winit: initial minibrowser (#29976)

* winit: add minibrowser feature that depends on egui{,-winit}

* winit: carve out some space at the top of headed windows

* winit: minimal toolbar and egui/winit integration (but no painting)

* winit: try to paint with egui_glow (doesn’t work yet)

* winit: add comment about toolbar size

* Add framebuffer object, set it as glow's target

* compositing: clear only the viewport, not the whole framebuffer

* plumb the actual size of the egui toolbar to webrender

* fix formatting

* winit: fix crash when fbo is zero

* winit: don’t bother binding the framebuffer object

* winit: remove unsafe and get toolbar_height

* winit: location field should reflect the current top-level url

* [NFC] winit: move Minibrowser out of App::run

* winit: clean up toolbar height code

* winit: make App own the Minibrowser if any

* winit: make the go button work

* winit:make the location field reflect the current top-level url

* winit: allow enabling minibrowser from command line

* winit: tell compositor to repaint WR and flush when we repaint

* winit: fix bug where location field edits would get overridden

* winit: borrow the minibrowser once in App::handle_events

* winit: address todo about viewport origin coordinates

* winit: fix some minor problems with comments and errors

* winit: update location field once per HistoryChanged event

* winit: rename Window::set_toolbar_size to set_toolbar_height

* winit: take toolbar height into account in hit testing

* winit: pass egui only relevant CursorMoved events

* winit: scratch that, coalesce minibrowser updates instead

* ensure both minibrowser and WR are repainted on every frame

* compositing: only skip framebuffer clear in external present mode

* winit: destroy egui glow Painter when shutting down

* winit: clean up and fix license lint

* fix duplicate versions lint by downgrading bytemuck_derive

was egui_glow ^0.22.0 (0.22.0)
→ egui/bytemuck ^0.22.0 (0.22.0)
→ epaint/bytemuck ^0.22.0 (0.22.0)
→ bytemuck ^1.7.2 (1.13.1)
→ bytemuck_derive ^1.4 (1.4.1)
→ syn ^2.0.1 (2.0.28)

now lock has bytemuck_derive 1.4.0
→ syn ^1.0.99 (1.0.103)

* fix duplicate versions lint by disabling egui-winit/links

(we don’t need support for hyperlinks in our use of egui)

* squelch duplicate versions lint by excluding clipboard-win

* winit: fix compile warnings

* winit: make gleam an optional dependency under /minibrowser

* winit: remove cargo feature, since it’s not really optional

* winit: extract Minibrowser and related code to separate module

* winit: remove unnecessary trailing comma

* winit: simplify the ServoUrl serialisation optimisation

---------

Co-authored-by: atbrakhi <atbrakhi@igalia.com>

Cargo.lock

@@ -48,6 +48,17 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
 
+[[package]]
+name = "ahash"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c99f64d1e06488f620f932677e24bc6e2897582980441ae90a671415bd7ec2f"
+dependencies = [
+ "cfg-if 1.0.0",
+ "once_cell",
+ "version_check",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"
@@ -145,6 +156,24 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "arboard"
+version = "3.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6041616acea41d67c4a984709ddab1587fd0b10efe5cc563fee954d2f011854"
+dependencies = [
+ "clipboard-win 4.5.0",
+ "log",
+ "objc",
+ "objc-foundation",
+ "objc_id",
+ "once_cell",
+ "parking_lot 0.12.0",
+ "thiserror",
+ "winapi",
+ "x11rb",
+]
+
 [[package]]
 name = "array-init"
 version = "0.1.1"
@@ -555,6 +584,20 @@ name = "bytemuck"
 version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17febce684fd15d89027105661fec94afb475cb995fbc59d2865198446ba2eea"
+dependencies = [
+ "bytemuck_derive",
+]
+
+[[package]]
+name = "bytemuck_derive"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aca418a974d83d40a0c1f0c5cba6ff4bc28d8df099109ca459a2118d40b6322"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
 
 [[package]]
 name = "byteorder"
@@ -784,7 +827,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "25a904646c0340239dcf7c51677b33928bf24fdf424b79a57909c0109075b2e7"
 dependencies = [
- "clipboard-win",
+ "clipboard-win 2.2.0",
  "objc",
  "objc-foundation",
  "objc_id",
@@ -800,6 +843,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "clipboard-win"
+version = "4.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7191c27c2357d9b7ef96baac1773290d4ca63b24205b82a3fd8a0637afcf0362"
+dependencies = [
+ "error-code",
+ "str-buf",
+ "winapi",
+]
+
 [[package]]
 name = "cmake"
 version = "0.1.50"
@@ -1453,12 +1507,73 @@ dependencies = [
  "wio",
 ]
 
+[[package]]
+name = "ecolor"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e479a7fa3f23d4e794f8b2f8b3568dd4e47886ad1b12c9c095e141cb591eb63"
+dependencies = [
+ "bytemuck",
+]
+
+[[package]]
+name = "egui"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3aef8ec3ae1b772f340170c65bf27d5b8c28f543a0116c844d2ac08d01123e7"
+dependencies = [
+ "ahash",
+ "epaint",
+ "log",
+ "nohash-hasher",
+]
+
+[[package]]
+name = "egui-winit"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a49155fd4a0a4fb21224407a91de0030847972ef90fc64edb63621caea61cb2"
+dependencies = [
+ "arboard",
+ "egui",
+ "instant",
+ "log",
+ "raw-window-handle 0.5.0",
+ "smithay-clipboard",
+ "winit",
+]
+
+[[package]]
+name = "egui_glow"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f8c2752cdf1b0ef5fcda59a898cacabad974d4f5880e92a420b2c917022da64"
+dependencies = [
+ "bytemuck",
+ "egui",
+ "egui-winit",
+ "glow",
+ "log",
+ "memoffset",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "either"
 version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
+[[package]]
+name = "emath"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3857d743a6e0741cdd60b622a74c7a36ea75f5f8f11b793b41d905d2c9721a4b"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "embedder_traits"
 version = "0.0.1"
@@ -1537,6 +1652,23 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "epaint"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09333964d4d57f40a85338ba3ca5ed4716070ab184dcfed966b35491c5c64f3b"
+dependencies = [
+ "ab_glyph",
+ "ahash",
+ "atomic_refcell",
+ "bytemuck",
+ "ecolor",
+ "emath",
+ "log",
+ "nohash-hasher",
+ "parking_lot 0.12.0",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.0"
@@ -1558,6 +1690,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "error-code"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64f18991e7bf11e7ffee451b5318b5c1a73c52d0d0ada6e5a3017c8c1ced6a21"
+dependencies = [
+ "libc",
+ "str-buf",
+]
+
 [[package]]
 name = "euclid"
 version = "0.22.7"
@@ -1892,6 +2034,16 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "gethostname"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1ebd34e35c46e00bb73e81363248d627782724609fe1b6396f553f68fe3862e"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "getopts"
 version = "0.2.17"
@@ -2201,6 +2353,18 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 
+[[package]]
+name = "glow"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca0fe580e4b60a8ab24a868bc08e2f03cbcb20d3d676601fa909386713333728"
+dependencies = [
+ "js-sys",
+ "slotmap",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "glslopt"
 version = "0.1.9"
@@ -3958,6 +4122,12 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 
+[[package]]
+name = "nohash-hasher"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bf50223579dc7cdcfb3bfcacf7069ff68243f8c363f62ffa99cf000a6b9c451"
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -5284,8 +5454,13 @@ dependencies = [
  "backtrace",
  "cc",
  "clipboard",
+ "egui",
+ "egui-winit",
+ "egui_glow",
  "euclid",
  "getopts",
+ "gleam",
+ "glow",
  "image 0.24.6",
  "keyboard-types",
  "lazy_static",
@@ -5790,6 +5965,16 @@ dependencies = [
  "wayland-protocols",
 ]
 
+[[package]]
+name = "smithay-clipboard"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a345c870a1fae0b1b779085e81b51e614767c239e93503588e54c5b17f4b0e8"
+dependencies = [
+ "smithay-client-toolkit",
+ "wayland-client",
+]
+
 [[package]]
 name = "socket2"
 version = "0.4.9"
@@ -5873,6 +6058,12 @@ dependencies = [
  "lock_api",
 ]
 
+[[package]]
+name = "str-buf"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e08d8363704e6c71fc928674353e6b7c23dcea9d82d7012c8faf2a3a025f8d0"
+
 [[package]]
 name = "strict-num"
 version = "0.1.0"
@@ -7155,6 +7346,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "winapi-wsapoll"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44c17110f57155602a80dca10be03852116403c9ff3cd25b079d666f2aa3df6e"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
@@ -7336,6 +7536,28 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "x11rb"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "592b4883219f345e712b3209c62654ebda0bb50887f330cbd018d0f654bfd507"
+dependencies = [
+ "gethostname",
+ "nix 0.24.3",
+ "winapi",
+ "winapi-wsapoll",
+ "x11rb-protocol",
+]
+
+[[package]]
+name = "x11rb-protocol"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56b245751c0ac9db0e006dc812031482784e434630205a93c73cfefcaabeac67"
+dependencies = [
+ "nix 0.24.3",
+]
+
 [[package]]
 name = "xcb"
 version = "0.8.2"