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Adding logic to pull in workspace data from another Launcher3 based

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provider. This allows OEMs to keep the user's homescreen intact while
changing the default home app package.

Bug: 28536314
Change-Id: Ibebfd7dd33aa2cbd9ca28d2d611dd0a4a5971444
This commit is contained in:
Sunny Goyal
2016-07-08 08:32:44 -07:00
parent f03bd4f547
commit a5c8a9eb66
10 changed files with 596 additions and 66 deletions
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104
src/com/android/launcher3/model/GridSizeMigrationTask.java
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@@ -281,7 +281,9 @@ public class GridSizeMigrationTask {
// Try removing all possible combinations
for (int x = 0; x < mSrcX; x++) {
for (int y = startY; y < mSrcY; y++) {
// Try removing the rows first from bottom. This keeps the workspace
// nicely aligned with hotseat.
for (int y = mSrcY - 1; y >= startY; y--) {
// Use a deep copy when trying out a particular combination as it can change
// the underlying object.
ArrayList<DbEntry> itemsOnScreen = tryRemove(x, y, startY, deepCopy(items), outLoss);
@@ -879,6 +881,14 @@ public class GridSizeMigrationTask {
return String.format(Locale.ENGLISH, "%d,%d", x, y);
}
public static void markForMigration(
Context context, int gridX, int gridY, int hotseatSize) {
Utilities.getPrefs(context).edit()
.putString(KEY_MIGRATION_SRC_WORKSPACE_SIZE, getPointString(gridX, gridY))
.putInt(KEY_MIGRATION_SRC_HOTSEAT_COUNT, hotseatSize)
.apply();
}
/**
* Migrates the workspace and hotseat in case their sizes changed.
* @return false if the migration failed.
@@ -915,45 +925,8 @@ public class GridSizeMigrationTask {
Point sourceSize = parsePoint(prefs.getString(
KEY_MIGRATION_SRC_WORKSPACE_SIZE, gridSizeString));
if (!targetSize.equals(sourceSize)) {
// The following list defines all possible grid sizes (and intermediate steps
// during migration). Note that at each step, dx <= 1 && dy <= 1. Any grid size
// which is not in this list is not migrated.
// Note that the InvariantDeviceProfile defines (rows, cols) but the Points
// specified here are defined as (cols, rows).
ArrayList<Point> gridSizeSteps = new ArrayList<>();
gridSizeSteps.add(new Point(3, 2));
gridSizeSteps.add(new Point(3, 3));
gridSizeSteps.add(new Point(4, 3));
gridSizeSteps.add(new Point(4, 4));
gridSizeSteps.add(new Point(5, 5));
gridSizeSteps.add(new Point(6, 5));
gridSizeSteps.add(new Point(6, 6));
gridSizeSteps.add(new Point(7, 7));
int sourceSizeIndex = gridSizeSteps.indexOf(sourceSize);
int targetSizeIndex = gridSizeSteps.indexOf(targetSize);
if (sourceSizeIndex <= -1 || targetSizeIndex <= -1) {
throw new Exception("Unable to migrate grid size from " + sourceSize
+ " to " + targetSize);
}
// Migrate the workspace grid, step by step.
while (targetSizeIndex < sourceSizeIndex ) {
// We only need to migrate the grid if source size is greater
// than the target size.
Point stepTargetSize = gridSizeSteps.get(sourceSizeIndex - 1);
Point stepSourceSize = gridSizeSteps.get(sourceSizeIndex);
if (new GridSizeMigrationTask(context,
LauncherAppState.getInstance().getInvariantDeviceProfile(),
validPackages, stepSourceSize, stepTargetSize).migrateWorkspace()) {
dbChanged = true;
}
sourceSizeIndex--;
}
if (new MultiStepMigrationTask(validPackages, context).migrate(sourceSize, targetSize)) {
dbChanged = true;
}
if (dbChanged) {
@@ -999,4 +972,55 @@ public class GridSizeMigrationTask {
.updateAndGetActiveSessionCache().keySet());
return validPackages;
}
/**
* Task to run grid migration in multiple steps when the size difference is more than 1.
*/
protected static class MultiStepMigrationTask {
private final HashSet<String> mValidPackages;
private final Context mContext;
public MultiStepMigrationTask(HashSet<String> validPackages, Context context) {
mValidPackages = validPackages;
mContext = context;
}
public boolean migrate(Point sourceSize, Point targetSize) throws Exception {
boolean dbChanged = false;
if (!targetSize.equals(sourceSize)) {
if (sourceSize.x < targetSize.x) {
// Source is smaller that target, just expand the grid without actual migration.
sourceSize.x = targetSize.x;
}
if (sourceSize.y < targetSize.y) {
// Source is smaller that target, just expand the grid without actual migration.
sourceSize.y = targetSize.y;
}
// Migrate the workspace grid, such that the points differ by max 1 in x and y
// each on every step.
while (!targetSize.equals(sourceSize)) {
// Get the next size, such that the points differ by max 1 in x and y each
Point nextSize = new Point(sourceSize);
if (targetSize.x < nextSize.x) {
nextSize.x--;
}
if (targetSize.y < nextSize.y) {
nextSize.y--;
}
if (runStepTask(sourceSize, nextSize)) {
dbChanged = true;
}
sourceSize.set(nextSize.x, nextSize.y);
}
}
return dbChanged;
}
protected boolean runStepTask(Point sourceSize, Point nextSize) throws Exception {
return new GridSizeMigrationTask(mContext,
LauncherAppState.getInstance().getInvariantDeviceProfile(),
mValidPackages, sourceSize, nextSize).migrateWorkspace();
}
}
}