From ce820a5dd25a8407ad581c217a011d75a02753f8 Mon Sep 17 00:00:00 2001
From: Vadim Lopatin <coolreader.org@gmail.com>
Date: Tue, 24 Feb 2015 14:13:41 +0300
Subject: [PATCH] support of smart indents

---
 src/dlangui/core/editable.d | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/dlangui/core/editable.d b/src/dlangui/core/editable.d
index 7a7da7ae..f0fa1002 100644
--- a/src/dlangui/core/editable.d
+++ b/src/dlangui/core/editable.d
@@ -857,6 +857,31 @@ class EditableContent {
         return TextRange(TextPosition(lineIndex, 0), lineIndex < _lines.length - 1 ? lineBegin(lineIndex + 1) : lineEnd(lineIndex));
 	}
 
+    /// find nearest next tab position
+    int nextTab(int pos) {
+        return (pos + tabSize) / tabSize * tabSize;
+    }
+
+    /// returns spaces/tabs for filling from the beginning of line to specified position
+    dstring fillSpace(int pos) {
+        dchar[] buf;
+        int x = 0;
+        while (x + tabSize <= pos) {
+            if (useSpacesForTabs) {
+                for (int i = 0; i < tabSize; i++)
+                    buf ~= ' ';
+            } else {
+                buf ~= '\t';
+            }
+            x += tabSize;
+        }
+        while (x < pos) {
+            buf ~= ' ';
+            x++;
+        }
+        return cast(dstring)buf;
+    }
+
     /// measures line non-space start and end positions
     TextLineMeasure measureLine(int lineIndex) {
         TextLineMeasure res;