1 files changed, 145 insertions, 0 deletions
diff --git a/platform/android/src/com/artifex/mupdfdemo/PrintDialogActivity.java b/platform/android/src/com/artifex/mupdfdemo/PrintDialogActivity.java
new file mode 100644
index 00000000..d96322d5
--- /dev/null
+++ b/platform/android/src/com/artifex/mupdfdemo/PrintDialogActivity.java
@@ -0,0 +1,145 @@
+package com.artifex.mupdfdemo;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+
+import android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.ContentResolver;
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Base64;
+import android.webkit.WebSettings;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+
+public class PrintDialogActivity extends Activity {
+	private static final String PRINT_DIALOG_URL = "https://www.google.com/cloudprint/dialog.html";
+	private static final String JS_INTERFACE = "AndroidPrintDialog";
+	private static final String CONTENT_TRANSFER_ENCODING = "base64";
+
+	private static final String ZXING_URL = "http://zxing.appspot.com";
+	private static final int ZXING_SCAN_REQUEST = 65743;
+
+	/**
+	 * Post message that is sent by Print Dialog web page when the printing dialog
+	 * needs to be closed.
+	 */
+	private static final String CLOSE_POST_MESSAGE_NAME = "cp-dialog-on-close";
+
+	/**
+	 * Web view element to show the printing dialog in.
+	 */
+	private WebView dialogWebView;
+
+	/**
+	 * Intent that started the action.
+	 */
+	Intent cloudPrintIntent;
+
+	private int resultCode;
+
+	@Override
+	public void onCreate(Bundle icicle) {
+		super.onCreate(icicle);
+
+		resultCode = RESULT_OK;
+		setContentView(R.layout.print_dialog);
+		dialogWebView = (WebView) findViewById(R.id.webview);
+		cloudPrintIntent = this.getIntent();
+
+		WebSettings settings = dialogWebView.getSettings();
+		settings.setJavaScriptEnabled(true);
+
+		dialogWebView.setWebViewClient(new PrintDialogWebClient());
+		dialogWebView.addJavascriptInterface(
+			new PrintDialogJavaScriptInterface(), JS_INTERFACE);
+
+		dialogWebView.loadUrl(PRINT_DIALOG_URL);
+	}
+
+	@Override
+	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
+		if (requestCode == ZXING_SCAN_REQUEST && resultCode == RESULT_OK) {
+			dialogWebView.loadUrl(intent.getStringExtra("SCAN_RESULT"));
+		}
+	}
+
+	final class PrintDialogJavaScriptInterface {
+		public String getType() {
+			return cloudPrintIntent.getType();
+		}
+
+		public String getTitle() {
+			return cloudPrintIntent.getExtras().getString("title");
+		}
+
+		public String getContent() {
+			try {
+				ContentResolver contentResolver = getContentResolver();
+				InputStream is = contentResolver.openInputStream(cloudPrintIntent.getData());
+				ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+				byte[] buffer = new byte[4096];
+				int n = is.read(buffer);
+				while (n >= 0) {
+					baos.write(buffer, 0, n);
+					n = is.read(buffer);
+				}
+				is.close();
+				baos.flush();
+
+				return Base64.encodeToString(baos.toByteArray(), Base64.DEFAULT);
+			} catch (Throwable e) {
+				resultCode = RESULT_CANCELED;
+				setResult(resultCode);
+				finish();
+				e.printStackTrace();
+			}
+			return "";
+		}
+
+		public String getEncoding() {
+			return CONTENT_TRANSFER_ENCODING;
+		}
+
+		public void onPostMessage(String message) {
+			if (message.startsWith(CLOSE_POST_MESSAGE_NAME)) {
+				setResult(resultCode);
+				finish();
+			}
+		}
+	}
+
+	private final class PrintDialogWebClient extends WebViewClient {
+		@Override
+		public boolean shouldOverrideUrlLoading(WebView view, String url) {
+			if (url.startsWith(ZXING_URL)) {
+				Intent intentScan = new Intent("com.google.zxing.client.android.SCAN");
+				intentScan.putExtra("SCAN_MODE", "QR_CODE_MODE");
+				try {
+					startActivityForResult(intentScan, ZXING_SCAN_REQUEST);
+				} catch (ActivityNotFoundException error) {
+					view.loadUrl(url);
+				}
+			} else {
+				view.loadUrl(url);
+			}
+			return false;
+		}
+
+		@Override
+		public void onPageFinished(WebView view, String url) {
+			if (PRINT_DIALOG_URL.equals(url)) {
+				// Submit print document.
+				view.loadUrl("javascript:printDialog.setPrintDocument(printDialog.createPrintDocument("
+					+ "window." + JS_INTERFACE + ".getType(),window." + JS_INTERFACE + ".getTitle(),"
+					+ "window." + JS_INTERFACE + ".getContent(),window." + JS_INTERFACE + ".getEncoding()))");
+
+				// Add post messages listener.
+				view.loadUrl("javascript:window.addEventListener('message',"
+						+ "function(evt){window." + JS_INTERFACE + ".onPostMessage(evt.data)}, false)");
+			}
+		}
+	}
+}