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https://github.com/servo/servo.git
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79 lines
3.8 KiB
Rust
79 lines
3.8 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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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 servo::webrender_api::units::DeviceIntRect;
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use servo::{
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InputMethodType, LoadStatus, MediaSessionPlaybackState, PermissionRequest, SimpleDialog,
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WebView,
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};
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/// Callbacks implemented by embedder. Called by our RunningAppState, generally on behalf of Servo.
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pub trait HostTrait {
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/// Content in a [`WebView`] is requesting permission to access a feature requiring
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/// permission from the user. The embedder should allow or deny the request, either by
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/// reading a cached value or querying the user for permission via the user interface.
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fn request_permission(&self, _webview: WebView, _: PermissionRequest);
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/// Show the user a [simple dialog](https://html.spec.whatwg.org/multipage/#simple-dialogs) (`alert()`, `confirm()`,
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/// or `prompt()`). Since their messages are controlled by web content, they should be presented to the user in a
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/// way that makes them impossible to mistake for browser UI.
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/// TODO: This API needs to be reworked to match the new model of how responses are sent.
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fn show_simple_dialog(&self, _webview: WebView, dialog: SimpleDialog);
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/// Show context menu
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fn show_context_menu(&self, title: Option<String>, items: Vec<String>);
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/// Notify that the load status of the page has changed.
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/// Started:
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/// - "Reload button" should be disabled.
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/// - "Stop button" should be enabled.
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/// - Throbber starts spinning.
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/// Complete:
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/// - "Reload button" should be enabled.
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/// - "Stop button" should be disabled.
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/// - Throbber stops spinning.
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fn notify_load_status_changed(&self, load_status: LoadStatus);
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/// Page title has changed.
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fn on_title_changed(&self, title: Option<String>);
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/// Allow Navigation.
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fn on_allow_navigation(&self, url: String) -> bool;
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/// Page URL has changed.
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fn on_url_changed(&self, url: String);
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/// Back/forward state has changed.
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/// Back/forward buttons need to be disabled/enabled.
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fn on_history_changed(&self, can_go_back: bool, can_go_forward: bool);
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/// Page animation state has changed. If animating, it's recommended
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/// that the embedder doesn't wait for the wake function to be called
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/// to call perform_updates. Usually, it means doing:
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/// ```rust
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/// while true {
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/// servo.perform_updates();
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/// servo.present_if_needed();
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/// }
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/// ```
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/// . This will end up calling flush
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/// which will call swap_buffer which will be blocking long enough to limit
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/// drawing at 60 FPS.
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/// If not animating, call perform_updates only when needed (when the embedder
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/// has events for Servo, or Servo has woken up the embedder event loop via
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/// EventLoopWaker).
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fn on_animating_changed(&self, animating: bool);
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/// Servo finished shutting down.
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fn on_shutdown_complete(&self);
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/// A text input is focused.
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fn on_ime_show(
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&self,
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input_type: InputMethodType,
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text: Option<(String, i32)>,
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multiline: bool,
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bounds: DeviceIntRect,
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);
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/// Input lost focus
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fn on_ime_hide(&self);
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/// Called when we get the media session metadata/
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fn on_media_session_metadata(&self, title: String, artist: String, album: String);
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/// Called when the media session playback state changes.
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fn on_media_session_playback_state_change(&self, state: MediaSessionPlaybackState);
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/// Called when the media session position state is set.
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fn on_media_session_set_position_state(&self, duration: f64, position: f64, playback_rate: f64);
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/// Called when we get a panic message from constellation
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fn on_panic(&self, reason: String, backtrace: Option<String>);
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}
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