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

3 files changed, 216 insertions, 0 deletions

diff --git a/node_modules/postcss-discard-comments/src/index.js b/node_modules/postcss-discard-comments/src/index.js
new file mode 100644
index 00000000..8ebd8590
--- /dev/null
+++ b/node_modules/postcss-discard-comments/src/index.js
@@ -0,0 +1,153 @@
+'use strict';
+const CommentRemover = require('./lib/commentRemover');
+const commentParser = require('./lib/commentParser');
+
+/** @typedef {object} Options
+ *  @property {boolean=} removeAll
+ *  @property {boolean=} removeAllButFirst
+ *  @property {(s: string) => boolean=} remove
+ */
+/**
+ * @type {import('postcss').PluginCreator<Options>}
+ * @param {Options} opts
+ * @return {import('postcss').Plugin}
+ */
+function pluginCreator(opts = {}) {
+  const remover = new CommentRemover(opts);
+  const matcherCache = new Map();
+  const replacerCache = new Map();
+
+  /**
+   * @param {string} source
+   * @return {[number, number, number][]}
+   */
+  function matchesComments(source) {
+    if (matcherCache.has(source)) {
+      return matcherCache.get(source);
+    }
+
+    const result = commentParser(source).filter(([type]) => type);
+
+    matcherCache.set(source, result);
+
+    return result;
+  }
+
+  /**
+   * @param {string} source
+   * @param {(s: string) => string[]} space
+   * @return {string}
+   */
+  function replaceComments(source, space, separator = ' ') {
+    const key = source + '@|@' + separator;
+
+    if (replacerCache.has(key)) {
+      return replacerCache.get(key);
+    }
+    const parsed = commentParser(source).reduce((value, [type, start, end]) => {
+      const contents = source.slice(start, end);
+
+      if (!type) {
+        return value + contents;
+      }
+
+      if (remover.canRemove(contents)) {
+        return value + separator;
+      }
+
+      return `${value}/*${contents}*/`;
+    }, '');
+
+    const result = space(parsed).join(' ');
+
+    replacerCache.set(key, result);
+
+    return result;
+  }
+
+  return {
+    postcssPlugin: 'postcss-discard-comments',
+
+    OnceExit(css, { list }) {
+      css.walk((node) => {
+        if (node.type === 'comment' && remover.canRemove(node.text)) {
+          node.remove();
+
+          return;
+        }
+
+        if (typeof node.raws.between === 'string') {
+          node.raws.between = replaceComments(node.raws.between, list.space);
+        }
+
+        if (node.type === 'decl') {
+          if (node.raws.value && node.raws.value.raw) {
+            if (node.raws.value.value === node.value) {
+              node.value = replaceComments(node.raws.value.raw, list.space);
+            } else {
+              node.value = replaceComments(node.value, list.space);
+            }
+
+            /** @type {null | {value: string, raw: string}} */ (
+              node.raws.value
+            ) = null;
+          }
+
+          if (node.raws.important) {
+            node.raws.important = replaceComments(
+              node.raws.important,
+              list.space
+            );
+
+            const b = matchesComments(node.raws.important);
+
+            node.raws.important = b.length ? node.raws.important : '!important';
+          } else {
+            node.value = replaceComments(node.value, list.space);
+          }
+
+          return;
+        }
+
+        if (
+          node.type === 'rule' &&
+          node.raws.selector &&
+          node.raws.selector.raw
+        ) {
+          node.raws.selector.raw = replaceComments(
+            node.raws.selector.raw,
+            list.space,
+            ''
+          );
+
+          return;
+        }
+
+        if (node.type === 'atrule') {
+          if (node.raws.afterName) {
+            const commentsReplaced = replaceComments(
+              node.raws.afterName,
+              list.space
+            );
+
+            if (!commentsReplaced.length) {
+              node.raws.afterName = commentsReplaced + ' ';
+            } else {
+              node.raws.afterName = ' ' + commentsReplaced + ' ';
+            }
+          }
+
+          if (node.raws.params && node.raws.params.raw) {
+            node.raws.params.raw = replaceComments(
+              node.raws.params.raw,
+              list.space
+            );
+          }
+        }
+      });
+    },
+  };
+}
+
+pluginCreator.postcss = true;
+module.exports = pluginCreator;
diff --git a/node_modules/postcss-discard-comments/src/lib/commentParser.js b/node_modules/postcss-discard-comments/src/lib/commentParser.js
new file mode 100644
index 00000000..a8834701
--- /dev/null
+++ b/node_modules/postcss-discard-comments/src/lib/commentParser.js
@@ -0,0 +1,31 @@
+'use strict';
+
+/**
+ * @param {string} input
+ * @return {[number, number, number][]}
+ */
+module.exports = function commentParser(input) {
+  /** @type [number, number, number][] */
+  const tokens = [];
+  const length = input.length;
+  let pos = 0;
+  let next;
+
+  while (pos < length) {
+    next = input.indexOf('/*', pos);
+
+    if (~next) {
+      tokens.push([0, pos, next]);
+      pos = next;
+
+      next = input.indexOf('*/', pos + 2);
+      tokens.push([1, pos + 2, next]);
+      pos = next + 2;
+    } else {
+      tokens.push([0, pos, length]);
+      pos = length;
+    }
+  }
+
+  return tokens;
+};
diff --git a/node_modules/postcss-discard-comments/src/lib/commentRemover.js b/node_modules/postcss-discard-comments/src/lib/commentRemover.js
new file mode 100644
index 00000000..6d0dd81b
--- /dev/null
+++ b/node_modules/postcss-discard-comments/src/lib/commentRemover.js
@@ -0,0 +1,32 @@
+'use strict';
+
+/** @param {import('../index.js').Options} options */
+function CommentRemover(options) {
+  this.options = options;
+}
+/**
+ * @param {string} comment
+ * @return {boolean | undefined}
+ */
+CommentRemover.prototype.canRemove = function (comment) {
+  const remove = this.options.remove;
+
+  if (remove) {
+    return remove(comment);
+  } else {
+    const isImportant = comment.indexOf('!') === 0;
+
+    if (!isImportant) {
+      return true;
+    }
+
+    if (this.options.removeAll || this._hasFirst) {
+      return true;
+    } else if (this.options.removeAllButFirst && !this._hasFirst) {
+      this._hasFirst = true;
+      return false;
+    }
+  }
+};
+
+module.exports = CommentRemover;