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edit-menu.go
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edit-menu.go
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// Copyright (c) 2023 The Go-Enjin Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package menu
import (
"encoding/json"
"github.com/go-corelibs/slices"
)
type EditMenu []*EditItem
func NewEditMenuFromJson(data []byte) (menu EditMenu, err error) {
if err = json.Unmarshal(data, &menu); err != nil {
return
}
return
}
func (m EditMenu) Len() (size int) {
size = len(m)
return
}
func (m EditMenu) String() (value string) {
if data, err := json.MarshalIndent(m, "", "\t"); err == nil {
value = string(data)
}
return
}
func (m EditMenu) AsMenu() (clone Menu) {
for _, item := range m {
clone = append(clone, item.AsItem())
}
return
}
func (m EditMenu) ExpandAll() {
for _, item := range m {
item.Expand = "true"
item.SubMenu.ExpandAll()
}
}
func (m EditMenu) CollapseAll() {
for _, item := range m {
item.Expand = ""
item.SubMenu.CollapseAll()
}
}
func (m EditMenu) SanitizeAll() {
SanitizeMenu(m)
}
func (m EditMenu) ProcessAllChanges() (modified EditMenu) {
var changed bool
for modified, changed = m.ProcessChanges(); changed; modified, changed = modified.ProcessChanges() {
// nop
}
return
}
func (m EditMenu) ProcessChanges() (modified EditMenu, changed bool) {
var process func(list EditMenu, top bool) (spill *EditItem, forward bool, modified EditMenu, changed bool)
process = func(list EditMenu, top bool) (spill *EditItem, forward bool, modified EditMenu, changed bool) {
if last := len(list) - 1; last > -1 {
// depth first
for idx, item := range list {
var s *EditItem
var fwd bool
if s, fwd, item.SubMenu, changed = process(item.SubMenu, false); s != nil {
if fwd {
if idx < last {
// push after this
modified = append(modified, item, s)
}
} else {
if idx > 0 {
// push before this
modified = append(modified, s, item)
}
}
} else {
modified = append(modified, item)
}
}
// then this
last = len(modified) - 1 // revised last index
for idx, item := range append(EditMenu{}, modified...) {
if changed = item.MoveUp; changed {
item.MoveUp = false
modified = slices.Remove(modified, idx)
if idx == 0 {
if !top {
spill = item
forward = false
}
} else {
modified = slices.Insert(modified, idx-1, item)
}
return
} else if changed = item.MoveDown; changed {
item.MoveDown = false
modified = slices.Remove(modified, idx)
if idx == last {
if !top {
spill = item
forward = true
}
} else {
modified = slices.Insert(modified, idx+1, item)
}
return
} else if changed = item.Append; changed {
item.Append = false
item.SubMenu = append(item.SubMenu, &EditItem{})
return
} else if changed = item.Delete; changed {
item.Delete = false
modified = slices.Remove(modified, idx)
return
}
}
}
return
}
_, _, modified, changed = process(m, true)
return
}