Implement window.print() on Android

printing/android/java/src/org/chromium/printing/PrintingControllerImpl.java

Index: printing/android/java/src/org/chromium/printing/PrintingControllerImpl.java
diff --git a/printing/android/java/src/org/chromium/printing/PrintingControllerImpl.java b/printing/android/java/src/org/chromium/printing/PrintingControllerImpl.java
index 16e045616abde9cf6d3c758e141c17de4e057b9a..55915e3a2b59646506d759821a3119c0ab7d4ee7 100644
--- a/printing/android/java/src/org/chromium/printing/PrintingControllerImpl.java
+++ b/printing/android/java/src/org/chromium/printing/PrintingControllerImpl.java
@@ -10,6 +10,7 @@ import android.os.ParcelFileDescriptor;
 import android.print.PageRange;
 import android.print.PrintAttributes;
 import android.print.PrintDocumentInfo;
+import android.util.Log;
 
 import org.chromium.base.ThreadUtils;
 import org.chromium.printing.PrintDocumentAdapterWrapper.PdfGenerator;
@@ -47,6 +48,12 @@ public class PrintingControllerImpl implements PrintingController, PdfGenerator
 
     private PrintingContextInterface mPrintingContext;
 
+    /**
+     * The context of a query initiated by window.print(), stored here to allow syncrhonization
+     * with javascript.
+     */
+    private PrintingContextInterface mContextFromScriptInitiation;
+
     /** The file descriptor into which the PDF will be written.  Provided by the framework. */
     private int mFileDescriptor;
 
@@ -86,6 +93,8 @@ public class PrintingControllerImpl implements PrintingController, PdfGenerator
 
     private boolean mIsBusy = false;
 
+    private PrintManagerDelegate mPrintManager;
+
     private PrintingControllerImpl(PrintDocumentAdapterWrapper printDocumentAdapterWrapper,
                                    String errorText) {
         mErrorMessage = errorText;
@@ -168,11 +177,30 @@ public class PrintingControllerImpl implements PrintingController, PdfGenerator
     }
 
     @Override
-    public void startPrint(final Printable printable, PrintManagerDelegate printManager) {
+    public void setPendingPrint(final Printable printable, PrintManagerDelegate printManager) {
         if (mIsBusy) return;
-        mIsBusy = true;
         mPrintable = printable;
-        mPrintDocumentAdapterWrapper.print(printManager, printable.getTitle());
+        mPrintManager = printManager;
+    }
+
+    @Override
+    public void startPendingPrint(PrintingContextInterface printingContext) {
+        if (mIsBusy || mPrintManager == null) {
+            Log.w(LOG_TAG, "Pending print can't be started. Is might be busy or not initialized.");
+            if (printingContext != null) printingContext.showSystemDialogDone();
+            return;
+        }
+        mContextFromScriptInitiation = printingContext;
+        mIsBusy = true;
+        mPrintDocumentAdapterWrapper.print(mPrintManager, mPrintable.getTitle());
+        mPrintManager = null;
+    }
+
+    @Override
+    public void startPrint(final Printable printable, PrintManagerDelegate printManager) {
+        if (mIsBusy) return;
+        setPendingPrint(printable, printManager);
+        startPendingPrint(null);
     }
 
     @Override
@@ -321,6 +349,12 @@ public class PrintingControllerImpl implements PrintingController, PdfGenerator
             mPrintingContext.updatePrintingContextMap(mFileDescriptor, true);
             mPrintingContext = null;
         }
+
+        if (mContextFromScriptInitiation != null) {
+            mContextFromScriptInitiation.showSystemDialogDone();
+            mContextFromScriptInitiation = null;
+        }
+
         mPrintingState = PRINTING_STATE_FINISHED;
 
         closeFileDescriptor(mFileDescriptor);