菜单项 shown/hidden 取决于 plugin.xml 中的 os.name

Question

我在 plugin.xml 中使用这种代码是为了 show/hide 菜单项取决于 OS 类型：

<menu label="Help">
    <command commandId="org.eclipse.ui.help.aboutAction" style="push">
        <visibleWhen checkEnabled="false">
            <not>
                <systemTest property="os.name" value="Mac OS X">
                </systemTest>
            </not>
        </visibleWhen>
    </command>
</menu>

问题是System.getProperty("os.name")返回的os.name好像不太规范。它可以依赖 OS 版本，专门针对 Microsoft Windows.

我想知道是否有最佳实践？

Answer 1

osgi.os 环境变量对 OS 有一个更明确的值。此值在 org.eclipse.osgi.service.environment.Constants:

中定义

public static final String OS_WIN32 = "win32";
public static final String OS_LINUX = "linux";
public static final String OS_AIX = "aix";
public static final String OS_SOLARIS = "solaris";
public static final String OS_HPUX = "hpux";
public static final String OS_QNX = "qnx";
public static final String OS_MACOSX = "macosx";
public static final String OS_EPOC32 = "epoc32";
public static final String OS_OS400 = "os/400"; 
public static final String OS_OS390 = "os/390"; 
public static final String OS_ZOS = "z/os"; 
public static final String OS_UNKNOWN = "unknown";

注意：尽管它的名称（以及 Constants class 中的注释）win32 适用于 32 位和 64 位 Windows。

处理器架构还有osgi.arch：

public static final String ARCH_X86 = "x86";
public static final String ARCH_X86_64 = "x86_64";
public static final String ARCH_PA_RISC = "PA_RISC";
public static final String ARCH_PPC = "ppc";
public static final String ARCH_PPC64 = "ppc64";
public static final String ARCH_SPARC = "sparc";
public static final String ARCH_IA64 = "ia64"; 
public static final String ARCH_IA64_32 = "ia64_32";

最后osgi.ws给出窗口系统：

public static final String WS_WIN32 = "win32";
public static final String WS_WPF = "wpf"; 
public static final String WS_MOTIF = "motif";
public static final String WS_GTK = "gtk";
public static final String WS_PHOTON = "photon";
public static final String WS_CARBON = "carbon";
public static final String WS_COCOA = "cocoa";
public static final String WS_S60 = "s60";
public static final String WS_UNKNOWN = "unknown";

菜单项 shown/hidden 取决于 plugin.xml 中的 os.name

Menu item shown/hidden depending on os.name in plugin.xml

java

eclipse

eclipse-plugin

eclipse-rcp