Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 388 insertions, 0 deletions

diff --git a/widget/windows/nsWinGesture.cpp b/widget/windows/nsWinGesture.cpp
new file mode 100644
index 0000000000..8fd00b3ff0
--- /dev/null
+++ b/widget/windows/nsWinGesture.cpp
@@ -0,0 +1,388 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * nsWinGesture - Touch input handling for tablet displays.
+ */
+
+#include "nscore.h"
+#include "nsWinGesture.h"
+#include "nsUXThemeData.h"
+#include "mozilla/Logging.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/TouchEvents.h"
+#include "mozilla/dom/SimpleGestureEventBinding.h"
+#include "mozilla/dom/WheelEventBinding.h"
+
+#include <cmath>
+
+using namespace mozilla;
+using namespace mozilla::widget;
+
+extern mozilla::LazyLogModule gWindowsLog;
+
+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() {
+  // 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, WidgetGestureNotifyEvent::PanDirection aDirection) {
+  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 == WidgetGestureNotifyEvent::ePanVertical ||
+        aDirection == WidgetGestureNotifyEvent::ePanBoth) {
+      config[2].dwWant |= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
+      config[2].dwBlock -= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
+    }
+
+    if (aDirection == WidgetGestureNotifyEvent::ePanHorizontal ||
+        aDirection == WidgetGestureNotifyEvent::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, 0, GCOUNT, (PGESTURECONFIG)&config,
+                          sizeof(GESTURECONFIG));
+}
+
+/* Helpers */
+
+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,
+                                         WidgetSimpleGestureEvent& 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.mRefPoint = LayoutDeviceIntPoint(coord.x, 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.mMessage = eMagnifyGestureStart;
+        evt.mDelta = 0.0;
+      } else if (gi.dwFlags & GF_END) {
+        // Send a zoom end event, the delta is the change
+        // in touch points.
+        evt.mMessage = eMagnifyGesture;
+        // (positive for a "zoom in")
+        evt.mDelta = -1.0 * (mZoomIntermediate - (float)gi.ullArguments);
+        mZoomIntermediate = (float)gi.ullArguments;
+      } else {
+        // Send a zoom intermediate event, the delta is the change
+        // in touch points.
+        evt.mMessage = eMagnifyGestureUpdate;
+        // (positive for a "zoom in")
+        evt.mDelta = -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.mDirection = 0;
+      evt.mDelta = degrees - mRotateIntermediate;
+      mRotateIntermediate = degrees;
+
+      if (evt.mDelta > 0) {
+        evt.mDirection =
+            dom::SimpleGestureEvent_Binding::ROTATION_COUNTERCLOCKWISE;
+      } else if (evt.mDelta < 0) {
+        evt.mDirection = dom::SimpleGestureEvent_Binding::ROTATION_CLOCKWISE;
+      }
+
+      if (gi.dwFlags & GF_BEGIN) {
+        evt.mMessage = eRotateGestureStart;
+      } else if (gi.dwFlags & GF_END) {
+        evt.mMessage = eRotateGesture;
+      } else {
+        evt.mMessage = eRotateGestureUpdate;
+      }
+    } break;
+
+    case GID_TWOFINGERTAP:
+      // Normally maps to "restore" from whatever you may have recently changed.
+      // A simple double click.
+      evt.mMessage = eTapGesture;
+      evt.mClickCount = 1;
+      break;
+
+    case GID_PRESSANDTAP:
+      // Two finger right click. Defaults to right click if it falls through.
+      evt.mMessage = ePressTapGesture;
+      evt.mClickCount = 1;
+      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
+        int32_t deltaX = mPanIntermediate.x - coord.x;
+        int32_t deltaY = mPanIntermediate.y - coord.y;
+        MOZ_LOG(gWindowsLog, LogLevel::Info,
+                ("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(int32_t a, int32_t 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, int32_t 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) {
+    int32_t 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, int32_t 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) {
+    int32_t 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, TRUE);
+    return;
+  }
+
+  UpdatePanningFeedback(hWnd, mPixelScrollOverflow.x, mPixelScrollOverflow.y,
+                        mPanInertiaActive);
+}
+
+bool nsWinGesture::PanDeltaToPixelScroll(WidgetWheelEvent& aWheelEvent) {
+  aWheelEvent.mDeltaX = aWheelEvent.mDeltaY = aWheelEvent.mDeltaZ = 0.0;
+  aWheelEvent.mLineOrPageDeltaX = aWheelEvent.mLineOrPageDeltaY = 0;
+
+  aWheelEvent.mRefPoint = LayoutDeviceIntPoint(mPanRefPoint.x, mPanRefPoint.y);
+  aWheelEvent.mDeltaMode = dom::WheelEvent_Binding::DOM_DELTA_PIXEL;
+  aWheelEvent.mScrollType = WidgetWheelEvent::SCROLL_SYNCHRONOUSLY;
+  aWheelEvent.mIsNoLineOrPageDelta = true;
+
+  aWheelEvent.mOverflowDeltaX = 0.0;
+  aWheelEvent.mOverflowDeltaY = 0.0;
+
+  // 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) {
+    aWheelEvent.mDeltaX = mPixelScrollDelta.x;
+  }
+  if (!mYAxisFeedback) {
+    aWheelEvent.mDeltaY = mPixelScrollDelta.y;
+  }
+
+  return (aWheelEvent.mDeltaX != 0 || aWheelEvent.mDeltaY != 0);
+}