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Make sure PrinterCapabilitiesInfo always have sane values.

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Change-Id: I1ae7fe6aabdbe7f9480c4067690338103adaafa2
This commit is contained in:
Philip P. Moltmann
2016-03-30 14:18:00 -07:00
parent 4723f36d3e
commit e680a8db52
1 changed files with 32 additions and 16 deletions
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48
core/java/android/print/PrinterCapabilitiesInfo.java
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@@ -24,11 +24,13 @@ import android.print.PrintAttributes.DuplexMode;
import android.print.PrintAttributes.Margins;
import android.print.PrintAttributes.MediaSize;
import android.print.PrintAttributes.Resolution;
import com.android.internal.util.Preconditions;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.function.IntConsumer;
/**
* This class represents the capabilities of a printer. Instances
@@ -55,9 +57,9 @@ public final class PrinterCapabilitiesInfo implements Parcelable {
private static final Margins DEFAULT_MARGINS = new Margins(0, 0, 0, 0);
private Margins mMinMargins = DEFAULT_MARGINS;
private List<MediaSize> mMediaSizes;
private List<Resolution> mResolutions;
private @NonNull Margins mMinMargins = DEFAULT_MARGINS;
private @NonNull List<MediaSize> mMediaSizes;
private @NonNull List<Resolution> mResolutions;
private int mColorModes;
private int mDuplexModes;
@@ -205,15 +207,37 @@ public final class PrinterCapabilitiesInfo implements Parcelable {
return builder.build();
}
/**
* Call enforceSingle for each bit in the mask.
*
* @param mask The mask
* @param enforceSingle The function to call
*/
private static void enforceValidMask(int mask, IntConsumer enforceSingle) {
int current = mask;
while (current > 0) {
final int currentMode = (1 << Integer.numberOfTrailingZeros(current));
current &= ~currentMode;
enforceSingle.accept(currentMode);
}
}
private PrinterCapabilitiesInfo(Parcel parcel) {
mMinMargins = readMargins(parcel);
mMinMargins = Preconditions.checkNotNull(readMargins(parcel));
readMediaSizes(parcel);
readResolutions(parcel);
mColorModes = parcel.readInt();
enforceValidMask(mColorModes,
(currentMode) -> PrintAttributes.enforceValidColorMode(currentMode));
mDuplexModes = parcel.readInt();
enforceValidMask(mDuplexModes,
(currentMode) -> PrintAttributes.enforceValidColorMode(currentMode));
readDefaults(parcel);
Preconditions.checkArgument(mMediaSizes.size() > mDefaults[PROPERTY_MEDIA_SIZE]);
Preconditions.checkArgument(mResolutions.size() > mDefaults[PROPERTY_RESOLUTION]);
}
@Override
@@ -537,12 +561,8 @@ public final class PrinterCapabilitiesInfo implements Parcelable {
*/
public @NonNull Builder setColorModes(@ColorMode int colorModes,
@ColorMode int defaultColorMode) {
int currentModes = colorModes;
while (currentModes > 0) {
final int currentMode = (1 << Integer.numberOfTrailingZeros(currentModes));
currentModes &= ~currentMode;
PrintAttributes.enforceValidColorMode(currentMode);
}
enforceValidMask(colorModes,
(currentMode) -> PrintAttributes.enforceValidColorMode(currentMode));
PrintAttributes.enforceValidColorMode(defaultColorMode);
mPrototype.mColorModes = colorModes;
mPrototype.mDefaults[PROPERTY_COLOR_MODE] = defaultColorMode;
@@ -568,12 +588,8 @@ public final class PrinterCapabilitiesInfo implements Parcelable {
*/
public @NonNull Builder setDuplexModes(@DuplexMode int duplexModes,
@DuplexMode int defaultDuplexMode) {
int currentModes = duplexModes;
while (currentModes > 0) {
final int currentMode = (1 << Integer.numberOfTrailingZeros(currentModes));
currentModes &= ~currentMode;
PrintAttributes.enforceValidDuplexMode(currentMode);
}
enforceValidMask(duplexModes,
(currentMode) -> PrintAttributes.enforceValidDuplexMode(currentMode));
PrintAttributes.enforceValidDuplexMode(defaultDuplexMode);
mPrototype.mDuplexModes = duplexModes;
mPrototype.mDefaults[PROPERTY_DUPLEX_MODE] = defaultDuplexMode;