Structured content updates (#1733)

* Add support for imageRendering

* Make crisp-edges appearance on Firefox more similar to Chrome

* Refactor

* Add background option

* Move data-image-rendering attribute

* Restructure

* Organize

* Add support for appearance

* Update test dictionary

* Update tests

9 files changed, 153 insertions, 14 deletions

diff --git a/ext/css/display.css b/ext/css/display.css
index ac9dae0a..45658f19 100644
--- a/ext/css/display.css
+++ b/ext/css/display.css
@@ -1566,6 +1566,8 @@ button.definition-item-expansion-button:focus:focus-visible+.definition-item-con
     line-height: 0;
     font-size: calc(1em / var(--font-size-no-units));
     overflow: hidden;
+}
+.gloss-image-link[data-background=true]>.gloss-image-container {
     background-color: var(--gloss-image-background-color);
 }
 .gloss-image-link {
@@ -1600,6 +1602,18 @@ button.definition-item-expansion-button:focus:focus-visible+.definition-item-con
     text-align: center;
     padding: 0.25em;
 }
+.gloss-image-background {
+    position: absolute;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    background-color: var(--text-color);
+
+    --image: none;
+    --icon-size: contain;
+    --icon-image: var(--image);
+}
 .gloss-image {
     display: inline-block;
     vertical-align: top;
@@ -1617,13 +1631,27 @@ button.definition-item-expansion-button:focus:focus-visible+.definition-item-con
 .gloss-image:not([src]) {
     display: none;
 }
-.gloss-image[data-pixelated=true] {
+.gloss-image-link[data-image-rendering=pixelated] .gloss-image,
+.gloss-image-link[data-image-rendering=pixelated] .gloss-image-background {
     image-rendering: auto;
     image-rendering: -moz-crisp-edges;
     image-rendering: -webkit-optimize-contrast;
     image-rendering: pixelated;
     image-rendering: crisp-edges;
 }
+.gloss-image-link[data-image-rendering=crisp-edges] .gloss-image,
+.gloss-image-link[data-image-rendering=crisp-edges] .gloss-image-background {
+    image-rendering: auto;
+    image-rendering: -moz-crisp-edges;
+    image-rendering: -webkit-optimize-contrast;
+    image-rendering: crisp-edges;
+}
+:root[data-browser=firefox] .gloss-image-link[data-image-rendering=crisp-edges] .gloss-image,
+:root[data-browser=firefox] .gloss-image-link[data-image-rendering=crisp-edges] .gloss-image-background,
+:root[data-browser=firefox-mobile] .gloss-image-link[data-image-rendering=crisp-edges] .gloss-image,
+:root[data-browser=firefox-mobile] .gloss-image-link[data-image-rendering=crisp-edges] .gloss-image-background {
+    image-rendering: auto;
+}
 .gloss-image-link[data-has-aspect-ratio=true] .gloss-image-aspect-ratio-sizer {
     display: inline-block;
     width: 0;
@@ -1645,6 +1673,13 @@ button.definition-item-expansion-button:focus:focus-visible+.definition-item-con
     white-space: pre-line;
 }
 
+.gloss-image-link[data-appearance=monochrome] .gloss-image {
+    visibility: hidden;
+}
+.gloss-image-link:not([data-appearance=monochrome]) .gloss-image-background {
+    display: none;
+}
+
 .gloss-image-link[data-size-units=em] .gloss-image-container {
     font-size: 1em;
 }
diff --git a/ext/data/schemas/dictionary-term-bank-v3-schema.json b/ext/data/schemas/dictionary-term-bank-v3-schema.json
index 9003cbf3..fd3f3844 100644
--- a/ext/data/schemas/dictionary-term-bank-v3-schema.json
+++ b/ext/data/schemas/dictionary-term-bank-v3-schema.json
@@ -70,6 +70,23 @@
                                     "description": "Whether or not the image should appear pixelated at sizes larger than the image's native resolution.",
                                     "default": false
                                 },
+                                "imageRendering": {
+                                    "type": "string",
+                                    "description": "Controls how the image is rendered. The value of this field supersedes the pixelated field.",
+                                    "enum": ["auto", "pixelated", "crisp-edges"],
+                                    "default": "auto"
+                                },
+                                "appearance": {
+                                    "type": "string",
+                                    "description": "Controls the appearance of the image. The \"monochrome\" value will mask the opaque parts of the image using the current text color.",
+                                    "enum": ["auto", "monochrome"],
+                                    "default": "auto"
+                                },
+                                "background": {
+                                    "type": "boolean",
+                                    "description": "Whether or not a background color is displayed behind the image.",
+                                    "default": true
+                                },
                                 "collapsed": {
                                     "type": "boolean",
                                     "description": "Whether or not the image is collapsed by default.",
@@ -219,6 +236,23 @@
                                             "description": "Whether or not the image should appear pixelated at sizes larger than the image's native resolution.",
                                             "default": false
                                         },
+                                        "imageRendering": {
+                                            "type": "string",
+                                            "description": "Controls how the image is rendered. The value of this field supersedes the pixelated field.",
+                                            "enum": ["auto", "pixelated", "crisp-edges"],
+                                            "default": "auto"
+                                        },
+                                        "appearance": {
+                                            "type": "string",
+                                            "description": "Controls the appearance of the image. The \"monochrome\" value will mask the opaque parts of the image using the current text color.",
+                                            "enum": ["auto", "monochrome"],
+                                            "default": "auto"
+                                        },
+                                        "background": {
+                                            "type": "boolean",
+                                            "description": "Whether or not a background color is displayed behind the image.",
+                                            "default": true
+                                        },
                                         "collapsed": {
                                             "type": "boolean",
                                             "description": "Whether or not the image is collapsed by default.",
diff --git a/ext/display-templates.html b/ext/display-templates.html
index 61d55638..0ad02748 100644
--- a/ext/display-templates.html
+++ b/ext/display-templates.html
@@ -57,7 +57,15 @@
 </li></template>
 <template id="definition-disambiguation-template"><span class="definition-disambiguation"></span></template>
 <template id="gloss-item-template"><li class="gloss-item click-scannable"><span class="gloss-separator"> </span><span class="gloss-content"></span></li></template>
-<template id="gloss-item-image-template"><a class="gloss-image-link" target="_blank" rel="noreferrer noopener"><span class="gloss-image-container"><span class="gloss-image-aspect-ratio-sizer"></span><img class="gloss-image" alt=""><span class="gloss-image-container-overlay"></span></span><span class="gloss-image-link-text">Image</span></a></template>
+<template id="gloss-item-image-template" data-remove-whitespace-text="true"><a class="gloss-image-link" target="_blank" rel="noreferrer noopener">
+    <span class="gloss-image-container">
+        <span class="gloss-image-aspect-ratio-sizer"></span>
+        <span class="gloss-image-background icon"></span>
+        <img class="gloss-image" alt="">
+        <span class="gloss-image-container-overlay"></span>
+    </span>
+    <span class="gloss-image-link-text">Image</span>
+</a></template>
 <template id="gloss-item-image-description-template"> <span class="gloss-image-description"></span></template>
 <template id="inflection-template"><span class="inflection"></span><span class="inflection-separator"> </span></template>
 
diff --git a/ext/js/display/display-generator.js b/ext/js/display/display-generator.js
index 484dc6a9..6a5b26f1 100644
--- a/ext/js/display/display-generator.js
+++ b/ext/js/display/display-generator.js
@@ -340,7 +340,22 @@ class DisplayGenerator {
     }
 
     _createDefinitionImage(data, dictionary) {
-        const {path, width, height, preferredWidth, preferredHeight, title, pixelated, collapsed, collapsible, verticalAlign, sizeUnits} = data;
+        const {
+            path,
+            width,
+            height,
+            preferredWidth,
+            preferredHeight,
+            title,
+            pixelated,
+            imageRendering,
+            appearance,
+            background,
+            collapsed,
+            collapsible,
+            verticalAlign,
+            sizeUnits
+        } = data;
 
         const hasPreferredWidth = (typeof preferredWidth === 'number');
         const hasPreferredHeight = (typeof preferredHeight === 'number');
@@ -356,10 +371,18 @@ class DisplayGenerator {
         );
 
         const node = this._templates.instantiate('gloss-item-image');
+        const imageContainer = node.querySelector('.gloss-image-container');
+        const aspectRatioSizer = node.querySelector('.gloss-image-aspect-ratio-sizer');
+        const image = node.querySelector('.gloss-image');
+        const imageBackground = node.querySelector('.gloss-image-background');
+
         node.dataset.path = path;
         node.dataset.dictionary = dictionary;
         node.dataset.imageLoadState = 'not-loaded';
         node.dataset.hasAspectRatio = 'true';
+        node.dataset.imageRendering = typeof imageRendering === 'string' ? imageRendering : (pixelated ? 'pixelated' : 'auto');
+        node.dataset.appearance = typeof appearance === 'string' ? appearance : 'auto';
+        node.dataset.background = typeof background === 'boolean' ? `${background}` : 'true';
         node.dataset.collapsed = typeof collapsed === 'boolean' ? `${collapsed}` : 'false';
         node.dataset.collapsible = typeof collapsible === 'boolean' ? `${collapsible}` : 'true';
         if (typeof verticalAlign === 'string') {
@@ -369,39 +392,36 @@ class DisplayGenerator {
             node.dataset.sizeUnits = sizeUnits;
         }
 
-        const imageContainer = node.querySelector('.gloss-image-container');
         imageContainer.style.width = `${usedWidth}em`;
         if (typeof title === 'string') {
             imageContainer.title = title;
         }
 
-        const aspectRatioSizer = node.querySelector('.gloss-image-aspect-ratio-sizer');
         aspectRatioSizer.style.paddingTop = `${aspectRatio * 100.0}%`;
 
-        const image = node.querySelector('img.gloss-image');
-        image.dataset.pixelated = `${pixelated === true}`;
-
         if (this._mediaLoader !== null) {
             this._mediaLoader.loadMedia(
                 path,
                 dictionary,
-                (url) => this._setImageData(node, image, url, false),
-                () => this._setImageData(node, image, null, true)
+                (url) => this._setImageData(node, image, imageBackground, url, false),
+                () => this._setImageData(node, image, imageBackground, null, true)
             );
         }
 
         return node;
     }
 
-    _setImageData(node, image, url, unloaded) {
+    _setImageData(node, image, imageBackground, url, unloaded) {
         if (url !== null) {
             image.src = url;
             node.href = url;
             node.dataset.imageLoadState = 'loaded';
+            imageBackground.style.setProperty('--image', `url("${url}")`);
         } else {
             image.removeAttribute('src');
             node.removeAttribute('href');
             node.dataset.imageLoadState = unloaded ? 'unloaded' : 'load-error';
+            imageBackground.style.removeProperty('--image');
         }
     }
 
diff --git a/ext/js/display/display.js b/ext/js/display/display.js
index ccca8229..26c1e06c 100644
--- a/ext/js/display/display.js
+++ b/ext/js/display/display.js
@@ -208,6 +208,10 @@ class Display extends EventDispatcher {
         const {browser} = await yomichan.api.getEnvironmentInfo();
         this._browser = browser;
 
+        if (documentElement !== null) {
+            documentElement.dataset.browser = browser;
+        }
+
         // Prepare
         await this._hotkeyHelpController.prepare();
         await this._displayGenerator.prepare();
diff --git a/ext/js/language/dictionary-importer.js b/ext/js/language/dictionary-importer.js
index a0806a3a..b735953a 100644
--- a/ext/js/language/dictionary-importer.js
+++ b/ext/js/language/dictionary-importer.js
@@ -361,7 +361,19 @@ class DictionaryImporter {
     }
 
     async _createImageData(data, context, entry, attributes) {
-        const {path, width: preferredWidth, height: preferredHeight, title, description, pixelated, collapsed, collapsible} = data;
+        const {
+            path,
+            width: preferredWidth,
+            height: preferredHeight,
+            title,
+            description,
+            pixelated,
+            imageRendering,
+            appearance,
+            background,
+            collapsed,
+            collapsible
+        } = data;
         const {width, height} = await this._getImageMedia(path, context, entry);
         const newData = Object.assign({}, attributes, {path, width, height});
         if (typeof preferredWidth === 'number') { newData.preferredWidth = preferredWidth; }
@@ -369,6 +381,9 @@ class DictionaryImporter {
         if (typeof title === 'string') { newData.title = title; }
         if (typeof description === 'string') { newData.description = description; }
         if (typeof pixelated === 'boolean') { newData.pixelated = pixelated; }
+        if (typeof imageRendering === 'string') { newData.imageRendering = imageRendering; }
+        if (typeof appearance === 'string') { newData.appearance = appearance; }
+        if (typeof background === 'boolean') { newData.background = background; }
         if (typeof collapsed === 'boolean') { newData.collapsed = collapsed; }
         if (typeof collapsible === 'boolean') { newData.collapsible = collapsible; }
         return newData;
diff --git a/test/data/dictionaries/valid-dictionary1/character.gif b/test/data/dictionaries/valid-dictionary1/character.gif
new file mode 100644
index 00000000..9d5edad8
--- /dev/null
+++ b/test/data/dictionaries/valid-dictionary1/character.gif
diff --git a/test/data/dictionaries/valid-dictionary1/term_bank_1.json b/test/data/dictionaries/valid-dictionary1/term_bank_1.json
index 0df04ef0..1ba70c26 100644
--- a/test/data/dictionaries/valid-dictionary1/term_bank_1.json
+++ b/test/data/dictionaries/valid-dictionary1/term_bank_1.json
@@ -36,6 +36,29 @@
                 "naiyou definition 6: ",
                 {"tag": "ruby", "content": ["内", {"tag": "rp", "content": "("}, {"tag": "rt", "content": "ない"}, {"tag": "rp", "content": ")"}]},
                 {"tag": "ruby", "content": ["容", {"tag": "rp", "content": "("}, {"tag": "rt", "content": "よう"}, {"tag": "rp", "content": ")"}]}
+            ]},
+            {"type": "structured-content", "content": [
+                "imageRendering=auto: ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "auto", "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢 ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "auto", "background": false, "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢 ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "auto", "background": false, "appearance": "monochrome", "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢\n",
+                "imageRendering=pixelated: ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "pixelated", "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢 ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "pixelated", "background": false, "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢 ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "pixelated", "background": false, "appearance": "monochrome", "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢\n",
+                "imageRendering=crisp-edges: ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "crisp-edges", "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢 ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "crisp-edges", "background": false, "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢 ",
+                {"tag": "img", "path": "character.gif", "width": 1, "height": 1, "imageRendering": "crisp-edges", "background": false, "appearance": "monochrome", "collapsible": false, "collapsed": false, "sizeUnits": "em"},
+                "莢\n"
             ]}
         ],
         9, "P E1"
diff --git a/test/test-database.js b/test/test-database.js
index e68a39ba..d4005364 100644
--- a/test/test-database.js
+++ b/test/test-database.js
@@ -162,8 +162,8 @@ async function testDatabase1() {
             true
         );
         vm.assert.deepStrictEqual(counts, {
-            counts: [{kanji: 2, kanjiMeta: 2, terms: 15, termMeta: 12, tagMeta: 15, media: 1}],
-            total: {kanji: 2, kanjiMeta: 2, terms: 15, termMeta: 12, tagMeta: 15, media: 1}
+            counts: [{kanji: 2, kanjiMeta: 2, terms: 15, termMeta: 12, tagMeta: 15, media: 2}],
+            total: {kanji: 2, kanjiMeta: 2, terms: 15, termMeta: 12, tagMeta: 15, media: 2}
         });
 
         // Test find* functions