1 files changed, 434 insertions, 0 deletions
diff --git a/alacritty/src/window.rs b/alacritty/src/window.rs
new file mode 100644
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+++ b/alacritty/src/window.rs
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+// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+use std::convert::From;
+#[cfg(not(any(target_os = "macos", windows)))]
+use std::ffi::c_void;
+use std::fmt;
+
+use glutin::dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize};
+use glutin::event_loop::EventLoop;
+#[cfg(target_os = "macos")]
+use glutin::platform::macos::{RequestUserAttentionType, WindowBuilderExtMacOS, WindowExtMacOS};
+#[cfg(not(any(target_os = "macos", windows)))]
+use glutin::platform::unix::{EventLoopWindowTargetExtUnix, WindowBuilderExtUnix, WindowExtUnix};
+#[cfg(not(target_os = "macos"))]
+use glutin::window::Icon;
+use glutin::window::{CursorIcon, Fullscreen, Window as GlutinWindow, WindowBuilder, WindowId};
+use glutin::{self, ContextBuilder, PossiblyCurrent, WindowedContext};
+#[cfg(not(target_os = "macos"))]
+use image::ImageFormat;
+#[cfg(not(any(target_os = "macos", windows)))]
+use x11_dl::xlib::{Display as XDisplay, PropModeReplace, XErrorEvent, Xlib};
+
+use alacritty_terminal::config::{Decorations, StartupMode, WindowConfig, DEFAULT_NAME};
+use alacritty_terminal::event::Event;
+use alacritty_terminal::gl;
+use alacritty_terminal::term::{SizeInfo, Term};
+
+use crate::config::Config;
+
+// It's required to be in this directory due to the `windows.rc` file
+#[cfg(not(target_os = "macos"))]
+static WINDOW_ICON: &[u8] = include_bytes!("../../extra/windows/alacritty.ico");
+
+/// Window errors
+#[derive(Debug)]
+pub enum Error {
+    /// Error creating the window
+    ContextCreation(glutin::CreationError),
+
+    /// Error dealing with fonts
+    Font(font::Error),
+
+    /// Error manipulating the rendering context
+    Context(glutin::ContextError),
+}
+
+/// Result of fallible operations concerning a Window.
+type Result<T> = ::std::result::Result<T, Error>;
+
+impl ::std::error::Error for Error {
+    fn cause(&self) -> Option<&dyn (::std::error::Error)> {
+        match *self {
+            Error::ContextCreation(ref err) => Some(err),
+            Error::Context(ref err) => Some(err),
+            Error::Font(ref err) => Some(err),
+        }
+    }
+
+    fn description(&self) -> &str {
+        match *self {
+            Error::ContextCreation(ref _err) => "Error creating gl context",
+            Error::Context(ref _err) => "Error operating on render context",
+            Error::Font(ref err) => err.description(),
+        }
+    }
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            Error::ContextCreation(ref err) => write!(f, "Error creating GL context; {}", err),
+            Error::Context(ref err) => write!(f, "Error operating on render context; {}", err),
+            Error::Font(ref err) => err.fmt(f),
+        }
+    }
+}
+
+impl From<glutin::CreationError> for Error {
+    fn from(val: glutin::CreationError) -> Error {
+        Error::ContextCreation(val)
+    }
+}
+
+impl From<glutin::ContextError> for Error {
+    fn from(val: glutin::ContextError) -> Error {
+        Error::Context(val)
+    }
+}
+
+impl From<font::Error> for Error {
+    fn from(val: font::Error) -> Error {
+        Error::Font(val)
+    }
+}
+
+fn create_gl_window(
+    mut window: WindowBuilder,
+    event_loop: &EventLoop<Event>,
+    srgb: bool,
+    dimensions: Option<LogicalSize>,
+) -> Result<WindowedContext<PossiblyCurrent>> {
+    if let Some(dimensions) = dimensions {
+        window = window.with_inner_size(dimensions);
+    }
+
+    let windowed_context = ContextBuilder::new()
+        .with_srgb(srgb)
+        .with_vsync(true)
+        .with_hardware_acceleration(None)
+        .build_windowed(window, event_loop)?;
+
+    // Make the context current so OpenGL operations can run
+    let windowed_context = unsafe { windowed_context.make_current().map_err(|(_, e)| e)? };
+
+    Ok(windowed_context)
+}
+
+/// A window which can be used for displaying the terminal
+///
+/// Wraps the underlying windowing library to provide a stable API in Alacritty
+pub struct Window {
+    windowed_context: WindowedContext<PossiblyCurrent>,
+    current_mouse_cursor: CursorIcon,
+    mouse_visible: bool,
+}
+
+impl Window {
+    /// Create a new window
+    ///
+    /// This creates a window and fully initializes a window.
+    pub fn new(
+        event_loop: &EventLoop<Event>,
+        config: &Config,
+        logical: Option<LogicalSize>,
+    ) -> Result<Window> {
+        let title = config.window.title.as_ref().map_or(DEFAULT_NAME, |t| t);
+
+        let window_builder = Window::get_platform_window(title, &config.window);
+        let windowed_context =
+            create_gl_window(window_builder.clone(), &event_loop, false, logical)
+                .or_else(|_| create_gl_window(window_builder, &event_loop, true, logical))?;
+
+        // Text cursor
+        windowed_context.window().set_cursor_icon(CursorIcon::Text);
+
+        // Set OpenGL symbol loader. This call MUST be after window.make_current on windows.
+        gl::load_with(|symbol| windowed_context.get_proc_address(symbol) as *const _);
+
+        // On X11, embed the window inside another if the parent ID has been set
+        #[cfg(not(any(target_os = "macos", windows)))]
+        {
+            if event_loop.is_x11() {
+                if let Some(parent_window_id) = config.window.embed {
+                    x_embed_window(windowed_context.window(), parent_window_id);
+                }
+            }
+        }
+
+        Ok(Window {
+            current_mouse_cursor: CursorIcon::Default,
+            mouse_visible: true,
+            windowed_context,
+        })
+    }
+
+    pub fn set_inner_size(&mut self, size: LogicalSize) {
+        self.window().set_inner_size(size);
+    }
+
+    pub fn inner_size(&self) -> LogicalSize {
+        self.window().inner_size()
+    }
+
+    pub fn hidpi_factor(&self) -> f64 {
+        self.window().hidpi_factor()
+    }
+
+    #[inline]
+    pub fn set_visible(&self, visibility: bool) {
+        self.window().set_visible(visibility);
+    }
+
+    /// Set the window title
+    #[inline]
+    pub fn set_title(&self, title: &str) {
+        self.window().set_title(title);
+    }
+
+    #[inline]
+    pub fn set_mouse_cursor(&mut self, cursor: CursorIcon) {
+        if cursor != self.current_mouse_cursor {
+            self.current_mouse_cursor = cursor;
+            self.window().set_cursor_icon(cursor);
+        }
+    }
+
+    /// Set mouse cursor visible
+    pub fn set_mouse_visible(&mut self, visible: bool) {
+        if visible != self.mouse_visible {
+            self.mouse_visible = visible;
+            self.window().set_cursor_visible(visible);
+        }
+    }
+
+    #[cfg(not(any(target_os = "macos", windows)))]
+    pub fn get_platform_window(title: &str, window_config: &WindowConfig) -> WindowBuilder {
+        let decorations = match window_config.decorations {
+            Decorations::None => false,
+            _ => true,
+        };
+
+        let image = image::load_from_memory_with_format(WINDOW_ICON, ImageFormat::ICO)
+            .expect("loading icon")
+            .to_rgba();
+        let (width, height) = image.dimensions();
+        let icon = Icon::from_rgba(image.into_raw(), width, height);
+
+        let class = &window_config.class;
+
+        let mut builder = WindowBuilder::new()
+            .with_title(title)
+            .with_visible(false)
+            .with_transparent(true)
+            .with_decorations(decorations)
+            .with_maximized(window_config.startup_mode() == StartupMode::Maximized)
+            .with_window_icon(icon.ok())
+            // X11
+            .with_class(class.instance.clone(), class.general.clone())
+            // Wayland
+            .with_app_id(class.instance.clone());
+
+        if let Some(ref val) = window_config.gtk_theme_variant {
+            builder = builder.with_gtk_theme_variant(val.clone())
+        }
+
+        builder
+    }
+
+    #[cfg(windows)]
+    pub fn get_platform_window(title: &str, window_config: &WindowConfig) -> WindowBuilder {
+        let decorations = match window_config.decorations {
+            Decorations::None => false,
+            _ => true,
+        };
+
+        let image = image::load_from_memory_with_format(WINDOW_ICON, ImageFormat::ICO)
+            .expect("loading icon")
+            .to_rgba();
+        let (width, height) = image.dimensions();
+        let icon = Icon::from_rgba(image.into_raw(), width, height);
+
+        WindowBuilder::new()
+            .with_title(title)
+            .with_visible(true)
+            .with_decorations(decorations)
+            .with_transparent(true)
+            .with_maximized(window_config.startup_mode() == StartupMode::Maximized)
+            .with_window_icon(icon.ok())
+    }
+
+    #[cfg(target_os = "macos")]
+    pub fn get_platform_window(title: &str, window_config: &WindowConfig) -> WindowBuilder {
+        let window = WindowBuilder::new()
+            .with_title(title)
+            .with_visible(false)
+            .with_transparent(true)
+            .with_maximized(window_config.startup_mode() == StartupMode::Maximized);
+
+        match window_config.decorations {
+            Decorations::Full => window,
+            Decorations::Transparent => window
+                .with_title_hidden(true)
+                .with_titlebar_transparent(true)
+                .with_fullsize_content_view(true),
+            Decorations::Buttonless => window
+                .with_title_hidden(true)
+                .with_titlebar_buttons_hidden(true)
+                .with_titlebar_transparent(true)
+                .with_fullsize_content_view(true),
+            Decorations::None => window.with_titlebar_hidden(true),
+        }
+    }
+
+    #[cfg(not(any(target_os = "macos", windows)))]
+    pub fn set_urgent(&self, is_urgent: bool) {
+        self.window().set_urgent(is_urgent);
+    }
+
+    #[cfg(target_os = "macos")]
+    pub fn set_urgent(&self, is_urgent: bool) {
+        if !is_urgent {
+            return;
+        }
+
+        self.window().request_user_attention(RequestUserAttentionType::Critical);
+    }
+
+    #[cfg(windows)]
+    pub fn set_urgent(&self, _is_urgent: bool) {}
+
+    pub fn set_outer_position(&self, pos: LogicalPosition) {
+        self.window().set_outer_position(pos);
+    }
+
+    #[cfg(not(any(target_os = "macos", windows)))]
+    pub fn x11_window_id(&self) -> Option<usize> {
+        self.window().xlib_window().map(|xlib_window| xlib_window as usize)
+    }
+
+    pub fn window_id(&self) -> WindowId {
+        self.window().id()
+    }
+
+    #[cfg(not(any(target_os = "macos", windows)))]
+    pub fn set_maximized(&self, maximized: bool) {
+        self.window().set_maximized(maximized);
+    }
+
+    /// Toggle the window's fullscreen state
+    pub fn toggle_fullscreen(&mut self) {
+        self.set_fullscreen(self.window().fullscreen().is_none());
+    }
+
+    #[cfg(target_os = "macos")]
+    pub fn toggle_simple_fullscreen(&mut self) {
+        self.set_simple_fullscreen(!self.window().simple_fullscreen());
+    }
+
+    pub fn set_fullscreen(&mut self, fullscreen: bool) {
+        #[cfg(macos)]
+        {
+            if self.window().simple_fullscreen() {
+                return;
+            }
+        }
+
+        if fullscreen {
+            let current_monitor = self.window().current_monitor();
+            self.window().set_fullscreen(Some(Fullscreen::Borderless(current_monitor)));
+        } else {
+            self.window().set_fullscreen(None);
+        }
+    }
+
+    #[cfg(target_os = "macos")]
+    pub fn set_simple_fullscreen(&mut self, simple_fullscreen: bool) {
+        if self.window().fullscreen().is_some() {
+            return;
+        }
+
+        self.window().set_simple_fullscreen(simple_fullscreen);
+    }
+
+    #[cfg(not(any(target_os = "macos", target_os = "windows")))]
+    pub fn wayland_display(&self) -> Option<*mut c_void> {
+        self.window().wayland_display()
+    }
+
+    /// Adjust the IME editor position according to the new location of the cursor
+    #[cfg(not(windows))]
+    pub fn update_ime_position<T>(&mut self, terminal: &Term<T>, size_info: &SizeInfo) {
+        let point = terminal.cursor().point;
+        let SizeInfo { cell_width: cw, cell_height: ch, padding_x: px, padding_y: py, dpr, .. } =
+            size_info;
+
+        let nspot_x = f64::from(px + point.col.0 as f32 * cw);
+        let nspot_y = f64::from(py + (point.line.0 + 1) as f32 * ch);
+
+        self.window().set_ime_position(PhysicalPosition::from((nspot_x, nspot_y)).to_logical(*dpr));
+    }
+
+    pub fn swap_buffers(&self) {
+        self.windowed_context.swap_buffers().expect("swap buffers");
+    }
+
+    pub fn resize(&self, size: PhysicalSize) {
+        self.windowed_context.resize(size);
+    }
+
+    fn window(&self) -> &GlutinWindow {
+        self.windowed_context.window()
+    }
+}
+
+#[cfg(not(any(target_os = "macos", windows)))]
+fn x_embed_window(window: &GlutinWindow, parent_id: u64) {
+    let (xlib_display, xlib_window) = match (window.xlib_display(), window.xlib_window()) {
+        (Some(display), Some(window)) => (display, window),
+        _ => return,
+    };
+
+    let xlib = Xlib::open().expect("get xlib");
+
+    unsafe {
+        let atom = (xlib.XInternAtom)(xlib_display as *mut _, "_XEMBED".as_ptr() as *const _, 0);
+        (xlib.XChangeProperty)(
+            xlib_display as _,
+            xlib_window as _,
+            atom,
+            atom,
+            32,
+            PropModeReplace,
+            [0, 1].as_ptr(),
+            2,
+        );
+
+        // Register new error handler
+        let old_handler = (xlib.XSetErrorHandler)(Some(xembed_error_handler));
+
+        // Check for the existence of the target before attempting reparenting
+        (xlib.XReparentWindow)(xlib_display as _, xlib_window as _, parent_id, 0, 0);
+
+        // Drain errors and restore original error handler
+        (xlib.XSync)(xlib_display as _, 0);
+        (xlib.XSetErrorHandler)(old_handler);
+    }
+}
+
+#[cfg(not(any(target_os = "macos", windows)))]
+unsafe extern "C" fn xembed_error_handler(_: *mut XDisplay, _: *mut XErrorEvent) -> i32 {
+    println!("Could not embed into specified window.");
+    std::process::exit(1);
+}