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-- mod-version:4
local core = require "core"
local common = require "core.common"
local command = require "core.command"
local config = require "core.config"
local keymap = require "core.keymap"
local style = require "core.style"
local CommandView = require "core.commandview"
local DocView = require "core.docview"
config.plugins.scale = common.merge({
-- The method used to apply the scaling: "code", "ui"
mode = "code",
-- Default scale applied at startup.
default_scale = "autodetect",
-- Allow using CTRL + MouseWheel for changing the scale.
use_mousewheel = true
}, config.plugins.scale)
local scale_steps = 0.05
local current_scale = SCALE
local default_scale = SCALE
local function set_scale(scale)
scale = common.clamp(scale, 0.2, 6)
-- save scroll positions
local v_scrolls = {}
local h_scrolls = {}
for _, view in ipairs(core.root_view.root_node:get_children()) do
local n = view:get_scrollable_size()
if n ~= math.huge and n > view.size.y then
v_scrolls[view] = view.scroll.y / (n - view.size.y)
end
local hn = view:get_h_scrollable_size()
if hn ~= math.huge and hn > view.size.x then
h_scrolls[view] = view.scroll.x / (hn - view.size.x)
end
end
local s = scale / current_scale
current_scale = scale
if config.plugins.scale.mode == "ui" then
SCALE = scale
style.padding.x = style.padding.x * s
style.padding.y = style.padding.y * s
style.divider_size = style.divider_size * s
style.scrollbar_size = style.scrollbar_size * s
style.expanded_scrollbar_size = style.expanded_scrollbar_size * s
style.caret_width = style.caret_width * s
style.tab_width = style.tab_width * s
for _, name in ipairs {"font", "big_font", "icon_font", "icon_big_font", "code_font"} do
style[name]:set_size(s * style[name]:get_size())
end
else
style.code_font:set_size(s * style.code_font:get_size())
end
for name, font in pairs(style.syntax_fonts) do
style.syntax_fonts[name]:set_size(s * font:get_size())
end
-- restore scroll positions
for view, n in pairs(v_scrolls) do
view.scroll.y = n * (view:get_scrollable_size() - view.size.y)
view.scroll.to.y = view.scroll.y
end
for view, hn in pairs(h_scrolls) do
view.scroll.x = hn * (view:get_h_scrollable_size() - view.size.x)
view.scroll.to.x = view.scroll.x
end
core.redraw = true
end
local function get_scale()
return current_scale
end
local function res_scale()
set_scale(default_scale)
end
local function inc_scale()
set_scale(current_scale + scale_steps)
end
local function dec_scale()
set_scale(current_scale - scale_steps)
end
if default_scale ~= config.plugins.scale.default_scale then
if type(config.plugins.scale.default_scale) == "number" then
set_scale(config.plugins.scale.default_scale)
end
end
-- The config specification used by gui generators
config.plugins.scale.config_spec = {
name = "Scale",
{
label = "Mode",
description = "The method used to apply the scaling.",
path = "mode",
type = "selection",
default = "code",
values = {
{"Everything", "ui"},
{"Code Only", "code"}
}
},
{
label = "Default Scale",
description = "The scaling factor applied to lite-xl.",
path = "default_scale",
type = "selection",
default = "autodetect",
values = {
{"Autodetect", "autodetect"},
{"80%", 0.80},
{"90%", 0.90},
{"100%", 1.00},
{"110%", 1.10},
{"120%", 1.20},
{"125%", 1.25},
{"130%", 1.30},
{"140%", 1.40},
{"150%", 1.50},
{"175%", 1.75},
{"200%", 2.00},
{"250%", 2.50},
{"300%", 3.00}
},
on_apply = function(value)
if type(value) == "string" then value = default_scale end
if value ~= current_scale then
set_scale(value)
end
end
},
{
label = "Use MouseWheel",
description = "Allow using CTRL + MouseWheel for changing the scale.",
path = "use_mousewheel",
type = "toggle",
default = true,
on_apply = function(enabled)
if enabled then
keymap.add {
["ctrl+wheelup"] = "scale:increase",
["ctrl+wheeldown"] = "scale:decrease"
}
else
keymap.unbind("ctrl+wheelup", "scale:increase")
keymap.unbind("ctrl+wheeldown", "scale:decrease")
end
end
}
}
command.add(nil, {
["scale:reset" ] = function() res_scale() end,
["scale:decrease"] = function() dec_scale() end,
["scale:increase"] = function() inc_scale() end,
})
keymap.add {
["ctrl+0"] = "scale:reset",
["ctrl+-"] = "scale:decrease",
["ctrl+="] = "scale:increase"
}
if config.plugins.scale.use_mousewheel then
keymap.add {
["ctrl+wheelup"] = "scale:increase",
["ctrl+wheeldown"] = "scale:decrease"
}
end
local old_DocView_on_context_menu = DocView.on_context_menu
function DocView:on_context_menu()
local args = { old_DocView_on_context_menu(self) }
local cmds = args[1]
table.move(cmds.items, 4, 6, 7)
cmds.items[4] = { text = "Font +", command = "scale:increase" }
cmds.items[5] = { text = "Font -", command = "scale:decrease" }
cmds.items[6] = { text = "Font Reset", command = "scale:reset" }
return table.unpack(args)
end
return {
["set"] = set_scale,
["get"] = get_scale,
["increase"] = inc_scale,
["decrease"] = dec_scale,
["reset"] = res_scale
}
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