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node_modules/svgo/plugins/removeAttrs.js 2.49 KB
aaac7fed   liuqimichale   add
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  'use strict';
  
  var ELEM_SEP = ':';
  
  exports.type = 'perItem';
  
  exports.active = false;
  
  exports.description = 'removes specified attributes';
  
  exports.params = {
      attrs: []
  };
  
  /**
   * Remove attributes
   *
   * @param attrs:
   *
   *   format: [ element* : attribute* ]
   *
   *   element   : regexp (wrapped into ^...$), single * or omitted > all elements
   *   attribute : regexp (wrapped into ^...$)
   *
   *   examples:
   *
   *     > basic: remove fill attribute
   *     ---
   *     removeAttrs:
   *       attrs: 'fill'
   *
   *     > remove fill attribute on path element
   *     ---
   *       attrs: 'path:fill'
   *
   *
   *     > remove all fill and stroke attribute
   *     ---
   *       attrs:
   *         - 'fill'
   *         - 'stroke'
   *
   *     [is same as]
   *
   *       attrs: '(fill|stroke)'
   *
   *     [is same as]
   *
   *       attrs: '*:(fill|stroke)'
   *
   *     [is same as]
   *
   *       attrs: '.*:(fill|stroke)'
   *
   *
   *     > remove all stroke related attributes
   *     ----
   *     attrs: 'stroke.*'
   *
   *
   * @param {Object} item current iteration item
   * @param {Object} params plugin params
   * @return {Boolean} if false, item will be filtered out
   *
   * @author Benny Schudel
   */
  exports.fn = function(item, params) {
  
          // wrap into an array if params is not
      if (!Array.isArray(params.attrs)) {
          params.attrs = [params.attrs];
      }
  
      if (item.isElem()) {
  
              // prepare patterns
          var patterns = params.attrs.map(function(pattern) {
  
                  // apply to all elements if specifc element is omitted
              if (pattern.indexOf(ELEM_SEP) === -1) {
                  pattern = ['.*', ELEM_SEP, pattern].join('');
              }
  
                  // create regexps for element and attribute name
              return pattern.split(ELEM_SEP)
                  .map(function(value) {
  
                          // adjust single * to match anything
                      if (value === '*') { value = '.*'; }
  
                      return new RegExp(['^', value, '$'].join(''), 'i');
                  });
  
          });
  
              // loop patterns
          patterns.forEach(function(pattern) {
  
                  // matches element
              if (pattern[0].test(item.elem)) {
  
                      // loop attributes
                  item.eachAttr(function(attr) {
                      var name = attr.name;
  
                          // matches attribute name
                      if (pattern[1].test(name)) {
                          item.removeAttr(name);
                      }
  
                  });
  
              }
  
          });
  
      }
  
  };