mapcomplete/UI/Input/TextField.ts
2020-10-17 03:19:14 +02:00

161 lines
No EOL
5.6 KiB
TypeScript

import {UIElement} from "../UIElement";
import {InputElement} from "./InputElement";
import Translations from "../i18n/Translations";
import {UIEventSource} from "../../Logic/UIEventSource";
import Combine from "../Base/Combine";
export class TextField extends InputElement<string> {
private readonly value: UIEventSource<string>;
public readonly enterPressed = new UIEventSource<string>(undefined);
private readonly _placeholder: UIElement;
public readonly IsSelected: UIEventSource<boolean> = new UIEventSource<boolean>(false);
private readonly _htmlType: string;
private readonly _textAreaRows: number;
private readonly _isValid: (string, country) => boolean;
private _label: UIElement;
constructor(options?: {
placeholder?: string | UIElement,
value?: UIEventSource<string>,
textArea?: boolean,
htmlType?: string,
label?: UIElement,
textAreaRows?: number,
isValid?: ((s: string, country?: string) => boolean)
}) {
super(undefined);
const self = this;
this.value = new UIEventSource<string>("");
options = options ?? {};
this._htmlType = options.textArea ? "area" : (options.htmlType ?? "text");
this.value = options?.value ?? new UIEventSource<string>(undefined);
this._label = options.label;
this._textAreaRows = options.textAreaRows;
this._isValid = options.isValid ?? ((str, country) => true);
this._placeholder = Translations.W(options.placeholder ?? "");
this.ListenTo(this._placeholder._source);
this.onClick(() => {
self.IsSelected.setData(true)
});
this.value.addCallback((t) => {
const field = document.getElementById("txt-"+this.id);
if (field === undefined || field === null) {
return;
}
field.className = self.IsValid(t) ? "" : "invalid";
if (t === undefined || t === null) {
return;
}
// @ts-ignore
field.value = t;
});
this.dumbMode = false;
}
GetValue(): UIEventSource<string> {
return this.value;
}
InnerRender(): string {
if (this._htmlType === "area") {
return `<span id="${this.id}"><textarea id="txt-${this.id}" class="form-text-field" rows="${this._textAreaRows}" cols="50" style="max-width: 100%; width: 100%; box-sizing: border-box"></textarea></span>`
}
const placeholder = this._placeholder.InnerRender().replace("'", "&#39");
let label = "";
if (this._label != undefined) {
label = this._label.Render();
}
return new Combine([
`<span id="${this.id}">`,
`<form onSubmit='return false' class='form-text-field'>`,
label,
`<input type='${this._htmlType}' placeholder='${placeholder}' id='txt-${this.id}'/>`,
`</form>`,
`</span>`
]).Render();
}
InnerUpdate() {
const field = document.getElementById("txt-" + this.id);
const self = this;
field.oninput = () => {
// How much characters are on the right, not including spaces?
// @ts-ignore
const endDistance = field.value.substring(field.selectionEnd).replace(/ /g,'').length;
// @ts-ignore
let val: string = field.value;
if (!self.IsValid(val)) {
self.value.setData(undefined);
} else {
self.value.setData(val);
}
// Setting the value might cause the value to be set again. We keep the distance _to the end_ stable, as phone number formatting might cause the start to change
// See https://github.com/pietervdvn/MapComplete/issues/103
// We reread the field value - it might have changed!
// @ts-ignore
val = field.value;
let newCursorPos = val.length - endDistance;
while(newCursorPos >= 0 &&
// We count the number of _actual_ characters (non-space characters) on the right of the new value
// This count should become bigger then the end distance
val.substr(newCursorPos).replace(/ /g, '').length < endDistance
){
newCursorPos --;
}
// @ts-ignore
self.SetCursorPosition(newCursorPos);
};
if (this.value.data !== undefined && this.value.data !== null) {
// @ts-ignore
field.value = this.value.data;
}
field.addEventListener("focusin", () => self.IsSelected.setData(true));
field.addEventListener("focusout", () => self.IsSelected.setData(false));
field.addEventListener("keyup", function (event) {
if (event.key === "Enter") {
// @ts-ignore
self.enterPressed.setData(field.value);
}
});
}
public SetCursorPosition(i: number) {
if(this._htmlType !== "text" && this._htmlType !== "area"){
return;
}
const field = document.getElementById('txt-' + this.id);
if(field === undefined || field === null){
return;
}
if (i === -1) {
// @ts-ignore
i = field.value.length;
}
field.focus();
// @ts-ignore
field.setSelectionRange(i, i);
}
IsValid(t: string): boolean {
if (t === undefined || t === null) {
return false
}
return this._isValid(t, undefined);
}
}