feat: 大屏桌面壳（Tauri 2）

src-tauri/vendor/wry/src/webkitgtk/drag_drop.rs

@@ -0,0 +1,143 @@
+// Copyright 2020-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+use std::{
+  cell::{Cell, UnsafeCell},
+  path::PathBuf,
+  rc::Rc,
+};
+
+use gtk::{glib::GString, prelude::*};
+use webkit2gtk::WebView;
+
+use crate::DragDropEvent;
+
+#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Debug)]
+enum DragControllerState {
+  Entered,
+  Leaving,
+  Left,
+}
+
+struct DragDropController {
+  paths: UnsafeCell<Option<Vec<PathBuf>>>,
+  state: Cell<DragControllerState>,
+  position: Cell<(i32, i32)>,
+  handler: Box<dyn Fn(DragDropEvent) -> bool>,
+}
+
+impl DragDropController {
+  fn new(handler: Box<dyn Fn(DragDropEvent) -> bool>) -> Self {
+    Self {
+      handler,
+      paths: UnsafeCell::new(None),
+      state: Cell::new(DragControllerState::Left),
+      position: Cell::new((0, 0)),
+    }
+  }
+
+  fn store_paths(&self, paths: Vec<PathBuf>) {
+    unsafe { *self.paths.get() = Some(paths) };
+  }
+
+  fn take_paths(&self) -> Option<Vec<PathBuf>> {
+    unsafe { &mut *self.paths.get() }.take()
+  }
+
+  fn store_position(&self, position: (i32, i32)) {
+    self.position.replace(position);
+  }
+
+  fn enter(&self) {
+    self.state.set(DragControllerState::Entered);
+  }
+
+  fn leaving(&self) {
+    self.state.set(DragControllerState::Leaving);
+  }
+
+  fn leave(&self) {
+    self.state.set(DragControllerState::Left);
+  }
+
+  fn state(&self) -> DragControllerState {
+    self.state.get()
+  }
+
+  fn call(&self, event: DragDropEvent) -> bool {
+    (self.handler)(event)
+  }
+}
+
+pub(crate) fn connect_drag_event(webview: &WebView, handler: Box<dyn Fn(DragDropEvent) -> bool>) {
+  let controller = Rc::new(DragDropController::new(handler));
+
+  {
+    let controller = controller.clone();
+    webview.connect_drag_data_received(move |_, _, _, _, data, info, _| {
+      if info == 2 {
+        let uris = data.uris();
+        let paths = uris.iter().map(path_buf_from_uri).collect::<Vec<_>>();
+        controller.enter();
+        controller.call(DragDropEvent::Enter {
+          paths: paths.clone(),
+          position: controller.position.get(),
+        });
+        controller.store_paths(paths);
+      }
+    });
+  }
+
+  {
+    let controller = controller.clone();
+    webview.connect_drag_motion(move |_, _, x, y, _| {
+      if controller.state() == DragControllerState::Entered {
+        controller.call(DragDropEvent::Over { position: (x, y) });
+      } else {
+        controller.store_position((x, y));
+      }
+      false
+    });
+  }
+
+  {
+    let controller = controller.clone();
+    webview.connect_drag_drop(move |_, ctx, x, y, time| {
+      if controller.state() == DragControllerState::Leaving {
+        if let Some(paths) = controller.take_paths() {
+          ctx.drop_finish(true, time);
+          controller.leave();
+          return controller.call(DragDropEvent::Drop {
+            paths,
+            position: (x, y),
+          });
+        }
+      }
+
+      false
+    });
+  }
+
+  webview.connect_drag_leave(move |_w, _, _| {
+    if controller.state() != DragControllerState::Left {
+      controller.leaving();
+      let controller = controller.clone();
+      gtk::glib::idle_add_local_once(move || {
+        if controller.state() == DragControllerState::Leaving {
+          controller.leave();
+          controller.call(DragDropEvent::Leave);
+        }
+      });
+    }
+  });
+}
+
+fn path_buf_from_uri(gstr: &GString) -> PathBuf {
+  let path = gstr.as_str();
+  let path = path.strip_prefix("file://").unwrap_or(path);
+  let path = percent_encoding::percent_decode(path.as_bytes())
+    .decode_utf8_lossy()
+    .to_string();
+  PathBuf::from(path)
+}

src-tauri/vendor/wry/src/webkitgtk/synthetic_mouse_events.rs

@@ -0,0 +1,187 @@
+use std::{cell::RefCell, rc::Rc};
+
+use gtk::{
+  gdk::{EventButton, EventMask, ModifierType},
+  prelude::*,
+};
+use webkit2gtk::{WebView, WebViewExt};
+
+pub fn setup(webview: &WebView) {
+  webview.add_events(EventMask::BUTTON1_MOTION_MASK | EventMask::BUTTON_PRESS_MASK);
+
+  let bf_state = BackForwardState(Rc::new(RefCell::new(0)));
+
+  let bf_state_c = bf_state.clone();
+  webview.connect_button_press_event(move |webview, event| {
+    let mut inhibit = false;
+    match event.button() {
+      // back button
+      8 => {
+        inhibit = true;
+        bf_state_c.set(BACK);
+        webview.run_javascript(
+          &create_js_mouse_event(event, true, &bf_state_c),
+          None::<&gtk::gio::Cancellable>,
+          |_| {},
+        );
+      }
+      // forward button
+      9 => {
+        inhibit = true;
+        bf_state_c.set(FORWARD);
+        webview.run_javascript(
+          &create_js_mouse_event(event, true, &bf_state_c),
+          None::<&gtk::gio::Cancellable>,
+          |_| {},
+        );
+      }
+      _ => {}
+    }
+
+    if inhibit {
+      gtk::glib::Propagation::Stop
+    } else {
+      gtk::glib::Propagation::Proceed
+    }
+  });
+
+  let bf_state_c = bf_state.clone();
+  webview.connect_button_release_event(move |webview, event| {
+    let mut inhibit = false;
+    match event.button() {
+      // back button
+      8 => {
+        inhibit = true;
+        bf_state_c.remove(BACK);
+        webview.run_javascript(
+          &create_js_mouse_event(event, false, &bf_state_c),
+          None::<&gtk::gio::Cancellable>,
+          |_| {},
+        );
+      }
+      // forward button
+      9 => {
+        inhibit = true;
+        bf_state_c.remove(FORWARD);
+        webview.run_javascript(
+          &create_js_mouse_event(event, false, &bf_state_c),
+          None::<&gtk::gio::Cancellable>,
+          |_| {},
+        );
+      }
+      _ => {}
+    }
+    if inhibit {
+      gtk::glib::Propagation::Stop
+    } else {
+      gtk::glib::Propagation::Proceed
+    }
+  });
+}
+
+fn create_js_mouse_event(event: &EventButton, pressed: bool, state: &BackForwardState) -> String {
+  let event_name = if pressed { "mousedown" } else { "mouseup" };
+  // js equivalent https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button
+  let button = if event.button() == 8 { 3 } else { 4 };
+  let (x, y) = event.position();
+  let (x, y) = (x as i32, y as i32);
+  let modifers_state = event.state();
+  let mut buttons = 0;
+  // left button
+  if modifers_state.contains(ModifierType::BUTTON1_MASK) {
+    buttons += 1;
+  }
+  // right button
+  if modifers_state.contains(ModifierType::BUTTON3_MASK) {
+    buttons += 2;
+  }
+  // middle button
+  if modifers_state.contains(ModifierType::BUTTON2_MASK) {
+    buttons += 4;
+  }
+  // back button
+  if state.has(BACK) {
+    buttons += 8;
+  }
+  // if modifers_state.contains(ModifierType::BUTTON4_MASK) {
+  //   buttons += 8;
+  // }
+  // forward button
+  if state.has(FORWARD) {
+    buttons += 16;
+  }
+  // if modifers_state.contains(ModifierType::BUTTON5_MASK) {
+  //   buttons += 16;
+  // }
+  format!(
+    r#"(() => {{
+        const el = document.elementFromPoint({x},{y});
+        const ev = new MouseEvent('{event_name}', {{
+          view: window,
+          button: {button},
+          buttons: {buttons},
+          x: {x},
+          y: {y},
+          bubbles: true,
+          detail: {detail},
+          cancelBubble: false,
+          cancelable: true,
+          clientX: {x},
+          clientY: {y},
+          composed: true,
+          layerX: {x},
+          layerY: {y},
+          pageX: {x},
+          pageY: {y},
+          screenX: window.screenX + {x},
+          screenY: window.screenY + {y},
+          ctrlKey: {ctrl_key},
+          metaKey: {meta_key},
+          shiftKey: {shift_key},
+          altKey: {alt_key},
+        }});
+        el.dispatchEvent(ev)
+        if (!ev.defaultPrevented && "{event_name}" === "mouseup") {{
+          if (ev.button === 3) {{
+            window.history.back();
+          }}
+          if (ev.button === 4) {{
+            window.history.forward();
+          }}
+        }}
+      }})()"#,
+    event_name = event_name,
+    x = x,
+    y = y,
+    detail = event.click_count().unwrap_or(1),
+    ctrl_key = modifers_state.contains(ModifierType::CONTROL_MASK),
+    alt_key = modifers_state.contains(ModifierType::MOD1_MASK),
+    shift_key = modifers_state.contains(ModifierType::SHIFT_MASK),
+    meta_key = modifers_state.contains(ModifierType::SUPER_MASK),
+    button = button,
+    buttons = buttons,
+  )
+}
+
+// Internal modifiers to track whether BACK/FORWARD buttons are pressed
+const BACK: u8 = 0b01;
+const FORWARD: u8 = 0b10;
+
+/// A single u8 that stores whether [BACK] and [FORWARD] are pressed or not
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+struct BackForwardState(Rc<RefCell<u8>>);
+
+impl BackForwardState {
+  fn set(&self, button: u8) {
+    *self.0.borrow_mut() |= button
+  }
+
+  fn remove(&self, button: u8) {
+    *self.0.borrow_mut() &= !button
+  }
+
+  fn has(&self, button: u8) -> bool {
+    let state = *self.0.borrow();
+    state & !button != state
+  }
+}

src-tauri/vendor/wry/src/webkitgtk/web_context.rs

@@ -0,0 +1,404 @@
+// Copyright 2020-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+//! Unix platform extensions for [`WebContext`](super::WebContext).
+
+use crate::{Error, RequestAsyncResponder};
+use gtk::glib::{self, MainContext, ObjectExt};
+use http::{header::CONTENT_TYPE, HeaderName, HeaderValue, Request, Response as HttpResponse};
+use soup::{MessageHeaders, MessageHeadersType};
+use std::{
+  borrow::Cow,
+  cell::RefCell,
+  env::current_dir,
+  path::{Path, PathBuf},
+  rc::Rc,
+};
+use webkit2gtk::{
+  ApplicationInfo, AutomationSessionExt, CookiePersistentStorage, DownloadExt, SecurityManagerExt,
+  URIRequest, URIRequestExt, URISchemeRequest, URISchemeRequestExt, URISchemeResponse,
+  URISchemeResponseExt, WebContext, WebContextExt as Webkit2gtkContextExt, WebView, WebViewExt,
+};
+
+#[derive(Debug)]
+pub struct WebContextImpl {
+  context: WebContext,
+  automation: bool,
+  app_info: Option<ApplicationInfo>,
+}
+
+impl WebContextImpl {
+  pub fn new(data_directory: Option<&Path>) -> Self {
+    use webkit2gtk::{CookieManagerExt, WebsiteDataManager, WebsiteDataManagerExt};
+    let mut context_builder = WebContext::builder();
+    if let Some(data_directory) = data_directory {
+      let data_manager = WebsiteDataManager::builder()
+        // TODO: Consider taking a cache_directory so this can be in XDG_CACHE_HOME.
+        .base_cache_directory(data_directory.to_string_lossy())
+        .base_data_directory(data_directory.to_string_lossy())
+        .build();
+      if let Some(cookie_manager) = data_manager.cookie_manager() {
+        cookie_manager.set_persistent_storage(
+          &data_directory.join("cookies").to_string_lossy(),
+          CookiePersistentStorage::Text,
+        );
+      }
+      context_builder = context_builder.website_data_manager(&data_manager);
+    }
+    let context = context_builder.build();
+
+    Self::create_context(context)
+  }
+
+  pub fn new_ephemeral() -> Self {
+    let context = WebContext::new_ephemeral();
+
+    Self::create_context(context)
+  }
+
+  pub fn create_context(context: WebContext) -> Self {
+    let automation = false;
+    context.set_automation_allowed(automation);
+
+    // e.g. wry 0.9.4
+    let app_info = ApplicationInfo::new();
+    app_info.set_name(env!("CARGO_PKG_NAME"));
+    app_info.set_version(
+      env!("CARGO_PKG_VERSION_MAJOR")
+        .parse()
+        .expect("invalid wry version major"),
+      env!("CARGO_PKG_VERSION_MINOR")
+        .parse()
+        .expect("invalid wry version minor"),
+      env!("CARGO_PKG_VERSION_PATCH")
+        .parse()
+        .expect("invalid wry version patch"),
+    );
+
+    Self {
+      context,
+      automation,
+      app_info: Some(app_info),
+    }
+  }
+
+  pub fn set_allows_automation(&mut self, flag: bool) {
+    self.automation = flag;
+    self.context.set_automation_allowed(flag);
+  }
+
+  pub fn set_web_extensions_directory(&mut self, path: &Path) {
+    self
+      .context
+      .set_web_extensions_directory(&path.to_string_lossy());
+  }
+}
+
+/// [`WebContext`](super::WebContext) items that only matter on unix.
+pub trait WebContextExt {
+  /// The GTK [`WebContext`] of all webviews in the context.
+  fn context(&self) -> &WebContext;
+
+  /// Register a custom protocol to the web context.
+  fn register_uri_scheme<F>(&mut self, name: &str, handler: F) -> crate::Result<()>
+  where
+    F: Fn(crate::WebViewId, Request<Vec<u8>>, RequestAsyncResponder) + 'static;
+
+  /// Loads a URI for a [`WebView`].
+  fn load_uri(&self, webview: WebView, url: String, headers: Option<http::HeaderMap>);
+
+  /// If the context allows automation.
+  ///
+  /// **Note:** `libwebkit2gtk` only allows 1 automation context at a time.
+  fn allows_automation(&self) -> bool;
+
+  fn register_automation(&mut self, webview: WebView);
+
+  fn register_download_handler(
+    &mut self,
+    download_started_callback: Option<Box<dyn FnMut(String, &mut PathBuf) -> bool>>,
+    download_completed_callback: Option<Rc<dyn Fn(String, Option<PathBuf>, bool) + 'static>>,
+  );
+}
+
+impl WebContextExt for super::WebContext {
+  fn context(&self) -> &WebContext {
+    &self.os.context
+  }
+
+  fn register_uri_scheme<F>(&mut self, name: &str, handler: F) -> crate::Result<()>
+  where
+    F: Fn(crate::WebViewId, Request<Vec<u8>>, RequestAsyncResponder) + 'static,
+  {
+    self.register_custom_protocol(name.to_owned())?;
+
+    // Enable secure context
+    self
+      .os
+      .context
+      .security_manager()
+      .ok_or(Error::MissingManager)?
+      .register_uri_scheme_as_secure(name);
+
+    self.os.context.register_uri_scheme(name, move |request| {
+      #[cfg(feature = "tracing")]
+      let span = tracing::info_span!(parent: None, "wry::custom_protocol::handle", uri = tracing::field::Empty).entered();
+
+      if let Some(uri) = request.uri() {
+        let uri = uri.as_str();
+
+        #[cfg(feature = "tracing")]
+        span.record("uri", uri);
+
+        #[allow(unused_mut)]
+        let mut http_request = Request::builder().uri(uri).method("GET");
+
+        // Set request http headers
+        if let Some(headers) = request.http_headers() {
+          if let Some(map) = http_request.headers_mut() {
+            headers.foreach(move |k, v| {
+              if let Ok(name) = HeaderName::from_bytes(k.as_bytes()) {
+                if let Ok(value) = HeaderValue::from_bytes(v.as_bytes()) {
+                  map.insert(name, value);
+                }
+              }
+            });
+          }
+        }
+
+        // Set request http method
+        if let Some(method) = request.http_method() {
+          http_request = http_request.method(method.as_str());
+        }
+
+        let body;
+        #[cfg(feature = "linux-body")]
+        {
+          use gtk::{gdk::prelude::InputStreamExtManual, gio::Cancellable};
+
+          // Set request http body
+          let cancellable: Option<&Cancellable> = None;
+          body = request
+            .http_body()
+            .map(|s| {
+              const BUFFER_LEN: usize = 1024;
+              let mut result = Vec::new();
+              let mut buffer = vec![0; BUFFER_LEN];
+              while let Ok(count) = s.read(&mut buffer[..], cancellable) {
+                if count == BUFFER_LEN {
+                  result.append(&mut buffer);
+                  buffer.resize(BUFFER_LEN, 0);
+                } else {
+                  buffer.truncate(count);
+                  result.append(&mut buffer);
+                  break;
+                }
+              }
+              result
+            })
+            .unwrap_or_default();
+        }
+        #[cfg(not(feature = "linux-body"))]
+        {
+          body = Vec::new();
+        }
+
+        let http_request = match http_request.body(body) {
+          Ok(req) => req,
+          Err(_) => {
+            request.finish_error(&mut gtk::glib::Error::new(
+              glib::UriError::Failed,
+              "Internal server error: could not create request.",
+            ));
+            return;
+          }
+        };
+
+        let request_ = MainThreadRequest(request.clone());
+        let responder: Box<dyn FnOnce(HttpResponse<Cow<'static, [u8]>>)> =
+          Box::new(move |http_response| {
+            MainContext::default().invoke(move || {
+              let buffer = http_response.body();
+              let input = gtk::gio::MemoryInputStream::from_bytes(&gtk::glib::Bytes::from(buffer));
+              let content_type = http_response
+                .headers()
+                .get(CONTENT_TYPE)
+                .and_then(|h| h.to_str().ok());
+
+              let response = URISchemeResponse::new(&input, buffer.len() as i64);
+              response.set_status(http_response.status().as_u16() as u32, None);
+              if let Some(content_type) = content_type {
+                response.set_content_type(content_type);
+              }
+
+              let headers = MessageHeaders::new(MessageHeadersType::Response);
+              for (name, value) in http_response.headers().into_iter() {
+                headers.append(name.as_str(), value.to_str().unwrap_or(""));
+              }
+              response.set_http_headers(headers);
+              request_.finish_with_response(&response);
+            });
+
+          });
+
+        #[cfg(feature = "tracing")]
+        let _span = tracing::info_span!("wry::custom_protocol::call_handler").entered();
+
+        let webview_id = request
+          .web_view()
+          .and_then(|w| unsafe { w.data::<String>(super::WEBVIEW_ID) })
+          .map(|id| unsafe { id.as_ref().clone() })
+          .unwrap_or_default();
+
+        handler(&webview_id, http_request, RequestAsyncResponder { responder });
+      } else {
+        request.finish_error(&mut glib::Error::new(
+          glib::FileError::Exist,
+          "Could not get uri.",
+        ));
+      }
+    });
+
+    Ok(())
+  }
+
+  fn load_uri(&self, webview: WebView, uri: String, headers: Option<http::HeaderMap>) {
+    if let Some(headers) = headers {
+      let req = URIRequest::builder().uri(&uri).build();
+
+      if let Some(ref mut req_headers) = req.http_headers() {
+        for (header, value) in headers.iter() {
+          req_headers.append(
+            header.to_string().as_str(),
+            value.to_str().unwrap_or_default(),
+          );
+        }
+      }
+
+      webview.load_request(&req);
+    } else {
+      webview.load_uri(&uri);
+    }
+  }
+
+  fn allows_automation(&self) -> bool {
+    self.os.automation
+  }
+
+  fn register_automation(&mut self, webview: WebView) {
+    if let (true, Some(app_info)) = (self.os.automation, self.os.app_info.take()) {
+      self.os.context.connect_automation_started(move |_, auto| {
+        let webview = webview.clone();
+        auto.set_application_info(&app_info);
+
+        // We do **NOT** support arbitrarily creating new webviews.
+        // To support this in the future, we would need a way to specify the
+        // default WindowBuilder to use to create the window it will use, and
+        // possibly "default" webview attributes. Difficulty comes in for controlling
+        // the owned Window that would need to be used.
+        //
+        // Instead, we just pass the first created webview.
+        auto.connect_create_web_view(None, move |_| webview.clone());
+      });
+    }
+  }
+
+  fn register_download_handler(
+    &mut self,
+    download_started_handler: Option<Box<dyn FnMut(String, &mut PathBuf) -> bool>>,
+    download_completed_handler: Option<Rc<dyn Fn(String, Option<PathBuf>, bool) + 'static>>,
+  ) {
+    let context = &self.os.context;
+
+    let download_started_handler = Rc::new(RefCell::new(download_started_handler));
+    let failed = Rc::new(RefCell::new(false));
+
+    context.connect_download_started(move |_context, download| {
+      let download_started_handler = download_started_handler.clone();
+      download.connect_decide_destination(move |download, suggested_filename| {
+        if let Some(uri) = download.request().and_then(|req| req.uri()) {
+          let uri = uri.to_string();
+
+          if let Some(download_started_handler) = download_started_handler.borrow_mut().as_mut() {
+            let mut download_destination =
+              dirs::download_dir().unwrap_or_else(|| current_dir().unwrap_or_default());
+
+            let (mut suggested_filename, ext) = suggested_filename
+              .split_once('.')
+              .map(|(base, ext)| (base, format!(".{ext}")))
+              .unwrap_or((suggested_filename, "".to_string()));
+
+            // For `data:` downloads, webkitgtk will suggest to use the raw data as the filename if the dev provided no name,
+            // for example `"data:attachment/text,sometext"` will result in `text,sometext` but longer data URLs will
+            // result in a cut-off filename, which makes it hard to predict reliably.
+            // TODO: If this keeps causing problems, just remove it and use whatever file name webkitgtk suggests.
+            if uri.starts_with("data:") {
+              if let Some((_, uri_stripped)) = uri.split_once('/') {
+                if let Some((uri_stripped, _)) = uri_stripped.split_once(',') {
+                  if suggested_filename.starts_with(&format!("{uri_stripped},")) {
+                    suggested_filename = "Unknown";
+                  }
+                }
+              }
+            }
+
+            download_destination.push(format!("{suggested_filename}{ext}"));
+
+            // WebView2 does not overwrite files but appends numbers
+            let mut counter = 1;
+            while download_destination.exists() {
+              download_destination.set_file_name(format!("{suggested_filename} ({counter}){ext}"));
+              counter += 1;
+            }
+
+            if download_started_handler(uri, &mut download_destination) {
+              download.set_destination(&download_destination.to_string_lossy());
+            } else {
+              download.cancel();
+            }
+          }
+        }
+        // TODO: check if we may also need `false`
+        true
+      });
+
+      download.connect_failed({
+        let failed = failed.clone();
+        move |_, _error| {
+          *failed.borrow_mut() = true;
+        }
+      });
+
+      if let Some(download_completed_handler) = download_completed_handler.clone() {
+        download.connect_finished({
+          let failed = failed.clone();
+          move |download| {
+            if let Some(uri) = download.request().and_then(|req| req.uri()) {
+              let failed = *failed.borrow();
+              let uri = uri.to_string();
+              download_completed_handler(
+                uri,
+                (!failed)
+                  .then(|| download.destination().map(PathBuf::from))
+                  .flatten(),
+                !failed,
+              )
+            }
+          }
+        });
+      }
+    });
+  }
+}
+
+struct MainThreadRequest(URISchemeRequest);
+
+impl MainThreadRequest {
+  fn finish_with_response(&self, response: &URISchemeResponse) {
+    self.0.finish_with_response(response);
+  }
+}
+
+unsafe impl Send for MainThreadRequest {}
+unsafe impl Sync for MainThreadRequest {}