[Mac] First part of Omnibox decoration refactor. Enable ev bubble.

chrome/browser/cocoa/location_bar/location_icon_decoration.mm

+// Copyright (c) 2010 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.
+
+#include <cmath>
+
+#import "chrome/browser/cocoa/location_bar/location_icon_decoration.h"
+
+#include "base/sys_string_conversions.h"
+#import "chrome/browser/cocoa/image_utils.h"
+#import "chrome/browser/cocoa/location_bar/location_bar_view_mac.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+#import "third_party/mozilla/NSPasteboard+Utils.h"
+
+LocationIconDecoration::LocationIconDecoration(LocationBarViewMac* owner)
+    : owner_(owner) {
+}
+LocationIconDecoration::~LocationIconDecoration() {
+}
+
+NSImage* LocationIconDecoration::GetImage() {
+  return image_;
+}
+
+void LocationIconDecoration::SetImage(NSImage* image) {
+  image_.reset([image retain]);
+}
+
+CGFloat LocationIconDecoration::GetWidthForSpace(CGFloat width) {
+  NSImage* image = GetImage();
+  if (image) {
+    const CGFloat image_width = [image size].width;
+    if (image_width >= width)
+      return image_width;
+  }
+  return kOmittedWidth;
+}
+
+void LocationIconDecoration::DrawInFrame(NSRect frame, NSView* control_view) {
+  NSImage* image = GetImage();
+  const CGFloat delta_height = NSHeight(frame) - [image size].height;
+  const CGFloat y_inset = std::floor(delta_height / 2.0);
+  [image drawInRect:NSInsetRect(frame, 0.0, y_inset)
+           fromRect:NSZeroRect  // Entire image
+          operation:NSCompositeSourceOver
+           fraction:1.0
+       neverFlipped:YES];
+}
+
+bool LocationIconDecoration::IsDraggable() {
+  // Without a tab it will be impossible to get the information needed
+  // to perform a drag.
+  if (!owner_->GetTabContents())
+    return false;
+
+  // Do not drag if the user has been editing the location bar, or the
+  // location bar is at the NTP.
+  if (owner_->location_entry()->IsEditingOrEmpty())
+    return false;
+
+  return true;
+}
+
+NSPasteboard* LocationIconDecoration::GetDragPasteboard() {
+  TabContents* tab = owner_->GetTabContents();
+  DCHECK(tab);  // See |IsDraggable()|.
+
+  NSString* url = base::SysUTF8ToNSString(tab->GetURL().spec());
+  NSString* title = base::SysUTF16ToNSString(tab->GetTitle());
+
+  NSPasteboard* pboard = [NSPasteboard pasteboardWithName:NSDragPboard];
+  [pboard declareURLPasteboardWithAdditionalTypes:[NSArray array]
+                                            owner:nil];
+  [pboard setDataForURL:url title:title];
+  return pboard;
+}
+
+bool LocationIconDecoration::OnMousePressed(NSRect frame) {
+  // Do not show page info if the user has been editing the location
+  // bar, or the location bar is at the NTP.
+  if (owner_->location_entry()->IsEditingOrEmpty())
+    return true;
+
+  TabContents* tab = owner_->GetTabContents();
+  NavigationEntry* nav_entry = tab->controller().GetActiveEntry();
+  if (!nav_entry) {
+    NOTREACHED();
+    return true;
+  }
+  tab->ShowPageInfo(nav_entry->url(), nav_entry->ssl(), true);
+  return true;
+}