alternate ntp: implement right-aligned search token

chrome/browser/ui/views/location_bar/location_bar_layout.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_LAYOUT_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_LAYOUT_H_
 
 #include "base/memory/scoped_vector.h"
 
 namespace gfx {
@@ skipping 37 matching lines @@
                      bool auto_collapse,
                      double max_fraction,
                      int edge_item_padding,
                      int item_padding,
                      int builtin_padding,
                      views::View* view);
 
   // Add a non-resizable decoration with standard padding.
   void AddDecoration(int height, int builtin_padding, views::View* view);
 
+  // Add a separator, specifying:
+  // - The |y| position inside its parent;
+  // - The |height| in pixel;

[Peter Kasting, 2013/01/17 04:14:22]

Nit: pixels.  Though, it's weird to note that only here when all these first
three arguments are in pixels.

Frankly, I'd rename |padding| to |padding_from_previous_item| and |view| to
|separator|, and drop the comment entirely as at that point the function is
self-documenting.

[kuan, 2013/01/17 17:57:43]

Done.

+  // - |padding|, the padding between the previous item and this separator;
+  // - The |view| corresponding to this separator, a weak pointer.
+  void AddSeparator(int y, int height, int padding, views::View* view);
+
   // First pass of decoration layout process. Pass the full width of the
   // location bar in |entry_width|. This pass will adjust it to account for
   // non-collapsible and non-resizable decorations.
   void LayoutPass1(int* entry_width);
 
   // Second pass of decoration layout process. Pass the |entry_width| computed
   // by the first pass. This pass will adjust it to account for resizable
   // decorations.
   void LayoutPass2(int* entry_width);
 
   // Third and final pass of decoration layout process. Pass the |bounds|
   // corresponding to the entire space available in the location bar. This pass
   // will update it as decorations are laid out. |available_width| measures the
   // empty space within the location bar, taking the decorations and text into
   // account. |decorations| must always be ordered from the edge of the location
   // bar towards the middle.
   void LayoutPass3(gfx::Rect* bounds, int* available_width);
 
+  // Sets the padding between edit and the decoration beside it.
+  // This value must not be modified after LayoutPass1 has been called.
+  void set_item_edit_padding(int item_edit_padding) {
+    item_edit_padding_ = item_edit_padding;
+  }
+
  private:
+  void SetVisibilityForDecorations(int* available_width);
+  void HideUnneededSeparators(int* available_width);
+  void SetBoundsForDecorations(gfx::Rect* bounds);
+
   // LEFT_EDGE means decorations are added from left to right and stacked on
   // the left of the omnibox, RIGHT_EDGE means the opposite.
   Position position_;
 
   // The padding between the last decoration and the edit box.
   int item_edit_padding_;
 
   // The padding between the edge and the edit box, if there are no decorations.
   int edge_edit_padding_;
 
   // The list of decorations to layout.
   ScopedVector<LocationBarDecoration> decorations_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarLayout);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_LAYOUT_H_