Consider Java file with the following code (it can be any other language, we use Java as example):
public class Foo {
void foo(int x,
int y) {} // line 4
}
If IntelliJ is configured to use smart tabs, then line 4 will start with one tab (which is called indentation) and continued with 9 spaces (which are called alignment):
If IntelliJ is configured to use spaces, then line 4 will start with 13 spaces (first four spaces are indentation, and next nine spaces are alignment):
I have an object of type PsiWhiteSpace (which corresponds to both indentation and alignment in line 4). How can I retrieve information about indentation and alignment, that is number of chars in indentation and number of chars in alignment?
To be more specific here is testcase, which (hopefully) shows what I need:
import com.intellij.application.options.CodeStyle
import com.intellij.openapi.fileTypes.StdFileTypes
import com.intellij.psi.PsiDocumentManager
import com.intellij.psi.PsiWhiteSpace
import com.intellij.testFramework.fixtures.BasePlatformTestCase
class MyTest : BasePlatformTestCase() {
fun testExample() {
val content = """
public class Foo {
void foo(int x,
int y) {}
}
""".trimIndent()
val psiFile = myFixture.configureByText(StdFileTypes.JAVA, content)
val document = PsiDocumentManager.getInstance(project).getDocument(psiFile)!!
val startOffset = document.getLineStartOffset(3)
val psiWhiteSpace = psiFile.findElementAt(startOffset) as PsiWhiteSpace
// somehow use psiWhiteSpace to retrieve indent and alignment info:
// val numberCharsInIndent = ???
// val numberCharsInAlignment = ???
val useTabs = CodeStyle.getIndentOptions(psiFile).USE_TAB_CHARACTER
if (useTabs) {
assert(numberCharsInIndent == 1)
assert(numberCharsInAlignment == 9)
} else {
assert(numberCharsInIndent == 4)
assert(numberCharsInAlignment == 9)
}
}
}