Double-click to select a variable idea, and highlight the same variables

Turn: https: //blog.csdn.net/lxzpp/article/details/81081162

In fact, this idea has a function, but no background color, where there is likely to be the background color of the editing area and the background color of selected variables, like,

All we need only tune about the background color on it.

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Here came to an end. .