private boolean isTrivial(PsiMethod method) {
final PsiCodeBlock body = method.getBody();
if (body == null) {
return true;
}
final PsiStatement[] statements = body.getStatements();
if (statements.length == 0) {
return true;
}
final Project project = method.getProject();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiConstantEvaluationHelper evaluationHelper = psiFacade.getConstantEvaluationHelper();
for (PsiStatement statement : statements) {
if (!(statement instanceof PsiIfStatement)) {
return false;
}
final PsiIfStatement ifStatement = (PsiIfStatement) statement;
final PsiExpression condition = ifStatement.getCondition();
final Object result = evaluationHelper.computeConstantExpression(condition);
if (result == null || !result.equals(Boolean.FALSE)) {
return false;
}
}
return true;
}
@Override
public JComponent getPreviewComponent(@NotNull PsiElement element) {
final PsiNewExpression psiNewExpression =
PsiTreeUtil.getParentOfType(element, PsiNewExpression.class);
if (psiNewExpression != null) {
final PsiJavaCodeReferenceElement referenceElement =
PsiTreeUtil.getChildOfType(psiNewExpression, PsiJavaCodeReferenceElement.class);
if (referenceElement != null) {
final PsiReference reference = referenceElement.getReference();
if (reference != null) {
final PsiElement psiElement = reference.resolve();
if (psiElement instanceof PsiClass
&& "java.awt.Color".equals(((PsiClass) psiElement).getQualifiedName())) {
final PsiExpressionList argumentList = psiNewExpression.getArgumentList();
if (argumentList != null) {
final PsiExpression[] expressions = argumentList.getExpressions();
int[] values = ArrayUtil.newIntArray(expressions.length);
float[] values2 = new float[expressions.length];
int i = 0;
int j = 0;
final PsiConstantEvaluationHelper helper =
JavaPsiFacade.getInstance(element.getProject()).getConstantEvaluationHelper();
for (final PsiExpression each : expressions) {
final Object o = helper.computeConstantExpression(each);
if (o instanceof Integer) {
values[i] = ((Integer) o).intValue();
if (expressions.length != 1) {
values[i] = values[i] > 255 ? 255 : values[i] < 0 ? 0 : values[i];
}
i++;
} else if (o instanceof Float) {
values2[j] = ((Float) o).floatValue();
values2[j] = values2[j] > 1 ? 1 : values2[j] < 0 ? 0 : values2[j];
j++;
}
}
Color c = null;
if (i == expressions.length) {
if (i == 1 && values[0] > 255) {
c = new Color(values[0]);
} else {
switch (values.length) {
case 1:
c = new Color(values[0]);
break;
case 3:
c = new Color(values[0], values[1], values[2]);
break;
case 4:
c = new Color(values[0], values[1], values[2], values[3]);
break;
default:
break;
}
}
} else if (j == expressions.length) {
switch (values2.length) {
case 3:
c = new Color(values2[0], values2[1], values2[2]);
break;
case 4:
c = new Color(values2[0], values2[1], values2[2], values2[3]);
break;
default:
break;
}
}
if (c != null) {
return new ColorPreviewComponent(c);
}
}
}
}
}
}
if (ColorChooserIntentionAction.isInsideDecodeOrGetColorMethod(element)) {
final String color = StringUtil.unquoteString(element.getText());
try {
return new ColorPreviewComponent(Color.decode(color));
} catch (NumberFormatException ignore) {
}
}
if (PlatformPatterns.psiElement(PsiIdentifier.class)
.withParent(PlatformPatterns.psiElement(PsiReferenceExpression.class))
.accepts(element)) {
final PsiReference reference = element.getParent().getReference();
if (reference != null) {
final PsiElement psiElement = reference.resolve();
if (psiElement instanceof PsiField) {
if ("java.awt.Color"
.equals(((PsiField) psiElement).getContainingClass().getQualifiedName())) {
final String colorName =
((PsiField) psiElement).getName().toLowerCase().replace("_", "");
final String hex = ColorSampleLookupValue.getHexCodeForColorName(colorName);
return new ColorPreviewComponent(Color.decode("0x" + hex.substring(1)));
}
}
}
}
if (PlatformPatterns.psiElement()
.withParent(PlatformPatterns.psiElement(PsiLiteralExpression.class))
.accepts(element)) {
final PsiLiteralExpression psiLiteralExpression = (PsiLiteralExpression) element.getParent();
if (psiLiteralExpression != null) {
return ImagePreviewComponent.getPreviewComponent(psiLiteralExpression);
}
}
return null;
}