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feat: add syntax highlighting to visualizer artifacts #2

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Merged
akesling merged 1 commit into from
Feb 18, 2026
Merged

feat: add syntax highlighting to visualizer artifacts #2

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58 changes: 53 additions & 5 deletions site/css/visualizer.css
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Original file line number Diff line number Diff line change
Expand Up @@ -4,20 +4,54 @@
}

/* --- Input section --- */
.viz-editor {
position: relative;
background: var(--grain);
border: 1px solid var(--border);
}
.viz-editor:focus-within {
outline: 2px solid var(--copper);
outline-offset: -2px;
}
.viz-highlight {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin: 0;
font-family: var(--mono);
font-size: 0.8rem;
line-height: 1.5;
padding: 0.75rem 1rem;
overflow: hidden;
white-space: pre-wrap;
overflow-wrap: break-word;
pointer-events: none;
color: var(--graphite);
}
.viz-textarea {
width: 100%;
font-family: var(--mono);
font-size: 0.8rem;
line-height: 1.5;
background: var(--grain);
border: 1px solid var(--border);
color: var(--graphite);
background: transparent;
border: none;
color: transparent;
caret-color: var(--graphite);
padding: 0.75rem 1rem;
resize: vertical;
position: relative;
z-index: 1;
}
.viz-textarea:focus {
outline: 2px solid var(--copper);
outline-offset: -2px;
outline: none;
}
.viz-textarea::selection {
background: #b5652b30;
}
.viz-textarea::placeholder {
color: var(--pencil);
}

.viz-buttons {
Expand Down Expand Up @@ -209,6 +243,20 @@
word-break: break-all;
margin: 0.5rem 0;
}

/* Diff line backgrounds */
.viz-detail-body .token.inserted {
display: block;
background: #6e7d3a12;
}
.viz-detail-body .token.deleted {
display: block;
background: #c4403010;
}
.viz-detail-body .token.coord {
color: #8a8078;
font-style: italic;
}
.viz-detail-body .detail-section {
margin-bottom: 1rem;
}
Expand Down
40 changes: 37 additions & 3 deletions site/js/visualizer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,7 @@

// --- DOM refs ---
var input = document.getElementById("viz-input");
var highlight = document.getElementById("viz-highlight");
var fileInput = document.getElementById("viz-file");
var exampleBtn = document.getElementById("viz-example");
var renderBtn = document.getElementById("viz-render");
Expand Down Expand Up @@ -689,12 +690,20 @@
);
var ch = step.change[f];
if (ch.raw) {
html.push("<pre>" + escapeHtml(ch.raw) + "</pre>");
html.push(
"<pre>" +
Prism.highlight(ch.raw, Prism.languages.diff, "diff") +
"</pre>",
);
}
if (ch.structural) {
html.push(
"<pre>" +
escapeHtml(JSON.stringify(ch.structural, null, 2)) +
Prism.highlight(
JSON.stringify(ch.structural, null, 2),
Prism.languages.json,
"json",
) +
"</pre>",
);
}
Expand All @@ -705,7 +714,15 @@
// Full JSON
html.push('<div class="detail-section">');
html.push('<div class="detail-label">Raw JSON</div>');
html.push("<pre>" + escapeHtml(JSON.stringify(step, null, 2)) + "</pre>");
html.push(
"<pre>" +
Prism.highlight(
JSON.stringify(step, null, 2),
Prism.languages.json,
"json",
) +
"</pre>",
);
html.push("</div>");

detailBody.innerHTML = html.join("");
Expand Down Expand Up @@ -784,11 +801,26 @@
errorBox.hidden = true;
}

// --- Input highlight sync ---
function syncHighlight() {
var code = input.value;
highlight.innerHTML = code
? Prism.highlight(code, Prism.languages.json, "json")
: "";
highlight.scrollTop = input.scrollTop;
}

input.addEventListener("input", syncHighlight);
input.addEventListener("scroll", function () {
highlight.scrollTop = input.scrollTop;
});

// --- Event wiring ---
renderBtn.addEventListener("click", render);

exampleBtn.addEventListener("click", function () {
input.value = JSON.stringify(DEFAULT_EXAMPLE, null, 2);
syncHighlight();
render();
});

Expand All @@ -798,6 +830,7 @@
var reader = new FileReader();
reader.onload = function () {
input.value = reader.result;
syncHighlight();
render();
};
reader.readAsText(file);
Expand Down Expand Up @@ -839,5 +872,6 @@

// --- Auto-load example on page load ---
input.value = JSON.stringify(DEFAULT_EXAMPLE, null, 2);
syncHighlight();
render();
})();
10 changes: 8 additions & 2 deletions site/pages/visualizer.njk
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,11 @@ permalink: /visualizer/
<div class="viz-layout">
<div class="viz-input-section">
<div class="viz-input-row">
<textarea id="viz-input" class="viz-textarea" rows="6" spellcheck="false"
placeholder="Paste a Toolpath JSON document (Step, Path, or Graph)..."></textarea>
<div class="viz-editor">
<pre id="viz-highlight" class="viz-highlight" aria-hidden="true"></pre>
<textarea id="viz-input" class="viz-textarea" rows="6" spellcheck="false"
placeholder="Paste a Toolpath JSON document (Step, Path, or Graph)..."></textarea>
</div>
</div>
<div class="viz-buttons">
<label class="viz-btn viz-btn-file">
Expand Down Expand Up @@ -66,5 +69,8 @@ permalink: /visualizer/

<script src="https://d3js.org/d3.v7.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dagre-d3/0.6.4/dagre-d3.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/prismjs@1/prism.min.js" data-manual></script>
<script src="https://cdn.jsdelivr.net/npm/prismjs@1/components/prism-json.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/prismjs@1/components/prism-diff.min.js"></script>
<script src="/js/toolpath-core.js"></script>
<script src="/js/visualizer.js"></script>