Calculate sizes for responsive grid

This shouldn't change anything in the grids, only calculate the sizes of the grid.

Bug: 277064708
Test: CalculatedWorkspaceSpecTest
Test: WorkspaceSpecsTest
Flag: ENABLE_RESPONSIVE_WORKSPACE
Change-Id: Id1f90ef44f5b869113d063bad17589e7e88d1d20
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 0231090..fb41044 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -55,7 +55,10 @@
 import com.android.launcher3.uioverrides.ApiWrapper;
 import com.android.launcher3.util.DisplayController;
 import com.android.launcher3.util.DisplayController.Info;
+import com.android.launcher3.util.ResourceHelper;
 import com.android.launcher3.util.WindowBounds;
+import com.android.launcher3.workspace.CalculatedWorkspaceSpec;
+import com.android.launcher3.workspace.WorkspaceSpecs;
 
 import java.io.PrintWriter;
 import java.util.Locale;
@@ -101,9 +104,14 @@
     public final float aspectRatio;
 
     public final boolean isScalableGrid;
-    public final boolean isResponsiveGrid;
     private final int mTypeIndex;
 
+    // Responsive grid
+    private final boolean mIsResponsiveGrid;
+    private WorkspaceSpecs mWorkspaceSpecs;
+    private CalculatedWorkspaceSpec mResponsiveWidthSpec;
+    private CalculatedWorkspaceSpec mResponsiveHeightSpec;
+
     /**
      * The maximum amount of left/right workspace padding as a percentage of the screen width.
      * To be clear, this means that up to 7% of the screen width can be used as left padding, and
@@ -294,9 +302,8 @@
         this.rotationHint = windowBounds.rotationHint;
         mInsets.set(windowBounds.insets);
 
-        // TODO(b/241386436):
-        //  for testing that the flag works only, shouldn't change any launcher behaviour
-        isResponsiveGrid = inv.workspaceSpecsId != INVALID_RESOURCE_HANDLE;
+        // TODO(b/241386436): shouldn't change any launcher behaviour
+        mIsResponsiveGrid = inv.workspaceSpecsId != INVALID_RESOURCE_HANDLE;
 
         isScalableGrid = inv.isScalable && !isVerticalBarLayout() && !isMultiWindowMode;
         // Determine device posture.
@@ -335,6 +342,14 @@
             }
         }
 
+        if (mIsResponsiveGrid) {
+            mWorkspaceSpecs = new WorkspaceSpecs(new ResourceHelper(context, inv.workspaceSpecsId));
+            mResponsiveWidthSpec = mWorkspaceSpecs.getCalculatedWidthSpec(inv.numColumns,
+                    availableWidthPx);
+            mResponsiveHeightSpec = mWorkspaceSpecs.getCalculatedHeightSpec(inv.numRows,
+                    availableHeightPx);
+        }
+
         if (DisplayController.isTransientTaskbar(context)) {
             float invTransientIconSizeDp = inv.transientTaskbarIconSize[mTypeIndex];
             taskbarIconSize = pxFromDp(invTransientIconSizeDp, mMetrics);
@@ -1582,7 +1597,7 @@
 
         writer.println(prefix + "\taspectRatio:" + aspectRatio);
 
-        writer.println(prefix + "\tisResponsiveGrid:" + isResponsiveGrid);
+        writer.println(prefix + "\tisResponsiveGrid:" + mIsResponsiveGrid);
         writer.println(prefix + "\tisScalableGrid:" + isScalableGrid);
 
         writer.println(prefix + "\tinv.numRows: " + inv.numRows);