libservo: Move WebDriver messages to the embedder crate (#35602)

This is the first step toward moving the WebDriver implementation to
servoshell. This move will make it possible to start testing the
embedding API with WebDriver. See [this zulip thread][a] for more details.

While WebDriver will be able to use a lot of API commands to do what it
is doing now, there will still need to be some "cheat codes" for more
gnarly access to `ScriptThread` details. That's why we likely won't be
able to remove all WebDriver-specific messages from the API -- but maybe
they will be useful for embedders somehow.

A couple messages have to change as they depended on `script_traits`
types, particularly those that used `WindowSizeData` and `LoadData`. I
think this helps to encapsulate the WebDriver commands a bit more
though.

[a]: https://servo.zulipchat.com/#narrow/channel/437943-embedding/topic/webdriver.20as.20embedding.20api.20playgound

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

components/shared/script/webdriver_msg.rs

@@ -1,140 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-
-#![allow(missing_docs)]
-
-use std::collections::HashMap;
-
-use base::id::BrowsingContextId;
-use cookie::Cookie;
-use euclid::default::Rect;
-use hyper_serde::Serde;
-use ipc_channel::ipc::IpcSender;
-use serde::{Deserialize, Serialize};
-use servo_url::ServoUrl;
-use webdriver::common::{WebElement, WebFrame, WebWindow};
-use webdriver::error::ErrorStatus;
-
-#[derive(Debug, Deserialize, Serialize)]
-pub enum WebDriverScriptCommand {
-    AddCookie(
-        #[serde(
-            deserialize_with = "::hyper_serde::deserialize",
-            serialize_with = "::hyper_serde::serialize"
-        )]
-        Cookie<'static>,
-        IpcSender<Result<(), WebDriverCookieError>>,
-    ),
-    DeleteCookies(IpcSender<Result<(), ErrorStatus>>),
-    ExecuteScript(String, IpcSender<WebDriverJSResult>),
-    ExecuteAsyncScript(String, IpcSender<WebDriverJSResult>),
-    FindElementCSS(String, IpcSender<Result<Option<String>, ErrorStatus>>),
-    FindElementLinkText(String, bool, IpcSender<Result<Option<String>, ErrorStatus>>),
-    FindElementTagName(String, IpcSender<Result<Option<String>, ErrorStatus>>),
-    FindElementsCSS(String, IpcSender<Result<Vec<String>, ErrorStatus>>),
-    FindElementsLinkText(String, bool, IpcSender<Result<Vec<String>, ErrorStatus>>),
-    FindElementsTagName(String, IpcSender<Result<Vec<String>, ErrorStatus>>),
-    FindElementElementCSS(
-        String,
-        String,
-        IpcSender<Result<Option<String>, ErrorStatus>>,
-    ),
-    FindElementElementLinkText(
-        String,
-        String,
-        bool,
-        IpcSender<Result<Option<String>, ErrorStatus>>,
-    ),
-    FindElementElementTagName(
-        String,
-        String,
-        IpcSender<Result<Option<String>, ErrorStatus>>,
-    ),
-    FindElementElementsCSS(String, String, IpcSender<Result<Vec<String>, ErrorStatus>>),
-    FindElementElementsLinkText(
-        String,
-        String,
-        bool,
-        IpcSender<Result<Vec<String>, ErrorStatus>>,
-    ),
-    FindElementElementsTagName(String, String, IpcSender<Result<Vec<String>, ErrorStatus>>),
-    FocusElement(String, IpcSender<Result<(), ErrorStatus>>),
-    ElementClick(String, IpcSender<Result<Option<String>, ErrorStatus>>),
-    GetActiveElement(IpcSender<Option<String>>),
-    GetCookie(String, IpcSender<Vec<Serde<Cookie<'static>>>>),
-    GetCookies(IpcSender<Vec<Serde<Cookie<'static>>>>),
-    GetElementAttribute(
-        String,
-        String,
-        IpcSender<Result<Option<String>, ErrorStatus>>,
-    ),
-    GetElementProperty(
-        String,
-        String,
-        IpcSender<Result<WebDriverJSValue, ErrorStatus>>,
-    ),
-    GetElementCSS(String, String, IpcSender<Result<String, ErrorStatus>>),
-    GetElementRect(String, IpcSender<Result<Rect<f64>, ErrorStatus>>),
-    GetElementTagName(String, IpcSender<Result<String, ErrorStatus>>),
-    GetElementText(String, IpcSender<Result<String, ErrorStatus>>),
-    GetElementInViewCenterPoint(String, IpcSender<Result<Option<(i64, i64)>, ErrorStatus>>),
-    GetBoundingClientRect(String, IpcSender<Result<Rect<f32>, ErrorStatus>>),
-    GetBrowsingContextId(
-        WebDriverFrameId,
-        IpcSender<Result<BrowsingContextId, ErrorStatus>>,
-    ),
-    GetUrl(IpcSender<ServoUrl>),
-    GetPageSource(IpcSender<Result<String, ErrorStatus>>),
-    IsEnabled(String, IpcSender<Result<bool, ErrorStatus>>),
-    IsSelected(String, IpcSender<Result<bool, ErrorStatus>>),
-    GetTitle(IpcSender<String>),
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-pub enum WebDriverCookieError {
-    InvalidDomain,
-    UnableToSetCookie,
-}
-
-#[derive(Clone, Debug, Deserialize, Serialize)]
-pub enum WebDriverJSValue {
-    Undefined,
-    Null,
-    Boolean(bool),
-    Int(i32),
-    Number(f64),
-    String(String),
-    Element(WebElement),
-    Frame(WebFrame),
-    Window(WebWindow),
-    ArrayLike(Vec<WebDriverJSValue>),
-    Object(HashMap<String, WebDriverJSValue>),
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-pub enum WebDriverJSError {
-    /// Occurs when handler received an event message for a layout channel that is not
-    /// associated with the current script thread
-    BrowsingContextNotFound,
-    JSError,
-    StaleElementReference,
-    Timeout,
-    UnknownType,
-}
-
-pub type WebDriverJSResult = Result<WebDriverJSValue, WebDriverJSError>;
-
-#[derive(Debug, Deserialize, Serialize)]
-pub enum WebDriverFrameId {
-    Short(u16),
-    Element(String),
-    Parent,
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-pub enum LoadStatus {
-    LoadComplete,
-    LoadTimeout,
-    LoadCanceled,
-}