Hide "Restore to Defaults" button if needless

CHANGELOG.md

@@ -10,6 +10,7 @@ Change Log
 - Change not to highlight occurrences of the selection when there are more than 100.
 - Update validation pane in the syntax style editor:
     - Now, validation is performed automatically when the pane switched to “Valitation”.
+- [trivial] Remove “Restore to Defaults” button in the syntax style editor if the style has no defaults.
 
 
 ### Fixes

CotEditor/Base.lproj/SyntaxEditView.storyboard

@@ -262,7 +262,7 @@
                                 <constraints>
                                     <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="140" id="i12-7i-sAj"/>
                                 </constraints>
-                                <buttonCell key="cell" type="push" title="Restore Defaults" bezelStyle="rounded" alignment="center" enabled="NO" borderStyle="border" inset="2" id="1020">
+                                <buttonCell key="cell" type="push" title="Restore Defaults" bezelStyle="rounded" alignment="center" borderStyle="border" inset="2" id="1020">
                                     <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                     <font key="font" metaFont="system"/>
                                     <connections>
@@ -271,6 +271,11 @@
                                 </buttonCell>
                                 <connections>
                                     <action selector="setToFactoryDefaults:" target="8Mx-zQ-ItP" id="b5I-xl-dUQ"/>
+                                    <binding destination="8Mx-zQ-ItP" name="hidden" keyPath="isBundledStyle" id="qs6-2z-iwf">
+                                        <dictionary key="options">
+                                            <string key="NSValueTransformerName">NSNegateBoolean</string>
+                                        </dictionary>
+                                    </binding>
                                 </connections>
                             </button>
                             <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="dje-ga-BFL">

CotEditor/Sources/SyntaxEditViewController.swift

@@ -70,7 +70,7 @@ final class SyntaxEditViewController: NSViewController, NSTextFieldDelegate, NST
     @objc private dynamic var message: String?
     @objc private dynamic var isStyleNameValid = true
     @objc private dynamic var isRestoreble = false
-    private var isBundledStyle = false
+    @objc private dynamic var isBundledStyle = false
     
     private var tabViewController: NSTabViewController?
     
@@ -170,7 +170,6 @@ final class SyntaxEditViewController: NSViewController, NSTextFieldDelegate, NST
             else { return }
 
         self.style.setDictionary(style)
-        self.isRestoreble = false
         
         // update validation result if displayed
         let tabViewController = self.tabViewController!