113 lines
4.4 KiB
C++
113 lines
4.4 KiB
C++
/*
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* Copyright (C) 2006, 2007 Apple 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 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 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 "PlatformWheelEvent.h"
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#include "FloatPoint.h"
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#include "FloatSize.h"
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#include "GDIUtilities.h"
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#include "HWndDC.h"
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#include <windows.h>
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#include <windowsx.h>
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namespace WebCore {
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#define HIGH_BIT_MASK_SHORT 0x8000
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#define SPI_GETWHEELSCROLLCHARS 0x006C
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static IntPoint positionForEvent(HWND hWnd, LPARAM lParam)
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{
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POINT point = {GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
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ScreenToClient(hWnd, &point);
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IntPoint logicalPoint(point);
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float inverseScaleFactor = 1.0f / deviceScaleFactorForWindow(hWnd);
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logicalPoint.scale(inverseScaleFactor, inverseScaleFactor);
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return logicalPoint;
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}
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static IntPoint globalPositionForEvent(HWND hWnd, LPARAM lParam)
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{
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IntPoint logicalPoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
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float inverseScaleFactor = 1.0f / deviceScaleFactorForWindow(hWnd);
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logicalPoint.scale(inverseScaleFactor, inverseScaleFactor);
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return logicalPoint;
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}
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static int horizontalScrollChars()
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{
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static ULONG scrollChars;
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if (!scrollChars && !SystemParametersInfo(SPI_GETWHEELSCROLLCHARS, 0, &scrollChars, 0))
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scrollChars = 1;
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return scrollChars;
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}
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static int verticalScrollLines()
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{
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static ULONG scrollLines;
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if (!scrollLines && !SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &scrollLines, 0))
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scrollLines = 3;
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return scrollLines;
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}
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PlatformWheelEvent::PlatformWheelEvent(HWND hWnd, WPARAM wParam, LPARAM lParam, bool isMouseHWheel)
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: PlatformEvent(PlatformEvent::Wheel, wParam & MK_SHIFT, wParam & MK_CONTROL, GetKeyState(VK_MENU) & HIGH_BIT_MASK_SHORT, GetKeyState(VK_MENU) & HIGH_BIT_MASK_SHORT, WallTime::fromRawSeconds(::GetTickCount() * 0.001))
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, m_position(positionForEvent(hWnd, lParam))
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, m_globalPosition(globalPositionForEvent(hWnd, lParam))
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, m_directionInvertedFromDevice(false)
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{
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float scaleFactor = deviceScaleFactorForWindow(hWnd);
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float delta = GET_WHEEL_DELTA_WPARAM(wParam) / (scaleFactor * static_cast<float>(WHEEL_DELTA));
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if (isMouseHWheel) {
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// Windows is <-- -/+ -->, WebKit wants <-- +/- -->, so we negate
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// |delta| after saving the original value on the wheel tick member.
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m_wheelTicksX = delta;
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m_wheelTicksY = 0;
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delta = -delta;
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} else {
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// Even though we use shift + vertical wheel to scroll horizontally in
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// WebKit, we still note it as a vertical scroll on the wheel tick
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// member, so that the DOM event we later construct will match the real
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// hardware event better.
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m_wheelTicksX = 0;
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m_wheelTicksY = delta;
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}
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if (isMouseHWheel || shiftKey()) {
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m_deltaX = delta * static_cast<float>(horizontalScrollChars()) * cScrollbarPixelsPerLine;
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m_deltaY = 0;
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m_granularity = ScrollByPixelWheelEvent;
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} else {
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m_deltaX = 0;
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m_deltaY = delta;
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int verticalMultiplier = verticalScrollLines();
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m_granularity = (verticalMultiplier == WHEEL_PAGESCROLL) ? ScrollByPageWheelEvent : ScrollByPixelWheelEvent;
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if (m_granularity == ScrollByPixelWheelEvent)
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m_deltaY *= static_cast<float>(verticalMultiplier) * cScrollbarPixelsPerLine;
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}
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}
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}
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