postcss,(plugins): nanocss, postcss-preset-env

1 files changed, 386 insertions, 0 deletions

diff --git a/node_modules/svgo/plugins/inlineStyles.js b/node_modules/svgo/plugins/inlineStyles.js
new file mode 100644
index 00000000..e931b5f6
--- /dev/null
+++ b/node_modules/svgo/plugins/inlineStyles.js
@@ -0,0 +1,386 @@
+'use strict';
+
+/**
+ * @typedef {import('../lib/types').Specificity} Specificity
+ * @typedef {import('../lib/types').XastElement} XastElement
+ * @typedef {import('../lib/types').XastParent} XastParent
+ */
+
+const csstree = require('css-tree');
+const {
+  // @ts-ignore not defined in @types/csso
+  syntax: { specificity },
+} = require('csso');
+const {
+  visitSkip,
+  querySelectorAll,
+  detachNodeFromParent,
+} = require('../lib/xast.js');
+
+exports.name = 'inlineStyles';
+exports.description = 'inline styles (additional options)';
+
+/**
+ * Compares two selector specificities.
+ * extracted from https://github.com/keeganstreet/specificity/blob/main/specificity.js#L211
+ *
+ * @type {(a: Specificity, b: Specificity) => number}
+ */
+const compareSpecificity = (a, b) => {
+  for (var i = 0; i < 4; i += 1) {
+    if (a[i] < b[i]) {
+      return -1;
+    } else if (a[i] > b[i]) {
+      return 1;
+    }
+  }
+  return 0;
+};
+
+/**
+ * @type {(value: any) => any}
+ */
+const toAny = (value) => value;
+
+/**
+ * Moves + merges styles from style elements to element styles
+ *
+ * Options
+ *   onlyMatchedOnce (default: true)
+ *     inline only selectors that match once
+ *
+ *   removeMatchedSelectors (default: true)
+ *     clean up matched selectors,
+ *     leave selectors that hadn't matched
+ *
+ *   useMqs (default: ['', 'screen'])
+ *     what media queries to be used
+ *     empty string element for styles outside media queries
+ *
+ *   usePseudos (default: [''])
+ *     what pseudo-classes/-elements to be used
+ *     empty string element for all non-pseudo-classes and/or -elements
+ *
+ * @author strarsis <strarsis@gmail.com>
+ *
+ * @type {import('./plugins-types').Plugin<'inlineStyles'>}
+ */
+exports.fn = (root, params) => {
+  const {
+    onlyMatchedOnce = true,
+    removeMatchedSelectors = true,
+    useMqs = ['', 'screen'],
+    usePseudos = [''],
+  } = params;
+
+  /**
+   * @type {Array<{ node: XastElement, parentNode: XastParent, cssAst: csstree.StyleSheet }>}
+   */
+  const styles = [];
+  /**
+   * @type {Array<{
+   *   node: csstree.Selector,
+   *   item: csstree.ListItem<csstree.CssNode>,
+   *   rule: csstree.Rule,
+   *   matchedElements?: Array<XastElement>
+   * }>}
+   */
+  let selectors = [];
+
+  return {
+    element: {
+      enter: (node, parentNode) => {
+        // skip <foreignObject /> content
+        if (node.name === 'foreignObject') {
+          return visitSkip;
+        }
+        // collect only non-empty <style /> elements
+        if (node.name !== 'style' || node.children.length === 0) {
+          return;
+        }
+        // values other than the empty string or text/css are not used
+        if (
+          node.attributes.type != null &&
+          node.attributes.type !== '' &&
+          node.attributes.type !== 'text/css'
+        ) {
+          return;
+        }
+        // parse css in style element
+        let cssText = '';
+        for (const child of node.children) {
+          if (child.type === 'text' || child.type === 'cdata') {
+            cssText += child.value;
+          }
+        }
+        /**
+         * @type {null | csstree.CssNode}
+         */
+        let cssAst = null;
+        try {
+          cssAst = csstree.parse(cssText, {
+            parseValue: false,
+            parseCustomProperty: false,
+          });
+        } catch {
+          return;
+        }
+        if (cssAst.type === 'StyleSheet') {
+          styles.push({ node, parentNode, cssAst });
+        }
+
+        // collect selectors
+        csstree.walk(cssAst, {
+          visit: 'Selector',
+          enter(node, item) {
+            const atrule = this.atrule;
+            const rule = this.rule;
+            if (rule == null) {
+              return;
+            }
+
+            // skip media queries not included into useMqs param
+            let mq = '';
+            if (atrule != null) {
+              mq = atrule.name;
+              if (atrule.prelude != null) {
+                mq += ` ${csstree.generate(atrule.prelude)}`;
+              }
+            }
+            if (useMqs.includes(mq) === false) {
+              return;
+            }
+
+            /**
+             * @type {Array<{
+             *   item: csstree.ListItem<csstree.CssNode>,
+             *   list: csstree.List<csstree.CssNode>
+             * }>}
+             */
+            const pseudos = [];
+            if (node.type === 'Selector') {
+              node.children.forEach((childNode, childItem, childList) => {
+                if (
+                  childNode.type === 'PseudoClassSelector' ||
+                  childNode.type === 'PseudoElementSelector'
+                ) {
+                  pseudos.push({ item: childItem, list: childList });
+                }
+              });
+            }
+
+            // skip pseudo classes and pseudo elements not includes into usePseudos param
+            const pseudoSelectors = csstree.generate({
+              type: 'Selector',
+              children: new csstree.List().fromArray(
+                pseudos.map((pseudo) => pseudo.item.data)
+              ),
+            });
+            if (usePseudos.includes(pseudoSelectors) === false) {
+              return;
+            }
+
+            // remove pseudo classes and elements to allow querySelector match elements
+            // TODO this is not very accurate since some pseudo classes like first-child
+            // are used for selection
+            for (const pseudo of pseudos) {
+              pseudo.list.remove(pseudo.item);
+            }
+
+            selectors.push({ node, item, rule });
+          },
+        });
+      },
+    },
+
+    root: {
+      exit: () => {
+        if (styles.length === 0) {
+          return;
+        }
+        // stable sort selectors
+        const sortedSelectors = [...selectors]
+          .sort((a, b) => {
+            const aSpecificity = specificity(a.item.data);
+            const bSpecificity = specificity(b.item.data);
+            return compareSpecificity(aSpecificity, bSpecificity);
+          })
+          .reverse();
+
+        for (const selector of sortedSelectors) {
+          // match selectors
+          const selectorText = csstree.generate(selector.item.data);
+          /**
+           * @type {Array<XastElement>}
+           */
+          const matchedElements = [];
+          try {
+            for (const node of querySelectorAll(root, selectorText)) {
+              if (node.type === 'element') {
+                matchedElements.push(node);
+              }
+            }
+          } catch (selectError) {
+            continue;
+          }
+          // nothing selected
+          if (matchedElements.length === 0) {
+            continue;
+          }
+
+          // apply styles to matched elements
+          // skip selectors that match more than once if option onlyMatchedOnce is enabled
+          if (onlyMatchedOnce && matchedElements.length > 1) {
+            continue;
+          }
+
+          // apply <style/> to matched elements
+          for (const selectedEl of matchedElements) {
+            const styleDeclarationList = csstree.parse(
+              selectedEl.attributes.style == null
+                ? ''
+                : selectedEl.attributes.style,
+              {
+                context: 'declarationList',
+                parseValue: false,
+              }
+            );
+            if (styleDeclarationList.type !== 'DeclarationList') {
+              continue;
+            }
+            const styleDeclarationItems = new Map();
+            csstree.walk(styleDeclarationList, {
+              visit: 'Declaration',
+              enter(node, item) {
+                styleDeclarationItems.set(node.property, item);
+              },
+            });
+            // merge declarations
+            csstree.walk(selector.rule, {
+              visit: 'Declaration',
+              enter(ruleDeclaration) {
+                // existing inline styles have higher priority
+                // no inline styles, external styles,                                    external styles used
+                // inline styles,    external styles same   priority as inline styles,   inline   styles used
+                // inline styles,    external styles higher priority than inline styles, external styles used
+                const matchedItem = styleDeclarationItems.get(
+                  ruleDeclaration.property
+                );
+                const ruleDeclarationItem =
+                  styleDeclarationList.children.createItem(ruleDeclaration);
+                if (matchedItem == null) {
+                  styleDeclarationList.children.append(ruleDeclarationItem);
+                } else if (
+                  matchedItem.data.important !== true &&
+                  ruleDeclaration.important === true
+                ) {
+                  styleDeclarationList.children.replace(
+                    matchedItem,
+                    ruleDeclarationItem
+                  );
+                  styleDeclarationItems.set(
+                    ruleDeclaration.property,
+                    ruleDeclarationItem
+                  );
+                }
+              },
+            });
+            selectedEl.attributes.style =
+              csstree.generate(styleDeclarationList);
+          }
+
+          if (
+            removeMatchedSelectors &&
+            matchedElements.length !== 0 &&
+            selector.rule.prelude.type === 'SelectorList'
+          ) {
+            // clean up matching simple selectors if option removeMatchedSelectors is enabled
+            selector.rule.prelude.children.remove(selector.item);
+          }
+          selector.matchedElements = matchedElements;
+        }
+
+        // no further processing required
+        if (removeMatchedSelectors === false) {
+          return;
+        }
+
+        // clean up matched class + ID attribute values
+        for (const selector of sortedSelectors) {
+          if (selector.matchedElements == null) {
+            continue;
+          }
+
+          if (onlyMatchedOnce && selector.matchedElements.length > 1) {
+            // skip selectors that match more than once if option onlyMatchedOnce is enabled
+            continue;
+          }
+
+          for (const selectedEl of selector.matchedElements) {
+            // class
+            const classList = new Set(
+              selectedEl.attributes.class == null
+                ? null
+                : selectedEl.attributes.class.split(' ')
+            );
+            /**
+             * csstree v2 changed this type
+             * @type {csstree.CssNode}
+             */
+            const firstSubSelector = toAny(selector.node.children.first);
+            if (
+              firstSubSelector != null &&
+              firstSubSelector.type === 'ClassSelector'
+            ) {
+              classList.delete(firstSubSelector.name);
+            }
+            if (classList.size === 0) {
+              delete selectedEl.attributes.class;
+            } else {
+              selectedEl.attributes.class = Array.from(classList).join(' ');
+            }
+
+            // ID
+            if (
+              firstSubSelector != null &&
+              firstSubSelector.type === 'IdSelector'
+            ) {
+              if (selectedEl.attributes.id === firstSubSelector.name) {
+                delete selectedEl.attributes.id;
+              }
+            }
+          }
+        }
+
+        for (const style of styles) {
+          csstree.walk(style.cssAst, {
+            visit: 'Rule',
+            enter: function (node, item, list) {
+              // clean up <style/> rulesets without any css selectors left
+              if (
+                node.type === 'Rule' &&
+                node.prelude.type === 'SelectorList' &&
+                // csstree v2 changed this type
+                toAny(node.prelude.children.isEmpty)
+              ) {
+                list.remove(item);
+              }
+            },
+          });
+
+          // csstree v2 changed this type
+          if (toAny(style.cssAst.children.isEmpty)) {
+            // remove emtpy style element
+            detachNodeFromParent(style.node, style.parentNode);
+          } else {
+            // update style element if any styles left
+            const firstChild = style.node.children[0];
+            if (firstChild.type === 'text' || firstChild.type === 'cdata') {
+              firstChild.value = csstree.generate(style.cssAst);
+            }
+          }
+        }
+      },
+    },
+  };
+};