Java Code Examples for org.eclipse.lsp4j.TextDocumentContentChangeEvent#setRangeLength()

protected void changeDocument(ICompilationUnit unit, String content, int version, Range range, int length) {
	DidChangeTextDocumentParams changeParms = new DidChangeTextDocumentParams();
	VersionedTextDocumentIdentifier textDocument = new VersionedTextDocumentIdentifier();
	textDocument.setUri(JDTUtils.toURI(unit));
	textDocument.setVersion(version);
	changeParms.setTextDocument(textDocument);
	TextDocumentContentChangeEvent event = new TextDocumentContentChangeEvent();
	if (range != null) {
		event.setRange(range);
		event.setRangeLength(length);
	}
	event.setText(content);
	List<TextDocumentContentChangeEvent> contentChanges = new ArrayList<>();
	contentChanges.add(event);
	changeParms.setContentChanges(contentChanges);
	lifeCycleHandler.didChange(changeParms);
}
 

private void changeDocument(ICompilationUnit cu, String content, int version, Range range, int length) throws JavaModelException {
	DidChangeTextDocumentParams changeParms = new DidChangeTextDocumentParams();
	VersionedTextDocumentIdentifier textDocument = new VersionedTextDocumentIdentifier();
	textDocument.setUri(JDTUtils.toURI(cu));
	textDocument.setVersion(version);
	changeParms.setTextDocument(textDocument);
	TextDocumentContentChangeEvent event = new TextDocumentContentChangeEvent();
	if (range != null) {
		event.setRange(range);
		event.setRangeLength(length);
	}
	event.setText(content);
	List<TextDocumentContentChangeEvent> contentChanges = new ArrayList<>();
	contentChanges.add(event);
	changeParms.setContentChanges(contentChanges);
	lifeCycleHandler.didChange(changeParms);
}
 

@Test
void testDidChangeWithRange() {
	DidOpenTextDocumentParams openParams = new DidOpenTextDocumentParams();
	openParams.setTextDocument(new TextDocumentItem("file.txt", "plaintext", 1, "hello world"));
	tracker.didOpen(openParams);
	DidChangeTextDocumentParams changeParams = new DidChangeTextDocumentParams();
	changeParams.setTextDocument(new VersionedTextDocumentIdentifier("file.txt", 2));
	TextDocumentContentChangeEvent changeEvent = new TextDocumentContentChangeEvent();
	changeEvent.setText(", friend");
	changeEvent.setRange(new Range(new Position(0, 5), new Position(0, 11)));
	changeEvent.setRangeLength(6);
	changeParams.setContentChanges(Collections.singletonList(changeEvent));
	tracker.didChange(changeParams);
	Assertions.assertEquals("hello, friend", tracker.getContents(URI.create("file.txt")));
}
 

@Test
void testDidChangeWithRangeMultiline() {
	DidOpenTextDocumentParams openParams = new DidOpenTextDocumentParams();
	openParams.setTextDocument(new TextDocumentItem("file.txt", "plaintext", 1, "hello\nworld"));
	tracker.didOpen(openParams);
	DidChangeTextDocumentParams changeParams = new DidChangeTextDocumentParams();
	changeParams.setTextDocument(new VersionedTextDocumentIdentifier("file.txt", 2));
	TextDocumentContentChangeEvent changeEvent = new TextDocumentContentChangeEvent();
	changeEvent.setText("affles");
	changeEvent.setRange(new Range(new Position(1, 1), new Position(1, 5)));
	changeEvent.setRangeLength(4);
	changeParams.setContentChanges(Collections.singletonList(changeEvent));
	tracker.didChange(changeParams);
	Assertions.assertEquals("hello\nwaffles", tracker.getContents(URI.create("file.txt")));
}
 

/**
 * Convert IntelliJ {@link DocumentEvent} to LS according {@link TextDocumentSyncKind}.
 *
 * @param event
 *            IntelliJ {@link DocumentEvent}
 * @return true if change event is ready to be sent
 */
private boolean createChangeEvent(DocumentEvent event) {
    changeParams = new DidChangeTextDocumentParams(new VersionedTextDocumentIdentifier(), Collections.singletonList(new TextDocumentContentChangeEvent()));
    changeParams.getTextDocument().setUri(fileUri.toString());

    Document document = event.getDocument();
    TextDocumentContentChangeEvent changeEvent = null;
    TextDocumentSyncKind syncKind = getTextDocumentSyncKind();
    switch (syncKind) {
        case None:
            return false;
        case Full:
            changeParams.getContentChanges().get(0).setText(event.getDocument().getText());
            break;
        case Incremental:
            changeEvent = changeParams.getContentChanges().get(0);
            CharSequence newText = event.getNewFragment();
            int offset = event.getOffset();
            int length = event.getOldLength();
            try {
                // try to convert the Eclipse start/end offset to LS range.
                Range range = new Range(LSPIJUtils.toPosition(offset, document),
                        LSPIJUtils.toPosition(offset + length, document));
                changeEvent.setRange(range);
                changeEvent.setText(newText.toString());
                changeEvent.setRangeLength(length);
            } finally {
            }
            break;
    }
    return true;
}
 

public void documentChanged(DocumentEvent event) {
    if (editor.isDisposed()) {
        return;
    }
    if (event.getDocument() == editor.getDocument()) {
        //Todo - restore when adding hover support
        // long predTime = System.nanoTime(); //So that there are no hover events while typing
        changesParams.getTextDocument().setVersion(version++);

        if (syncKind == TextDocumentSyncKind.Incremental) {
            TextDocumentContentChangeEvent changeEvent = changesParams.getContentChanges().get(0);
            CharSequence newText = event.getNewFragment();
            int offset = event.getOffset();
            int newTextLength = event.getNewLength();
            Position lspPosition = DocumentUtils.offsetToLSPPos(editor, offset);
            int startLine = lspPosition.getLine();
            int startColumn = lspPosition.getCharacter();
            CharSequence oldText = event.getOldFragment();

            //if text was deleted/replaced, calculate the end position of inserted/deleted text
            int endLine, endColumn;
            if (oldText.length() > 0) {
                endLine = startLine + StringUtil.countNewLines(oldText);
                String[] oldLines = oldText.toString().split("\n");
                int oldTextLength = oldLines.length == 0 ? 0 : oldLines[oldLines.length - 1].length();
                endColumn = oldLines.length == 1 ? startColumn + oldTextLength : oldTextLength;
            } else { //if insert or no text change, the end position is the same
                endLine = startLine;
                endColumn = startColumn;
            }
            Range range = new Range(new Position(startLine, startColumn), new Position(endLine, endColumn));
            changeEvent.setRange(range);
            changeEvent.setRangeLength(newTextLength);
            changeEvent.setText(newText.toString());
        } else if (syncKind == TextDocumentSyncKind.Full) {
            changesParams.getContentChanges().get(0).setText(editor.getDocument().getText());
        }
        requestManager.didChange(changesParams);
    } else {
        LOG.error("Wrong document for the EditorEventManager");
    }
}