SmartCompletion results

Created December 23, 2008 17:49

Hello,

Is it possible to know how many items SmartCompletion would return without triggering SmartCodeCompletionAction?
In 7th version of IDEA there were very nice method SmartCodeCompletionHandler::getLookupData but now it's gone.

Thanks.
:sergiy

6 comments

Dmitry Jemerov

Created December 23, 2008 17:52

Hello Sergiy,

Is it possible to know how many items SmartCompletion would return
without triggering SmartCodeCompletionAction?

In 7th version of IDEA there were very nice method
SmartCodeCompletionHandler::getLookupData but now it's gone.

The list of items for code completion is now filled asynchronously, so there
is no way to fetch the number of items in advance.

--
Dmitry Jemerov
Development Lead
JetBrains, Inc.
http://www.jetbrains.com/
"Develop with Pleasure!"

Peter Gromov

Created December 23, 2008 18:34

CompletionService.performCompletion(new CompletionParameters(...), ]]>).

Please note that this process can take a very long time, so use it wisely.

Sergiy Dubovik

Created December 23, 2008 18:38

Thanks Dmitry,

Actually I don't need to know all lookup items, it's enough to know that there is at least one. Is it possible to find out if "there is something to suggest"?
I'm trying to port to 8th this plugin http://plugins.intellij.net/plugin/?id=1315

:sergiy

Sergiy Dubovik

Created December 23, 2008 22:03

Thanks Peter.
Does this look right?

public class NextGenCompletion extends AnAction {
    public void actionPerformed(AnActionEvent e) {
        final Project project = e.getData(DataKeys.PROJECT);
        if(project == null)
            return;

        final PsiFile psiFile = e.getData(DataKeys.PSI_FILE);
        if (psiFile == null)
            return;

        final Editor editor = e.getData(DataKeys.EDITOR);
        if (editor == null)
            return;

        int offset = editor.getCaretModel().getOffset();
        PsiElement psiElement = psiFile.findElementAt(offset);
        if(psiElement == null)
            return;

        CompletionParameters parameters = new CompletionParameters(psiElement, psiFile, CompletionType.SMART, offset, 1);
        Consumer<LookupElement> consumer = new Consumer<LookupElement>() {
            public void consume(LookupElement lookupElement) {
                System.out.println("lookupString = " + lookupElement.getLookupString());
            }
        };

        CompletionService.getCompletionService().performCompletion(parameters, consumer);
    }
}

I get NullPointerException instead of lookup strings in a console, I guess doing something wrong...

java.lang.NullPointerException
at com.intellij.codeInsight.completion.JavaMethodMergingContributor.fillCompletionVariants(JavaMethodMergingContributor.java:7)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:78)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:69)
at com.intellij.codeInsight.completion.CompletionService.performCompletion(CompletionService.java:106)
at org.dubikdev.codecompletionng.NextGenCompletion.actionPerformed(NextGenCompletion.java:46)
at com.intellij.openapi.actionSystem.impl.ActionButton.a(ActionButton.java:61)
at com.intellij.openapi.actionSystem.impl.ActionButton.a(ActionButton.java:89)
at com.intellij.openapi.actionSystem.impl.ActionButton.processMouseEvent(ActionButton.java:23)
at java.awt.Component.processEvent(Component.java:5367)
at java.awt.Container.processEvent(Container.java:2010)
at java.awt.Component.dispatchEventImpl(Component.java:4068)
at java.awt.Container.dispatchEventImpl(Container.java:2068)
at java.awt.Component.dispatchEvent(Component.java:3903)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
at java.awt.Container.dispatchEventImpl(Container.java:2054)
at java.awt.Window.dispatchEventImpl(Window.java:1801)
at java.awt.Component.dispatchEvent(Component.java:3903)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:35)
at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:223)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:217)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

:sergiy

Peter Gromov

Created December 24, 2008 11:53

Oh yes. Some completion clients assume that when they are invoked, a
full-blown completion is in progress. And I can understand that. Will be
fixed in next EAP.

Sergiy Dubovik

Created December 25, 2008 11:44

Thanks Peter, looking forward.

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