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Diffstat (limited to 'core/java/android/print/PrintManager.java')
-rw-r--r--core/java/android/print/PrintManager.java208
1 files changed, 165 insertions, 43 deletions
diff --git a/core/java/android/print/PrintManager.java b/core/java/android/print/PrintManager.java
index 0859fdd..9c7c1fe 100644
--- a/core/java/android/print/PrintManager.java
+++ b/core/java/android/print/PrintManager.java
@@ -57,6 +57,8 @@ public final class PrintManager {
private static final String LOG_TAG = "PrintManager";
+ private static final boolean DEBUG = false;
+
/** @hide */
public static final int APP_ID_ANY = -2;
@@ -350,6 +352,16 @@ public final class PrintManager {
private Handler mHandler; // Strong reference OK - cleared in finish()
+ private LayoutSpec mLastLayoutSpec;
+
+ private WriteSpec mLastWriteSpec;
+
+ private boolean mStartReqeusted;
+ private boolean mStarted;
+
+ private boolean mFinishRequested;
+ private boolean mFinished;
+
public PrintDocumentAdapterDelegate(PrintDocumentAdapter documentAdapter, Looper looper) {
mDocumentAdapter = documentAdapter;
mHandler = new MyHandler(looper);
@@ -357,47 +369,102 @@ public final class PrintManager {
@Override
public void start() {
- mHandler.sendEmptyMessage(MyHandler.MSG_START);
+ synchronized (mLock) {
+ // Started or finished - nothing to do.
+ if (mStartReqeusted || mFinishRequested) {
+ return;
+ }
+
+ mStartReqeusted = true;
+
+ doPendingWorkLocked();
+ }
}
@Override
public void layout(PrintAttributes oldAttributes, PrintAttributes newAttributes,
ILayoutResultCallback callback, Bundle metadata, int sequence) {
synchronized (mLock) {
- if (mLayoutOrWriteCancellation != null) {
- mLayoutOrWriteCancellation.cancel();
+ // Start not called or finish called - nothing to do.
+ if (!mStartReqeusted || mFinishRequested) {
+ return;
+ }
+
+ // Layout cancels write and overrides layout.
+ if (mLastWriteSpec != null) {
+ IoUtils.closeQuietly(mLastWriteSpec.fd);
+ mLastWriteSpec = null;
}
+
+ mLastLayoutSpec = new LayoutSpec();
+ mLastLayoutSpec.callback = callback;
+ mLastLayoutSpec.oldAttributes = oldAttributes;
+ mLastLayoutSpec.newAttributes = newAttributes;
+ mLastLayoutSpec.metadata = metadata;
+ mLastLayoutSpec.sequence = sequence;
+
+ // Cancel the previous cancellable operation.When the
+ // cancellation completes we will do the pending work.
+ if (cancelPreviousCancellableOperationLocked()) {
+ return;
+ }
+
+ doPendingWorkLocked();
}
- SomeArgs args = SomeArgs.obtain();
- args.arg1 = oldAttributes;
- args.arg2 = newAttributes;
- args.arg3 = callback;
- args.arg4 = metadata;
- args.argi1 = sequence;
- mHandler.removeMessages(MyHandler.MSG_LAYOUT);
- mHandler.obtainMessage(MyHandler.MSG_LAYOUT, args).sendToTarget();
}
@Override
public void write(PageRange[] pages, ParcelFileDescriptor fd,
IWriteResultCallback callback, int sequence) {
synchronized (mLock) {
- if (mLayoutOrWriteCancellation != null) {
- mLayoutOrWriteCancellation.cancel();
+ // Start not called or finish called - nothing to do.
+ if (!mStartReqeusted || mFinishRequested) {
+ return;
+ }
+
+ // Write cancels previous writes.
+ if (mLastWriteSpec != null) {
+ IoUtils.closeQuietly(mLastWriteSpec.fd);
+ mLastWriteSpec = null;
}
+
+ mLastWriteSpec = new WriteSpec();
+ mLastWriteSpec.callback = callback;
+ mLastWriteSpec.pages = pages;
+ mLastWriteSpec.fd = fd;
+ mLastWriteSpec.sequence = sequence;
+
+ // Cancel the previous cancellable operation.When the
+ // cancellation completes we will do the pending work.
+ if (cancelPreviousCancellableOperationLocked()) {
+ return;
+ }
+
+ doPendingWorkLocked();
}
- SomeArgs args = SomeArgs.obtain();
- args.arg1 = pages;
- args.arg2 = fd;
- args.arg3 = callback;
- args.argi1 = sequence;
- mHandler.removeMessages(MyHandler.MSG_WRITE);
- mHandler.obtainMessage(MyHandler.MSG_WRITE, args).sendToTarget();
}
@Override
public void finish() {
- mHandler.sendEmptyMessage(MyHandler.MSG_FINISH);
+ synchronized (mLock) {
+ // Start not called or finish called - nothing to do.
+ if (!mStartReqeusted || mFinishRequested) {
+ return;
+ }
+
+ mFinishRequested = true;
+
+ // When the current write or layout complete we
+ // will do the pending work.
+ if (mLastLayoutSpec != null || mLastWriteSpec != null) {
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Waiting for current operation");
+ }
+ return;
+ }
+
+ doPendingWorkLocked();
+ }
}
private boolean isFinished() {
@@ -407,7 +474,49 @@ public final class PrintManager {
private void doFinish() {
mDocumentAdapter = null;
mHandler = null;
- mLayoutOrWriteCancellation = null;
+ synchronized (mLock) {
+ mLayoutOrWriteCancellation = null;
+ }
+ }
+
+ private boolean cancelPreviousCancellableOperationLocked() {
+ if (mLayoutOrWriteCancellation != null) {
+ mLayoutOrWriteCancellation.cancel();
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Cancelling previous operation");
+ }
+ return true;
+ }
+ return false;
+ }
+
+ private void doPendingWorkLocked() {
+ if (mStartReqeusted && !mStarted) {
+ mStarted = true;
+ mHandler.sendEmptyMessage(MyHandler.MSG_START);
+ } else if (mLastLayoutSpec != null) {
+ mHandler.sendEmptyMessage(MyHandler.MSG_LAYOUT);
+ } else if (mLastWriteSpec != null) {
+ mHandler.sendEmptyMessage(MyHandler.MSG_WRITE);
+ } else if (mFinishRequested && !mFinished) {
+ mFinished = true;
+ mHandler.sendEmptyMessage(MyHandler.MSG_FINISH);
+ }
+ }
+
+ private class LayoutSpec {
+ ILayoutResultCallback callback;
+ PrintAttributes oldAttributes;
+ PrintAttributes newAttributes;
+ Bundle metadata;
+ int sequence;
+ }
+
+ private class WriteSpec {
+ IWriteResultCallback callback;
+ PageRange[] pages;
+ ParcelFileDescriptor fd;
+ int sequence;
}
private final class MyHandler extends Handler {
@@ -431,41 +540,52 @@ public final class PrintManager {
} break;
case MSG_LAYOUT: {
- SomeArgs args = (SomeArgs) message.obj;
- PrintAttributes oldAttributes = (PrintAttributes) args.arg1;
- PrintAttributes newAttributes = (PrintAttributes) args.arg2;
- ILayoutResultCallback callback = (ILayoutResultCallback) args.arg3;
- Bundle metadata = (Bundle) args.arg4;
- final int sequence = args.argi1;
- args.recycle();
-
- CancellationSignal cancellation = new CancellationSignal();
+ final CancellationSignal cancellation;
+ final LayoutSpec layoutSpec;
+
synchronized (mLock) {
+ layoutSpec = mLastLayoutSpec;
+ mLastLayoutSpec = null;
+ cancellation = new CancellationSignal();
mLayoutOrWriteCancellation = cancellation;
}
- mDocumentAdapter.onLayout(oldAttributes, newAttributes, cancellation,
- new MyLayoutResultCallback(callback, sequence), metadata);
+ if (layoutSpec != null) {
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Performing layout");
+ }
+ mDocumentAdapter.onLayout(layoutSpec.oldAttributes,
+ layoutSpec.newAttributes, cancellation,
+ new MyLayoutResultCallback(layoutSpec.callback,
+ layoutSpec.sequence), layoutSpec.metadata);
+ }
} break;
case MSG_WRITE: {
- SomeArgs args = (SomeArgs) message.obj;
- PageRange[] pages = (PageRange[]) args.arg1;
- ParcelFileDescriptor fd = (ParcelFileDescriptor) args.arg2;
- IWriteResultCallback callback = (IWriteResultCallback) args.arg3;
- final int sequence = args.argi1;
- args.recycle();
-
- CancellationSignal cancellation = new CancellationSignal();
+ final CancellationSignal cancellation;
+ final WriteSpec writeSpec;
+
synchronized (mLock) {
+ writeSpec= mLastWriteSpec;
+ mLastWriteSpec = null;
+ cancellation = new CancellationSignal();
mLayoutOrWriteCancellation = cancellation;
}
- mDocumentAdapter.onWrite(pages, fd, cancellation,
- new MyWriteResultCallback(callback, fd, sequence));
+ if (writeSpec != null) {
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Performing write");
+ }
+ mDocumentAdapter.onWrite(writeSpec.pages, writeSpec.fd,
+ cancellation, new MyWriteResultCallback(writeSpec.callback,
+ writeSpec.fd, writeSpec.sequence));
+ }
} break;
case MSG_FINISH: {
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Performing finish");
+ }
mDocumentAdapter.onFinish();
doFinish();
} break;
@@ -533,6 +653,7 @@ public final class PrintManager {
private void clearLocked() {
mLayoutOrWriteCancellation = null;
mCallback = null;
+ doPendingWorkLocked();
}
}
@@ -598,6 +719,7 @@ public final class PrintManager {
IoUtils.closeQuietly(mFd);
mCallback = null;
mFd = null;
+ doPendingWorkLocked();
}
}
}
generated by cgit v1.1 at 2025-10-14 14:04:29 +0000