Search and display style updates (#1005)

* Use same selectors

* Use consistent stylesheet declaration

* Fix query parser not being cleared

* Set property upon load

* Don't focus for Enter key press

* Update search page styles

* Update indent and nodes

* Support dark style

* Add missing var

ext/bg/js/search-main.js

@@ -28,6 +28,7 @@
         const displaySearch = new DisplaySearch();
         await displaySearch.prepare();
 
+        document.documentElement.dataset.loaded = 'true';
         yomichan.ready();
     } catch (e) {
         yomichan.logError(e);

ext/bg/js/search.js

@@ -25,12 +25,14 @@
 
 class DisplaySearch extends Display {
     constructor() {
-        super(document.querySelector('#spinner'), document.querySelector('#content'));
-        this._searchButton = document.querySelector('#search');
-        this._queryInput = document.querySelector('#query');
+        super();
+        this._searchButton = document.querySelector('#search-button');
+        this._queryInput = document.querySelector('#search-textbox');
         this._introElement = document.querySelector('#intro');
         this._clipboardMonitorEnableCheckbox = document.querySelector('#clipboard-monitor-enable');
         this._wanakanaEnableCheckbox = document.querySelector('#wanakana-enable');
+        this._queryInputEvents = new EventListenerCollection();
+        this._wanakanaEnabled = false;
         this._isPrepared = false;
         this._introVisible = true;
         this._introAnimationTimer = null;
@@ -42,7 +44,7 @@ class DisplaySearch extends Display {
         });
         this._onKeyDownIgnoreKeys = new Map([
             ['ANY_MOD', new Set([
-                'Tab', 'ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'PageDown', 'PageUp', 'Home', 'End',
+                'Tab', 'ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'PageDown', 'PageUp', 'Home', 'End', 'Enter',
                 'F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7', 'F8', 'F9', 'F10',
                 'F11', 'F12', 'F13', 'F14', 'F15', 'F16', 'F17', 'F18', 'F19', 'F20',
                 'F21', 'F22', 'F23', 'F24'
@@ -71,22 +73,16 @@ class DisplaySearch extends Display {
         this.queryParserVisible = true;
         this.setHistorySettings({useBrowserHistory: true});
 
-        const options = this.getOptions();
-        if (options.general.enableWanakana === true) {
-            this._wanakanaEnableCheckbox.checked = true;
-            wanakana.bind(this._queryInput);
-        } else {
-            this._wanakanaEnableCheckbox.checked = false;
-        }
+        const enableWanakana = !!this.getOptions().general.enableWanakana;
+        this._wanakanaEnableCheckbox.checked = enableWanakana;
+        this._setWanakanaEnabled(enableWanakana);
 
         this._searchButton.addEventListener('click', this._onSearch.bind(this), false);
-        this._queryInput.addEventListener('input', this._onSearchInput.bind(this), false);
         this._wanakanaEnableCheckbox.addEventListener('change', this._onWanakanaEnableChange.bind(this));
         window.addEventListener('copy', this._onCopy.bind(this));
         this._clipboardMonitor.on('change', this._onExternalSearchUpdate.bind(this));
         this._clipboardMonitorEnableCheckbox.addEventListener('change', this._onClipboardMonitorEnableChange.bind(this));
 
-        this._updateSearchButton();
         this._onModeChange();
 
         await this._prepareNestedPopups();
@@ -141,7 +137,7 @@ class DisplaySearch extends Display {
     }
 
     postProcessQuery(query) {
-        if (this._isWanakanaEnabled()) {
+        if (this._wanakanaEnabled) {
             try {
                 query = wanakana.toKana(query);
             } catch (e) {
@@ -173,28 +169,27 @@ class DisplaySearch extends Display {
         if (typeof source !== 'string') { source = ''; }
 
         this._queryInput.value = source;
+        this._updateSearchHeight();
         this._setIntroVisible(!valid, animate);
-        this._updateSearchButton();
     }
 
     _onSearchInput() {
-        this._updateSearchButton();
-
-        const queryElementRect = this._queryInput.getBoundingClientRect();
-        if (queryElementRect.top < 0 || queryElementRect.bottom > window.innerHeight) {
-            this._queryInput.scrollIntoView();
+        this._updateSearchHeight();
     }
+
+    _onSearchKeydown(e) {
+        if (e.code !== 'Enter' || e.shiftKey) { return; }
+
+        // Search
+        e.preventDefault();
+        e.stopImmediatePropagation();
+        e.currentTarget.blur();
+        this._search();
     }
 
     _onSearch(e) {
-        if (this._queryInput === null) {
-            return;
-        }
-
         e.preventDefault();
-
-        const query = this._queryInput.value;
-        this._onSearchQueryUpdated(query, true);
+        this._search();
     }
 
     _onCopy() {
@@ -228,11 +223,7 @@ class DisplaySearch extends Display {
 
     _onWanakanaEnableChange(e) {
         const value = e.target.checked;
-        if (value) {
-            wanakana.bind(this._queryInput);
-        } else {
-            wanakana.unbind(this._queryInput);
-        }
+        this._setWanakanaEnabled(value);
         api.modifySettings([{
             action: 'set',
             path: 'general.enableWanakana',
@@ -254,8 +245,22 @@ class DisplaySearch extends Display {
         this._updateClipboardMonitorEnabled();
     }
 
-    _isWanakanaEnabled() {
-        return this._wanakanaEnableCheckbox !== null && this._wanakanaEnableCheckbox.checked;
+    _setWanakanaEnabled(enabled) {
+        const input = this._queryInput;
+        this._queryInputEvents.removeAllEventListeners();
+
+        this._queryInputEvents.addEventListener(input, 'keydown', this._onSearchKeydown.bind(this), false);
+
+        if (this._wanakanaEnabled !== enabled) {
+            this._wanakanaEnabled = enabled;
+            if (enabled) {
+                wanakana.bind(input);
+            } else {
+                wanakana.unbind(input);
+            }
+        }
+
+        this._queryInputEvents.addEventListener(input, 'input', this._onSearchInput.bind(this), false);
     }
 
     _setIntroVisible(visible, animate) {
@@ -314,10 +319,6 @@ class DisplaySearch extends Display {
         this._introElement.style.height = '0';
     }
 
-    _updateSearchButton() {
-        this._searchButton.disabled = this._introVisible && (this._queryInput === null || this._queryInput.value.length === 0);
-    }
-
     async _prepareNestedPopups() {
         let complete = false;
 
@@ -388,4 +389,18 @@ class DisplaySearch extends Display {
             );
         });
     }
+
+    _search() {
+        const query = this._queryInput.value;
+        this._onSearchQueryUpdated(query, true);
+    }
+
+    _updateSearchHeight() {
+        const node = this._queryInput;
+        const {scrollHeight} = node;
+        const currentHeight = node.getBoundingClientRect().height;
+        if (scrollHeight >= currentHeight - 1) {
+            node.style.height = `${scrollHeight}px`;
+        }
+    }
 }

ext/bg/search.html

@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <html lang="en" data-yomichan-page="search">
-    <head>
+<head>
     <meta charset="UTF-8">
-        <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <meta name="viewport" content="width=device-width,initial-scale=1">
     <title>Yomichan Search</title>
     <link rel="icon" type="image/png" href="/mixed/img/icon16.png" sizes="16x16">
     <link rel="icon" type="image/png" href="/mixed/img/icon19.png" sizes="19x19">
@@ -11,95 +11,85 @@
     <link rel="icon" type="image/png" href="/mixed/img/icon48.png" sizes="48x48">
     <link rel="icon" type="image/png" href="/mixed/img/icon64.png" sizes="64x64">
     <link rel="icon" type="image/png" href="/mixed/img/icon128.png" sizes="128x128">
-        <link rel="stylesheet" type="text/css" href="/mixed/lib/bootstrap/css/bootstrap.min.css">
-        <link rel="stylesheet" type="text/css" href="/mixed/lib/bootstrap/css/bootstrap-theme.min.css">
+    <link rel="stylesheet" type="text/css" href="/mixed/css/search.css">
     <link rel="stylesheet" type="text/css" href="/mixed/css/display.css">
-    </head>
-    <body>
-        <div class="container">
-            <div id="intro" style="overflow: hidden;">
-                <div class="page-header">
+</head>
+<body>
+
+<div class="content"><div class="content-center">
+
+    <div id="intro">
         <h1>Yomichan Search</h1>
     </div>
-                <p style="margin-bottom: 0;">Search your installed dictionaries by entering a Japanese expression into the field below.</p>
-            </div>
 
-            <div class="search-input">
-                <div class="input-group" style="padding-top: 20px;">
-                    <span title="Enable kana input method" class="input-group-text">
-                        <input type="checkbox" id="wanakana-enable" class="icon-checkbox" />
-                        <label for="wanakana-enable" class="scan-disable">あ</label>
-                    </span>
-                    <span title="Enable clipboard monitor" class="input-group-text">
-                        <input type="checkbox" id="clipboard-monitor-enable" class="icon-checkbox" />
-                        <label for="clipboard-monitor-enable"><span class="glyphicon glyphicon-paste"></span></label>
-                    </span>
+    <div class="scan-disable">
+        <div class="search-options">
+            <label class="search-option">
+                <label class="toggle"><input type="checkbox" id="wanakana-enable"><span class="toggle-body"><span class="toggle-track"></span><span class="toggle-knob"></span></span></label>
+                <span class="search-option-label">Automatic kana conversion</span>
+            </label>
+            <label class="search-option">
+                <label class="toggle"><input type="checkbox" id="clipboard-monitor-enable"><span class="toggle-body"><span class="toggle-track"></span><span class="toggle-knob"></span></span></label>
+                <span class="search-option-label">Clipboard monitor</span>
+            </label>
+        </div>
+        <div class="search-textbox-container">
+            <textarea id="search-textbox" placeholder="Input a term, expression, sentence, or block of text" autocomplete="false" autofocus></textarea>
+            <button id="search-button"><span class="icon-button-icon" data-icon="magnifying-glass"></span></button>
         </div>
-
-                <form class="input-group">
-                    <input type="text" class="form-control" placeholder="Search for..." id="query" autofocus>
-                    <span class="input-group-btn">
-                        <input type="submit" class="btn btn-default form-control" id="search" value="Search">
-                    </span>
-                </form>
     </div>
 
     <div id="spinner" hidden><img src="/mixed/img/spinner.gif"></div>
 
     <div class="scan-disable" id="query-parser-container">
-                <div id="query-parser-select-container" class="input-group"></div>
+        <div id="query-parser-select-container"></div>
         <div id="query-parser-content"></div>
     </div>
 
-            <hr>
-
-            <div id="navigation-header" class="navigation-header" hidden><div class="navigation-header-actions">
-                <button class="action-button action-previous" data-icon="source-term" title="Source term (Alt + B)"></button>
-                <button class="action-button action-next" data-icon="source-term" title="Next term (Alt + F)"></button>
-            </div></div><div class="navigation-header-spacer"></div>
-
-            <div id="content"></div>
+    <div id="definitions"></div>
 
     <div id="no-results" hidden>
         <div class="entry">
             <p>No results found.</p>
         </div>
     </div>
-        </div>
 
-        <script src="/mixed/lib/wanakana.min.js"></script>
+</div></div>
 
-        <script src="/mixed/js/core.js"></script>
-        <script src="/mixed/js/yomichan.js"></script>
-        <script src="/mixed/js/comm.js"></script>
-        <script src="/mixed/js/api.js"></script>
-        <script src="/mixed/js/japanese.js"></script>
+<script src="/mixed/lib/wanakana.min.js"></script>
 
-        <script src="/mixed/js/cache-map.js"></script>
-        <script src="/mixed/js/document-util.js"></script>
-        <script src="/fg/js/dom-text-scanner.js"></script>
-        <script src="/fg/js/text-source-range.js"></script>
-        <script src="/fg/js/text-source-element.js"></script>
-        <script src="/mixed/js/audio-system.js"></script>
-        <script src="/mixed/js/dictionary-data-util.js"></script>
-        <script src="/mixed/js/display.js"></script>
-        <script src="/mixed/js/display-generator.js"></script>
-        <script src="/mixed/js/display-history.js"></script>
-        <script src="/mixed/js/dynamic-loader.js"></script>
-        <script src="/mixed/js/media-loader.js"></script>
-        <script src="/mixed/js/scroll.js"></script>
-        <script src="/mixed/js/text-scanner.js"></script>
-        <script src="/mixed/js/html-template-collection.js"></script>
-        <script src="/mixed/js/text-to-speech-audio.js"></script>
+<script src="/mixed/js/core.js"></script>
+<script src="/mixed/js/yomichan.js"></script>
+<script src="/mixed/js/comm.js"></script>
+<script src="/mixed/js/api.js"></script>
+<script src="/mixed/js/japanese.js"></script>
 
-        <script src="/bg/js/anki-note-builder.js"></script>
-        <script src="/bg/js/template-renderer-proxy.js"></script>
+<script src="/mixed/js/cache-map.js"></script>
+<script src="/mixed/js/document-util.js"></script>
+<script src="/fg/js/dom-text-scanner.js"></script>
+<script src="/fg/js/text-source-range.js"></script>
+<script src="/fg/js/text-source-element.js"></script>
+<script src="/mixed/js/audio-system.js"></script>
+<script src="/mixed/js/dictionary-data-util.js"></script>
+<script src="/mixed/js/display.js"></script>
+<script src="/mixed/js/display-generator.js"></script>
+<script src="/mixed/js/display-history.js"></script>
+<script src="/mixed/js/dynamic-loader.js"></script>
+<script src="/mixed/js/media-loader.js"></script>
+<script src="/mixed/js/scroll.js"></script>
+<script src="/mixed/js/text-scanner.js"></script>
+<script src="/mixed/js/html-template-collection.js"></script>
+<script src="/mixed/js/text-to-speech-audio.js"></script>
 
-        <script src="/bg/js/query-parser-generator.js"></script>
-        <script src="/bg/js/query-parser.js"></script>
-        <script src="/bg/js/clipboard-monitor.js"></script>
-        <script src="/bg/js/search.js"></script>
+<script src="/bg/js/anki-note-builder.js"></script>
+<script src="/bg/js/template-renderer-proxy.js"></script>
 
-        <script src="/bg/js/search-main.js"></script>
-    </body>
+<script src="/bg/js/query-parser-generator.js"></script>
+<script src="/bg/js/query-parser.js"></script>
+<script src="/bg/js/clipboard-monitor.js"></script>
+<script src="/bg/js/search.js"></script>
+
+<script src="/bg/js/search-main.js"></script>
+
+</body>
 </html>

ext/fg/float.html

@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <html lang="en" data-yomichan-page="float">
-    <head>
+<head>
     <meta charset="UTF-8">
-        <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <meta name="viewport" content="width=device-width,initial-scale=1">
     <title>Yomichan Search</title>
     <link rel="icon" type="image/png" href="/mixed/img/icon16.png" sizes="16x16">
     <link rel="icon" type="image/png" href="/mixed/img/icon19.png" sizes="19x19">
@@ -11,9 +11,10 @@
     <link rel="icon" type="image/png" href="/mixed/img/icon48.png" sizes="48x48">
     <link rel="icon" type="image/png" href="/mixed/img/icon64.png" sizes="64x64">
     <link rel="icon" type="image/png" href="/mixed/img/icon128.png" sizes="128x128">
-        <link rel="stylesheet" href="/mixed/css/display.css">
-    </head>
-    <body>
+    <link rel="stylesheet" type="text/css" href="/mixed/css/display.css">
+</head>
+<body>
+
     <div id="spinner" hidden><img src="/mixed/img/spinner.gif"></div>
 
     <div id="navigation-header" class="navigation-header" hidden><div class="navigation-header-actions">
@@ -44,37 +45,37 @@
         </div>
     </div>
 
-        <script src="/mixed/js/core.js"></script>
-        <script src="/mixed/js/yomichan.js"></script>
-        <script src="/mixed/js/comm.js"></script>
-        <script src="/mixed/js/api.js"></script>
-        <script src="/mixed/js/japanese.js"></script>
+<script src="/mixed/js/core.js"></script>
+<script src="/mixed/js/yomichan.js"></script>
+<script src="/mixed/js/comm.js"></script>
+<script src="/mixed/js/api.js"></script>
+<script src="/mixed/js/japanese.js"></script>
 
-        <script src="/mixed/js/cache-map.js"></script>
-        <script src="/mixed/js/document-util.js"></script>
-        <script src="/fg/js/dom-text-scanner.js"></script>
-        <script src="/fg/js/text-source-range.js"></script>
-        <script src="/fg/js/text-source-element.js"></script>
-        <script src="/mixed/js/audio-system.js"></script>
-        <script src="/mixed/js/dictionary-data-util.js"></script>
-        <script src="/mixed/js/display.js"></script>
-        <script src="/mixed/js/display-generator.js"></script>
-        <script src="/mixed/js/display-history.js"></script>
-        <script src="/mixed/js/dynamic-loader.js"></script>
-        <script src="/mixed/js/frame-endpoint.js"></script>
-        <script src="/mixed/js/media-loader.js"></script>
-        <script src="/mixed/js/scroll.js"></script>
-        <script src="/mixed/js/text-scanner.js"></script>
-        <script src="/mixed/js/html-template-collection.js"></script>
-        <script src="/mixed/js/text-to-speech-audio.js"></script>
+<script src="/mixed/js/cache-map.js"></script>
+<script src="/mixed/js/document-util.js"></script>
+<script src="/fg/js/dom-text-scanner.js"></script>
+<script src="/fg/js/text-source-range.js"></script>
+<script src="/fg/js/text-source-element.js"></script>
+<script src="/mixed/js/audio-system.js"></script>
+<script src="/mixed/js/dictionary-data-util.js"></script>
+<script src="/mixed/js/display.js"></script>
+<script src="/mixed/js/display-generator.js"></script>
+<script src="/mixed/js/display-history.js"></script>
+<script src="/mixed/js/dynamic-loader.js"></script>
+<script src="/mixed/js/frame-endpoint.js"></script>
+<script src="/mixed/js/media-loader.js"></script>
+<script src="/mixed/js/scroll.js"></script>
+<script src="/mixed/js/text-scanner.js"></script>
+<script src="/mixed/js/html-template-collection.js"></script>
+<script src="/mixed/js/text-to-speech-audio.js"></script>
 
-        <script src="/bg/js/anki-note-builder.js"></script>
-        <script src="/bg/js/template-renderer-proxy.js"></script>
+<script src="/bg/js/anki-note-builder.js"></script>
+<script src="/bg/js/template-renderer-proxy.js"></script>
 
-        <script src="/bg/js/query-parser-generator.js"></script>
-        <script src="/bg/js/query-parser.js"></script>
-        <script src="/fg/js/float.js"></script>
+<script src="/bg/js/query-parser-generator.js"></script>
+<script src="/bg/js/query-parser.js"></script>
+<script src="/fg/js/float.js"></script>
 
-        <script src="/fg/js/float-main.js"></script>
-    </body>
+<script src="/fg/js/float-main.js"></script>
+</body>
 </html>

ext/fg/js/float.js

@@ -23,7 +23,7 @@
 
 class DisplayFloat extends Display {
     constructor() {
-        super(document.querySelector('#spinner'), document.querySelector('#definitions'));
+        super();
         this._nestedPopupsPrepared = false;
         this._frameEndpoint = new FrameEndpoint();
         this._windowMessageHandlers = new Map([

ext/mixed/css/display.css

@@ -187,23 +187,6 @@ h2 {
  * Search page
  */
 
-.icon-checkbox {
-    display: none;
-}
-
-.icon-checkbox+label {
-    cursor: pointer;
-    font-size: 1.6em;
-    padding: 0.1em;
-    user-select: none;
-}
-
-.icon-checkbox:checked+label {
-    /* Invert colors */
-    background-color: var(--default-text-color);
-    color: var(--background-color);
-}
-
 #query-parser-content {
     margin-top: 0.5em;
     font-size: 2em;

ext/mixed/css/search.css

@@ -0,0 +1,326 @@
+/*
+ * Copyright (C) 2020  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* Variables */
+:root {
+    --main-content-size: 700px;
+    --main-content-padding: 10px;
+    --shadow-color: rgba(0, 0, 0, 0.185);
+    --shadow-vertical: 0 1px 4px 0 var(--shadow-color), 0 2px 2px 0 var(--shadow-color);
+
+    --font-size-default: 14px;
+    --line-height-default: calc(20 / 14);
+    --thin-border-size: 1px;
+    --toggle-size: 16px;
+
+    --textarea-line-height: 1.25em;
+    --textarea-padding: 0.5em;
+
+    --animation-duration: 0s;
+    --animation-duration2: calc(var(--animation-duration) * 2);
+
+    --text-color-default: #222222;
+    --background-color: #ffffff;
+    --background-color-light: #ffffff;
+    --input-background-color: #f2f2f2;
+    --input-background-color-dark: #dddddd;
+    --input-background-color-darker: #cccccc;
+    --separator-color1: #cccccc;
+    --button-icon-color: #333333;
+    --toggle-track-color: #cccccc;
+    --toggle-knob-color: #ffffff;
+    --selectable-indicator-color: rgba(160, 160, 160, 0.25);
+    --disabled-color: #aaaaaa;
+    --disabled-color-light: #dddddd;
+    --disabled-color-lighter: #eeeeee;
+    --accent-color: #1a73e8;
+    --accent-color-lighter: #8db9f4;
+    --accent-color-transparent25: rgba(28, 116, 233, 0.25);
+}
+:root[data-loaded=true] {
+    --animation-duration: 0.125s;
+}
+:root[data-yomichan-theme=dark] {
+    --text-color-default: #d8d8d8;
+    --background-color: #1e1e1e;
+    --shadow-color: rgba(255, 255, 255, 0.185);
+    --separator-color1: #cccccc;
+    --input-background-color: #2f2f2f;
+    --input-background-color-dark: #383838;
+    --input-background-color-darker: #484848;
+    --selectable-indicator-color: rgba(100, 100, 100, 0.25);
+    --button-icon-color: #cccccc;
+    --disabled-color: #444444;
+    --disabled-color-light: #585858;
+    --disabled-color-lighter: #777777;
+}
+
+/* Common styles */
+:root {
+    height: 100%;
+}
+body {
+    background-color: var(--background-color);
+    margin: 0;
+    padding: 0;
+    margin: 0;
+    font-size: var(--font-size-default);
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+    color: var(--text-color-default);
+    line-height: var(--line-height-default);
+    height: 100%;
+    overflow: hidden;
+}
+h1 {
+    font-size: 2em;
+    line-height: 1.5em;
+    margin: 0;
+    padding: 0.25em 0 0;
+    font-weight: normal;
+    box-sizing: border-box;
+    border-bottom: var(--thin-border-size) solid var(--separator-color1);
+}
+
+/* Material design toggle switch */
+label.toggle {
+    cursor: default;
+}
+.toggle {
+    font-size: var(--toggle-size);
+    display: inline-block;
+}
+.toggle>input[type=checkbox] {
+    opacity: 0;
+    width: 0;
+    height: 0;
+    display: block;
+    margin: 0;
+    padding: 0;
+    border: none;
+    appearance: none;
+    -moz-appearance: none;
+}
+.toggle-body {
+    display: block;
+    cursor: pointer;
+    width: 2em;
+    height: 1em;
+    position: relative;
+}
+.toggle-track {
+    display: block;
+    position: absolute;
+    left: 0.125em;
+    right: 0.125em;
+    top: 0.125em;
+    bottom: 0.125em;
+    background-color: var(--toggle-track-color);
+    border-radius: 0.4375em;
+    transition: background-color var(--animation-duration) ease-in-out;
+}
+.toggle-knob {
+    display: block;
+    position: absolute;
+    left: 0;
+    top: 0;
+    width: 1em;
+    height: 1em;
+    background-color: var(--toggle-knob-color);
+    border-radius: 0.5em;
+    box-shadow: var(--shadow-vertical);
+    transition: transform var(--animation-duration) ease-in-out,
+                background-color var(--animation-duration) ease-in-out;
+}
+.toggle-body>.toggle-knob::after {
+    position: absolute;
+    display: block;
+    content: "";
+    left: -0.75em;
+    top: -0.75em;
+    right: -0.75em;
+    bottom: -0.75em;
+    border-radius: 2.5em;
+    background-color: var(--selectable-indicator-color);
+    pointer-events: none;
+    transform: scale(0);
+    opacity: 0;
+    visibility: hidden;
+    transition: transform 0s ease-in-out var(--animation-duration2),
+                background-color var(--animation-duration2) ease-in-out,
+                opacity var(--animation-duration2) ease-in-out,
+                visibility 0s ease-in-out var(--animation-duration2);
+}
+.toggle>input[type=checkbox]:focus:not(:disabled)+.toggle-body>.toggle-knob::after,
+.toggle:active>input[type=checkbox]:not(:disabled)+.toggle-body>.toggle-knob::after {
+    transform: scale(1);
+    opacity: 1;
+    visibility: visible;
+    transition: transform var(--animation-duration2) ease-in-out,
+                background-color var(--animation-duration2) ease-in-out,
+                opacity var(--animation-duration2) ease-in-out,
+                visibility var(--animation-duration2) ease-in-out;
+}
+.toggle>input[type=checkbox]:focus+.toggle-body>.toggle-knob::after {
+    opacity: 0.5;
+}
+.toggle:active>input[type=checkbox]:focus+.toggle-body>.toggle-knob::after {
+    opacity: 1;
+}
+.toggle>input[type=checkbox]:checked+.toggle-body>.toggle-knob {
+    transform: translateX(1em);
+}
+.toggle>input[type=checkbox]:checked:not(:disabled)+.toggle-body>.toggle-track {
+    background-color: var(--accent-color-lighter);
+}
+.toggle>input[type=checkbox]:checked:not(:disabled)+.toggle-body>.toggle-knob {
+    background-color: var(--accent-color);
+}
+.toggle>input[type=checkbox]:focus:checked:not(:disabled)+.toggle-body>.toggle-knob::after,
+.toggle:active>input[type=checkbox]:checked:not(:disabled)+.toggle-body>.toggle-knob::after {
+    background-color: var(--accent-color-transparent25);
+}
+.toggle>input[type=checkbox]:disabled+.toggle-body {
+    cursor: default;
+}
+.toggle>input[type=checkbox]:disabled+.toggle-body>.toggle-track {
+    background-color: var(--disabled-color-light);
+}
+.toggle>input[type=checkbox]:disabled+.toggle-body>.toggle-knob {
+    background-color: var(--disabled-color-lighter);
+}
+
+/* Content layout */
+.content {
+    flex: 1 0 auto;
+    flex-flow: row nowrap;
+    width: 100%;
+    display: flex;
+    position: relative;
+    align-items: stretch;
+    justify-content: center;
+}
+.content-center {
+    flex: 1 1 auto;
+    width: var(--main-content-size);
+    padding: 0 var(--main-content-padding);
+    max-width: var(--main-content-size);
+    box-sizing: border-box;
+}
+
+/* Search bar */
+.search-textbox-container {
+    display: flex;
+    flex-flow: row nowrap;
+    width: 100%;
+    align-items: stretch;
+    margin: 0;
+    padding: 0;
+    border: 0;
+}
+#search-textbox {
+    color: var(--text-color-default);
+    flex: 1 1 auto;
+    box-sizing: border-box;
+    padding: var(--textarea-padding);
+    font-family: 'Courier New', Courier, monospace;
+    background-color: var(--input-background-color);
+    border-radius: 0;
+    line-height: var(--textarea-line-height);
+    border: 0;
+    outline: none;
+    width: 100%;
+    height: calc(var(--textarea-line-height) + var(--textarea-padding) * 2);
+    min-height: calc(var(--textarea-line-height) + var(--textarea-padding) * 2);
+    max-height: calc(var(--textarea-line-height) * 10 + var(--textarea-padding) * 2);
+    resize: vertical;
+    font-size: var(--font-size-default);
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+    color: var(--text-color-default);
+    white-space: pre-wrap;
+}
+#search-button {
+    flex: 0 0 auto;
+    position: relative;
+    width: 2.5em;
+    background-color: var(--input-background-color);
+    border: 0;
+    padding: 0;
+    margin: 0;
+    cursor: pointer;
+    outline: none;
+    transition: background-color var(--animation-duration) ease-in-out;
+}
+#search-button:hover,
+#search-button:focus {
+    background-color: var(--input-background-color-dark);
+}
+#search-button:active {
+    background-color: var(--input-background-color-darker);
+}
+
+.icon-button-icon {
+    display: block;
+    position: absolute;
+    left: 0;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    background-color: var(--button-icon-color);
+    mask-repeat: no-repeat;
+    mask-position: center center;
+    mask-mode: alpha;
+    -webkit-mask-repeat: no-repeat;
+    -webkit-mask-position: center center;
+    -webkit-mask-mode: alpha;
+}
+.icon-button-icon[data-icon=magnifying-glass] {
+    mask-image: url(/mixed/img/magnifying-glass.svg);
+    -webkit-mask-image: url(/mixed/img/magnifying-glass.svg);
+    mask-size: 16px 16px;
+    -webkit-mask-size: 16px 16px;
+}
+
+/* Search options */
+.search-options {
+    display: flex;
+    flex-flow: row wrap;
+    margin: 0.5em -1em;
+    align-items: center;
+}
+.search-option {
+    display: flex;
+    flex: 0 1 auto;
+    margin: 0.5em 1em;
+    align-items: center;
+    cursor: pointer;
+}
+.search-option-label {
+    padding-left: 0.5em;
+}
+
+/* Search styles */
+#intro {
+    overflow: hidden;
+}
+#intro>p {
+    margin: 0;
+}
+
+#query-parser-content:not(:empty) {
+    border-bottom: var(--thin-border-size) solid var(--separator-color1);
+    padding-bottom: 0.5em;
+}

ext/mixed/js/display.js

@@ -32,10 +32,10 @@
  */
 
 class Display extends EventDispatcher {
-    constructor(spinner, container) {
+    constructor() {
         super();
-        this._spinner = spinner;
-        this._container = container;
+        this._spinner = document.querySelector('#spinner');
+        this._container = document.querySelector('#definitions');
         this._definitions = [];
         this._optionsContext = {depth: 0, url: window.location.href};
         this._options = null;
@@ -804,7 +804,10 @@ class Display extends EventDispatcher {
 
     async _setContentTermsOrKanji(token, isTerms, urlSearchParams, eventArgs) {
         let source = urlSearchParams.get('query');
-        if (!source) { return false; }
+        if (!source) {
+            this._setQueryParserText('');
+            return false;
+        }
 
         let {state, content} = this._history;
         let changeHistory = false;