354 lines
10 KiB
Go
354 lines
10 KiB
Go
package libs
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import (
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"encoding/json"
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"errors"
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"fmt"
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"strconv"
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)
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// FieldMeta 保存每个字段对应的 mask 位和默认值（nil 表示无默认值）
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type FieldMeta struct {
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Bit uint32
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Default interface{}
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}
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// Selector 表示一个 UiSelector 的构造器
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type Selector struct {
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// 存放字段及其值（只包含显式设置的字段）
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fields map[string]interface{}
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// mask 值（通过设置/删除字段自动维护）
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mask uint32
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// childOrSibling 顺序列表，元素为 "child" 或 "sibling"
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childOrSibling []string
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// 对应的嵌套 Selector 列表，长度与 childOrSibling 相同
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childOrSiblingSelector []*Selector
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}
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// 字段元数据（与 Python 版本一致）
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var fieldDefs = map[string]FieldMeta{
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"text": {Bit: 0x01, Default: nil},
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"textContains": {Bit: 0x02, Default: nil},
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"textMatches": {Bit: 0x04, Default: nil},
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"textStartsWith": {Bit: 0x08, Default: nil},
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"className": {Bit: 0x10, Default: nil},
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"classNameMatches": {Bit: 0x20, Default: nil},
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"description": {Bit: 0x40, Default: nil},
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"descriptionContains": {Bit: 0x80, Default: nil},
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"descriptionMatches": {Bit: 0x0100, Default: nil},
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"descriptionStartsWith": {Bit: 0x0200, Default: nil},
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"checkable": {Bit: 0x0400, Default: false},
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"checked": {Bit: 0x0800, Default: false},
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"clickable": {Bit: 0x1000, Default: false},
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"longClickable": {Bit: 0x2000, Default: false},
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"scrollable": {Bit: 0x4000, Default: false},
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"enabled": {Bit: 0x8000, Default: false},
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"focusable": {Bit: 0x010000, Default: false},
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"focused": {Bit: 0x020000, Default: false},
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"selected": {Bit: 0x040000, Default: false},
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"packageName": {Bit: 0x080000, Default: nil},
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"packageNameMatches": {Bit: 0x100000, Default: nil},
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"resourceId": {Bit: 0x200000, Default: nil},
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"resourceIdMatches": {Bit: 0x400000, Default: nil},
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"index": {Bit: 0x800000, Default: 0},
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"instance": {Bit: 0x01000000, Default: 0},
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}
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// New creates a Selector and可选传入初始字段
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func New(initial map[string]interface{}) (*Selector, error) {
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s := &Selector{
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fields: make(map[string]interface{}),
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childOrSibling: []string{},
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childOrSiblingSelector: []*Selector{},
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mask: 0,
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}
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for k, v := range initial {
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if err := s.Set(k, v); err != nil {
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return nil, err
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}
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}
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return s, nil
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}
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// MustNew 跟 New 相同，但在错误时 panic，便于简洁示例
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func MustNew(initial map[string]interface{}) *Selector {
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s, err := New(initial)
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if err != nil {
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panic(err)
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}
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return s
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}
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// validateValue 对给定字段和值做类型校验（布尔字段与整数字段）
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func validateValue(key string, val interface{}) error {
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meta, ok := fieldDefs[key]
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if !ok {
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return fmt.Errorf("field %s is not allowed", key)
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}
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if meta.Default == false {
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// 期望 bool
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_, ok := val.(bool)
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if !ok {
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return fmt.Errorf("%s must be bool", key)
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}
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return nil
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}
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// 对整数字段（Default 为 int 类型）要求 int
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switch d := meta.Default.(type) {
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case int:
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// 支持 int 和可被转为 int 的数值（如 int64）
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switch val.(type) {
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case int, int8, int16, int32, int64:
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return nil
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case uint, uint8, uint16, uint32, uint64:
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return nil
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default:
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return fmt.Errorf("%s must be integer type, default=%v", key, d)
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}
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default:
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// 其它字段没有特别要求
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return nil
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}
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}
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// Set 设置字段并更新 mask；若字段非法或类型不对则返回错误
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func (s *Selector) Set(key string, val interface{}) error {
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if _, ok := fieldDefs[key]; !ok {
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return fmt.Errorf("%s is not allowed", key)
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}
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if err := validateValue(key, val); err != nil {
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return err
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}
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s.fields[key] = val
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s.mask = s.mask | fieldDefs[key].Bit
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return nil
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}
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// Delete 删除字段并更新 mask；幂等（删除不存在字段不报错）
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func (s *Selector) Delete(key string) error {
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if _, ok := fieldDefs[key]; !ok {
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return fmt.Errorf("%s is not allowed", key)
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}
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if _, present := s.fields[key]; present {
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delete(s.fields, key)
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s.mask = s.mask & ^fieldDefs[key].Bit
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}
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return nil
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}
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// Mask 返回当前 mask（只读）
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func (s *Selector) Mask() uint32 {
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return s.mask
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}
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// Child 在末尾添加 child
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func (s *Selector) Child(initial map[string]interface{}) (*Selector, error) {
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child, err := New(initial)
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if err != nil {
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return nil, err
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}
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s.childOrSibling = append(s.childOrSibling, "child")
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s.childOrSiblingSelector = append(s.childOrSiblingSelector, child)
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return s, nil
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}
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// Sibling 在末尾添加 sibling
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func (s *Selector) Sibling(initial map[string]interface{}) (*Selector, error) {
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child, err := New(initial)
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if err != nil {
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return nil, err
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}
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s.childOrSibling = append(s.childOrSibling, "sibling")
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s.childOrSiblingSelector = append(s.childOrSiblingSelector, child)
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return s, nil
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}
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// UpdateInstance 更新最后一个 childOrSiblingSelector 的 instance 字段（或根 selector）
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func (s *Selector) UpdateInstance(i int) error {
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n := len(s.childOrSiblingSelector)
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if n > 0 {
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return s.childOrSiblingSelector[n-1].Set("instance", i)
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}
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return s.Set("instance", i)
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}
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// Clone 深拷贝 Selector，包括子/兄弟
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func (s *Selector) Clone() *Selector {
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clone := &Selector{
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fields: make(map[string]interface{}, len(s.fields)),
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mask: s.mask,
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childOrSibling: append([]string{}, s.childOrSibling...),
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childOrSiblingSelector: make([]*Selector, 0, len(s.childOrSiblingSelector)),
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}
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for k, v := range s.fields {
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// 简单深拷贝：对于常见类型（string,bool,int）直接赋值即可。
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// 若值为复杂结构，调用方应使用 ToMap/ToJSON 再 Parse 得到深拷贝。
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clone.fields[k] = v
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}
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for _, c := range s.childOrSiblingSelector {
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clone.childOrSiblingSelector = append(clone.childOrSiblingSelector, c.Clone())
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}
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return clone
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}
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// ToMap 序列化为 map，便于 RPC 调用或 JSON 编码
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func (s *Selector) ToMap() map[string]interface{} {
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out := make(map[string]interface{}, len(s.fields)+3)
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for k, v := range s.fields {
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out[k] = v
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}
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out["mask"] = s.mask
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if len(s.childOrSibling) > 0 {
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out["childOrSibling"] = append([]string{}, s.childOrSibling...)
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cs := make([]map[string]interface{}, 0, len(s.childOrSiblingSelector))
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for _, c := range s.childOrSiblingSelector {
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cs = append(cs, c.ToMap())
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}
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out["childOrSiblingSelector"] = cs
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}
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return out
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}
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// ToJSON 返回 ToMap 的 JSON 编码
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func (s *Selector) ToJSON() ([]byte, error) {
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return json.Marshal(s.ToMap())
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}
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// FromMap 从 map 恢复 Selector（简单实现，忽略非法字段）
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func FromMap(data map[string]interface{}) (*Selector, error) {
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// 提取根字段
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root := &Selector{
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fields: make(map[string]interface{}),
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childOrSibling: []string{},
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childOrSiblingSelector: []*Selector{},
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mask: 0,
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}
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// 读取已知字段
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for k, meta := range fieldDefs {
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if v, ok := data[k]; ok {
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// 尝试 Set 以做类型校验并设置 mask
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if err := root.Set(k, v); err != nil {
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return nil, err
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}
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// 注意：Set 已经更新了 mask
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_ = meta
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}
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}
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// 恢复 mask（如果提供了 mask，并且为数值）
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if m, ok := data["mask"]; ok {
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switch mv := m.(type) {
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case float64:
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root.mask = uint32(mv)
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case uint32:
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root.mask = mv
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case int:
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root.mask = uint32(mv)
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case int64:
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root.mask = uint32(mv)
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default:
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// 忽略不能解析的 mask
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}
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}
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// 恢复 childOrSibling 列表和对应 selector（期望 childOrSiblingSelector 为 []map[string]interface{}）
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if cs, ok := data["childOrSibling"]; ok {
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if arr, ok := cs.([]interface{}); ok {
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for _, e := range arr {
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if sname, ok := e.(string); ok {
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root.childOrSibling = append(root.childOrSibling, sname)
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}
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}
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}
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}
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if css, ok := data["childOrSiblingSelector"]; ok {
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if arr, ok := css.([]interface{}); ok {
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for _, item := range arr {
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if m, ok := item.(map[string]interface{}); ok {
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c, err := FromMap(m)
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if err != nil {
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return nil, err
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}
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root.childOrSiblingSelector = append(root.childOrSiblingSelector, c)
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}
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}
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}
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}
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return root, nil
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}
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// UpdateAtPath 在指定路径（child 索引链）上更新字段
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// path: 逐级索引，例如 [0,2] 表示 childOrSiblingSelector[0].childOrSiblingSelector[2]
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func (s *Selector) UpdateAtPath(path []int, updates map[string]interface{}) error {
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node := s
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for _, idx := range path {
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if idx < 0 || idx >= len(node.childOrSiblingSelector) {
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return errors.New("path out of range")
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}
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node = node.childOrSiblingSelector[idx]
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}
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for k, v := range updates {
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if err := node.Set(k, v); err != nil {
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return err
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}
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}
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return nil
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}
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// String 实现 fmt.Stringer，输出友好可读的 Selector 表示（类似 Python 的 __str__）
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func (s *Selector) String() string {
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m := s.ToMap()
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// 删除空的 childOrSibling 字段以保持简洁
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if _, ok := m["childOrSibling"]; !ok {
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delete(m, "childOrSibling")
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delete(m, "childOrSiblingSelector")
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}
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b, _ := json.Marshal(m)
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return "Selector " + string(b)
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}
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// Example 用法示例（不是正式测试，仅供快速手动运行）
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func Example() {
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// 初始化根 selector
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root := MustNew(map[string]interface{}{
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"className": "android.widget.LinearLayout",
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})
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// 添加 child
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root.Child(map[string]interface{}{
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"text": "下一步",
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"instance": 0,
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})
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// 更新最后一个 child 的 instance
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_ = root.UpdateInstance(2)
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// 深拷贝
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cpy := root.Clone()
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// 序列化到 JSON
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j, _ := cpy.ToJSON()
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fmt.Println(string(j))
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}
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// 简单测试函数（你可在 package 内使用 testing 包将其改写成真正的单元测试）
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func SimpleTests() {
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// set & delete
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s := MustNew(map[string]interface{}{"text": "hello"})
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fmt.Println("mask after set:", strconv.FormatUint(uint64(s.Mask()), 10))
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_ = s.Delete("text")
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fmt.Println("mask after delete:", strconv.FormatUint(uint64(s.Mask()), 10))
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// bool 类型校验
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_, err := New(map[string]interface{}{"checkable": "yes"})
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fmt.Println("expected error for bad bool:", err != nil)
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// clone 深拷贝检查
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s2 := MustNew(map[string]interface{}{"text": "a"})
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s2.Child(map[string]interface{}{"text": "b", "instance": 1})
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c := s2.Clone()
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c.childOrSibling[0] = "sibling"
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fmt.Println("original childOrSibling:", s2.childOrSibling[0], "clone childOrSibling:", c.childOrSibling[0])
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}
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