fixed PY-6907 Paste leads to syntactically incorrect code in case of dedent in copied text

python/src/com/jetbrains/python/editor/PythonCopyPasteProcessor.java

@@ -42,6 +42,23 @@ public class PythonCopyPasteProcessor implements CopyPastePreProcessor {
     final Document document = editor.getDocument();
     String newText = text;
 
+    //a lot of different indents inside selected
+    final String[] split = StringUtil.trimTrailing(text).split("\n");
+    int firstIndent = 0;
+    int currentIndent;
+    for (String s : split) {
+      currentIndent = s.length() - s.trim().length();
+      if (split[0].equals(s) ) {
+        firstIndent = currentIndent;
+      }
+      if (!StringUtil.isEmptyOrSpaces(s) && firstIndent > currentIndent) {
+        if (caretModel.getLogicalPosition().column > 0)
+          return StringUtil.trimLeading(text);
+        else
+          return text;
+      }
+    }
+
     if (file instanceof PyFile && (StringUtil.startsWithWhitespace(text) || StringUtil.endsWithLineBreak(text) ||
                                    StringUtil.splitByLines(text).length > 1)) {
       if (text.endsWith("\n")) text = text.substring(0, text.length() - 1);

python/testData/copyPaste/multiLine/IndentIfElse.after.py

@@ -0,0 +1,6 @@
+def f():
+    if True:
+        a = 1
+        print(0.1)
+    else:
+        print(0.1)

python/testData/copyPaste/multiLine/IndentIfElse.dst.py

@@ -0,0 +1,4 @@
+def f():
+    if True:
+        a = 1
+        <caret>

python/testData/copyPaste/multiLine/IndentIfElse.src.py

@@ -0,0 +1,6 @@
+def f():
+    if False:
+<selection>        print(0.1)
+    else:
+        print(0.1)
+</selection>

python/testSrc/com/jetbrains/python/PyCopyPasteTest.java

@@ -167,6 +167,10 @@ public class PyCopyPasteTest extends PyTestCase {
     doTestMultiLine();
   }
 
+  public void testIndentIfElse() {    //PY-6907
+    doTestMultiLine();
+  }
+
   public void testIndentOnTopLevel() {    //PY-6928
     doTestSingleLine();
   }