Introduce ‘reusable’ property to OakHTMLOutputView

This defaults to YES but can be set to NO if an output view should not be re-used (even though no command is currently running).

Frameworks/HTMLOutput/src/HTMLOutput.h

@@ -8,6 +8,7 @@
 @property (nonatomic) NSUUID* commandIdentifier; // UUID from initial load request
 @property (nonatomic, getter = isRunningCommand, readonly) BOOL runningCommand;
 @property (nonatomic, getter = isVisible, readonly) BOOL visible;
+@property (nonatomic, getter = isReusable) BOOL reusable;
 
 // Read-only access to the webview is given to allow reading page title, etc.
 @property (nonatomic, readonly) WebView* webView;

Frameworks/HTMLOutput/src/OakHTMLOutputView.h

@@ -9,4 +9,5 @@ PUBLIC @interface OakHTMLOutputView : HOBrowserView
 @property (nonatomic, readonly) NSString* mainFrameTitle;
 @property (nonatomic) NSUUID* commandIdentifier; // UUID from initial load request
 @property (nonatomic, getter = isRunningCommand, readonly) BOOL runningCommand;
+@property (nonatomic, getter = isReusable) BOOL reusable;
 @end

Frameworks/HTMLOutput/src/OakHTMLOutputView.mm

@@ -24,6 +24,15 @@
 	return [NSSet setWithObjects:@"webView.mainFrameTitle", nil];
 }
 
+- (instancetype)initWithFrame:(NSRect)aRect
+{
+	if(self = [super initWithFrame:aRect])
+	{
+		_reusable = YES;
+	}
+	return self;
+}
+
 - (void)loadRequest:(NSURLRequest*)aRequest environment:(std::map<std::string, std::string> const&)anEnvironment autoScrolls:(BOOL)flag
 {
 	if(flag)