Commits on Oct 15, 2022

1. Add Vim script support and a popup menu for data lookup …

   Add a new Vim script function `showdefinition()` that allows Vim script
   to call back to macOS's data lookup feature and show the definition /
   URL preview / etc for any text, at a designated row/col position. If the
   row/col are not provided this function will just show it at the cursor.
   
   Also, add a new autoload/macvim.vim for utility functions to call
   showdefinition() for selected texts and the word under cursor. Make a
   new right-click popup menu "Look Up" call that when there are selected
   texts in visual mode to make the lookup functionality easier to access
   for users without a trackpad (since Ctrl-Cmd-D is a little obscure and
   unwieldy to use). For the utility functions, it was a little hard to
   determine how to get the text under visual selection without yanking (we
   don't want to pollute the register here), and just implemented a
   function to take care of all the edge cases including visual/block/line
   modes and selection=exclusive. It could be useful in other situations.
   
   As a side refactor, change the message handler in MacVim from if/else to
   switch case. In optimized builds, they both essentially optimize to the
   same thing, but for debug builds, the if/else statements have to step
   through one by one, and switch case just makes more sense for a giant
   message ID lookup like this.
   
   Part of Epic macvim-dev#1311

   

   ychin committed Oct 15, 2022
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