287 lines
8.1 KiB
JavaScript
287 lines
8.1 KiB
JavaScript
/**
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* @license
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* Copyright 2015 Google Inc. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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(function() {
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'use strict';
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/**
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* Class constructor for Textfield MDL component.
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* Implements MDL component design pattern defined at:
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* https://github.com/jasonmayes/mdl-component-design-pattern
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*
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* @constructor
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* @param {HTMLElement} element The element that will be upgraded.
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*/
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var MaterialTextfield = function MaterialTextfield(element) {
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this.element_ = element;
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this.maxRows = this.Constant_.NO_MAX_ROWS;
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// Initialize instance.
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this.init();
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};
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window['MaterialTextfield'] = MaterialTextfield;
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/**
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* Store constants in one place so they can be updated easily.
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*
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* @enum {string | number}
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* @private
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*/
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MaterialTextfield.prototype.Constant_ = {
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NO_MAX_ROWS: -1,
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MAX_ROWS_ATTRIBUTE: 'maxrows'
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};
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/**
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* Store strings for class names defined by this component that are used in
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* JavaScript. This allows us to simply change it in one place should we
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* decide to modify at a later date.
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*
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* @enum {string}
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* @private
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*/
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MaterialTextfield.prototype.CssClasses_ = {
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LABEL: 'mdl-textfield__label',
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INPUT: 'mdl-textfield__input',
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IS_DIRTY: 'is-dirty',
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IS_FOCUSED: 'is-focused',
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IS_DISABLED: 'is-disabled',
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IS_INVALID: 'is-invalid',
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IS_UPGRADED: 'is-upgraded',
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HAS_PLACEHOLDER: 'has-placeholder'
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};
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/**
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* Handle input being entered.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialTextfield.prototype.onKeyDown_ = function(event) {
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var currentRowCount = event.target.value.split('\n').length;
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if (event.keyCode === 13) {
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if (currentRowCount >= this.maxRows) {
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event.preventDefault();
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}
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}
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};
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/**
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* Handle focus.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialTextfield.prototype.onFocus_ = function(event) {
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this.element_.classList.add(this.CssClasses_.IS_FOCUSED);
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};
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/**
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* Handle lost focus.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialTextfield.prototype.onBlur_ = function(event) {
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this.element_.classList.remove(this.CssClasses_.IS_FOCUSED);
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};
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/**
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* Handle reset event from out side.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialTextfield.prototype.onReset_ = function(event) {
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this.updateClasses_();
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};
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/**
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* Handle class updates.
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*
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* @private
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*/
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MaterialTextfield.prototype.updateClasses_ = function() {
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this.checkDisabled();
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this.checkValidity();
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this.checkDirty();
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this.checkFocus();
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};
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// Public methods.
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/**
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* Check the disabled state and update field accordingly.
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*
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* @public
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*/
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MaterialTextfield.prototype.checkDisabled = function() {
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if (this.input_.disabled) {
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this.element_.classList.add(this.CssClasses_.IS_DISABLED);
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} else {
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this.element_.classList.remove(this.CssClasses_.IS_DISABLED);
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}
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};
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MaterialTextfield.prototype['checkDisabled'] =
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MaterialTextfield.prototype.checkDisabled;
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/**
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* Check the focus state and update field accordingly.
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*
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* @public
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*/
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MaterialTextfield.prototype.checkFocus = function() {
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if (Boolean(this.element_.querySelector(':focus'))) {
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this.element_.classList.add(this.CssClasses_.IS_FOCUSED);
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} else {
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this.element_.classList.remove(this.CssClasses_.IS_FOCUSED);
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}
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};
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MaterialTextfield.prototype['checkFocus'] =
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MaterialTextfield.prototype.checkFocus;
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/**
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* Check the validity state and update field accordingly.
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*
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* @public
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*/
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MaterialTextfield.prototype.checkValidity = function() {
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if (this.input_.validity) {
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if (this.input_.validity.valid) {
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this.element_.classList.remove(this.CssClasses_.IS_INVALID);
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} else {
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this.element_.classList.add(this.CssClasses_.IS_INVALID);
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}
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}
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};
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MaterialTextfield.prototype['checkValidity'] =
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MaterialTextfield.prototype.checkValidity;
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/**
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* Check the dirty state and update field accordingly.
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*
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* @public
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*/
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MaterialTextfield.prototype.checkDirty = function() {
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if (
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(this.input_.value && this.input_.value.length > 0) ||
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(this.input_.placeholder.trim() !== '')
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) {
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this.element_.classList.add(this.CssClasses_.IS_DIRTY);
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} else {
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this.element_.classList.remove(this.CssClasses_.IS_DIRTY);
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}
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};
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MaterialTextfield.prototype['checkDirty'] =
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MaterialTextfield.prototype.checkDirty;
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/**
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* Disable text field.
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*
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* @public
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*/
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MaterialTextfield.prototype.disable = function() {
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this.input_.disabled = true;
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this.updateClasses_();
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};
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MaterialTextfield.prototype['disable'] = MaterialTextfield.prototype.disable;
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/**
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* Enable text field.
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*
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* @public
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*/
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MaterialTextfield.prototype.enable = function() {
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this.input_.disabled = false;
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this.updateClasses_();
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};
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MaterialTextfield.prototype['enable'] = MaterialTextfield.prototype.enable;
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/**
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* Update text field value.
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*
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* @param {string} value The value to which to set the control (optional).
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* @public
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*/
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MaterialTextfield.prototype.change = function(value) {
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this.input_.value = value || '';
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this.updateClasses_();
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};
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MaterialTextfield.prototype['change'] = MaterialTextfield.prototype.change;
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/**
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* Initialize element.
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*/
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MaterialTextfield.prototype.init = function() {
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if (this.element_) {
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this.label_ = this.element_.querySelector('.' + this.CssClasses_.LABEL);
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this.input_ = this.element_.querySelector('.' + this.CssClasses_.INPUT);
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if (this.input_) {
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if (this.input_.hasAttribute(
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/** @type {string} */ (this.Constant_.MAX_ROWS_ATTRIBUTE))) {
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this.maxRows = parseInt(this.input_.getAttribute(
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/** @type {string} */ (this.Constant_.MAX_ROWS_ATTRIBUTE)), 10);
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if (isNaN(this.maxRows)) {
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this.maxRows = this.Constant_.NO_MAX_ROWS;
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}
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}
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if (this.input_.hasAttribute('placeholder')) {
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this.element_.classList.add(this.CssClasses_.HAS_PLACEHOLDER);
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}
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this.boundUpdateClassesHandler = this.updateClasses_.bind(this);
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this.boundFocusHandler = this.onFocus_.bind(this);
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this.boundBlurHandler = this.onBlur_.bind(this);
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this.boundResetHandler = this.onReset_.bind(this);
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this.input_.addEventListener('input', this.boundUpdateClassesHandler);
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this.input_.addEventListener('focus', this.boundFocusHandler);
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this.input_.addEventListener('blur', this.boundBlurHandler);
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this.input_.addEventListener('reset', this.boundResetHandler);
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if (this.maxRows !== this.Constant_.NO_MAX_ROWS) {
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// TODO: This should handle pasting multi line text.
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// Currently doesn't.
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this.boundKeyDownHandler = this.onKeyDown_.bind(this);
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this.input_.addEventListener('keydown', this.boundKeyDownHandler);
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}
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var invalid = this.element_.classList
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.contains(this.CssClasses_.IS_INVALID);
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this.updateClasses_();
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this.element_.classList.add(this.CssClasses_.IS_UPGRADED);
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if (invalid) {
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this.element_.classList.add(this.CssClasses_.IS_INVALID);
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}
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if (this.input_.hasAttribute('autofocus')) {
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this.element_.focus();
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this.checkFocus();
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}
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}
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}
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};
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// The component registers itself. It can assume componentHandler is available
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// in the global scope.
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componentHandler.register({
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constructor: MaterialTextfield,
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classAsString: 'MaterialTextfield',
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cssClass: 'mdl-js-textfield',
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widget: true
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});
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})();
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