Examples with ExpressionTypeProvider com.intellij.lang.ExpressionTypeProvider used on opensource projects

Example 1 with ExpressionTypeProvider

use of com.intellij.lang.ExpressionTypeProvider in project intellij-community by JetBrains.

the class ShowExpressionTypeHandler method invoke.

public void invoke(@NotNull final Project project, @NotNull final Editor editor, @NotNull PsiFile file) {
    ApplicationManager.getApplication().assertIsDispatchThread();
    Language language = PsiUtilCore.getLanguageAtOffset(file, editor.getCaretModel().getOffset());
    final Set<ExpressionTypeProvider> handlers = getHandlers(project, language, file.getViewProvider().getBaseLanguage());
    if (handlers.isEmpty())
        return;
    boolean exactRange = false;
    TextRange range = EditorUtil.getSelectionInAnyMode(editor);
    final Map<PsiElement, ExpressionTypeProvider> map = ContainerUtil.newLinkedHashMap();
    int offset = TargetElementUtil.adjustOffset(file, editor.getDocument(), editor.getCaretModel().getOffset());
    for (int i = 0; i < 3 && map.isEmpty() && offset > i; i++) {
        PsiElement elementAt = file.findElementAt(offset - i);
        if (elementAt == null)
            continue;
        for (ExpressionTypeProvider handler : handlers) {
            for (PsiElement element : ((ExpressionTypeProvider<? extends PsiElement>) handler).getExpressionsAt(elementAt)) {
                TextRange r = element.getTextRange();
                if (exactRange && !r.equals(range) || !r.contains(range))
                    continue;
                if (!exactRange)
                    exactRange = r.equals(range);
                map.put(element, handler);
            }
        }
    }
    Pass<PsiElement> callback = new Pass<PsiElement>() {

        @Override
        public void pass(@NotNull PsiElement expression) {
            //noinspection unchecked
            ExpressionTypeProvider<PsiElement> provider = ObjectUtils.assertNotNull(map.get(expression));
            final String informationHint = provider.getInformationHint(expression);
            TextRange range = expression.getTextRange();
            editor.getSelectionModel().setSelection(range.getStartOffset(), range.getEndOffset());
            ApplicationManager.getApplication().invokeLater(() -> HintManager.getInstance().showInformationHint(editor, informationHint));
        }
    };
    if (map.isEmpty()) {
        ApplicationManager.getApplication().invokeLater(() -> {
            String errorHint = ObjectUtils.assertNotNull(ContainerUtil.getFirstItem(handlers)).getErrorHint();
            HintManager.getInstance().showErrorHint(editor, errorHint);
        });
    } else if (map.size() == 1) {
        callback.pass(ObjectUtils.assertNotNull(ContainerUtil.getFirstItem(map.keySet())));
    } else {
        IntroduceTargetChooser.showChooser(editor, ContainerUtil.newArrayList(map.keySet()), callback, expression -> expression.getText());
    }
}