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const telc = require('../../util/telchars')
const FocusElement = require('./FocusElement')
module.exports = class Form extends FocusElement {
constructor() {
super()
this.inputs = []
this.curIndex = 0
this.captureTab = true
}
addInput(input, asChild = true, opts = {}) {
// Adds the given input as a child element and pushes it to the input
// list. If the optional argument asChild is false, it won't add the
// input element as a child of the form.
this.inputs.push(input)
if (asChild) {
this.addChild(input, this.children.length, opts)
}
}
removeInput(input, asChild = true, opts = {}) {
// Removes the given input from the form's input list. If the optional
// argument asChild is false, it won't try to removeChild the input.
if (this.inputs.includes(input)) {
this.inputs.splice(this.inputs.indexOf(input), 1)
if (asChild) {
this.removeChild(input, opts)
}
}
}
selectInput(input) {
if (this.inputs.includes(input)) {
this.curIndex = this.inputs.indexOf(input)
this.updateSelectedElement()
}
}
keyPressed(keyBuf) {
// Don't do anything if captureTab is set to false. This is handy for
// nested forms.
if (!this.captureTab) {
return
}
if (telc.isTab(keyBuf) || telc.isBackTab(keyBuf)) {
// No inputs to tab through, so do nothing.
if (this.inputs.length < 2) {
return
}
if (telc.isTab(keyBuf)) {
this.nextInput()
} else {
this.previousInput()
}
return false
}
}
get selectable() {
return this.inputs.some(inp => inp.selectable)
}
updateSelectedElement() {
if (this.root.select && this.inputs.length) {
if (this.curIndex > this.inputs.length - 1) {
this.curIndex = this.inputs.length - 1
}
this.root.select(this.inputs[this.curIndex], {fromForm: true})
}
}
previousInput() {
if (this.inputs.length === 0) {
return
}
do {
this.curIndex = (this.curIndex - 1)
if (this.curIndex < 0) {
this.curIndex = (this.inputs.length - 1)
}
} while (!this.inputs[this.curIndex].selectable)
this.updateSelectedElement()
}
nextInput() {
if (this.inputs.length === 0) {
return
}
do {
this.curIndex = (this.curIndex + 1) % this.inputs.length
} while (!this.inputs[this.curIndex].selectable)
this.updateSelectedElement()
}
firstInput(selectForm = true) {
if (this.inputs.length === 0) {
return
}
this.curIndex = 0
if (!this.inputs[this.curIndex].selectable) {
this.nextInput()
}
if (selectForm || (
this.root.isChildOrSelfSelected && this.root.isChildOrSelfSelected(this)
)) {
this.updateSelectedElement()
}
}
lastInput(selectForm = true) {
if (this.inputs.length === 0) {
return
}
this.curIndex = this.inputs.length - 1
if (!this.inputs[this.curIndex].selectable) {
this.previousInput()
}
if (selectForm || (
this.root.isChildOrSelfSelected && this.root.isChildOrSelfSelected(this)
)) {
this.updateSelectedElement()
}
}
selected() {
if (this.root.selectedElement === this) {
this.updateSelectedElement()
}
}
get curIndex() { return this.getDep('curIndex') }
set curIndex(v) { return this.setDep('curIndex', v) }
}
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