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// 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 CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_H_
#define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_H_
#pragma once
#include <string>
#include "base/basictypes.h"
#include "content/browser/renderer_host/render_view_host_delegate.h"
#include "content/common/content_export.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
class RenderViewHost;
class RenderWidgetHost;
class RenderWidgetHostView;
class TabContents;
// The TabContentsView is an interface that is implemented by the platform-
// dependent web contents views. The TabContents uses this interface to talk to
// them. View-related messages will also get forwarded directly to this class
// from RenderViewHost via RenderViewHostDelegate::View.
class CONTENT_EXPORT TabContentsView : public RenderViewHostDelegate::View {
public:
virtual ~TabContentsView();
virtual void CreateView(const gfx::Size& initial_size) = 0;
// Sets up the View that holds the rendered web page, receives messages for
// it and contains page plugins. The host view should be sized to the current
// size of the TabContents.
virtual RenderWidgetHostView* CreateViewForWidget(
RenderWidgetHost* render_widget_host) = 0;
// Returns the native widget that contains the contents of the tab.
virtual gfx::NativeView GetNativeView() const = 0;
// Returns the native widget with the main content of the tab (i.e. the main
// render view host, though there may be many popups in the tab as children of
// the container).
virtual gfx::NativeView GetContentNativeView() const = 0;
// Returns the outermost native view. This will be used as the parent for
// dialog boxes.
virtual gfx::NativeWindow GetTopLevelNativeWindow() const = 0;
// Computes the rectangle for the native widget that contains the contents of
// the tab relative to its parent.
virtual void GetContainerBounds(gfx::Rect *out) const = 0;
// Helper function for GetContainerBounds. Most callers just want to know the
// size, and this makes it more clear.
gfx::Size GetContainerSize() const {
gfx::Rect rc;
GetContainerBounds(&rc);
return gfx::Size(rc.width(), rc.height());
}
// Sets the page title for the native widgets corresponding to the view. This
// is not strictly necessary and isn't expected to be displayed anywhere, but
// can aid certain debugging tools such as Spy++ on Windows where you are
// trying to find a specific window.
virtual void SetPageTitle(const string16& title) = 0;
// Used to notify the view that a tab has crashed so each platform can
// prepare the sad tab.
virtual void OnTabCrashed(base::TerminationStatus status,
int error_code) = 0;
// TODO(brettw) this is a hack. It's used in two places at the time of this
// writing: (1) when render view hosts switch, we need to size the replaced
// one to be correct, since it wouldn't have known about sizes that happened
// while it was hidden; (2) in constrained windows.
//
// (1) will be fixed once interstitials are cleaned up. (2) seems like it
// should be cleaned up or done some other way, since this works for normal
// TabContents without the special code.
virtual void SizeContents(const gfx::Size& size) = 0;
// Invoked when the TabContents is notified that the RenderView has been
// fully created.
virtual void RenderViewCreated(RenderViewHost* host) = 0;
// Sets focus to the native widget for this tab.
virtual void Focus() = 0;
// Sets focus to the appropriate element when the tab contents is shown the
// first time.
virtual void SetInitialFocus() = 0;
// Stores the currently focused view.
virtual void StoreFocus() = 0;
// Restores focus to the last focus view. If StoreFocus has not yet been
// invoked, SetInitialFocus is invoked.
virtual void RestoreFocus() = 0;
// If we try to close the tab while a drag is in progress, we crash. These
// methods allow the tab contents to determine if a drag is in progress and
// postpone the tab closing.
virtual bool IsDoingDrag() const = 0;
virtual void CancelDragAndCloseTab() = 0;
// If we close the tab while a UI control is in an event-tracking
// loop, the control may message freed objects and crash.
// TabContents::Close() calls IsEventTracking(), and if it returns
// true CloseTabAfterEventTracking() is called and the close is not
// completed.
virtual bool IsEventTracking() const = 0;
virtual void CloseTabAfterEventTracking() = 0;
// Get the bounds of the View, relative to the parent.
// TODO(beng): Return a rect rather than using an out param.
virtual void GetViewBounds(gfx::Rect* out) const = 0;
protected:
TabContentsView(); // Abstract interface.
private:
DISALLOW_COPY_AND_ASSIGN(TabContentsView);
};
#endif // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_H_
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