Code — Diff Review

Installation

Variants

Schema

Type aliases exported from this item's source. Use these to shape the data you pass in.

interface DiffLine {
  old: number | null
  new: number | null
  tone: DiffTone
  text: string
}

Files installed (2)

• src/app/components/blocks/code-diff-review/code-diff-review.component.ts6.4 kB

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  // Unified diff panel with added and removed lines, a file path header, a reviewer note
  // anchored to a line, and a summary bar counting the changes. Port of the React block 1:1.
  import { ChangeDetectionStrategy, Component, Input, computed } from '@angular/core'
  import { Check, FileDiff, LucideAngularModule, MessageSquare } from 'lucide-angular'
  import { cn } from '@/lib/utils'
  import { UiAvatarComponent, UiAvatarFallbackComponent } from '@/ui/avatar/avatar.component'
  import { UiBadgeComponent } from '@/ui/badge/badge.component'
  import { UiButtonComponent } from '@/ui/button/button.component'
  import { UiCardComponent, UiCardContentComponent } from '@/ui/card/card.component'
  import { UiSeparatorComponent } from '@/ui/separator/separator.component'
  
  type DiffTone = 'same' | 'add' | 'remove'
  
  interface DiffLine {
    old: number | null
    new: number | null
    tone: DiffTone
    text: string
  }
  
  // tone drives the row treatment, so individual lines carry no styling of their own.
  const hunk: DiffLine[] = [
    { old: 12, new: 12, tone: 'same', text: 'metric revenue_net {' },
    { old: 13, new: 13, tone: 'same', text: '  owner: finance-analytics' },
    { old: 14, new: null, tone: 'remove', text: '  window: trailing_30d' },
    { old: null, new: 14, tone: 'add', text: '  window: trailing_28d' },
    { old: null, new: 15, tone: 'add', text: '  restated_from: 2026-01-01' },
    { old: 15, new: 16, tone: 'same', text: '  source: warehouse.orders' },
    { old: 16, new: 17, tone: 'same', text: '}' },
  ]
  
  @Component({
    changeDetection: ChangeDetectionStrategy.Eager,
    selector: 'ui-code-diff-review, [ui-code-diff-review]',
    standalone: true,
    // React renders the root <section> itself: the host stays out of layout and `class` goes to the root.
    host: { '[attr.class]': '"contents"' },
    imports: [
      LucideAngularModule,
      UiAvatarComponent,
      UiAvatarFallbackComponent,
      UiBadgeComponent,
      UiButtonComponent,
      UiCardComponent,
      UiCardContentComponent,
      UiSeparatorComponent,
    ],
    template: `
      <section data-slot="code-diff-review" class="bg-background">
        <div class="mx-auto max-w-3xl px-6 py-20">
          <span ui-badge variant="secondary" class="gap-1.5">
            <lucide-icon [img]="FileDiff" class="size-3" aria-hidden="true" />
            Change review
          </span>
          <h2 class="mt-4 text-2xl font-semibold tracking-tight">Every metric change is a reviewable diff</h2>
          <p class="text-muted-foreground mt-2">
            Definitions live in the repo, so changing one opens a pull request with an owner and a revert path.
          </p>
  
          <div ui-card class="mt-8">
            <div ui-card-content class="p-0">
              <div class="border-border flex items-center gap-3 border-b px-4 py-2.5">
                <code class="min-w-0 truncate font-mono text-xs">metrics/revenue_net.yml</code>
                <div class="ml-auto flex shrink-0 items-center gap-2 font-mono text-xs">
                  <span class="text-success">+{{ added() }}</span>
                  <span class="text-destructive">−{{ removed() }}</span>
                </div>
              </div>
  
              <div class="overflow-x-auto">
                <table class="w-full border-collapse font-mono text-xs">
                  <caption class="sr-only">
                    Unified diff for metrics/revenue_net.yml
                  </caption>
                  <tbody>
                    @for (line of lines; track line.text; let i = $index) {
                      <tr [class]="rowClass(line.tone)">
                        <td class="text-muted-foreground/60 w-10 px-2 py-1 text-right select-none">
                          {{ line.old ?? '' }}
                        </td>
                        <td class="text-muted-foreground/60 w-10 px-2 py-1 text-right select-none">
                          {{ line.new ?? '' }}
                        </td>
                        <td class="w-4 py-1 pl-2 select-none">{{ marker(line.tone) }}</td>
                        <td class="py-1 pr-4 whitespace-pre">{{ line.text }}</td>
                      </tr>
                    }
                  </tbody>
                </table>
              </div>
  
              <ui-separator />
  
              <div class="flex items-start gap-3 px-4 py-3">
                <ui-avatar class="size-7">
                  <ui-avatar-fallback class="text-xs">EW</ui-avatar-fallback>
                </ui-avatar>
                <div class="min-w-0">
                  <p class="text-xs">
                    <span class="font-medium">Erin Walsh</span>
                    <span class="text-muted-foreground"> on line 14</span>
                  </p>
                  <p class="text-muted-foreground mt-1 text-xs leading-relaxed">
                    Restating from January means Q1 reports change. Flag it in the release note before this merges.
                  </p>
                </div>
                <button ui-button variant="ghost" size="sm" class="ml-auto h-7 shrink-0 gap-1.5 text-xs">
                  <lucide-icon [img]="MessageSquare" class="size-3" aria-hidden="true" />
                  Reply
                </button>
              </div>
            </div>
          </div>
  
          <div class="text-muted-foreground mt-4 flex flex-wrap items-center gap-x-5 gap-y-2 text-xs">
            <span class="flex items-center gap-1.5">
              <lucide-icon [img]="Check" class="text-success size-3.5" aria-hidden="true" />
              Reconciliation passed against the prior four quarters
            </span>
            <span class="flex items-center gap-1.5">
              <lucide-icon [img]="Check" class="text-success size-3.5" aria-hidden="true" />
              41 downstream consumers identified
            </span>
          </div>
        </div>
      </section>
    `,
  })
  export class UiCodeDiffReviewComponent {
    protected readonly Check = Check
    protected readonly FileDiff = FileDiff
    protected readonly MessageSquare = MessageSquare
  
    protected readonly lines = hunk
  
    @Input('class') className?: string
  
    readonly added = computed(() => hunk.filter((line) => line.tone === 'add').length)
    readonly removed = computed(() => hunk.filter((line) => line.tone === 'remove').length)
  
    get rootClass(): string {
      return cn('w-full', this.className)
    }
  
    rowClass(tone: DiffTone): string {
      if (tone === 'add') return 'bg-success/10 text-foreground'
      if (tone === 'remove') return 'bg-destructive/10 text-muted-foreground'
      return 'text-muted-foreground'
    }
  
    marker(tone: DiffTone): string {
      return tone === 'add' ? '+' : tone === 'remove' ? '-' : ' '
    }
  }
  

• src/app/components/blocks/code-diff-review/index.ts0.1 kB

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Raw manifest:https://uipkge.dev/r/angular/code-diff-review.json