Misc. infobar stuff:

chrome/browser/ui/views/infobars/infobar_container.h

-// Copyright (c) 2011 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_INFOBARS_INFOBAR_CONTAINER_H_
-#define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_CONTAINER_H_
-#pragma once
-
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "content/common/notification_observer.h"
-#include "content/common/notification_registrar.h"
-#include "third_party/skia/include/core/SkColor.h"
-
-class InfoBar;
-class InfoBarDelegate;
-class TabContents;
-class TabContentsWrapper;
-
-// InfoBarContainer is a cross-platform base class to handle the visibility-
-// related aspects of InfoBars.  While InfoBars own themselves, the
-// InfoBarContainer is responsible for telling particular InfoBars that they
-// should be hidden or visible.
-//
-// Platforms need to subclass this to implement a few platform-specific
-// functions, which are pure virtual here.
-class InfoBarContainer : public NotificationObserver {
- public:
-  class Delegate {
-   public:
-    // The separator color may vary depending on where the container is hosted.
-    virtual SkColor GetInfoBarSeparatorColor() const = 0;
-
-    // The delegate is notified each time the infobar container changes height,
-    // as well as when it stops animating.
-    virtual void InfoBarContainerStateChanged(bool is_animating) = 0;
-
-    // The delegate needs to tell us whether "unspoofable" arrows should be
-    // drawn, and if so, at what |x| coordinate.  |x| may be NULL.
-    virtual bool DrawInfoBarArrows(int* x) const = 0;
-
-   protected:
-    virtual ~Delegate();
-  };
-
-  explicit InfoBarContainer(Delegate* delegate);
-  virtual ~InfoBarContainer();
-
-  // Changes the TabContents for which this container is showing infobars.  This
-  // will remove all current infobars from the container, add the infobars from
-  // |contents|, and show them all.  |contents| may be NULL.
-  void ChangeTabContents(TabContentsWrapper* contents);
-
-  // Returns the amount by which to overlap the toolbar above, and, when
-  // |total_height| is non-NULL, set it to the height of the InfoBarContainer
-  // (including overlap).
-  int GetVerticalOverlap(int* total_height);
-
-  // Called by the delegate when the distance between what the top infobar's
-  // "unspoofable" arrow would point to and the top infobar itself changes.
-  // This enables the top infobar to show a longer arrow (e.g. because of a
-  // visible bookmark bar) or shorter (e.g. due to being in a popup window) if
-  // desired.
-  //
-  // IMPORTANT: This MUST NOT result in a call back to
-  // Delegate::InfoBarContainerStateChanged() unless it causes an actual
-  // change, lest we infinitely recurse.
-  void SetMaxTopArrowHeight(int height);
-
-  // Called when a contained infobar has animated or by some other means changed
-  // its height, or when it stops animating.  The container is expected to do
-  // anything necessary to respond, e.g. re-layout.
-  void OnInfoBarStateChanged(bool is_animating);
-
-  // Removes the specified InfoBarDelegate from the selected TabContents.  This
-  // will notify us back and cause us to close the InfoBar.  This is called from
-  // the InfoBar's close button handler.
-  void RemoveDelegate(InfoBarDelegate* delegate);
-
-  // Called by |infobar| to request that it be removed from the container, as it
-  // is about to delete itself.  At this point, |infobar| should already be
-  // hidden.
-  void RemoveInfoBar(InfoBar* infobar);
-
-  const Delegate* delegate() const { return delegate_; }
-
- protected:
-  // Subclasses must call this during destruction, so that we can remove
-  // infobars (which will call the pure virtual functions below) while the
-  // subclass portion of |this| has not yet been destroyed.
-  void RemoveAllInfoBarsForDestruction();
-
-  // These must be implemented on each platform to e.g. adjust the visible
-  // object hierarchy.
-  virtual void PlatformSpecificAddInfoBar(InfoBar* infobar) = 0;
-  virtual void PlatformSpecificRemoveInfoBar(InfoBar* infobar) = 0;
-
- private:
-  typedef std::vector<InfoBar*> InfoBars;
-
-  // NotificationObserver:
-  virtual void Observe(NotificationType type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details) OVERRIDE;
-
-  // Removes an InfoBar for the specified delegate, in response to a
-  // notification from the selected TabContents. The InfoBar's disappearance
-  // will be animated if |use_animation| is true.
-  void RemoveInfoBar(InfoBarDelegate* delegate, bool use_animation);
-
-  // Adds |infobar| to this container and calls Show() on it.  |animate| is
-  // passed along to infobar->Show().  Depending on the value of
-  // |callback_status|, this calls infobar->set_container(this) either before or
-  // after the call to Show() so that OnInfoBarAnimated() either will or won't
-  // be called as a result.
-  enum CallbackStatus { NO_CALLBACK, WANT_CALLBACK };
-  void AddInfoBar(InfoBar* infobar,
-                  bool animate,
-                  CallbackStatus callback_status);
-
-  void UpdateInfoBarArrowTargetHeights();
-  int ArrowTargetHeightForInfoBar(size_t infobar_index) const;
-
-  NotificationRegistrar registrar_;
-  Delegate* delegate_;
-  TabContentsWrapper* tab_contents_;
-  InfoBars infobars_;
-
-  // Calculated in SetMaxTopArrowHeight().
-  int top_arrow_target_height_;
-
-  DISALLOW_COPY_AND_ASSIGN(InfoBarContainer);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_CONTAINER_H_