зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
3.9 KiB
C++
132 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/*
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* WinPointerEvents - Helper functions to retrieve PointerEvent's attributes
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*/
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#include "nscore.h"
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#include "WinPointerEvents.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/WindowsVersion.h"
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using namespace mozilla;
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using namespace mozilla::widget;
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const wchar_t WinPointerEvents::kPointerLibraryName[] = L"user32.dll";
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HMODULE WinPointerEvents::sLibraryHandle = nullptr;
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WinPointerEvents::GetPointerTypePtr WinPointerEvents::getPointerType = nullptr;
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WinPointerEvents::GetPointerInfoPtr WinPointerEvents::getPointerInfo = nullptr;
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WinPointerEvents::GetPointerPenInfoPtr WinPointerEvents::getPointerPenInfo = nullptr;
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bool WinPointerEvents::sPointerEventEnabled = true;
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WinPointerEvents::WinPointerEvents()
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{
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InitLibrary();
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static bool addedPointerEventEnabled = false;
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if (!addedPointerEventEnabled) {
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Preferences::AddBoolVarCache(&sPointerEventEnabled,
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"dom.w3c_pointer_events.enabled", true);
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addedPointerEventEnabled = true;
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}
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}
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/* Load and shutdown */
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void
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WinPointerEvents::InitLibrary()
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{
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MOZ_ASSERT(XRE_IsParentProcess());
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if (!IsWin8OrLater()) {
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// Only Win8 or later supports WM_POINTER*
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return;
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}
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if (getPointerType) {
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// Return if we already initialized the PointerEvent related interfaces
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return;
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}
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sLibraryHandle = ::LoadLibraryW(kPointerLibraryName);
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MOZ_ASSERT(sLibraryHandle, "cannot load pointer library");
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if (sLibraryHandle) {
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getPointerType =
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(GetPointerTypePtr)GetProcAddress(sLibraryHandle, "GetPointerType");
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getPointerInfo =
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(GetPointerInfoPtr)GetProcAddress(sLibraryHandle, "GetPointerInfo");
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getPointerPenInfo =
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(GetPointerPenInfoPtr)GetProcAddress(sLibraryHandle, "GetPointerPenInfo");
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}
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if (!getPointerType || !getPointerInfo || !getPointerPenInfo) {
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MOZ_ASSERT(false, "get PointerEvent interfaces failed");
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getPointerType = nullptr;
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getPointerInfo = nullptr;
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getPointerPenInfo = nullptr;
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return;
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}
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}
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bool
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WinPointerEvents::ShouldFireCompatibilityMouseEventsForPen(WPARAM aWParam)
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{
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if (!sLibraryHandle || !sPointerEventEnabled) {
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// Firing mouse events by handling Windows WM_POINTER* when preference is on
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// and the Windows platform supports PointerEvent related interfaces.
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return false;
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}
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uint32_t pointerId = GetPointerId(aWParam);
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POINTER_INPUT_TYPE pointerType = PT_POINTER;
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if (!GetPointerType(pointerId, &pointerType)) {
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MOZ_ASSERT(false, "cannot find PointerType");
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return false;
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}
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return (pointerType == PT_PEN);
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}
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bool
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WinPointerEvents::GetPointerType(uint32_t aPointerId,
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POINTER_INPUT_TYPE *aPointerType)
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{
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if (!getPointerType) {
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return false;
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}
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return getPointerType(aPointerId, aPointerType);
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}
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bool
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WinPointerEvents::GetPointerInfo(uint32_t aPointerId,
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POINTER_INFO *aPointerInfo)
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{
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if (!getPointerInfo) {
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return false;
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}
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return getPointerInfo(aPointerId, aPointerInfo);
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}
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bool
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WinPointerEvents::GetPointerPenInfo(uint32_t aPointerId,
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POINTER_PEN_INFO *aPenInfo)
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{
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if (!getPointerPenInfo) {
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return false;
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}
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return getPointerPenInfo(aPointerId, aPenInfo);
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}
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bool
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WinPointerEvents::ShouldEnableInkCollector()
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{
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// We need InkCollector on Win7. For Win8 or later, we handle WM_POINTER* for
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// pen.
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return !IsWin8OrLater();
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}
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bool
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WinPointerEvents::ShouldRollupOnPointerEvent(WPARAM aWParam)
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{
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// Only roll up popups when we handling WM_POINTER* to fire Gecko
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// WidgetMouseEvent and suppress Windows WM_*BUTTONDOWN.
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return ShouldFireCompatibilityMouseEventsForPen(aWParam);
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}
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