Implement Mixins for Templates

Implement Mixin functionalities, which defines part of a template
layout, making it reusable in different layouts. For example, the
HeaderMixin allows setting and getting the header text via the mixin,
which allows for clients which uses multiple different layuots to
simplify their code via something like
     layout.getMixin(HeaderMixin.class).setText("Foobar");

Bug: 34163318
Test: ./gradlew connectedAndroidTest
Change-Id: I4348c8bb5b8e640b49c2be0c79c70aa85cf0ebc0

1 files changed, 16 insertions, 59 deletions

diff --git a/library/main/src/com/android/setupwizardlib/SetupWizardLayout.java b/library/main/src/com/android/setupwizardlib/SetupWizardLayout.java
index 79d9222..c30a12d 100644
--- a/library/main/src/com/android/setupwizardlib/SetupWizardLayout.java
+++ b/library/main/src/com/android/setupwizardlib/SetupWizardLayout.java
@@ -37,11 +37,12 @@ import android.view.InflateException;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.ViewStub;
-import android.widget.ProgressBar;
 import android.widget.ScrollView;
 import android.widget.TextView;
 
+import com.android.setupwizardlib.template.HeaderMixin;
+import com.android.setupwizardlib.template.NavigationBarMixin;
+import com.android.setupwizardlib.template.ProgressBarMixin;
 import com.android.setupwizardlib.util.RequireScrollHelper;
 import com.android.setupwizardlib.view.BottomScrollView;
 import com.android.setupwizardlib.view.Illustration;
@@ -51,8 +52,6 @@ public class SetupWizardLayout extends TemplateLayout {
 
     private static final String TAG = "SetupWizardLayout";
 
-    private ColorStateList mProgressBarColor;
-
     public SetupWizardLayout(Context context) {
         super(context, 0, 0);
         init(null, R.attr.suwLayoutTheme);
@@ -81,6 +80,10 @@ public class SetupWizardLayout extends TemplateLayout {
     // All the constructors delegate to this init method. The 3-argument constructor is not
     // available in LinearLayout before v11, so call super with the exact same arguments.
     private void init(AttributeSet attrs, int defStyleAttr) {
+        registerMixin(HeaderMixin.class, new HeaderMixin(this, attrs, defStyleAttr));
+        registerMixin(ProgressBarMixin.class, new ProgressBarMixin(this));
+        registerMixin(NavigationBarMixin.class, new NavigationBarMixin(this));
+
         final TypedArray a = getContext().obtainStyledAttributes(attrs,
                 R.styleable.SuwSetupWizardLayout, defStyleAttr, 0);
 
@@ -132,13 +135,6 @@ public class SetupWizardLayout extends TemplateLayout {
         }
         setIllustrationAspectRatio(illustrationAspectRatio);
 
-        // Set the header text
-        final CharSequence headerText =
-                a.getText(R.styleable.SuwSetupWizardLayout_suwHeaderText);
-        if (headerText != null) {
-            setHeaderText(headerText);
-        }
-
         a.recycle();
     }
 
@@ -192,8 +188,7 @@ public class SetupWizardLayout extends TemplateLayout {
     }
 
     public NavigationBar getNavigationBar() {
-        final View view = findManagedViewById(R.id.suw_layout_navigation_bar);
-        return view instanceof NavigationBar ? (NavigationBar) view : null;
+        return getMixin(NavigationBarMixin.class).getNavigationBar();
     }
 
     public ScrollView getScrollView() {
@@ -213,26 +208,19 @@ public class SetupWizardLayout extends TemplateLayout {
     }
 
     public void setHeaderText(int title) {
-        final TextView titleView = getHeaderTextView();
-        if (titleView != null) {
-            titleView.setText(title);
-        }
+        getMixin(HeaderMixin.class).setText(title);
     }
 
     public void setHeaderText(CharSequence title) {
-        final TextView titleView = getHeaderTextView();
-        if (titleView != null) {
-            titleView.setText(title);
-        }
+        getMixin(HeaderMixin.class).setText(title);
     }
 
     public CharSequence getHeaderText() {
-        final TextView titleView = getHeaderTextView();
-        return titleView != null ? titleView.getText() : null;
+        return getMixin(HeaderMixin.class).getText();
     }
 
     public TextView getHeaderTextView() {
-        return (TextView) findManagedViewById(R.id.suw_layout_title);
+        return getMixin(HeaderMixin.class).getTextView();
     }
 
     /**
@@ -375,18 +363,8 @@ public class SetupWizardLayout extends TemplateLayout {
         }
     }
 
-    /**
-     * Same as {@link android.view.View#findViewById(int)}, but may include views that are managed
-     * by this view but not currently added to the view hierarchy. e.g. recycler view or list view
-     * headers that are not currently shown.
-     */
-    protected View findManagedViewById(int id) {
-        return findViewById(id);
-    }
-
     public boolean isProgressBarShown() {
-        final View progressBar = findManagedViewById(R.id.suw_layout_progress);
-        return progressBar != null && progressBar.getVisibility() == View.VISIBLE;
+        return getMixin(ProgressBarMixin.class).isShown();
     }
 
     /**
@@ -395,19 +373,7 @@ public class SetupWizardLayout extends TemplateLayout {
      * view hierarchy until the first time this is set to {@code true}.
      */
     public void setProgressBarShown(boolean shown) {
-        final View progressBar = findManagedViewById(R.id.suw_layout_progress);
-        if (progressBar != null) {
-            progressBar.setVisibility(shown ? View.VISIBLE : View.GONE);
-        } else if (shown) {
-            final ViewStub progressBarStub =
-                    (ViewStub) findManagedViewById(R.id.suw_layout_progress_stub);
-            if (progressBarStub != null) {
-                progressBarStub.inflate();
-            }
-            if (mProgressBarColor != null) {
-                setProgressBarColor(mProgressBarColor);
-            }
-        }
+        getMixin(ProgressBarMixin.class).setShown(shown);
     }
 
     /**
@@ -427,20 +393,11 @@ public class SetupWizardLayout extends TemplateLayout {
     }
 
     public void setProgressBarColor(ColorStateList color) {
-        mProgressBarColor = color;
-        if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
-            // Suppress lint error caused by
-            // https://code.google.com/p/android/issues/detail?id=183136
-            // noinspection AndroidLintWrongViewCast
-            final ProgressBar bar = (ProgressBar) findViewById(R.id.suw_layout_progress);
-            if (bar != null) {
-                bar.setIndeterminateTintList(color);
-            }
-        }
+        getMixin(ProgressBarMixin.class).setColor(color);
     }
 
     public ColorStateList getProgressBarColor() {
-        return mProgressBarColor;
+        return getMixin(ProgressBarMixin.class).getColor();
     }
 
     /* Misc */