71 lines
2.3 KiB
Lua
71 lines
2.3 KiB
Lua
-- A simple per-session task stack.
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-- Allows pushing locations with a note and returning to them later.
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--- @type number Namespace id for the plugin
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local ns = vim.api.nvim_create_namespace("stacc")
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--- @class Location
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--- @field [1] number Buffer Number
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--- @field [2] number ExtMark ID
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--- @field [3] string Description
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--- @field [4] number Current line number
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--- @class stacc
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--- @field locations Location[] Array listing all the locations with newest ones having the highest indices
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--- @field namespace number Namespace ID used for ExtMarks
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local stacc = {
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locations = {};
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namespace = ns;
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}
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stacc.__index = stacc
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--- Pushes a new location to the stack
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--- @param description string A message to display when returning to this location
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function stacc:push(description)
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local bufnr = vim.fn.bufnr()
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local line, column = unpack(vim.api.nvim_win_get_cursor(0))
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line = line - 1 -- 0-based :help api-indexing
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local id = vim.api.nvim_buf_set_extmark(bufnr, ns, line, column, {})
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table.insert(self.locations, {bufnr, id, description, vim.fn.line(".")})
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end
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--- Pops a given number of items from the task stack
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--- Jumps to the last removed item and displays its description
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--- @param count number How many items to pop from the stack
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--- @return string description The description of the current task
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--- @return number bufnr Buffer number of the stack entry
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--- @return number row Line number (1-indexed)
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--- @return number col Column number (1-indexed)
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function stacc:pop(count)
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if count > #self.locations then
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error("stack only has "..#self.locations.." elements.")
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end
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local bufnr, description
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local final = vim.api.nvim_win_get_cursor(0)
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for _=1, count do
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local id
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bufnr, id, description = unpack(table.remove(self.locations))
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final = vim.api.nvim_buf_get_extmark_by_id(bufnr, ns, id, {})
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vim.api.nvim_buf_del_extmark(bufnr, ns, id)
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final[1] = final[1] + 1 -- Make line 1-indexed
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final[2] = final[2] + 1 -- Make column 1-indexed
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final.bufnr = bufnr
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end
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vim.api.nvim_set_current_buf(final.bufnr or 0)
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final.bufnr = nil
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vim.api.nvim_win_set_cursor(0, final)
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return description, bufnr, unpack(final)
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end
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--- Clears the entire stack
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function stacc:clear()
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stacc.pop(#self.locations)
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end
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function stacc:new(new)
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new = new or {}
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new.locations = new.locations or {}
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return setmetatable(new, self)
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end
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return stacc
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