[FEATURE] File viewer: keep line position when toggling between source and preview modes
Preflight Checklist
- [x] I have searched existing requests and this feature hasn't been requested yet
- [x] This is a single feature request (not multiple features)
Problem Statement
Editing needs source mode (line numbers, exact positions); reading tables and diagrams needs preview mode. Today switching modes loses the line position, so a line number obtained in one mode is not usable in the other, and I must decide which mode to open in before I know what I need. Line information is simply dropped at the mode boundary. Desktop v2.1.237, Windows 11.
Proposed Solution
Preserve position across the toggle in both directions: source -> preview scrolls to the rendered element that corresponds to that source line (the way editor/preview scroll-sync works in common markdown editors), and preview -> source lands on the source line for the element on screen. Then a :line link can open in either mode and the position survives the switch - no need to pick a mode up front.
Alternative Solutions
Opening the same file twice (once per mode) and matching by eye; or reading markdown as raw source only and giving up rendered tables. Both are workarounds for information the app already has.
Priority
Medium - Would be very helpful
Feature Category
File operations
Use Case Example
- A receipt link opens a 5000-line markdown log at line 5342 in source mode - I confirm the diff is what I expected.
- The section contains a comparison table, so I toggle to preview to actually read it - and land at the top of the file, losing my place.
- I scroll/search to find the section again, read the table, then toggle back to source to fix a cell - and lose my place a second time.
- With scroll-sync, both toggles keep me on that section and the round trip costs nothing.
Additional Context
Filed alongside a companion request about markdown :line links opening in source mode. That one is the entry point; this one is what makes the two modes usable together - with both, the mode you open in stops mattering.