初始化代码

uniapp/uni-app/components/miniprogram_npm/wxml-to-canvas/xml-parser.js

@@ -0,0 +1,153 @@
+/**
+ * Module dependencies.
+ */
+
+/**
+ * Expose `parse`.
+ */
+
+/**
+ * Parse the given string of `xml`.
+ *
+ * @param {String} xml
+ * @return {Object}
+ * @api public
+ */
+function parse(xml) {
+  xml = xml.trim(); // strip comments
+
+  xml = xml.replace(/<!--[\s\S]*?-->/g, '');
+  return document();
+  /**
+   * XML document.
+   */
+
+  function document() {
+    return {
+      declaration: declaration(),
+      root: tag()
+    };
+  }
+  /**
+   * Declaration.
+   */
+
+
+  function declaration() {
+    const m = match(/^<\?xml\s*/);
+    if (!m) return; // tag
+
+    const node = {
+      attributes: {}
+    }; // attributes
+
+    while (!(eos() || is('?>'))) {
+      const attr = attribute();
+      if (!attr) return node;
+      node.attributes[attr.name] = attr.value;
+    }
+
+    match(/\?>\s*/);
+    return node;
+  }
+  /**
+   * Tag.
+   */
+
+
+  function tag() {
+    const m = match(/^<([\w-:.]+)\s*/);
+    if (!m) return; // name
+
+    const node = {
+      name: m[1],
+      attributes: {},
+      children: []
+    }; // attributes
+
+    while (!(eos() || is('>') || is('?>') || is('/>'))) {
+      const attr = attribute();
+      if (!attr) return node;
+      node.attributes[attr.name] = attr.value;
+    } // self closing tag
+
+
+    if (match(/^\s*\/>\s*/)) {
+      return node;
+    }
+
+    match(/\??>\s*/); // content
+
+    node.content = content(); // children
+
+    let child;
+
+    while (child = tag()) {
+      node.children.push(child);
+    } // closing
+
+
+    match(/^<\/[\w-:.]+>\s*/);
+    return node;
+  }
+  /**
+   * Text content.
+   */
+
+
+  function content() {
+    const m = match(/^([^<]*)/);
+    if (m) return m[1];
+    return '';
+  }
+  /**
+   * Attribute.
+   */
+
+
+  function attribute() {
+    const m = match(/([\w:-]+)\s*=\s*("[^"]*"|'[^']*'|\w+)\s*/);
+    if (!m) return;
+    return {
+      name: m[1],
+      value: strip(m[2])
+    };
+  }
+  /**
+   * Strip quotes from `val`.
+   */
+
+
+  function strip(val) {
+    return val.replace(/^['"]|['"]$/g, '');
+  }
+  /**
+   * Match `re` and advance the string.
+   */
+
+
+  function match(re) {
+    const m = xml.match(re);
+    if (!m) return;
+    xml = xml.slice(m[0].length);
+    return m;
+  }
+  /**
+   * End-of-source.
+   */
+
+
+  function eos() {
+    return xml.length == 0;
+  }
+  /**
+   * Check for `prefix`.
+   */
+
+
+  function is(prefix) {
+    return xml.indexOf(prefix) == 0;
+  }
+}
+
+module.exports = parse;