// Updates all existing logical displays given the current set of display devices.
// Removes invalid logical displays.
// Sends notifications if needed.
private boolean updateLogicalDisplaysLocked() {
boolean changed = false;
for (int i = mLogicalDisplays.size(); i-- > 0; ) {
final int displayId = mLogicalDisplays.keyAt(i);
LogicalDisplay display = mLogicalDisplays.valueAt(i);
mTempDisplayInfo.copyFrom(display.getDisplayInfoLocked());
display.updateLocked(mDisplayDevices);
if (!display.isValidLocked()) {
mLogicalDisplays.removeAt(i);
sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_REMOVED);
changed = true;
} else if (!mTempDisplayInfo.equals(display.getDisplayInfoLocked())) {
sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
changed = true;
}
}
return changed;
}
// Adds a new logical display based on the given display device.
// Sends notifications if needed.
private void addLogicalDisplayLocked(DisplayDevice device) {
DisplayDeviceInfo deviceInfo = device.getDisplayDeviceInfoLocked();
boolean isDefault = (deviceInfo.flags & DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY) != 0;
if (isDefault && mLogicalDisplays.get(Display.DEFAULT_DISPLAY) != null) {
Slog.w(TAG, "Ignoring attempt to add a second default display: " + deviceInfo);
isDefault = false;
}
if (!isDefault && mSingleDisplayDemoMode) {
Slog.i(
TAG,
"Not creating a logical display for a secondary display "
+ " because single display demo mode is enabled: "
+ deviceInfo);
return;
}
final int displayId = assignDisplayIdLocked(isDefault);
final int layerStack = assignLayerStackLocked(displayId);
LogicalDisplay display = new LogicalDisplay(displayId, layerStack, device);
display.updateLocked(mDisplayDevices);
if (!display.isValidLocked()) {
// This should never happen currently.
Slog.w(
TAG,
"Ignoring display device because the logical display "
+ "created from it was not considered valid: "
+ deviceInfo);
return;
}
mLogicalDisplays.put(displayId, display);
// Wake up waitForDefaultDisplay.
if (isDefault) {
mSyncRoot.notifyAll();
}
sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_ADDED);
}