tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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PresShellWidgetListener.h (3081B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef mozilla_PresShellWidgetListener_h__
      7 #define mozilla_PresShellWidgetListener_h__
      8 
      9 #include "Units.h"
     10 #include "mozilla/Attributes.h"
     11 #include "mozilla/CallState.h"
     12 #include "nsCOMPtr.h"
     13 #include "nsIWidgetListener.h"
     14 
     15 class nsIWidget;
     16 
     17 namespace mozilla {
     18 class PresShell;
     19 namespace dom {
     20 class BrowserParent;
     21 }  // namespace dom
     22 namespace widget {
     23 struct InitData;
     24 enum class TransparencyMode : uint8_t;
     25 enum class WindowType : uint8_t;
     26 }  // namespace widget
     27 
     28 class PresShellWidgetListener final : public nsIWidgetListener {
     29 public:
     30  // Stops listening to mWidget and clears it.
     31  void DetachWidget();
     32 
     33  /**
     34   * Attach/detach a top level widget. Attaching allows the shell to begin
     35   * receiving gecko events. The underlying base window associated with the
     36   * widget will continues to receive events it expects.
     37   *
     38   * An attached widget will not be destroyed when we are destroyed,
     39   * allowing the recycling of a single top level widget over multiple pres
     40   * shells.
     41   *
     42   * @param aWidget The widget to attach to / detach from.
     43   */
     44  void AttachToTopLevelWidget(nsIWidget* aWidget);
     45  void DetachFromTopLevelWidget();
     46 
     47  static uint32_t GetLastUserEventTime();
     48 
     49  nsIWidget* GetWidget() const { return mWindow; }
     50  bool HasWidget() const { return !!mWindow; }
     51 
     52  // nsIWidgetListener
     53  mozilla::PresShell* GetPresShell() override;
     54  PresShellWidgetListener* GetAsPresShellWidgetListener() override {
     55    return this;
     56  }
     57  bool IsPaintSuppressed() const override {
     58    return IsPrimaryFramePaintSuppressed();
     59  }
     60  void WindowResized(nsIWidget*, const LayoutDeviceIntSize&) override;
     61  void DynamicToolbarMaxHeightChanged(mozilla::ScreenIntCoord aHeight) override;
     62  void DynamicToolbarOffsetChanged(mozilla::ScreenIntCoord aOffset) override;
     63  void KeyboardHeightChanged(mozilla::ScreenIntCoord aHeight) override;
     64  void AndroidPipModeChanged(bool) override;
     65  MOZ_CAN_RUN_SCRIPT_BOUNDARY
     66  void PaintWindow(nsIWidget* aWidget) override;
     67  void DidCompositeWindow(mozilla::layers::TransactionId aTransactionId,
     68                          const mozilla::TimeStamp& aCompositeStart,
     69                          const mozilla::TimeStamp& aCompositeEnd) override;
     70  MOZ_CAN_RUN_SCRIPT_BOUNDARY
     71  nsEventStatus HandleEvent(mozilla::WidgetGUIEvent*) override;
     72  void SafeAreaInsetsChanged(const mozilla::LayoutDeviceIntMargin&) override;
     73 
     74  explicit PresShellWidgetListener(mozilla::PresShell*);
     75  virtual ~PresShellWidgetListener();
     76 
     77  bool IsPrimaryFramePaintSuppressed() const;
     78 
     79 private:
     80  void CallOnAllRemoteChildren(
     81      const std::function<mozilla::CallState(mozilla::dom::BrowserParent*)>&
     82          aCallback);
     83 
     84  mozilla::PresShell* mPresShell = nullptr;
     85  nsCOMPtr<nsIWidget> mWindow;
     86  nsCOMPtr<nsIWidget> mPreviousWindow;
     87 };
     88 
     89 }  // namespace mozilla
     90 
     91 #endif