[rAC, OSX] Use a bubble for tooltips.

chrome/browser/ui/cocoa/autofill/autofill_tooltip_controller.mm

+// Copyright (c) 2013 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/autofill/autofill_tooltip_controller.h"
+
+#include "base/mac/foundation_util.h"
+#import "chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h"
+#import "ui/base/cocoa/hover_image_button.h"
+
+// Delay time before tooltip shows/hides.
+const NSTimeInterval kTooltipDelay = 0.1;
+
+// How far to inset tooltip contents.
+CGFloat kTooltipInset = 10;
+
+#pragma mark AutofillTooltip
+
+// The actual tooltip control - based on HoverButton, which comes with free
+// hover handling.
+@interface AutofillTooltip : HoverButton {
+ @private
+  id<AutofillTooltipDelegate> tooltipDelegate_;
+}
+
+@property(assign, nonatomic) id<AutofillTooltipDelegate> tooltipDelegate;
+
+@end
+
+
+@implementation AutofillTooltip
+
+@synthesize tooltipDelegate = tooltipDelegate_;
+
+- (void)drawRect:(NSRect)rect {
+ [[self image] drawInRect:rect
+                 fromRect:NSZeroRect
+                operation:NSCompositeSourceOver
+                 fraction:1.0
+           respectFlipped:YES
+                    hints:nil];
+}
+
+- (void)setHoverState:(HoverState)state {
+  HoverState oldHoverState = [self hoverState];
+  [super setHoverState:state];
+  if (state != oldHoverState) {
+    switch (state) {
+      case kHoverStateNone:
+        [tooltipDelegate_ didEndHover];
+        break;
+      case kHoverStateMouseOver:
+        [tooltipDelegate_ didBeginHover];
+        break;
+      case kHoverStateMouseDown:
+        break;
+    }
+  }
+}
+
+@end
+
+#pragma mark AutofillTooltipController
+
+@implementation AutofillTooltipController
+
+@synthesize message = message_;
+
+- (id)init {
+  if ((self = [super init])) {
+    view_.reset([[AutofillTooltip alloc] init]);
+    [self setView:view_];
+    [view_ setTooltipDelegate:self];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [[NSNotificationCenter defaultCenter]
+      removeObserver:self
+                name:NSWindowWillCloseNotification
+              object:[bubbleController_ window]];
+  [super dealloc];
+}
+
+- (void)setImage:(NSImage*)image {
+  [view_ setImage:image];
+  [view_ setFrameSize:[image size]];
+}
+
+- (void)didBeginHover {
+  [NSObject cancelPreviousPerformRequestsWithTarget:self];
+  // Start a timer to display the tooltip, unless it's already displayed.
+  if (!bubbleController_) {
+    [self performSelector:@selector(displayHover)
+               withObject:nil
+               afterDelay:kTooltipDelay];
+  }
+}
+
+- (void)tooltipWindowWillClose:(NSNotification*)notification {
+  bubbleController_ = nil;
+}
+
+- (void)displayHover {
+  [bubbleController_ close];
+  bubbleController_ =
+    [[AutofillBubbleController alloc]
+        initWithParentWindow:[[self view] window]
+                     message:[self message]
+                       inset:NSMakeSize(kTooltipInset, kTooltipInset)];
+
+  // Handle bubble self-deleting.
+  NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
+  [center addObserver:self
+             selector:@selector(tooltipWindowWillClose:)
+                 name:NSWindowWillCloseNotification
+               object:[bubbleController_ window]];
+
+  // Compute anchor point (in window coords - views might be flipped).
+  NSRect viewRect = [view_ convertRect:[view_ bounds] toView:nil];
+  NSPoint anchorPoint = NSMakePoint(NSMidX(viewRect), NSMinY(viewRect));
+  [bubbleController_ setAnchorPoint:
+      [[[self view] window] convertBaseToScreen:anchorPoint]];
+  [bubbleController_ showWindow:self];
+}
+
+- (void)hideHover {
+  [bubbleController_ close];
+}
+
+- (void)didEndHover {
+  [NSObject cancelPreviousPerformRequestsWithTarget:self];
+  // Start a timer to display the tooltip, unless it's already hidden.
+  if (bubbleController_) {
+    [self performSelector:@selector(hideHover)
+               withObject:nil
+               afterDelay:kTooltipDelay];
+  }
+}
+
+@end