64febfbe9a
Add an implementation of CSS `contain: style`. This introduces two new data structures, the ContainStyleScope and ContainStyleScopeManager. ContainStyleScope manages one `contain: style` "world" which has its own counter and quote lists. The contents of these lists depend on their parent scopes, but are not affected by their children. ContainStyleScopeManager manages a tree of scopes starting at a root scope which is outside of any `contain: style` element. Scopes are stored in a hash table that is keyed off of the nsIContent which establishes the `contain: style` scope. When modifying quote or content lists, the ContainStyleScopeManager is responsible for finding the appropriate `contain: style` scope to modify. Perhaps the most complex part of this is that counters and quotes have read access to the state of counters and quotes that are in ancestor `contain: style` scopes. In the case of counters, USE nodes that are at the beginning of counter lists might have a counter scope that starts in an ancestor `contain: style` scope. When nsCounterNode::SetScope() is called, the code may look upward in the `contain: style` scope tree to find the start of the counter scope. In the case of quotes, the first node in the quote list must look for the state of quotes in ancestor `contain: style` scopes. Differential Revision: https://phabricator.services.mozilla.com/D149508 |
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| .cargo | ||
| .github | ||
| .vscode | ||
| components | ||
| docs | ||
| etc | ||
| ports | ||
| python | ||
| resources | ||
| support | ||
| tests | ||
| third_party | ||
| .clang-format | ||
| .flake8 | ||
| .gitattributes | ||
| .gitignore | ||
| .hgignore | ||
| .mailmap | ||
| Cargo.lock | ||
| Cargo.toml | ||
| CLOBBER | ||
| CONTRIBUTING.md | ||
| dependencyci.yml | ||
| Info.plist | ||
| LICENSE | ||
| mach | ||
| mach.bat | ||
| PULL_REQUEST_TEMPLATE.md | ||
| README.md | ||
| rust-toolchain.toml | ||
| rustfmt.toml | ||
| servo-tidy.toml | ||
| servobuild.example | ||
| taplo.toml | ||
The Servo Parallel Browser Engine Project
Servo is a prototype web browser engine written in the Rust language. It is currently developed on 64-bit macOS, 64-bit Linux, 64-bit Windows, and Android.
Servo welcomes contribution from everyone. See
CONTRIBUTING.md and HACKING_QUICKSTART.md
for help getting started.
Visit the Servo Project page for news and guides.
Build Setup
If these instructions fail or you would like to install dependencies manually, try the manual build setup.
macOS
- Install Xcode
- Install Homebrew
- Run
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh - Run
pip install virtualenv - Run
./mach bootstrap
Note: This will install the recommended version of GStreamer globally on your system.
Linux
- Run
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh - Install Python and virtualenv
- Debian-like: Run
sudo apt install python3-virtualenv python3-pip - Fedora: Run
sudo dnf install python3 python3-virtualenv python3-pip python3-devel - Arch: Run
sudo pacman -S --needed python python-virtualenv python-pip - Gentoo: Run
sudo emerge dev-python/virtualenv dev-python/pip
- Debian-like: Run
- Run
./mach bootstrap
Windows
- Download and run
rustup-init.exethen follow the onscreen instructions. - Install chocolatey
- Run
mach bootstrap - This will install CMake, Git, Ninja, Python and the Visual Studio 2019 Build Tools via choco in an Administrator console. It can take quite a while.
- If you already have Visual Studio 2019 installed, this may not install all necessary components. Please follow the Visual Studio 2019 installation instructions in the manual setup.
- Run
refreshenv
See also Windows Troubleshooting Tips.
Cloning the Repo
Your CARGO_HOME needs to point to (or be in) the same drive as your Servo repository (See #28530).
git clone https://github.com/servo/servo
cd servo
Building
Servo is built with Cargo, the Rust package manager. We also use Mozilla's Mach tools to orchestrate the build and other tasks. You can call Mach like this:
On Unix systems:
./mach [command] [arguments]
On Windows Commandline:
mach.bat [command] [arguments]
The examples below will use Unix, but the same applies to Windows.
The Rust compiler
Servo's build system uses rustup.rs to automatically download a Rust compiler.
This is a specific version of Rust Nightly determined by the
rust-toolchain file.
Normal build
To build Servo in development mode. This is useful for development, but the resulting binary is very slow:
./mach build --dev
./mach run tests/html/about-mozilla.html
Release build
For benchmarking, performance testing, or real-world use.
Add the --release flag to create an optimized build:
./mach build --release
./mach run --release tests/html/about-mozilla.html
Checking for build errors, without building
If you’re making changes to one crate that cause build errors in another crate, consider this instead of a full build:
./mach check
It will run cargo check, which runs the analysis phase of the compiler
(and so shows build errors if any) but skips the code generation phase.
This can be a lot faster than a full build,
though of course it doesn’t produce a binary you can run.
Building for Android target
For ARM (armv7-linux-androideabi, most phones):
./mach build --release --android
./mach package --release --android
For x86 (typically for the emulator):
./mach build --release --target i686-linux-android
./mach package --release --target i686-linux-android
Running
Run Servo with the command:
./servo [url] [arguments] # if you run with nightly build
./mach run [url] [arguments] # if you run with mach
# For example
./mach run https://www.google.com
Commandline Arguments
-p INTERVALturns on the profiler and dumps info to the console everyINTERVALseconds-s SIZEsets the tile size for painting; defaults to 512-zdisables all graphical output; useful for running JS / layout tests-Z helpdisplays useful output to debug servo
Keyboard Shortcuts
Ctrl+Lopens URL prompt (Cmd+Lon Mac)Ctrl+Rreloads current page (Cmd+Ron Mac)Ctrl+-zooms out (Cmd+-on Mac)Ctrl+=zooms in (Cmd+=on Mac)Alt+left arrowgoes backwards in the history (Cmd+left arrowon Mac)Alt+right arrowgoes forwards in the history (Cmd+right arrowon Mac)EscorCtrl+Qexits Servo (Cmd+Qon Mac)
Runtime dependencies
Linux
GStreamer>=1.16gst-plugins-bad>=1.16libXcursorlibXrandrlibXilibxkbcommonvulkan-loader
Developing
There are lots of mach commands you can use. You can list them with ./mach --help.
The generated documentation can be found on https://doc.servo.org/servo/index.html