From ee7612a31c02ea442d8bf3e5d3b75ff572fac26a Mon Sep 17 00:00:00 2001
From: Adam <2363879+adamdotdevin@users.noreply.github.com>
Date: Thu, 30 Oct 2025 12:02:44 -0500
Subject: wip: desktop work

---
 packages/ui/src/components/diff-changes.tsx | 110 ++++++++++++++++++++++++++--
 1 file changed, 104 insertions(+), 6 deletions(-)

(limited to 'packages/ui/src/components/diff-changes.tsx')

diff --git a/packages/ui/src/components/diff-changes.tsx b/packages/ui/src/components/diff-changes.tsx
index 7661a9741..433c47f39 100644
--- a/packages/ui/src/components/diff-changes.tsx
+++ b/packages/ui/src/components/diff-changes.tsx
@@ -1,7 +1,9 @@
 import type { FileDiff } from "@opencode-ai/sdk"
-import { createMemo, Show } from "solid-js"
+import { createMemo, For, Match, Show, Switch } from "solid-js"
+
+export function DiffChanges(props: { diff: FileDiff | FileDiff[]; variant?: "default" | "bars" }) {
+  const variant = () => props.variant ?? "default"
 
-export function DiffChanges(props: { diff: FileDiff | FileDiff[] }) {
   const additions = createMemo(() =>
     Array.isArray(props.diff)
       ? props.diff.reduce((acc, diff) => acc + (diff.additions ?? 0), 0)
@@ -13,11 +15,107 @@ export function DiffChanges(props: { diff: FileDiff | FileDiff[] }) {
       : props.diff.deletions,
   )
   const total = createMemo(() => (additions() ?? 0) + (deletions() ?? 0))
+
+  const countLines = (text: string) => {
+    if (!text) return 0
+    return text.split("\n").length
+  }
+
+  const totalBeforeLines = createMemo(() => {
+    if (!Array.isArray(props.diff)) return countLines(props.diff.before || "")
+    return props.diff.reduce((acc, diff) => acc + countLines(diff.before || ""), 0)
+  })
+
+  const blockCounts = createMemo(() => {
+    const TOTAL_BLOCKS = 5
+
+    const adds = additions() ?? 0
+    const dels = deletions() ?? 0
+
+    if (adds === 0 && dels === 0) {
+      return { added: 0, deleted: 0, neutral: TOTAL_BLOCKS }
+    }
+
+    const total = adds + dels
+
+    if (total < 5) {
+      const added = adds > 0 ? 1 : 0
+      const deleted = dels > 0 ? 1 : 0
+      const neutral = TOTAL_BLOCKS - added - deleted
+      return { added, deleted, neutral }
+    }
+
+    const ratio = adds > dels ? adds / dels : dels / adds
+    let BLOCKS_FOR_COLORS = TOTAL_BLOCKS
+
+    if (total < 20) {
+      BLOCKS_FOR_COLORS = TOTAL_BLOCKS - 1
+    } else if (ratio < 4) {
+      BLOCKS_FOR_COLORS = TOTAL_BLOCKS - 1
+    }
+
+    const percentAdded = adds / total
+    const percentDeleted = dels / total
+
+    const added_raw = percentAdded * BLOCKS_FOR_COLORS
+    const deleted_raw = percentDeleted * BLOCKS_FOR_COLORS
+
+    let added = adds > 0 ? Math.max(1, Math.round(added_raw)) : 0
+    let deleted = dels > 0 ? Math.max(1, Math.round(deleted_raw)) : 0
+
+    // Cap bars based on actual change magnitude
+    if (adds > 0 && adds <= 5) added = Math.min(added, 1)
+    if (adds > 5 && adds <= 10) added = Math.min(added, 2)
+    if (dels > 0 && dels <= 5) deleted = Math.min(deleted, 1)
+    if (dels > 5 && dels <= 10) deleted = Math.min(deleted, 2)
+
+    let total_allocated = added + deleted
+    if (total_allocated > BLOCKS_FOR_COLORS) {
+      if (added_raw > deleted_raw) {
+        added = BLOCKS_FOR_COLORS - deleted
+      } else {
+        deleted = BLOCKS_FOR_COLORS - added
+      }
+      total_allocated = added + deleted
+    }
+
+    const neutral = Math.max(0, TOTAL_BLOCKS - total_allocated)
+
+    return { added, deleted, neutral }
+  })
+
+  const ADD_COLOR = "var(--icon-diff-add-base)"
+  const DELETE_COLOR = "var(--icon-diff-delete-base)"
+  const NEUTRAL_COLOR = "var(--icon-weak-base)"
+
+  const visibleBlocks = createMemo(() => {
+    const counts = blockCounts()
+    const blocks = [
+      ...Array(counts.added).fill(ADD_COLOR),
+      ...Array(counts.deleted).fill(DELETE_COLOR),
+      ...Array(counts.neutral).fill(NEUTRAL_COLOR),
+    ]
+    return blocks.slice(0, 5)
+  })
+
   return (
-    <Show when={total() > 0}>
-      <div data-component="diff-changes">
-        <span data-slot="additions">{`+${additions()}`}</span>
-        <span data-slot="deletions">{`-${deletions()}`}</span>
+    <Show when={variant() === "default" ? total() > 0 : true}>
+      <div data-component="diff-changes" data-variant={variant()}>
+        <Switch>
+          <Match when={variant() === "bars"}>
+            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 12" fill="none">
+              <g>
+                <For each={visibleBlocks()}>
+                  {(color, i) => <rect x={i() * 4} width="2" height="12" rx="1" fill={color} />}
+                </For>
+              </g>
+            </svg>
+          </Match>
+          <Match when={variant() === "default"}>
+            <span data-slot="additions">{`+${additions()}`}</span>
+            <span data-slot="deletions">{`-${deletions()}`}</span>
+          </Match>
+        </Switch>
       </div>
     </Show>
   )
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