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--- @since 25.6.11
local get = ya.sync(function(st, url) return st.last == url and st.level end)
local save = ya.sync(function(st, url, new)
local h = cx.active.current.hovered
if h and h.url == url then
st.last, st.level = url, new
return true
end
end)
local lock = ya.sync(function(st, url, old, new)
if st.last == url and st.level == old then
st.level = new
return true
end
end)
local move = ya.sync(function(st)
local h = cx.active.current.hovered
if not h then
return
end
if st.last ~= h.url then
st.last, st.level = Url(h.url), 0
end
return { url = h.url, level = st.level }
end)
local function end_(job, err)
if not job.old_level then
ya.preview_widget(job, err and ui.Text(err):area(job.area):wrap(ui.Wrap.YES))
elseif err then
ya.notify { title = "Zoom", content = tostring(err), timeout = 5, level = "error" }
end
end
local function canvas(area)
local cw, ch = rt.term.cell_size()
if not cw then
return rt.preview.max_width, rt.preview.max_height
end
return math.min(rt.preview.max_width, math.floor(area.w * cw)),
math.min(rt.preview.max_height, math.floor(area.h * ch))
end
local function peek(_, job)
local url = job.file.url
local info, err = ya.image_info(url)
if not info then
return end_(job, Err("Failed to get image info: %s", err))
end
local level = ya.clamp(-10, job.new_level or get(Url(url)) or tonumber(job.args[1]) or 0, 10)
local sync = function()
if job.old_level then
return lock(url, job.old_level, level)
else
return save(url, level)
end
end
local max_w, max_h = canvas(job.area)
local min_w, min_h = math.min(max_w, info.w), math.min(max_h, info.h)
local new_w = min_w + math.floor(min_w * level * 0.1)
local new_h = min_h + math.floor(min_h * level * 0.1)
if new_w > max_w or new_h > max_h then
if job.old_level then
return sync() -- Image larger than available preview area after zooming
else
new_w, new_h = max_w, max_h -- Run as a previewer, render the image anyway
end
end
local tmp = os.tmpname()
-- stylua: ignore
local status, err = Command("magick"):arg {
tostring(url),
"-auto-orient", "-strip",
"-sample", string.format("%dx%d", new_w, new_h),
"-quality", rt.preview.image_quality,
string.format("JPG:%s", tmp),
}:status()
if not status then
end_(job, Err("Failed to run `magick` command: %s", err))
elseif not status.success then
end_(job, Err("`magick` command exited with error code %d", status.code))
elseif sync() then
ya.image_show(Url(tmp), job.area)
end
end_(job)
end
local function entry(self, job)
local st = move()
if not st then
return
end
local motion = tonumber(job.args[1]) or 0
local new = ya.clamp(-10, st.level + motion, 10)
if new ~= st.level then
peek(self, {
area = ui.area("preview"),
args = {},
file = { url = st.url }, -- FIXME: use `File` instead of a dummy file
skip = 0,
new_level = new,
old_level = st.level,
})
end
end
return { peek = peek, entry = entry }
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