Initial Commit

2024-01-31 17:57:16 +05:30
commit 734726fc12
687 changed files with 189411 additions and 0 deletions
@@ -0,0 +1,63 @@
+const PACKETS = {
+    DOCUMENT_START: 0,
+    DOCUMENT_CHUNK: 1,
+    DOCUMENT_END: 2
+};
+
+const printDocument = async (data) => {
+    const iframe = document.createElement("iframe");
+    iframe.style.display = "none";
+    document.body.appendChild(iframe);
+
+    iframe.onload = () => {
+        setTimeout(() => {
+            iframe.focus();
+            iframe.contentWindow.print();
+        }, 1);
+    };
+
+    const blob = new Blob([new Uint8Array(data)], { type: "application/pdf" });
+    iframe.src = URL.createObjectURL(blob);
+}
+
+export default (rfb) => {
+    let documentSize = 0;
+    let downloadedSize = 0;
+    let documentData = [];
+
+    const processRelayData = (payload) => {
+        const array = Array.from(payload);
+        const buffer = new Uint8Array(array).buffer;
+        const packetData = new DataView(buffer);
+        const packetId = packetData.getUint32(0, false);
+
+        switch (packetId) {
+            case PACKETS.DOCUMENT_START:
+                documentSize = packetData.getUint32(4, false);
+                downloadedSize = 0;
+                console.log(`Downloading document for printing (${documentSize}B)`);
+                break;
+            
+            case PACKETS.DOCUMENT_CHUNK:
+                let chunkSize = packetData.getUint32(4, false);
+                let chunkData = new Uint8Array(buffer, 8);
+                downloadedSize += chunkSize;
+                documentData.push(...chunkData);
+                console.log(`Downloading document for printing (${downloadedSize}/${documentSize}B)`);
+                break;
+            
+            case PACKETS.DOCUMENT_END:
+                console.log(`Downloaded document for printing (${downloadedSize}/${documentSize}B)`);
+                printDocument(documentData);
+                downloadedSize = 0;
+                documentSize = 0;
+                break;
+
+            default:
+                console.error(`Unknown packet id: ${packetId}`);
+                break;
+        }
+    }
+
+    rfb.subscribeUnixRelay("printer", processRelayData);
+}