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Render state already tracks the selected cell range for each viewport row, but C renderers could only get the full terminal selection. That required consumers to map global selection pins back into row-local spans themselves. Add row selection data to the render-state row API. Querying the new row data returns GHOSTTY_NO_VALUE for unselected rows and writes the inclusive start and end columns for selected rows. The render example now demonstrates setting a selection and reading the row-local range while iterating rows.
Example: ghostty-vt Render State
This contains an example of how to use the ghostty-vt render-state API
to create a render state, update it from terminal content, iterate rows
and cells, read styles and colors, inspect cursor and row-local selection
state, and manage dirty tracking.
This uses a build.zig and Zig to build the C program so that we
can reuse a lot of our build logic and depend directly on our source
tree, but Ghostty emits a standard C library that can be used with any
C tooling.
Usage
Run the program:
zig build run