azul_css/codegen/
rust.rs

1//! Rust source-code emitter for parsed CSS.
2//!
3//! Produces a `const CSS: Css = ...;` literal plus a minimal `Cargo.toml` and
4//! `src/main.rs` skeleton suitable for `cargo build` against `azul`.
5
6use alloc::{format, string::String, string::ToString, vec, vec::Vec};
7
8use super::{CodegenBackend, GeneratedFile};
9use crate::{
10    css::{
11        AttributeMatchOp, Css, CssAttributeSelector, CssDeclaration, CssNthChildPattern,
12        CssNthChildSelector, CssPath, CssPathPseudoSelector, CssPathSelector, DynamicCssProperty,
13        NodeTypeTag,
14    },
15    props::property::format_static_css_prop,
16};
17
18/// Emits Rust source code for a parsed CSS stylesheet.
19pub struct RustBackend;
20
21impl CodegenBackend for RustBackend {
22    fn lang(&self) -> &'static str {
23        "rust"
24    }
25
26    fn emit_css(&self, css: &Css) -> String {
27        css_to_rust_code(css)
28    }
29
30    fn emit_project(&self, css: &Css) -> Vec<GeneratedFile> {
31        let css_literal = css_to_rust_code(css);
32        let main_rs = format!(
33            "use azul::prelude::*;\r\n\r\n{css_literal}\r\n\r\nfn main() {{\r\n    \
34             println!(\"Generated stylesheet contains {{}} rule(s)\", \
35             CSS.rules.as_ref().len());\r\n}}\r\n",
36        );
37        let cargo_toml = "[package]\r\n\
38            name = \"azul-generated-app\"\r\n\
39            version = \"0.1.0\"\r\n\
40            edition = \"2021\"\r\n\
41            \r\n\
42            [dependencies]\r\n\
43            azul = \"0.0.7\"\r\n"
44            .to_string();
45        vec![
46            GeneratedFile {
47                path: "Cargo.toml".to_string(),
48                contents: cargo_toml,
49            },
50            GeneratedFile {
51                path: "src/main.rs".to_string(),
52                contents: main_rs,
53            },
54        ]
55    }
56}
57
58/// Render a parsed [`Css`] as Rust source code (a `const CSS: Css = ...;`).
59pub fn css_to_rust_code(css: &Css) -> String {
60    let mut output = String::new();
61
62    output.push_str("const CSS: Css = Css {\r\n");
63    output.push_str("\trules: [\r\n");
64
65    for block in css.rules.iter() {
66        output.push_str("\t\tCssRuleBlock {\r\n");
67        output.push_str(&format!(
68            "\t\t\tpath: {},\r\n",
69            print_block_path(&block.path, 3)
70        ));
71        output.push_str(&format!(
72            "\t\t\tpriority: {},\r\n",
73            block.priority,
74        ));
75
76        output.push_str("\t\t\tdeclarations: [\r\n");
77        for declaration in block.declarations.iter() {
78            output.push_str(&format!(
79                "\t\t\t\t{},\r\n",
80                print_declaration(declaration, 4)
81            ));
82        }
83        output.push_str("\t\t\t]\r\n");
84
85        output.push_str("\t\t},\r\n");
86    }
87
88    output.push_str("\t]\r\n");
89    output.push_str("};");
90
91    output.replace("\t", "    ")
92}
93
94pub fn format_node_type(n: &NodeTypeTag) -> &'static str {
95    match n {
96        // Document structure
97        NodeTypeTag::Html => "NodeTypeTag::Html",
98        NodeTypeTag::Head => "NodeTypeTag::Head",
99        NodeTypeTag::Body => "NodeTypeTag::Body",
100
101        // Block elements
102        NodeTypeTag::Div => "NodeTypeTag::Div",
103        NodeTypeTag::P => "NodeTypeTag::P",
104        NodeTypeTag::Article => "NodeTypeTag::Article",
105        NodeTypeTag::Section => "NodeTypeTag::Section",
106        NodeTypeTag::Nav => "NodeTypeTag::Nav",
107        NodeTypeTag::Aside => "NodeTypeTag::Aside",
108        NodeTypeTag::Header => "NodeTypeTag::Header",
109        NodeTypeTag::Footer => "NodeTypeTag::Footer",
110        NodeTypeTag::Main => "NodeTypeTag::Main",
111        NodeTypeTag::Figure => "NodeTypeTag::Figure",
112        NodeTypeTag::FigCaption => "NodeTypeTag::FigCaption",
113
114        // Headings
115        NodeTypeTag::H1 => "NodeTypeTag::H1",
116        NodeTypeTag::H2 => "NodeTypeTag::H2",
117        NodeTypeTag::H3 => "NodeTypeTag::H3",
118        NodeTypeTag::H4 => "NodeTypeTag::H4",
119        NodeTypeTag::H5 => "NodeTypeTag::H5",
120        NodeTypeTag::H6 => "NodeTypeTag::H6",
121
122        // Text formatting
123        NodeTypeTag::Br => "NodeTypeTag::Br",
124        NodeTypeTag::Hr => "NodeTypeTag::Hr",
125        NodeTypeTag::Pre => "NodeTypeTag::Pre",
126        NodeTypeTag::BlockQuote => "NodeTypeTag::BlockQuote",
127        NodeTypeTag::Address => "NodeTypeTag::Address",
128        NodeTypeTag::Details => "NodeTypeTag::Details",
129        NodeTypeTag::Summary => "NodeTypeTag::Summary",
130        NodeTypeTag::Dialog => "NodeTypeTag::Dialog",
131
132        // List elements
133        NodeTypeTag::Ul => "NodeTypeTag::Ul",
134        NodeTypeTag::Ol => "NodeTypeTag::Ol",
135        NodeTypeTag::Li => "NodeTypeTag::Li",
136        NodeTypeTag::Dl => "NodeTypeTag::Dl",
137        NodeTypeTag::Dt => "NodeTypeTag::Dt",
138        NodeTypeTag::Dd => "NodeTypeTag::Dd",
139        NodeTypeTag::Menu => "NodeTypeTag::Menu",
140        NodeTypeTag::MenuItem => "NodeTypeTag::MenuItem",
141        NodeTypeTag::Dir => "NodeTypeTag::Dir",
142
143        // Table elements
144        NodeTypeTag::Table => "NodeTypeTag::Table",
145        NodeTypeTag::Caption => "NodeTypeTag::Caption",
146        NodeTypeTag::THead => "NodeTypeTag::THead",
147        NodeTypeTag::TBody => "NodeTypeTag::TBody",
148        NodeTypeTag::TFoot => "NodeTypeTag::TFoot",
149        NodeTypeTag::Tr => "NodeTypeTag::Tr",
150        NodeTypeTag::Th => "NodeTypeTag::Th",
151        NodeTypeTag::Td => "NodeTypeTag::Td",
152        NodeTypeTag::ColGroup => "NodeTypeTag::ColGroup",
153        NodeTypeTag::Col => "NodeTypeTag::Col",
154
155        // Form elements
156        NodeTypeTag::Form => "NodeTypeTag::Form",
157        NodeTypeTag::FieldSet => "NodeTypeTag::FieldSet",
158        NodeTypeTag::Legend => "NodeTypeTag::Legend",
159        NodeTypeTag::Label => "NodeTypeTag::Label",
160        NodeTypeTag::Input => "NodeTypeTag::Input",
161        NodeTypeTag::Button => "NodeTypeTag::Button",
162        NodeTypeTag::Select => "NodeTypeTag::Select",
163        NodeTypeTag::OptGroup => "NodeTypeTag::OptGroup",
164        NodeTypeTag::SelectOption => "NodeTypeTag::SelectOption",
165        NodeTypeTag::TextArea => "NodeTypeTag::TextArea",
166        NodeTypeTag::Output => "NodeTypeTag::Output",
167        NodeTypeTag::Progress => "NodeTypeTag::Progress",
168        NodeTypeTag::Meter => "NodeTypeTag::Meter",
169        NodeTypeTag::DataList => "NodeTypeTag::DataList",
170
171        // Inline elements
172        NodeTypeTag::Span => "NodeTypeTag::Span",
173        NodeTypeTag::A => "NodeTypeTag::A",
174        NodeTypeTag::Em => "NodeTypeTag::Em",
175        NodeTypeTag::Strong => "NodeTypeTag::Strong",
176        NodeTypeTag::B => "NodeTypeTag::B",
177        NodeTypeTag::I => "NodeTypeTag::I",
178        NodeTypeTag::U => "NodeTypeTag::U",
179        NodeTypeTag::S => "NodeTypeTag::S",
180        NodeTypeTag::Mark => "NodeTypeTag::Mark",
181        NodeTypeTag::Del => "NodeTypeTag::Del",
182        NodeTypeTag::Ins => "NodeTypeTag::Ins",
183        NodeTypeTag::Code => "NodeTypeTag::Code",
184        NodeTypeTag::Samp => "NodeTypeTag::Samp",
185        NodeTypeTag::Kbd => "NodeTypeTag::Kbd",
186        NodeTypeTag::Var => "NodeTypeTag::Var",
187        NodeTypeTag::Cite => "NodeTypeTag::Cite",
188        NodeTypeTag::Dfn => "NodeTypeTag::Dfn",
189        NodeTypeTag::Abbr => "NodeTypeTag::Abbr",
190        NodeTypeTag::Acronym => "NodeTypeTag::Acronym",
191        NodeTypeTag::Q => "NodeTypeTag::Q",
192        NodeTypeTag::Time => "NodeTypeTag::Time",
193        NodeTypeTag::Sub => "NodeTypeTag::Sub",
194        NodeTypeTag::Sup => "NodeTypeTag::Sup",
195        NodeTypeTag::Small => "NodeTypeTag::Small",
196        NodeTypeTag::Big => "NodeTypeTag::Big",
197        NodeTypeTag::Bdo => "NodeTypeTag::Bdo",
198        NodeTypeTag::Bdi => "NodeTypeTag::Bdi",
199        NodeTypeTag::Wbr => "NodeTypeTag::Wbr",
200        NodeTypeTag::Ruby => "NodeTypeTag::Ruby",
201        NodeTypeTag::Rt => "NodeTypeTag::Rt",
202        NodeTypeTag::Rtc => "NodeTypeTag::Rtc",
203        NodeTypeTag::Rp => "NodeTypeTag::Rp",
204        NodeTypeTag::Data => "NodeTypeTag::Data",
205
206        // Embedded content
207        NodeTypeTag::Canvas => "NodeTypeTag::Canvas",
208        NodeTypeTag::Object => "NodeTypeTag::Object",
209        NodeTypeTag::Param => "NodeTypeTag::Param",
210        NodeTypeTag::Embed => "NodeTypeTag::Embed",
211        NodeTypeTag::Audio => "NodeTypeTag::Audio",
212        NodeTypeTag::Video => "NodeTypeTag::Video",
213        NodeTypeTag::Source => "NodeTypeTag::Source",
214        NodeTypeTag::Track => "NodeTypeTag::Track",
215        NodeTypeTag::Map => "NodeTypeTag::Map",
216        NodeTypeTag::Area => "NodeTypeTag::Area",
217        NodeTypeTag::Svg => "NodeTypeTag::Svg",
218        NodeTypeTag::SvgPath => "NodeTypeTag::SvgPath",
219        NodeTypeTag::SvgCircle => "NodeTypeTag::SvgCircle",
220        NodeTypeTag::SvgRect => "NodeTypeTag::SvgRect",
221        NodeTypeTag::SvgEllipse => "NodeTypeTag::SvgEllipse",
222        NodeTypeTag::SvgLine => "NodeTypeTag::SvgLine",
223        NodeTypeTag::SvgPolygon => "NodeTypeTag::SvgPolygon",
224        NodeTypeTag::SvgPolyline => "NodeTypeTag::SvgPolyline",
225        NodeTypeTag::SvgG => "NodeTypeTag::SvgG",
226
227        // SVG container elements
228        NodeTypeTag::SvgDefs => "NodeTypeTag::SvgDefs",
229        NodeTypeTag::SvgSymbol => "NodeTypeTag::SvgSymbol",
230        NodeTypeTag::SvgUse => "NodeTypeTag::SvgUse",
231        NodeTypeTag::SvgSwitch => "NodeTypeTag::SvgSwitch",
232
233        // SVG text elements
234        NodeTypeTag::SvgText => "NodeTypeTag::SvgText",
235        NodeTypeTag::SvgTspan => "NodeTypeTag::SvgTspan",
236        NodeTypeTag::SvgTextPath => "NodeTypeTag::SvgTextPath",
237
238        // SVG paint server elements
239        NodeTypeTag::SvgLinearGradient => "NodeTypeTag::SvgLinearGradient",
240        NodeTypeTag::SvgRadialGradient => "NodeTypeTag::SvgRadialGradient",
241        NodeTypeTag::SvgStop => "NodeTypeTag::SvgStop",
242        NodeTypeTag::SvgPattern => "NodeTypeTag::SvgPattern",
243
244        // SVG clipping/masking elements
245        NodeTypeTag::SvgClipPathElement => "NodeTypeTag::SvgClipPathElement",
246        NodeTypeTag::SvgMask => "NodeTypeTag::SvgMask",
247
248        // SVG filter elements
249        NodeTypeTag::SvgFilter => "NodeTypeTag::SvgFilter",
250        NodeTypeTag::SvgFeBlend => "NodeTypeTag::SvgFeBlend",
251        NodeTypeTag::SvgFeColorMatrix => "NodeTypeTag::SvgFeColorMatrix",
252        NodeTypeTag::SvgFeComponentTransfer => "NodeTypeTag::SvgFeComponentTransfer",
253        NodeTypeTag::SvgFeComposite => "NodeTypeTag::SvgFeComposite",
254        NodeTypeTag::SvgFeConvolveMatrix => "NodeTypeTag::SvgFeConvolveMatrix",
255        NodeTypeTag::SvgFeDiffuseLighting => "NodeTypeTag::SvgFeDiffuseLighting",
256        NodeTypeTag::SvgFeDisplacementMap => "NodeTypeTag::SvgFeDisplacementMap",
257        NodeTypeTag::SvgFeDistantLight => "NodeTypeTag::SvgFeDistantLight",
258        NodeTypeTag::SvgFeDropShadow => "NodeTypeTag::SvgFeDropShadow",
259        NodeTypeTag::SvgFeFlood => "NodeTypeTag::SvgFeFlood",
260        NodeTypeTag::SvgFeFuncR => "NodeTypeTag::SvgFeFuncR",
261        NodeTypeTag::SvgFeFuncG => "NodeTypeTag::SvgFeFuncG",
262        NodeTypeTag::SvgFeFuncB => "NodeTypeTag::SvgFeFuncB",
263        NodeTypeTag::SvgFeFuncA => "NodeTypeTag::SvgFeFuncA",
264        NodeTypeTag::SvgFeGaussianBlur => "NodeTypeTag::SvgFeGaussianBlur",
265        NodeTypeTag::SvgFeImage => "NodeTypeTag::SvgFeImage",
266        NodeTypeTag::SvgFeMerge => "NodeTypeTag::SvgFeMerge",
267        NodeTypeTag::SvgFeMergeNode => "NodeTypeTag::SvgFeMergeNode",
268        NodeTypeTag::SvgFeMorphology => "NodeTypeTag::SvgFeMorphology",
269        NodeTypeTag::SvgFeOffset => "NodeTypeTag::SvgFeOffset",
270        NodeTypeTag::SvgFePointLight => "NodeTypeTag::SvgFePointLight",
271        NodeTypeTag::SvgFeSpecularLighting => "NodeTypeTag::SvgFeSpecularLighting",
272        NodeTypeTag::SvgFeSpotLight => "NodeTypeTag::SvgFeSpotLight",
273        NodeTypeTag::SvgFeTile => "NodeTypeTag::SvgFeTile",
274        NodeTypeTag::SvgFeTurbulence => "NodeTypeTag::SvgFeTurbulence",
275
276        // SVG marker/image elements
277        NodeTypeTag::SvgMarker => "NodeTypeTag::SvgMarker",
278        NodeTypeTag::SvgImage => "NodeTypeTag::SvgImage",
279        NodeTypeTag::SvgForeignObject => "NodeTypeTag::SvgForeignObject",
280
281        // SVG descriptive elements
282        NodeTypeTag::SvgTitle => "NodeTypeTag::SvgTitle",
283        NodeTypeTag::SvgDesc => "NodeTypeTag::SvgDesc",
284        NodeTypeTag::SvgMetadata => "NodeTypeTag::SvgMetadata",
285        NodeTypeTag::SvgA => "NodeTypeTag::SvgA",
286        NodeTypeTag::SvgView => "NodeTypeTag::SvgView",
287        NodeTypeTag::SvgStyle => "NodeTypeTag::SvgStyle",
288        NodeTypeTag::SvgScript => "NodeTypeTag::SvgScript",
289
290        // SVG animation elements
291        NodeTypeTag::SvgAnimate => "NodeTypeTag::SvgAnimate",
292        NodeTypeTag::SvgAnimateMotion => "NodeTypeTag::SvgAnimateMotion",
293        NodeTypeTag::SvgAnimateTransform => "NodeTypeTag::SvgAnimateTransform",
294        NodeTypeTag::SvgSet => "NodeTypeTag::SvgSet",
295        NodeTypeTag::SvgMpath => "NodeTypeTag::SvgMpath",
296
297        // Metadata
298        NodeTypeTag::Title => "NodeTypeTag::Title",
299        NodeTypeTag::Meta => "NodeTypeTag::Meta",
300        NodeTypeTag::Link => "NodeTypeTag::Link",
301        NodeTypeTag::Script => "NodeTypeTag::Script",
302        NodeTypeTag::Style => "NodeTypeTag::Style",
303        NodeTypeTag::Base => "NodeTypeTag::Base",
304
305        // Content elements
306        NodeTypeTag::Text => "NodeTypeTag::Text",
307        NodeTypeTag::Img => "NodeTypeTag::Img",
308        NodeTypeTag::VirtualView => "NodeTypeTag::VirtualView",
309        NodeTypeTag::Icon => "NodeTypeTag::Icon",
310        NodeTypeTag::GeolocationProbe => "NodeTypeTag::GeolocationProbe",
311
312        // Pseudo-elements
313        NodeTypeTag::Before => "NodeTypeTag::Before",
314        NodeTypeTag::After => "NodeTypeTag::After",
315        NodeTypeTag::Marker => "NodeTypeTag::Marker",
316        NodeTypeTag::Placeholder => "NodeTypeTag::Placeholder",
317    }
318}
319
320pub fn print_block_path(path: &CssPath, tabs: usize) -> String {
321    let t = String::from("    ").repeat(tabs);
322    let t1 = String::from("    ").repeat(tabs + 1);
323
324    format!(
325        "CssPath {{\r\n{}selectors: {}\r\n{}}}",
326        t1,
327        format_selectors(path.selectors.as_ref(), tabs + 1),
328        t
329    )
330}
331
332pub fn format_selectors(selectors: &[CssPathSelector], tabs: usize) -> String {
333    let t = String::from("    ").repeat(tabs);
334    let t1 = String::from("    ").repeat(tabs + 1);
335
336    let selectors_formatted = selectors
337        .iter()
338        .map(|s| format!("{}{},", t1, format_single_selector(s, tabs + 1)))
339        .collect::<Vec<String>>()
340        .join("\r\n");
341
342    format!("vec![\r\n{}\r\n{}].into()", selectors_formatted, t)
343}
344
345pub fn format_single_selector(p: &CssPathSelector, _tabs: usize) -> String {
346    match p {
347        CssPathSelector::Global => "CssPathSelector::Global".to_string(),
348        CssPathSelector::Type(ntp) => format!("CssPathSelector::Type({})", format_node_type(ntp)),
349        CssPathSelector::Class(class) => {
350            format!("CssPathSelector::Class(String::from({:?}))", class)
351        }
352        CssPathSelector::Id(id) => format!("CssPathSelector::Id(String::from({:?}))", id),
353        CssPathSelector::PseudoSelector(cps) => format!(
354            "CssPathSelector::PseudoSelector({})",
355            format_pseudo_selector_type(cps)
356        ),
357        CssPathSelector::Attribute(a) => format!(
358            "CssPathSelector::Attribute({})",
359            format_attribute_selector(a)
360        ),
361        CssPathSelector::DirectChildren => "CssPathSelector::DirectChildren".to_string(),
362        CssPathSelector::Children => "CssPathSelector::Children".to_string(),
363        CssPathSelector::AdjacentSibling => "CssPathSelector::AdjacentSibling".to_string(),
364        CssPathSelector::GeneralSibling => "CssPathSelector::GeneralSibling".to_string(),
365    }
366}
367
368pub fn format_pseudo_selector_type(p: &CssPathPseudoSelector) -> String {
369    match p {
370        CssPathPseudoSelector::First => "CssPathPseudoSelector::First".to_string(),
371        CssPathPseudoSelector::Last => "CssPathPseudoSelector::Last".to_string(),
372        CssPathPseudoSelector::NthChild(n) => format!(
373            "CssPathPseudoSelector::NthChild({})",
374            format_nth_child_selector(n)
375        ),
376        CssPathPseudoSelector::Hover => "CssPathPseudoSelector::Hover".to_string(),
377        CssPathPseudoSelector::Active => "CssPathPseudoSelector::Active".to_string(),
378        CssPathPseudoSelector::Focus => "CssPathPseudoSelector::Focus".to_string(),
379        CssPathPseudoSelector::Backdrop => "CssPathPseudoSelector::Backdrop".to_string(),
380        CssPathPseudoSelector::Lang(lang) => format!(
381            "CssPathPseudoSelector::Lang(AzString::from_const_str(\"{}\"))",
382            lang.as_str()
383        ),
384        CssPathPseudoSelector::Dragging => "CssPathPseudoSelector::Dragging".to_string(),
385        CssPathPseudoSelector::DragOver => "CssPathPseudoSelector::DragOver".to_string(),
386    }
387}
388
389pub fn format_attribute_selector(a: &CssAttributeSelector) -> String {
390    let value = match a.value.as_ref() {
391        Some(v) => format!(
392            "OptionString::Some(AzString::from_const_str({:?}))",
393            v.as_str()
394        ),
395        None => "OptionString::None".to_string(),
396    };
397    format!(
398        "CssAttributeSelector {{ name: AzString::from_const_str({:?}), op: {}, value: {} }}",
399        a.name.as_str(),
400        format_attribute_match_op(&a.op),
401        value
402    )
403}
404
405pub fn format_attribute_match_op(op: &AttributeMatchOp) -> String {
406    match op {
407        AttributeMatchOp::Exists => "AttributeMatchOp::Exists".to_string(),
408        AttributeMatchOp::Eq => "AttributeMatchOp::Eq".to_string(),
409        AttributeMatchOp::Includes => "AttributeMatchOp::Includes".to_string(),
410        AttributeMatchOp::DashMatch => "AttributeMatchOp::DashMatch".to_string(),
411        AttributeMatchOp::Prefix => "AttributeMatchOp::Prefix".to_string(),
412        AttributeMatchOp::Suffix => "AttributeMatchOp::Suffix".to_string(),
413        AttributeMatchOp::Substring => "AttributeMatchOp::Substring".to_string(),
414    }
415}
416
417pub fn format_nth_child_selector(n: &CssNthChildSelector) -> String {
418    match n {
419        CssNthChildSelector::Number(num) => format!("CssNthChildSelector::Number({})", num),
420        CssNthChildSelector::Even => "CssNthChildSelector::Even".to_string(),
421        CssNthChildSelector::Odd => "CssNthChildSelector::Odd".to_string(),
422        CssNthChildSelector::Pattern(CssNthChildPattern {
423            pattern_repeat,
424            offset,
425        }) => format!(
426            "CssNthChildSelector::Pattern(CssNthChildPattern {{ pattern_repeat: {}, offset: {} }})",
427            pattern_repeat, offset
428        ),
429    }
430}
431
432pub fn print_declaration(decl: &CssDeclaration, tabs: usize) -> String {
433    match decl {
434        CssDeclaration::Static(s) => format!(
435            "CssDeclaration::Static({})",
436            format_static_css_prop(s, tabs)
437        ),
438        CssDeclaration::Dynamic(d) => format!(
439            "CssDeclaration::Dynamic({})",
440            format_dynamic_css_prop(d, tabs)
441        ),
442    }
443}
444
445pub fn format_dynamic_css_prop(decl: &DynamicCssProperty, tabs: usize) -> String {
446    let t = String::from("    ").repeat(tabs);
447    format!(
448        "DynamicCssProperty {{\r\n{}    dynamic_id: {:?},\r\n{}    default_value: {},\r\n{}}}",
449        t,
450        decl.dynamic_id,
451        t,
452        format_static_css_prop(&decl.default_value, tabs + 1),
453        t
454    )
455}
456
457#[cfg(test)]
458mod tests {
459    use alloc::vec;
460
461    use super::*;
462    use crate::css::CssRuleBlock;
463
464    fn sample_css() -> Css {
465        let path = CssPath::new(vec![CssPathSelector::Type(NodeTypeTag::Div)]);
466        let block = CssRuleBlock::new(path, vec![]);
467        Css {
468            rules: vec![block].into(),
469        }
470    }
471
472    #[test]
473    fn rust_backend_emits_const_literal() {
474        let css = sample_css();
475        let rust = RustBackend.emit_css(&css);
476        assert!(rust.contains("const CSS: Css"));
477        assert!(rust.contains("NodeTypeTag::Div"));
478    }
479
480    #[test]
481    fn rust_backend_emits_project_files() {
482        let css = sample_css();
483        let files = RustBackend.emit_project(&css);
484        let paths: alloc::vec::Vec<_> = files.iter().map(|f| f.path.as_str()).collect();
485        assert!(paths.contains(&"Cargo.toml"));
486        assert!(paths.contains(&"src/main.rs"));
487        let main_rs = files
488            .iter()
489            .find(|f| f.path == "src/main.rs")
490            .expect("main.rs missing");
491        assert!(main_rs.contains_const_literal());
492    }
493
494    impl GeneratedFile {
495        fn contains_const_literal(&self) -> bool {
496            self.contents.contains("const CSS: Css")
497        }
498    }
499}
azul_css/codegen/rust.rs

azul_css/codegen/
rust.rs
