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koreader/frontend/ui/screensaver.lua

151 lines
5.0 KiB
Lua

local DocumentRegistry = require("document/documentregistry")
local UIManager = require("ui/uimanager")
local Device = require("device")
local Screen = Device.screen
local DocSettings = require("docsettings")
local logger = require("logger")
local Screensaver = {
}
local function createWidgetFromImage(image_widget)
if image_widget then
local AlphaContainer = require("ui/widget/container/alphacontainer")
local CenterContainer = require("ui/widget/container/centercontainer")
return AlphaContainer:new{
alpha = 1,
height = Screen:getHeight(),
width = Screen:getWidth(),
CenterContainer:new{
dimen = Screen:getSize(),
image_widget,
}
}
end
end
local function createWidgetFromFile(file)
if lfs.attributes(file, "mode") == "file" then
local ImageWidget = require("ui/widget/imagewidget")
return createWidgetFromImage(
ImageWidget:new{
file = file,
file_do_cache = false,
height = Screen:getHeight(),
width = Screen:getWidth(),
scale_factor = 0, -- scale to fit height/width
})
end
end
local function getRandomImage(dir)
if string.sub(dir, string.len(dir)) ~= "/" then
dir = dir .. "/"
end
local pics = {}
local i = 0
math.randomseed(os.time())
for entry in lfs.dir(dir) do
if lfs.attributes(dir .. entry, "mode") == "file" then
local extension =
string.lower(string.match(entry, ".+%.([^.]+)") or "")
if extension == "jpg"
or extension == "jpeg"
or extension == "png" then
i = i + 1
pics[i] = entry
end
end
end
if i == 0 then
return nil
end
return createWidgetFromFile(dir .. pics[math.random(i)])
end
function Screensaver:isUsingBookCover()
-- this setting is on by default
return G_reader_settings:readSetting('use_lastfile_as_screensaver') ~= false
end
function Screensaver:getCoverImage(file)
local ImageWidget = require("ui/widget/imagewidget")
local doc = DocumentRegistry:openDocument(file)
if not doc then return end
local image = doc:getCoverPageImage()
doc:close()
local lastfile = G_reader_settings:readSetting("lastfile")
local doc_settings = DocSettings:open(lastfile)
if image then
local img_widget = ImageWidget:new{
image = image,
height = Screen:getHeight(),
width = Screen:getWidth(),
scale_factor = doc_settings:readSetting("proportional_screensaver") and 0 or nil,
}
return createWidgetFromImage(img_widget)
end
end
function Screensaver:show(kind, default_msg)
logger.dbg("show screensaver")
local InfoMessage = require("ui/widget/infomessage")
local screensaver_settings = G_reader_settings:readSetting(kind .. "_screensaver") or {}
-- first check book cover image, on by default
local screensaver_last_book = screensaver_settings.use_last_file or
G_reader_settings:readSetting("use_lastfile_as_screensaver")
if screensaver_last_book == nil or screensaver_last_book then
local lastfile = G_reader_settings:readSetting("lastfile")
if lastfile then
local doc_settings = DocSettings:open(lastfile)
local exclude = doc_settings:readSetting("exclude_screensaver")
if not exclude then
self.left_msg = self:getCoverImage(lastfile)
end
end
end
-- then screensaver directory or file image
if not self.left_msg then
-- FIXME: rename screensaver_folder to screensaver_path
local screensaver_path = screensaver_settings.path or
G_reader_settings:readSetting("screensaver_folder")
if screensaver_path == nil
and Device.internal_storage_mount_point ~= nil then
screensaver_path =
Device.internal_storage_mount_point .. "screensaver"
end
if screensaver_path then
local mode = lfs.attributes(screensaver_path, "mode")
if mode ~= nil then
if mode == "directory" then
self.left_msg = getRandomImage(screensaver_path)
else
self.left_msg = createWidgetFromFile(screensaver_path)
end
end
end
end
-- fallback to message box
if not self.left_msg then
local msg = screensaver_settings.message or default_msg
if msg then
self.left_msg = InfoMessage:new{ text = msg }
UIManager:show(self.left_msg)
end
else
-- refresh whole screen for other types
UIManager:show(self.left_msg, "full")
end
end
function Screensaver:close()
logger.dbg("close screensaver")
if self.left_msg then
UIManager:close(self.left_msg)
self.left_msg = nil
end
end
return Screensaver