packages/PrintSpooler/src/com/android/printspooler/renderer/PdfManipulationService.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.printspooler.renderer;

 import android.app.Service;
 import android.content.Intent;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.graphics.Matrix;
 import android.graphics.Rect;
 import android.graphics.pdf.PdfEditor;
 import android.graphics.pdf.PdfRenderer;
 import android.os.IBinder;
 import android.os.ParcelFileDescriptor;
 import android.os.RemoteException;
 import android.print.PageRange;
 import android.print.PrintAttributes;
 import android.print.PrintAttributes.Margins;
 import android.util.Log;
 import android.view.View;
 import com.android.printspooler.util.PageRangeUtils;
 import libcore.io.IoUtils;
 import com.android.printspooler.util.BitmapSerializeUtils;
 import java.io.IOException;

 /**
  * Service for manipulation of PDF documents in an isolated process.
  */
 public final class PdfManipulationService extends Service {
     public static final String ACTION_GET_RENDERER =
             "com.android.printspooler.renderer.ACTION_GET_RENDERER";
     public static final String ACTION_GET_EDITOR =
             "com.android.printspooler.renderer.ACTION_GET_EDITOR";

     public static final int MALFORMED_PDF_FILE_ERROR = -2;

     private static final String LOG_TAG = "PdfManipulationService";
     private static final boolean DEBUG = false;

     private static final int MILS_PER_INCH = 1000;
     private static final int POINTS_IN_INCH = 72;

     @Override
     public IBinder onBind(Intent intent) {
         String action = intent.getAction();
         switch (action) {
             case ACTION_GET_RENDERER: {
                 return new PdfRendererImpl();
             }
             case ACTION_GET_EDITOR: {
                 return new PdfEditorImpl();
             }
             default: {
                 throw new IllegalArgumentException("Invalid intent action:" + action);
             }
         }
     }

     private final class PdfRendererImpl extends IPdfRenderer.Stub {
         private final Object mLock = new Object();

         private Bitmap mBitmap;
         private PdfRenderer mRenderer;

         @Override
         public int openDocument(ParcelFileDescriptor source) throws RemoteException {
             synchronized (mLock) {
                 try {
                     throwIfOpened();
                     if (DEBUG) {
                         Log.i(LOG_TAG, "openDocument()");
                     }
                     mRenderer = new PdfRenderer(source);
                     return mRenderer.getPageCount();
                 } catch (IOException|IllegalStateException e) {
                     IoUtils.closeQuietly(source);
                     Log.e(LOG_TAG, "Cannot open file", e);
                     return MALFORMED_PDF_FILE_ERROR;
                 }
             }
         }

         @Override
         public void renderPage(int pageIndex, int bitmapWidth, int bitmapHeight,
                 PrintAttributes attributes, ParcelFileDescriptor destination) {
             synchronized (mLock) {
                 try {
                     throwIfNotOpened();

                     PdfRenderer.Page page = mRenderer.openPage(pageIndex);

                     final int srcWidthPts = page.getWidth();
                     final int srcHeightPts = page.getHeight();

                     final int dstWidthPts = pointsFromMils(
                             attributes.getMediaSize().getWidthMils());
                     final int dstHeightPts = pointsFromMils(
                             attributes.getMediaSize().getHeightMils());

                     final boolean scaleContent = mRenderer.shouldScaleForPrinting();
                     final boolean contentLandscape = !attributes.getMediaSize().isPortrait();

                     final float displayScale;
                     Matrix matrix = new Matrix();

                     if (scaleContent) {
                         displayScale = Math.min((float) bitmapWidth / srcWidthPts,
                                 (float) bitmapHeight / srcHeightPts);
                     } else {
                         if (contentLandscape) {
                             displayScale = (float) bitmapHeight / dstHeightPts;
                         } else {
                             displayScale = (float) bitmapWidth / dstWidthPts;
                         }
                     }
                     matrix.postScale(displayScale, displayScale);

                     Configuration configuration = PdfManipulationService.this.getResources()
                             .getConfiguration();
                     if (configuration.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
                         matrix.postTranslate(bitmapWidth - srcWidthPts * displayScale, 0);
                     }

                     Margins minMargins = attributes.getMinMargins();
                     final int paddingLeftPts = pointsFromMils(minMargins.getLeftMils());
                     final int paddingTopPts = pointsFromMils(minMargins.getTopMils());
                     final int paddingRightPts = pointsFromMils(minMargins.getRightMils());
                     final int paddingBottomPts = pointsFromMils(minMargins.getBottomMils());

                     Rect clip = new Rect();
                     clip.left = (int) (paddingLeftPts * displayScale);
                     clip.top = (int) (paddingTopPts * displayScale);
                     clip.right = (int) (bitmapWidth - paddingRightPts * displayScale);
                     clip.bottom = (int) (bitmapHeight - paddingBottomPts * displayScale);

                     if (DEBUG) {
                         Log.i(LOG_TAG, "Rendering page:" + pageIndex);
                     }

                     Bitmap bitmap = getBitmapForSize(bitmapWidth, bitmapHeight);
                     page.render(bitmap, clip, matrix, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);

                     page.close();

                     BitmapSerializeUtils.writeBitmapPixels(bitmap, destination);
                 } finally {
                     IoUtils.closeQuietly(destination);
                 }
             }
         }

         @Override
         public void closeDocument() {
             synchronized (mLock) {
                 throwIfNotOpened();
                 if (DEBUG) {
                     Log.i(LOG_TAG, "closeDocument()");
                 }
                 mRenderer.close();
                 mRenderer = null;
             }
         }

         private Bitmap getBitmapForSize(int width, int height) {
             if (mBitmap != null) {
                 if (mBitmap.getWidth() == width && mBitmap.getHeight() == height) {
                     mBitmap.eraseColor(Color.WHITE);
                     return mBitmap;
                 }
                 mBitmap.recycle();
             }
             mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
             mBitmap.eraseColor(Color.WHITE);
             return mBitmap;
         }

         private void throwIfOpened() {
             if (mRenderer != null) {
                 throw new IllegalStateException("Already opened");
             }
         }

         private void throwIfNotOpened() {
             if (mRenderer == null) {
                 throw new IllegalStateException("Not opened");
             }
         }
     }

     private final class PdfEditorImpl extends IPdfEditor.Stub {
         private final Object mLock = new Object();

         private PdfEditor mEditor;

         @Override
         public int openDocument(ParcelFileDescriptor source) throws RemoteException {
             synchronized (mLock) {
                 try {
                     throwIfOpened();
                     if (DEBUG) {
                         Log.i(LOG_TAG, "openDocument()");
                     }
                     mEditor = new PdfEditor(source);
                     return mEditor.getPageCount();
                 } catch (IOException|IllegalStateException e) {
                     IoUtils.closeQuietly(source);
                     Log.e(LOG_TAG, "Cannot open file", e);
                     throw new RemoteException(e.toString());
                 }
             }
         }

         @Override
         public void removePages(PageRange[] ranges) {
             synchronized (mLock) {
                 throwIfNotOpened();
                 if (DEBUG) {
                     Log.i(LOG_TAG, "removePages()");
                 }

                 ranges = PageRangeUtils.normalize(ranges);

                 final int rangeCount = ranges.length;
                 for (int i = rangeCount - 1; i >= 0; i--) {
                     PageRange range = ranges[i];
                     for (int j = range.getEnd(); j >= range.getStart(); j--) {
                         mEditor.removePage(j);
                     }
                 }
             }
         }

         @Override
         public void write(ParcelFileDescriptor destination) throws RemoteException {
             synchronized (mLock) {
                 try {
                     throwIfNotOpened();
                     if (DEBUG) {
                         Log.i(LOG_TAG, "write()");
                     }
                     mEditor.write(destination);
                 } catch (IOException | IllegalStateException e) {
                     IoUtils.closeQuietly(destination);
                     Log.e(LOG_TAG, "Error writing PDF to file.", e);
                     throw new RemoteException(e.toString());
                 }
             }
         }

         @Override
         public void closeDocument() {
             synchronized (mLock) {
                 throwIfNotOpened();
                 if (DEBUG) {
                     Log.i(LOG_TAG, "closeDocument()");
                 }
                 mEditor.close();
                 mEditor = null;
             }
         }

         private void throwIfOpened() {
             if (mEditor != null) {
                 throw new IllegalStateException("Already opened");
             }
         }

         private void throwIfNotOpened() {
             if (mEditor == null) {
                 throw new IllegalStateException("Not opened");
             }
         }
     }

     private static int pointsFromMils(int mils) {
         return (int) (((float) mils / MILS_PER_INCH) * POINTS_IN_INCH);
     }
 }
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.printspooler.renderer;

	import android.app.Service;
	import android.content.Intent;
	import android.content.res.Configuration;
	import android.graphics.Bitmap;
	import android.graphics.Color;
	import android.graphics.Matrix;
	import android.graphics.Rect;
	import android.graphics.pdf.PdfEditor;
	import android.graphics.pdf.PdfRenderer;
	import android.os.IBinder;
	import android.os.ParcelFileDescriptor;
	import android.os.RemoteException;
	import android.print.PageRange;
	import android.print.PrintAttributes;
	import android.print.PrintAttributes.Margins;
	import android.util.Log;
	import android.view.View;
	import com.android.printspooler.util.PageRangeUtils;
	import libcore.io.IoUtils;
	import com.android.printspooler.util.BitmapSerializeUtils;
	import java.io.IOException;

	/**
	* Service for manipulation of PDF documents in an isolated process.
	*/
	public final class PdfManipulationService extends Service {
	public static final String ACTION_GET_RENDERER =
	"com.android.printspooler.renderer.ACTION_GET_RENDERER";
	public static final String ACTION_GET_EDITOR =
	"com.android.printspooler.renderer.ACTION_GET_EDITOR";

	public static final int MALFORMED_PDF_FILE_ERROR = -2;

	private static final String LOG_TAG = "PdfManipulationService";
	private static final boolean DEBUG = false;

	private static final int MILS_PER_INCH = 1000;
	private static final int POINTS_IN_INCH = 72;

	@Override
	public IBinder onBind(Intent intent) {
	String action = intent.getAction();
	switch (action) {
	case ACTION_GET_RENDERER: {
	return new PdfRendererImpl();
	}
	case ACTION_GET_EDITOR: {
	return new PdfEditorImpl();
	}
	default: {
	throw new IllegalArgumentException("Invalid intent action:" + action);
	}
	}
	}

	private final class PdfRendererImpl extends IPdfRenderer.Stub {
	private final Object mLock = new Object();

	private Bitmap mBitmap;
	private PdfRenderer mRenderer;

	@Override
	public int openDocument(ParcelFileDescriptor source) throws RemoteException {
	synchronized (mLock) {
	try {
	throwIfOpened();
	if (DEBUG) {
	Log.i(LOG_TAG, "openDocument()");
	}
	mRenderer = new PdfRenderer(source);
	return mRenderer.getPageCount();
	} catch (IOException\|IllegalStateException e) {
	IoUtils.closeQuietly(source);
	Log.e(LOG_TAG, "Cannot open file", e);
	return MALFORMED_PDF_FILE_ERROR;
	}
	}
	}

	@Override
	public void renderPage(int pageIndex, int bitmapWidth, int bitmapHeight,
	PrintAttributes attributes, ParcelFileDescriptor destination) {
	synchronized (mLock) {
	try {
	throwIfNotOpened();

	PdfRenderer.Page page = mRenderer.openPage(pageIndex);

	final int srcWidthPts = page.getWidth();
	final int srcHeightPts = page.getHeight();

	final int dstWidthPts = pointsFromMils(
	attributes.getMediaSize().getWidthMils());
	final int dstHeightPts = pointsFromMils(
	attributes.getMediaSize().getHeightMils());

	final boolean scaleContent = mRenderer.shouldScaleForPrinting();
	final boolean contentLandscape = !attributes.getMediaSize().isPortrait();

	final float displayScale;
	Matrix matrix = new Matrix();

	if (scaleContent) {
	displayScale = Math.min((float) bitmapWidth / srcWidthPts,
	(float) bitmapHeight / srcHeightPts);
	} else {
	if (contentLandscape) {
	displayScale = (float) bitmapHeight / dstHeightPts;
	} else {
	displayScale = (float) bitmapWidth / dstWidthPts;
	}
	}
	matrix.postScale(displayScale, displayScale);

	Configuration configuration = PdfManipulationService.this.getResources()
	.getConfiguration();
	if (configuration.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
	matrix.postTranslate(bitmapWidth - srcWidthPts * displayScale, 0);
	}

	Margins minMargins = attributes.getMinMargins();
	final int paddingLeftPts = pointsFromMils(minMargins.getLeftMils());
	final int paddingTopPts = pointsFromMils(minMargins.getTopMils());
	final int paddingRightPts = pointsFromMils(minMargins.getRightMils());
	final int paddingBottomPts = pointsFromMils(minMargins.getBottomMils());

	Rect clip = new Rect();
	clip.left = (int) (paddingLeftPts * displayScale);
	clip.top = (int) (paddingTopPts * displayScale);
	clip.right = (int) (bitmapWidth - paddingRightPts * displayScale);
	clip.bottom = (int) (bitmapHeight - paddingBottomPts * displayScale);

	if (DEBUG) {
	Log.i(LOG_TAG, "Rendering page:" + pageIndex);
	}

	Bitmap bitmap = getBitmapForSize(bitmapWidth, bitmapHeight);
	page.render(bitmap, clip, matrix, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);

	page.close();

	BitmapSerializeUtils.writeBitmapPixels(bitmap, destination);
	} finally {
	IoUtils.closeQuietly(destination);
	}
	}
	}

	@Override
	public void closeDocument() {
	synchronized (mLock) {
	throwIfNotOpened();
	if (DEBUG) {
	Log.i(LOG_TAG, "closeDocument()");
	}
	mRenderer.close();
	mRenderer = null;
	}
	}

	private Bitmap getBitmapForSize(int width, int height) {
	if (mBitmap != null) {
	if (mBitmap.getWidth() == width && mBitmap.getHeight() == height) {
	mBitmap.eraseColor(Color.WHITE);
	return mBitmap;
	}
	mBitmap.recycle();
	}
	mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
	mBitmap.eraseColor(Color.WHITE);
	return mBitmap;
	}

	private void throwIfOpened() {
	if (mRenderer != null) {
	throw new IllegalStateException("Already opened");
	}
	}

	private void throwIfNotOpened() {
	if (mRenderer == null) {
	throw new IllegalStateException("Not opened");
	}
	}
	}

	private final class PdfEditorImpl extends IPdfEditor.Stub {
	private final Object mLock = new Object();

	private PdfEditor mEditor;

	@Override
	public int openDocument(ParcelFileDescriptor source) throws RemoteException {
	synchronized (mLock) {
	try {
	throwIfOpened();
	if (DEBUG) {
	Log.i(LOG_TAG, "openDocument()");
	}
	mEditor = new PdfEditor(source);
	return mEditor.getPageCount();
	} catch (IOException\|IllegalStateException e) {
	IoUtils.closeQuietly(source);
	Log.e(LOG_TAG, "Cannot open file", e);
	throw new RemoteException(e.toString());
	}
	}
	}

	@Override
	public void removePages(PageRange[] ranges) {
	synchronized (mLock) {
	throwIfNotOpened();
	if (DEBUG) {
	Log.i(LOG_TAG, "removePages()");
	}

	ranges = PageRangeUtils.normalize(ranges);

	final int rangeCount = ranges.length;
	for (int i = rangeCount - 1; i >= 0; i--) {
	PageRange range = ranges[i];
	for (int j = range.getEnd(); j >= range.getStart(); j--) {
	mEditor.removePage(j);
	}
	}
	}
	}

	@Override
	public void write(ParcelFileDescriptor destination) throws RemoteException {
	synchronized (mLock) {
	try {
	throwIfNotOpened();
	if (DEBUG) {
	Log.i(LOG_TAG, "write()");
	}
	mEditor.write(destination);
	} catch (IOException \| IllegalStateException e) {
	IoUtils.closeQuietly(destination);
	Log.e(LOG_TAG, "Error writing PDF to file.", e);
	throw new RemoteException(e.toString());
	}
	}
	}

	@Override
	public void closeDocument() {
	synchronized (mLock) {
	throwIfNotOpened();
	if (DEBUG) {
	Log.i(LOG_TAG, "closeDocument()");
	}
	mEditor.close();
	mEditor = null;
	}
	}

	private void throwIfOpened() {
	if (mEditor != null) {
	throw new IllegalStateException("Already opened");
	}
	}

	private void throwIfNotOpened() {
	if (mEditor == null) {
	throw new IllegalStateException("Not opened");
	}
	}
	}

	private static int pointsFromMils(int mils) {
	return (int) (((float) mils / MILS_PER_INCH) * POINTS_IN_INCH);
	}
	}