author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 24 Sep 2009 12:53:48 +0300 | |
changeset 11 | c8a366e56285 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "SharedTimer.h" |
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#include "Page.h" |
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#include "SystemTime.h" |
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#include "Widget.h" |
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#include <wtf/Assertions.h> |
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#include <windows.h> |
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namespace WebCore { |
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static UINT timerID; |
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static void (*sharedTimerFiredFunction)(); |
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static HWND timerWindowHandle = 0; |
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static UINT timerFiredMessage = 0; |
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const LPCWSTR kTimerWindowClassName = L"TimerWindowClass"; |
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static bool processingCustomTimerMessage = false; |
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LRESULT CALLBACK TimerWindowWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) |
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{ |
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if (message == timerFiredMessage) { |
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processingCustomTimerMessage = true; |
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sharedTimerFiredFunction(); |
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processingCustomTimerMessage = false; |
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} else |
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return DefWindowProc(hWnd, message, wParam, lParam); |
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return 0; |
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} |
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static void initializeOffScreenTimerWindow() |
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{ |
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if (timerWindowHandle) |
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return; |
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WNDCLASSEX wcex; |
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memset(&wcex, 0, sizeof(WNDCLASSEX)); |
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wcex.cbSize = sizeof(WNDCLASSEX); |
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wcex.lpfnWndProc = TimerWindowWndProc; |
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wcex.hInstance = Page::instanceHandle(); |
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wcex.lpszClassName = kTimerWindowClassName; |
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RegisterClassEx(&wcex); |
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timerWindowHandle = CreateWindow(kTimerWindowClassName, 0, 0, |
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CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, HWND_MESSAGE, 0, Page::instanceHandle(), 0); |
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timerFiredMessage = RegisterWindowMessage(L"com.apple.WebKit.TimerFired"); |
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} |
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void setSharedTimerFiredFunction(void (*f)()) |
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{ |
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sharedTimerFiredFunction = f; |
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} |
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static void CALLBACK timerFired(HWND, UINT, UINT_PTR, DWORD) |
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{ |
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sharedTimerFiredFunction(); |
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} |
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void setSharedTimerFireTime(double fireTime) |
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{ |
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ASSERT(sharedTimerFiredFunction); |
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double interval = fireTime - currentTime(); |
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unsigned intervalInMS; |
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if (interval < 0) |
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intervalInMS = 0; |
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else { |
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interval *= 1000; |
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if (interval > USER_TIMER_MAXIMUM) |
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intervalInMS = USER_TIMER_MAXIMUM; |
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else |
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intervalInMS = (unsigned)interval; |
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} |
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if (timerID) { |
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KillTimer(0, timerID); |
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timerID = 0; |
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} |
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// We don't allow nested PostMessages, since the custom messages will effectively starve |
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// painting and user input. (Win32 has a tri-level queue with application messages > |
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// user input > WM_PAINT/WM_TIMER.) |
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// In addition, if the queue contains input events that have been there since the last call to |
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// GetQueueStatus, PeekMessage or GetMessage we favor timers. |
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if (intervalInMS < USER_TIMER_MINIMUM && !processingCustomTimerMessage && |
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!LOWORD(::GetQueueStatus(QS_ALLINPUT))) { |
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// Windows SetTimer does not allow timeouts smaller than 10ms (USER_TIMER_MINIMUM) |
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initializeOffScreenTimerWindow(); |
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PostMessage(timerWindowHandle, timerFiredMessage, 0, 0); |
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} else |
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timerID = SetTimer(0, 0, intervalInMS, timerFired); |
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} |
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118 |
|
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void stopSharedTimer() |
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120 |
{ |
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if (timerID) { |
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KillTimer(0, timerID); |
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timerID = 0; |
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} |
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} |
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126 |
|
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} |