Redmine

  $(".wiki-edit").on('paste', function(e){

    var items = e.originalEvent.clipboardData.items;

    for (var i = 0 ; i < items.length ; i++) {

      var item = items[i];

      if (item.type.indexOf("image") != -1) {

        var blob = item.getAsFile();

        var urlObj = window.URL || window.webkitURL;

        var filename = 'paste-' + urlObj.createObjectURL(blob).split('/').pop() + '.' + blob.name.split('.').pop();

        var file = new File([blob], filename, {type: blob.type});

        var inputEl = $('input[name="attachments[dummy][file]"]');

        handleFileDropEvent.target = e.target;

        addFile(inputEl, file, true);

      }

    }

  });