add pdf watermark tool

src/tools/pdf-watermark/index.ts

@@ -0,0 +1,80 @@
+import type { PlimiPlugin } from "../../core/plugins/plugin-types";
+import { runPdfWatermark } from "./run";
+import { COLOR_PRESETS, MAX_WATERMARK_CHARS } from "./watermark";
+import PdfWorker from "./worker?worker";
+
+export interface PdfWatermarkOptions {
+  text: string;
+  orientation: "horizontal" | "vertical" | "diagonal";
+  opacity: number;
+  color: string;
+}
+
+export const pdfWatermarkPlugin: PlimiPlugin<PdfWatermarkOptions> = {
+  manifest: {
+    id: "pdf-watermark",
+    name: "PDF Watermark",
+    description:
+      "Stamp custom text over every page of a PDF, entirely in your browser. The text auto-sizes to fit each page.",
+    category: "pdf",
+    version: "1.0.0",
+    tags: ["pdf", "watermark", "stamp", "text"],
+    input: {
+      type: "files",
+      accept: ["application/pdf"],
+      multiple: false,
+    },
+    output: { type: "files" },
+    offlineReady: true,
+  },
+
+  optionsSchema: {
+    fields: [
+      {
+        type: "text",
+        key: "text",
+        label: `Watermark Text (max ${MAX_WATERMARK_CHARS} chars)`,
+        defaultValue: "CONFIDENTIAL",
+        placeholder: "e.g. CONFIDENTIAL",
+      },
+      {
+        type: "select",
+        key: "orientation",
+        label: "Orientation",
+        defaultValue: "diagonal",
+        options: [
+          { label: "Diagonal", value: "diagonal" },
+          { label: "Horizontal", value: "horizontal" },
+          { label: "Vertical", value: "vertical" },
+        ],
+      },
+      {
+        type: "slider",
+        key: "opacity",
+        label: "Opacity (%)",
+        defaultValue: 30,
+        min: 5,
+        max: 100,
+        step: 5,
+      },
+      {
+        type: "select",
+        key: "color",
+        label: "Color",
+        defaultValue: "light-grey",
+        options: Object.entries(COLOR_PRESETS).map(([value, { label }]) => ({
+          label,
+          value,
+        })),
+      },
+    ],
+  },
+
+  capabilities: {
+    cancelable: true,
+    worker: true,
+  },
+
+  run: runPdfWatermark,
+  worker: () => new PdfWorker(),
+};