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libservo: Add a ClipboardDelegate and a default implementation (#35297)

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Add a `ClipboardDelegate` to the `WebView` API and a default
implementation in libservo for this delegate that works on Mac, Windows,
and Linux. Support for Android will be added in the future. This means
that embedders do not need to do anything special to get clipboard
support, but can choose to override it or implement it for other
platforms.

In addition, this adds support for handling fetches of clipboard contents
and renames things to reflect that eventually other types of clipboard
content will be supported. Part of this is removing the string
argument from the `ClipboardEventType::Paste` enum because script will
need to get other types of content from the clipboard than just a
string. It now talks to the embedder to get this information directly.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-02-07 11:43:46 +01:00 • committed by GitHub
parent b5b69988cc
commit 19e41ab9f9
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20 changed files with 212 additions and 127 deletions
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28
components/script/clipboard_provider.rs
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@ -7,11 +7,13 @@ use embedder_traits::EmbedderMsg;
use ipc_channel::ipc::channel;
use script_traits::{ScriptMsg, ScriptToConstellationChan};
/// A trait which abstracts access to the embedder's clipboard in order to allow unit
/// testing clipboard-dependent parts of `script`.
pub trait ClipboardProvider {
// blocking method to get the clipboard contents
fn clipboard_contents(&mut self) -> String;
// blocking method to set the clipboard contents
fn set_clipboard_contents(&mut self, _: String);
/// Get the text content of the clipboard.
fn get_text(&mut self) -> Result<String, String>;
/// Set the text content of the clipboard.
fn set_text(&mut self, _: String);
}
pub(crate) struct EmbedderClipboardProvider {
@ -20,20 +22,22 @@ pub(crate) struct EmbedderClipboardProvider {
}
impl ClipboardProvider for EmbedderClipboardProvider {
fn clipboard_contents(&mut self) -> String {
fn get_text(&mut self) -> Result<String, String> {
let (tx, rx) = channel().unwrap();
self.constellation_sender
.send(ScriptMsg::ForwardToEmbedder(
EmbedderMsg::GetClipboardContents(self.webview_id, tx),
))
.send(ScriptMsg::ForwardToEmbedder(EmbedderMsg::GetClipboardText(
self.webview_id,
tx,
)))
.unwrap();
rx.recv().unwrap()
}
fn set_clipboard_contents(&mut self, s: String) {
fn set_text(&mut self, s: String) {
self.constellation_sender
.send(ScriptMsg::ForwardToEmbedder(
EmbedderMsg::SetClipboardContents(self.webview_id, s),
))
.send(ScriptMsg::ForwardToEmbedder(EmbedderMsg::SetClipboardText(
self.webview_id,
s,
)))
.unwrap();
}
}