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GitOrigin-RevId: 63746295f1a5ab5a619056791995793d65529e62
diff --git a/node_modules/mdl-ext/src/sticky-header/_sticky-header.scss b/node_modules/mdl-ext/src/sticky-header/_sticky-header.scss
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+/**
+ * Copyright 2016 Leif Olsen. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Use of this module requires the user to include variables from material-design-lite
+//@import "../../node_modules/material-design-lite/src/variables";
+//@import "../../node_modules/material-design-lite/src/mixins";
+@import "../variables";
+
+.mdlext-layout__sticky-header {
+ position: absolute;
+ overflow: visible;
+ background: $mdlext-sticky-header-background;
+ transition: 0.1s ease-in-out;
+
+ &.mdlext-is-scroll {
+ background: $mdlext-sticky-header-background-scroll;
+ }
+}
+
+*:not(.is-small-screen) .mdlext-layout__sticky-header {
+ .mdl-layout__drawer-button {
+ visibility: hidden;
+ }
+ .mdl-layout__header-row {
+ padding-left: $padding;
+ }
+}
+
+*:not(.mdl-layout--fixed-drawer).has-drawer .mdlext-layout__sticky-header,
+.is-small-screen.has-drawer .mdlext-layout__sticky-header {
+ display: flex;
+
+ .mdl-layout__drawer-button {
+ visibility: visible;
+ }
+ .mdl-layout__header-row {
+ padding-left: $padding + $layout-drawer-button-desktop-size;
+ }
+}
diff --git a/node_modules/mdl-ext/src/sticky-header/readme.md b/node_modules/mdl-ext/src/sticky-header/readme.md
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+# Sticky Header
+
+
+
+A sticky header can be used as a replacement for the Material Design Lite
+[Fixed Header](https://github.com/google/material-design-lite/tree/master/src/layout#examples).
+
+## Introduction
+A sticky header makes site navigation easily accessible anywhere on the page and saves content space at the same.
+
+The header should auto-hide, i.e. hiding the header automatically when a user starts scrolling down the page and
+bringing the header back when a user might need it: they reach the bottom of the page or start scrolling up.
+
+>**Note:** The Sticky Header does not collapse on smaller screens.
+
+### To include a MDLEXT **sticky-header** component:
+
+ 1. Code a `<div>` element. This is the "outer" div that holds the entire layout.
+```html
+<div>
+</div>
+```
+
+ 2. Add MDL classes as indicated, separated by spaces, to the `div` using the class attribute.
+```html
+<div class="mdl-layout mdl-js-layout mdl-layout--fixed-drawer mdl-layout--fixed-header">
+</div>
+```
+
+ 3. Inside the div, code a `<header>` element, as described in the Material Design Lite
+[Component Guide](https://getmdl.io/components/index.html#layout-section/layout). Add MDL classes as indicated.
+```html
+<div class="mdl-layout mdl-js-layout mdl-layout--fixed-drawer mdl-layout--fixed-header">
+ <header class="mdl-layout__header mdlext-layout__sticky-header mdlext-js-sticky-header">
+ <div class="mdl-layout__header-row">
+
+ <!-- Title -->
+ <span id="header-title" class="mdl-layout-title">Title goes here</span>
+
+ <!-- Add spacer, to align navigation to the right -->
+ <div class="mdl-layout-spacer"></div>
+
+ <label id="go-home" class="mdl-button mdl-js-button mdl-button--icon mdl-button--colored">
+ <a href="#">
+ <i class="material-icons">home</i>
+ </a>
+ </label>
+ </div>
+ </header>
+</div>
+```
+
+ 4. Code a drawer, and include the MDL class as indicated
+```html
+<div class="mdl-layout mdl-js-layout mdl-layout--fixed-drawer mdl-layout--fixed-header">
+ <header class="mdl-layout__header mdlext-layout__sticky-header mdlext-js-sticky-header">
+ <div class="mdl-layout__header-row">
+
+ <!-- Title -->
+ <span id="header-title" class="mdl-layout-title">Title goes here</span>
+
+ <!-- Add spacer, to align navigation to the right -->
+ <div class="mdl-layout-spacer"></div>
+
+ <label id="go-home" class="mdl-button mdl-js-button mdl-button--icon mdl-button--colored">
+ <a href="#">
+ <i class="material-icons">home</i>
+ </a>
+ </label>
+ </div>
+ </header>
+
+ <aside class="mdl-layout__drawer">
+ <span class="mdl-layout-title">Drawer title</span>
+ <nav class="mdl-navigation">
+ <a class="mdl-navigation__link" href="#">A manu item</a>
+ </nav>
+ </aside>
+</div>
+```
+
+ 4. Add a `<main>` element to hold the layout's primary content, and include the MDL class as indicated
+```html
+<div class="mdl-layout mdl-js-layout mdl-layout--fixed-drawer mdl-layout--fixed-header">
+ <header class="mdl-layout__header mdlext-layout__sticky-header mdlext-js-sticky-header">
+ <div class="mdl-layout__header-row">
+
+ <!-- Title -->
+ <span id="header-title" class="mdl-layout-title">Title goes here</span>
+
+ <!-- Add spacer, to align navigation to the right -->
+ <div class="mdl-layout-spacer"></div>
+
+ <label id="go-home" class="mdl-button mdl-js-button mdl-button--icon mdl-button--colored">
+ <a href="#">
+ <i class="material-icons">home</i>
+ </a>
+ </label>
+ </div>
+ </header>
+
+ <aside class="mdl-layout__drawer">
+ <span class="mdl-layout-title">Drawer title</span>
+ <nav class="mdl-navigation">
+ <a class="mdl-navigation__link" href="#">A manu item</a>
+ </nav>
+ </aside>
+
+ <main class="mdl-layout__content">
+ <p>Content</p>
+ <p>Goes</p>
+ <p>Here</p>
+ </main>
+</div>
+```
+
+### Examples
+
+* [Sticky header, Fixed drawer](http://leifoolsen.github.io/mdl-ext/demo/sticky-header.html)
+* [Sticky header, Drawer](http://leifoolsen.github.io/mdl-ext/demo/sticky-header-ii.html)
+* [Sticky header, No Drawer](http://leifoolsen.github.io/mdl-ext/demo/sticky-header-iii.html)
+* [Sticky header, Waterfall, Fiexed Drawer](http://leifoolsen.github.io/mdl-ext/demo/sticky-header-iv.html)
+* [Sticky header, Waterfall, Drawer](http://leifoolsen.github.io/mdl-ext/demo/sticky-header-v.html)
+* [Sticky header, Waterfall, No Drawer](http://leifoolsen.github.io/mdl-ext/demo/sticky-header-vi.html)
+
+
+## Component configuration
+The component can be configured using a `data-config` attribute. The attribute value is a JSON string with the following properties.
+
+| Property | | |
+|----------------------|----|----|
+| `visibleAtScrollEnd` | if `true`, the header vil show when page is scrolled to the bottom | default: `false` |
+
+
+The `data-config` attribute must be a valid JSON string. You can use single or double quotes for the JSON properties.
+
+Example 1, single quotes in JSON config string:
+```html
+<header class="mdl-layout__header mdlext-layout__sticky-header mdlext-js-sticky-header"
+ data-config="{ 'visibleAtScrollEnd': true }">
+
+ <div class="mdl-layout__header-row">
+ <span id="header-title" class="mdl-layout-title">Title goes here</span>
+ </div>
+</header>
+```
+
+Example 2, double quotes in JSON config string:
+```html
+<header class="mdl-layout__header mdlext-layout__sticky-header mdlext-js-sticky-header"
+ data-config='{ "visibleAtScrollEnd": true }'>
+
+ <div class="mdl-layout__header-row">
+ <span id="header-title" class="mdl-layout-title">Title goes here</span>
+ </div>
+</header>
+```
+
+## Configuration options
+
+The MDLEXT CSS classes apply various predefined visual and behavioral enhancements to the lightbox.
+The table below lists the available classes and their effects.
+
+| MDLEXT class | Effect | Remarks |
+|--------------|--------|---------|
+| `mdlext-layout__sticky-header` | Defines a header as an MDLEXT header component | Required on `<header>` element |
+| `mdlext-js-sticky-header` | Assigns basic MDL behavior to header | Required on `<header>` element |
+
+
+## How to use the component programmatically
+The [tests](../../test/sticky-header/sticky-header.spec.js) provides example code on how to use the component programmatically.
+
diff --git a/node_modules/mdl-ext/src/sticky-header/sticky-header.js b/node_modules/mdl-ext/src/sticky-header/sticky-header.js
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+/**
+ * @license
+ * Copyright 2016 Leif Olsen. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This code is built with Google Material Design Lite,
+ * which is Licensed under the Apache License, Version 2.0
+ */
+
+/**
+ * A sticky header makes site navigation easily accessible anywhere on the page and saves content space at the same.
+ * The header should auto-hide, i.e. hiding the header automatically when a user starts scrolling down the page and
+ * bringing the header back when a user might need it: they reach the bottom of the page or start scrolling up.
+ */
+
+import fullThrottle from '../utils/full-throttle';
+import { jsonStringToObject } from '../utils/json-utils';
+import {
+ IS_UPGRADED
+} from '../utils/constants';
+
+
+(function() {
+ 'use strict';
+ const MDL_LAYOUT_CONTENT = 'mdl-layout__content';
+ const IS_SCROLL_CLASS = 'mdlext-is-scroll';
+
+
+ /**
+ * @constructor
+ * @param {Element} element The element that will be upgraded.
+ */
+ const MaterialExtStickyHeader = function MaterialExtStickyHeader(element) {
+ // Stores the element.
+ this.header_ = element;
+
+ // Heder listens to scroll events from content
+ this.content_ = null;
+ this.lastScrollTop_ = 0;
+
+ // Default config
+ this.config_ = {
+ visibleAtScrollEnd: false
+ };
+
+ this.mutationObserver_ = null;
+
+ this.drawing_ = false;
+
+ // Initialize instance.
+ this.init();
+ };
+
+ window['MaterialExtStickyHeader'] = MaterialExtStickyHeader;
+
+
+ /**
+ * Update header width
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.recalcWidth_ = function() {
+ this.header_.style.width = `${this.content_.clientWidth}px`;
+ };
+
+ const throttleResize = fullThrottle(self => self.recalcWidth_() );
+
+ /**
+ * Adjust header width when window resizes or oreientation changes
+ * @param event
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.resizeHandler_ = function( /* event */ ) {
+ throttleResize(this);
+ };
+
+
+ /**
+ * Update header position
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.reposition_ = function() {
+
+ const currentContentScrollTop = this.content_.scrollTop;
+ const scrollDiff = this.lastScrollTop_ - currentContentScrollTop;
+
+ if(currentContentScrollTop <= 0) {
+ // Scrolled to the top. Header sticks to the top
+ this.header_.style.top = '0';
+ this.header_.classList.remove(IS_SCROLL_CLASS);
+ }
+ else if(scrollDiff > 0) {
+
+ if(scrollDiff >= this.header_.offsetHeight) {
+
+ // Scrolled up. Header slides in
+ const headerTop = (parseInt( window.getComputedStyle( this.header_ ).getPropertyValue( 'top' ) ) || 0);
+ if(headerTop != 0) {
+ this.header_.style.top = '0';
+ this.header_.classList.add(IS_SCROLL_CLASS);
+ }
+ this.lastScrollTop_ = currentContentScrollTop;
+ }
+ return;
+ }
+ else if(scrollDiff < 0) {
+ // Scrolled down
+ this.header_.classList.add(IS_SCROLL_CLASS);
+ let headerTop = (parseInt( window.getComputedStyle( this.header_ ).getPropertyValue( 'top' ) ) || 0);
+
+ if (this.content_.scrollHeight - this.content_.scrollTop <= this.content_.offsetHeight) {
+ // Bottom of content
+ if(headerTop != 0) {
+ this.header_.style.top = this.config_.visibleAtScrollEnd ? '0' : `-${this.header_.offsetHeight}px`;
+ }
+ }
+ else {
+ headerTop += scrollDiff;
+ const offsetHeight = this.header_.offsetHeight;
+ this.header_.style.top = `${( Math.abs( headerTop ) > offsetHeight ? -offsetHeight : headerTop )}px`;
+ }
+ }
+
+ this.lastScrollTop_ = currentContentScrollTop;
+ };
+
+
+ const throttleScroll = fullThrottle((self) => self.reposition_());
+
+ /**
+ * Scroll header when content scrolls
+ * @param event
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.scrollHandler_ = function( /* event */ ) {
+ throttleScroll(this);
+ };
+
+ /**
+ * Init header position
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.updatePosition_ = function( /* event */ ) {
+ this.recalcWidth_();
+ this.reposition_();
+ };
+
+ /**
+ * Add mutation observer
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.addMutationObserver_ = function() {
+
+ // jsdom does not support MutationObserver - so this is not testable
+ /* istanbul ignore next */
+ this.mutationObserver_ = new MutationObserver( ( /*mutations*/ ) => {
+ // Adjust header width if content changes (e.g. in a SPA)
+ this.updatePosition_();
+ });
+
+ this.mutationObserver_.observe( this.content_, {
+ attributes: false,
+ childList: true,
+ characterData: false,
+ subtree: true
+ });
+ };
+
+ /**
+ * Removes event listeners
+ * @private
+ */
+ MaterialExtStickyHeader.prototype.removeListeners_ = function() {
+
+ window.removeEventListener('resize', this.resizeHandler_);
+ window.removeEventListener('orientationchange', this.resizeHandler_);
+
+ if(this.content_) {
+ this.content_.removeEventListener('scroll', this.scrollHandler_);
+ }
+
+ if(this.mutationObserver_) {
+ this.mutationObserver_.disconnect();
+ this.mutationObserver_ = null;
+ }
+ };
+
+ /**
+ * Initialize component
+ */
+ MaterialExtStickyHeader.prototype.init = function() {
+
+ if (this.header_) {
+
+ this.removeListeners_();
+
+ if(this.header_.hasAttribute('data-config')) {
+ this.config_ = jsonStringToObject(this.header_.getAttribute('data-config'));
+ }
+
+ this.content_ = this.header_.parentNode.querySelector(`.${MDL_LAYOUT_CONTENT}`) || null;
+
+ if(this.content_) {
+ this.content_.style.paddingTop = `${this.header_.offsetHeight}px`; // Make room for sticky header
+ this.lastScrollTop_ = this.content_.scrollTop;
+
+ this.content_.addEventListener('scroll', this.scrollHandler_.bind(this));
+ window.addEventListener('resize', this.resizeHandler_.bind(this));
+ window.addEventListener('orientationchange', this.resizeHandler_.bind(this));
+
+ this.addMutationObserver_();
+ this.updatePosition_();
+
+ // Set upgraded flag
+ this.header_.classList.add(IS_UPGRADED);
+ }
+ }
+ };
+
+ /*
+ * Downgrade component
+ * E.g remove listeners and clean up resources
+ *
+ * Nothing to clean
+ *
+ MaterialExtStickyHeader.prototype.mdlDowngrade_ = function() {
+ 'use strict';
+ console.log('***** MaterialExtStickyHeader.prototype.mdlDowngrade_');
+ };
+ */
+
+
+ // The component registers itself. It can assume componentHandler is available
+ // in the global scope.
+ /* eslint no-undef: 0 */
+ componentHandler.register({
+ constructor: MaterialExtStickyHeader,
+ classAsString: 'MaterialExtStickyHeader',
+ cssClass: 'mdlext-js-sticky-header'
+ });
+})();