v7/appcompat/src/android/support/v7/app/AppCompatDelegateImplBase.java - platform/frameworks/support.git - Git at Google

 /*
  * Copyright (C) 2013 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package android.support.v7.app;

 import android.app.Activity;
 import android.app.Dialog;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.v7.appcompat.R;
 import android.support.v7.internal.view.SupportMenuInflater;
 import android.support.v7.internal.view.WindowCallbackWrapper;
 import android.support.v7.internal.view.menu.MenuBuilder;
 import android.support.v7.internal.widget.TintTypedArray;
 import android.support.v7.view.ActionMode;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.View;
 import android.view.Window;

 abstract class AppCompatDelegateImplBase extends AppCompatDelegate {

     final Context mContext;
     final Window mWindow;
     final Window.Callback mOriginalWindowCallback;
     final AppCompatCallback mAppCompatCallback;

     private ActionBar mActionBar;
     private MenuInflater mMenuInflater;

     // true if this activity has an action bar.
     boolean mHasActionBar;
     // true if this activity's action bar overlays other activity content.
     boolean mOverlayActionBar;
     // true if this any action modes should overlay the activity content
     boolean mOverlayActionMode;
     // true if this activity is floating (e.g. Dialog)
     boolean mIsFloating;
     // true if this activity has no title
     boolean mWindowNoTitle;

     private CharSequence mTitle;

     private boolean mIsDestroyed;

     AppCompatDelegateImplBase(Context context, Window window, AppCompatCallback callback) {
         mContext = context;
         mWindow = window;
         mAppCompatCallback = callback;

         mOriginalWindowCallback = mWindow.getCallback();
         if (mOriginalWindowCallback instanceof AppCompatWindowCallback) {
             throw new IllegalStateException(
                     "AppCompat has already installed itself into the Window");
         }
         // Now install the new callback
         mWindow.setCallback(new AppCompatWindowCallback(mOriginalWindowCallback));
     }

     abstract ActionBar createSupportActionBar();

     @Override
     public ActionBar getSupportActionBar() {
         // The Action Bar should be lazily created as hasActionBar
         // could change after onCreate
         if (mHasActionBar) {
             if (mActionBar == null) {
                 mActionBar = createSupportActionBar();
             }
         }
         return mActionBar;
     }

     final ActionBar peekSupportActionBar() {
         return mActionBar;
     }

     final void setSupportActionBar(ActionBar actionBar) {
         mActionBar = actionBar;
     }

     @Override
     public MenuInflater getMenuInflater() {
         if (mMenuInflater == null) {
             mMenuInflater = new SupportMenuInflater(getActionBarThemedContext());
         }
         return mMenuInflater;
     }

     @Override
     public void onCreate(Bundle savedInstanceState) {
         TypedArray a = mContext.obtainStyledAttributes(R.styleable.Theme);

         if (!a.hasValue(R.styleable.Theme_windowActionBar)) {
             a.recycle();
             throw new IllegalStateException(
                     "You need to use a Theme.AppCompat theme (or descendant) with this activity.");
         }

         if (a.getBoolean(R.styleable.Theme_windowActionBar, false)) {
             mHasActionBar = true;
         }
         if (a.getBoolean(R.styleable.Theme_windowActionBarOverlay, false)) {
             mOverlayActionBar = true;
         }
         if (a.getBoolean(R.styleable.Theme_windowActionModeOverlay, false)) {
             mOverlayActionMode = true;
         }
         mIsFloating = a.getBoolean(R.styleable.Theme_android_windowIsFloating, false);
         mWindowNoTitle = a.getBoolean(R.styleable.Theme_windowNoTitle, false);
         a.recycle();
     }

     // Methods used to create and respond to options menu
     abstract boolean onPanelClosed(int featureId, Menu menu);

     abstract boolean onMenuOpened(int featureId, Menu menu);

     abstract boolean dispatchKeyEvent(KeyEvent event);

     abstract boolean onKeyShortcut(int keyCode, KeyEvent event);

     @Override
     public final ActionBarDrawerToggle.Delegate getDrawerToggleDelegate() {
         return new ActionBarDrawableToggleImpl();
     }

     final Context getActionBarThemedContext() {
         Context context = null;

         // If we have an action bar, let it return a themed context
         ActionBar ab = getSupportActionBar();
         if (ab != null) {
             context = ab.getThemedContext();
         }

         if (context == null) {
             context = mContext;
         }
         return context;
     }

     private class ActionBarDrawableToggleImpl implements ActionBarDrawerToggle.Delegate {
         @Override
         public Drawable getThemeUpIndicator() {
             final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
                     getActionBarThemedContext(), null, new int[]{ R.attr.homeAsUpIndicator });
             final Drawable result = a.getDrawable(0);
             a.recycle();
             return result;
         }

         @Override
         public Context getActionBarThemedContext() {
             return AppCompatDelegateImplBase.this.getActionBarThemedContext();
         }

         @Override
         public boolean isNavigationVisible() {
             final ActionBar ab = getSupportActionBar();
             return ab != null && (ab.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0;
         }

         @Override
         public void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes) {
             ActionBar ab = getSupportActionBar();
             if (ab != null) {
                 ab.setHomeAsUpIndicator(upDrawable);
                 ab.setHomeActionContentDescription(contentDescRes);
             }
         }

         @Override
         public void setActionBarDescription(int contentDescRes) {
             ActionBar ab = getSupportActionBar();
             if (ab != null) {
                 ab.setHomeActionContentDescription(contentDescRes);
             }
         }
     }

     abstract ActionMode startSupportActionModeFromWindow(ActionMode.Callback callback);

     @Override
     public final void onDestroy() {
         mIsDestroyed = true;
     }

     final boolean isDestroyed() {
         return mIsDestroyed;
     }

     final Window.Callback getWindowCallback() {
         return mWindow.getCallback();
     }

     @Override
     public final void setTitle(CharSequence title) {
         mTitle = title;
         onTitleChanged(title);
     }

     abstract void onTitleChanged(CharSequence title);

     final CharSequence getTitle() {
         // If the original window callback is an Activity, we'll use it's title
         if (mOriginalWindowCallback instanceof Activity) {
             return ((Activity) mOriginalWindowCallback).getTitle();
         }
         // Else, we'll return the title we have recorded ourselves
         return mTitle;
     }

     private class AppCompatWindowCallback extends WindowCallbackWrapper {
         AppCompatWindowCallback(Window.Callback callback) {
             super(callback);
         }

         @Override
         public boolean dispatchKeyEvent(KeyEvent event) {
             if (AppCompatDelegateImplBase.this.dispatchKeyEvent(event)) {
                 return true;
             }
             return super.dispatchKeyEvent(event);
         }

         @Override
         public boolean onCreatePanelMenu(int featureId, Menu menu) {
             if (featureId == Window.FEATURE_OPTIONS_PANEL && !(menu instanceof MenuBuilder)) {
                 // If this is an options menu but it's not an AppCompat menu, we eat the event
                 // and return false
                 return false;
             }
             return super.onCreatePanelMenu(featureId, menu);
         }

         @Override
         public boolean onPreparePanel(int featureId, View view, Menu menu) {
             if (featureId == Window.FEATURE_OPTIONS_PANEL && !(menu instanceof MenuBuilder)) {
                 // If this is an options menu but it's not an AppCompat menu, we eat the event
                 // and return false
                 return false;
             }

             if (featureId == Window.FEATURE_OPTIONS_PANEL && bypassPrepareOptionsPanelIfNeeded()) {
                 // If this is an options menu and we need to bypass onPreparePanel, do so
                 if (mOriginalWindowCallback instanceof Activity) {
                     return ((Activity) mOriginalWindowCallback).onPrepareOptionsMenu(menu);
                 } else if (mOriginalWindowCallback instanceof Dialog) {
                     return ((Dialog) mOriginalWindowCallback).onPrepareOptionsMenu(menu);
                 }
                 return false;
             }

             // Else, defer to the default handling
             return super.onPreparePanel(featureId, view, menu);
         }

         @Override
         public boolean onMenuOpened(int featureId, Menu menu) {
             if (AppCompatDelegateImplBase.this.onMenuOpened(featureId, menu)) {
                 return true;
             }
             return super.onMenuOpened(featureId, menu);
         }

         @Override
         public boolean dispatchKeyShortcutEvent(KeyEvent event) {
             if (AppCompatDelegateImplBase.this.onKeyShortcut(event.getKeyCode(), event)) {
                 return true;
             }
             return super.dispatchKeyShortcutEvent(event);
         }

         @Override
         public void onContentChanged() {
             // We purposely do not propagate this call as this is called when we install
             // our sub-decor rather than the user's content
         }

         @Override
         public void onPanelClosed(int featureId, Menu menu) {
             if (AppCompatDelegateImplBase.this.onPanelClosed(featureId, menu)) {
                 return;
             }
             super.onPanelClosed(featureId, menu);
         }

         /**
          * For the options menu, we may need to call onPrepareOptionsMenu() directly,
          * bypassing onPreparePanel(). This is because onPreparePanel() in certain situations
          * calls menu.hasVisibleItems(), which interferes with any initial invisible items.
          *
          * @return true if onPrepareOptionsMenu should be called directly.
          */
         private boolean bypassPrepareOptionsPanelIfNeeded() {
             if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN
                     && mOriginalWindowCallback instanceof Activity) {
                 // For Activities, we only need to bypass onPreparePanel if we're running pre-JB
                 return true;
             } else if (mOriginalWindowCallback instanceof Dialog) {
                 // For Dialogs, we always need to bypass onPreparePanel
                 return true;
             }
             return false;
         }
     }
 }
	/*
	* Copyright (C) 2013 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package android.support.v7.app;

	import android.app.Activity;
	import android.app.Dialog;
	import android.content.Context;
	import android.content.res.TypedArray;
	import android.graphics.drawable.Drawable;
	import android.os.Build;
	import android.os.Bundle;
	import android.support.v7.appcompat.R;
	import android.support.v7.internal.view.SupportMenuInflater;
	import android.support.v7.internal.view.WindowCallbackWrapper;
	import android.support.v7.internal.view.menu.MenuBuilder;
	import android.support.v7.internal.widget.TintTypedArray;
	import android.support.v7.view.ActionMode;
	import android.view.KeyEvent;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.View;
	import android.view.Window;

	abstract class AppCompatDelegateImplBase extends AppCompatDelegate {

	final Context mContext;
	final Window mWindow;
	final Window.Callback mOriginalWindowCallback;
	final AppCompatCallback mAppCompatCallback;

	private ActionBar mActionBar;
	private MenuInflater mMenuInflater;

	// true if this activity has an action bar.
	boolean mHasActionBar;
	// true if this activity's action bar overlays other activity content.
	boolean mOverlayActionBar;
	// true if this any action modes should overlay the activity content
	boolean mOverlayActionMode;
	// true if this activity is floating (e.g. Dialog)
	boolean mIsFloating;
	// true if this activity has no title
	boolean mWindowNoTitle;

	private CharSequence mTitle;

	private boolean mIsDestroyed;

	AppCompatDelegateImplBase(Context context, Window window, AppCompatCallback callback) {
	mContext = context;
	mWindow = window;
	mAppCompatCallback = callback;

	mOriginalWindowCallback = mWindow.getCallback();
	if (mOriginalWindowCallback instanceof AppCompatWindowCallback) {
	throw new IllegalStateException(
	"AppCompat has already installed itself into the Window");
	}
	// Now install the new callback
	mWindow.setCallback(new AppCompatWindowCallback(mOriginalWindowCallback));
	}

	abstract ActionBar createSupportActionBar();

	@Override
	public ActionBar getSupportActionBar() {
	// The Action Bar should be lazily created as hasActionBar
	// could change after onCreate
	if (mHasActionBar) {
	if (mActionBar == null) {
	mActionBar = createSupportActionBar();
	}
	}
	return mActionBar;
	}

	final ActionBar peekSupportActionBar() {
	return mActionBar;
	}

	final void setSupportActionBar(ActionBar actionBar) {
	mActionBar = actionBar;
	}

	@Override
	public MenuInflater getMenuInflater() {
	if (mMenuInflater == null) {
	mMenuInflater = new SupportMenuInflater(getActionBarThemedContext());
	}
	return mMenuInflater;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
	TypedArray a = mContext.obtainStyledAttributes(R.styleable.Theme);

	if (!a.hasValue(R.styleable.Theme_windowActionBar)) {
	a.recycle();
	throw new IllegalStateException(
	"You need to use a Theme.AppCompat theme (or descendant) with this activity.");
	}

	if (a.getBoolean(R.styleable.Theme_windowActionBar, false)) {
	mHasActionBar = true;
	}
	if (a.getBoolean(R.styleable.Theme_windowActionBarOverlay, false)) {
	mOverlayActionBar = true;
	}
	if (a.getBoolean(R.styleable.Theme_windowActionModeOverlay, false)) {
	mOverlayActionMode = true;
	}
	mIsFloating = a.getBoolean(R.styleable.Theme_android_windowIsFloating, false);
	mWindowNoTitle = a.getBoolean(R.styleable.Theme_windowNoTitle, false);
	a.recycle();
	}

	// Methods used to create and respond to options menu
	abstract boolean onPanelClosed(int featureId, Menu menu);

	abstract boolean onMenuOpened(int featureId, Menu menu);

	abstract boolean dispatchKeyEvent(KeyEvent event);

	abstract boolean onKeyShortcut(int keyCode, KeyEvent event);

	@Override
	public final ActionBarDrawerToggle.Delegate getDrawerToggleDelegate() {
	return new ActionBarDrawableToggleImpl();
	}

	final Context getActionBarThemedContext() {
	Context context = null;

	// If we have an action bar, let it return a themed context
	ActionBar ab = getSupportActionBar();
	if (ab != null) {
	context = ab.getThemedContext();
	}

	if (context == null) {
	context = mContext;
	}
	return context;
	}

	private class ActionBarDrawableToggleImpl implements ActionBarDrawerToggle.Delegate {
	@Override
	public Drawable getThemeUpIndicator() {
	final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
	getActionBarThemedContext(), null, new int[]{ R.attr.homeAsUpIndicator });
	final Drawable result = a.getDrawable(0);
	a.recycle();
	return result;
	}

	@Override
	public Context getActionBarThemedContext() {
	return AppCompatDelegateImplBase.this.getActionBarThemedContext();
	}

	@Override
	public boolean isNavigationVisible() {
	final ActionBar ab = getSupportActionBar();
	return ab != null && (ab.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0;
	}

	@Override
	public void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes) {
	ActionBar ab = getSupportActionBar();
	if (ab != null) {
	ab.setHomeAsUpIndicator(upDrawable);
	ab.setHomeActionContentDescription(contentDescRes);
	}
	}

	@Override
	public void setActionBarDescription(int contentDescRes) {
	ActionBar ab = getSupportActionBar();
	if (ab != null) {
	ab.setHomeActionContentDescription(contentDescRes);
	}
	}
	}

	abstract ActionMode startSupportActionModeFromWindow(ActionMode.Callback callback);

	@Override
	public final void onDestroy() {
	mIsDestroyed = true;
	}

	final boolean isDestroyed() {
	return mIsDestroyed;
	}

	final Window.Callback getWindowCallback() {
	return mWindow.getCallback();
	}

	@Override
	public final void setTitle(CharSequence title) {
	mTitle = title;
	onTitleChanged(title);
	}

	abstract void onTitleChanged(CharSequence title);

	final CharSequence getTitle() {
	// If the original window callback is an Activity, we'll use it's title
	if (mOriginalWindowCallback instanceof Activity) {
	return ((Activity) mOriginalWindowCallback).getTitle();
	}
	// Else, we'll return the title we have recorded ourselves
	return mTitle;
	}

	private class AppCompatWindowCallback extends WindowCallbackWrapper {
	AppCompatWindowCallback(Window.Callback callback) {
	super(callback);
	}

	@Override
	public boolean dispatchKeyEvent(KeyEvent event) {
	if (AppCompatDelegateImplBase.this.dispatchKeyEvent(event)) {
	return true;
	}
	return super.dispatchKeyEvent(event);
	}

	@Override
	public boolean onCreatePanelMenu(int featureId, Menu menu) {
	if (featureId == Window.FEATURE_OPTIONS_PANEL && !(menu instanceof MenuBuilder)) {
	// If this is an options menu but it's not an AppCompat menu, we eat the event
	// and return false
	return false;
	}
	return super.onCreatePanelMenu(featureId, menu);
	}

	@Override
	public boolean onPreparePanel(int featureId, View view, Menu menu) {
	if (featureId == Window.FEATURE_OPTIONS_PANEL && !(menu instanceof MenuBuilder)) {
	// If this is an options menu but it's not an AppCompat menu, we eat the event
	// and return false
	return false;
	}

	if (featureId == Window.FEATURE_OPTIONS_PANEL && bypassPrepareOptionsPanelIfNeeded()) {
	// If this is an options menu and we need to bypass onPreparePanel, do so
	if (mOriginalWindowCallback instanceof Activity) {
	return ((Activity) mOriginalWindowCallback).onPrepareOptionsMenu(menu);
	} else if (mOriginalWindowCallback instanceof Dialog) {
	return ((Dialog) mOriginalWindowCallback).onPrepareOptionsMenu(menu);
	}
	return false;
	}

	// Else, defer to the default handling
	return super.onPreparePanel(featureId, view, menu);
	}

	@Override
	public boolean onMenuOpened(int featureId, Menu menu) {
	if (AppCompatDelegateImplBase.this.onMenuOpened(featureId, menu)) {
	return true;
	}
	return super.onMenuOpened(featureId, menu);
	}

	@Override
	public boolean dispatchKeyShortcutEvent(KeyEvent event) {
	if (AppCompatDelegateImplBase.this.onKeyShortcut(event.getKeyCode(), event)) {
	return true;
	}
	return super.dispatchKeyShortcutEvent(event);
	}

	@Override
	public void onContentChanged() {
	// We purposely do not propagate this call as this is called when we install
	// our sub-decor rather than the user's content
	}

	@Override
	public void onPanelClosed(int featureId, Menu menu) {
	if (AppCompatDelegateImplBase.this.onPanelClosed(featureId, menu)) {
	return;
	}
	super.onPanelClosed(featureId, menu);
	}

	/**
	* For the options menu, we may need to call onPrepareOptionsMenu() directly,
	* bypassing onPreparePanel(). This is because onPreparePanel() in certain situations
	* calls menu.hasVisibleItems(), which interferes with any initial invisible items.
	*
	* @return true if onPrepareOptionsMenu should be called directly.
	*/
	private boolean bypassPrepareOptionsPanelIfNeeded() {
	if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN
	&& mOriginalWindowCallback instanceof Activity) {
	// For Activities, we only need to bypass onPreparePanel if we're running pre-JB
	return true;
	} else if (mOriginalWindowCallback instanceof Dialog) {
	// For Dialogs, we always need to bypass onPreparePanel
	return true;
	}
	return false;
	}
	}
	}