Examples with RegExpPattern org.intellij.lang.regexp.psi.RegExpPattern used on opensource projects

Example 6 with RegExpPattern

use of org.intellij.lang.regexp.psi.RegExpPattern in project intellij-community by JetBrains.

the class ValueRegExpAnnotator method annotate.

public void annotate(@NotNull PsiElement psiElement, @NotNull AnnotationHolder holder) {
    if (psiElement instanceof RegExpFile && psiElement.getCopyableUserData(KEY) == Boolean.TRUE) {
        final PsiElement pattern = psiElement.getFirstChild();
        if (!(pattern instanceof RegExpPattern)) {
            return;
        }
        final RegExpBranch[] branches = ((RegExpPattern) pattern).getBranches();
        if (branches.length == 1 && branches[0].getAtoms().length == 0) {
            return;
        }
        for (RegExpBranch branch : branches) {
            final int[] count = new int[1];
            branch.accept(new RegExpRecursiveElementVisitor() {

                @Override
                public void visitRegExpGroup(RegExpGroup group) {
                    if (group.isCapturing()) {
                        count[0]++;
                    }
                    super.visitRegExpGroup(group);
                }
            });
            if (count[0] != 1) {
                holder.createWarningAnnotation(branch, "The pattern should contain exactly one capturing group");
            }
        }
    }
}