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implement Touchevent prevent default behavior (#35031)

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* 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 2025-02-17 18:50:04 +08:00 • committed by GitHub
parent 6dce329acc
commit 3fe42a0b5a
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12 changed files with 273 additions and 255 deletions
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11
components/script/script_thread.rs
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@ -45,7 +45,7 @@ use devtools_traits::{
CSSError, DevtoolScriptControlMsg, DevtoolsPageInfo, NavigationState,
ScriptToDevtoolsControlMsg, WorkerId,
};
use embedder_traits::{EmbedderMsg, InputEvent, MediaSessionActionType, Theme, TouchEventAction};
use embedder_traits::{EmbedderMsg, InputEvent, MediaSessionActionType, Theme};
use euclid::default::Rect;
use fonts::{FontContext, SystemFontServiceProxy};
use headers::{HeaderMapExt, LastModified, ReferrerPolicy as ReferrerPolicyHeader};
@ -1101,13 +1101,12 @@ impl ScriptThread {
InputEvent::Touch(touch_event) => {
let touch_result =
document.handle_touch_event(touch_event, event.hit_test_result, can_gc);
match (touch_event.action, touch_result) {
(TouchEventAction::Down, TouchEventResult::Processed(handled)) => {
match touch_result {
TouchEventResult::Processed(handled) => {
let result = if handled {
// TODO: Wait to see if preventDefault is called on the first touchmove event.
EventResult::DefaultAllowed
EventResult::DefaultAllowed(touch_event.action)
} else {
EventResult::DefaultPrevented
EventResult::DefaultPrevented(touch_event.event_type)
};
let message = ScriptMsg::TouchEventProcessed(result);
self.senders