- src: https://img.moegirl.org.cn/common/a/a9/Example.jpg
Parser function
Template with parser function
Tag extension <img>
[无效图片]
<img src="{{filepath:Example.jpg}}" width="200">
Template with tag extension
Lua
- extensionTag
- callParserFunction
- printTag
<img src="" />
- preprocessTag
- printFunction
{{#img:|src=https://img.moegirl.org.cn/common/a/a9/Example.jpg}}
- preprocessFunction
local p = {}
function p.extractAttrsFromFrame(frame)
local args = frame.args
local attrs = {}
local validKeys = {
'src', 'file', 'alt', 'width', 'height', 'class', 'style', 'title', 'loading',
}
-- 遍历 args，提取有效的属性
for key, value in pairs(args) do
if value ~= '' and value ~= nil then
-- 检查 key 是否在有效的属性列表中
local isValid = false
for _, validKey in ipairs(validKeys) do
if key == validKey then
isValid = true
break
end
end
if isValid then
-- 如果是有效的属性，则添加到 attrs 中
attrs[key] = value
end
end
end
-- 如果有 file，将 src 替换为文件链接
if attrs.file and attrs.file ~= '' then
-- 使用 frame 的 callParserFunction 方法获取文件链接
attrs.src = frame:callParserFunction('filepath', { attrs.file })
-- 删除 file 属性，因为已经用 src 替换了
attrs.file = nil
end
-- 替换 src 中可能存在的特殊字符
if attrs.src then
attrs.src = string.gsub(attrs.src, '://', '://')
end
return attrs
end
function p.extensionTag(frame)
local attrs = p.extractAttrsFromFrame(frame)
return frame:extensionTag('img', '', attrs)
end
function p.callParserFunction(frame)
local attrs = p.extractAttrsFromFrame(frame)
if attrs.src ~= nil and attrs.src ~= '' then
attrs[1] = attrs.src
attrs.src = nil
end
return frame:callParserFunction('#img', attrs)
end
function p.printTag(frame)
local attrs = p.extractAttrsFromFrame(frame)
local attrStr = ''
for key, value in pairs(attrs) do
if value ~= nil and value ~= '' then
local strippedValue = string.gsub(value, '"', '"') -- 转义双引号
attrStr = attrStr .. key .. '="' .. strippedValue .. '" '
end
end
return '<img ' .. attrStr .. '/>'
end
function p.preprocessTag(frame)
local str = p.printTag(frame)
return frame:preprocess(str)
end
function p.printFunction(frame)
local attrs = p.extractAttrsFromFrame(frame)
local attrStr = ''
for key, value in pairs(attrs) do
if value ~= nil and value ~= '' then
-- 转义等号和竖线
local strippedValue = string.gsub(value, '[=|]', function(c)
return (c == '=') and '=' or '|'
end)
attrStr = attrStr .. key .. '=' .. strippedValue
end
end
return '{{#img:|' .. attrStr .. '}}'
end
function p.preprocessFunction(frame)
local str = p.printFunction(frame)
return frame:preprocess(str)
end
return p