【界面UI】聊天表情混排：RichText图文混排与历史折叠

local EMOJI = { [1] = true, [2] = true, [3] = true, [4] = true }
local function toRich(text)
    local cnt = 0
    local s = string.gsub(text, "%[(%d)%]", function(id)
        if EMOJI[tonumber(id)] and cnt < 3 then
            cnt = cnt + 1
            return "<img src='res/chat/emoji/" .. id .. ".png' />"
        end
        return ""
    end)
    return s
end

local history = {}
SL:RegisterLuaNetMsg(7501, function(data)
    local rich = GUI:RichText_Create(chatLayer, "chat" .. os.clock(), 8, 0, toRich(data.text), 320, 16, { 230, 230, 230 }, 6, nil)
    table.insert(history, rich)
    if #history > 10 then
        local old = table.remove(history, 1)
        GUI:removeFromParent(old)
    end
end)