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feat: add expandable diff excerpts with configurable context

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Valdemar Høgsvig Lorenzen
2026-10-11 01:45:13 +02:00
parent 5e0700bb8c
commit 704dce2539
8 changed files with 590 additions and 21 deletions
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docs/configuration.md
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@@ -16,6 +16,8 @@ Vamp.configure do |config|
config.file_explorer_side = "right"
config.file_explorer_view = "tree"
config.file_picker_view = "tree"
config.diff_context_lines = 10
config.diff_expand_lines = 15
config.bind "ctrl+h", config.core.left, mode: config.modes.tree
config.bind "ctrl+l", config.core.right, mode: config.modes.tree
config.plugin "plugins/greeting.rb"
@@ -40,6 +42,8 @@ Plugin paths resolve relative to the config file, not the shell's working direct
`config.file_explorer_side` defaults to `"right"`; other choices are `"left"`, `"top"`, and `"bottom"`. Independent `file_explorer_view` / `file_picker_view` preferences both default to `"tree"` and accept `"list"` as an alternative. Invalid preference strings report notices and retain defaults while valid bindings still install. Non-string/empty values disable the whole configuration like other Ruby type errors.
`config.clipboard_mode` accepts `"system"` (default) or `"separate"`. An invalid policy string reports a notice and retains System while valid bindings still install; non-string/empty values reject the whole Ruby configuration.
`config.diff_context_lines = 10` sets how many unchanged aligned lines appear above and below each diff change; it defaults to `10` and accepts nonnegative integers, including `0` for changes only. `config.diff_expand_lines = 15` sets how many additional lines each directional expansion reveals per keypress; it defaults to `15` and accepts positive integers. Both are bounded by the platform's Rust `usize` maximum (`18446744073709551615` on 64-bit systems). Floats, strings, booleans, negative or oversized values, and a zero expansion step reject the whole Ruby configuration.
## Actions and modes
`config.core` exposes the built-in actions below as immutable `Action` values; `config.modes` exposes immutable `Mode` values. Misspelled methods fail during configuration evaluation, and `bind` rejects the wrong value type. Built-in action strings, built-in Ex aliases (such as `"q"` or `"w"`), and mode strings are not accepted. Only plugin-owned commands use exact string names (`"greet"`, without `:` or arguments) and can only be bound in Normal mode. Interactive Ex commands such as `:q` and `:w path` remain textual. Ruby provides runtime checks, not compile-time checking; the editor still validates action/mode compatibility.