Revert "Update app icon shadows"

Revert submission 17935777-lightDarkDetection

Reason for revert: Talked with Adam Cohen, white shadows are controverstial and we'd need to escalate to senior UX if we want to ship. James would rather do it in U timeframe, will flag to UXers we work with that the opportunity to escalate is available if needed.
Reverted Changes:
Ia91221427:Update light/dark detection.
Ie12d3d054:Update app icon shadows
Icc88c3496:Update smartspace shadow

Change-Id: I8bc90e79073b8e088f2912fef2af4c6c99a33553
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 87b8fd7..864bb58 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -44,9 +44,9 @@
         <item name="isMainColorDark">false</item>
         <item name="isWorkspaceDarkText">false</item>
         <item name="workspaceTextColor">@color/workspace_text_color_light</item>
-        <item name="workspaceShadowColor">#ff000000</item>
-        <item name="workspaceAmbientShadowColor">#33000000</item>
-        <item name="workspaceKeyShadowColor">#ff000000</item>
+        <item name="workspaceShadowColor">#B0000000</item>
+        <item name="workspaceAmbientShadowColor">#40000000</item>
+        <item name="workspaceKeyShadowColor">#89000000</item>
         <item name="workspaceStatusBarScrim">@drawable/workspace_bg</item>
         <item name="widgetsTheme">@style/WidgetContainerTheme</item>
         <item name="folderDotColor">@color/folder_dot_color</item>
@@ -82,9 +82,9 @@
 
     <style name="LauncherTheme.DarkText" parent="@style/LauncherTheme">
         <item name="workspaceTextColor">@color/workspace_text_color_dark</item>
-        <item name="workspaceShadowColor">#ffffffff</item>
-        <item name="workspaceAmbientShadowColor">#33ffffff</item>
-        <item name="workspaceKeyShadowColor">#ffffffff</item>
+        <item name="workspaceShadowColor">@android:color/transparent</item>
+        <item name="workspaceAmbientShadowColor">@android:color/transparent</item>
+        <item name="workspaceKeyShadowColor">@android:color/transparent</item>
         <item name="isWorkspaceDarkText">true</item>
         <item name="workspaceStatusBarScrim">@null</item>
         <item name="workspaceAccentColor">@color/workspace_accent_color_dark</item>
@@ -132,9 +132,9 @@
     <style name="LauncherTheme.Dark.DarkText" parent="@style/LauncherTheme.Dark">
         <item name="android:colorControlHighlight">#19212121</item>
         <item name="workspaceTextColor">@color/workspace_text_color_dark</item>
-        <item name="workspaceShadowColor">#ffffffff</item>
-        <item name="workspaceAmbientShadowColor">#33ffffff</item>
-        <item name="workspaceKeyShadowColor">#ffffffff</item>
+        <item name="workspaceShadowColor">@android:color/transparent</item>
+        <item name="workspaceAmbientShadowColor">@android:color/transparent</item>
+        <item name="workspaceKeyShadowColor">@android:color/transparent</item>
         <item name="isWorkspaceDarkText">true</item>
         <item name="workspaceStatusBarScrim">@null</item>
         <item name="workspaceAccentColor">@color/workspace_accent_color_dark</item>
@@ -250,14 +250,14 @@
 
     <!-- Icon displayed on the workspace -->
     <style name="BaseIcon.Workspace.Shadows" parent="BaseIcon">
-        <item name="android:shadowRadius">1.0</item>
+        <item name="android:shadowRadius">2.0</item>
         <item name="android:shadowColor">?attr/workspaceShadowColor</item>
         <item name="ambientShadowColor">?attr/workspaceAmbientShadowColor</item>
-        <item name="ambientShadowBlur">1.0dp</item>
+        <item name="ambientShadowBlur">1.5dp</item>
         <item name="keyShadowColor">?attr/workspaceKeyShadowColor</item>
-        <item name="keyShadowBlur">1.0dp</item>
-        <item name="keyShadowOffsetX">0dp</item>
-        <item name="keyShadowOffsetY">0dp</item>
+        <item name="keyShadowBlur">.5dp</item>
+        <item name="keyShadowOffsetX">.5dp</item>
+        <item name="keyShadowOffsetY">.5dp</item>
     </style>
 
     <!-- Intentionally empty so we can override -->
diff --git a/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java b/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java
index 374555c..a309e6e 100644
--- a/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java
+++ b/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.views;
 
+import static com.android.launcher3.icons.GraphicsUtils.setColorAlphaBound;
+
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
@@ -54,10 +56,11 @@
             super.onDraw(canvas);
             return;
         }
+        int alpha = Color.alpha(getCurrentTextColor());
 
         // We enhance the shadow by drawing the shadow twice
         getPaint().setShadowLayer(mShadowInfo.ambientShadowBlur, 0, 0,
-                mShadowInfo.ambientShadowColor);
+                getTextShadowColor(mShadowInfo.ambientShadowColor, alpha));
 
         drawWithoutDot(canvas);
         canvas.save();
@@ -69,7 +72,7 @@
                 mShadowInfo.keyShadowBlur,
                 mShadowInfo.keyShadowOffsetX,
                 mShadowInfo.keyShadowOffsetY,
-                mShadowInfo.keyShadowColor);
+                getTextShadowColor(mShadowInfo.keyShadowColor, alpha));
         drawWithoutDot(canvas);
         canvas.restore();
 
@@ -110,18 +113,24 @@
                 return true;
             } else if (ambientShadowAlpha > 0 && keyShadowAlpha == 0) {
                 textView.getPaint().setShadowLayer(ambientShadowBlur, 0, 0,
-                        ambientShadowColor);
+                        getTextShadowColor(ambientShadowColor, textAlpha));
                 return true;
             } else if (keyShadowAlpha > 0 && ambientShadowAlpha == 0) {
                 textView.getPaint().setShadowLayer(
                         keyShadowBlur,
                         keyShadowOffsetX,
                         keyShadowOffsetY,
-                        keyShadowColor);
+                        getTextShadowColor(keyShadowColor, textAlpha));
                 return true;
             } else {
                 return false;
             }
         }
     }
+
+    // Multiplies the alpha of shadowColor by textAlpha.
+    private static int getTextShadowColor(int shadowColor, int textAlpha) {
+        return setColorAlphaBound(shadowColor,
+                Math.round(Color.alpha(shadowColor) * textAlpha / 255f));
+    }
 }