| /* |
| * Copyright (C) 2013 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 android.print.pdf; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Matrix; |
| import android.graphics.Rect; |
| |
| import java.io.OutputStream; |
| |
| /** |
| * This class enables generating a PDF document from native Android |
| * content. A client uses a factory method in this class to create a |
| * blank page, a {@link Canvas}, on which native Android content can |
| * be drawn. Then the client draws arbitrary content on the page via |
| * the {@link Canvas} APIs. Next the client adds the page to the |
| * document. After all pages have been added the client calls the |
| * {@link #write(OutputStream)} method to emit a PDF document. |
| * </p> |
| * <p> |
| * A typical use of the APIs looks like this: |
| * </p> |
| * <pre> |
| * // Create a document. |
| * PdfDocument document = new PdfDocument(); |
| * |
| * // Create a blank page. |
| * PdfPage page = document.createPage(pageBounds, contentBounds, |
| * initialTransform); |
| * |
| * // Draw the content view on the page. |
| * content.draw(page); |
| * |
| * // Add the page to the document. |
| * document.appendPage(page); |
| * |
| * // Write the document to a file. |
| * document.write(createOutputStream()); |
| * </pre> |
| */ |
| public class PdfDocument { |
| |
| private final byte[] mChunk = new byte[1024]; |
| |
| private final int mNativeDocument; |
| |
| /** |
| * Creates a new instance. |
| */ |
| public PdfDocument() { |
| mNativeDocument = native_createDocument(); |
| } |
| |
| /** |
| * Creates a PDF page with the specified <code>pageSize</code> and |
| * <code>contentSize</code> Anything outside of the drawing area will be |
| * clipped. |
| * |
| * @param pageSize The page size in points. |
| * @param contentSize The content size in points. |
| * @return A blank page. |
| */ |
| public PdfPage createPage(Rect pageSize, Rect contentSize) { |
| return new PdfPage(pageSize, contentSize, new Matrix()); |
| } |
| |
| /** |
| * Creates a PDF page with the specified <code>pageSize</code>, |
| * <code>contentSize</code>, and <code>initialTransform</code>. The |
| * initial transform is combined with the content size to determine |
| * the drawing area. Anything outside of the drawing area will be |
| * clipped. The initial transform may be useful to move the origin |
| * to account for applying a margin, scale, or rotation. |
| * |
| * @param pageSize The page size in points. |
| * @param contentSize The content size in points. |
| * @param initialTransform The initial transform to apply to the page. |
| * @return A blank page. |
| */ |
| public PdfPage createPage(Rect pageSize, Rect contentSize, Matrix initialTransform) { |
| return new PdfPage(pageSize, contentSize, initialTransform); |
| } |
| |
| /** |
| * Append the page to the document. |
| * |
| * @param page The page. |
| * @return Whether the addition succeeded. |
| */ |
| public boolean appendPage(PdfPage page) { |
| return native_appendPage(mNativeDocument, page.mNativeCanvas); |
| } |
| |
| /** |
| * Writes the document to an output stream. |
| * |
| * @param out The output stream. |
| */ |
| public void write(OutputStream out) { |
| native_write(mNativeDocument, out, mChunk); |
| } |
| |
| @Override |
| public void finalize() throws Throwable { |
| try { |
| if (mNativeDocument != 0) { |
| native_finalize(mNativeDocument); |
| } |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| /** |
| * This class represents a page in a PDF document. It is a |
| * {@link Canvas} on which any arbitrary content can be drawn. |
| * |
| * @see PdfDocument |
| */ |
| public class PdfPage extends Canvas { |
| |
| private PdfPage(Rect pageSize, Rect contentSize, Matrix initialTransform) { |
| super(native_createPage(pageSize, contentSize, initialTransform.native_instance)); |
| } |
| |
| @Override |
| public void setBitmap(Bitmap bitmap) { |
| throw new UnsupportedOperationException( |
| "Cannot set bitmap device on a pdf canvas!"); |
| } |
| } |
| |
| private native int native_createDocument(); |
| |
| private native void native_finalize(int document); |
| |
| private native boolean native_appendPage(int document, int page); |
| |
| private native void native_write(int document, OutputStream out, byte[] chunk); |
| |
| private static native int native_createPage(Rect pageSize, |
| Rect contentSize, int nativeMatrix); |
| } |