TextEditor: Remove itexteditor.{h,cpp}

Move the remaining contents to more appropriate places.

Change-Id: I55eed5c572bd33dafe2187523d9aa381c211fdd6
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/texteditor/basetexteditor.h

@@ -31,10 +31,12 @@
 #define BASETEXTEDITOR_H
 
 #include "basetextdocument.h"
-#include "itexteditor.h"
 #include "codeassist/assistenums.h"
+#include "texteditor_global.h"
 
+#include <coreplugin/textdocument.h>
 #include <coreplugin/editormanager/editormanager.h>
+#include <coreplugin/editormanager/ieditor.h>
 #include <coreplugin/find/ifindsupport.h>
 
 #include <QPlainTextEdit>
@@ -43,9 +45,17 @@
 QT_BEGIN_NAMESPACE
 class QToolBar;
 class QPrinter;
+class QMenu;
+class QPainter;
+class QPoint;
+class QRect;
+class QTextBlock;
 QT_END_NAMESPACE
 
-namespace Utils { class LineColumnLabel; }
+namespace Utils {
+class CommentDefinition;
+class LineColumnLabel;
+}
 
 namespace TextEditor {
 
@@ -77,6 +87,24 @@ class Indenter;
 class AutoCompleter;
 class ExtraEncodingSettings;
 
+class TEXTEDITOR_EXPORT BlockRange
+{
+public:
+    BlockRange() : _first(0), _last(-1) {}
+    BlockRange(int firstPosition, int lastPosition)
+      : _first(firstPosition), _last(lastPosition)
+    {}
+
+    inline bool isNull() const { return _last < _first; }
+
+    int first() const { return _first; }
+    int last() const { return _last; }
+
+private:
+    int _first;
+    int _last;
+};
+
 class TEXTEDITOR_EXPORT BaseTextEditor : public Core::IEditor
 {
     Q_OBJECT