forked from mbk-lab/rui_orig
462 lines
10 KiB
Go
462 lines
10 KiB
Go
package rui
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// DropDownEvent is the constant for "drop-down-event" property tag.
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// The "drop-down-event" event occurs when a list item becomes selected.
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// The main listener format: func(DropDownList, int), where the second argument is the item index.
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const DropDownEvent = "drop-down-event"
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// DropDownList - the interface of a drop-down list view
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type DropDownList interface {
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View
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getItems() []string
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}
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type dropDownListData struct {
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viewData
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items []string
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disabledItems []any
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dropDownListener []func(DropDownList, int)
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}
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// NewDropDownList create new DropDownList object and return it
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func NewDropDownList(session Session, params Params) DropDownList {
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view := new(dropDownListData)
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view.init(session)
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setInitParams(view, params)
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return view
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}
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func newDropDownList(session Session) View {
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return NewDropDownList(session, nil)
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}
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func (list *dropDownListData) init(session Session) {
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list.viewData.init(session)
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list.tag = "DropDownList"
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list.items = []string{}
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list.disabledItems = []any{}
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list.dropDownListener = []func(DropDownList, int){}
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}
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func (list *dropDownListData) String() string {
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return getViewString(list)
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}
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func (list *dropDownListData) Focusable() bool {
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return true
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}
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func (list *dropDownListData) Remove(tag string) {
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list.remove(strings.ToLower(tag))
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}
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func (list *dropDownListData) remove(tag string) {
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switch tag {
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case Items:
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if len(list.items) > 0 {
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list.items = []string{}
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if list.created {
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updateInnerHTML(list.htmlID(), list.session)
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}
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list.propertyChangedEvent(tag)
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}
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case DisabledItems:
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if len(list.disabledItems) > 0 {
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list.disabledItems = []any{}
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if list.created {
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updateInnerHTML(list.htmlID(), list.session)
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}
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list.propertyChangedEvent(tag)
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}
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case DropDownEvent:
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if len(list.dropDownListener) > 0 {
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list.dropDownListener = []func(DropDownList, int){}
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list.propertyChangedEvent(tag)
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}
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case Current:
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oldCurrent := GetCurrent(list)
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delete(list.properties, Current)
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if oldCurrent != 0 {
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if list.created {
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list.session.callFunc("selectDropDownListItem", list.htmlID(), 0)
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}
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list.onSelectedItemChanged(0)
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}
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default:
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list.viewData.remove(tag)
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return
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}
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}
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func (list *dropDownListData) Set(tag string, value any) bool {
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return list.set(strings.ToLower(tag), value)
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}
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func (list *dropDownListData) set(tag string, value any) bool {
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if value == nil {
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list.remove(tag)
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return true
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}
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switch tag {
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case Items:
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return list.setItems(value)
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case DisabledItems:
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return list.setDisabledItems(value)
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case DropDownEvent:
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listeners, ok := valueToEventListeners[DropDownList, int](value)
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if !ok {
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notCompatibleType(tag, value)
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return false
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} else if listeners == nil {
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listeners = []func(DropDownList, int){}
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}
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list.dropDownListener = listeners
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list.propertyChangedEvent(tag)
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return true
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case Current:
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oldCurrent := GetCurrent(list)
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if !list.setIntProperty(Current, value) {
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return false
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}
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if current := GetCurrent(list); oldCurrent != current {
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if list.created {
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list.session.callFunc("selectDropDownListItem", list.htmlID(), current)
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}
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list.onSelectedItemChanged(current)
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}
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return true
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}
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return list.viewData.set(tag, value)
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}
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func (list *dropDownListData) setItems(value any) bool {
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switch value := value.(type) {
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case string:
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list.items = []string{value}
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case []string:
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list.items = value
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case []DataValue:
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list.items = make([]string, 0, len(value))
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for _, val := range value {
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if !val.IsObject() {
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list.items = append(list.items, val.Value())
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}
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}
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case []fmt.Stringer:
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list.items = make([]string, len(value))
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for i, str := range value {
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list.items[i] = str.String()
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}
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case []any:
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items := make([]string, 0, len(value))
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for _, v := range value {
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switch val := v.(type) {
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case string:
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items = append(items, val)
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case fmt.Stringer:
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items = append(items, val.String())
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case bool:
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if val {
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items = append(items, "true")
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} else {
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items = append(items, "false")
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}
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case float32:
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items = append(items, fmt.Sprintf("%g", float64(val)))
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case float64:
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items = append(items, fmt.Sprintf("%g", val))
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case rune:
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items = append(items, string(val))
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default:
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if n, ok := isInt(v); ok {
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items = append(items, strconv.Itoa(n))
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} else {
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notCompatibleType(Items, value)
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return false
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}
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}
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}
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list.items = items
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default:
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notCompatibleType(Items, value)
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return false
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}
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if list.created {
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updateInnerHTML(list.htmlID(), list.session)
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}
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list.propertyChangedEvent(Items)
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return true
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}
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func (list *dropDownListData) setDisabledItems(value any) bool {
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switch value := value.(type) {
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case []int:
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list.disabledItems = make([]any, len(value))
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for i, n := range value {
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list.disabledItems[i] = n
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}
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case []any:
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disabledItems := make([]any, len(value))
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for i, val := range value {
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if val == nil {
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notCompatibleType(DisabledItems, value)
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return false
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}
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switch val := val.(type) {
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case string:
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if isConstantName(val) {
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disabledItems[i] = val
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} else {
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n, err := strconv.Atoi(val)
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if err != nil {
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notCompatibleType(DisabledItems, value)
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return false
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}
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disabledItems[i] = n
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}
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default:
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if n, ok := isInt(val); ok {
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disabledItems[i] = n
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} else {
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notCompatibleType(DisabledItems, value)
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return false
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}
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}
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}
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list.disabledItems = disabledItems
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case string:
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values := strings.Split(value, ",")
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disabledItems := make([]any, len(values))
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for i, str := range values {
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str = strings.Trim(str, " ")
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if str == "" {
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notCompatibleType(DisabledItems, value)
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return false
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}
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if isConstantName(str) {
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disabledItems[i] = str
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} else {
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n, err := strconv.Atoi(str)
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if err != nil {
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notCompatibleType(DisabledItems, value)
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return false
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}
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disabledItems[i] = n
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}
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}
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list.disabledItems = disabledItems
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case []DataValue:
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disabledItems := make([]string, 0, len(value))
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for _, val := range value {
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if !val.IsObject() {
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disabledItems = append(disabledItems, val.Value())
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}
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}
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return list.setDisabledItems(disabledItems)
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default:
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notCompatibleType(DisabledItems, value)
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return false
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}
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if list.created {
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updateInnerHTML(list.htmlID(), list.session)
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}
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list.propertyChangedEvent(Items)
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return true
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}
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func (list *dropDownListData) Get(tag string) any {
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return list.get(strings.ToLower(tag))
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}
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func (list *dropDownListData) get(tag string) any {
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switch tag {
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case Items:
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return list.items
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case DisabledItems:
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return list.disabledItems
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case Current:
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result, _ := intProperty(list, Current, list.session, 0)
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return result
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case DropDownEvent:
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return list.dropDownListener
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}
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return list.viewData.get(tag)
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}
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func (list *dropDownListData) getItems() []string {
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return list.items
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}
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func (list *dropDownListData) htmlTag() string {
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return "select"
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}
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func (list *dropDownListData) htmlSubviews(self View, buffer *strings.Builder) {
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if list.items != nil {
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current := GetCurrent(list)
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notTranslate := GetNotTranslate(list)
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disabledItems := GetDropDownDisabledItems(list)
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for i, item := range list.items {
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disabled := false
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for _, index := range disabledItems {
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if i == index {
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disabled = true
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break
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}
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}
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if disabled {
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buffer.WriteString("<option disabled>")
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} else if i == current {
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buffer.WriteString("<option selected>")
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} else {
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buffer.WriteString("<option>")
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}
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if !notTranslate {
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item, _ = list.session.GetString(item)
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}
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buffer.WriteString(item)
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buffer.WriteString("</option>")
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}
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}
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}
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func (list *dropDownListData) htmlProperties(self View, buffer *strings.Builder) {
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list.viewData.htmlProperties(self, buffer)
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buffer.WriteString(` size="1" onchange="dropDownListEvent(this, event)"`)
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}
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func (list *dropDownListData) htmlDisabledProperties(self View, buffer *strings.Builder) {
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list.viewData.htmlDisabledProperties(self, buffer)
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if IsDisabled(list) {
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buffer.WriteString(`disabled`)
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}
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}
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func (list *dropDownListData) onSelectedItemChanged(number int) {
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for _, listener := range list.dropDownListener {
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listener(list, number)
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}
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list.propertyChangedEvent(Current)
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}
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func (list *dropDownListData) handleCommand(self View, command string, data DataObject) bool {
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switch command {
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case "itemSelected":
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if text, ok := data.PropertyValue("number"); ok {
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if number, err := strconv.Atoi(text); err == nil {
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if GetCurrent(list) != number && number >= 0 && number < len(list.items) {
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list.properties[Current] = number
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list.onSelectedItemChanged(number)
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}
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} else {
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ErrorLog(err.Error())
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}
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}
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default:
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return list.viewData.handleCommand(self, command, data)
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}
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return true
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}
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// GetDropDownListeners returns the "drop-down-event" listener list. If there are no listeners then the empty list is returned.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetDropDownListeners(view View, subviewID ...string) []func(DropDownList, int) {
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return getEventListeners[DropDownList, int](view, subviewID, DropDownEvent)
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}
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// GetDropDownItems return the DropDownList items list.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetDropDownItems(view View, subviewID ...string) []string {
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if len(subviewID) > 0 && subviewID[0] != "" {
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view = ViewByID(view, subviewID[0])
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}
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if view != nil {
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if list, ok := view.(DropDownList); ok {
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return list.getItems()
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}
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}
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return []string{}
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}
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// GetDropDownDisabledItems return the list of DropDownList disabled item indexes.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetDropDownDisabledItems(view View, subviewID ...string) []int {
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if len(subviewID) > 0 && subviewID[0] != "" {
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view = ViewByID(view, subviewID[0])
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}
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if view != nil {
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if value := view.Get(DisabledItems); value != nil {
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if values, ok := value.([]any); ok {
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count := len(values)
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if count > 0 {
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result := make([]int, 0, count)
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for _, value := range values {
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switch value := value.(type) {
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case int:
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result = append(result, value)
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case string:
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if value != "" && value[0] == '@' {
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if val, ok := view.Session().Constant(value[1:]); ok {
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if n, err := strconv.Atoi(val); err == nil {
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result = append(result, n)
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}
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}
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}
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}
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}
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return result
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}
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}
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}
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}
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return []int{}
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}
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