TextEditor: move convenience from texteditor to utils

Allows to use this header without texteditor dependency.

Change-Id: I706f42799c3ea42473a716fa9ef9f3cfbef6fdd4
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp

@@ -47,7 +47,6 @@
 #include <cpptools/cppworkingcopy.h>
 #include <cpptools/editordocumenthandle.h>
 
-#include <texteditor/convenience.h>
 #include <texteditor/displaysettings.h>
 #include <texteditor/fontsettings.h>
 #include <texteditor/texteditor.h>
@@ -56,6 +55,7 @@
 
 #include <cplusplus/CppDocument.h>
 
+#include <utils/textutils.h>
 #include <utils/qtcassert.h>
 #include <utils/runextensions.h>
 
@@ -253,10 +253,8 @@ void ClangEditorDocumentProcessor::updateHighlighting(
 static int currentLine(const TextEditor::AssistInterface &assistInterface)
 {
     int line, column;
-    TextEditor::Convenience::convertPosition(assistInterface.textDocument(),
-                                             assistInterface.position(),
-                                             &line,
-                                             &column);
+    ::Utils::Text::convertPosition(assistInterface.textDocument(), assistInterface.position(),
+                                   &line, &column);
     return line;
 }
 
@@ -322,10 +320,10 @@ static QFuture<CppTools::CursorInfo> defaultCursorInfoFuture()
 
 static bool convertPosition(const QTextCursor &textCursor, int *line, int *column)
 {
-    const bool converted = TextEditor::Convenience::convertPosition(textCursor.document(),
-                                                                    textCursor.position(),
-                                                                    line,
-                                                                    column);
+    const bool converted = ::Utils::Text::convertPosition(textCursor.document(),
+                                                          textCursor.position(),
+                                                          line,
+                                                          column);
     QTC_CHECK(converted);
     return converted;
 }