Fix bug that could not handle a text which ends with close tag

Author: majecty

Assets/RichTextHelper/RichTextHelper.cs

@@ -40,8 +40,10 @@ public static int RichTextLength(this string text)
             var length = 0;
             while (m.IsConsumable())
             {
-                m.Consume();
-                length += 1;
+                if (m.Consume())
+                {
+                    length += 1;
+                }
             }
             return length;
         }
@@ -97,7 +99,9 @@ public bool IsConsumable()
             return consumedLength < originalText.Length;
         }
 
-        public void Consume()
+        // Return if real character is consumed
+        // If line's last part is closing tag, this function return false when consumed last closing tag.
+        public bool Consume()
         {
             Debug.Assert(IsConsumable());
             var peekedOriginChar = PeekNextOriginChar();
@@ -111,11 +115,20 @@ public void Consume()
                 {
                     ConsumeStartTag();
                 }
-                Consume();
+                if (IsConsumable())
+                {
+                    Consume();
+                    return true;
+                }
+                else
+                {
+                    return false;
+                }
             }
             else
             {
                 ConsumeRawChar();
+                return true;
             }
         }
 

Assets/test/RichTextHelperTest.cs

@@ -52,4 +52,15 @@ public void NestedTest()
         Assert.AreEqual(sampleTagText.RichTextSubString(3), "<color=#000>a<i>b<b>c</b></i></color>");
         Assert.AreEqual(sampleTagText.RichTextSubString(4), "<color=#000>a<i>b<b>c</b>d</i></color>");
     }
+
+    [Test]
+    public void CloseTagIsLast()
+    {
+        var sampleTagText = "<color=#000>a<i>b<b>c</b>d</i></color>";
+        Assert.AreEqual(sampleTagText.RichTextSubString(5), sampleTagText);
+        Assert.AreEqual(sampleTagText.RichTextSubString(1), "<color=#000>a</color>");
+        Assert.AreEqual(sampleTagText.RichTextSubString(2), "<color=#000>a<i>b</i></color>");
+        Assert.AreEqual(sampleTagText.RichTextSubString(3), "<color=#000>a<i>b<b>c</b></i></color>");
+        Assert.AreEqual(sampleTagText.RichTextSubString(4), "<color=#000>a<i>b<b>c</b>d</i></color>");
+    }
 }