138 lines
4.0 KiB
JavaScript
138 lines
4.0 KiB
JavaScript
/**
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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 MaterialComponentsSnippets() {
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'use strict';
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// Find all code snippet buttons.
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this.snippetButtons = document.querySelectorAll(
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'.snippet-caption .copy-to-clipboard-button');
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this.init();
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}
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/**
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* Initializes the MaterialComponentsSnippets components.
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*/
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MaterialComponentsSnippets.prototype.init = function() {
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'use strict';
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[].slice.call(this.snippetButtons).forEach(function(snippetButton) {
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snippetButton.addEventListener('mouseover',
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this.onMouseOverHandler(snippetButton));
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snippetButton.addEventListener('mouseout',
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this.onMouseOutHandler(snippetButton));
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snippetButton.addEventListener('mouseup',
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this.onMouseDownHandler(snippetButton));
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var clippy = snippetButton.querySelectorAll('.clippy');
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if (clippy.length > 0) {
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clippy[0].addEventListener('mouseover',
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this.onMouseOverHandler(snippetButton));
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clippy[0].addEventListener('mouseout',
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this.onMouseOutHandler(snippetButton));
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clippy[0].addEventListener('mouseup',
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this.onMouseDownHandler(snippetButton));
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}
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}, this);
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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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* @enum {string}
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* @private
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*/
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MaterialComponentsSnippets.prototype.CssClasses_ = {
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HIGHLIGHTED: 'highlighted',
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COPIED: 'copied'
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};
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/**
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* Gets the <code> element that is referenced but the given button.
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* @param {HTMLElement} button The snippet copy button
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* @return {HTMLElement} the code element referenced by the button
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*/
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MaterialComponentsSnippets.prototype.getCodeElement = function(button) {
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'use strict';
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var href = button.getAttribute('href');
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if (href && href.indexOf('#') >= 0) {
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return document.getElementById(href.split('#')[1]);
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}
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return null;
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};
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/**
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* Returns a mouseDownHandler for a snippet copy button.
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* @param {HTMLElement} button the snippet copy button
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* @return {function} the click handler
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*/
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MaterialComponentsSnippets.prototype.onMouseDownHandler = function(button) {
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'use strict';
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var ctx = this;
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return function() {
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var code = ctx.getCodeElement(button);
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if (code) {
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code.classList.add(ctx.CssClasses_.COPIED);
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}
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};
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};
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/**
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* Returns a mouseOverHandler for a snippet copy button.
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* @param {HTMLElement} button the snippet copy button
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* @return {function} the click handler
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*/
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MaterialComponentsSnippets.prototype.onMouseOverHandler = function(button) {
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'use strict';
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var ctx = this;
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return function() {
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var code = ctx.getCodeElement(button);
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if (code) {
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code.classList.add(ctx.CssClasses_.HIGHLIGHTED);
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}
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};
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};
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/**
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* Returns a mouseOutHandler for a snippet copy button.
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* @param {HTMLElement} button the snippet copy button
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* @return {function} the click handler
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*/
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MaterialComponentsSnippets.prototype.onMouseOutHandler = function(button) {
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'use strict';
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var ctx = this;
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return function() {
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var code = ctx.getCodeElement(button);
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if (code) {
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code.classList.remove(ctx.CssClasses_.HIGHLIGHTED);
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code.classList.remove(ctx.CssClasses_.COPIED);
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}
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};
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};
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window.addEventListener('load', function() {
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'use strict';
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// Handle the case where Flash is not available.
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if (swfobject && !swfobject.hasFlashPlayerVersion('9.0.0')) {
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document.body.classList.add('no-flash');
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}
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new MaterialComponentsSnippets();
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});
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