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71 lines
2.3 KiB
Lua
71 lines
2.3 KiB
Lua
--[[
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Subclass of ImageWidget to show icons
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]]
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local DataStorage = require("datastorage")
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local ImageWidget = require("ui/widget/imagewidget")
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local Screen = require("device").screen
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-- Directories to look for icons by name, with any of the accepted suffixes
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local ICONS_DIRS = {}
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local user_icons_dir = DataStorage:getSettingsDir() .. "/icons"
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if lfs.attributes(user_icons_dir, "mode") == "directory" then
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table.insert(ICONS_DIRS, user_icons_dir)
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end
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-- Default icons (material design light)
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table.insert(ICONS_DIRS, "resources/icons/mdlight")
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-- Fallback directories
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table.insert(ICONS_DIRS, "resources/icons")
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table.insert(ICONS_DIRS, "resources")
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-- Supported icon suffixes
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local ICONS_EXTS = { ".svg", ".png" }
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-- Show this icon instead of crashing if we can't find any icon
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local ICON_NOT_FOUND = "resources/icons/icon-not-found.svg"
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-- Icon filepath location cache
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local ICONS_PATH = {}
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local IconWidget = ImageWidget:extend{
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-- The icon filename should be provided without any path
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icon = ICON_NOT_FOUND, -- show this if not provided
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-- See ImageWidget for other available options,
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-- we only start with a few different defaults, that can
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-- be overriden by callers.
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width = Screen:scaleBySize(DGENERIC_ICON_SIZE), -- our icons are square
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height = Screen:scaleBySize(DGENERIC_ICON_SIZE),
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alpha = true, -- our icons have a transparent background
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is_icon = true, -- avoid dithering in ImageWidget:paintTo()
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}
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function IconWidget:init()
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if self.image or self.file then
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-- In case we're created with one of these: just be an ImageWidget.
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return
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end
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-- See if already seen and full path cached
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self.file = ICONS_PATH[self.icon]
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if not self.file then
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-- Not yet seen, look for it
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for _, dir in ipairs(ICONS_DIRS) do
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for __, ext in ipairs(ICONS_EXTS) do
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local path = dir .. "/" .. self.icon .. ext
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if lfs.attributes(path, "mode") == "file" then
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self.file = path
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break
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end
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end
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if self.file then
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break
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end
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end
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if not self.file then
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self.file = ICON_NOT_FOUND
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end
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ICONS_PATH[self.icon] = self.file
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end
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end
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return IconWidget
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