Table Title render function does not have enough information about the current column that is sorted

[swillis12]

• I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

Steps to reproduce

Open the codesandbox console and click sort on name, observe the log message.

"ascend/descend, but no column name
Object {filters: Object, sortOrder: null}"

What is expected?

The object should contain the "dataIndex" of the currently sorted column/columns

What is actually happening?

DataIndex is not available to the title render function so the ascending/descending information cannot be used to render a header for a specific column.

Other

This has already been mentioned here a couple of times: #11246 (comment)

Environment	Info
antd	3.23.4
React	16.9.0
System	Mac OS X Mojave
Browser	Chrome

[afc163]

You already know which is the column when setting title.

const renderTitle = (dataIndex, info) => {
  console.log(dataIndex, info);
  return "Title";
};

...

  {
    title: (info) => renderTitle('name', info),
    dataIndex: "name",
    key: "name",
    render: text => <a>{text}</a>,
    sorter: (a, b) => (a.name > b.name ? (1 ? b.name > a.name : -1) : 0)
  },
  {
    title: (info) => renderTitle('age', info),
    dataIndex: "age",
    key: "age"
  },

[swillis12]

@afc163 There is no way to tell which column is sorted from the info argument that is passed in in your example. All we get is "ascend/descend" regardless of which column is currently sorted.

E.g. Sort the age column "ascending" and the the info object passed to the renderTitle function for the NAME column will only contain { sortOrder: "ascend" } even though the name column is not even sorted.

PR Created on feature branch: #19012