[ADD] add caution symbol to be used in tab bar and temporary activation code for it.

Author: monkeydom

Artwork-Sources/Symbols.afdesign

@@ -793,7 +793,23 @@ - (void)presentAlert:(NSAlert *)alert completionHandler:(void (^)(NSModalRespons
                         }];
 
     NSWindow *window = orderedWindows[index];
-
+    
+    NSArray *windowControllers = self.windowControllers;
+    
+    // Temporary code to test style of alert icon
+    for (PlainTextWindowController *controller in windowControllers) {
+        controller.showsCautionSymbolInTab = YES;
+    }
+    
+    completionHandler = ^(NSModalResponse returnCode) {
+        for (PlainTextWindowController *controller in windowControllers) {
+            controller.showsCautionSymbolInTab = NO;
+        }
+        if (completionHandler) {
+            completionHandler(returnCode);
+        }
+    };
+    
     [window makeKeyAndOrderFront:self];
     [alert beginSheetModalForWindow:window completionHandler:completionHandler];
 }

SubEthaEdit-Mac/Source/PlainTextDocument.m

@@ -43,8 +43,9 @@
 - (void)setSizeByColumns:(NSInteger)aColumns rows:(NSInteger)aRows;
 - (void)setShowsBottomStatusBar:(BOOL)aFlag;
 
-- (BOOL)showsGutter;
-- (void)setShowsGutter:(BOOL)aFlag;
+@property (nonatomic) BOOL showsGutter;
+@property (nonatomic) BOOL showsCautionSymbolInTab;
+
 - (IBAction)toggleLineNumbers:(id)aSender;
 
 - (void)setDocumentDialog:(NSViewController<SEEDocumentDialogViewController>*)aDocumentDialog;

SubEthaEdit-Mac/Source/PlainTextWindowController.h

@@ -127,15 +127,15 @@ - (PlainTextWindowControllerTabContext *)windowControllerTabContextForDocument:(
 }
 
 - (PlainTextWindowControllerTabContext *)selectedTabContext {
-  //
 	return I_tabContext;
 }
 
 - (void)document:(PlainTextDocument *)document isReceivingContent:(BOOL)flag;
 {
-    if (![[self documents] containsObject:document])
+    if (![[self documents] containsObject:document]) {
         return;
-        
+    }
+    
     PlainTextWindowControllerTabContext *tabContext = [self windowControllerTabContextForDocument:document];
     if (tabContext) {
 
@@ -337,6 +337,21 @@ - (void)selectRangeInBackground:(NSRange)aRange {
 
 #pragma mark -
 
+- (BOOL)showsCautionSymbolInTab {
+    return !!(self.window.tab.accessoryView);
+}
+
+- (void)setShowsCautionSymbolInTab:(BOOL)showsCautionSymbolInTab {
+    NSWindowTab *tab = self.window.tab;
+    
+   tab.accessoryView = showsCautionSymbolInTab ? ({
+        NSImage *image = [NSImage imageNamed:@"CautionSymbol"];
+        image.size = NSMakeSize(18,18);
+        NSImageView *view = [NSImageView imageViewWithImage:image];
+        view;
+    }) : nil;
+}
+
 - (BOOL)showsBottomStatusBar {
 	PlainTextWindowControllerTabContext *tabContext = self.selectedTabContext;
     return [[tabContext.plainTextEditors lastObject] showsBottomStatusBar];
@@ -378,7 +393,6 @@ - (IBAction)jumpToPreviousSymbol:(id)aSender {
     [[self activePlainTextEditor] jumpToPreviousSymbol:aSender];
 }
 
-
 - (IBAction)jumpToNextChange:(id)aSender {
     [[self activePlainTextEditor] jumpToNextChange:aSender];
 }

SubEthaEdit-Mac/Source/PlainTextWindowController.m

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "idiom" : "mac",
+      "filename" : "CautionSymbol.pdf",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  },
+  "properties" : {
+    "template-rendering-intent" : "template",
+    "preserves-vector-representation" : true
+  }
+}