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implement Touchevent prevent default behavior (#35031)
* implement Touchevent prevent default behavior * The status change logic of the `TouchHandler` is changed. > The `WaitingForScript` state is canceled. TouchAction can be identified based on the current touch type and numbers if touch points. * Sends current event to script thread along with recognized `TouchAction`. > After dispatch event, script thread sends a `TouchEventProcess(EventResult)` message to main thread. If the event is set to `DefaultAllowed`, the corresponding `TouchAction` information is added. * After receiving `DefaultAllowed(TouchAction)` message, main thread executes corresponding action. > `DefaultPrevented(TouchEventType)` is received. Use `prevent_click` to mark that the default `Click` is blocked, and `prevent_move` to mark that the default `Scroll` and `Zoom` are blocked. In this way, all TouchActions implement preventDefault. Signed-off-by: Bi Fuguo <1782765876@qq.com> * fix some suggestions * support preventDefault fling * move `TouchAction` to share touch directory * check preventDefault everytime when touch * fix zoom ineffective Signed-off-by: Bi Fuguo <1782765876@qq.com> * fix some suggestions rename on_event_processed to on_touch_event_processed clear unused features Signed-off-by: Bi Fuguo <1782765876@qq.com> * Optimizes pan performance by continuously sliding without waiting for the eventhandler. Signed-off-by: kongbai1996 <1782765876@qq.com> * resolve conflict Signed-off-by: kongbai1996 <1782765876@qq.com> --------- Signed-off-by: Bi Fuguo <1782765876@qq.com> Signed-off-by: kongbai1996 <1782765876@qq.com>
This commit is contained in:
Bi Fuguo
GitHub
parent
6dce329acc
commit
3fe42a0b5a
12 changed files with 273 additions and 255 deletions
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@ -21,7 +21,7 @@ use compositing_traits::{
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use crossbeam_channel::Sender;
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use embedder_traits::{
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Cursor, InputEvent, MouseButton, MouseButtonAction, MouseButtonEvent, MouseMoveEvent,
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TouchEvent, TouchEventAction, TouchId,
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TouchAction, TouchEvent, TouchEventType, TouchId,
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};
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use euclid::{Point2D, Rect, Scale, Size2D, Transform3D, Vector2D};
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use fnv::{FnvHashMap, FnvHashSet};
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@ -33,8 +33,8 @@ use pixels::{CorsStatus, Image, PixelFormat};
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use profile_traits::time::{self as profile_time, ProfilerCategory};
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use profile_traits::time_profile;
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use script_traits::{
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AnimationState, AnimationTickType, ScriptThreadMessage, ScrollState, WindowSizeData,
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WindowSizeType,
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AnimationState, AnimationTickType, EventResult, ScriptThreadMessage, ScrollState,
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WindowSizeData, WindowSizeType,
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};
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use servo_geometry::DeviceIndependentPixel;
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use style_traits::{CSSPixel, PinchZoomFactor};
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@ -56,7 +56,7 @@ use webrender_traits::{
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CompositorHitTestResult, CrossProcessCompositorMessage, ImageUpdate, UntrustedNodeAddress,
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};
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use crate::touch::{TouchAction, TouchHandler};
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use crate::touch::TouchHandler;
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use crate::webview::{UnknownWebView, WebView, WebViewAlreadyExists, WebViewManager};
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use crate::windowing::{self, EmbedderCoordinates, WebRenderDebugOption, WindowMethods};
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use crate::InitialCompositorState;
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@ -501,7 +501,7 @@ impl IOCompositor {
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},
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CompositorMsg::TouchEventProcessed(result) => {
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self.touch_handler.on_event_processed(result);
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self.on_touch_event_processed(result);
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},
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CompositorMsg::CreatePng(page_rect, reply) => {
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@ -1338,13 +1338,28 @@ impl IOCompositor {
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InputEvent::MouseButton(event) => {
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match event.action {
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MouseButtonAction::Click => {},
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MouseButtonAction::Down => self.on_touch_down(TouchId(0), event.point),
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MouseButtonAction::Up => self.on_touch_up(TouchId(0), event.point),
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MouseButtonAction::Down => self.on_touch_down(TouchEvent {
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event_type: TouchEventType::Down,
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id: TouchId(0),
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point: event.point,
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action: TouchAction::NoAction,
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}),
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MouseButtonAction::Up => self.on_touch_up(TouchEvent {
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event_type: TouchEventType::Up,
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id: TouchId(0),
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point: event.point,
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action: TouchAction::NoAction,
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}),
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}
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return;
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},
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InputEvent::MouseMove(event) => {
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self.on_touch_move(TouchId(0), event.point);
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self.on_touch_move(TouchEvent {
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event_type: TouchEventType::Move,
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id: TouchId(0),
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point: event.point,
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action: TouchAction::NoAction,
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});
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return;
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},
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_ => {},
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@ -1422,75 +1437,113 @@ impl IOCompositor {
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return;
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}
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match event.action {
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TouchEventAction::Down => self.on_touch_down(event.id, event.point),
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TouchEventAction::Move => self.on_touch_move(event.id, event.point),
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TouchEventAction::Up => self.on_touch_up(event.id, event.point),
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TouchEventAction::Cancel => self.on_touch_cancel(event.id, event.point),
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match event.event_type {
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TouchEventType::Down => self.on_touch_down(event),
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TouchEventType::Move => self.on_touch_move(event),
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TouchEventType::Up => self.on_touch_up(event),
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TouchEventType::Cancel => self.on_touch_cancel(event),
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}
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}
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fn on_touch_down(&mut self, id: TouchId, point: DevicePoint) {
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self.touch_handler.on_touch_down(id, point);
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self.send_touch_event(TouchEvent {
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action: TouchEventAction::Down,
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id,
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point,
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})
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fn on_touch_down(&mut self, event: TouchEvent) {
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self.touch_handler.on_touch_down(event.id, event.point);
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self.send_touch_event(event);
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}
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fn on_touch_move(&mut self, id: TouchId, point: DevicePoint) {
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match self.touch_handler.on_touch_move(id, point) {
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TouchAction::Scroll(delta) => self.on_scroll_window_event(
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ScrollLocation::Delta(LayoutVector2D::from_untyped(delta.to_untyped())),
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point.cast(),
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),
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TouchAction::Zoom(magnification, scroll_delta) => {
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let cursor = Point2D::new(-1, -1); // Make sure this hits the base layer.
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fn on_touch_move(&mut self, mut event: TouchEvent) {
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let action: TouchAction = self.touch_handler.on_touch_move(event.id, event.point);
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if TouchAction::NoAction != action {
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if !self.touch_handler.prevent_move {
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match action {
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TouchAction::Scroll(delta, point) => self.on_scroll_window_event(
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ScrollLocation::Delta(LayoutVector2D::from_untyped(delta.to_untyped())),
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point.cast(),
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),
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TouchAction::Zoom(magnification, scroll_delta) => {
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let cursor = Point2D::new(-1, -1); // Make sure this hits the base layer.
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// The order of these events doesn't matter, because zoom is handled by
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// a root display list and the scroll event here is handled by the scroll
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// applied to the content display list.
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self.pending_scroll_zoom_events
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.push(ScrollZoomEvent::PinchZoom(magnification));
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self.pending_scroll_zoom_events
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.push(ScrollZoomEvent::Scroll(ScrollEvent {
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scroll_location: ScrollLocation::Delta(LayoutVector2D::from_untyped(
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scroll_delta.to_untyped(),
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)),
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cursor,
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event_count: 1,
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}));
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},
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TouchAction::DispatchEvent => self.send_touch_event(TouchEvent {
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action: TouchEventAction::Move,
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id,
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point,
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}),
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_ => {},
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// The order of these events doesn't matter, because zoom is handled by
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// a root display list and the scroll event here is handled by the scroll
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// applied to the content display list.
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self.pending_scroll_zoom_events
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.push(ScrollZoomEvent::PinchZoom(magnification));
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self.pending_scroll_zoom_events
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.push(ScrollZoomEvent::Scroll(ScrollEvent {
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scroll_location: ScrollLocation::Delta(
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LayoutVector2D::from_untyped(scroll_delta.to_untyped()),
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),
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cursor,
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event_count: 1,
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}));
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},
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_ => {},
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}
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} else {
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event.action = action;
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}
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self.send_touch_event(event);
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}
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}
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fn on_touch_up(&mut self, id: TouchId, point: DevicePoint) {
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self.send_touch_event(TouchEvent {
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action: TouchEventAction::Up,
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id,
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point,
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});
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if let TouchAction::Click = self.touch_handler.on_touch_up(id, point) {
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self.simulate_mouse_click(point);
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}
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fn on_touch_up(&mut self, mut event: TouchEvent) {
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let action = self.touch_handler.on_touch_up(event.id, event.point);
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event.action = action;
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self.send_touch_event(event);
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}
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fn on_touch_cancel(&mut self, id: TouchId, point: DevicePoint) {
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fn on_touch_cancel(&mut self, event: TouchEvent) {
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// Send the event to script.
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self.touch_handler.on_touch_cancel(id, point);
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self.send_touch_event(TouchEvent {
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action: TouchEventAction::Cancel,
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id,
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point,
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})
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self.touch_handler.on_touch_cancel(event.id, event.point);
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self.send_touch_event(event)
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}
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fn on_touch_event_processed(&mut self, result: EventResult) {
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match result {
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EventResult::DefaultPrevented(event_type) => {
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match event_type {
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TouchEventType::Down | TouchEventType::Move => {
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self.touch_handler.prevent_move = true;
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},
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_ => {},
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}
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self.touch_handler.prevent_click = true;
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},
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EventResult::DefaultAllowed(action) => {
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self.touch_handler.prevent_move = false;
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match action {
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TouchAction::Click(point) => {
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if !self.touch_handler.prevent_click {
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self.simulate_mouse_click(point);
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}
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},
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TouchAction::Flinging(velocity, point) => {
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self.touch_handler.on_fling(velocity, point);
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},
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TouchAction::Scroll(delta, point) => self.on_scroll_window_event(
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ScrollLocation::Delta(LayoutVector2D::from_untyped(delta.to_untyped())),
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point.cast(),
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),
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TouchAction::Zoom(magnification, scroll_delta) => {
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let cursor = Point2D::new(-1, -1); // Make sure this hits the base layer.
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// The order of these events doesn't matter, because zoom is handled by
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// a root display list and the scroll event here is handled by the scroll
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// applied to the content display list.
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self.pending_scroll_zoom_events
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.push(ScrollZoomEvent::PinchZoom(magnification));
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self.pending_scroll_zoom_events
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.push(ScrollZoomEvent::Scroll(ScrollEvent {
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scroll_location: ScrollLocation::Delta(
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LayoutVector2D::from_untyped(scroll_delta.to_untyped()),
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),
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cursor,
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event_count: 1,
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}));
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},
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_ => {},
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}
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},
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}
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}
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/// <http://w3c.github.io/touch-events/#mouse-events>
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@ -1518,18 +1571,18 @@ impl IOCompositor {
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&mut self,
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scroll_location: ScrollLocation,
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cursor: DeviceIntPoint,
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action: TouchEventAction,
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event_type: TouchEventType,
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) {
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if self.shutdown_state != ShutdownState::NotShuttingDown {
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return;
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}
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match action {
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TouchEventAction::Move => self.on_scroll_window_event(scroll_location, cursor),
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TouchEventAction::Up | TouchEventAction::Cancel => {
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match event_type {
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TouchEventType::Move => self.on_scroll_window_event(scroll_location, cursor),
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TouchEventType::Up | TouchEventType::Cancel => {
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self.on_scroll_window_event(scroll_location, cursor);
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},
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TouchEventAction::Down => {
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TouchEventType::Down => {
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self.on_scroll_window_event(scroll_location, cursor);
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},
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}
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@ -2,10 +2,9 @@
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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 https://mozilla.org/MPL/2.0/. */
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use embedder_traits::TouchId;
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use embedder_traits::{TouchAction, TouchId};
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use euclid::{Point2D, Scale, Vector2D};
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use log::{debug, warn};
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use script_traits::EventResult;
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use webrender_api::units::{DeviceIntPoint, DevicePixel, LayoutVector2D};
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use self::TouchState::*;
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@ -25,6 +24,8 @@ const FLING_MAX_SCREEN_PX: f32 = 4000.0;
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pub struct TouchHandler {
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pub state: TouchState,
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pub active_touch_points: Vec<TouchPoint>,
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pub prevent_move: bool,
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pub prevent_click: bool,
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}
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#[derive(Clone, Copy, Debug)]
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@ -44,11 +45,6 @@ impl TouchPoint {
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pub enum TouchState {
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/// Not tracking any touch point
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Nothing,
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/// A touchstart event was dispatched to the page, but the response wasn't received yet.
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/// Contains the initial touch point.
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WaitingForScript,
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/// Script is consuming the current touch sequence; don't perform default actions.
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DefaultPrevented,
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/// A single touch point is active and may perform click or pan default actions.
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/// Contains the initial touch location.
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Touching,
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@ -67,21 +63,6 @@ pub enum TouchState {
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MultiTouch,
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}
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/// The action to take in response to a touch event
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#[derive(Clone, Copy, Debug)]
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pub enum TouchAction {
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/// Simulate a mouse click.
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Click,
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/// Scroll by the provided offset.
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Scroll(Vector2D<f32, DevicePixel>),
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/// Zoom by a magnification factor and scroll by the provided offset.
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Zoom(f32, Vector2D<f32, DevicePixel>),
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/// Send a JavaScript event to content.
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DispatchEvent,
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/// Don't do anything.
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NoAction,
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}
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pub(crate) struct FlingAction {
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pub delta: LayoutVector2D,
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pub cursor: DeviceIntPoint,
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@ -92,20 +73,21 @@ impl TouchHandler {
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TouchHandler {
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state: Nothing,
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active_touch_points: Vec::new(),
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prevent_move: true,
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prevent_click: false,
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}
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}
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pub fn on_touch_down(&mut self, id: TouchId, point: Point2D<f32, DevicePixel>) {
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let point = TouchPoint::new(id, point);
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self.active_touch_points.push(point);
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self.state = match self.state {
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Nothing => WaitingForScript,
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Flinging { .. } => Touching,
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Touching | Panning { .. } => Pinching,
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WaitingForScript => WaitingForScript,
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DefaultPrevented => DefaultPrevented,
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Pinching | MultiTouch => MultiTouch,
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self.state = Touching;
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self.prevent_click = match self.touch_count() {
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1 => {
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self.prevent_move = true;
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false
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},
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_ => true,
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};
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}
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@ -140,51 +122,51 @@ impl TouchHandler {
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},
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};
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let old_point = self.active_touch_points[idx].point;
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let delta = point - old_point;
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let action = match self.state {
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Touching => {
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let delta = point - old_point;
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if delta.x.abs() > TOUCH_PAN_MIN_SCREEN_PX ||
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let action = match self.touch_count() {
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1 => {
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if let Panning { ref mut velocity } = self.state {
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// TODO: Probably we should track 1-3 more points and use a smarter algorithm
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*velocity += delta;
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*velocity /= 2.0;
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TouchAction::Scroll(delta, point)
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} else if delta.x.abs() > TOUCH_PAN_MIN_SCREEN_PX ||
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delta.y.abs() > TOUCH_PAN_MIN_SCREEN_PX
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{
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self.state = Panning {
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velocity: Vector2D::new(delta.x, delta.y),
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};
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TouchAction::Scroll(delta)
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self.prevent_click = true;
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TouchAction::Scroll(delta, point)
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} else {
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TouchAction::NoAction
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}
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},
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Panning { ref mut velocity } => {
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let delta = point - old_point;
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// TODO: Probably we should track 1-3 more points and use a smarter algorithm
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*velocity += delta;
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*velocity /= 2.0;
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TouchAction::Scroll(delta)
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2 => {
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if self.state == Pinching ||
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delta.x.abs() > TOUCH_PAN_MIN_SCREEN_PX ||
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delta.y.abs() > TOUCH_PAN_MIN_SCREEN_PX
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{
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self.state = Pinching;
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let (d0, c0) = self.pinch_distance_and_center();
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self.active_touch_points[idx].point = point;
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let (d1, c1) = self.pinch_distance_and_center();
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let magnification = d1 / d0;
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let scroll_delta = c1 - c0 * Scale::new(magnification);
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TouchAction::Zoom(magnification, scroll_delta)
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} else {
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TouchAction::NoAction
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}
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},
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Flinging { .. } => {
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unreachable!("Touch Move event received without preceding down.")
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_ => {
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self.state = MultiTouch;
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TouchAction::NoAction
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},
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DefaultPrevented => TouchAction::DispatchEvent,
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Pinching => {
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let (d0, c0) = self.pinch_distance_and_center();
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self.active_touch_points[idx].point = point;
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let (d1, c1) = self.pinch_distance_and_center();
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let magnification = d1 / d0;
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let scroll_delta = c1 - c0 * Scale::new(magnification);
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TouchAction::Zoom(magnification, scroll_delta)
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},
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WaitingForScript => TouchAction::NoAction,
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MultiTouch => TouchAction::NoAction,
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Nothing => unreachable!(),
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};
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// If we're still waiting to see whether this is a click or pan, remember the original
|
||||
// location. Otherwise, update the touch point with the latest location.
|
||||
if self.state != Touching && self.state != WaitingForScript {
|
||||
// update the touch point with the latest location.
|
||||
if self.state != Touching {
|
||||
self.active_touch_points[idx].point = point;
|
||||
}
|
||||
action
|
||||
|
|
@ -198,56 +180,37 @@ impl TouchHandler {
|
|||
None
|
||||
},
|
||||
};
|
||||
match self.state {
|
||||
Touching => {
|
||||
// FIXME: If the duration exceeds some threshold, send a contextmenu event instead.
|
||||
// FIXME: Don't send a click if preventDefault is called on the touchend event.
|
||||
self.state = Nothing;
|
||||
TouchAction::Click
|
||||
},
|
||||
Nothing => {
|
||||
self.state = Nothing;
|
||||
TouchAction::NoAction
|
||||
},
|
||||
Panning { velocity } if velocity.length().abs() >= FLING_MIN_SCREEN_PX => {
|
||||
// TODO: point != old. Not sure which one is better to take as cursor for flinging.
|
||||
debug!(
|
||||
"Transitioning to Fling. Cursor is {point:?}. Old cursor was {old:?}. \
|
||||
Raw velocity is {velocity:?}."
|
||||
);
|
||||
debug_assert!((point.x as i64) < (i32::MAX as i64));
|
||||
debug_assert!((point.y as i64) < (i32::MAX as i64));
|
||||
let cursor = DeviceIntPoint::new(point.x as i32, point.y as i32);
|
||||
// Multiplying the initial velocity gives the fling a much more snappy feel
|
||||
// and serves well as a poor-mans acceleration algorithm.
|
||||
let velocity = (velocity * 2.0).with_max_length(FLING_MAX_SCREEN_PX);
|
||||
self.state = Flinging { velocity, cursor };
|
||||
TouchAction::NoAction
|
||||
},
|
||||
Panning { .. } => {
|
||||
self.state = Nothing;
|
||||
TouchAction::NoAction
|
||||
},
|
||||
Pinching => {
|
||||
self.state = Panning {
|
||||
velocity: Vector2D::new(0.0, 0.0),
|
||||
};
|
||||
TouchAction::NoAction
|
||||
},
|
||||
Flinging { .. } => {
|
||||
unreachable!("On touchup received, but already flinging.")
|
||||
},
|
||||
WaitingForScript => {
|
||||
if self.active_touch_points.is_empty() {
|
||||
match self.touch_count() {
|
||||
0 => {
|
||||
if let Panning { velocity } = self.state {
|
||||
if velocity.length().abs() >= FLING_MIN_SCREEN_PX {
|
||||
// TODO: point != old. Not sure which one is better to take as cursor for flinging.
|
||||
debug!(
|
||||
"Transitioning to Fling. Cursor is {point:?}. Old cursor was {old:?}. \
|
||||
Raw velocity is {velocity:?}."
|
||||
);
|
||||
debug_assert!((point.x as i64) < (i32::MAX as i64));
|
||||
debug_assert!((point.y as i64) < (i32::MAX as i64));
|
||||
let cursor = DeviceIntPoint::new(point.x as i32, point.y as i32);
|
||||
// Multiplying the initial velocity gives the fling a much more snappy feel
|
||||
// and serves well as a poor-mans acceleration algorithm.
|
||||
let velocity = (velocity * 2.0).with_max_length(FLING_MAX_SCREEN_PX);
|
||||
TouchAction::Flinging(velocity, cursor)
|
||||
} else {
|
||||
self.state = Nothing;
|
||||
TouchAction::NoAction
|
||||
}
|
||||
} else {
|
||||
self.state = Nothing;
|
||||
return TouchAction::Click;
|
||||
if !self.prevent_click {
|
||||
TouchAction::Click(point)
|
||||
} else {
|
||||
TouchAction::NoAction
|
||||
}
|
||||
}
|
||||
TouchAction::NoAction
|
||||
},
|
||||
DefaultPrevented | MultiTouch => {
|
||||
if self.active_touch_points.is_empty() {
|
||||
self.state = Nothing;
|
||||
}
|
||||
_ => {
|
||||
self.state = Touching;
|
||||
TouchAction::NoAction
|
||||
},
|
||||
}
|
||||
|
|
@ -263,35 +226,11 @@ impl TouchHandler {
|
|||
return;
|
||||
},
|
||||
}
|
||||
match self.state {
|
||||
Nothing => {},
|
||||
Touching | Panning { .. } | Flinging { .. } => {
|
||||
self.state = Nothing;
|
||||
},
|
||||
Pinching => {
|
||||
self.state = Panning {
|
||||
velocity: Vector2D::new(0.0, 0.0),
|
||||
};
|
||||
},
|
||||
WaitingForScript | DefaultPrevented | MultiTouch => {
|
||||
if self.active_touch_points.is_empty() {
|
||||
self.state = Nothing;
|
||||
}
|
||||
},
|
||||
}
|
||||
self.state = Nothing;
|
||||
}
|
||||
|
||||
pub fn on_event_processed(&mut self, result: EventResult) {
|
||||
if let WaitingForScript = self.state {
|
||||
self.state = match result {
|
||||
EventResult::DefaultPrevented => DefaultPrevented,
|
||||
EventResult::DefaultAllowed => match self.touch_count() {
|
||||
1 => Touching,
|
||||
2 => Pinching,
|
||||
_ => MultiTouch,
|
||||
},
|
||||
}
|
||||
}
|
||||
pub fn on_fling(&mut self, velocity: Vector2D<f32, DevicePixel>, cursor: DeviceIntPoint) {
|
||||
self.state = Flinging { velocity, cursor };
|
||||
}
|
||||
|
||||
fn touch_count(&self) -> usize {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue