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.
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 #1311