gecko-dev/widget/windows/nsWinGesture.cpp

641 строка
19 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Jim Mathies <jmathies@mozilla.com>.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* nsWinGesture - Touch input handling for tablet displays.
*/
#include "nscore.h"
#include "nsWinGesture.h"
#include "nsUXThemeData.h"
#include "nsIDOMSimpleGestureEvent.h"
#include "nsGUIEvent.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifdef PR_LOGGING
extern PRLogModuleInfo* gWindowsLog;
#endif
const PRUnichar nsWinGesture::kGestureLibraryName[] = L"user32.dll";
HMODULE nsWinGesture::sLibraryHandle = nsnull;
nsWinGesture::GetGestureInfoPtr nsWinGesture::getGestureInfo = nsnull;
nsWinGesture::CloseGestureInfoHandlePtr nsWinGesture::closeGestureInfoHandle = nsnull;
nsWinGesture::GetGestureExtraArgsPtr nsWinGesture::getGestureExtraArgs = nsnull;
nsWinGesture::SetGestureConfigPtr nsWinGesture::setGestureConfig = nsnull;
nsWinGesture::GetGestureConfigPtr nsWinGesture::getGestureConfig = nsnull;
nsWinGesture::BeginPanningFeedbackPtr nsWinGesture::beginPanningFeedback = nsnull;
nsWinGesture::EndPanningFeedbackPtr nsWinGesture::endPanningFeedback = nsnull;
nsWinGesture::UpdatePanningFeedbackPtr nsWinGesture::updatePanningFeedback = nsnull;
nsWinGesture::RegisterTouchWindowPtr nsWinGesture::registerTouchWindow = nsnull;
nsWinGesture::UnregisterTouchWindowPtr nsWinGesture::unregisterTouchWindow = nsnull;
nsWinGesture::GetTouchInputInfoPtr nsWinGesture::getTouchInputInfo = nsnull;
nsWinGesture::CloseTouchInputHandlePtr nsWinGesture::closeTouchInputHandle = nsnull;
static bool gEnableSingleFingerPanEvents = false;
nsWinGesture::nsWinGesture() :
mPanActive(false),
mFeedbackActive(false),
mXAxisFeedback(false),
mYAxisFeedback(false),
mPanInertiaActive(false)
{
(void)InitLibrary();
mPixelScrollOverflow = 0;
}
/* Load and shutdown */
bool nsWinGesture::InitLibrary()
{
if (getGestureInfo) {
return true;
} else if (sLibraryHandle) {
return false;
}
sLibraryHandle = ::LoadLibraryW(kGestureLibraryName);
HMODULE hTheme = nsUXThemeData::GetThemeDLL();
// gesture interfaces
if (sLibraryHandle) {
getGestureInfo = (GetGestureInfoPtr)GetProcAddress(sLibraryHandle, "GetGestureInfo");
closeGestureInfoHandle = (CloseGestureInfoHandlePtr)GetProcAddress(sLibraryHandle, "CloseGestureInfoHandle");
getGestureExtraArgs = (GetGestureExtraArgsPtr)GetProcAddress(sLibraryHandle, "GetGestureExtraArgs");
setGestureConfig = (SetGestureConfigPtr)GetProcAddress(sLibraryHandle, "SetGestureConfig");
getGestureConfig = (GetGestureConfigPtr)GetProcAddress(sLibraryHandle, "GetGestureConfig");
registerTouchWindow = (RegisterTouchWindowPtr)GetProcAddress(sLibraryHandle, "RegisterTouchWindow");
unregisterTouchWindow = (UnregisterTouchWindowPtr)GetProcAddress(sLibraryHandle, "UnregisterTouchWindow");
getTouchInputInfo = (GetTouchInputInfoPtr)GetProcAddress(sLibraryHandle, "GetTouchInputInfo");
closeTouchInputHandle = (CloseTouchInputHandlePtr)GetProcAddress(sLibraryHandle, "CloseTouchInputHandle");
}
if (!getGestureInfo || !closeGestureInfoHandle || !getGestureExtraArgs ||
!setGestureConfig || !getGestureConfig) {
getGestureInfo = nsnull;
closeGestureInfoHandle = nsnull;
getGestureExtraArgs = nsnull;
setGestureConfig = nsnull;
getGestureConfig = nsnull;
return false;
}
if (!registerTouchWindow || !unregisterTouchWindow || !getTouchInputInfo || !closeTouchInputHandle) {
registerTouchWindow = nsnull;
unregisterTouchWindow = nsnull;
getTouchInputInfo = nsnull;
closeTouchInputHandle = nsnull;
}
// panning feedback interfaces
if (hTheme) {
beginPanningFeedback = (BeginPanningFeedbackPtr)GetProcAddress(hTheme, "BeginPanningFeedback");
endPanningFeedback = (EndPanningFeedbackPtr)GetProcAddress(hTheme, "EndPanningFeedback");
updatePanningFeedback = (UpdatePanningFeedbackPtr)GetProcAddress(hTheme, "UpdatePanningFeedback");
}
if (!beginPanningFeedback || !endPanningFeedback || !updatePanningFeedback) {
beginPanningFeedback = nsnull;
endPanningFeedback = nsnull;
updatePanningFeedback = nsnull;
}
// Check to see if we want single finger gesture input. Only do this once
// for the app so we don't have to look it up on every window create.
gEnableSingleFingerPanEvents =
Preferences::GetBool("gestures.enable_single_finger_input", false);
return true;
}
#define GCOUNT 5
bool nsWinGesture::SetWinGestureSupport(HWND hWnd, nsGestureNotifyEvent::ePanDirection aDirection)
{
if (!getGestureInfo)
return false;
GESTURECONFIG config[GCOUNT];
memset(&config, 0, sizeof(config));
config[0].dwID = GID_ZOOM;
config[0].dwWant = GC_ZOOM;
config[0].dwBlock = 0;
config[1].dwID = GID_ROTATE;
config[1].dwWant = GC_ROTATE;
config[1].dwBlock = 0;
config[2].dwID = GID_PAN;
config[2].dwWant = GC_PAN|GC_PAN_WITH_INERTIA|
GC_PAN_WITH_GUTTER;
config[2].dwBlock = GC_PAN_WITH_SINGLE_FINGER_VERTICALLY|
GC_PAN_WITH_SINGLE_FINGER_HORIZONTALLY;
if (gEnableSingleFingerPanEvents) {
if (aDirection == nsGestureNotifyEvent::ePanVertical ||
aDirection == nsGestureNotifyEvent::ePanBoth)
{
config[2].dwWant |= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
config[2].dwBlock -= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
}
if (aDirection == nsGestureNotifyEvent::ePanHorizontal ||
aDirection == nsGestureNotifyEvent::ePanBoth)
{
config[2].dwWant |= GC_PAN_WITH_SINGLE_FINGER_HORIZONTALLY;
config[2].dwBlock -= GC_PAN_WITH_SINGLE_FINGER_HORIZONTALLY;
}
}
config[3].dwWant = GC_TWOFINGERTAP;
config[3].dwID = GID_TWOFINGERTAP;
config[3].dwBlock = 0;
config[4].dwWant = GC_PRESSANDTAP;
config[4].dwID = GID_PRESSANDTAP;
config[4].dwBlock = 0;
return SetGestureConfig(hWnd, GCOUNT, (PGESTURECONFIG)&config);
}
/* Helpers */
bool nsWinGesture::IsAvailable()
{
return getGestureInfo != nsnull;
}
bool nsWinGesture::RegisterTouchWindow(HWND hWnd)
{
if (!registerTouchWindow)
return false;
return registerTouchWindow(hWnd, TWF_WANTPALM);
}
bool nsWinGesture::UnregisterTouchWindow(HWND hWnd)
{
if (!unregisterTouchWindow)
return false;
return unregisterTouchWindow(hWnd);
}
bool nsWinGesture::GetTouchInputInfo(HTOUCHINPUT hTouchInput, PRUint32 cInputs, PTOUCHINPUT pInputs)
{
if (!getTouchInputInfo)
return false;
return getTouchInputInfo(hTouchInput, cInputs, pInputs, sizeof(TOUCHINPUT));
}
bool nsWinGesture::CloseTouchInputHandle(HTOUCHINPUT hTouchInput)
{
if (!closeTouchInputHandle)
return false;
return closeTouchInputHandle(hTouchInput);
}
bool nsWinGesture::GetGestureInfo(HGESTUREINFO hGestureInfo, PGESTUREINFO pGestureInfo)
{
if (!getGestureInfo || !hGestureInfo || !pGestureInfo)
return false;
ZeroMemory(pGestureInfo, sizeof(GESTUREINFO));
pGestureInfo->cbSize = sizeof(GESTUREINFO);
return getGestureInfo(hGestureInfo, pGestureInfo);
}
bool nsWinGesture::CloseGestureInfoHandle(HGESTUREINFO hGestureInfo)
{
if (!getGestureInfo || !hGestureInfo)
return false;
return closeGestureInfoHandle(hGestureInfo);
}
bool nsWinGesture::GetGestureExtraArgs(HGESTUREINFO hGestureInfo, UINT cbExtraArgs, PBYTE pExtraArgs)
{
if (!getGestureInfo || !hGestureInfo || !pExtraArgs)
return false;
return getGestureExtraArgs(hGestureInfo, cbExtraArgs, pExtraArgs);
}
bool nsWinGesture::SetGestureConfig(HWND hWnd, UINT cIDs, PGESTURECONFIG pGestureConfig)
{
if (!getGestureInfo || !pGestureConfig)
return false;
return setGestureConfig(hWnd, 0, cIDs, pGestureConfig, sizeof(GESTURECONFIG));
}
bool nsWinGesture::GetGestureConfig(HWND hWnd, DWORD dwFlags, PUINT pcIDs, PGESTURECONFIG pGestureConfig)
{
if (!getGestureInfo || !pGestureConfig)
return false;
return getGestureConfig(hWnd, 0, dwFlags, pcIDs, pGestureConfig, sizeof(GESTURECONFIG));
}
bool nsWinGesture::BeginPanningFeedback(HWND hWnd)
{
if (!beginPanningFeedback)
return false;
return beginPanningFeedback(hWnd);
}
bool nsWinGesture::EndPanningFeedback(HWND hWnd)
{
if (!beginPanningFeedback)
return false;
return endPanningFeedback(hWnd, TRUE);
}
bool nsWinGesture::UpdatePanningFeedback(HWND hWnd, LONG offsetX, LONG offsetY, BOOL fInInertia)
{
if (!beginPanningFeedback)
return false;
return updatePanningFeedback(hWnd, offsetX, offsetY, fInInertia);
}
bool nsWinGesture::IsPanEvent(LPARAM lParam)
{
GESTUREINFO gi;
ZeroMemory(&gi,sizeof(GESTUREINFO));
gi.cbSize = sizeof(GESTUREINFO);
BOOL result = GetGestureInfo((HGESTUREINFO)lParam, &gi);
if (!result)
return false;
if (gi.dwID == GID_PAN)
return true;
return false;
}
/* Gesture event processing */
bool
nsWinGesture::ProcessGestureMessage(HWND hWnd, WPARAM wParam, LPARAM lParam, nsSimpleGestureEvent& evt)
{
GESTUREINFO gi;
ZeroMemory(&gi,sizeof(GESTUREINFO));
gi.cbSize = sizeof(GESTUREINFO);
BOOL result = GetGestureInfo((HGESTUREINFO)lParam, &gi);
if (!result)
return false;
// The coordinates of this event
nsPointWin coord;
coord = gi.ptsLocation;
coord.ScreenToClient(hWnd);
evt.refPoint.x = coord.x;
evt.refPoint.y = coord.y;
// Multiple gesture can occur at the same time so gesture state
// info can't be shared.
switch(gi.dwID)
{
case GID_BEGIN:
case GID_END:
// These should always fall through to DefWndProc
return false;
break;
case GID_ZOOM:
{
if (gi.dwFlags & GF_BEGIN) {
// Send a zoom start event
// The low 32 bits are the distance in pixels.
mZoomIntermediate = (float)gi.ullArguments;
evt.message = NS_SIMPLE_GESTURE_MAGNIFY_START;
evt.delta = 0.0;
}
else {
// Send a zoom intermediate/end event, the delta is the change
// in touch points.
evt.message = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
// (positive for a "zoom in")
evt.delta = -1.0 * (mZoomIntermediate - (float)gi.ullArguments);
mZoomIntermediate = (float)gi.ullArguments;
}
}
break;
case GID_ROTATE:
{
// Send a rotate start event
double radians = 0.0;
// On GF_BEGIN, ullArguments contains the absolute rotation at the
// start of the gesture. In later events it contains the offset from
// the start angle.
if (gi.ullArguments != 0)
radians = GID_ROTATE_ANGLE_FROM_ARGUMENT(gi.ullArguments);
double degrees = -1 * radians * (180/M_PI);
if (gi.dwFlags & GF_BEGIN) {
// At some point we should pass the initial angle in
// along with delta. It's useful.
degrees = mRotateIntermediate = 0.0;
}
evt.direction = 0;
evt.delta = degrees - mRotateIntermediate;
mRotateIntermediate = degrees;
if (evt.delta > 0)
evt.direction = nsIDOMSimpleGestureEvent::ROTATION_COUNTERCLOCKWISE;
else if (evt.delta < 0)
evt.direction = nsIDOMSimpleGestureEvent::ROTATION_CLOCKWISE;
if (gi.dwFlags & GF_BEGIN)
evt.message = NS_SIMPLE_GESTURE_ROTATE_START;
else if (gi.dwFlags & GF_END)
evt.message = NS_SIMPLE_GESTURE_ROTATE;
else
evt.message = NS_SIMPLE_GESTURE_ROTATE_UPDATE;
}
break;
case GID_TWOFINGERTAP:
{
// Normally maps to "restore" from whatever you may have recently changed. A simple
// double click.
evt.message = NS_SIMPLE_GESTURE_TAP;
}
break;
case GID_PRESSANDTAP:
{
// Two finger right click. Defaults to right click if it falls through.
evt.message = NS_SIMPLE_GESTURE_PRESSTAP;
}
break;
}
return true;
}
bool
nsWinGesture::ProcessPanMessage(HWND hWnd, WPARAM wParam, LPARAM lParam)
{
GESTUREINFO gi;
ZeroMemory(&gi,sizeof(GESTUREINFO));
gi.cbSize = sizeof(GESTUREINFO);
BOOL result = GetGestureInfo((HGESTUREINFO)lParam, &gi);
if (!result)
return false;
// The coordinates of this event
nsPointWin coord;
coord = mPanRefPoint = gi.ptsLocation;
// We want screen coordinates in our local offsets as client coordinates will change
// when feedback is taking place. Gui events though require client coordinates.
mPanRefPoint.ScreenToClient(hWnd);
switch(gi.dwID)
{
case GID_BEGIN:
case GID_END:
// These should always fall through to DefWndProc
return false;
break;
// Setup pixel scroll events for both axis
case GID_PAN:
{
if (gi.dwFlags & GF_BEGIN) {
mPanIntermediate = coord;
mPixelScrollDelta = 0;
mPanActive = true;
mPanInertiaActive = false;
}
else {
#ifdef DBG_jimm
PRInt32 deltaX = mPanIntermediate.x - coord.x;
PRInt32 deltaY = mPanIntermediate.y - coord.y;
PR_LOG(gWindowsLog, PR_LOG_ALWAYS,
("coordX=%d coordY=%d deltaX=%d deltaY=%d x:%d y:%d\n", coord.x,
coord.y, deltaX, deltaY, mXAxisFeedback, mYAxisFeedback));
#endif
mPixelScrollDelta.x = mPanIntermediate.x - coord.x;
mPixelScrollDelta.y = mPanIntermediate.y - coord.y;
mPanIntermediate = coord;
if (gi.dwFlags & GF_INERTIA)
mPanInertiaActive = true;
if (gi.dwFlags & GF_END) {
mPanActive = false;
mPanInertiaActive = false;
PanFeedbackFinalize(hWnd, true);
}
}
}
break;
}
return true;
}
inline bool TestTransition(PRInt32 a, PRInt32 b)
{
// If a is zero, overflow is zero, implying the cursor has moved back to the start position.
// If b is zero, cached overscroll is zero, implying feedback just begun.
if (a == 0 || b == 0) return true;
// Test for different signs.
return (a < 0) == (b < 0);
}
void
nsWinGesture::UpdatePanFeedbackX(HWND hWnd, PRInt32 scrollOverflow, bool& endFeedback)
{
// If scroll overflow was returned indicating we panned past the bounds of
// the scrollable view port, start feeback.
if (scrollOverflow != 0) {
if (!mFeedbackActive) {
BeginPanningFeedback(hWnd);
mFeedbackActive = true;
}
endFeedback = false;
mXAxisFeedback = true;
return;
}
if (mXAxisFeedback) {
PRInt32 newOverflow = mPixelScrollOverflow.x - mPixelScrollDelta.x;
// Detect a reverse transition past the starting drag point. This tells us the user
// has panned all the way back so we can stop providing feedback for this axis.
if (!TestTransition(newOverflow, mPixelScrollOverflow.x) || newOverflow == 0)
return;
// Cache the total over scroll in pixels.
mPixelScrollOverflow.x = newOverflow;
endFeedback = false;
}
}
void
nsWinGesture::UpdatePanFeedbackY(HWND hWnd, PRInt32 scrollOverflow, bool& endFeedback)
{
// If scroll overflow was returned indicating we panned past the bounds of
// the scrollable view port, start feeback.
if (scrollOverflow != 0) {
if (!mFeedbackActive) {
BeginPanningFeedback(hWnd);
mFeedbackActive = true;
}
endFeedback = false;
mYAxisFeedback = true;
return;
}
if (mYAxisFeedback) {
PRInt32 newOverflow = mPixelScrollOverflow.y - mPixelScrollDelta.y;
// Detect a reverse transition past the starting drag point. This tells us the user
// has panned all the way back so we can stop providing feedback for this axis.
if (!TestTransition(newOverflow, mPixelScrollOverflow.y) || newOverflow == 0)
return;
// Cache the total over scroll in pixels.
mPixelScrollOverflow.y = newOverflow;
endFeedback = false;
}
}
void
nsWinGesture::PanFeedbackFinalize(HWND hWnd, bool endFeedback)
{
if (!mFeedbackActive)
return;
if (endFeedback) {
mFeedbackActive = false;
mXAxisFeedback = false;
mYAxisFeedback = false;
mPixelScrollOverflow = 0;
EndPanningFeedback(hWnd);
return;
}
UpdatePanningFeedback(hWnd, mPixelScrollOverflow.x, mPixelScrollOverflow.y, mPanInertiaActive);
}
bool
nsWinGesture::PanDeltaToPixelScrollX(nsMouseScrollEvent& evt)
{
evt.delta = 0;
evt.scrollOverflow = 0;
// Don't scroll the view if we are currently at a bounds, or, if we are
// panning back from a max feedback position. This keeps the original drag point
// constant.
if (mXAxisFeedback)
return false;
if (mPixelScrollDelta.x != 0)
{
evt.scrollFlags = nsMouseScrollEvent::kIsHorizontal|
nsMouseScrollEvent::kHasPixels|
nsMouseScrollEvent::kNoLines|
nsMouseScrollEvent::kNoDefer;
evt.delta = mPixelScrollDelta.x;
evt.refPoint.x = mPanRefPoint.x;
evt.refPoint.y = mPanRefPoint.y;
return true;
}
return false;
}
bool
nsWinGesture::PanDeltaToPixelScrollY(nsMouseScrollEvent& evt)
{
evt.delta = 0;
evt.scrollOverflow = 0;
// Don't scroll the view if we are currently at a bounds, or, if we are
// panning back from a max feedback position. This keeps the original drag point
// constant.
if (mYAxisFeedback)
return false;
if (mPixelScrollDelta.y != 0)
{
evt.scrollFlags = nsMouseScrollEvent::kIsVertical|
nsMouseScrollEvent::kHasPixels|
nsMouseScrollEvent::kNoLines|
nsMouseScrollEvent::kNoDefer;
evt.delta = mPixelScrollDelta.y;
evt.refPoint.x = mPanRefPoint.x;
evt.refPoint.y = mPanRefPoint.y;
return true;
}
return false;
}