Alternate NTP: Move bookmark bar to bottom

chrome/browser/ui/cocoa/browser_window_controller_private.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/browser_window_controller_private.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #import "base/memory/scoped_nsobject.h"
@@ skipping 14 matching lines @@
 #import "chrome/browser/ui/cocoa/fullscreen_window.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
 #import "chrome/browser/ui/cocoa/nsview_additions.h"
 #import "chrome/browser/ui/cocoa/presentation_mode_controller.h"
 #import "chrome/browser/ui/cocoa/status_bubble_mac.h"
 #import "chrome/browser/ui/cocoa/tab_contents/previewable_contents_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_view.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_controller.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_controller.h"
+#include "chrome/browser/ui/search/search_ui.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #import "ui/base/cocoa/focus_tracker.h"
 #include "ui/base/ui_base_types.h"
 
 using content::RenderWidgetHostView;
@@ skipping 160 matching lines @@
   DCHECK_GE(maxY, minY);
   DCHECK_LE(maxY, NSMaxY(contentBounds) + yOffset);
 
   // Place the toolbar at the top of the reserved area.
   maxY = [self layoutToolbarAtMinX:minX maxY:maxY width:width];
 
   // If we're not displaying the bookmark bar below the infobar, then it goes
   // immediately below the toolbar.
   BOOL placeBookmarkBarBelowInfoBar = [self placeBookmarkBarBelowInfoBar];
   if (!placeBookmarkBarBelowInfoBar)
-    maxY = [self layoutBookmarkBarAtMinX:minX maxY:maxY width:width];
+    maxY = [self layoutTopBookmarkBarAtMinX:minX maxY:maxY width:width];
 
   // The floating bar backing view doesn't actually add any height.
   NSRect floatingBarBackingRect =
       NSMakeRect(minX, maxY, width, floatingBarHeight);
   [self layoutFloatingBarBackingView:floatingBarBackingRect
                     presentationMode:inPresentationMode];
 
   // Place the find bar immediately below the toolbar/attached bookmark bar. In
   // presentation mode, it hangs off the top of the screen when the bar is
   // hidden.  The find bar is unaffected by the side tab positioning.
   [findBarCocoaController_ positionFindBarViewAtMaxY:maxY maxWidth:width];
   [fullscreenExitBubbleController_ positionInWindowAtTop:maxY width:width];
 
   // If in presentation mode, reset |maxY| to top of screen, so that the
   // floating bar slides over the things which appear to be in the content area.
   if (inPresentationMode)
     maxY = NSMaxY(contentBounds);
 
   // Also place the infobar container immediate below the toolbar, except in
   // presentation mode in which case it's at the top of the visual content area.
   maxY = [self layoutInfoBarAtMinX:minX maxY:maxY width:width];
 
-  // If the bookmark bar is detached, place it next in the visual content area.
-  if (placeBookmarkBarBelowInfoBar)
-    maxY = [self layoutBookmarkBarAtMinX:minX maxY:maxY width:width];
-
   // Place the download shelf, if any, at the bottom of the view.
   minY = [self layoutDownloadShelfAtMinX:minX minY:minY width:width];
 
+  // Place the bookmark bar.
+  if (placeBookmarkBarBelowInfoBar) {
+    if ([bookmarkBarController_ shouldShowAtBottomWhenDetached]) {
+      [self layoutBottomBookmarkBarInContentFrame:
+          NSMakeRect(minX, minY, width, maxY - minY)];
+    } else {
+      maxY = [self layoutTopBookmarkBarAtMinX:minX maxY:maxY width:width];
+    }
+  }
+
   // Finally, the content area takes up all of the remaining space.
   NSRect contentAreaRect = NSMakeRect(minX, minY, width, maxY - minY);
   [self layoutTabContentArea:contentAreaRect];
 
   // Normally, we don't need to tell the toolbar whether or not to show the
   // divider, but things break down during animation.
   [toolbarController_
       setDividerOpacity:[bookmarkBarController_ toolbarDividerOpacity]];
 }
 
@@ skipping 108 matching lines @@
 
 - (BOOL)placeBookmarkBarBelowInfoBar {
   // If we are currently displaying the NTP detached bookmark bar or animating
   // to/from it (from/to anything else), we display the bookmark bar below the
   // infobar.
   return [bookmarkBarController_ isInState:bookmarks::kDetachedState] ||
       [bookmarkBarController_ isAnimatingToState:bookmarks::kDetachedState] ||
       [bookmarkBarController_ isAnimatingFromState:bookmarks::kDetachedState];
 }
 
-- (CGFloat)layoutBookmarkBarAtMinX:(CGFloat)minX
-                              maxY:(CGFloat)maxY
-                             width:(CGFloat)width {
+- (CGFloat)layoutTopBookmarkBarAtMinX:(CGFloat)minX
+                                 maxY:(CGFloat)maxY
+                               width:(CGFloat)width {
+  [bookmarkBarController_ updateHiddenState];
+
   NSView* bookmarkBarView = [bookmarkBarController_ view];
-  NSRect bookmarkBarFrame = [bookmarkBarView frame];
-  BOOL oldHidden = [bookmarkBarView isHidden];
-  BOOL newHidden = ![self isBookmarkBarVisible];
-  if (oldHidden != newHidden)
-    [bookmarkBarView setHidden:newHidden];
-  bookmarkBarFrame.origin.x = minX;
-  bookmarkBarFrame.origin.y = maxY - NSHeight(bookmarkBarFrame);
-  bookmarkBarFrame.size.width = width;
-  [bookmarkBarView setFrame:bookmarkBarFrame];
-  maxY -= NSHeight(bookmarkBarFrame);
+  NSRect frame = [bookmarkBarView frame];
+  frame.origin.x = minX;
+  frame.origin.y = maxY - NSHeight(frame);
+  frame.size.width = width;
+  [bookmarkBarView setFrame:frame];
+  maxY -= NSHeight(frame);
+
+  // Pin the bookmark bar to the top of the window and make the width flexible.
+  [bookmarkBarView setAutoresizingMask:NSViewWidthSizable | NSViewMinYMargin];
 
   // TODO(viettrungluu): Does this really belong here? Calling it shouldn't be
   // necessary in the non-NTP case.
   [bookmarkBarController_ layoutSubviews];
 
   return maxY;
 }
 
+- (void)layoutBottomBookmarkBarInContentFrame:(NSRect)contentFrame {
+  [bookmarkBarController_ updateHiddenState];
+
+  NSView* bookmarkBarView = [bookmarkBarController_ view];
+  NSRect frame;
+  frame.size.width = NSWidth(contentFrame) -
+      chrome::search::kHorizontalPaddingForBottomBookmarkBar * 2;
+  frame.size.width = std::min(frame.size.width,
+      static_cast<CGFloat>(chrome::search::kMaxWidthForBottomBookmarkBar));
+  frame.size.height = NSHeight([bookmarkBarView frame]);
+  frame.origin.x = NSMinX(contentFrame) +
+      roundf((NSWidth(contentFrame)- frame.size.width) / 2.0);
+  frame.origin.y = NSMinY(contentFrame);
+  [bookmarkBarView setFrame:frame];
+
+  // Disable auto-resizing.
+  [bookmarkBarView setAutoresizingMask:0];
+
+  // TODO(viettrungluu): Does this really belong here? Calling it shouldn't be
+  // necessary in the non-NTP case.
+  [bookmarkBarController_ layoutSubviews];
+}
+
 - (void)layoutFloatingBarBackingView:(NSRect)frame
                     presentationMode:(BOOL)presentationMode {
   // Only display when in presentation mode.
   if (presentationMode) {
     // For certain window types such as app windows (e.g., the dev tools
     // window), there's no actual overlay. (Displaying one would result in an
     // overly sliding in only under the menu, which gives an ugly effect.)
     if (floatingBarBackingView_.get()) {
       BOOL aboveBookmarkBar = [self placeBookmarkBarBelowInfoBar];
 
@@ skipping 456 matching lines @@
 - (void)disableBarVisibilityUpdates {
   // Early escape if there's nothing to do.
   if (!barVisibilityUpdatesEnabled_)
     return;
 
   barVisibilityUpdatesEnabled_ = NO;
   [presentationModeController_ cancelAnimationAndTimers];
 }
 
 @end  // @implementation BrowserWindowController(Private)