content/browser/web_contents/web_contents_view.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_H_
   6 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/strings/string16.h"
  12 #include "content/common/content_export.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/gfx/geometry/size.h"
  15 #include "ui/gfx/native_widget_types.h"
  16
  17 namespace content {
  18 class RenderViewHost;
  19 class RenderWidgetHost;
  20 class RenderWidgetHostViewBase;
  21 struct DropData;
  22
  23 // The WebContentsView is an interface that is implemented by the platform-
  24 // dependent web contents views. The WebContents uses this interface to talk to
  25 // them.
  26 class WebContentsView {
  27  public:
  28   virtual ~WebContentsView() {}
  29
  30   // Returns the native widget that contains the contents of the tab.
  31   virtual gfx::NativeView GetNativeView() const = 0;
  32
  33   // Returns the native widget with the main content of the tab (i.e. the main
  34   // render view host, though there may be many popups in the tab as children of
  35   // the container).
  36   virtual gfx::NativeView GetContentNativeView() const = 0;
  37
  38   // Returns the outermost native view. This will be used as the parent for
  39   // dialog boxes.
  40   virtual gfx::NativeWindow GetTopLevelNativeWindow() const = 0;
  41
  42   // Computes the rectangle for the native widget that contains the contents of
  43   // the tab in the screen coordinate system.
  44   virtual void GetContainerBounds(gfx::Rect* out) const = 0;
  45
  46   // TODO(brettw) this is a hack. It's used in two places at the time of this
  47   // writing: (1) when render view hosts switch, we need to size the replaced
  48   // one to be correct, since it wouldn't have known about sizes that happened
  49   // while it was hidden; (2) in constrained windows.
  50   //
  51   // (1) will be fixed once interstitials are cleaned up. (2) seems like it
  52   // should be cleaned up or done some other way, since this works for normal
  53   // WebContents without the special code.
  54   virtual void SizeContents(const gfx::Size& size) = 0;
  55
  56   // Sets focus to the native widget for this tab.
  57   virtual void Focus() = 0;
  58
  59   // Sets focus to the appropriate element when the WebContents is shown the
  60   // first time.
  61   virtual void SetInitialFocus() = 0;
  62
  63   // Stores the currently focused view.
  64   virtual void StoreFocus() = 0;
  65
  66   // Restores focus to the last focus view. If StoreFocus has not yet been
  67   // invoked, SetInitialFocus is invoked.
  68   virtual void RestoreFocus() = 0;
  69
  70   // Returns the current drop data, if any.
  71   virtual DropData* GetDropData() const = 0;
  72
  73   // Get the bounds of the View, relative to the parent.
  74   virtual gfx::Rect GetViewBounds() const = 0;
  75
  76   virtual void CreateView(
  77       const gfx::Size& initial_size, gfx::NativeView context) = 0;
  78
  79   // Sets up the View that holds the rendered web page, receives messages for
  80   // it and contains page plugins. The host view should be sized to the current
  81   // size of the WebContents.
  82   //
  83   // |is_guest_view_hack| is temporary hack and will be removed once
  84   // RenderWidgetHostViewGuest is not dependent on platform view.
  85   // TODO(lazyboy): Remove |is_guest_view_hack| once http://crbug.com/330264 is
  86   // fixed.
  87   virtual RenderWidgetHostViewBase* CreateViewForWidget(
  88       RenderWidgetHost* render_widget_host, bool is_guest_view_hack) = 0;
  89
  90   // Creates a new View that holds a popup and receives messages for it.
  91   virtual RenderWidgetHostViewBase* CreateViewForPopupWidget(
  92       RenderWidgetHost* render_widget_host) = 0;
  93
  94   // Sets the page title for the native widgets corresponding to the view. This
  95   // is not strictly necessary and isn't expected to be displayed anywhere, but
  96   // can aid certain debugging tools such as Spy++ on Windows where you are
  97   // trying to find a specific window.
  98   virtual void SetPageTitle(const base::string16& title) = 0;
  99
 100   // Invoked when the WebContents is notified that the RenderView has been
 101   // fully created.
 102   virtual void RenderViewCreated(RenderViewHost* host) = 0;
 103
 104   // Invoked when the WebContents is notified that the RenderView has been
 105   // swapped in.
 106   virtual void RenderViewSwappedIn(RenderViewHost* host) = 0;
 107
 108   // Invoked to enable/disable overscroll gesture navigation.
 109   virtual void SetOverscrollControllerEnabled(bool enabled) = 0;
 110
 111 #if defined(OS_MACOSX)
 112   // Allowing other views disables optimizations which assume that only a single
 113   // WebContents is present.
 114   virtual void SetAllowOtherViews(bool allow) = 0;
 115
 116   // Returns true if other views are allowed, false otherwise.
 117   virtual bool GetAllowOtherViews() const = 0;
 118
 119   // If we close the tab while a UI control is in an event-tracking
 120   // loop, the control may message freed objects and crash.
 121   // WebContents::Close() calls IsEventTracking(), and if it returns
 122   // true CloseTabAfterEventTracking() is called and the close is not
 123   // completed.
 124   virtual bool IsEventTracking() const = 0;
 125   virtual void CloseTabAfterEventTracking() = 0;
 126 #endif
 127 };
 128
 129 }  // namespace content
 130
 131 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_H_