查看“模块:Emoji”的源代码

local p = {}

p.data = require('Module:emoji/data')

function p.separateNameAndVar(nameWithVar)
    -- 接受两种格式来指定变种:
    -- {{e|名称/变种名}}
    -- {{e|名称|变种名}}
    nameWithVar = string.lower(nameWithVar)
    local varSepPosi = string.find(nameWithVar, '/')
    if varSepPosi ~= nil then
        var = string.sub(nameWithVar, varSepPosi + 1)
        name = string.sub(nameWithVar, 1, varSepPosi - 1)
        return name, var
    end
    return nameWithVar, nil
end

function p.getEmojiMeta(emojis, nameWithVar)
    -- 获取该名称 emoji 的元数据, 处理别名
    local name, var = p.separateNameAndVar(nameWithVar)

    local level = 0
    while true do
        if level == 10 then
            return 'emoji别名的嵌套级别超过10级, 放弃', false
        end
        level = level + 1

        emojiMetaOrAlias = emojis[name]
        if type(emojiMetaOrAlias) == 'table' then
            local emojiMeta = emojiMetaOrAlias
            if var ~= nil then
                return p.resolveVariety(emojiMeta, var)
            end
            return emojiMeta, true
        elseif emojiMetaOrAlias == nil then
            return 'emoji遗失, 名称: ' .. name, false
        elseif type(emojiMetaOrAlias) ~= 'string' then
            return 'emoji配置不正确, 类型: ' .. type(emojiMetaOrAlias), false
        end

        local alias = emojiMetaOrAlias
        newName, newVar = p.separateNameAndVar(alias)
        if newVar ~= nil and var ~= nil then
            return '在已解析到emoji变种名的情况下, 解析emoji别名时解析到了新的变种名, 旧: ' .. var .. '; 新: ' .. newVar, false
        elseif newVar ~= nil then
            var = newVar
        end
        name = newName
    end
end

function p.resolveVariety(meta, varietyName)
    -- 处理变种 (如果指定了)
    -- 变种暂时不支持别名 (懒)
    meta = (meta.varieties or {})[varietyName]
    if meta == nil then
        return 'emoji变种遗失, 变种名称: ' .. varietyName, false
    elseif type(meta) == 'string' then
        return 'emoji变种暂未支持别名', false
    elseif type(meta) ~= 'table' then
        return 'emoji变种配置不正确, 类型:' .. type(meta), false
    end
    return meta, true
end

function p.emoji()
    local frame = mw.getCurrentFrame():getParent()
    local name = mw.text.trim(frame.args[1])
    local var = frame.args[2]
    if var ~= nil then
        var = mw.text.trim(var)
    end

    if var ~= nil then
        name = name .. '/' .. var
    end

    local metaOrError, succ = p.getEmojiMeta(p.data.emojis, name)
    if not succ then
        return frame:expandTemplate {
            title = '？',
            args = {
                '[[help:emoji|❓]]',
                metaOrError,
            },
        }
    end
    local meta = metaOrError

    if type(meta.position) ~= 'table'
        or type(meta.position[1]) ~= 'number'
        or type(meta.position[2]) ~= 'number' 
    then
        return frame:expandTemplate {
            title = '？',
            args = {
                '[[help:emoji|❓]]',
                'emoji位置配置不正确',
            },
        }
    end

    local imageName = p.data.texture.image
    local row = meta.position[1]
    local col = meta.position[2]
    local width = p.data.texture.unitSize[1]
    local height = p.data.texture.unitSize[2]
    local y = row * height
    local x = col * width
    
    return frame:expandTemplate {
        title = 'image crop‎‎',
        args = {
            width = tostring(width) .. 'px',
            height = tostring(height) .. 'px',
            y = tostring(y) .. 'px',
            x = tostring(x) .. 'px',
            image = '[[File:' .. imageName .. '|link=' .. (frame.args['link'] or 'help:emoji') .. ']]',
        },
    }

end

return p