Fix checkmark in line spacing menu

CHANGELOG.md

@@ -59,6 +59,7 @@ Change Log
 - Fix an issue that Unicode character insertion was occasionally failed.
 - Fix an issue that syntax highlights were removed after perform Unhighlight.
 - Fix timing to display sheets on file open.
+- Fix an issue that checkmark in line height menu was not displayed.
 - Fix some missing localizations in simplified Chinese. (Thanks to Wei Wang!)
 - Fix an issue that an alert message was not localized.
 - And other trivial UI fixes and enhancements.

CotEditor/Sources/CETextView.m

@@ -951,7 +951,8 @@ static NSPoint kTextContainerOrigin;
         // （カラーコード編集メニューは常に有効）
         
     } else if ([menuItem action] == @selector(changeLineHeight:)) {
-        [menuItem setState:(([self lineSpacing] == (CGFloat)[[menuItem title] doubleValue] - 1.0) ? NSOnState : NSOffState)];
+        CGFloat lineSpacing = [[menuItem title] doubleValue] - 1.0;
+        [menuItem setState:(CEIsEqualCGFloats([self lineSpacing], lineSpacing, 3) ? NSOnState : NSOffState)];
     } else if ([menuItem action] == @selector(changeTabWidth:)) {
         [menuItem setState:(([self tabWidth] == [menuItem tag]) ? NSOnState : NSOffState)];
     } else if ([menuItem action] == @selector(showSelectionInfo:)) {

CotEditor/Sources/constants.h

@@ -70,6 +70,11 @@ typedef NS_ENUM(UInt32, CESystemSoundID) {
 };
 
 
+// convenient functions
+/// compare CGFloats
+BOOL CEIsEqualCGFloats(CGFloat float1, CGFloat float2, NSInteger accuracy);
+
+
 
 #pragma mark Notifications
 

CotEditor/Sources/constants.m

@@ -70,6 +70,15 @@ NSString *const kHelpAnchors[] = {
     @"pref_integration"
 };
 
+
+// convenient functions
+/// compare CGFloats
+BOOL CEIsEqualCGFloats(CGFloat float1, CGFloat float2, NSInteger accuracy) {
+    return (fabs(float1 - float2) < pow(10, -accuracy));
+}
+
+
+
 #pragma mark Notifications
 
 // ------------------------------------------------------