Merge pull request #6577 from symless/v1-issue-5294-cursor-locked
Prevented cursor moving off screen when a locking issue may occur
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commit
e367fa9d61
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@ -329,6 +329,13 @@ MSWindowsScreen::enter()
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bool
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MSWindowsScreen::leave()
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{
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POINT pos;
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if (!getThisCursorPos(&pos))
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{
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LOG((CLOG_DEBUG "Unable to leave screen as Windows security has disabled critical functions required to let synergy work"));
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//unable to get position this means synergy will break if the cursor leaves the screen
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return false;
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}
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// get keyboard layout of foreground window. we'll use this
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// keyboard layout for translating keys sent to clients.
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HWND window = GetForegroundWindow();
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@ -539,6 +546,60 @@ MSWindowsScreen::getCursorPos(SInt32& x, SInt32& y) const
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m_desks->getCursorPos(x, y);
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}
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/*
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* getThisCursorPos and setThisCursorPos will attempt to negotiate with the system
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* to try get the and set the mouse position, however on the logon screen due to
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* hooks this process has it may unable to work around the problem. Although these
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* functions did not fix the issue at hand (#5294) its worth keeping them here anyway.
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*/
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bool MSWindowsScreen::getThisCursorPos(LPPOINT pos)
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{
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auto result = GetCursorPos(pos);
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auto error = GetLastError();
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LOG((CLOG_DEBUG3 "%s Attempt: 1 , status %d, code: %d Pos {%d, %d}", __func__, result, error, pos->x, pos->y));
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if (!result)
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{
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result = GetCursorPos(pos);
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error = GetLastError();
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LOG((CLOG_INFO "%s Attempt: 2, status %d, code: %d Pos {%d, %d}", __func__, result, error, pos->x, pos->y));
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updateDesktopThread();
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}
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return result;
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}
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bool MSWindowsScreen::setThisCursorPos(int x, int y)
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{
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auto result = SetCursorPos(x, y);
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auto error = GetLastError();
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LOG((CLOG_DEBUG3 "%s Attempt: 1, status %d, code: %d", __func__, result, error));
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if (!result)
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{
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result = SetCursorPos(x, y);
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error = GetLastError();
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LOG((CLOG_INFO "%s Attempt: 2, status %d, code: %d", __func__, result, error));
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updateDesktopThread();
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}
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return result;
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}
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void MSWindowsScreen::updateDesktopThread()
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{
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LOG((CLOG_DEBUG3 "Failed to set cursor Attempting to switch desktop"));
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SetLastError(0);
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HDESK cur_hdesk = OpenInputDesktop(0, true, GENERIC_ALL);
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auto error = GetLastError();
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LOG((CLOG_DEBUG3 "\tGetting desktop Handle: %p Status code: %d", cur_hdesk, error));
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error = GetLastError();
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LOG((CLOG_DEBUG3 "\tSetting desktop return: %d Status code: %d", SetThreadDesktop(cur_hdesk), GetLastError()));
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CloseDesktop(cur_hdesk);
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}
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void
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MSWindowsScreen::reconfigure(UInt32 activeSides)
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{
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@ -1524,12 +1585,12 @@ MSWindowsScreen::warpCursorNoFlush(SInt32 x, SInt32 y)
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// warp mouse. hopefully this inserts a mouse motion event
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// between the previous message and the following message.
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SetCursorPos(x, y);
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setThisCursorPos(x, y);
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// check to see if the mouse pos was set correctly
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POINT cursorPos;
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GetCursorPos(&cursorPos);
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getThisCursorPos(&cursorPos);
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// there is a bug or round error in SetCursorPos and GetCursorPos on
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// a high DPI setting. The check here is for Vista/7 login screen.
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// since this feature is mainly for client, so only check on client.
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@ -75,6 +75,25 @@ public:
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SInt32& width, SInt32& height) const;
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virtual void getCursorPos(SInt32& x, SInt32& y) const;
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/**
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* \brief Get the position of the cursor on the current machine
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* \param pos the object that the function will use to store the position of the cursor
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* \return true if the function was successful
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*/
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virtual bool getThisCursorPos(LPPOINT pos);
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/**
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* \brief Sets the cursor position on the current machine
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* \param x The x coordinate of the cursor
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* \param y The Y coordinate of the cursor
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* \return True is successful
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*/
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virtual bool setThisCursorPos(int x, int y);
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/**
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* \brief This function will attempt to switch to the current desktop the mouse is located on
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*/
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virtual void updateDesktopThread();
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// IPrimaryScreen overrides
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virtual void reconfigure(UInt32 activeSides);
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virtual void warpCursor(SInt32 x, SInt32 y);
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