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--- @since 25.2.7
local M = {}
function M:peek(job)
local start, cache = os.clock(), ya.file_cache(job)
if not cache then
return
end
local ok, err = self:preload(job)
if not ok or err then
return
end
ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
ya.image_show(cache, job.area)
ya.preview_widgets(job, {})
end
function M:seek(job)
local h = cx.active.current.hovered
if h and h.url == job.file.url then
local step = ya.clamp(-1, job.units, 1)
ya.manager_emit("peek", { math.max(0, cx.active.preview.skip + step), only_if = job.file.url })
end
end
function M:doc2pdf(job)
local tmp = "/tmp/yazi-" .. ya.uid() .. "/" .. ya.hash("office.yazi") .. "/"
--[[ For Future Reference: Regarding `libreoffice` as preconverter
1. It prints errors to stdout (always, doesn't matter if it succeeded or it failed)
2. Always writes the converted files to the filesystem, so no "Mario|Bros|Piping|Magic" for the data stream (https://ask.libreoffice.org/t/using-convert-to-output-to-stdout/38753)
3. The `pdf:draw_pdf_Export` filter needs literal double quotes when defining its options (https://help.libreoffice.org/latest/en-US/text/shared/guide/pdf_params.html?&DbPAR=SHARED&System=UNIX#generaltext/shared/guide/pdf_params.xhp)
3.1 Regarding double quotes and Lua strings, see https://www.lua.org/manual/5.1/manual.html#2.1 --]]
local libreoffice = Command("libreoffice")
:arg({
"--headless",
"--convert-to",
"pdf:draw_pdf_Export:{"
.. '"PageRange":{'
.. '"type":"string",'
.. '"value":'
.. '"'
.. job.skip + 1
.. '"'
.. "}"
.. "}",
"--outdir",
tmp,
tostring(job.file.url),
})
:stdin(Command.NULL)
:stdout(Command.PIPED)
:stderr(Command.NULL)
:output()
if not libreoffice.status.success then
ya.err(
libreoffice.stdout:match("LibreOffice .+"):gsub("%\n.*", "")
.. " "
.. libreoffice.stdout:match("Error .+"):gsub("%\n.*", "")
)
return nil, Err("Failed to preconvert `%s` to a temporary PDF", job.file.name)
end
local tmp = tmp .. job.file.name:gsub("%.[^%.]+$", ".pdf")
local read_permission = io.open(tmp, "r")
if not read_permission then
return nil, Err("Failed to read `%s`: make sure file exists and have read access", tmp)
end
read_permission:close()
return tmp
end
function M:preload(job)
local cache = ya.file_cache(job)
if not cache or fs.cha(cache) then
return true
end
local tmp_pdf, err = self:doc2pdf(job)
if not tmp_pdf then
return true, Err(" " .. "%s", err)
end
local output, err = Command("pdftoppm")
:arg({
"-singlefile",
"-jpeg",
"-jpegopt",
"quality=" .. rt.preview.image_quality,
"-f",
1,
tostring(tmp_pdf),
})
:stdout(Command.PIPED)
:stderr(Command.PIPED)
:output()
local rm_tmp_pdf, rm_err = fs.remove("file", Url(tmp_pdf))
if not rm_tmp_pdf then
return true, Err("Failed to remove %s, error: %s", tmp_pdf, rm_err)
end
if not output then
return true, Err("Failed to start `pdftoppm`, error: %s", err)
elseif not output.status.success then
local pages = tonumber(output.stderr:match("the last page %((%d+)%)")) or 0
if job.skip > 0 and pages > 0 then
ya.mgr_emit("peek", { math.max(0, pages - 1), only_if = job.file.url, upper_bound = true })
end
return true, Err("Failed to convert %s to image, stderr: %s", tmp_pdf, output.stderr)
end
return fs.write(cache, output.stdout)
end
return M
|
