From de0704ff9ad57f53ae42f0f73de189084768679e Mon Sep 17 00:00:00 2001 From: Josh Rahm Date: Mon, 22 Aug 2022 01:01:25 -0600 Subject: Add mark.lua. --- plugin/mark.lua | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 plugin/mark.lua diff --git a/plugin/mark.lua b/plugin/mark.lua new file mode 100644 index 0000000..dd3baa6 --- /dev/null +++ b/plugin/mark.lua @@ -0,0 +1,54 @@ +-- Implementation of middle mark. This mark is always in the middle of the +-- viewport. + +local api = vim.api + +-- Compatibility check. +if not api.nvim_call_function('has', {'usermarks'}) then + return nil +end + +local usermark = require("vim.usermark") + +-- The middle mark is on the middle of the screen. +local middle_mark = {} +function middle_mark.get(self) + local topline = vim.api.nvim_call_function('line', {'w0'}) + local bottomline = vim.api.nvim_call_function('line', {'w$'}) + + return math.floor((topline + bottomline) / 2) +end + +-- Setting the middle mark sets the current cusor line to the middle of the +-- window. Principally this is the same as z. +function middle_mark.set(self) + api.nvim_command('norm z.') +end + +-- The top mark is the first line on the window. Right now scrolloff is ignored, +-- but maybe it shouldn't be. +local top_mark = {} +function top_mark.get(self) + return vim.api.nvim_call_function('line', {'w0'}) +end +-- Setting the top mark move the current line to the top. Principally this is +-- the same mas z +function top_mark.set(self) + api.nvim_command('norm z') +end + +-- Setting the bottom mark moves the current line to the bottom. Principally +-- this is the same as z- +local bottom_mark = {} +function bottom_mark.get(self) + return vim.api.nvim_call_function('line', {'w$'}) +end +-- Setting the bottom mark doesn't do anything. +function bottom_mark.set(self) + api.nvim_command('norm z-') +end + +-- Register all the marks with their respective characters. +usermark.register_handler('-', middle_mark) +usermark.register_handler('+', top_mark) +usermark.register_handler('_', bottom_mark) -- cgit