插件dev：如何仅搜索DLTK/PDT插件中的接口？

Question

我开发PDT插件的扩展。我只需要与接口进行对话（不是类）。基本的代码看起来：

OpenTypeSelectionDialog2 dialog = new OpenTypeSelectionDialog2(
    DLTKUIPlugin.getActiveWorkbenchShell(), 
    multi, 
    PlatformUI.getWorkbench().getProgressService(), 
    null, 
    type, 
    PHPUILanguageToolkit.getInstance()); 

这是正常工作，但我得到的类和接口一起（类型变量）。有什么方法可以过滤吗？我无法在PDT中找到这种机制，但可以正确识别类和接口（名称旁边的图标）。

Answer 1

我不知道它是否是最好的解决方案，但它的工作原理。

int falseFlags = 0; 
int trueFlags = 0; 

IDLTKSearchScope scope = SearchEngine.createSearchScope(getScriptFolder().getScriptProject()); 

trueFlags = PHPFlags.AccInterface; 

OpenTypeSelectionDialog2 dialog = new OpenTypeSelectionDialog2(
    DLTKUIPlugin.getActiveWorkbenchShell(), 
    multi, 
    PlatformUI.getWorkbench().getProgressService(), 
    scope, 
    IDLTKSearchConstants.TYPE, 
    new PHPTypeSelectionExtension(trueFlags, falseFlags), 
    PHPUILanguageToolkit.getInstance()); 

而且PHPTypeSelectionExtension看起来是这样的：

public class PHPTypeSelectionExtension extends TypeSelectionExtension { 

/** 
* @see PHPFlags 
*/ 
private int trueFlags = 0; 
private int falseFlags = 0; 

public PHPTypeSelectionExtension() { 
} 

public PHPTypeSelectionExtension(int trueFlags, int falseFlags) { 
    super(); 
    this.trueFlags = trueFlags; 
    this.falseFlags = falseFlags; 
} 

@Override 
public ITypeInfoFilterExtension getFilterExtension() { 
    return new ITypeInfoFilterExtension() { 
     @Override 
     public boolean select(ITypeInfoRequestor typeInfoRequestor) { 
      if (falseFlags != 0 && (falseFlags & typeInfoRequestor.getModifiers()) != 0) { 

       // Try to filter by black list. 
       return false; 
      } else if (trueFlags == 0 || (trueFlags & typeInfoRequestor.getModifiers()) != 0) { 

       // Try to filter by white list, if trueFlags == 0 this is fine 'couse we pass black list. 
       return true; 
      } else { 

       // Rest is filter out. 
       return false; 
      } 
     } 
    }; 
} 

@SuppressWarnings("restriction") 
@Override 
public ISelectionStatusValidator getSelectionValidator() { 
    return new TypedElementSelectionValidator(new Class[] {IType.class, INamespace.class}, false); 
} 

}