/**
* Invoke content assist on the given viewer at the given offset, for the given number of pages
* and return the results of each page
*
* @param viewer
* @param offset
* @param pageCount
* @return
* @throws Exception
*/
private static ICompletionProposal[][] getProposals(
StructuredTextViewer viewer, int offset, int pageCount) throws Exception {
// setup the viewer
StructuredTextViewerConfigurationHTML configuration =
new StructuredTextViewerConfigurationHTML();
ContentAssistant contentAssistant =
(ContentAssistant) configuration.getContentAssistant(viewer);
viewer.configure(configuration);
viewer.setSelectedRange(offset, 0);
// get the processor
String partitionTypeID = viewer.getDocument().getPartition(offset).getType();
IContentAssistProcessor processor = contentAssistant.getContentAssistProcessor(partitionTypeID);
// fire content assist session about to start
Method privateFireSessionBeginEventMethod =
ContentAssistant.class.getDeclaredMethod(
"fireSessionBeginEvent", new Class[] {boolean.class});
privateFireSessionBeginEventMethod.setAccessible(true);
privateFireSessionBeginEventMethod.invoke(contentAssistant, new Object[] {Boolean.TRUE});
// get content assist suggestions
ICompletionProposal[][] pages = new ICompletionProposal[pageCount][];
for (int p = 0; p < pageCount; ++p) {
pages[p] = processor.computeCompletionProposals(viewer, offset);
}
// fire content assist session ending
Method privateFireSessionEndEventMethod =
ContentAssistant.class.getDeclaredMethod("fireSessionEndEvent", null);
privateFireSessionEndEventMethod.setAccessible(true);
privateFireSessionEndEventMethod.invoke(contentAssistant, null);
return pages;
}
/**
* Run a proposal test by opening the given file and invoking content assist for each expected
* proposal count at the given line number and line character offset and then compare the number
* of proposals for each invocation (pages) to the expected number of proposals.
*
* @param fileName
* @param lineNum
* @param lineRelativeCharOffset
* @param expectedProposalCounts
* @throws Exception
*/
private static void runProposalTest(
String fileName, int lineNum, int lineRelativeCharOffset, int[] expectedProposalCounts)
throws Exception {
IFile file = getFile(fileName);
StructuredTextEditor editor = getEditor(file);
StructuredTextViewer viewer = editor.getTextViewer();
int offset = viewer.getDocument().getLineOffset(lineNum) + lineRelativeCharOffset;
ICompletionProposal[][] pages = getProposals(viewer, offset, expectedProposalCounts.length);
verifyProposalCounts(pages, expectedProposalCounts);
}
