Java 类org.eclipse.core.runtime.ProgressMonitorWrapper 实例源码

private IProgressMonitor getSubMonitor(IProgressMonitor monitor) {
    // we need to use the parent SubMonitor otherwise SubMonitor#worked, etc doesn't work?
    // See article
    // https://medium.com/@jgwest/debugging-eclipse-subprogressmonitor-and-submonitor-0-work-completed-or-work-not-reported-f482c71cc85c
    if (monitor instanceof ProgressMonitorWrapper) {
        return getSubMonitor(((ProgressMonitorWrapper) monitor).getWrappedProgressMonitor());
    }
    return monitor;
}

private List<CompletionItem> computeContentAssist(ICompilationUnit unit, int line, int column, IProgressMonitor monitor) throws JavaModelException {
    CompletionResponses.clear();
    if (unit == null) {
        return Collections.emptyList();
    }
    List<CompletionItem> proposals = new ArrayList<>();

    final int offset = JsonRpcHelpers.toOffset(unit.getBuffer(), line, column);
    CompletionProposalRequestor collector = new CompletionProposalRequestor(unit, offset);
    // Allow completions for unresolved types - since 3.3
    collector.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.TYPE_REF, true);
    collector.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.TYPE_IMPORT, true);
    collector.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.FIELD_IMPORT, true);

    collector.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.TYPE_REF, true);
    collector.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.TYPE_IMPORT, true);
    collector.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.METHOD_IMPORT, true);

    collector.setAllowsRequiredProposals(CompletionProposal.CONSTRUCTOR_INVOCATION, CompletionProposal.TYPE_REF, true);

    collector.setAllowsRequiredProposals(CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION, CompletionProposal.TYPE_REF, true);
    collector.setAllowsRequiredProposals(CompletionProposal.ANONYMOUS_CLASS_DECLARATION, CompletionProposal.TYPE_REF, true);

    collector.setAllowsRequiredProposals(CompletionProposal.TYPE_REF, CompletionProposal.TYPE_REF, true);

    if (offset >-1 && !monitor.isCanceled()) {
        IBuffer buffer = unit.getBuffer();
        if (buffer != null && buffer.getLength() >= offset) {
            IProgressMonitor subMonitor = new ProgressMonitorWrapper(monitor) {
                private long timeLimit;
                private static final long TIMEOUT = 5000;

                @Override
                public void beginTask(String name, int totalWork) {
                    timeLimit = System.currentTimeMillis() + TIMEOUT;
                }

                @Override
                public boolean isCanceled() {
                    return super.isCanceled() || timeLimit <= System.currentTimeMillis();
                }

            };
            try {
                unit.codeComplete(offset, collector, subMonitor);
                proposals.addAll(collector.getCompletionItems());
            } catch (OperationCanceledException e) {
                monitor.setCanceled(true);
            }
        }
    }
    return proposals;
}