Merge "Add workspace page translations for edit state." into tm-dev

src/com/android/launcher3/LauncherState.java

@@ -16,6 +16,7 @@
 package com.android.launcher3;
 
 import static com.android.launcher3.anim.Interpolators.ACCEL_2;
+import static com.android.launcher3.anim.Interpolators.DEACCEL_2;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_OVERVIEW;
 import static com.android.launcher3.testing.TestProtocol.ALL_APPS_STATE_ORDINAL;
@@ -91,6 +92,14 @@ public abstract class LauncherState implements BaseState<LauncherState> {
                 }
             };
 
+    protected static final PageTranslationProvider DEFAULT_PAGE_TRANSLATION_PROVIDER =
+            new PageTranslationProvider(DEACCEL_2) {
+                @Override
+                public float getPageTranslation(int pageIndex) {
+                    return 0;
+                }
+            };
+
     private static final LauncherState[] sAllStates = new LauncherState[10];
 
     /**
@@ -288,6 +297,25 @@ public abstract class LauncherState implements BaseState<LauncherState> {
         };
     }
 
+    /**
+     * Gets the translation provider for workspace pages.
+     */
+    public PageTranslationProvider getWorkspacePageTranslationProvider(Launcher launcher) {
+        if (this != SPRING_LOADED || !launcher.getDeviceProfile().isTwoPanels) {
+            return DEFAULT_PAGE_TRANSLATION_PROVIDER;
+        }
+        final float quarterPageSpacing = launcher.getWorkspace().getPageSpacing() / 4f;
+        return new PageTranslationProvider(DEACCEL_2) {
+            @Override
+            public float getPageTranslation(int pageIndex) {
+                boolean isRtl = launcher.getWorkspace().mIsRtl;
+                boolean isFirstPage = pageIndex % 2 == 0;
+                return ((isFirstPage && !isRtl) || (!isFirstPage && isRtl)) ? -quarterPageSpacing
+                        : quarterPageSpacing;
+            }
+        };
+    }
+
     @Override
     public LauncherState getHistoryForState(LauncherState previousState) {
         // No history is supported
@@ -318,6 +346,23 @@ public abstract class LauncherState implements BaseState<LauncherState> {
         public abstract float getPageAlpha(int pageIndex);
     }
 
+    /**
+     * Provider for the translation and animation interpolation of workspace pages.
+     */
+    public abstract static class PageTranslationProvider {
+
+        public final Interpolator interpolator;
+
+        public PageTranslationProvider(Interpolator interpolator) {
+            this.interpolator = interpolator;
+        }
+
+        /**
+         * Gets the translation of the workspace page at the provided page index.
+         */
+        public abstract float getPageTranslation(int pageIndex);
+    }
+
     public static class ScaleAndTranslation {
         public float scale;
         public float translationX;

src/com/android/launcher3/WorkspaceStateTransitionAnimation.java

@@ -39,6 +39,7 @@ import static com.android.launcher3.states.StateAnimationConfig.ANIM_HOTSEAT_SCA
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_HOTSEAT_TRANSLATE;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_SCRIM_FADE;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_FADE;
+import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_PAGE_TRANSLATE_X;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_SCALE;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_TRANSLATE;
 import static com.android.launcher3.states.StateAnimationConfig.SKIP_SCRIM;
@@ -49,6 +50,7 @@ import android.view.View;
 import android.view.animation.Interpolator;
 
 import com.android.launcher3.LauncherState.PageAlphaProvider;
+import com.android.launcher3.LauncherState.PageTranslationProvider;
 import com.android.launcher3.LauncherState.ScaleAndTranslation;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.anim.PropertySetter;
@@ -155,6 +157,12 @@ public class WorkspaceStateTransitionAnimation {
                 scaleAndTranslation.translationX, translationInterpolator);
         propertySetter.setFloat(mWorkspace, VIEW_TRANSLATE_Y,
                 scaleAndTranslation.translationY, translationInterpolator);
+        PageTranslationProvider pageTranslationProvider = state.getWorkspacePageTranslationProvider(
+                mLauncher);
+        for (int i = 0; i < childCount; i++) {
+            applyPageTranslation((CellLayout) mWorkspace.getChildAt(i), i, pageTranslationProvider,
+                    propertySetter, config);
+        }
 
         Interpolator hotseatTranslationInterpolator = config.getInterpolator(
                 ANIM_HOTSEAT_TRANSLATE, translationInterpolator);
@@ -202,6 +210,16 @@ public class WorkspaceStateTransitionAnimation {
                 pageAlpha, fadeInterpolator);
     }
 
+    private void applyPageTranslation(CellLayout cellLayout, int childIndex,
+            PageTranslationProvider pageTranslationProvider, PropertySetter propertySetter,
+            StateAnimationConfig config) {
+        float pageTranslation = pageTranslationProvider.getPageTranslation(childIndex);
+        Interpolator translationInterpolator = config.getInterpolator(
+                ANIM_WORKSPACE_PAGE_TRANSLATE_X, pageTranslationProvider.interpolator);
+        propertySetter.setFloat(cellLayout, VIEW_TRANSLATE_X, pageTranslation,
+                translationInterpolator);
+    }
+
     /**
      * Returns a spring based animator for the scale property of {@param workspace}.
      */

src/com/android/launcher3/states/StateAnimationConfig.java

@@ -62,6 +62,7 @@ public class StateAnimationConfig {
             ANIM_OVERVIEW_MODAL,
             ANIM_DEPTH,
             ANIM_OVERVIEW_ACTIONS_FADE,
+            ANIM_WORKSPACE_PAGE_TRANSLATE_X,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface AnimType {}
@@ -80,8 +81,9 @@ public class StateAnimationConfig {
     public static final int ANIM_OVERVIEW_MODAL = 12;
     public static final int ANIM_DEPTH = 13;
     public static final int ANIM_OVERVIEW_ACTIONS_FADE = 14;
+    public static final int ANIM_WORKSPACE_PAGE_TRANSLATE_X = 15;
 
-    private static final int ANIM_TYPES_COUNT = 15;
+    private static final int ANIM_TYPES_COUNT = 16;
 
     protected final Interpolator[] mInterpolators = new Interpolator[ANIM_TYPES_COUNT];