【界面UI】图文混排：聊天里的道具链接与表情

---图文混排：标记解析为富文本段
function RichText.parse(text)
    local segments = {}
    local pos = 1
    while pos <= #text do
        local s, e = text:find('%[item:(%d+)%]', pos)
        if s then
            if s > pos then
                segments[#segments + 1] =
                    { type = 'text', content = text:sub(pos, s - 1) }
            end
            local itemId = tonumber(text:match('%[item:(%d+)%]', pos))
            segments[#segments + 1] =
                { type = 'item', id = itemId }
            pos = e + 1
        else
            segments[#segments + 1] =
                { type = 'text', content = text:sub(pos) }
            break
        end
    end
    return segments
end

---混排的渲染：文本与图标的混合
function RichText.render(win, segments)
    local x = 0
    for _, seg in ipairs(segments) do
        if seg.type == 'text' then
            local t = GUI:Text_Create(win, nil, x, 0,
                12, "#FFFFFF", seg.content)
            x = x + GUI:Text_GetWidth(t)
        elseif seg.type == 'item' then
            local icon = GUI:Image_Create(win, nil,
                x, -2, IconAtlas.get(Item.iconOf(seg.id)))
            GUI:addOnClickEvent(icon, function()
                ItemPopup.show(seg.id)
            end)
            x = x + 34
        end
    end
end