)
             link_directories("/usr/local/lib")
         endif()
 
+        if (${PKG_CONFIG_FOUND})
+            pkg_check_modules (AVAHI_COMPAT REQUIRED avahi-compat-libdns_sd)
+            include_directories (BEFORE SYSTEM ${AVAHI_COMPAT_INCLUDE_DIRS})
+            set (CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES};${AVAHI_COMPAT_INCLUDE_DIRS}")
+        endif ()
+
         set (XKBlib "X11/Xlib.h;X11/XKBlib.h")
         set (CMAKE_EXTRA_INCLUDE_FILES "${XKBlib};X11/extensions/Xrandr.h")
         check_type_size ("XRRNotifyEvent" X11_EXTENSIONS_XRANDR_H)
@@ -187,7 +194,7 @@ if (UNIX)
             message (FATAL_ERROR "Missing header: " ${XKBlib})
         endif()
 
-        if (NOT HAVE_DNSSD)
+        if (BARRIER_BUILD_GUI AND NOT HAVE_DNSSD)
             message (FATAL_ERROR "Missing header: dns_sd.h")
         endif()
 
@@ -302,13 +309,28 @@ if (${CMAKE_SYSTEM_NAME} MATCHES "Windows")
         ${OPENSSL_ROOT}/lib/ssleay32.lib
     )
 elseif (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+
+    if (IS_DIRECTORY /opt/local)
+        # macports
+        set (OPENSSL_ROOT /opt/local)
+
+        set (OPENSSL_LIBS
+            ${OPENSSL_ROOT}/lib/libssl.a
+            ${OPENSSL_ROOT}/lib/libcrypto.a
+            z
+        )
+    elseif (IS_DIRECTORY /usr/local/opt/openssl)
+        # brew
         set (OPENSSL_ROOT /usr/local/opt/openssl)
 
         include_directories (BEFORE SYSTEM ${OPENSSL_ROOT}/include)
+
         set (OPENSSL_LIBS
             ${OPENSSL_ROOT}/lib/libssl.a
             ${OPENSSL_ROOT}/lib/libcrypto.a
         )
+    endif()
+
 elseif (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
     set (OPENSSL_LIBS ssl crypto)
 else()

README.md

@@ -10,7 +10,7 @@ Barrier is KVM software forked from Symless's synergy 1.9 codebase. Synergy was
 
 ### What's different?
 
-Whereas synergy has moved beyond its goals from the 1.x era, barrier aims to maintain that simplicity. Barrier will let you use your keyboard and mouse from machine A to control machine B (or more). That's it.
+Whereas synergy has moved beyond its goals from the 1.x era, barrier aims to maintain that simplicity. Barrier will let you use your keyboard and mouse from machine A to control machine B (or more). It's that simple.
 
 ### Project goals
 

clean_build.bat

@@ -3,8 +3,8 @@
 REM defaults - override them by creating a build_env.bat file
 set B_BUILD_TYPE=Debug
 set B_QT_ROOT=C:\Qt
-set B_QT_VER=5.6.3
+set B_QT_VER=5.11.1
-set B_QT_MSVC=msvc2015_64
+set B_QT_MSVC=msvc2017_64
 set B_BONJOUR=C:\Program Files\Bonjour SDK
 
 set savedir=%cd%

clean_build.sh

@@ -14,7 +14,7 @@ if [ "$(uname)" = "Darwin" ]; then
     # OSX needs a lot of extra help, poor thing
     # run the osx_environment.sh script to fix paths
     . ./osx_environment.sh
-    B_CMAKE_FLAGS="-DCMAKE_OSX_SYSROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk -DCMAKE_OSX_DEPLOYMENT_TARGET=10.9 $B_CMAKE_FLAGS"
+    B_CMAKE_FLAGS="-DCMAKE_OSX_SYSROOT=$(xcode-select --print-path)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -DCMAKE_OSX_DEPLOYMENT_TARGET=10.9 $B_CMAKE_FLAGS"
 fi
 # allow local customizations to build environment
 [ -r ./build_env.sh ] && . ./build_env.sh

cmake/Version.cmake

@@ -1,7 +1,7 @@
 cmake_minimum_required (VERSION 3.4)
 
 set (BARRIER_VERSION_MAJOR 2)
-set (BARRIER_VERSION_MINOR 1)
+set (BARRIER_VERSION_MINOR 2)
 set (BARRIER_VERSION_PATCH 0)
 
 #

debian/changelog

@@ -0,0 +1,5 @@
+barrier (2.1-1) unstable; urgency=low
+
+  * Initial release (Closes: #123456)
+
+ -- Debauchee Open Source Group <debauchee.oss@gmail.com>  Sat, 01 Apr 2018 00:00:00 +0000

osx_environment.sh

@@ -1,16 +1,37 @@
-#!/bin/sh
+#!/bin/bash
 
 if [ ! $BARRIER_BUILD_ENV ]; then
 
     printf "Modifying environment for Barrier build..."
 
+    if command -v port; then
+        printf "Detected Macports"
+
+        if [ ! -d /opt/local/lib/cmake/Qt5 ]; then
+            printf "Please install qt5-qtbase port"
+        fi
+        export BARRIER_BUILD_MACPORTS=1
+        export CMAKE_PREFIX_PATH="/opt/local/lib/cmake/Qt5:$CMAKE_PREFIX_PATH"
+        export LD_LIBRARY_PATH="/opt/local/lib:$LD_LIBRARY_PATH"
+        export CPATH="/opt/local/include:$CPATH"
+        export PKG_CONFIG_PATH="/opt/local/libexec/qt5/lib/pkgconfig:$PKG_CONFIG_PATH"
+
+    elif command -v brew; then
+        printf "Detected Homebrew"
         QT_PATH=$(brew --prefix qt)
         OPENSSL_PATH=$(brew --prefix openssl)
 
+        export BARRIER_BUILD_BREW=1
         export CMAKE_PREFIX_PATH="$QT_PATH:$CMAKE_PREFIX_PATH"
         export LD_LIBRARY_PATH="$OPENSSL_PATH/lib:$LD_LIBRARY_PATH"
         export CPATH="$OPENSSL_PATH/include:$CPATH"
         export PKG_CONFIG_PATH="$OPENSSL_PATH/lib/pkgconfig:$PKG_CONFIG_PATH"
+
+    else
+        printf "Neither Homebrew nor Macports is installed. Can't get dependency paths"
+        exit 1
+    fi
+
     export BARRIER_BUILD_ENV=1
 
     printf "done\n"

src/gui/CMakeLists.txt

@@ -6,23 +6,31 @@ set (CMAKE_AUTORCC ON)
 set (CMAKE_AUTOUIC ON)
 set (CMAKE_INCLUDE_CURRENT_DIR ON)
 
-file (GLOB GUI_SOURCE_FILES src/*.cpp src/*.h)
-file (GLOB GUI_UI_FILES src/*.ui)
-
 if (WIN32)
-    set (GUI_RC_FILES res/win/Barrier.rc)
+    set (resources res/win/Barrier.rc)
+    set (arch "win32")
+else()
+    set (arch "unix")
+endif()
+
+file (GLOB sources src/*.cpp src/${arch}/*.cpp)
+file (GLOB headers src/*.h src/${arch}/*.h)
+file (GLOB designs src/*.ui)
+
+if (BARRIER_ADD_HEADERS)
+    list (APPEND sources ${headers})
 endif()
 
 add_executable (barrier WIN32
-    ${GUI_SOURCE_FILES}
+    ${sources}
-    ${GUI_UI_FILES}
+    ${designs}
-    ${GUI_RC_FILES}
+    ${resources}
     res/Barrier.qrc
 )
 
 include_directories (./src)
 
-qt5_use_modules (barrier Core Widgets Network)
+target_link_libraries (barrier Qt5::Core Qt5::Widgets Qt5::Network)
 target_compile_definitions (barrier PRIVATE -DBARRIER_VERSION_STAGE="${BARRIER_VERSION_STAGE}")
 target_compile_definitions (barrier PRIVATE -DBARRIER_REVISION="${BARRIER_REVISION}")
 
@@ -32,7 +40,7 @@ if (WIN32)
                   HINTS ENV BONJOUR_SDK_HOME
                   PATH_SUFFIXES "Lib/x64")
     set_target_properties (barrier PROPERTIES LINK_FLAGS "/NODEFAULTLIB:LIBCMT")
-    target_link_libraries (barrier ${DNSSD_LIB})
+    target_link_libraries (barrier ${DNSSD_LIB} Ws2_32.lib Iphlpapi.lib)
 elseif (APPLE)
     find_library(APPSERVICES_LIB ApplicationServices)
     target_link_libraries(barrier ${APPSERVICES_LIB})

src/gui/src/ActionDialog.cpp

@@ -25,6 +25,7 @@
 
 #include <QtCore>
 #include <QtGui>
+#include <QButtonGroup>
 
 ActionDialog::ActionDialog(QWidget* parent, ServerConfig& config, Hotkey& hotkey, Action& action) :
     QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint),

src/gui/src/DefaultInterfaceIP.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <string>
+
+namespace Debauchee
+{
+
+std::string default_interface_ip();
+
+}

src/gui/src/NewScreenWidget.cpp

@@ -1,4 +1,4 @@
-/*
+/*
  * barrier -- mouse and keyboard sharing utility
  * Copyright (C) 2012-2016 Symless Ltd.
  * Copyright (C) 2008 Volker Lanz (vl@fidra.de)

src/gui/src/ScreenSettingsDialog.cpp

@@ -23,6 +23,19 @@
 #include <QtGui>
 #include <QMessageBox>
 
+static const QRegExp ValidScreenName("[a-z0-9\\._-]{,255}", Qt::CaseInsensitive);
+
+static QString check_name_param(QString name)
+{
+    // after internationalization happens the default name "Unnamed" might
+    // be translated with spaces (or other chars). let's replace the spaces
+    // with dashes and just give up if that doesn't pass the regexp
+    name.replace(' ', '-');
+    if (ValidScreenName.exactMatch(name))
+        return name;
+    return "";
+}
+
 ScreenSettingsDialog::ScreenSettingsDialog(QWidget* parent, Screen* pScreen) :
     QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint),
     Ui::ScreenSettingsDialogBase(),
@@ -30,13 +43,11 @@ ScreenSettingsDialog::ScreenSettingsDialog(QWidget* parent, Screen* pScreen) :
 {
     setupUi(this);
 
-    QRegExp validScreenName("[a-z0-9\\._-]{,255}", Qt::CaseInsensitive);
+    m_pLineEditName->setText(check_name_param(m_pScreen->name()));
-
+    m_pLineEditName->setValidator(new QRegExpValidator(ValidScreenName, m_pLineEditName));
-    m_pLineEditName->setText(m_pScreen->name());
-    m_pLineEditName->setValidator(new QRegExpValidator(validScreenName, m_pLineEditName));
     m_pLineEditName->selectAll();
 
-    m_pLineEditAlias->setValidator(new QRegExpValidator(validScreenName, m_pLineEditName));
+    m_pLineEditAlias->setValidator(new QRegExpValidator(ValidScreenName, m_pLineEditName));
 
     for (int i = 0; i < m_pScreen->aliases().count(); i++)
         new QListWidgetItem(m_pScreen->aliases()[i], m_pListAliases);

src/gui/src/ScreenSetupView.cpp

@@ -22,6 +22,7 @@
 
 #include <QtCore>
 #include <QtGui>
+#include <QHeaderView>
 
 ScreenSetupView::ScreenSetupView(QWidget* parent) :
     QTableView(parent)

src/gui/src/ZeroconfService.cpp

@@ -20,6 +20,7 @@
 #include "MainWindow.h"
 #include "ZeroconfRegister.h"
 #include "ZeroconfBrowser.h"
+#include "DefaultInterfaceIP.h"
 
 #include <QtNetwork>
 #include <QMessageBox>
@@ -34,12 +35,6 @@
 #include <stdlib.h>
 #endif
 
-static const QStringList preferedIPAddress(
-                QStringList() <<
-                "192.168." <<
-                "10." <<
-                "172.");
-
 const char* ZeroconfService:: m_ServerServiceName = "_barrierServerZeroconf._tcp";
 const char* ZeroconfService:: m_ClientServiceName = "_barrierClientZeroconf._tcp";
 
@@ -124,27 +119,6 @@ void ZeroconfService::errorHandle(DNSServiceErrorType errorCode)
         tr("Error code: %1.").arg(errorCode));
 }
 
-QString ZeroconfService::getLocalIPAddresses()
-{
-    QStringList addresses;
-    foreach (const QHostAddress& address, QNetworkInterface::allAddresses()) {
-        if (address.protocol() == QAbstractSocket::IPv4Protocol &&
-            address != QHostAddress(QHostAddress::LocalHost)) {
-            addresses.append(address.toString());
-        }
-    }
-
-    foreach (const QString& preferedIP, preferedIPAddress) {
-        foreach (const QString& address, addresses) {
-            if (address.startsWith(preferedIP)) {
-                return address;
-            }
-        }
-    }
-
-    return "";
-}
-
 bool ZeroconfService::registerService(bool server)
 {
     bool result = true;
@@ -159,7 +133,7 @@ bool ZeroconfService::registerService(bool server)
         else {
             m_pZeroconfRegister = new ZeroconfRegister(this);
             if (server) {
-                QString localIP = getLocalIPAddresses();
+                QString localIP = QString::fromStdString(Debauchee::default_interface_ip());
                 if (localIP.isEmpty()) {
                     QMessageBox::warning(m_pMainWindow, tr("Barrier"),
                         tr("Failed to get local IP address. "

src/gui/src/ZeroconfService.h

@@ -42,7 +42,6 @@ private slots:
     void errorHandle(DNSServiceErrorType errorCode);
 
 private:
-    QString getLocalIPAddresses();
     bool registerService(bool server);
 
 private:

src/gui/src/main.cpp

@@ -67,6 +67,13 @@ int main(int argc, char* argv[])
     /* Workaround for QTBUG-40332 - "High ping when QNetworkAccessManager is instantiated" */
     ::setenv ("QT_BEARER_POLL_TIMEOUT", "-1", 1);
 #endif
+
+#if _WIN32
+    // winsock needs to be initialized for DefaultInterfaceIP
+    WSADATA wd;
+    WSAStartup(MAKEWORD(2, 0), &wd);
+#endif
+
 	QCoreApplication::setOrganizationName("Debauchee");
 	QCoreApplication::setOrganizationDomain("github.com");
 	QCoreApplication::setApplicationName("Barrier");

src/gui/src/unix/DefaultInterfaceIP.cpp

@@ -0,0 +1,79 @@
+#include "IfAddrsResource.h"
+#include "SocketResource.h"
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#ifdef __linux__
+#include <linux/wireless.h>
+#else
+#include <net/if.h>
+#include <net/if_media.h>
+#endif
+
+#include <string>
+#include <cstring>
+
+namespace Debauchee
+{
+
+static bool is_wireless(const char * ifname, const SocketResource& sock)
+{
+#ifdef __linux__
+    struct iwreq req;
+    ::memset(&req, 0, sizeof(struct iwreq));
+    ::strncpy(req.ifr_name, ifname, IFNAMSIZ - 1);
+    return ioctl(sock, SIOCGIWMODE, &req) >= 0;
+#else
+    struct ifmediareq req;
+    ::memset(&req, 0, sizeof(struct ifmediareq));
+    ::strncpy(req.ifm_name, ifname, IFNAMSIZ - 1);
+    if (ioctl(sock, SIOCGIFMEDIA, &req) >= 0 &&
+        (req.ifm_status & IFM_AVALID)
+    ) {
+        return IFM_TYPE(req.ifm_active) == IFM_IEEE80211;
+    }
+    return false;
+#endif
+}
+
+static bool is_wireless(const char * ifname)
+{
+    if (ifname) {
+        SocketResource sock(AF_INET, SOCK_DGRAM, 0);
+        if (sock.is_valid()) {
+            return is_wireless(ifname, sock);
+        }
+    }
+    return false;
+}
+
+std::string default_interface_ip()
+{
+    std::string wirelessAddress;
+    IfAddrsResource ifa;
+    if (ifa.is_valid()) {
+        for (struct ifaddrs * next = ifa; next; next = next->ifa_next) {
+            auto sain = (struct sockaddr_in *)next->ifa_addr;
+            if (!sain || sain->sin_family != AF_INET ||
+                !(next->ifa_flags & IFF_RUNNING) ||
+                (next->ifa_flags & IFF_LOOPBACK)
+               ) {
+                continue;
+            }
+            std::string address = inet_ntoa(sain->sin_addr);
+            // take first wired address right away
+            if (!is_wireless(next->ifa_name)) {
+                return address;
+            }
+            // save first wireless address to be used if we don't find a wired one
+            if (wirelessAddress.empty()) {
+                wirelessAddress = address;
+            }
+        }
+    }
+    return wirelessAddress;
+}
+
+}
+

src/gui/src/unix/IfAddrsResource.h

@@ -0,0 +1,32 @@
+#include <sys/types.h>
+#include <ifaddrs.h>
+
+namespace Debauchee
+{
+
+class IfAddrsResource
+{
+public:
+    explicit IfAddrsResource() :
+        _valid(getifaddrs(&_ifa) == 0)
+    {
+    }
+
+    ~IfAddrsResource()
+    {
+        if (_valid) {
+            freeifaddrs(_ifa);
+        }
+    }
+
+    bool is_valid() const { return _valid; }
+
+    operator struct ifaddrs * () const { return _ifa; }
+
+private:
+    bool _valid;
+    struct ifaddrs * _ifa;
+};
+
+}
+

src/gui/src/unix/SocketResource.h

@@ -0,0 +1,32 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+namespace Debauchee
+{
+
+class SocketResource
+{
+public:
+    explicit SocketResource(int domain, int type, int protocol) :
+        _fd(socket(domain, type, protocol))
+    {
+    }
+
+    ~SocketResource()
+    {
+        if (is_valid()) {
+            close(_fd);
+        }
+    }
+
+    bool is_valid() const { return _fd >= 0; }
+
+    operator int() const { return _fd; }
+
+private:
+    int _fd;
+};
+
+}
+

src/gui/src/win32/DefaultInterfaceIP.cpp

@@ -0,0 +1,100 @@
+// REQUIRES: Ws2_32.lib, Iphlpapi.lib
+// REQUIRES: WSAStartup(..)
+
+// see comments regarding WSAAddressToStringA in address_string(..)
+#define _WINSOCK_DEPRECATED_NO_WARNINGS
+
+#include <WinSock2.h>
+#include <iphlpapi.h>
+#include <string>
+#include "HeapResource.h"
+
+namespace Debauchee
+{
+
+static ULONG get_addresses(IP_ADAPTER_ADDRESSES * addresses, PULONG sz)
+{
+    return GetAdaptersAddresses(AF_INET,
+        GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME,
+        NULL, addresses, sz);
+}
+
+static std::string address_string(const SOCKET_ADDRESS& address)
+{
+    // planning to use this with Qt but QString does not have a c'tor
+    // for wide strings so we need to force the ANSI API here
+    DWORD szStrAddress = 1023;
+    char strAddress[1024];
+    if (WSAAddressToStringA(address.lpSockaddr, address.iSockaddrLength, NULL, strAddress, &szStrAddress)) {
+        return "";
+    }
+    return strAddress;
+}
+
+static std::string first_unicast_address(IP_ADAPTER_UNICAST_ADDRESS * unicast)
+{
+    while (unicast) {
+        auto address = address_string(unicast->Address);
+        if (!address.empty()) {
+            return address;
+        }
+        unicast = unicast->Next;
+    }
+    return std::string();
+}
+
+static bool is_useable_interface(const IP_ADAPTER_ADDRESSES * ifa)
+{
+    return
+        // is an ethernet or wireless interface AND
+        (ifa->IfType == IF_TYPE_ETHERNET_CSMACD || ifa->IfType == IF_TYPE_IEEE80211) &&
+        // is up
+        ifa->OperStatus == IfOperStatusUp;
+}
+
+static std::string default_ip_address(const IP_ADAPTER_ADDRESSES * next)
+{
+    std::string wirelessAddress;
+    for ( ; next; next = next->Next) {
+        if (!is_useable_interface(next)) {
+            continue;
+        }
+        std::string address = first_unicast_address(next->FirstUnicastAddress);
+        if (address.empty()) {
+            continue;
+        }
+        // take first wired address right away
+        if (next->IfType == IF_TYPE_ETHERNET_CSMACD) {
+            return address;
+        }
+        // save first wireless address to be used if we don't find a wired one
+        if (wirelessAddress.empty()) {
+            wirelessAddress = address;
+        }
+    }
+    return wirelessAddress;
+}
+
+std::string default_interface_ip()
+{
+    const ULONG DefaultSzAddresses = 15 * 1024; // 15k recommended by msdn
+    ULONG szAddresses = DefaultSzAddresses;
+    HeapResource<IP_ADAPTER_ADDRESSES> addresses(GetProcessHeap(), 0, DefaultSzAddresses);
+    if (addresses.is_valid()) {
+        ULONG result;
+        while (ERROR_BUFFER_OVERFLOW == (result = get_addresses(addresses, &szAddresses))) {
+            // add more space in case more adapters have shown up
+            szAddresses += DefaultSzAddresses;
+            swap(addresses, HeapResource<IP_ADAPTER_ADDRESSES>(GetProcessHeap(), 0, szAddresses));
+            if (!addresses.is_valid()) {
+                break;
+            }
+        }
+        if (result == ERROR_SUCCESS) {
+            return default_ip_address(addresses);
+        }
+    }
+    return std::string();
+}
+
+}

src/gui/src/win32/HeapResource.h

@@ -0,0 +1,48 @@
+#pragma once
+
+namespace Debauchee
+{
+
+template<class T>
+class HeapResource
+{
+public:
+    explicit HeapResource(HANDLE heap, DWORD flags, SIZE_T sz) :
+        _heap(heap),
+        _flags(flags),
+        _mem((T*)HeapAlloc(heap, flags, sz))
+    {
+    }
+
+    HeapResource(HeapResource<T>&& other)
+        : _mem(NULL)
+    {
+        swap(*this, other);
+    }
+
+    ~HeapResource()
+    {
+        if (is_valid()) {
+            HeapFree(_heap, _flags, _mem);
+        }
+    }
+
+    friend void swap(HeapResource<T>& first, HeapResource<T>& second)
+    {
+        using std::swap;
+        swap(first._heap, second._heap);
+        swap(first._flags, second._flags);
+        swap(first._mem, second._mem);
+    }
+
+    bool is_valid() const { return _mem != NULL; }
+
+    operator T*() const { return _mem; }
+
+private:
+    HANDLE _heap;
+    DWORD _flags;
+    T * _mem;
+};
+
+}

src/lib/platform/OSXScreen.h

@@ -144,10 +144,10 @@ private:
     ButtonID            mapMacButtonToBarrier(UInt16) const;
 
     // map mac scroll wheel value to a barrier scroll wheel value
-    SInt32                mapScrollWheelToBarrier(SInt32) const;
+    SInt32                mapScrollWheelToBarrier(float) const;
 
     // map barrier scroll wheel value to a mac scroll wheel value
-    SInt32                mapScrollWheelFromBarrier(SInt32) const;
+    SInt32                mapScrollWheelFromBarrier(float) const;
 
     // get the current scroll wheel speed
     double                getScrollSpeed() const;

src/lib/platform/OSXScreen.mm

@@ -1421,7 +1421,7 @@ OSXScreen::mapMacButtonToBarrier(UInt16 macButton) const
 }
 
 SInt32
-OSXScreen::mapScrollWheelToBarrier(SInt32 x) const
+OSXScreen::mapScrollWheelToBarrier(float x) const
 {
 	// return accelerated scrolling but not exponentially scaled as it is
 	// on the mac.
@@ -1430,7 +1430,7 @@ OSXScreen::mapScrollWheelToBarrier(SInt32 x) const
 }
 
 SInt32
-OSXScreen::mapScrollWheelFromBarrier(SInt32 x) const
+OSXScreen::mapScrollWheelFromBarrier(float x) const
 {
 	// use server's acceleration with a little boost since other platforms
 	// take one wheel step as a larger step than the mac does.
@@ -1948,9 +1948,9 @@ OSXScreen::handleCGInputEvent(CGEventTapProxy proxy,
 			break;
 		case kCGEventScrollWheel:
 			screen->onMouseWheel(screen->mapScrollWheelToBarrier(
-								 CGEventGetIntegerValueField(event, kCGScrollWheelEventDeltaAxis2)),
+								 CGEventGetIntegerValueField(event, kCGScrollWheelEventFixedPtDeltaAxis2) / 65536.0f),
 								 screen->mapScrollWheelToBarrier(
-								 CGEventGetIntegerValueField(event, kCGScrollWheelEventDeltaAxis1)));
+								 CGEventGetIntegerValueField(event, kCGScrollWheelEventFixedPtDeltaAxis1) / 65536.0f));
 			break;
 		case kCGEventKeyDown:
 		case kCGEventKeyUp:

src/lib/platform/XWindowsScreen.cpp

@@ -99,6 +99,7 @@ XWindowsScreen::XWindowsScreen(
 		IEventQueue* events) :
 	m_isPrimary(isPrimary),
 	m_mouseScrollDelta(mouseScrollDelta),
+    m_accumulatedScroll(0),
 	m_display(NULL),
 	m_root(None),
 	m_window(None),
@@ -865,9 +866,11 @@ XWindowsScreen::fakeMouseWheel(SInt32, SInt32 yDelta) const
 		return;
 	}
 
+    int numEvents = accumulateMouseScroll(yDelta);
+
     // choose button depending on rotation direction
     const unsigned int xButton = mapButtonToX(static_cast<ButtonID>(
-												(yDelta >= 0) ? -1 : -2));
+												(numEvents >= 0) ? -1 : -2));
 	if (xButton == 0) {
 		// If we get here, then the XServer does not support the scroll
 		// wheel buttons, so send PageUp/PageDown keystrokes instead.
@@ -886,20 +889,14 @@ XWindowsScreen::fakeMouseWheel(SInt32, SInt32 yDelta) const
 		return;
 	}
 
-	// now use absolute value of delta
+    numEvents = std::abs(numEvents);
-	if (yDelta < 0) {
-		yDelta = -yDelta;
-	}
-
-	if (yDelta < m_mouseScrollDelta) {
-		LOG((CLOG_WARN "Wheel scroll delta (%d) smaller than threshold (%d)", yDelta, m_mouseScrollDelta));
-	}
 
 	// send as many clicks as necessary
-	for (; yDelta >= m_mouseScrollDelta; yDelta -= m_mouseScrollDelta) {
+    for (; numEvents > 0; numEvents--) {
 		XTestFakeButtonEvent(m_display, xButton, True, CurrentTime);
 		XTestFakeButtonEvent(m_display, xButton, False, CurrentTime);
 	}
+
 	XFlush(m_display);
 }
 
@@ -1643,6 +1640,15 @@ XWindowsScreen::onMouseMove(const XMotionEvent& xmotion)
 	}
 }
 
+int
+XWindowsScreen::accumulateMouseScroll(SInt32 yDelta) const
+{
+    m_accumulatedScroll += yDelta;
+    int numEvents = m_accumulatedScroll / m_mouseScrollDelta;
+    m_accumulatedScroll -= numEvents * m_mouseScrollDelta;
+    return numEvents;
+}
+
 Cursor
 XWindowsScreen::createBlankCursor() const
 {

src/lib/platform/XWindowsScreen.h

@@ -136,6 +136,10 @@ private:
     void                onMouseRelease(const XButtonEvent&);
     void                onMouseMove(const XMotionEvent&);
 
+    // Returns the number of scroll events needed after the current delta has
+    // been taken into account
+    int                 accumulateMouseScroll(SInt32 yDelta) const;
+
     bool                detectXI2();
 #ifdef HAVE_XI2
     void                selectXIRawMotion();
@@ -172,8 +176,15 @@ private:
 
     // true if screen is being used as a primary screen, false otherwise
     bool                m_isPrimary;
+
+    // The size of a smallest supported scroll event, in points
     int                 m_mouseScrollDelta;
 
+    // Accumulates scrolls of less than m_mouseScrollDelta across multiple
+    // scroll events. We dispatch a scroll event whenever the accumulated scroll
+    // becomes larger than m_mouseScrollDelta
+    mutable int         m_accumulatedScroll;
+
     Display*            m_display;
     Window                m_root;
     Window                m_window;