/
searchbar.tsx
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/
searchbar.tsx
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import { Component, Element, Event, EventEmitter, Prop, State, Watch } from '@stencil/core';
import { Color, InputChangeEvent, Mode } from '../../interface';
import { debounceEvent } from '../../utils/helpers';
import { createColorClasses } from '../../utils/theme';
@Component({
tag: 'ion-searchbar',
styleUrls: {
ios: 'searchbar.ios.scss',
md: 'searchbar.md.scss'
},
scoped: true
})
export class Searchbar {
private nativeInput!: HTMLInputElement;
private isCancelVisible = false;
private shouldAlignLeft = true;
@Element() el!: HTMLElement;
@Prop({ context: 'document' }) doc!: Document;
@State() focused = false;
/**
* The color to use from your application's color palette.
* Default options are: `"primary"`, `"secondary"`, `"tertiary"`, `"success"`, `"warning"`, `"danger"`, `"light"`, `"medium"`, and `"dark"`.
* For more information on colors, see [theming](/docs/theming/basics).
*/
@Prop() color?: Color;
/**
* The mode determines which platform styles to use.
* Possible values are: `"ios"` or `"md"`.
*/
@Prop() mode!: Mode;
/**
* If true, enable searchbar animation. Default `false`.
*/
@Prop() animated = false;
/**
* Set the input's autocomplete property. Values: `"on"`, `"off"`. Default `"off"`.
*/
@Prop() autocomplete = 'off';
/**
* Set the input's autocorrect property. Values: `"on"`, `"off"`. Default `"off"`.
*/
@Prop() autocorrect = 'off';
/**
* Set the cancel button icon. Only applies to `md` mode. Defaults to `"md-arrow-back"`.
*/
@Prop() cancelButtonIcon = 'md-arrow-back';
/**
* Set the the cancel button text. Only applies to `ios` mode. Default: `"Cancel"`.
*/
@Prop() cancelButtonText = 'Cancel';
/**
* Set the clear icon. Defaults to `"close-circle"` for `ios` and `"close"` for `md`.
*/
@Prop() clearIcon?: string;
/**
* Set the amount of time, in milliseconds, to wait to trigger the `ionChange` event after each keystroke. Default `250`.
*/
@Prop() debounce = 250;
@Watch('debounce')
protected debounceChanged() {
this.ionChange = debounceEvent(this.ionChange, this.debounce);
}
/**
* Set the input's placeholder. Default `"Search"`.
*/
@Prop() placeholder = 'Search';
/**
* The icon to use as the search icon. Defaults to `"search"`.
*/
@Prop() searchIcon?: string;
/**
* If true, show the cancel button. Default `false`.
*/
@Prop() showCancelButton = false;
/**
* If true, enable spellcheck on the input. Default `false`.
*/
@Prop() spellcheck = false;
/**
* Set the type of the input. Values: `"text"`, `"password"`, `"email"`, `"number"`, `"search"`, `"tel"`, `"url"`. Default `"search"`.
*/
@Prop() type = 'search';
/**
* the value of the searchbar.
*/
@Prop({ mutable: true }) value = '';
/**
* Emitted when a keyboard input ocurred.
*/
@Event() ionInput!: EventEmitter<KeyboardEvent>;
/**
* Emitted when the value has changed.
*/
@Event() ionChange!: EventEmitter<InputChangeEvent>;
/**
* Emitted when the cancel button is clicked.
*/
@Event() ionCancel!: EventEmitter<void>;
/**
* Emitted when the clear input button is clicked.
*/
@Event() ionClear!: EventEmitter<void>;
/**
* Emitted when the input loses focus.
*/
@Event() ionBlur!: EventEmitter<void>;
/**
* Emitted when the input has focus.
*/
@Event() ionFocus!: EventEmitter<void>;
@Watch('value')
protected valueChanged() {
const inputEl = this.nativeInput;
const value = this.value;
if (inputEl && inputEl.value !== value) {
inputEl.value = value;
}
this.ionChange.emit({ value });
}
componentDidLoad() {
this.positionElements();
this.debounceChanged();
}
/**
* Clears the input field and triggers the control change.
*/
private clearInput(ev?: Event) {
this.ionClear.emit();
if (ev) {
ev.preventDefault();
ev.stopPropagation();
}
// setTimeout() fixes https://github.com/ionic-team/ionic/issues/7527
// wait for 4 frames
setTimeout(() => {
const value = this.value;
if (value !== undefined && value !== '') {
this.value = '';
this.ionInput.emit();
}
}, 16 * 4);
}
/**
* Clears the input field and tells the input to blur since
* the clearInput function doesn't want the input to blur
* then calls the custom cancel function if the user passed one in.
*/
private cancelSearchbar() {
this.ionCancel.emit();
this.clearInput();
}
/**
* Update the Searchbar input value when the input changes
*/
private onInput(ev: KeyboardEvent) {
const input = ev.target as HTMLInputElement;
if (input) {
this.value = input.value;
}
this.ionInput.emit(ev);
}
/**
* Sets the Searchbar to not focused and checks if it should align left
* based on whether there is a value in the searchbar or not.
*/
private onBlur() {
this.focused = false;
this.ionBlur.emit();
this.positionElements();
}
/**
* Sets the Searchbar to focused and active on input focus.
*/
private onFocus() {
this.focused = true;
this.ionFocus.emit();
this.positionElements();
}
/**
* Positions the input search icon, placeholder, and the cancel button
* based on the input value and if it is focused. (ios only)
*/
private positionElements() {
const prevAlignLeft = this.shouldAlignLeft;
const shouldAlignLeft = (!this.animated || (this.value && this.value.toString().trim() !== '') || this.focused === true);
this.shouldAlignLeft = shouldAlignLeft;
if (this.mode !== 'ios') {
return;
}
if (prevAlignLeft !== shouldAlignLeft) {
this.positionPlaceholder();
}
if (this.animated) {
this.positionCancelButton();
}
}
/**
* Positions the input placeholder
*/
private positionPlaceholder() {
const isRTL = this.doc.dir === 'rtl';
const inputEl = this.nativeInput;
const iconEl = (this.el.shadowRoot || this.el).querySelector('.searchbar-search-icon') as HTMLElement;
if (this.shouldAlignLeft) {
inputEl.removeAttribute('style');
iconEl.removeAttribute('style');
} else {
// Create a dummy span to get the placeholder width
const doc = this.doc;
const tempSpan = doc.createElement('span');
tempSpan.innerHTML = this.placeholder;
doc.body.appendChild(tempSpan);
// Get the width of the span then remove it
const textWidth = tempSpan.offsetWidth;
tempSpan.remove();
// Calculate the input padding
const inputLeft = 'calc(50% - ' + (textWidth / 2) + 'px)';
// Calculate the icon margin
const iconLeft = 'calc(50% - ' + ((textWidth / 2) + 30) + 'px)';
// Set the input padding start and icon margin start
if (isRTL) {
inputEl.style.paddingRight = inputLeft;
iconEl.style.marginRight = iconLeft;
} else {
inputEl.style.paddingLeft = inputLeft;
iconEl.style.marginLeft = iconLeft;
}
}
}
/**
* Show the iOS Cancel button on focus, hide it offscreen otherwise
*/
private positionCancelButton() {
const isRTL = this.doc.dir === 'rtl';
const cancelButton = (this.el.shadowRoot || this.el).querySelector('.searchbar-cancel-button') as HTMLElement;
const shouldShowCancel = this.focused;
if (cancelButton && shouldShowCancel !== this.isCancelVisible) {
const cancelStyle = cancelButton.style;
this.isCancelVisible = shouldShowCancel;
if (shouldShowCancel) {
if (isRTL) {
cancelStyle.marginLeft = '0';
} else {
cancelStyle.marginRight = '0';
}
} else {
const offset = cancelButton.offsetWidth;
if (offset > 0) {
if (isRTL) {
cancelStyle.marginLeft = -offset + 'px';
} else {
cancelStyle.marginRight = -offset + 'px';
}
}
}
}
}
hostData() {
return {
class: {
...createColorClasses(this.color),
'searchbar-animated': this.animated,
'searchbar-has-value': (this.value !== ''),
'searchbar-show-cancel': this.showCancelButton,
'searchbar-left-aligned': this.shouldAlignLeft,
'searchbar-has-focus': this.focused
}
};
}
render() {
const clearIcon = this.clearIcon || (this.mode === 'ios' ? 'ios-close-circle' : 'md-close');
const searchIcon = this.searchIcon || 'search';
const cancelButton = (this.showCancelButton)
? <button
type="button"
tabIndex={this.mode === 'ios' && !this.focused ? -1 : undefined}
onClick={this.cancelSearchbar.bind(this)}
class="searchbar-cancel-button">
{ this.mode === 'md'
? <ion-icon mode={this.mode} icon={this.cancelButtonIcon}></ion-icon>
: this.cancelButtonText }
</button>
: null;
return [
<div class="searchbar-input-container">
{ this.mode === 'md' && cancelButton }
<ion-icon mode={this.mode} icon={searchIcon} class="searchbar-search-icon"></ion-icon>
<input
ref={(el) => this.nativeInput = el as HTMLInputElement}
class="searchbar-input"
onInput={this.onInput.bind(this)}
onBlur={this.onBlur.bind(this)}
onFocus={this.onFocus.bind(this)}
placeholder={this.placeholder}
type={this.type}
value={this.value}
autoComplete={this.autocomplete}
autoCorrect={this.autocorrect}
spellCheck={this.spellcheck}/>
<button
type="button"
no-blur={true}
class="searchbar-clear-button"
onClick={this.clearInput.bind(this)}
onMouseDown={this.clearInput.bind(this)}
onTouchStart={this.clearInput.bind(this)}>
<ion-icon mode={this.mode} icon={clearIcon} class="searchbar-clear-icon"></ion-icon>
</button>
</div>,
this.mode === 'ios' && cancelButton
];
}
}