| /* |
| * 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.printservice; |
| |
| import android.os.RemoteException; |
| import android.print.PrintJobId; |
| import android.print.PrintJobInfo; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| /** |
| * This class represents a print job from the perspective of a print |
| * service. It provides APIs for observing the print job state and |
| * performing operations on the print job. |
| * <p> |
| * <strong>Note: </strong> All methods of this class must be invoked on |
| * the main application thread. |
| * </p> |
| */ |
| public final class PrintJob { |
| |
| private static final String LOG_TAG = "PrintJob"; |
| |
| private final IPrintServiceClient mPrintServiceClient; |
| |
| private final PrintDocument mDocument; |
| |
| private PrintJobInfo mCachedInfo; |
| |
| PrintJob(PrintJobInfo jobInfo, IPrintServiceClient client) { |
| mCachedInfo = jobInfo; |
| mPrintServiceClient = client; |
| mDocument = new PrintDocument(mCachedInfo.getId(), client, |
| jobInfo.getDocumentInfo()); |
| } |
| |
| /** |
| * Gets the unique print job id. |
| * |
| * @return The id. |
| */ |
| public PrintJobId getId() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return mCachedInfo.getId(); |
| } |
| |
| /** |
| * Gets the {@link PrintJobInfo} that describes this job. |
| * <p> |
| * <strong>Node:</strong>The returned info object is a snapshot of the |
| * current print job state. Every call to this method returns a fresh |
| * info object that reflects the current print job state. |
| * </p> |
| * |
| * @return The print job info. |
| */ |
| public PrintJobInfo getInfo() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| if (isInImmutableState()) { |
| return mCachedInfo; |
| } |
| PrintJobInfo info = null; |
| try { |
| info = mPrintServiceClient.getPrintJobInfo(mCachedInfo.getId()); |
| } catch (RemoteException re) { |
| Log.e(LOG_TAG, "Couldn't get info for job: " + mCachedInfo.getId(), re); |
| } |
| if (info != null) { |
| mCachedInfo = info; |
| } |
| return mCachedInfo; |
| } |
| |
| /** |
| * Gets the printed document. |
| * |
| * @return The document. |
| */ |
| public PrintDocument getDocument() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return mDocument; |
| } |
| |
| /** |
| * Gets whether this print job is queued. Such a print job is |
| * ready to be printed and can be started or cancelled. |
| * |
| * @return Whether the print job is queued. |
| * |
| * @see #start() |
| * @see #cancel() |
| */ |
| public boolean isQueued() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getState() == PrintJobInfo.STATE_QUEUED; |
| } |
| |
| /** |
| * Gets whether this print job is started. Such a print job is |
| * being printed and can be completed or canceled or failed. |
| * |
| * @return Whether the print job is started. |
| * |
| * @see #complete() |
| * @see #cancel() |
| * @see #fail(CharSequence) |
| */ |
| public boolean isStarted() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getState() == PrintJobInfo.STATE_STARTED; |
| } |
| |
| /** |
| * Gets whether this print job is blocked. Such a print job is halted |
| * due to an abnormal condition and can be started or canceled or failed. |
| * |
| * @return Whether the print job is blocked. |
| * |
| * @see #start() |
| * @see #cancel() |
| * @see #fail(CharSequence) |
| */ |
| public boolean isBlocked() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getState() == PrintJobInfo.STATE_BLOCKED; |
| } |
| |
| /** |
| * Gets whether this print job is completed. Such a print job |
| * is successfully printed. This is a final state. |
| * |
| * @return Whether the print job is completed. |
| * |
| * @see #complete() |
| */ |
| public boolean isCompleted() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getState() == PrintJobInfo.STATE_COMPLETED; |
| } |
| |
| /** |
| * Gets whether this print job is failed. Such a print job is |
| * not successfully printed due to an error. This is a final state. |
| * |
| * @return Whether the print job is failed. |
| * |
| * @see #fail(CharSequence) |
| */ |
| public boolean isFailed() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getState() == PrintJobInfo.STATE_FAILED; |
| } |
| |
| /** |
| * Gets whether this print job is cancelled. Such a print job was |
| * cancelled as a result of a user request. This is a final state. |
| * |
| * @return Whether the print job is cancelled. |
| * |
| * @see #cancel() |
| */ |
| public boolean isCancelled() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getState() == PrintJobInfo.STATE_CANCELED; |
| } |
| |
| /** |
| * Starts the print job. You should call this method if {@link |
| * #isQueued()} or {@link #isBlocked()} returns true and you started |
| * resumed printing. |
| * |
| * @return Whether the job was started. |
| * |
| * @see #isQueued() |
| * @see #isBlocked() |
| */ |
| public boolean start() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| final int state = getInfo().getState(); |
| if (state == PrintJobInfo.STATE_QUEUED |
| || state == PrintJobInfo.STATE_BLOCKED) { |
| return setState(PrintJobInfo.STATE_STARTED, null); |
| } |
| return false; |
| } |
| |
| /** |
| * Blocks the print job. You should call this method if {@link |
| * #isStarted()} or {@link #isBlocked()} returns true and you need |
| * to block the print job. For example, the user has to add some |
| * paper to continue printing. To resume the print job call {@link |
| * #start()}. |
| * |
| * @return Whether the job was blocked. |
| * |
| * @see #isStarted() |
| * @see #isBlocked() |
| */ |
| public boolean block(String reason) { |
| PrintService.throwIfNotCalledOnMainThread(); |
| PrintJobInfo info = getInfo(); |
| final int state = info.getState(); |
| if (state == PrintJobInfo.STATE_STARTED |
| || (state == PrintJobInfo.STATE_BLOCKED |
| && !TextUtils.equals(info.getStateReason(), reason))) { |
| return setState(PrintJobInfo.STATE_BLOCKED, reason); |
| } |
| return false; |
| } |
| |
| /** |
| * Completes the print job. You should call this method if {@link |
| * #isStarted()} returns true and you are done printing. |
| * |
| * @return Whether the job as completed. |
| * |
| * @see #isStarted() |
| */ |
| public boolean complete() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| if (isStarted()) { |
| return setState(PrintJobInfo.STATE_COMPLETED, null); |
| } |
| return false; |
| } |
| |
| /** |
| * Fails the print job. You should call this method if {@link |
| * #isQueued()} or {@link #isStarted()} or {@link #isBlocked()} |
| * returns true you failed while printing. |
| * |
| * @param error The human readable, short, and translated reason |
| * for the failure. |
| * @return Whether the job was failed. |
| * |
| * @see #isQueued() |
| * @see #isStarted() |
| * @see #isBlocked() |
| */ |
| public boolean fail(String error) { |
| PrintService.throwIfNotCalledOnMainThread(); |
| if (!isInImmutableState()) { |
| return setState(PrintJobInfo.STATE_FAILED, error); |
| } |
| return false; |
| } |
| |
| /** |
| * Cancels the print job. You should call this method if {@link |
| * #isQueued()} or {@link #isStarted() or #isBlocked()} returns |
| * true and you canceled the print job as a response to a call to |
| * {@link PrintService#onRequestCancelPrintJob(PrintJob)}. |
| * |
| * @return Whether the job is canceled. |
| * |
| * @see #isStarted() |
| * @see #isQueued() |
| * @see #isBlocked() |
| */ |
| public boolean cancel() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| if (!isInImmutableState()) { |
| return setState(PrintJobInfo.STATE_CANCELED, null); |
| } |
| return false; |
| } |
| |
| /** |
| * Sets a tag that is valid in the context of a {@link PrintService} |
| * and is not interpreted by the system. For example, a print service |
| * may set as a tag the key of the print job returned by a remote |
| * print server, if the printing is off handed to a cloud based service. |
| * |
| * @param tag The tag. |
| * @return True if the tag was set, false otherwise. |
| */ |
| public boolean setTag(String tag) { |
| PrintService.throwIfNotCalledOnMainThread(); |
| if (isInImmutableState()) { |
| return false; |
| } |
| try { |
| return mPrintServiceClient.setPrintJobTag(mCachedInfo.getId(), tag); |
| } catch (RemoteException re) { |
| Log.e(LOG_TAG, "Error setting tag for job: " + mCachedInfo.getId(), re); |
| } |
| return false; |
| } |
| |
| /** |
| * Gets the print job tag. |
| * |
| * @return The tag or null. |
| * |
| * @see #setTag(String) |
| */ |
| public String getTag() { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getTag(); |
| } |
| |
| /** |
| * Gets the value of an advanced (printer specific) print option. |
| * |
| * @param key The option key. |
| * @return The option value. |
| */ |
| public String getAdvancedStringOption(String key) { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getAdvancedStringOption(key); |
| } |
| |
| /** |
| * Gets whether this job has a given advanced (printer specific) print |
| * option. |
| * |
| * @param key The option key. |
| * @return Whether the option is present. |
| */ |
| public boolean hasAdvancedOption(String key) { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().hasAdvancedOption(key); |
| } |
| |
| /** |
| * Gets the value of an advanced (printer specific) print option. |
| * |
| * @param key The option key. |
| * @return The option value. |
| */ |
| public int getAdvancedIntOption(String key) { |
| PrintService.throwIfNotCalledOnMainThread(); |
| return getInfo().getAdvancedIntOption(key); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| PrintJob other = (PrintJob) obj; |
| return (mCachedInfo.getId().equals(other.mCachedInfo.getId())); |
| } |
| |
| @Override |
| public int hashCode() { |
| return mCachedInfo.getId().hashCode(); |
| } |
| |
| private boolean isInImmutableState() { |
| final int state = mCachedInfo.getState(); |
| return state == PrintJobInfo.STATE_COMPLETED |
| || state == PrintJobInfo.STATE_CANCELED |
| || state == PrintJobInfo.STATE_FAILED; |
| } |
| |
| private boolean setState(int state, String error) { |
| try { |
| if (mPrintServiceClient.setPrintJobState(mCachedInfo.getId(), state, error)) { |
| // Best effort - update the state of the cached info since |
| // we may not be able to re-fetch it later if the job gets |
| // removed from the spooler as a result of the state change. |
| mCachedInfo.setState(state); |
| mCachedInfo.setStateReason(error); |
| return true; |
| } |
| } catch (RemoteException re) { |
| Log.e(LOG_TAG, "Error setting the state of job: " + mCachedInfo.getId(), re); |
| } |
| return false; |
| } |
| } |