feat: 将样式转为对象插入到代码中

NervJS · Oct 16, 2023 · 644a0d3 · 644a0d3
1 parent ae91b2c
commit 644a0d3
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Showing 4 changed files with 109 additions and 11 deletions.
diff --git a/src/lib.rs b/src/lib.rs
@@ -29,12 +29,11 @@ pub fn parse(component: String, styles: Vec<String>) -> String {
   let css = styles.join("\n");
   let mut style_parser = StyleParser::new(&document);
   style_parser.parse(&css);
-  let style_record = style_parser.calc();
+  let style_data = style_parser.calc();
 
   let program = Rc::new(RefCell::new(document.program.as_ref().unwrap().clone()));
   let jsx_record = Rc::new(RefCell::new(document.jsx_record.as_ref().unwrap().clone()));
-  let style_record = Rc::new(RefCell::new(style_record));
-  let mut style_write = StyleWrite::new(program.clone(), jsx_record.clone(), style_record.clone());
+  let mut style_write = StyleWrite::new(program.clone(), jsx_record.clone(), style_data.style_record.clone(), style_data.all_style.clone());
   style_write.write();
 
   // ast 转代码

diff --git a/src/style_parser.rs b/src/style_parser.rs
@@ -1,4 +1,4 @@
-use std::{cell::RefCell, collections::HashMap, convert::Infallible, rc::Rc};
+use std::{cell::RefCell, collections::HashMap, convert::Infallible, rc::Rc, hash::Hash};
 
 use lightningcss::{
   declaration::DeclarationBlock,
@@ -11,6 +11,11 @@ use lightningcss::{
 
 use crate::{document::JSXDocument, visitor::SpanKey};
 
+pub struct StyleData<'i> {
+  pub style_record: Rc<RefCell<HashMap<SpanKey, StyleDeclaration<'i>>>>,
+  pub all_style: Rc<RefCell<HashMap<String, StyleDeclaration<'i>>>>,
+}
+
 #[derive(Debug, Clone)]
 pub struct StyleDeclaration<'i> {
   pub specificity: u32,
@@ -19,16 +24,19 @@ pub struct StyleDeclaration<'i> {
 
 pub struct StyleVisitor<'i> {
   pub style_record: Rc<RefCell<HashMap<SpanKey, Vec<StyleDeclaration<'i>>>>>,
+  pub all_style: Rc<RefCell<HashMap<String, Vec<StyleDeclaration<'i>>>>>,
   pub document: &'i JSXDocument,
 }
 
 impl<'i> StyleVisitor<'i> {
   pub fn new(
     document: &'i JSXDocument,
     style_record: Rc<RefCell<HashMap<SpanKey, Vec<StyleDeclaration<'i>>>>>,
+    all_style: Rc<RefCell<HashMap<String, Vec<StyleDeclaration<'i>>>>>,
   ) -> Self {
     StyleVisitor {
       style_record,
+      all_style,
       document,
     }
   }
@@ -44,6 +52,15 @@ impl<'i> Visitor<'i> for StyleVisitor<'i> {
         let selectors = selectors_str.split(",").collect::<Vec<&str>>();
         for index in 0..selectors.len() {
           let selector = selectors[index].trim().replace(".", "");
+          {
+            let mut all_style = self.all_style.borrow_mut();
+            let declarations: &mut Vec<StyleDeclaration<'_>> =
+              all_style.entry(selector.clone()).or_insert(vec![]);
+            declarations.push(StyleDeclaration {
+              specificity: style.selectors.0.get(index).unwrap().specificity(),
+              declaration: style.declarations.clone(),
+            });
+          }
           let elements = self.document.select(selector.as_str());
           for element in elements {
             let mut style_record = self.style_record.borrow_mut();
@@ -64,26 +81,26 @@ impl<'i> Visitor<'i> for StyleVisitor<'i> {
 
 pub struct StyleParser<'i> {
   pub style_record: Rc<RefCell<HashMap<SpanKey, Vec<StyleDeclaration<'i>>>>>,
+  pub all_style: Rc<RefCell<HashMap<String, Vec<StyleDeclaration<'i>>>>>,
   pub document: &'i JSXDocument,
 }
 
 impl<'i> StyleParser<'i> {
   pub fn new(document: &'i JSXDocument) -> Self {
     StyleParser {
       style_record: Rc::new(RefCell::new(HashMap::new())),
+      all_style: Rc::new(RefCell::new(HashMap::new())),
       document,
     }
   }
 
   pub fn parse(&mut self, css: &'i str) {
     let mut stylesheet = StyleSheet::parse(css, ParserOptions::default()).expect("解析样式失败");
-    let mut style_visitor = StyleVisitor::new(self.document, Rc::clone(&self.style_record));
+    let mut style_visitor = StyleVisitor::new(self.document, Rc::clone(&self.style_record), Rc::clone(&self.all_style));
     stylesheet.visit(&mut style_visitor).unwrap();
   }
 
-  pub fn calc(&self) -> HashMap<SpanKey, StyleDeclaration<'i>> {
-    // 遍历 style_record，计算每个节点的最终样式
-    let mut style_record = self.style_record.borrow_mut();
+  fn calc_style_record<T: Hash + Eq + Clone>(&self, style_record: &mut HashMap<T, Vec<StyleDeclaration<'i>>>) -> HashMap<T, StyleDeclaration<'i>> {
     let mut final_style_record = HashMap::new();
     for (id, declarations) in style_record.iter_mut() {
       declarations.sort_by(|a, b| a.specificity.cmp(&b.specificity));
@@ -117,7 +134,7 @@ impl<'i> StyleParser<'i> {
         }
       }
       final_style_record.insert(
-        *id,
+        (*id).clone(),
         StyleDeclaration {
           specificity: 0,
           declaration: DeclarationBlock {
@@ -129,4 +146,16 @@ impl<'i> StyleParser<'i> {
     }
     final_style_record
   }
+
+  pub fn calc(&self) -> StyleData<'i> {
+    // 遍历 style_record，计算每个节点的最终样式
+    let mut style_record = self.style_record.borrow_mut();
+    let mut all_style = self.all_style.borrow_mut();
+    let final_style_record = self.calc_style_record(&mut style_record);
+    let final_all_style = self.calc_style_record(&mut all_style);
+    StyleData {
+      style_record: Rc::new(RefCell::new(final_style_record)),
+      all_style: Rc::new(RefCell::new(final_all_style)),
+    }
+  }
 }
diff --git a/src/style_write.rs b/src/style_write.rs
@@ -12,23 +12,26 @@ pub struct StyleWrite<'i> {
   pub module: Rc<RefCell<Program>>,
   pub jsx_record: Rc<RefCell<JSXRecord>>,
   pub style_record: Rc<RefCell<HashMap<SpanKey, StyleDeclaration<'i>>>>,
+  pub all_style: Rc<RefCell<HashMap<String, StyleDeclaration<'i>>>>,
 }
 
 impl<'i> StyleWrite<'i> {
   pub fn new(
     module: Rc<RefCell<Program>>,
     jsx_record: Rc<RefCell<JSXRecord>>,
     style_record: Rc<RefCell<HashMap<SpanKey, StyleDeclaration<'i>>>>,
+    all_style: Rc<RefCell<HashMap<String, StyleDeclaration<'i>>>>,
   ) -> Self {
     StyleWrite {
       module,
       jsx_record,
       style_record,
+      all_style,
     }
   }
 
   pub fn write(&mut self) {
-    let mut style_visitor = AstMutVisitor::new(self.jsx_record.clone(), self.style_record.clone());
+    let mut style_visitor = AstMutVisitor::new(self.jsx_record.clone(), self.style_record.clone(), self.all_style.clone());
     self.module.borrow_mut().visit_mut_with(&mut style_visitor);
   }
 }
diff --git a/src/visitor.rs b/src/visitor.rs
@@ -12,7 +12,7 @@ use swc_ecma_ast::{
   Expr,
    Ident, JSXAttr, JSXAttrName, JSXAttrOrSpread, JSXAttrValue, JSXElement,
    JSXElementName, JSXExpr, KeyValueProp, Lit, Prop, PropName,
-  PropOrSpread, Str, JSXFragment, ImportDecl, ImportSpecifier, CallExpr, Callee, Null, ExprOrSpread, JSXExprContainer,
+  PropOrSpread, Str, JSXFragment, ImportDecl, ImportSpecifier, CallExpr, Callee, Null, ExprOrSpread, JSXExprContainer, Module, Stmt, ObjectLit, ExprStmt, AssignExpr, PatOrExpr,Pat, BindingIdent, ModuleItem, ModuleDecl, Decl, VarDecl, VarDeclKind, VarDeclarator
 };
 use swc_ecma_visit::{
   noop_visit_mut_type, noop_visit_type, VisitMut, VisitMutWith, VisitAll, Visit, VisitAllWith,
@@ -175,23 +175,90 @@ impl<'a> VisitAll for AstVisitor<'a> {
 pub struct AstMutVisitor<'a> {
   pub jsx_record: Rc<RefCell<JSXRecord>>,
   pub style_record: Rc<RefCell<HashMap<SpanKey, StyleDeclaration<'a>>>>,
+  pub all_style: Rc<RefCell<HashMap<String, StyleDeclaration<'a>>>>,
 }
 
 impl<'a> AstMutVisitor<'a> {
   pub fn new(
     jsx_record: Rc<RefCell<JSXRecord>>,
     style_record: Rc<RefCell<HashMap<SpanKey, StyleDeclaration<'a>>>>,
+    all_style: Rc<RefCell<HashMap<String, StyleDeclaration<'a>>>>,
   ) -> Self {
     AstMutVisitor {
       jsx_record,
       style_record,
+      all_style,
     }
   }
 }
 
 impl<'a> VisitMut for AstMutVisitor<'a> {
   noop_visit_mut_type!();
 
+  fn visit_mut_module(&mut self, module: &mut Module) {
+    let inner_style_stmt = Stmt::Decl(Decl::Var(Box::new(VarDecl {
+      span: DUMMY_SP,
+      kind: VarDeclKind::Var,
+      declare: false,
+      decls: vec![VarDeclarator {
+        span: DUMMY_SP,
+        name: Pat::Ident(BindingIdent {
+          id: Ident::new("__inner_style__".into(), DUMMY_SP),
+          type_ann: None,
+        }),
+        definite: false,
+        init: Some(Box::new(Expr::Object(ObjectLit {
+          span: DUMMY_SP,
+          props: self
+            .all_style
+            .borrow()
+            .iter()
+            .map(|(key, value)| {
+              PropOrSpread::Prop(Box::new(Prop::KeyValue(KeyValueProp {
+                key: PropName::Ident(Ident::new(key.clone().into(), DUMMY_SP)),
+                value: Box::new(Expr::Object(ObjectLit {
+                  span: DUMMY_SP,
+                  props: value
+                    .declaration
+                    .declarations
+                    .iter()
+                    .map(|declaration| {
+                      PropOrSpread::Prop(Box::new(Prop::KeyValue(KeyValueProp {
+                        key: PropName::Ident(Ident::new(
+                          declaration
+                            .property_id()
+                            .to_css_string(PrinterOptions::default())
+                            .unwrap()
+                            .into(),
+                          DUMMY_SP,
+                        )),
+                        value: declaration
+                          .value_to_css_string(PrinterOptions::default())
+                          .unwrap()
+                          .into(),
+                      })))
+                    })
+                    .collect::<Vec<PropOrSpread>>()
+                    .into(),
+                })),
+              })))
+            })
+            .collect::<Vec<PropOrSpread>>()
+            .into(),
+        })))
+      }]
+    })));
+
+    // 将 inner_style_stmt 插入到 module 的最后一条 import 语句之后
+    let mut last_import_index: i32 = -1;
+    for (index, stmt) in module.body.iter().enumerate() {
+      if let ModuleItem::ModuleDecl(ModuleDecl::Import(_)) = stmt {
+        last_import_index = index as i32;
+      }
+    }
+    module.body.insert((last_import_index + 1) as usize, ModuleItem::Stmt(inner_style_stmt));
+  }
+
   fn visit_mut_jsx_element(&mut self, n: &mut JSXElement) {
     let span_key = SpanKey(n.span);
     if let Some(element) = self.jsx_record.borrow().get(&span_key) {