[Mac] Hover/Pressed background for the Omnibox decorations

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_logging.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/themes/theme_service.h"
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h"
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_decoration.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #include "chrome/grit/theme_resources.h"
 #import "extensions/common/feature_switch.h"
 #import "third_party/mozilla/NSPasteboard+Utils.h"
 #import "ui/base/cocoa/appkit_utils.h"
+#import "ui/base/cocoa/tracking_area.h"
 #import "ui/base/cocoa/nsview_additions.h"
 #include "ui/base/cocoa/scoped_cg_context_smooth_fonts.h"
 #include "ui/base/material_design/material_design_controller.h"
 
 using extensions::FeatureSwitch;
 
 namespace {
 
 // Matches the clipping radius of |GradientButtonCell|.
 const CGFloat kCornerRadius = 3.0;
@@ skipping 144 matching lines @@
 }
 
 - (BOOL)shouldDrawBezel {
   return YES;
 }
 
 - (CGFloat)lineHeight {
   return 17;
 }
 
+- (void)clearTrackingArea {
+  for (auto& decoration : mouseTrackingDecorations_)
+    decoration->RemoveTrackingArea();
+
+  mouseTrackingDecorations_.clear();
+}
+
 - (void)clearDecorations {
   leftDecorations_.clear();
   rightDecorations_.clear();
+  [self clearTrackingArea];
 }
 
 - (void)addLeftDecoration:(LocationBarDecoration*)decoration {
   leftDecorations_.push_back(decoration);
 }
 
 - (void)addRightDecoration:(LocationBarDecoration*)decoration {
   rightDecorations_.push_back(decoration);
 }
 
@@ skipping 253 matching lines @@
   // If not, discard focus event.
   base::scoped_nsobject<NSEvent> focusEvent(focusEvent_.release());
   if (![theEvent isEqual:focusEvent])
     focusEvent.reset();
 
   LocationBarDecoration* decoration =
       [self decorationForEvent:theEvent inRect:cellFrame ofView:controlView];
   if (!decoration || !decoration->AcceptsMousePress())
     return NO;
 
+  decoration->OnMouseDown();
+
   NSRect decorationRect =
       [self frameForDecoration:decoration inFrame:cellFrame];
 
   // If the decoration is draggable, then initiate a drag if the user
   // drags or holds the mouse down for awhile.
   if (decoration->IsDraggable()) {
     NSDate* timeout =
         [NSDate dateWithTimeIntervalSinceNow:kLocationIconDragTimeout];
     NSEvent* event = [NSApp nextEventMatchingMask:(NSLeftMouseDraggedMask |
                                                    NSLeftMouseUpMask)
@@ skipping 39 matching lines @@
     DCHECK_EQ([event type], NSLeftMouseUp);
   }
 
   const NSPoint mouseLocation = [theEvent locationInWindow];
   const NSPoint point = [controlView convertPoint:mouseLocation fromView:nil];
   return decoration->OnMousePressed(
       decorationRect, NSMakePoint(point.x - decorationRect.origin.x,
                                   point.y - decorationRect.origin.y));
 }
 
+- (void)mouseUp:(NSEvent*)theEvent
+         inRect:(NSRect)cellFrame
+         ofView:(AutocompleteTextField*)controlView {
+  LocationBarDecoration* decoration =
+      [self decorationForEvent:theEvent inRect:cellFrame ofView:controlView];
+  if (decoration)
+    decoration->OnMouseUp();
+}
+
 // Returns the file path for file |name| if saved at NSURL |base|.
 static NSString* PathWithBaseURLAndName(NSURL* base, NSString* name) {
   NSString* filteredName =
       [name stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
   return [[NSURL URLWithString:filteredName relativeToURL:base] path];
 }
 
 // Returns if there is already a file |name| at dir NSURL |base|.
 static BOOL FileAlreadyExists(NSURL* base, NSString* name) {
   NSString* path = PathWithBaseURLAndName(base, name);
@@ skipping 86 matching lines @@
                 ofItemAtPath:[outputURL path]
                        error:nil];
 
   return [NSArray arrayWithObject:nameWithExtensionStr];
 }
 
 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal {
   return NSDragOperationCopy;
 }
 
-- (void)updateToolTipsInRect:(NSRect)cellFrame
-                      ofView:(AutocompleteTextField*)controlView {
+- (void)updateMouseTrackingAndToolTipsInRect:(NSRect)cellFrame
+                                      ofView:
+                                          (AutocompleteTextField*)controlView {
   std::vector<LocationBarDecoration*> decorations;
   std::vector<NSRect> decorationFrames;
   NSRect textFrame;
   CalculatePositionsInFrame(cellFrame, leftDecorations_, rightDecorations_,
                             &decorations, &decorationFrames, &textFrame);
+  [self clearTrackingArea];
 
   for (size_t i = 0; i < decorations.size(); ++i) {
+    CrTrackingArea* trackingArea =
+        decorations[i]->SetupTrackingArea(decorationFrames[i], controlView);
+    if (trackingArea)
+      mouseTrackingDecorations_.push_back(decorations[i]);
+
     NSString* tooltip = decorations[i]->GetToolTip();
     if ([tooltip length] > 0)
       [controlView addToolTip:tooltip forRect:decorationFrames[i]];
   }
 }
 
 - (BOOL)hideFocusState {
   return hideFocusState_;
 }
 
@@ skipping 14 matching lines @@
 
 - (void)handleFocusEvent:(NSEvent*)event
                   ofView:(AutocompleteTextField*)controlView {
   if ([controlView observer]) {
     const bool controlDown = ([event modifierFlags] & NSControlKeyMask) != 0;
     [controlView observer]->OnSetFocus(controlDown);
   }
 }
 
 @end
+
+@implementation AutocompleteTextFieldCell (TestingAPI)
+
+- (const std::vector<LocationBarDecoration*>&)mouseTrackingDecorations {
+  return mouseTrackingDecorations_;
+}
+
+@end