generated from eblume/project-template
62 lines
2 KiB
Lua
62 lines
2 KiB
Lua
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--- `[[wiki-link]]` parsing and following (tech-spec §8).
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---
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--- The cursor grammar mirrors `heph-core`'s `extract.rs`: a span `[[target]]`
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--- or `[[target|display]]`, where the resolvable name is everything left of the
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--- first `|`, trimmed. Resolution goes through `node.resolve` (exact, the same
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--- mapping that materializes stored `wiki` links) — never fuzzy `search`, which
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--- would mis-jump.
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local rpc = require("heph.rpc")
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local util = require("heph.util")
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local M = {}
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--- The wiki target under the cursor on the current line, or nil. Scans for the
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--- `[[...]]` span that contains the cursor column.
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function M.target_under_cursor()
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local line = vim.api.nvim_get_current_line()
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local col = vim.api.nvim_win_get_cursor(0)[2] + 1 -- 1-based byte column
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local from = 1
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while true do
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local open_s, open_e = line:find("[[", from, true)
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if not open_s then
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return nil
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end
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local close_s, close_e = line:find("]]", open_e + 1, true)
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if not close_s then
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return nil
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end
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if col >= open_s and col <= close_e then
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local inner = line:sub(open_e + 1, close_s - 1)
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local target = inner:match("^([^|]*)") or ""
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target = target:gsub("^%s+", ""):gsub("%s+$", "")
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return (#target > 0) and target or nil
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end
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from = close_e + 1
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end
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end
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--- Follow the `[[link]]` under the cursor to its node. Unresolved links are
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--- allowed (tech-spec §5) — an INFO toast, not an error.
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function M.follow()
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local target = M.target_under_cursor()
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if not target then
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util.notify("no [[link]] under cursor", vim.log.levels.WARN)
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return
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end
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local node = rpc.call("node.resolve", { title = target })
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if not node then
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util.notify("unresolved link [[" .. target .. "]]", vim.log.levels.INFO)
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return
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end
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require("heph.node").open(node.id)
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end
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--- Attach the buffer-local `<CR>` follow keymap (only on heph:// buffers).
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function M.attach(buf)
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vim.keymap.set("n", "<CR>", function()
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M.follow()
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end, { buffer = buf, desc = "heph: follow [[link]]" })
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end
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return M
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