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Diffstat (limited to 'content/browser/renderer_host/input/touch_emulator.cc')
-rw-r--r--content/browser/renderer_host/input/touch_emulator.cc371
1 files changed, 0 insertions, 371 deletions
diff --git a/content/browser/renderer_host/input/touch_emulator.cc b/content/browser/renderer_host/input/touch_emulator.cc
deleted file mode 100644
index b0d43e2..0000000
--- a/content/browser/renderer_host/input/touch_emulator.cc
+++ /dev/null
@@ -1,371 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/browser/renderer_host/input/touch_emulator.h"
-
-#include "content/browser/renderer_host/input/motion_event_web.h"
-#include "content/browser/renderer_host/input/web_input_event_util.h"
-#include "content/public/common/content_client.h"
-#include "content/public/common/content_switches.h"
-#include "grit/content_resources.h"
-#include "third_party/WebKit/public/platform/WebCursorInfo.h"
-#include "ui/events/gesture_detection/gesture_config_helper.h"
-#include "ui/gfx/image/image.h"
-
-using blink::WebGestureEvent;
-using blink::WebInputEvent;
-using blink::WebKeyboardEvent;
-using blink::WebMouseEvent;
-using blink::WebMouseWheelEvent;
-using blink::WebTouchEvent;
-using blink::WebTouchPoint;
-
-namespace content {
-
-namespace {
-
-ui::GestureProvider::Config GetGestureProviderConfig() {
- // TODO(dgozman): Use different configs to emulate mobile/desktop as
- // requested by renderer.
- ui::GestureProvider::Config config = ui::DefaultGestureProviderConfig();
- config.gesture_begin_end_types_enabled = false;
- return config;
-}
-
-// Time between two consecutive mouse moves, during which second mouse move
-// is not converted to touch.
-const double kMouseMoveDropIntervalSeconds = 5.f / 1000;
-
-} // namespace
-
-TouchEmulator::TouchEmulator(TouchEmulatorClient* client)
- : client_(client),
- gesture_provider_(GetGestureProviderConfig(), this),
- enabled_(false),
- allow_pinch_(false) {
- DCHECK(client_);
- ResetState();
-
- InitCursorFromResource(&touch_cursor_, IDR_DEVTOOLS_TOUCH_CURSOR_ICON);
- InitCursorFromResource(&pinch_cursor_, IDR_DEVTOOLS_PINCH_CURSOR_ICON);
-
- WebCursor::CursorInfo cursor_info;
- cursor_info.type = blink::WebCursorInfo::TypePointer;
- pointer_cursor_.InitFromCursorInfo(cursor_info);
-
- // TODO(dgozman): Use synthetic secondary touch to support multi-touch.
- gesture_provider_.SetMultiTouchSupportEnabled(false);
- // TODO(dgozman): Enable double tap if requested by the renderer.
- // TODO(dgozman): Don't break double-tap-based pinch with shift handling.
- gesture_provider_.SetDoubleTapSupportForPlatformEnabled(false);
-}
-
-TouchEmulator::~TouchEmulator() {
- // We cannot cleanup properly in destructor, as we need roundtrip to the
- // renderer for ack. Instead, the owner should call Disable, and only
- // destroy this object when renderer is dead.
-}
-
-void TouchEmulator::ResetState() {
- last_mouse_event_was_move_ = false;
- last_mouse_move_timestamp_ = 0;
- mouse_pressed_ = false;
- shift_pressed_ = false;
- touch_active_ = false;
- suppress_next_fling_cancel_ = false;
- pinch_scale_ = 1.f;
- pinch_gesture_active_ = false;
-}
-
-void TouchEmulator::Enable(bool allow_pinch) {
- if (!enabled_) {
- enabled_ = true;
- ResetState();
- }
- allow_pinch_ = allow_pinch;
- UpdateCursor();
-}
-
-void TouchEmulator::Disable() {
- if (!enabled_)
- return;
-
- enabled_ = false;
- UpdateCursor();
- CancelTouch();
-}
-
-void TouchEmulator::InitCursorFromResource(WebCursor* cursor, int resource_id) {
- gfx::Image& cursor_image =
- content::GetContentClient()->GetNativeImageNamed(resource_id);
- WebCursor::CursorInfo cursor_info;
- cursor_info.type = blink::WebCursorInfo::TypeCustom;
- // TODO(dgozman): Add HiDPI cursors.
- cursor_info.image_scale_factor = 1.f;
- cursor_info.custom_image = cursor_image.AsBitmap();
- cursor_info.hotspot =
- gfx::Point(cursor_image.Width() / 2, cursor_image.Height() / 2);
-#if defined(OS_WIN)
- cursor_info.external_handle = 0;
-#endif
-
- cursor->InitFromCursorInfo(cursor_info);
-}
-
-bool TouchEmulator::HandleMouseEvent(const WebMouseEvent& mouse_event) {
- if (!enabled_)
- return false;
-
- if (mouse_event.button != WebMouseEvent::ButtonLeft)
- return true;
-
- if (mouse_event.type == WebInputEvent::MouseMove) {
- if (last_mouse_event_was_move_ &&
- mouse_event.timeStampSeconds < last_mouse_move_timestamp_ +
- kMouseMoveDropIntervalSeconds)
- return true;
-
- last_mouse_event_was_move_ = true;
- last_mouse_move_timestamp_ = mouse_event.timeStampSeconds;
- } else {
- last_mouse_event_was_move_ = false;
- }
-
- if (mouse_event.type == WebInputEvent::MouseDown)
- mouse_pressed_ = true;
- else if (mouse_event.type == WebInputEvent::MouseUp)
- mouse_pressed_ = false;
-
- UpdateShiftPressed((mouse_event.modifiers & WebInputEvent::ShiftKey) != 0);
-
- if (FillTouchEventAndPoint(mouse_event) &&
- gesture_provider_.OnTouchEvent(MotionEventWeb(touch_event_))) {
- client_->ForwardTouchEvent(touch_event_);
- }
-
- // Do not pass mouse events to the renderer.
- return true;
-}
-
-bool TouchEmulator::HandleMouseWheelEvent(const WebMouseWheelEvent& event) {
- if (!enabled_)
- return false;
-
- // No mouse wheel events for the renderer.
- return true;
-}
-
-bool TouchEmulator::HandleKeyboardEvent(const WebKeyboardEvent& event) {
- if (!enabled_)
- return false;
-
- if (!UpdateShiftPressed((event.modifiers & WebInputEvent::ShiftKey) != 0))
- return false;
-
- if (!mouse_pressed_)
- return false;
-
- // Note: The necessary pinch events will be lazily inserted by
- // |OnGestureEvent| depending on the state of |shift_pressed_|, using the
- // scroll stream as the event driver.
- if (shift_pressed_) {
- // TODO(dgozman): Add secondary touch point and set anchor.
- } else {
- // TODO(dgozman): Remove secondary touch point and anchor.
- }
-
- // Never block keyboard events.
- return false;
-}
-
-bool TouchEmulator::HandleTouchEventAck(InputEventAckState ack_result) {
- const bool event_consumed = ack_result == INPUT_EVENT_ACK_STATE_CONSUMED;
- gesture_provider_.OnTouchEventAck(event_consumed);
- // TODO(dgozman): Disable emulation when real touch events are available.
- return true;
-}
-
-void TouchEmulator::OnGestureEvent(const ui::GestureEventData& gesture) {
- WebGestureEvent gesture_event =
- CreateWebGestureEventFromGestureEventData(gesture);
-
- switch (gesture_event.type) {
- case WebInputEvent::GestureScrollBegin:
- client_->ForwardGestureEvent(gesture_event);
- // PinchBegin must always follow ScrollBegin.
- if (InPinchGestureMode())
- PinchBegin(gesture_event);
- break;
-
- case WebInputEvent::GestureScrollUpdate:
- if (InPinchGestureMode()) {
- // Convert scrolls to pinches while shift is pressed.
- if (!pinch_gesture_active_)
- PinchBegin(gesture_event);
- else
- PinchUpdate(gesture_event);
- } else {
- // Pass scroll update further. If shift was released, end the pinch.
- if (pinch_gesture_active_)
- PinchEnd(gesture_event);
- client_->ForwardGestureEvent(gesture_event);
- }
- break;
-
- case WebInputEvent::GestureScrollEnd:
- // PinchEnd must precede ScrollEnd.
- if (pinch_gesture_active_)
- PinchEnd(gesture_event);
- client_->ForwardGestureEvent(gesture_event);
- break;
-
- case WebInputEvent::GestureFlingStart:
- // PinchEnd must precede FlingStart.
- if (pinch_gesture_active_)
- PinchEnd(gesture_event);
- if (InPinchGestureMode()) {
- // No fling in pinch mode. Forward scroll end instead of fling start.
- suppress_next_fling_cancel_ = true;
- ScrollEnd(gesture_event);
- } else {
- suppress_next_fling_cancel_ = false;
- client_->ForwardGestureEvent(gesture_event);
- }
- break;
-
- case WebInputEvent::GestureFlingCancel:
- // If fling start was suppressed, we should not send fling cancel either.
- if (!suppress_next_fling_cancel_)
- client_->ForwardGestureEvent(gesture_event);
- suppress_next_fling_cancel_ = false;
- break;
-
- default:
- // Everything else goes through.
- client_->ForwardGestureEvent(gesture_event);
- }
-}
-
-void TouchEmulator::CancelTouch() {
- if (!touch_active_)
- return;
-
- touch_event_.timeStampSeconds =
- (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();
- touch_event_.type = WebInputEvent::TouchCancel;
- touch_event_.touches[0].state = WebTouchPoint::StateCancelled;
- touch_active_ = false;
- if (gesture_provider_.OnTouchEvent(MotionEventWeb(touch_event_)))
- client_->ForwardTouchEvent(touch_event_);
-}
-
-void TouchEmulator::UpdateCursor() {
- if (!enabled_)
- client_->SetCursor(pointer_cursor_);
- else
- client_->SetCursor(InPinchGestureMode() ? pinch_cursor_ : touch_cursor_);
-}
-
-bool TouchEmulator::UpdateShiftPressed(bool shift_pressed) {
- if (shift_pressed_ == shift_pressed)
- return false;
- shift_pressed_ = shift_pressed;
- UpdateCursor();
- return true;
-}
-
-void TouchEmulator::PinchBegin(const WebGestureEvent& event) {
- DCHECK(InPinchGestureMode());
- DCHECK(!pinch_gesture_active_);
- pinch_gesture_active_ = true;
- pinch_anchor_ = gfx::Point(event.x, event.y);
- pinch_scale_ = 1.f;
- FillPinchEvent(event);
- pinch_event_.type = WebInputEvent::GesturePinchBegin;
- client_->ForwardGestureEvent(pinch_event_);
-}
-
-void TouchEmulator::PinchUpdate(const WebGestureEvent& event) {
- DCHECK(pinch_gesture_active_);
- int dy = pinch_anchor_.y() - event.y;
- float scale = exp(dy * 0.002f);
- FillPinchEvent(event);
- pinch_event_.type = WebInputEvent::GesturePinchUpdate;
- pinch_event_.data.pinchUpdate.scale = scale / pinch_scale_;
- client_->ForwardGestureEvent(pinch_event_);
- pinch_scale_ = scale;
-}
-
-void TouchEmulator::PinchEnd(const WebGestureEvent& event) {
- DCHECK(pinch_gesture_active_);
- pinch_gesture_active_ = false;
- FillPinchEvent(event);
- pinch_event_.type = WebInputEvent::GesturePinchEnd;
- client_->ForwardGestureEvent(pinch_event_);
-}
-
-void TouchEmulator::FillPinchEvent(const WebInputEvent& event) {
- pinch_event_.timeStampSeconds = event.timeStampSeconds;
- pinch_event_.modifiers = event.modifiers;
- pinch_event_.sourceDevice = blink::WebGestureEvent::Touchscreen;
- pinch_event_.x = pinch_anchor_.x();
- pinch_event_.y = pinch_anchor_.y();
-}
-
-void TouchEmulator::ScrollEnd(const WebGestureEvent& event) {
- WebGestureEvent scroll_event;
- scroll_event.timeStampSeconds = event.timeStampSeconds;
- scroll_event.modifiers = event.modifiers;
- scroll_event.sourceDevice = blink::WebGestureEvent::Touchscreen;
- scroll_event.type = WebInputEvent::GestureScrollEnd;
- client_->ForwardGestureEvent(scroll_event);
-}
-
-bool TouchEmulator::FillTouchEventAndPoint(const WebMouseEvent& mouse_event) {
- if (mouse_event.type != WebInputEvent::MouseDown &&
- mouse_event.type != WebInputEvent::MouseMove &&
- mouse_event.type != WebInputEvent::MouseUp) {
- return false;
- }
-
- touch_event_.touchesLength = 1;
- touch_event_.timeStampSeconds = mouse_event.timeStampSeconds;
- touch_event_.modifiers = mouse_event.modifiers;
-
- WebTouchPoint& point = touch_event_.touches[0];
- point.id = 0;
- point.radiusX = point.radiusY = 1.f;
- point.force = 1.f;
- point.rotationAngle = 0.f;
- point.position.x = mouse_event.x;
- point.screenPosition.x = mouse_event.globalX;
- point.position.y = mouse_event.y;
- point.screenPosition.y = mouse_event.globalY;
-
- switch (mouse_event.type) {
- case WebInputEvent::MouseDown:
- touch_event_.type = WebInputEvent::TouchStart;
- touch_active_ = true;
- point.state = WebTouchPoint::StatePressed;
- break;
- case WebInputEvent::MouseMove:
- touch_event_.type = WebInputEvent::TouchMove;
- point.state = WebTouchPoint::StateMoved;
- break;
- case WebInputEvent::MouseUp:
- touch_event_.type = WebInputEvent::TouchEnd;
- touch_active_ = false;
- point.state = WebTouchPoint::StateReleased;
- break;
- default:
- NOTREACHED();
- }
- return true;
-}
-
-bool TouchEmulator::InPinchGestureMode() const {
- return shift_pressed_ && allow_pinch_;
-}
-
-} // namespace content
generated by cgit v1.1 at 2025-05-13 18:14:18 +0000