forked from mirrors/gecko-dev
cba747de45
Our telemetry data showed `WinUtils::GetNSWindowPtr` returned nullptr when constructing `TaskbarTabPreview`. We can't find a way to make such a situation, but these crashes tell us we should not assume `GetNSWindowPtr` always returns a valid pointer. A proposed fix is to change the return value of `GetWindowHook()` from a reference to a pointer so that the caller can decide what to do when nullptr is returned. Differential Revision: https://phabricator.services.mozilla.com/D91471
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/* vim: se cin sw=2 ts=2 et : */
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __mozilla_widget_TaskbarWindowPreview_h__
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#define __mozilla_widget_TaskbarWindowPreview_h__
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#include "nsITaskbarWindowPreview.h"
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#include "nsITaskbarProgress.h"
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#include "nsITaskbarOverlayIconController.h"
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#include "TaskbarPreview.h"
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#include "nsWeakReference.h"
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namespace mozilla {
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namespace widget {
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class TaskbarPreviewButton;
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class TaskbarWindowPreview : public TaskbarPreview,
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public nsITaskbarWindowPreview,
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public nsITaskbarProgress,
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public nsITaskbarOverlayIconController,
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public nsSupportsWeakReference {
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virtual ~TaskbarWindowPreview();
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public:
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TaskbarWindowPreview(ITaskbarList4* aTaskbar,
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nsITaskbarPreviewController* aController, HWND aHWND,
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nsIDocShell* aShell);
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virtual nsresult Init() override;
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NS_DECL_ISUPPORTS
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NS_DECL_NSITASKBARWINDOWPREVIEW
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NS_DECL_NSITASKBARPROGRESS
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NS_DECL_NSITASKBAROVERLAYICONCONTROLLER
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NS_FORWARD_NSITASKBARPREVIEW(TaskbarPreview::)
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virtual LRESULT WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam) override;
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private:
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virtual nsresult ShowActive(bool active) override;
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virtual HWND& PreviewWindow() override;
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virtual nsresult UpdateTaskbarProperties() override;
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virtual nsresult Enable() override;
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virtual nsresult Disable() override;
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virtual void DetachFromNSWindow() override;
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nsresult UpdateButton(uint32_t index);
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nsresult UpdateButtons();
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// Is custom drawing enabled?
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bool mCustomDrawing;
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// Have we made any buttons?
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bool mHaveButtons;
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// Windows button format
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THUMBBUTTON mThumbButtons[nsITaskbarWindowPreview::NUM_TOOLBAR_BUTTONS];
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// Pointers to our button class (cached instances)
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nsWeakPtr mWeakButtons[nsITaskbarWindowPreview::NUM_TOOLBAR_BUTTONS];
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// Called to update ITaskbarList4 dependent properties
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nsresult UpdateTaskbarProgress();
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nsresult UpdateOverlayIcon();
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// The taskbar progress
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TBPFLAG mState;
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ULONGLONG mCurrentValue;
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ULONGLONG mMaxValue;
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// Taskbar overlay icon
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HICON mOverlayIcon;
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nsString mIconDescription;
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// WindowHook procedure for hooking mWnd for taskbar progress and icon stuff
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static bool TaskbarWindowHook(void* aContext, HWND hWnd, UINT nMsg,
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WPARAM wParam, LPARAM lParam, LRESULT* aResult);
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friend class TaskbarPreviewButton;
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};
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} // namespace widget
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} // namespace mozilla
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#endif /* __mozilla_widget_TaskbarWindowPreview_h__ */
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