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56 lines
2.5 KiB
Lua
56 lines
2.5 KiB
Lua
--[[
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Centralizes migration concerns for LuaSettings & DocSettings
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--]]
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local DocSettings = require("docsettings")
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local LuaSettings = require("luasettings")
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local logger = require("logger")
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local SettingsMigration = {}
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-- Shockingly, handles settings migration
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-- NOTE: supports LuaSettings & DocSettings objects as input, as both implement the same API
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function SettingsMigration:migrateSettings(config)
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-- Figure out what kind of object we were passed, to make the logging more precise
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local cfg_mt_idx = getmetatable(config).__index
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local cfg_class
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if cfg_mt_idx == DocSettings then
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cfg_class = "book"
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elseif cfg_mt_idx == LuaSettings then
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cfg_class = "global"
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else
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-- Input object isn't a supported *Settings class, warn & abort instead of going kablooey.
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logger.warn("Passed an unsupported object class to SettingsMigration!")
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return
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end
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-- Fine-grained CRe margins (https://github.com/koreader/koreader/pull/4945)
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if config:has("copt_page_margins") then
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local old_margins = config:readSetting("copt_page_margins")
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logger.info("Migrating old", cfg_class, "CRe margin settings: L", old_margins[1], "T", old_margins[2], "R", old_margins[3], "B", old_margins[4])
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-- Format was: {left, top, right, bottom}
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config:saveSetting("copt_h_page_margins", {old_margins[1], old_margins[3]})
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config:saveSetting("copt_t_page_margin", old_margins[2])
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config:saveSetting("copt_b_page_margin", old_margins[4])
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-- Wipe it
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config:delSetting("copt_page_margins")
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end
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-- Space condensing to Word spacing (https://github.com/koreader/koreader/pull/5655)
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-- From a single number (space condensing) to a table of 2 numbers ({space width scale, space condensing}).
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-- Be conservative and don't change space width scale: use 100%
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if config:hasNot("copt_word_spacing") and config:has("copt_space_condensing") then
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local space_condensing = config:readSetting("copt_space_condensing")
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logger.info("Migrating old", cfg_class, "CRe space condensing:", space_condensing)
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config:saveSetting("copt_word_spacing", { 100, space_condensing })
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if cfg_class == "book" then
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-- a bit messy that some settings are saved twice in DocSettings, with
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-- and without a copt_ prefix, and they must be in sync
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config:saveSetting("word_spacing", { 100, space_condensing })
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end
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end
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end
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return SettingsMigration
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