Grcov report - properties.rs

1

//! CSS properties, specified values, computed values.

2

//!

3

//! To implement support for a CSS property, do the following:

4

//!

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//! * Create a type that will hold the property's values.  Please do this in the file

6

//! `property_defs.rs`; you should cut-and-paste from the existing property definitions or

7

//! read the documentation of the [`make_property`] macro.  You should read the

8

//! documentation for the [`property_defs`][crate::property_defs] module to see all that

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//! is involved in creating a type for a property.

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//!

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//! * Modify the call to the `make_properties` macro in this module to include the new

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//! property's name.

13

//!

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//! * Modify the rest of librsvg wherever the computed value of the property needs to be used.

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//! This is available in methods that take an argument of type [`ComputedValues`].

16

17

use cssparser::{

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    self, BasicParseErrorKind, ParseErrorKind, Parser, ParserInput, RuleBodyParser, ToCss,

19

};

20

use markup5ever::{

21

    expanded_name, local_name, namespace_url, ns, ExpandedName, LocalName, QualName,

22

};

23

use std::collections::HashSet;

24

25

#[cfg(doc)]

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use crate::make_property;

27

28

use crate::css::{DeclParser, Declaration, Origin, RuleBodyItem};

29

use crate::error::*;

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use crate::parsers::{Parse, ParseValue};

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use crate::property_macros::Property;

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use crate::rsvg_log;

33

use crate::session::Session;

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use crate::transform::{Transform, TransformAttribute, TransformProperty};

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use crate::xml::Attributes;

36

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// Re-export the actual properties so they are easy to find from a single place `properties::*`.

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pub use crate::font_props::*;

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pub use crate::property_defs::*;

40

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/// Representation of a single CSS property value.

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///

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/// `Unspecified` is the `Default`; it means that the corresponding property is not present.

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///

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/// `Inherit` means that the property is explicitly set to inherit

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/// from the parent element.  This is useful for properties which the

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/// SVG or CSS specs mandate that should not be inherited by default.

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///

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/// `Specified` is a value given by the SVG or CSS stylesheet.  This will later be

50

/// resolved into part of a `ComputedValues` struct.

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1460571

#[derive(Clone)]

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pub enum SpecifiedValue<T>

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where

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    T: Property + Clone + Default,

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    Unspecified,

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    Inherit,

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1518001

    Specified(T),

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60

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impl<T> SpecifiedValue<T>

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where

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    T: Property + Clone + Default,

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65

95380296

    pub fn compute(&self, src: &T, src_values: &ComputedValues) -> T {

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95380296

        let value: T = match *self {

67

            SpecifiedValue::Unspecified => {

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93983131

                if <T as Property>::inherits_automatically() {

69

50891033

                    src.clone()

70

                } else {

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43092098

                    Default::default()

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73

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75

42

            SpecifiedValue::Inherit => src.clone(),

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1397123

            SpecifiedValue::Specified(ref v) => v.clone(),

78

};

79

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95380296

        value.compute(src_values)

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95380296

82

83

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/// Whether a property also has a presentation attribute.

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///

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/// <https://svgwg.org/svg2-draft/styling.html#PresentationAttributes>

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24205

#[derive(PartialEq)]

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enum PresentationAttr {

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No,

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    Yes,

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92

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/// How to parse a value, whether it comes from a property or from a presentation attribute

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57467

#[derive(PartialEq)]

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pub enum ParseAs {

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    Property,

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    PresentationAttr,

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99

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impl PropertyId {

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97224824

    fn as_u8(&self) -> u8 {

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97224824

        *self as u8

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97224824

104

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96452602

    fn as_usize(&self) -> usize {

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96452602

        *self as usize

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96452602

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/// Holds the specified values for the CSS properties of an element.

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#[derive(Clone)]

112

pub struct SpecifiedValues {

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    indices: [u8; PropertyId::UnsetProperty as usize],

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    props: Vec<ParsedProperty>,

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    transform: Option<Transform>,

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118

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impl Default for SpecifiedValues {

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1022284

    fn default() -> Self {

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1022284

        SpecifiedValues {

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            // this many elements, with the same value

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1022284

            indices: [PropertyId::UnsetProperty.as_u8(); PropertyId::UnsetProperty as usize],

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1022284

            props: Vec::new(),

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1022284

            transform: None,

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1022284

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impl ComputedValues {

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    // TODO for madds: this function will go away, to be replaced by the one generated

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    // automatically by the macros.

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1954311

    pub fn transform(&self) -> Transform {

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1954311

        self.transform

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1954311

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137

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    pub fn is_overflow(&self) -> bool {

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        matches!(self.overflow(), Overflow::Auto | Overflow::Visible)

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193

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    /// Whether we should draw the element or skip both space allocation

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    /// and drawing.

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    /// <https://www.w3.org/TR/SVG2/render.html#VisibilityControl>

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1957653

    pub fn is_displayed(&self) -> bool {

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1957653

        self.display() != Display::None

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1957653

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    /// Whether we should draw the element or allocate its space but

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    /// skip drawing.

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    /// <https://www.w3.org/TR/SVG2/render.html#VisibilityControl>

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949596

    pub fn is_visible(&self) -> bool {

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949596

        self.visibility() == Visibility::Visible

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949596

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/// Macro to generate all the machinery for properties.

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///

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/// This generates the following:

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///

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/// * `PropertyId`, an fieldless enum with simple values to identify all the properties.

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/// * `ParsedProperty`, a variant enum for all the specified property values.

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/// * `ComputedValue`, a variant enum for all the computed values.

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/// * `parse_value`, the main function to parse a property or attribute value from user input.

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///

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/// There is a lot of repetitive code, for example, because sometimes

166

/// we need to operate on `PropertyId::Foo`, `ParsedProperty::Foo` and

167

/// `ComputedValue::Foo` together.  This is why all this is done with a macro.

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///

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/// See the only invocation of this macro to see how it is used; it is just

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/// a declarative list of property names.

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///

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/// **NOTE:** If you get a compiler error similar to this:

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///

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/// ```text

175

/// 362 |         "mix-blend-mode"              => mix_blend_mode              : MixBlendMode,

176

///     |         ^^^^^^^^^^^^^^^^ no rules expected this token in macro call

177

/// ```

178

///

179

/// Then it may be that you put the name inside the `longhands` block, when it should be

180

/// inside the `longhands_not_supported_by_markup5ever` block.  This is because the

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/// [`markup5ever`] crate does not have predefined names for every single property out

182

/// there; just the common ones.

183

///

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/// [`markup5ever`]: https://docs.rs/markup5ever

185

macro_rules! make_properties {

186

187

        shorthands: {

188

            $($short_str:tt => ( $short_presentation_attr:expr, $short_field:ident: $short_name:ident ),)*

189

190

191

        longhands: {

192

            $($long_str:tt => ( $long_presentation_attr:expr, $long_field:ident: $long_name:ident ),)+

193

194

195

        // These are for when expanded_name!("" "foo") is not defined yet

196

        // in markup5ever.  We create an ExpandedName by hand in that case.

197

        longhands_not_supported_by_markup5ever: {

198

            $($long_m5e_str:tt => ($long_m5e_presentation_attr:expr, $long_m5e_field:ident: $long_m5e_name:ident ),)+

199

200

201

        non_properties: {

202

            $($nonprop_field:ident: $nonprop_name:ident,)+

203

204

    }=> {

205

        /// Used to match `ParsedProperty` to their discriminant

206

///

207

        /// The `PropertyId::UnsetProperty` can be used as a sentinel value, as

208

        /// it does not match any `ParsedProperty` discriminant; it is really the

209

        /// number of valid values in this enum.

210

        #[repr(u8)]

211

        #[derive(Copy, Clone, PartialEq)]

212

        enum PropertyId {

213

            $($short_name,)+

214

            $($long_name,)+

215

            $($long_m5e_name,)+

216

            $($nonprop_name,)+

217

218

            UnsetProperty,

219

220

221

        impl PropertyId {

222

239262336

            fn is_shorthand(self) -> bool {

223

239262336

                match self {

224

                    $(PropertyId::$short_name => true,)+

225

239262336

                    _ => false,

226

227

239262336

228

229

230

        /// Embodies "which property is this" plus the property's value

231

1460568

        #[derive(Clone)]

232

        pub enum ParsedProperty {

233

            // we put all the properties here; these are for SpecifiedValues

234

            $($short_name(SpecifiedValue<$short_name>),)+

235

1457398

            $($long_name(SpecifiedValue<$long_name>),)+

236

3103

            $($long_m5e_name(SpecifiedValue<$long_m5e_name>),)+

237

67

            $($nonprop_name(SpecifiedValue<$nonprop_name>),)+

238

239

240

        enum ComputedValue {

241

$(

242

                $long_name($long_name),

243

)+

244

245

$(

246

                $long_m5e_name($long_m5e_name),

247

)+

248

249

$(

250

                $nonprop_name($nonprop_name),

251

)+

252

253

254

        /// Holds the computed values for the CSS properties of an element.

255

5028410

        #[derive(Debug, Default, Clone)]

256

        pub struct ComputedValues {

257

$(

258

2514728

                $long_field: $long_name,

259

)+

260

261

$(

262

2514662

                $long_m5e_field: $long_m5e_name,

263

)+

264

265

$(

266

2514691

                $nonprop_field: $nonprop_name,

267

)+

268

269

2514675

            transform: Transform,

270

271

272

        impl ParsedProperty {

273

63429

            fn get_property_id(&self) -> PropertyId {

274

63429

                match *self {

275

61596

                    $(ParsedProperty::$long_name(_) => PropertyId::$long_name,)+

276

1805

                    $(ParsedProperty::$long_m5e_name(_) => PropertyId::$long_m5e_name,)+

277

                    $(ParsedProperty::$short_name(_) => PropertyId::$short_name,)+

278

28

                    $(ParsedProperty::$nonprop_name(_) => PropertyId::$nonprop_name,)+

279

280

63429

281

282

94944747

            fn unspecified(id: PropertyId) -> Self {

283

                use SpecifiedValue::Unspecified;

284

285

94944747

                match id {

286

83187485

                    $(PropertyId::$long_name => ParsedProperty::$long_name(Unspecified),)+

287

8800971

                    $(PropertyId::$long_m5e_name => ParsedProperty::$long_m5e_name(Unspecified),)+

288

                    $(PropertyId::$short_name => ParsedProperty::$short_name(Unspecified),)+

289

2956291

                    $(PropertyId::$nonprop_name => ParsedProperty::$nonprop_name(Unspecified),)+

290

291

                    PropertyId::UnsetProperty => unreachable!(),

292

293

94944747

294

295

296

        impl ComputedValues {

297

$(

298

128117278

                pub fn $long_field(&self) -> $long_name {

299

128117278

                    if let ComputedValue::$long_name(v) = self.get_value(PropertyId::$long_name) {

300

301

                    } else {

302

                        unreachable!();

303

304

128117278

305

)+

306

307

$(

308

17099759

                pub fn $long_m5e_field(&self) -> $long_m5e_name {

309

17099759

                    if let ComputedValue::$long_m5e_name(v) = self.get_value(PropertyId::$long_m5e_name) {

310

311

                    } else {

312

                        unreachable!();

313

314

17099759

315

)+

316

317

$(

318

2979583

                pub fn $nonprop_field(&self) -> $nonprop_name {

319

2979583

                    if let ComputedValue::$nonprop_name(v) = self.get_value(PropertyId::$nonprop_name) {

320

321

                    } else {

322

                        unreachable!();

323

324

2979583

325

)+

326

327

95401431

            fn set_value(&mut self, computed: ComputedValue) {

328

95401431

                match computed {

329

83621720

                    $(ComputedValue::$long_name(v) => self.$long_field = v,)+

330

8802276

                    $(ComputedValue::$long_m5e_name(v) => self.$long_m5e_field = v,)+

331

2977435

                    $(ComputedValue::$nonprop_name(v) => self.$nonprop_field = v,)+

332

333

95401431

334

335

148188378

            fn get_value(&self, id: PropertyId) -> ComputedValue {

336

148188378

                assert!(!id.is_shorthand());

337

338

148188378

                match id {

339

$(

340

                        PropertyId::$long_name =>

341

128111034

                            ComputedValue::$long_name(self.$long_field.clone()),

342

)+

343

$(

344

                        PropertyId::$long_m5e_name =>

345

17097750

                            ComputedValue::$long_m5e_name(self.$long_m5e_field.clone()),

346

)+

347

$(

348

                        PropertyId::$nonprop_name =>

349

2979594

                            ComputedValue::$nonprop_name(self.$nonprop_field.clone()),

350

)+

351

                    _ => unreachable!(),

352

353

148188378

354

355

356

        /// Parses a value from either a style property or from an element's attribute.

357

123757

        pub fn parse_value<'i>(

358

            prop_name: &QualName,

359

            input: &mut Parser<'i, '_>,

360

            parse_as: ParseAs,

361

        ) -> Result<ParsedProperty, ParseError<'i>> {

362

191352

            match prop_name.expanded() {

363

$(

364

54398

                    expanded_name!("", $long_str) if !(parse_as == ParseAs::PresentationAttr && $long_presentation_attr == PresentationAttr::No) => {

365

54398

                        Ok(ParsedProperty::$long_name(parse_input(input)?))

366

54381

367

)+

368

369

$(

370

480640

                    e if e == ExpandedName {

371

478868

                        ns: &ns!(),

372

478868

                        local: &LocalName::from($long_m5e_str),

373

478160

                    } && !(parse_as == ParseAs::PresentationAttr && $long_m5e_presentation_attr == PresentationAttr::No) => {

374

1772

                        Ok(ParsedProperty::$long_m5e_name(parse_input(input)?))

375

1772

376

)+

377

378

$(

379

1397

                    expanded_name!("", $short_str) if parse_as == ParseAs::Property => {

380

                        // No shorthand has a presentation attribute.

381

1396

                        assert!($short_presentation_attr == PresentationAttr::No);

382

383

1396

                        Ok(ParsedProperty::$short_name(parse_input(input)?))

384

1396

385

)+

386

387

                _ => {

388

66199

                    let loc = input.current_source_location();

389

66199

                    Err(loc.new_custom_error(ValueErrorKind::UnknownProperty))

390

66199

391

392

123765

393

};

394

395

396

#[rustfmt::skip]

397

make_properties! {

398

    shorthands: {

399

        // No shorthand has a presentation attribute.

400

        "font"    => (PresentationAttr::No, font   : Font),

401

        "marker"  => (PresentationAttr::No, marker : Marker),

402

403

404

    // longhands that are presentation attributes right now, but need to be turned into properties:

405

    // "d"      - applies only to path

406

407

    longhands: {

408

        // "alignment-baseline"       => (PresentationAttr::Yes, unimplemented),

409

        "baseline-shift"              => (PresentationAttr::Yes, baseline_shift              : BaselineShift),

410

        "clip-path"                   => (PresentationAttr::Yes, clip_path                   : ClipPath),

411

        "clip-rule"                   => (PresentationAttr::Yes, clip_rule                   : ClipRule),

412

        "color"                       => (PresentationAttr::Yes, color                       : Color),

413

        // "color-interpolation"      => (PresentationAttr::Yes, unimplemented),

414

        "color-interpolation-filters" => (PresentationAttr::Yes, color_interpolation_filters : ColorInterpolationFilters),

415

        // "cursor"                   => (PresentationAttr::Yes, unimplemented),

416

        "cx"                          => (PresentationAttr::Yes, cx: CX),

417

        "cy"                          => (PresentationAttr::Yes, cy: CY),

418

        "direction"                   => (PresentationAttr::Yes, direction                   : Direction),

419

        "display"                     => (PresentationAttr::Yes, display                     : Display),

420

        // "dominant-baseline"        => (PresentationAttr::Yes, unimplemented),

421

        "enable-background"           => (PresentationAttr::Yes, enable_background           : EnableBackground),

422

423

        // "applies to any element except animation elements"

424

        // https://www.w3.org/TR/SVG2/styling.html#PresentationAttributes

425

        "fill"                        => (PresentationAttr::Yes, fill                        : Fill),

426

427

        "fill-opacity"                => (PresentationAttr::Yes, fill_opacity                : FillOpacity),

428

        "fill-rule"                   => (PresentationAttr::Yes, fill_rule                   : FillRule),

429

        "filter"                      => (PresentationAttr::Yes, filter                      : Filter),

430

        "flood-color"                 => (PresentationAttr::Yes, flood_color                 : FloodColor),

431

        "flood-opacity"               => (PresentationAttr::Yes, flood_opacity               : FloodOpacity),

432

        "font-family"                 => (PresentationAttr::Yes, font_family                 : FontFamily),

433

        "font-size"                   => (PresentationAttr::Yes, font_size                   : FontSize),

434

        // "font-size-adjust"         => (PresentationAttr::Yes, unimplemented),

435

        "font-stretch"                => (PresentationAttr::Yes, font_stretch                : FontStretch),

436

        "font-style"                  => (PresentationAttr::Yes, font_style                  : FontStyle),

437

        "font-variant"                => (PresentationAttr::Yes, font_variant                : FontVariant),

438

        "font-weight"                 => (PresentationAttr::Yes, font_weight                 : FontWeight),

439

440

        // "glyph-orientation-horizontal" - obsolete, removed from SVG2

441

442

        // "glyph-orientation-vertical" - obsolete, now shorthand -

443

        // https://svgwg.org/svg2-draft/text.html#GlyphOrientationVerticalProperty

444

        // https://www.w3.org/TR/css-writing-modes-3/#propdef-glyph-orientation-vertical

445

//

446

        // Note that even though CSS Writing Modes 3 turned glyph-orientation-vertical

447

        // into a shorthand, SVG1.1 still makes it available as a presentation attribute.

448

        // So, we put the property here, not in the shorthands, and deal with it as a

449

        // special case in the text handling code.

450

        "glyph-orientation-vertical"  => (PresentationAttr::Yes, glyph_orientation_vertical  : GlyphOrientationVertical),

451

        "height" => (PresentationAttr::Yes, height: Height),

452

453

        "image-rendering"             => (PresentationAttr::Yes, image_rendering             : ImageRendering),

454

        "letter-spacing"              => (PresentationAttr::Yes, letter_spacing              : LetterSpacing),

455

        "lighting-color"              => (PresentationAttr::Yes, lighting_color              : LightingColor),

456

        "marker-end"                  => (PresentationAttr::Yes, marker_end                  : MarkerEnd),

457

        "marker-mid"                  => (PresentationAttr::Yes, marker_mid                  : MarkerMid),

458

        "marker-start"                => (PresentationAttr::Yes, marker_start                : MarkerStart),

459

        "mask"                        => (PresentationAttr::Yes, mask                        : Mask),

460

        "opacity"                     => (PresentationAttr::Yes, opacity                     : Opacity),

461

        "overflow"                    => (PresentationAttr::Yes, overflow                    : Overflow),

462

        // "pointer-events"           => (PresentationAttr::Yes, unimplemented),

463

        "r"                           => (PresentationAttr::Yes, r: R),

464

        "rx"                          => (PresentationAttr::Yes, rx: RX),

465

        "ry"                          => (PresentationAttr::Yes, ry: RY),

466

        "shape-rendering"             => (PresentationAttr::Yes, shape_rendering             : ShapeRendering),

467

        "stop-color"                  => (PresentationAttr::Yes, stop_color                  : StopColor),

468

        "stop-opacity"                => (PresentationAttr::Yes, stop_opacity                : StopOpacity),

469

        "stroke"                      => (PresentationAttr::Yes, stroke                      : Stroke),

470

        "stroke-dasharray"            => (PresentationAttr::Yes, stroke_dasharray            : StrokeDasharray),

471

        "stroke-dashoffset"           => (PresentationAttr::Yes, stroke_dashoffset           : StrokeDashoffset),

472

        "stroke-linecap"              => (PresentationAttr::Yes, stroke_line_cap             : StrokeLinecap),

473

        "stroke-linejoin"             => (PresentationAttr::Yes, stroke_line_join            : StrokeLinejoin),

474

        "stroke-miterlimit"           => (PresentationAttr::Yes, stroke_miterlimit           : StrokeMiterlimit),

475

        "stroke-opacity"              => (PresentationAttr::Yes, stroke_opacity              : StrokeOpacity),

476

        "stroke-width"                => (PresentationAttr::Yes, stroke_width                : StrokeWidth),

477

        "text-anchor"                 => (PresentationAttr::Yes, text_anchor                 : TextAnchor),

478

        "text-decoration"             => (PresentationAttr::Yes, text_decoration             : TextDecoration),

479

        // "text-overflow"            => (PresentationAttr::Yes, unimplemented),

480

        "text-rendering"              => (PresentationAttr::Yes, text_rendering              : TextRendering),

481

482

        // "transform" - Special case as presentation attribute:

483

        // The SVG1.1 "transform" attribute has a different grammar than the

484

        // SVG2 "transform" property.  Here we define for the properties machinery,

485

        // and it is handled specially as an attribute in parse_presentation_attributes().

486

        "transform"                   => (PresentationAttr::No, transform_property           : TransformProperty),

487

488

        // "transform-box"            => (PresentationAttr::Yes, unimplemented),

489

        // "transform-origin"         => (PresentationAttr::Yes, unimplemented),

490

        "unicode-bidi"                => (PresentationAttr::Yes, unicode_bidi                : UnicodeBidi),

491

        "visibility"                  => (PresentationAttr::Yes, visibility                  : Visibility),

492

        // "white-space"              => (PresentationAttr::Yes, unimplemented),

493

        // "word-spacing"             => (PresentationAttr::Yes, unimplemented),

494

        "width"                       => (PresentationAttr::Yes, width: Width),

495

        "writing-mode"                => (PresentationAttr::Yes, writing_mode                : WritingMode),

496

        "x"                           => (PresentationAttr::Yes, x: X),

497

        "y"                           => (PresentationAttr::Yes, y: Y),

498

499

500

    longhands_not_supported_by_markup5ever: {

501

        "isolation"                   => (PresentationAttr::No,  isolation                   : Isolation),

502

        "line-height"                 => (PresentationAttr::No,  line_height                 : LineHeight),

503

        "mask-type"                   => (PresentationAttr::Yes, mask_type                   : MaskType),

504

        "mix-blend-mode"              => (PresentationAttr::No,  mix_blend_mode              : MixBlendMode),

505

        "paint-order"                 => (PresentationAttr::Yes, paint_order                 : PaintOrder),

506

        "text-orientation"            => (PresentationAttr::No,  text_orientation            : TextOrientation),

507

        "vector-effect"               => (PresentationAttr::Yes, vector_effect               : VectorEffect),

508

509

510

    // These are not properties, but presentation attributes.  However,

511

    // both xml:lang and xml:space *do* inherit.  We are abusing the

512

    // property inheritance code for these XML-specific attributes.

513

    non_properties: {

514

        xml_lang: XmlLang,

515

        xml_space: XmlSpace,

516

517

518

519

impl SpecifiedValues {

520

96390176

    fn property_index(&self, id: PropertyId) -> Option<usize> {

521

96390176

        let v = self.indices[id.as_usize()];

522

523

96390176

        if v == PropertyId::UnsetProperty.as_u8() {

524

94992419

            None

525

        } else {

526

1397757

            Some(v as usize)

527

528

96390176

529

530

63409

    fn set_property(&mut self, prop: &ParsedProperty, replace: bool) {

531

63409

        let id = prop.get_property_id();

532

63409

        assert!(!id.is_shorthand());

533

534

126203

        if let Some(index) = self.property_index(id) {

535

1205

            if replace {

536

590

                self.props[index] = prop.clone();

537

538

        } else {

539

62794

            self.props.push(prop.clone());

540

62794

            let pos = self.props.len() - 1;

541

62794

            self.indices[id.as_usize()] = pos as u8;

542

543

63409

544

545

96328014

    fn get_property(&self, id: PropertyId) -> ParsedProperty {

546

96328014

        assert!(!id.is_shorthand());

547

548

96328014

        if let Some(index) = self.property_index(id) {

549

1397139

            self.props[index].clone()

550

        } else {

551

94930875

            ParsedProperty::unspecified(id)

552

553

96328014

554

555

60434

    fn set_property_expanding_shorthands(&mut self, prop: &ParsedProperty, replace: bool) {

556

60434

        match *prop {

557

32

            ParsedProperty::Font(SpecifiedValue::Specified(ref f)) => {

558

32

                self.expand_font_shorthand(f, replace)

559

560

1372

            ParsedProperty::Marker(SpecifiedValue::Specified(ref m)) => {

561

1372

                self.expand_marker_shorthand(m, replace)

562

563

            ParsedProperty::Font(SpecifiedValue::Inherit) => {

564

1

                self.expand_font_shorthand_inherit(replace)

565

566

            ParsedProperty::Marker(SpecifiedValue::Inherit) => {

567

1

                self.expand_marker_shorthand_inherit(replace)

568

569

570

59028

            _ => self.set_property(prop, replace),

571

572

60434

573

574

32

    fn expand_font_shorthand(&mut self, font: &Font, replace: bool) {

575

        let FontSpec {

576

32

            style,

577

32

            variant,

578

32

            weight,

579

32

            stretch,

580

32

            size,

581

32

            line_height,

582

32

            family,

583

32

        } = font.to_font_spec();

584

585

32

        self.set_property(

586

32

            &ParsedProperty::FontStyle(SpecifiedValue::Specified(style)),

587

            replace,

588

32

);

589

32

        self.set_property(

590

32

            &ParsedProperty::FontVariant(SpecifiedValue::Specified(variant)),

591

            replace,

592

32

);

593

32

        self.set_property(

594

32

            &ParsedProperty::FontWeight(SpecifiedValue::Specified(weight)),

595

            replace,

596

32

);

597

32

        self.set_property(

598

32

            &ParsedProperty::FontStretch(SpecifiedValue::Specified(stretch)),

599

            replace,

600

32

);

601

32

        self.set_property(

602

32

            &ParsedProperty::FontSize(SpecifiedValue::Specified(size)),

603

            replace,

604

32

);

605

32

        self.set_property(

606

32

            &ParsedProperty::LineHeight(SpecifiedValue::Specified(line_height)),

607

            replace,

608

32

);

609

32

        self.set_property(

610

32

            &ParsedProperty::FontFamily(SpecifiedValue::Specified(family)),

611

            replace,

612

32

);

613

32

614

615

1372

    fn expand_marker_shorthand(&mut self, marker: &Marker, replace: bool) {

616

1372

        let Marker(v) = marker;

617

618

1372

        self.set_property(

619

1372

            &ParsedProperty::MarkerStart(SpecifiedValue::Specified(MarkerStart(v.clone()))),

620

            replace,

621

1372

);

622

1372

        self.set_property(

623

1372

            &ParsedProperty::MarkerMid(SpecifiedValue::Specified(MarkerMid(v.clone()))),

624

            replace,

625

1372

);

626

1372

        self.set_property(

627

1372

            &ParsedProperty::MarkerEnd(SpecifiedValue::Specified(MarkerEnd(v.clone()))),

628

            replace,

629

1372

);

630

1372

631

632

1

    fn expand_font_shorthand_inherit(&mut self, replace: bool) {

633

1

        self.set_property(&ParsedProperty::FontStyle(SpecifiedValue::Inherit), replace);

634

1

        self.set_property(

635

            &ParsedProperty::FontVariant(SpecifiedValue::Inherit),

636

            replace,

637

);

638

1

        self.set_property(

639

            &ParsedProperty::FontWeight(SpecifiedValue::Inherit),

640

            replace,

641

);

642

1

        self.set_property(

643

            &ParsedProperty::FontStretch(SpecifiedValue::Inherit),

644

            replace,

645

);

646

1

        self.set_property(&ParsedProperty::FontSize(SpecifiedValue::Inherit), replace);

647

1

        self.set_property(

648

            &ParsedProperty::LineHeight(SpecifiedValue::Inherit),

649

            replace,

650

);

651

1

        self.set_property(

652

            &ParsedProperty::FontFamily(SpecifiedValue::Inherit),

653

            replace,

654

);

655

1

656

657

1

    fn expand_marker_shorthand_inherit(&mut self, replace: bool) {

658

1

        self.set_property(

659

            &ParsedProperty::MarkerStart(SpecifiedValue::Inherit),

660

            replace,

661

);

662

1

        self.set_property(&ParsedProperty::MarkerMid(SpecifiedValue::Inherit), replace);

663

1

        self.set_property(&ParsedProperty::MarkerEnd(SpecifiedValue::Inherit), replace);

664

1

665

666

57518

    pub fn set_parsed_property(&mut self, prop: &ParsedProperty) {

667

57518

        self.set_property_expanding_shorthands(prop, true);

668

57518

669

670

    /* user agent property have less priority than presentation attributes */

671

2919

    pub fn set_parsed_property_user_agent(&mut self, prop: &ParsedProperty) {

672

2919

        self.set_property_expanding_shorthands(prop, false);

673

2919

674

675

1467053

    pub fn to_computed_values(&self, computed: &mut ComputedValues) {

676

        macro_rules! compute {

677

            ($name:ident, $field:ident) => {{

678

                // This extra block --------^

679

                // is so that prop_val will be dropped within the macro invocation;

680

                // otherwise all the temporary values cause this function to use

681

                // an unreasonably large amount of stack space.

682

                let prop_val = self.get_property(PropertyId::$name);

683

                if let ParsedProperty::$name(s) = prop_val {

684

                    computed.set_value(ComputedValue::$name(

685

                        s.compute(&computed.$field(), computed),

686

));

687

                } else {

688

                    unreachable!();

689

690

}};

691

692

693

        // First, compute font_size.  It needs to be done before everything

694

        // else, so that properties that depend on its computed value

695

        // will be able to use it.  For example, baseline-shift

696

        // depends on font-size.

697

698

1467053

        compute!(FontSize, font_size);

699

700

        // Then, do all the other properties.

701

702

1467039

        compute!(BaselineShift, baseline_shift);

703

1467023

        compute!(ClipPath, clip_path);

704

1467017

        compute!(ClipRule, clip_rule);

705

1467013

        compute!(Color, color);

706

1467011

        compute!(ColorInterpolationFilters, color_interpolation_filters);

707

1467001

        compute!(CX, cx);

708

1467001

        compute!(CY, cy);

709

1467001

        compute!(Direction, direction);

710

1466997

        compute!(Display, display);

711

1466997

        compute!(EnableBackground, enable_background);

712

1466993

        compute!(Fill, fill);

713

1466993

        compute!(FillOpacity, fill_opacity);

714

1466987

        compute!(FillRule, fill_rule);

715

1466977

        compute!(Filter, filter);

716

1466977

        compute!(FloodColor, flood_color);

717

1466975

        compute!(FloodOpacity, flood_opacity);

718

1466975

        compute!(FontFamily, font_family);

719

1466949

        compute!(FontStretch, font_stretch);

720

1466949

        compute!(FontStyle, font_style);

721

1466945

        compute!(FontVariant, font_variant);

722

1466945

        compute!(FontWeight, font_weight);

723

1466941

        compute!(GlyphOrientationVertical, glyph_orientation_vertical);

724

1466941

        compute!(Height, height);

725

1466939

        compute!(ImageRendering, image_rendering);

726

1466939

        compute!(Isolation, isolation);

727

1466939

        compute!(LetterSpacing, letter_spacing);

728

1466933

        compute!(LightingColor, lighting_color);

729

1466933

        compute!(MarkerEnd, marker_end);

730

1466927

        compute!(MarkerMid, marker_mid);

731

1466925

        compute!(MarkerStart, marker_start);

732

1466925

        compute!(Mask, mask);

733

1466925

        compute!(MaskType, mask_type);

734

1466925

        compute!(MixBlendMode, mix_blend_mode);

735

1466923

        compute!(Opacity, opacity);

736

1466921

        compute!(Overflow, overflow);

737

1466921

        compute!(PaintOrder, paint_order);

738

1466921

        compute!(R, r);

739

1466921

        compute!(RX, rx);

740

1466921

        compute!(RY, ry);

741

1466921

        compute!(ShapeRendering, shape_rendering);

742

1466921

        compute!(StopColor, stop_color);

743

1466915

        compute!(StopOpacity, stop_opacity);

744

1466913

        compute!(Stroke, stroke);

745

1466913

        compute!(StrokeDasharray, stroke_dasharray);

746

1466913

        compute!(StrokeDashoffset, stroke_dashoffset);

747

1466897

        compute!(StrokeLinecap, stroke_line_cap);

748

1466893

        compute!(StrokeLinejoin, stroke_line_join);

749

1466881

        compute!(StrokeOpacity, stroke_opacity);

750

1466881

        compute!(StrokeMiterlimit, stroke_miterlimit);

751

1466867

        compute!(StrokeWidth, stroke_width);

752

1466837

        compute!(TextAnchor, text_anchor);

753

1466837

        compute!(TextDecoration, text_decoration);

754

1466837

        compute!(TextOrientation, text_orientation);

755

1466823

        compute!(TextRendering, text_rendering);

756

1466815

        compute!(TransformProperty, transform_property);

757

1466809

        compute!(UnicodeBidi, unicode_bidi);

758

1466799

        compute!(VectorEffect, vector_effect);

759

1466795

        compute!(Visibility, visibility);

760

1466791

        compute!(Width, width);

761

1466791

        compute!(WritingMode, writing_mode);

762

1466775

        compute!(X, x);

763

1466775

        compute!(XmlSpace, xml_space);

764

1466775

        compute!(XmlLang, xml_lang);

765

1466775

        compute!(Y, y);

766

767

2428318

        computed.transform = self.transform.unwrap_or_else(|| {

768

961543

            match self.get_property(PropertyId::TransformProperty) {

769

2

                ParsedProperty::TransformProperty(SpecifiedValue::Specified(ref t)) => {

770

2

                    t.to_transform()

771

772

961541

                _ => Transform::identity(),

773

774

961539

});

775

1466775

776

777

    /// This is a somewhat egregious hack to allow xml:lang to be stored as a presentational

778

    /// attribute. Presentational attributes can often be influenced by stylesheets,

779

    /// so they're cascaded after selector matching is done, but xml:lang can be queried by

780

    /// CSS selectors, so they need to be cascaded *first*.

781

22235

    pub fn inherit_xml_lang(

782

        &self,

783

        computed: &mut ComputedValues,

784

        parent: Option<crate::node::Node>,

785

) {

786

        use crate::node::NodeBorrow;

787

22235

        let prop_val = self.get_property(PropertyId::XmlLang);

788

64516

        if let ParsedProperty::XmlLang(s) = prop_val {

789

64516

            if let Some(parent) = parent {

790

21137

                computed.set_value(ComputedValue::XmlLang(

791

21143

                    parent.borrow_element().get_computed_values().xml_lang(),

792

21137

));

793

21135

794

22233

            computed.set_value(ComputedValue::XmlLang(

795

43373

                s.compute(&computed.xml_lang(), computed),

796

22233

));

797

22230

        } else {

798

            unreachable!();

799

800

22230

801

802

    pub fn is_overflow(&self) -> bool {

803

        if let Some(overflow_index) = self.property_index(PropertyId::Overflow) {

804

            match self.props[overflow_index] {

805

                ParsedProperty::Overflow(SpecifiedValue::Specified(Overflow::Auto)) => true,

806

                ParsedProperty::Overflow(SpecifiedValue::Specified(Overflow::Visible)) => true,

807

                ParsedProperty::Overflow(_) => false,

808

                _ => unreachable!(),

809

810

        } else {

811

            false

812

813

814

815

83680

    fn parse_one_presentation_attribute(&mut self, session: &Session, attr: QualName, value: &str) {

816

83866

        let mut input = ParserInput::new(value);

817

83773

        let mut parser = Parser::new(&mut input);

818

819

83701

        match parse_value(&attr, &mut parser, ParseAs::PresentationAttr) {

820

22798

            Ok(prop) => {

821

22798

                if parser.expect_exhausted().is_ok() {

822

22789

                    self.set_parsed_property(&prop);

823

                } else {

824

1

                    rsvg_log!(

825

                        session,

826

                        "(ignoring invalid presentation attribute {:?}\n    value=\"{}\")\n",

827

                        attr.expanded(),

828

                        value,

829

);

830

831

22788

832

833

            // not a presentation attribute; just ignore it

834

            Err(ParseError {

835

                kind: ParseErrorKind::Custom(ValueErrorKind::UnknownProperty),

836

..

837

            }) => (),

838

839

            // https://www.w3.org/TR/CSS2/syndata.html#unsupported-values

840

            // For all the following cases, ignore illegal values; don't set the whole node to

841

            // be in error in that case.

842

            Err(ParseError {

843

1

                kind: ParseErrorKind::Basic(BasicParseErrorKind::UnexpectedToken(ref t)),

844

..

845

            }) => {

846

1

                let mut tok = String::new();

847

848

1

                t.to_css(&mut tok).unwrap(); // FIXME: what do we do with a fmt::Error?

849

1

                rsvg_log!(

850

                    session,

851

                    "(ignoring invalid presentation attribute {:?}\n    value=\"{}\"\n    \

852

                     unexpected token '{}')",

853

                    attr.expanded(),

854

                    value,

855

                    tok,

856

);

857

1

858

859

            Err(ParseError {

860

                kind: ParseErrorKind::Basic(BasicParseErrorKind::EndOfInput),

861

..

862

            }) => {

863

1

                rsvg_log!(

864

                    session,

865

                    "(ignoring invalid presentation attribute {:?}\n    value=\"{}\"\n    \

866

                     unexpected end of input)",

867

                    attr.expanded(),

868

                    value,

869

);

870

871

872

            Err(ParseError {

873

                kind: ParseErrorKind::Basic(_),

874

..

875

            }) => {

876

                rsvg_log!(

877

                    session,

878

                    "(ignoring invalid presentation attribute {:?}\n    value=\"{}\"\n    \

879

                     unexpected error)",

880

                    attr.expanded(),

881

                    value,

882

);

883

884

885

            Err(ParseError {

886

15

                kind: ParseErrorKind::Custom(ref v),

887

..

888

            }) => {

889

15

                rsvg_log!(

890

                    session,

891

                    "(ignoring invalid presentation attribute {:?}\n    value=\"{}\"\n    {})",

892

                    attr.expanded(),

893

                    value,

894

895

);

896

897

898

83617

899

900

1022281

    pub fn parse_presentation_attributes(&mut self, session: &Session, attrs: &Attributes) {

901

1111470

        for (attr, value) in attrs.iter() {

902

89275

            match attr.expanded() {

903

                expanded_name!("", "transform") => {

904

                    // FIXME: we parse the transform attribute here because we don't yet have

905

                    // a better way to distinguish attributes whose values have different

906

                    // grammars than properties.

907

5513

                    let transform_attr = TransformAttribute::parse_str(value)

908

                        .unwrap_or_else(|_| TransformAttribute::default());

909

5513

                    self.transform = Some(transform_attr.to_transform());

910

5513

911

912

                expanded_name!(xml "lang") => {

913

                    // xml:lang is a non-presentation attribute and as such cannot have the

914

                    // "inherit" value.  So, we don't call parse_one_presentation_attribute()

915

                    // for it, but rather call its parser directly.

916

11

                    let parse_result: Result<XmlLang, _> = attr.parse(value);

917

11

                    match parse_result {

918

11

                        Ok(lang) => {

919

11

                            self.set_parsed_property(&ParsedProperty::XmlLang(

920

11

                                SpecifiedValue::Specified(lang),

921

11

));

922

923

924

                        Err(e) => {

925

                            rsvg_log!(session, "ignoring attribute with invalid value: {}", e);

926

927

928

929

930

                expanded_name!(xml "space") => {

931

                    // xml:space is a non-presentation attribute and as such cannot have the

932

                    // "inherit" value.  So, we don't call parse_one_presentation_attribute()

933

                    // for it, but rather call its parser directly.

934

17

                    let parse_result: Result<XmlSpace, _> = attr.parse(value);

935

17

                    match parse_result {

936

17

                        Ok(space) => {

937

17

                            self.set_parsed_property(&ParsedProperty::XmlSpace(

938

17

                                SpecifiedValue::Specified(space),

939

17

));

940

941

942

                        Err(e) => {

943

                            rsvg_log!(session, "ignoring attribute with invalid value: {}", e);

944

945

946

947

948

83683

                _ => self.parse_one_presentation_attribute(session, attr, value),

949

950

89189

951

1022195

952

953

37632

    pub fn set_property_from_declaration(

954

        &mut self,

955

        declaration: &Declaration,

956

        origin: Origin,

957

        important_styles: &mut HashSet<QualName>,

958

) {

959

37632

        if !declaration.important && important_styles.contains(&declaration.prop_name) {

960

            return;

961

962

963

37620

        if declaration.important {

964

2651

            important_styles.insert(declaration.prop_name.clone());

965

966

967

37620

        if origin == Origin::UserAgent {

968

2920

            self.set_parsed_property_user_agent(&declaration.property);

969

        } else {

970

34700

            self.set_parsed_property(&declaration.property);

971

972

37632

973

974

5218

    pub fn parse_style_declarations(

975

        &mut self,

976

        declarations: &str,

977

        origin: Origin,

978

        important_styles: &mut HashSet<QualName>,

979

        session: &Session,

980

) {

981

5218

        let mut input = ParserInput::new(declarations);

982

5218

        let mut parser = Parser::new(&mut input);

983

984

5218

        RuleBodyParser::new(&mut parser, &mut DeclParser)

985

44681

            .filter_map(|r| match r {

986

34181

                Ok(RuleBodyItem::Decl(decl)) => Some(decl),

987

                Ok(RuleBodyItem::Rule(_)) => None,

988

5283

                Err(e) => {

989

5283

                    rsvg_log!(session, "Invalid declaration; ignoring: {:?}", e);

990

5283

                    None

991

5283

992

39464

})

993

39410

            .for_each(|decl| self.set_property_from_declaration(&decl, origin, important_styles));

994

5216

995

996

997

// Parses the value for the type `T` of the property out of the Parser, including `inherit` values.

998

57569

fn parse_input<'i, T>(input: &mut Parser<'i, '_>) -> Result<SpecifiedValue<T>, ParseError<'i>>

999

where

1000

    T: Property + Clone + Default + Parse,

1001

1002

57569

    if input

1003

57561

        .try_parse(|p| p.expect_ident_matching("inherit"))

1004

57569

        .is_ok()

1005

1006

30

        Ok(SpecifiedValue::Inherit)

1007

    } else {

1008

57539

        Parse::parse(input).map(SpecifiedValue::Specified)

1009

1010

57569

1011

1012

#[cfg(test)]

1013

mod tests {

1014

    use super::*;

1015

    use crate::iri::Iri;

1016

    use crate::length::*;

1017

1018

    #[test]

1019

2

    fn empty_values_computes_to_defaults() {

1020

1

        let specified = SpecifiedValues::default();

1021

1022

1

        let mut computed = ComputedValues::default();

1023

1

        specified.to_computed_values(&mut computed);

1024

1025

1

        assert_eq!(computed.stroke_width(), StrokeWidth::default());

1026

2

1027

1028

    #[test]

1029

2

    fn set_one_property() {

1030

1

        let length = Length::<Both>::new(42.0, LengthUnit::Px);

1031

1032

1

        let mut specified = SpecifiedValues::default();

1033

1

        specified.set_parsed_property(&ParsedProperty::StrokeWidth(SpecifiedValue::Specified(

1034

1

            StrokeWidth(length),

1035

1

        )));

1036

1037

1

        let mut computed = ComputedValues::default();

1038

1

        specified.to_computed_values(&mut computed);

1039

1040

1

        assert_eq!(computed.stroke_width(), StrokeWidth(length));

1041

2

1042

1043

    #[test]

1044

2

    fn replace_existing_property() {

1045

1

        let length1 = Length::<Both>::new(42.0, LengthUnit::Px);

1046

1

        let length2 = Length::<Both>::new(42.0, LengthUnit::Px);

1047

1048

1

        let mut specified = SpecifiedValues::default();

1049

1050

1

        specified.set_parsed_property(&ParsedProperty::StrokeWidth(SpecifiedValue::Specified(

1051

1

            StrokeWidth(length1),

1052

1

        )));

1053

1054

1

        specified.set_parsed_property(&ParsedProperty::StrokeWidth(SpecifiedValue::Specified(

1055

1

            StrokeWidth(length2),

1056

1

        )));

1057

1058

1

        let mut computed = ComputedValues::default();

1059

1

        specified.to_computed_values(&mut computed);

1060

1061

1

        assert_eq!(computed.stroke_width(), StrokeWidth(length2));

1062

2

1063

1064

    #[test]

1065

2

    fn expands_marker_shorthand() {

1066

1

        let mut specified = SpecifiedValues::default();

1067

1

        let iri = Iri::parse_str("url(#foo)").unwrap();

1068

1069

1

        let marker = Marker(iri.clone());

1070

1

        specified.set_parsed_property(&ParsedProperty::Marker(SpecifiedValue::Specified(marker)));

1071

1072

1

        let mut computed = ComputedValues::default();

1073

1

        specified.to_computed_values(&mut computed);

1074

1075

2

        assert_eq!(computed.marker_start(), MarkerStart(iri.clone()));

1076

2

        assert_eq!(computed.marker_mid(), MarkerMid(iri.clone()));

1077

2

        assert_eq!(computed.marker_end(), MarkerEnd(iri.clone()));

1078

2

1079

1080

    #[test]

1081

2

    fn replaces_marker_shorthand() {

1082

1

        let mut specified = SpecifiedValues::default();

1083

1

        let iri1 = Iri::parse_str("url(#foo)").unwrap();

1084

1

        let iri2 = Iri::None;

1085

1086

1

        let marker1 = Marker(iri1.clone());

1087

1

        specified.set_parsed_property(&ParsedProperty::Marker(SpecifiedValue::Specified(marker1)));

1088

1089

1

        let marker2 = Marker(iri2.clone());

1090

1

        specified.set_parsed_property(&ParsedProperty::Marker(SpecifiedValue::Specified(marker2)));

1091

1092

1

        let mut computed = ComputedValues::default();

1093

1

        specified.to_computed_values(&mut computed);

1094

1095

2

        assert_eq!(computed.marker_start(), MarkerStart(iri2.clone()));

1096

2

        assert_eq!(computed.marker_mid(), MarkerMid(iri2.clone()));

1097

2

        assert_eq!(computed.marker_end(), MarkerEnd(iri2.clone()));

1098

2

1099

1100

    #[test]

1101

2

    fn computes_property_that_does_not_inherit_automatically() {

1102

1

        assert!(!<Opacity as Property>::inherits_automatically());

1103

1104

1

        let half_opacity = Opacity::parse_str("0.5").unwrap();

1105

1106

        // first level, as specified with opacity

1107

1108

1

        let mut with_opacity = SpecifiedValues::default();

1109

1

        with_opacity.set_parsed_property(&ParsedProperty::Opacity(SpecifiedValue::Specified(

1110

1

            half_opacity.clone(),

1111

1

        )));

1112

1113

1

        let mut computed_0_5 = ComputedValues::default();

1114

1

        with_opacity.to_computed_values(&mut computed_0_5);

1115

1116

1

        assert_eq!(computed_0_5.opacity(), half_opacity.clone());

1117

1118

        // second level, no opacity specified, and it doesn't inherit

1119

1120

1

        let without_opacity = SpecifiedValues::default();

1121

1122

1

        let mut computed = computed_0_5.clone();

1123

1

        without_opacity.to_computed_values(&mut computed);

1124

1125

1

        assert_eq!(computed.opacity(), Opacity::default());

1126

1127

        // another at second level, opacity set to explicitly inherit

1128

1129

1

        let mut with_inherit_opacity = SpecifiedValues::default();

1130

1

        with_inherit_opacity.set_parsed_property(&ParsedProperty::Opacity(SpecifiedValue::Inherit));

1131

1132

1

        let mut computed = computed_0_5.clone();

1133

1

        with_inherit_opacity.to_computed_values(&mut computed);

1134

1135

1

        assert_eq!(computed.opacity(), half_opacity.clone());

1136

2

1137