Method navigationWidgetForPosition

plugins/contextbrowser/contextbrowser.cpp:544–653

}

QWidget* ContextBrowserPlugin::navigationWidgetForPosition(KTextEditor::View* view, KTextEditor::Cursor position,
                                                           KTextEditor::Range& itemRange)
{
    QUrl viewUrl = view->document()->url();
    const auto languages = ICore::self()->languageController()->languagesForUrl(viewUrl);

    DUChainReadLocker lock(DUChain::lock());

    for (const auto language : languages) {
        auto widget = language->specialLanguageObjectNavigationWidget(viewUrl, position);
        auto navigationWidget = qobject_cast<AbstractNavigationWidget*>(widget.first);
        if (navigationWidget) {
            itemRange = widget.second;
            return navigationWidget;
        }
    }

    // Find problems under the cursor (first pass)
    TopDUContext* topContext = DUChainUtils::standardContextForUrl(view->document()->url());
    QVector<KDevelop::IProblem::Ptr> problems;
    if (topContext) {
        problems = findProblemsUnderCursor(topContext, position, itemRange);
    }

    // Find decl (declaration) under the cursor
    const auto itemUnderCursor = DUChainUtils::itemUnderCursor(viewUrl, position);
    auto declUnderCursor = itemUnderCursor.declaration;
    Declaration* decl = DUChainUtils::declarationForDefinition(declUnderCursor);
    if (decl && decl->kind() == Declaration::Alias) {
        auto* alias = dynamic_cast<AliasDeclaration*>(decl);
        Q_ASSERT(alias);
        decl = alias->aliasedDeclaration().declaration();
    }

    // Return nullptr if the found problems / decl are already being shown in the tool tip currently.
    if (m_currentToolTip &&
        problems == m_currentToolTipProblems &&
        IndexedDeclaration(decl) == m_currentToolTipDeclaration) {
        return nullptr;
    }

    // Create a widget for problems, if any have been found.
    AbstractNavigationWidget* problemWidget = nullptr;
    if (!problems.isEmpty()) {
        problemWidget = new AbstractNavigationWidget;
        auto context = new ProblemNavigationContext(problems);
        context->setTopContext(TopDUContextPointer(topContext));
        problemWidget->setContext(NavigationContextPointer(context));
    }

    // Let the context create a widget for decl, if there is one.
    // Note that createNavigationWidget() might also return nullptr for a valid decl however.
    AbstractNavigationWidget* declWidget = nullptr;
    if (decl) {
        if (itemRange.isValid()) {
            itemRange.expandToRange(itemUnderCursor.range);
        } else {
            itemRange = itemUnderCursor.range;