tdf#89860 ability to print from Android Viewer

Change-Id: I13c7f3e085095f1c0d88ab3668557fcc1c4cb23a
Signed-off-by: Mert Tumer <merttumer@outlook.com>
Reviewed-on: https://gerrit.libreoffice.org/58900
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>

5 files changed, 117 insertions, 1 deletions

diff --git a/android/source/res/menu/main.xml b/android/source/res/menu/main.xml
index 257a5844b3b3..d5f1ae8e4274 100644
--- a/android/source/res/menu/main.xml
+++ b/android/source/res/menu/main.xml
@@ -42,6 +42,11 @@
             android:visible="true"
             />
 
+        <item android:id="@+id/action_print"
+            android:title="@string/action_print"
+            android:orderInCategory="100"
+            android:visible="true" />
+
         <item android:id="@+id/action_UNO_commands"
             android:title="@string/action_UNO_commands"
             android:orderInCategory="100" />
diff --git a/android/source/res/values/strings.xml b/android/source/res/values/strings.xml
index fa83cf4a74b3..17e52316bdb4 100644
--- a/android/source/res/values/strings.xml
+++ b/android/source/res/values/strings.xml
@@ -210,4 +210,5 @@
     <string name="UNO_commands_string_value_hint">Value</string>
     <string name="UNO_commands_string_parent_value_hint">Parent Value</string>
     <string name="action_exportToPDF">Export To PDF</string>
+    <string name="action_print">Print</string>
 </resources>
diff --git a/android/source/src/java/org/libreoffice/LOKitTileProvider.java b/android/source/src/java/org/libreoffice/LOKitTileProvider.java
index 2815b839ad5c..7464f152698d 100644
--- a/android/source/src/java/org/libreoffice/LOKitTileProvider.java
+++ b/android/source/src/java/org/libreoffice/LOKitTileProvider.java
@@ -8,9 +8,14 @@
  */
 package org.libreoffice;
 
+import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.PointF;
+import android.os.Build;
 import android.os.Environment;
+import android.print.PrintAttributes;
+import android.print.PrintDocumentAdapter;
+import android.print.PrintManager;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.widget.Toast;
@@ -372,11 +377,27 @@ class LOKitTileProvider implements TileProvider {
             String cacheFile = mContext.getExternalCacheDir().getAbsolutePath()
                     + "/" + file;
             mDocument.saveAs("file://"+cacheFile,"pdf","");
-            //TODO PRINT
+            printDocument(cacheFile);
         }else{
             saveDocumentAs(dir+"/"+file,"pdf");
         }
     }
+
+    private void printDocument(String cacheFile) {
+        if (Build.VERSION.SDK_INT >= 19) {
+            try {
+                PrintManager printManager = (PrintManager) mContext.getSystemService(Context.PRINT_SERVICE);
+                PrintDocumentAdapter printAdapter = new PDFDocumentAdapter(mContext, cacheFile);
+                printManager.print("Document", printAdapter, new PrintAttributes.Builder().build());
+
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        } else {
+            mContext.showCustomStatusMessage("Your device does not support printing");
+        }
+    }
+
     public boolean isDocumentCached(){
         File input = new File(mInputFile);
         final String cacheFile = mContext.getExternalCacheDir().getAbsolutePath() + "/lo_cached_" + input.getName();
diff --git a/android/source/src/java/org/libreoffice/PDFDocumentAdapter.java b/android/source/src/java/org/libreoffice/PDFDocumentAdapter.java
new file mode 100644
index 000000000000..2ce167ce3a32
--- /dev/null
+++ b/android/source/src/java/org/libreoffice/PDFDocumentAdapter.java
@@ -0,0 +1,86 @@
+package org.libreoffice;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Bundle;
+import android.os.CancellationSignal;
+import android.os.ParcelFileDescriptor;
+import android.print.PageRange;
+import android.print.PrintAttributes;
+import android.print.PrintDocumentAdapter;
+import android.print.PrintDocumentInfo;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+@TargetApi(19)
+public class PDFDocumentAdapter extends PrintDocumentAdapter{
+    Context mContext;
+    String pdfFile;
+
+    public PDFDocumentAdapter(Context mContext, String pdfFile) {
+        this.mContext = mContext;
+        this.pdfFile = pdfFile;
+    }
+
+    @Override
+    public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
+        if (cancellationSignal.isCanceled()) {
+            callback.onLayoutCancelled();
+        }
+        else {
+            File f = new File(pdfFile);
+            PrintDocumentInfo.Builder builder=
+                    new PrintDocumentInfo.Builder(f.getName());
+            builder.setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
+                    .setPageCount(PrintDocumentInfo.PAGE_COUNT_UNKNOWN)
+                    .build();
+            callback.onLayoutFinished(builder.build(),
+                    !newAttributes.equals(oldAttributes));
+        }
+    }
+
+    @Override
+    public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback) {
+        InputStream in=null;
+        OutputStream out=null;
+        try {
+            File file = new File(pdfFile);
+            in = new FileInputStream(file);
+            out=new FileOutputStream(destination.getFileDescriptor());
+
+            byte[] buf=new byte[in.available()];
+            int size;
+
+            while ((size=in.read(buf)) >= 0
+                    && !cancellationSignal.isCanceled()) {
+                out.write(buf, 0, size);
+            }
+
+            if (cancellationSignal.isCanceled()) {
+                callback.onWriteCancelled();
+            }
+            else {
+                callback.onWriteFinished(new PageRange[] { PageRange.ALL_PAGES });
+            }
+        }
+        catch (Exception e) {
+            callback.onWriteFailed(e.getMessage());
+            e.printStackTrace();
+        }
+        finally {
+            try {
+                in.close();
+                out.close();
+            }
+            catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/android/source/src/java/org/libreoffice/ToolbarController.java b/android/source/src/java/org/libreoffice/ToolbarController.java
index 8aa638e12b2f..29d5433df057 100644
--- a/android/source/src/java/org/libreoffice/ToolbarController.java
+++ b/android/source/src/java/org/libreoffice/ToolbarController.java
@@ -174,6 +174,9 @@ public class ToolbarController implements Toolbar.OnMenuItemClickListener {
             case R.id.action_exportToPDF:
                 mContext.getTileProvider().exportToPDF(false);
                 return true;
+            case R.id.action_print:
+                mContext.getTileProvider().exportToPDF(true);
+                return true;
             case R.id.action_settings:
                 mContext.showSettings();
                 return true;