[GTK] update infobars to new, harder-to-spoof versions.

This doesn't support the multiple infobar case. It does however support the following:
- There is a drop shadow over the render view content, over the toolbar area, and an arrow to the location icon.
- animations while enabling/disabling the bookmark bar, on normal page or NTP
- different infobar colors
- switching between tabs with or without infobars
- animated appearance/disappearance (animation is alpha-fade)

Popup windows don't appear to support infobars (at least I can't get an infobar to open in a popup window), but this new code doesn't cause crashes there either.

BUG=48996
TEST=manual (see above)

Review URL: http://codereview.chromium.org/3621010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62001 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 51 insertions, 4 deletions

diff --git a/chrome/browser/gtk/browser_window_gtk.h b/chrome/browser/gtk/browser_window_gtk.h
index 2f0746f..ce6fd20 100644
--- a/chrome/browser/gtk/browser_window_gtk.h
+++ b/chrome/browser/gtk/browser_window_gtk.h
@@ -12,6 +12,7 @@
 
 #include "app/active_window_watcher_x.h"
 #include "app/gtk_signal.h"
+#include "app/slide_animation.h"
 #include "app/x11_util.h"
 #include "base/scoped_ptr.h"
 #include "base/timer.h"
@@ -43,7 +44,8 @@ class TabStripGtk;
 class BrowserWindowGtk : public BrowserWindow,
                          public NotificationObserver,
                          public TabStripModelObserver,
-                         public ActiveWindowWatcherX::Observer {
+                         public ActiveWindowWatcherX::Observer,
+                         public AnimationDelegate {
  public:
   explicit BrowserWindowGtk(Browser* browser);
   virtual ~BrowserWindowGtk();
@@ -140,9 +142,14 @@ class BrowserWindowGtk : public BrowserWindow,
                              bool user_gesture);
   virtual void TabStripEmpty();
 
-  // Overriden from ActiveWindowWatcher::Observer.
+  // Overridden from ActiveWindowWatcher::Observer.
   virtual void ActiveWindowChanged(GdkWindow* active_window);
 
+  // Overridden from AnimationDelegate.
+  virtual void AnimationEnded(const Animation* animation);
+  virtual void AnimationProgressed(const Animation* animation);
+  virtual void AnimationCanceled(const Animation* animation);
+
   // Accessor for the tab strip.
   TabStripGtk* tabstrip() const { return tabstrip_.get(); }
 
@@ -171,6 +178,17 @@ class BrowserWindowGtk : public BrowserWindow,
   // else for the custom frame.
   void ResetCustomFrameCursor();
 
+  // Toggles whether an infobar is showing. If |colors| is NULL, then no infobar
+  // is showing. When non-NULL, |colors| describes the gradient stop colors for
+  // the showing infobar.
+  // |animate| controls whether we animate to the new state set by |colors|.
+  void SetInfoBarShowing(const std::pair<SkColor, SkColor>* colors,
+                         bool animate);
+
+  // Called by the RenderViewHostDelegate::View (TabContentsViewGtk in our case)
+  // to decide whether to draw a drop shadow on the render view.
+  bool ShouldDrawInfobarDropShadowOnRenderView();
+
   // Returns the BrowserWindowGtk registered with |window|.
   static BrowserWindowGtk* GetBrowserWindowForNativeWindow(
       gfx::NativeWindow window);
@@ -219,8 +237,7 @@ class BrowserWindowGtk : public BrowserWindow,
   GtkWidget* render_area_floating_container_;
   // EventBox that holds render_area_floating_container_.
   GtkWidget* render_area_event_box_;
-  // Border between toolbar and render area. This is hidden when the find bar
-  // is added because thereafter the findbar will draw the border for us.
+  // Border between toolbar and render area.
   GtkWidget* toolbar_border_;
 
   scoped_ptr<Browser> browser_;
@@ -289,6 +306,27 @@ class BrowserWindowGtk : public BrowserWindow,
   // activation state / incognito state.
   int GetThemeFrameResource();
 
+  // Invalidate all the widgets that need to redraw when the infobar draw state
+  // has changed.
+  void InvalidateInfoBarBits();
+
+  // Used to draw the infobar arrow and drop shadow. This is connected to
+  // multiple widgets' expose events because it overlaps several widgets.
+  CHROMEGTK_CALLBACK_1(BrowserWindowGtk, gboolean, OnExposeDrawInfobarBits,
+                       GdkEventExpose*);
+
+  // Used to draw the infobar bits for the bookmark bar. When the bookmark
+  // bar is in floating mode, it has to draw a drop shadow only; otherwise
+  // it is responsible for its portion of the arrow as well as some shadowing.
+  CHROMEGTK_CALLBACK_1(BrowserWindowGtk, gboolean, OnBookmarkBarExpose,
+                       GdkEventExpose*);
+
+  // Callback for "size-allocate" signal on bookmark bar; this is relevant
+  // because when the bookmark bar changes dimensions, the infobar arrow has to
+  // change its shape, and we need to queue appropriate redraws.
+  CHROMEGTK_CALLBACK_1(BrowserWindowGtk, void, OnBookmarkBarSizeAllocate,
+                       GtkAllocation*);
+
   // Callback for accelerator activation. |user_data| stores the command id
   // of the matched accelerator.
   static gboolean OnGtkAccelerator(GtkAccelGroup* accel_group,
@@ -377,6 +415,9 @@ class BrowserWindowGtk : public BrowserWindow,
   // bookmark bar is not supported.
   scoped_ptr<BookmarkBarGtk> bookmark_bar_;
 
+  // Caches the hover state of the bookmark bar.
+  bool bookmark_bar_is_floating_;
+
   // The status bubble manager.  Always non-NULL.
   scoped_ptr<StatusBubbleGtk> status_bubble_;
 
@@ -439,6 +480,12 @@ class BrowserWindowGtk : public BrowserWindow,
 
   scoped_ptr<FullscreenExitBubbleGtk> fullscreen_exit_bubble_;
 
+  // The top and bottom colors for the infobar gradient, if there is an
+  // infobar showing.
+  std::pair<SkColor, SkColor> infobar_colors_;
+
+  SlideAnimation infobar_animation_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserWindowGtk);
 };