mirror of
https://github.com/sxyazi/yazi.git
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64 lines
1.5 KiB
Lua
64 lines
1.5 KiB
Lua
local M = {}
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function M.msg(job, s) ya.preview_widget(job, ui.Text(ui.Line(s):reverse()):area(job.area):wrap(ui.Wrap.YES)) end
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function M:peek(job)
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local url = job.file.url
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if not url:starts_with("/sys/") and not url:starts_with("/proc/") then
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return self.msg(job, "Empty file")
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end
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local fd, err = fs.access():read(true):open(url)
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if not fd then
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return self.msg(job, "Failed to open file: " .. err)
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end
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local lines, err = M.read_up_to(fd, job.skip, job.area.h)
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ya.drop(fd)
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if not lines then
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self.msg(job, tostring(err))
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elseif lines.n == 0 then
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self.msg(job, "Empty file")
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elseif job.skip > 0 and lines.n < job.skip + job.area.h then
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ya.emit("peek", { math.max(0, lines.n - job.area.h), only_if = url, upper_bound = true })
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else
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ya.preview_widget(job, ui.Text(lines):area(job.area))
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end
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end
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function M:seek(job) require("code"):seek(job) end
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--- @param fd Fd
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--- @param skip integer
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--- @param limit integer
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--- @return { [integer]: string, n: integer }?
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--- @return Error?
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function M.read_up_to(fd, skip, limit)
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local seen, lines = 0, { n = 0 }
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while true do
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local chunk, err = fd:read(4096)
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if not chunk then
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return nil, Err("Failed to read file: %s", err)
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elseif chunk == "" then
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break
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end
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seen = seen + #chunk
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if seen > 5242880 then
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return nil, Err("File too large")
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end
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for line in chunk:gmatch("[^\n]*\n?") do
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lines.n = lines.n + 1
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if lines.n > skip + limit then
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break
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elseif lines.n > skip then
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lines[#lines + 1] = line
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end
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end
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end
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return lines
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end
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return M
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