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Handle multi-touch events from glutin
This commit is contained in:
Matt Brubeck
parent
5c11c88e92
commit
ef93650db9
7 changed files with 227 additions and 102 deletions
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@ -35,8 +35,9 @@ use msg::constellation_msg::{NavigationDirection, PipelineId, WindowSizeData};
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use pipeline::CompositionPipeline;
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use profile_traits::mem::{self, ReportKind, Reporter, ReporterRequest};
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use profile_traits::time::{self, ProfilerCategory, profile};
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use script_traits::CompositorEvent::{TouchDownEvent, TouchMoveEvent, TouchUpEvent};
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use script_traits::CompositorEvent::TouchEvent;
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use script_traits::{ConstellationControlMsg, LayoutControlMsg, MouseButton};
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use script_traits::{TouchEventType, TouchId};
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use scrolling::ScrollingTimerProxy;
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use std::collections::hash_map::Entry::{Occupied, Vacant};
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use std::collections::{HashMap, HashSet};
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@ -72,23 +73,6 @@ enum ReadyState {
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ReadyToSaveImage,
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}
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/// The states of the touch input state machine.
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///
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/// TODO: Currently Add support for "flinging" (scrolling inertia), pinch zooming, better
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/// support for multiple touch points.
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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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WaitingForScript,
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/// Script is consuming the current touch point; 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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Touching,
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/// A single touch point is active and has started panning.
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Panning,
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}
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/// NB: Never block on the constellation, because sometimes the constellation blocks on us.
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pub struct IOCompositor<Window: WindowMethods> {
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/// The application window.
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@ -201,6 +185,27 @@ pub struct IOCompositor<Window: WindowMethods> {
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pending_subpages: HashSet<PipelineId>,
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}
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/// The states of the touch input state machine.
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///
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/// TODO: Currently Add support for "flinging" (scrolling inertia), pinch zooming.
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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 number of active touch points.
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WaitingForScript(u32),
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/// Script is consuming the current touch sequence; don't perform default actions.
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/// Contains the number of active touch points.
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DefaultPrevented(u32),
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/// A single touch point is active and may perform click or pan default actions.
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Touching,
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/// A single touch point is active and has started panning.
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Panning,
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/// A multi-touch gesture is in progress. Contains the number of active touch points.
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MultiTouch(u32),
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}
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pub struct ScrollEvent {
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delta: TypedPoint2D<DevicePixel, f32>,
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cursor: TypedPoint2D<DevicePixel, i32>,
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@ -537,10 +542,14 @@ impl<Window: WindowMethods> IOCompositor<Window> {
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(Msg::TouchEventProcessed(result), ShutdownState::NotShuttingDown) => {
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match self.touch_gesture_state {
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TouchState::WaitingForScript => {
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TouchState::WaitingForScript(n) => {
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self.touch_gesture_state = match result {
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EventResult::DefaultAllowed => TouchState::Touching,
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EventResult::DefaultPrevented => TouchState::DefaultPrevented,
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EventResult::DefaultPrevented => TouchState::DefaultPrevented(n),
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EventResult::DefaultAllowed => if n > 1 {
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TouchState::MultiTouch(n)
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} else {
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TouchState::Touching
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}
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};
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}
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_ => {}
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@ -1056,6 +1065,15 @@ impl<Window: WindowMethods> IOCompositor<Window> {
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self.on_mouse_window_move_event_class(cursor);
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}
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WindowEvent::Touch(event_type, identifier, location) => {
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match event_type {
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TouchEventType::Down => self.on_touch_down(identifier, location),
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TouchEventType::Move => self.on_touch_move(identifier, location),
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TouchEventType::Up => self.on_touch_up(identifier, location),
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TouchEventType::Cancel => self.on_touch_cancel(identifier, location),
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}
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}
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WindowEvent::Scroll(delta, cursor) => {
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self.on_scroll_window_event(delta, cursor);
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}
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@ -1127,8 +1145,8 @@ impl<Window: WindowMethods> IOCompositor<Window> {
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if opts::get().convert_mouse_to_touch {
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match mouse_window_event {
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MouseWindowEvent::Click(_, _) => {}
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MouseWindowEvent::MouseDown(_, p) => self.on_touch_down(0, p),
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MouseWindowEvent::MouseUp(_, p) => self.on_touch_up(0, p),
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MouseWindowEvent::MouseDown(_, p) => self.on_touch_down(TouchId(0), p),
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MouseWindowEvent::MouseUp(_, p) => self.on_touch_up(TouchId(0), p),
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}
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return
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}
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@ -1146,7 +1164,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
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fn on_mouse_window_move_event_class(&mut self, cursor: TypedPoint2D<DevicePixel, f32>) {
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if opts::get().convert_mouse_to_touch {
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self.on_touch_move(0, cursor);
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self.on_touch_move(TouchId(0), cursor);
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return
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}
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@ -1156,31 +1174,40 @@ impl<Window: WindowMethods> IOCompositor<Window> {
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}
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}
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fn on_touch_down(&mut self, identifier: i32, point: TypedPoint2D<DevicePixel, f32>) {
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match self.touch_gesture_state {
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fn on_touch_down(&mut self, identifier: TouchId, point: TypedPoint2D<DevicePixel, f32>) {
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self.touch_gesture_state = match self.touch_gesture_state {
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TouchState::Nothing => {
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// TODO: Don't wait for script if we know the page has no touch event listeners.
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self.first_touch_point = Some(point);
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self.last_touch_point = Some(point);
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self.touch_gesture_state = TouchState::WaitingForScript;
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TouchState::WaitingForScript(1)
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}
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TouchState::WaitingForScript => {
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// TODO: Queue events while waiting for script?
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TouchState::Touching |
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TouchState::Panning => {
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// Was a single-touch sequence; now a multi-touch sequence:
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TouchState::MultiTouch(2)
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}
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TouchState::DefaultPrevented => {}
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TouchState::Touching => {}
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TouchState::Panning => {}
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}
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TouchState::WaitingForScript(n) => {
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TouchState::WaitingForScript(n + 1)
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}
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TouchState::DefaultPrevented(n) => {
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TouchState::DefaultPrevented(n + 1)
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}
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TouchState::MultiTouch(n) => {
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TouchState::MultiTouch(n + 1)
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}
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};
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if let Some(result) = self.find_topmost_layer_at_point(point / self.scene.scale) {
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result.layer.send_event(self, TouchDownEvent(identifier, result.point.to_untyped()));
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result.layer.send_event(self, TouchEvent(TouchEventType::Down, identifier,
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result.point.to_untyped()));
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}
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}
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fn on_touch_move(&mut self, identifier: i32, point: TypedPoint2D<DevicePixel, f32>) {
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fn on_touch_move(&mut self, identifier: TouchId, point: TypedPoint2D<DevicePixel, f32>) {
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match self.touch_gesture_state {
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TouchState::Nothing => warn!("Got unexpected touch move event"),
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TouchState::WaitingForScript => {
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TouchState::WaitingForScript(_) => {
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// TODO: Queue events while waiting for script?
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}
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TouchState::Touching => {
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@ -1209,40 +1236,67 @@ impl<Window: WindowMethods> IOCompositor<Window> {
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None => warn!("last_touch_point not set")
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}
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}
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TouchState::DefaultPrevented => {
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TouchState::DefaultPrevented(_) => {
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// Send the event to script.
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if let Some(result) = self.find_topmost_layer_at_point(point / self.scene.scale) {
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result.layer.send_event(self,
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TouchMoveEvent(identifier, result.point.to_untyped()));
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result.layer.send_event(self, TouchEvent(TouchEventType::Move, identifier,
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result.point.to_untyped()));
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}
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}
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TouchState::MultiTouch(_) => {
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// TODO: Pinch zooming.
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}
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}
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self.last_touch_point = Some(point);
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}
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fn on_touch_up(&mut self, identifier: i32, point: TypedPoint2D<DevicePixel, f32>) {
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// TODO: Track the number of active touch points, and don't reset stuff until it is zero.
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self.first_touch_point = None;
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self.last_touch_point = None;
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fn on_touch_up(&mut self, identifier: TouchId, point: TypedPoint2D<DevicePixel, f32>) {
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// Send the event to script.
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if let Some(result) = self.find_topmost_layer_at_point(point / self.scene.scale) {
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result.layer.send_event(self, TouchUpEvent(identifier, result.point.to_untyped()));
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result.layer.send_event(self, TouchEvent(TouchEventType::Up, identifier,
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result.point.to_untyped()));
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}
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match self.touch_gesture_state {
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TouchState::Nothing => warn!("Got unexpected touch up event"),
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TouchState::WaitingForScript => {}
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self.touch_gesture_state = match self.touch_gesture_state {
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TouchState::Touching => {
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// TODO: If the duration exceeds some threshold, send a contextmenu event instead.
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// TODO: Don't send a click if preventDefault is called on the touchend event.
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self.simulate_mouse_click(point);
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TouchState::Nothing
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}
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TouchState::Panning => {}
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TouchState::DefaultPrevented => {}
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TouchState::Nothing |
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TouchState::Panning |
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TouchState::WaitingForScript(1) |
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TouchState::DefaultPrevented(1) |
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TouchState::MultiTouch(1) => {
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TouchState::Nothing
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}
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TouchState::WaitingForScript(n) => TouchState::WaitingForScript(n - 1),
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TouchState::DefaultPrevented(n) => TouchState::DefaultPrevented(n - 1),
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TouchState::MultiTouch(n) => TouchState::MultiTouch(n - 1),
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};
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}
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fn on_touch_cancel(&mut self, identifier: TouchId, point: TypedPoint2D<DevicePixel, f32>) {
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// Send the event to script.
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if let Some(result) = self.find_topmost_layer_at_point(point / self.scene.scale) {
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result.layer.send_event(self, TouchEvent(TouchEventType::Cancel, identifier,
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result.point.to_untyped()));
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}
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self.touch_gesture_state = TouchState::Nothing;
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self.touch_gesture_state = match self.touch_gesture_state {
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TouchState::Nothing |
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TouchState::Touching |
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TouchState::Panning |
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TouchState::WaitingForScript(1) |
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TouchState::DefaultPrevented(1) |
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TouchState::MultiTouch(1) => {
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TouchState::Nothing
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}
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TouchState::WaitingForScript(n) => TouchState::WaitingForScript(n - 1),
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TouchState::DefaultPrevented(n) => TouchState::DefaultPrevented(n - 1),
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TouchState::MultiTouch(n) => TouchState::MultiTouch(n - 1),
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};
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}
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/// http://w3c.github.io/touch-events/#mouse-events
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@ -13,7 +13,7 @@ use layers::geometry::DevicePixel;
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use layers::platform::surface::NativeDisplay;
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use msg::constellation_msg::{Key, KeyModifiers, KeyState};
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use net_traits::net_error_list::NetError;
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use script_traits::MouseButton;
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use script_traits::{MouseButton, TouchEventType, TouchId};
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use std::fmt::{Debug, Error, Formatter};
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use std::rc::Rc;
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use url::Url;
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@ -27,6 +27,7 @@ pub enum MouseWindowEvent {
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MouseUp(MouseButton, TypedPoint2D<DevicePixel, f32>),
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}
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#[derive(Clone)]
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pub enum WindowNavigateMsg {
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Forward,
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@ -59,6 +60,8 @@ pub enum WindowEvent {
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MouseWindowEventClass(MouseWindowEvent),
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/// Sent when a mouse move.
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MouseWindowMoveEventClass(TypedPoint2D<DevicePixel, f32>),
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/// Touch event: type, identifier, point
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Touch(TouchEventType, TouchId, TypedPoint2D<DevicePixel, f32>),
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/// Sent when the user scrolls. The first point is the delta and the second point is the
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/// origin.
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Scroll(TypedPoint2D<DevicePixel, f32>, TypedPoint2D<DevicePixel, i32>),
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@ -88,6 +91,7 @@ impl Debug for WindowEvent {
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WindowEvent::LoadUrl(..) => write!(f, "LoadUrl"),
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WindowEvent::MouseWindowEventClass(..) => write!(f, "Mouse"),
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WindowEvent::MouseWindowMoveEventClass(..) => write!(f, "MouseMove"),
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WindowEvent::Touch(..) => write!(f, "Touch"),
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WindowEvent::Scroll(..) => write!(f, "Scroll"),
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WindowEvent::Zoom(..) => write!(f, "Zoom"),
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WindowEvent::PinchZoom(..) => write!(f, "PinchZoom"),
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