generated from eblume/project-template
52 lines
1.9 KiB
Lua
52 lines
1.9 KiB
Lua
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--- Buffer-backed nodes (tech-spec §8): a node's markdown body is edited in a
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--- real buffer named `heph://node/<id>`. `:e` loads it via `node.get`; `:w`
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--- saves the whole buffer back via `node.update` (the backend CRDT-diffs the
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--- whole-buffer text, so sending the full body is correct and idempotent).
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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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--- `BufReadCmd` handler for `heph://node/<id>`: load the body into the buffer.
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function M.read(buf, uri)
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local _, id = util.parse_uri(uri)
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if not id then
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error("heph: not a node uri: " .. tostring(uri))
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end
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local node = rpc.call("node.get", { id = id })
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local body = (node and node.body) or ""
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-- `plain` split keeps a trailing "" element for a trailing newline, so the
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-- body round-trips exactly through `table.concat` on write.
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vim.api.nvim_buf_set_lines(buf, 0, -1, false, vim.split(body, "\n", { plain = true }))
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vim.b[buf].heph_node_id = id
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vim.b[buf].heph_node_kind = (node and node.kind) or "doc"
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vim.bo[buf].buftype = "acwrite" -- written via BufWriteCmd, not to a file
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vim.bo[buf].filetype = "markdown"
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vim.bo[buf].fileformat = "unix"
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vim.bo[buf].modified = false
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require("heph.link").attach(buf)
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end
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--- `BufWriteCmd` handler: persist the whole buffer as the node body.
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function M.write(buf, _uri)
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local id = vim.b[buf].heph_node_id
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if not id then
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error("heph: buffer has no heph node id")
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end
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local lines = vim.api.nvim_buf_get_lines(buf, 0, -1, false)
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rpc.call("node.update", { id = id, body = table.concat(lines, "\n") })
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vim.bo[buf].modified = false
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end
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--- Open (or focus) the buffer for node `id`.
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function M.open(id)
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vim.cmd.edit(util.node_uri(id))
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end
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--- Force-reload the buffer for node `id` from the daemon (discards local edits).
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function M.reload(id)
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vim.cmd("edit! " .. vim.fn.fnameescape(util.node_uri(id)))
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end
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return M
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