Add support for accent graph

ext/mixed/css/display-dark.css

@@ -78,3 +78,16 @@ h2 { border-bottom-color: #2f2f2f; }
 }
 
 .term-pitch-accent-character:before { border-color: #ffffff; }
+
+.term-pitch-accent-graph-line,
+.term-pitch-accent-graph-line-tail,
+#term-pitch-accent-graph-dot,
+#term-pitch-accent-graph-dot-downstep,
+#term-pitch-accent-graph-triangle {
+    stroke: #ffffff;
+}
+
+#term-pitch-accent-graph-dot,
+#term-pitch-accent-graph-dot-downstep>circle:last-of-type {
+    fill: #ffffff;
+}

ext/mixed/css/display-default.css

@@ -78,3 +78,16 @@ h2 { border-bottom-color: #eeeeee; }
 }
 
 .term-pitch-accent-character:before { border-color: #000000; }
+
+.term-pitch-accent-graph-line,
+.term-pitch-accent-graph-line-tail,
+#term-pitch-accent-graph-dot,
+#term-pitch-accent-graph-dot-downstep,
+#term-pitch-accent-graph-triangle {
+    stroke: #000000;
+}
+
+#term-pitch-accent-graph-dot,
+#term-pitch-accent-graph-dot-downstep>circle:last-of-type {
+    fill: #000000;
+}

ext/mixed/css/display.css

@@ -537,6 +537,44 @@ button.action-button {
 }
 
 
+/*
+ * Pitch accent graph styles
+ */
+
+.term-pitch-accent-graph {
+    display: block;
+    height: 1.5em;
+    transform: translateY(-0.875em);
+}
+.term-pitch-accent-graph-line,
+.term-pitch-accent-graph-line-tail {
+    fill: none;
+    stroke: #000000;
+    stroke-width: 5;
+}
+.term-pitch-accent-graph-line-tail {
+    stroke-dasharray: 5 5;
+}
+#term-pitch-accent-graph-dot {
+    fill: #000000;
+    stroke: #000000;
+    stroke-width: 5;
+}
+#term-pitch-accent-graph-dot-downstep {
+    fill: none;
+    stroke: #000000;
+    stroke-width: 5;
+}
+#term-pitch-accent-graph-dot-downstep>circle:last-of-type {
+    fill: #000000;
+}
+#term-pitch-accent-graph-triangle {
+    fill: none;
+    stroke: #000000;
+    stroke-width: 5;
+}
+
+
 /*
  * Kanji
  */

ext/mixed/display-templates.html

@@ -37,9 +37,16 @@
 <template id="term-glossary-item-template"><li class="term-glossary-item"><span class="term-glossary-separator"> </span><span class="term-glossary"></span></li></template>
 <template id="term-reason-template"><span class="term-reason"></span><span class="term-reason-separator"> </span></template>
 
+<template id="term-pitch-accent-static-template"><svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
+    <defs>
+        <g id="term-pitch-accent-graph-dot"><circle cx="0" cy="0" r="15" /></g>
+        <g id="term-pitch-accent-graph-dot-downstep"><circle cx="0" cy="0" r="15" /><circle cx="0" cy="0" r="5" /></g>
+        <g id="term-pitch-accent-graph-triangle"><path d="M0 13 L15 -13 L-15 -13 Z" /></g>
+    </defs>
+</svg></template>
 <template id="term-pitch-accent-group-template"><li class="term-pitch-accent-group"><span class="term-pitch-accent-group-tag-list tag-list"></span><ul class="term-pitch-accent-list"></ul></li></template>
 <template id="term-pitch-accent-expression-template"><span class="term-pitch-accent-expression"></span></template>
-<template id="term-pitch-accent-template"><li class="term-pitch-accent"><span class="term-pitch-accent-tag-list tag-list"></span><span class="term-pitch-accent-expression-list"></span><span class="term-pitch-accent-characters"></span><span class="term-pitch-accent-position"></span></li></template>
+<template id="term-pitch-accent-template"><li class="term-pitch-accent"><span class="term-pitch-accent-tag-list tag-list"></span><span class="term-pitch-accent-expression-list"></span><span class="term-pitch-accent-characters"></span><span class="term-pitch-accent-position"></span><span class="term-pitch-accent-details"><svg class="term-pitch-accent-graph" xmlns="http://www.w3.org/2000/svg"><path class="term-pitch-accent-graph-line" /><path class="term-pitch-accent-graph-line-tail" /></svg></span></li></template>
 <template id="term-pitch-accent-character-template"><span class="term-pitch-accent-character"><span class="term-pitch-accent-character-inner"></span></span></template>
 
 <template id="kanji-entry-template"><div class="entry" data-type="kanji">

ext/mixed/js/display-generator.js

@@ -25,6 +25,7 @@
 class DisplayGenerator {
     constructor() {
         this._templateHandler = null;
+        this._termPitchAccentStaticTemplateIsSetup = false;
     }
 
     async prepare() {
@@ -337,6 +338,10 @@ class DisplayGenerator {
             n.appendChild(n1);
         }
 
+        if (morae.length > 0) {
+            this.populatePitchGraph(node.querySelector('.term-pitch-accent-graph'), position, morae);
+        }
+
         return node;
     }
 
@@ -346,6 +351,46 @@ class DisplayGenerator {
         return node;
     }
 
+    populatePitchGraph(svg, position, morae) {
+        const svgns = svg.getAttribute('xmlns');
+        const ii = morae.length;
+        svg.setAttribute('viewBox', `0 0 ${50 * (ii + 1)} 100`);
+
+        const pathPoints = [];
+        for (let i = 0; i < ii; ++i) {
+            const highPitch = DisplayGenerator._jpIsMoraPitchHigh(i, position);
+            const highPitchNext = DisplayGenerator._jpIsMoraPitchHigh(i + 1, position);
+            const graphic = (highPitch && !highPitchNext ? '#term-pitch-accent-graph-dot-downstep' : '#term-pitch-accent-graph-dot');
+            const x = `${i * 50 + 25}`;
+            const y = highPitch ? '25' : '75';
+            const use = document.createElementNS(svgns, 'use');
+            use.setAttribute('href', graphic);
+            use.setAttribute('x', x);
+            use.setAttribute('y', y);
+            svg.appendChild(use);
+            pathPoints.push(`${x} ${y}`);
+        }
+
+        let path = svg.querySelector('.term-pitch-accent-graph-line');
+        path.setAttribute('d', `M${pathPoints.join(' L')}`);
+
+        pathPoints.splice(0, ii - 1);
+        {
+            const highPitch = DisplayGenerator._jpIsMoraPitchHigh(ii, position);
+            const x = `${ii * 50 + 25}`;
+            const y = highPitch ? '25' : '75';
+            const use = document.createElementNS(svgns, 'use');
+            use.setAttribute('href', '#term-pitch-accent-graph-triangle');
+            use.setAttribute('x', x);
+            use.setAttribute('y', y);
+            svg.appendChild(use);
+            pathPoints.push(`${x} ${y}`);
+        }
+
+        path = svg.querySelector('.term-pitch-accent-graph-line-tail');
+        path.setAttribute('d', `M${pathPoints.join(' L')}`);
+    }
+
     createFrequencyTag(details) {
         const node = this._templateHandler.instantiate('tag-frequency');