src/com/android/quicksearchbox/ui/DefaultSuggestionView.java - platform/packages/apps/QuickSearchBox - Git at Google

 /*
  * Copyright (C) 2009 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 com.android.quicksearchbox.ui;

 import com.android.quicksearchbox.R;
 import com.android.quicksearchbox.Source;
 import com.android.quicksearchbox.Suggestion;
 import com.android.quicksearchbox.util.Consumer;
 import com.android.quicksearchbox.util.NowOrLater;

 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.text.Html;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.TextUtils;
 import android.text.style.TextAppearanceSpan;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;

 /**
  * View for the items in the suggestions list. This includes promoted suggestions,
  * sources, and suggestions under each source.
  */
 public class DefaultSuggestionView extends BaseSuggestionView {

     private static final boolean DBG = false;

     private static final String VIEW_ID = "default";

     private final String TAG = "QSB.DefaultSuggestionView";

     private AsyncIcon mAsyncIcon1;
     private AsyncIcon mAsyncIcon2;

     public DefaultSuggestionView(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
     }

     public DefaultSuggestionView(Context context, AttributeSet attrs) {
         super(context, attrs);
     }

     public DefaultSuggestionView(Context context) {
         super(context);
     }

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mText1 = (TextView) findViewById(R.id.text1);
         mText2 = (TextView) findViewById(R.id.text2);
         mAsyncIcon1 = new AsyncIcon(mIcon1) {
             // override default icon (when no other available) with default source icon
             @Override
             protected String getFallbackIconId(Source source) {
                 return source.getSourceIconUri().toString();
             }
             @Override
             protected Drawable getFallbackIcon(Source source) {
                 return source.getSourceIcon();
             }
         };
         mAsyncIcon2 = new AsyncIcon(mIcon2);
     }

     @Override
     public void bindAsSuggestion(Suggestion suggestion, String userQuery) {
         super.bindAsSuggestion(suggestion, userQuery);

         CharSequence text1 = formatText(suggestion.getSuggestionText1(), suggestion);
         CharSequence text2 = suggestion.getSuggestionText2Url();
         if (text2 != null) {
             text2 = formatUrl(text2);
         } else {
             text2 = formatText(suggestion.getSuggestionText2(), suggestion);
         }
         // If there is no text for the second line, allow the first line to be up to two lines
         if (TextUtils.isEmpty(text2)) {
             mText1.setSingleLine(false);
             mText1.setMaxLines(2);
             mText1.setEllipsize(TextUtils.TruncateAt.START);
         } else {
             mText1.setSingleLine(true);
             mText1.setMaxLines(1);
             mText1.setEllipsize(TextUtils.TruncateAt.MIDDLE);
         }
         setText1(text1);
         setText2(text2);
         mAsyncIcon1.set(suggestion.getSuggestionSource(), suggestion.getSuggestionIcon1());
         mAsyncIcon2.set(suggestion.getSuggestionSource(), suggestion.getSuggestionIcon2());

         if (DBG) {
             Log.d(TAG, "bindAsSuggestion(), text1=" + text1 + ",text2=" + text2 + ",q='" +
                     userQuery + ",fromHistory=" + isFromHistory(suggestion));
         }
     }

     private CharSequence formatUrl(CharSequence url) {
         SpannableString text = new SpannableString(url);
         ColorStateList colors = getResources().getColorStateList(R.color.url_text);
         text.setSpan(new TextAppearanceSpan(null, 0, 0, colors, null),
                 0, url.length(),
                 Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
         return text;
     }

     private CharSequence formatText(String str, Suggestion suggestion) {
         boolean isHtml = "html".equals(suggestion.getSuggestionFormat());
         if (isHtml && looksLikeHtml(str)) {
             return Html.fromHtml(str);
         } else {
             return str;
         }
     }

     private boolean looksLikeHtml(String str) {
         if (TextUtils.isEmpty(str)) return false;
         for (int i = str.length() - 1; i >= 0; i--) {
             char c = str.charAt(i);
             if (c == '>' || c == '&') return true;
         }
         return false;
     }

     /**
      * Sets the drawable in an image view, makes sure the view is only visible if there
      * is a drawable.
      */
     private static void setViewDrawable(ImageView v, Drawable drawable) {
         // Set the icon even if the drawable is null, since we need to clear any
         // previous icon.
         v.setImageDrawable(drawable);

         if (drawable == null) {
             v.setVisibility(View.GONE);
         } else {
             v.setVisibility(View.VISIBLE);

             // This is a hack to get any animated drawables (like a 'working' spinner)
             // to animate. You have to setVisible true on an AnimationDrawable to get
             // it to start animating, but it must first have been false or else the
             // call to setVisible will be ineffective. We need to clear up the story
             // about animated drawables in the future, see http://b/1878430.
             drawable.setVisible(false, false);
             drawable.setVisible(true, false);
         }
     }

     private class AsyncIcon {
         private final ImageView mView;
         private String mCurrentId;
         private String mWantedId;

         public AsyncIcon(ImageView view) {
             mView = view;
         }

         public void set(final Source source, final String sourceIconId) {
             if (sourceIconId != null) {
                 // The iconId can just be a package-relative resource ID, which may overlap with
                 // other packages. Make sure it's globally unique.
                 Uri iconUri = source.getIconUri(sourceIconId);
                 final String uniqueIconId = iconUri == null ? null : iconUri.toString();
                 mWantedId = uniqueIconId;
                 if (!TextUtils.equals(mWantedId, mCurrentId)) {
                     if (DBG) Log.d(TAG, "getting icon Id=" + uniqueIconId);
                     NowOrLater<Drawable> icon = source.getIcon(sourceIconId);
                     if (icon.haveNow()) {
                         if (DBG) Log.d(TAG, "getIcon ready now");
                         handleNewDrawable(icon.getNow(), uniqueIconId, source);
                     } else {
                         // make sure old icon is not visible while new one is loaded
                         if (DBG) Log.d(TAG , "getIcon getting later");
                         clearDrawable();
                         icon.getLater(new Consumer<Drawable>(){
                             public boolean consume(Drawable icon) {
                                 if (DBG) {
                                     Log.d(TAG, "IconConsumer.consume got id " + uniqueIconId +
                                             " want id " + mWantedId);
                                 }
                                 // ensure we have not been re-bound since the request was made.
                                 if (TextUtils.equals(uniqueIconId, mWantedId)) {
                                     handleNewDrawable(icon, uniqueIconId, source);
                                     return true;
                                 }
                                 return false;
                             }});
                     }
                 }
             } else {
                 mWantedId = null;
                 handleNewDrawable(null, null, source);
             }
         }

         private void handleNewDrawable(Drawable icon, String id, Source source) {
             if (icon == null) {
                 mWantedId = getFallbackIconId(source);
                 if (TextUtils.equals(mWantedId, mCurrentId)) {
                     return;
                 }
                 icon = getFallbackIcon(source);
             }
             setDrawable(icon, id);
         }

         private void setDrawable(Drawable icon, String id) {
             mCurrentId = id;
             setViewDrawable(mView, icon);
         }

         private void clearDrawable() {
             mCurrentId = null;
             mView.setImageDrawable(null);
         }

         protected String getFallbackIconId(Source source) {
             return null;
         }

         protected Drawable getFallbackIcon(Source source) {
             return null;
         }

     }

     public static class Factory extends SuggestionViewInflater {
         public Factory(Context context) {
             super(VIEW_ID, DefaultSuggestionView.class, R.layout.suggestion, context);
         }
     }

 }
	/*
	* Copyright (C) 2009 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 com.android.quicksearchbox.ui;

	import com.android.quicksearchbox.R;
	import com.android.quicksearchbox.Source;
	import com.android.quicksearchbox.Suggestion;
	import com.android.quicksearchbox.util.Consumer;
	import com.android.quicksearchbox.util.NowOrLater;

	import android.content.Context;
	import android.content.res.ColorStateList;
	import android.graphics.drawable.Drawable;
	import android.net.Uri;
	import android.text.Html;
	import android.text.Spannable;
	import android.text.SpannableString;
	import android.text.TextUtils;
	import android.text.style.TextAppearanceSpan;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.View;
	import android.widget.ImageView;
	import android.widget.TextView;

	/**
	* View for the items in the suggestions list. This includes promoted suggestions,
	* sources, and suggestions under each source.
	*/
	public class DefaultSuggestionView extends BaseSuggestionView {

	private static final boolean DBG = false;

	private static final String VIEW_ID = "default";

	private final String TAG = "QSB.DefaultSuggestionView";

	private AsyncIcon mAsyncIcon1;
	private AsyncIcon mAsyncIcon2;

	public DefaultSuggestionView(Context context, AttributeSet attrs, int defStyle) {
	super(context, attrs, defStyle);
	}

	public DefaultSuggestionView(Context context, AttributeSet attrs) {
	super(context, attrs);
	}

	public DefaultSuggestionView(Context context) {
	super(context);
	}

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	mText1 = (TextView) findViewById(R.id.text1);
	mText2 = (TextView) findViewById(R.id.text2);
	mAsyncIcon1 = new AsyncIcon(mIcon1) {
	// override default icon (when no other available) with default source icon
	@Override
	protected String getFallbackIconId(Source source) {
	return source.getSourceIconUri().toString();
	}
	@Override
	protected Drawable getFallbackIcon(Source source) {
	return source.getSourceIcon();
	}
	};
	mAsyncIcon2 = new AsyncIcon(mIcon2);
	}

	@Override
	public void bindAsSuggestion(Suggestion suggestion, String userQuery) {
	super.bindAsSuggestion(suggestion, userQuery);

	CharSequence text1 = formatText(suggestion.getSuggestionText1(), suggestion);
	CharSequence text2 = suggestion.getSuggestionText2Url();
	if (text2 != null) {
	text2 = formatUrl(text2);
	} else {
	text2 = formatText(suggestion.getSuggestionText2(), suggestion);
	}
	// If there is no text for the second line, allow the first line to be up to two lines
	if (TextUtils.isEmpty(text2)) {
	mText1.setSingleLine(false);
	mText1.setMaxLines(2);
	mText1.setEllipsize(TextUtils.TruncateAt.START);
	} else {
	mText1.setSingleLine(true);
	mText1.setMaxLines(1);
	mText1.setEllipsize(TextUtils.TruncateAt.MIDDLE);
	}
	setText1(text1);
	setText2(text2);
	mAsyncIcon1.set(suggestion.getSuggestionSource(), suggestion.getSuggestionIcon1());
	mAsyncIcon2.set(suggestion.getSuggestionSource(), suggestion.getSuggestionIcon2());

	if (DBG) {
	Log.d(TAG, "bindAsSuggestion(), text1=" + text1 + ",text2=" + text2 + ",q='" +
	userQuery + ",fromHistory=" + isFromHistory(suggestion));
	}
	}

	private CharSequence formatUrl(CharSequence url) {
	SpannableString text = new SpannableString(url);
	ColorStateList colors = getResources().getColorStateList(R.color.url_text);
	text.setSpan(new TextAppearanceSpan(null, 0, 0, colors, null),
	0, url.length(),
	Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
	return text;
	}

	private CharSequence formatText(String str, Suggestion suggestion) {
	boolean isHtml = "html".equals(suggestion.getSuggestionFormat());
	if (isHtml && looksLikeHtml(str)) {
	return Html.fromHtml(str);
	} else {
	return str;
	}
	}

	private boolean looksLikeHtml(String str) {
	if (TextUtils.isEmpty(str)) return false;
	for (int i = str.length() - 1; i >= 0; i--) {
	char c = str.charAt(i);
	if (c == '>' \|\| c == '&') return true;
	}
	return false;
	}

	/**
	* Sets the drawable in an image view, makes sure the view is only visible if there
	* is a drawable.
	*/
	private static void setViewDrawable(ImageView v, Drawable drawable) {
	// Set the icon even if the drawable is null, since we need to clear any
	// previous icon.
	v.setImageDrawable(drawable);

	if (drawable == null) {
	v.setVisibility(View.GONE);
	} else {
	v.setVisibility(View.VISIBLE);

	// This is a hack to get any animated drawables (like a 'working' spinner)
	// to animate. You have to setVisible true on an AnimationDrawable to get
	// it to start animating, but it must first have been false or else the
	// call to setVisible will be ineffective. We need to clear up the story
	// about animated drawables in the future, see http://b/1878430.
	drawable.setVisible(false, false);
	drawable.setVisible(true, false);
	}
	}

	private class AsyncIcon {
	private final ImageView mView;
	private String mCurrentId;
	private String mWantedId;

	public AsyncIcon(ImageView view) {
	mView = view;
	}

	public void set(final Source source, final String sourceIconId) {
	if (sourceIconId != null) {
	// The iconId can just be a package-relative resource ID, which may overlap with
	// other packages. Make sure it's globally unique.
	Uri iconUri = source.getIconUri(sourceIconId);
	final String uniqueIconId = iconUri == null ? null : iconUri.toString();
	mWantedId = uniqueIconId;
	if (!TextUtils.equals(mWantedId, mCurrentId)) {
	if (DBG) Log.d(TAG, "getting icon Id=" + uniqueIconId);
	NowOrLater<Drawable> icon = source.getIcon(sourceIconId);
	if (icon.haveNow()) {
	if (DBG) Log.d(TAG, "getIcon ready now");
	handleNewDrawable(icon.getNow(), uniqueIconId, source);
	} else {
	// make sure old icon is not visible while new one is loaded
	if (DBG) Log.d(TAG , "getIcon getting later");
	clearDrawable();
	icon.getLater(new Consumer<Drawable>(){
	public boolean consume(Drawable icon) {
	if (DBG) {
	Log.d(TAG, "IconConsumer.consume got id " + uniqueIconId +
	" want id " + mWantedId);
	}
	// ensure we have not been re-bound since the request was made.
	if (TextUtils.equals(uniqueIconId, mWantedId)) {
	handleNewDrawable(icon, uniqueIconId, source);
	return true;
	}
	return false;
	}});
	}
	}
	} else {
	mWantedId = null;
	handleNewDrawable(null, null, source);
	}
	}

	private void handleNewDrawable(Drawable icon, String id, Source source) {
	if (icon == null) {
	mWantedId = getFallbackIconId(source);
	if (TextUtils.equals(mWantedId, mCurrentId)) {
	return;
	}
	icon = getFallbackIcon(source);
	}
	setDrawable(icon, id);
	}

	private void setDrawable(Drawable icon, String id) {
	mCurrentId = id;
	setViewDrawable(mView, icon);
	}

	private void clearDrawable() {
	mCurrentId = null;
	mView.setImageDrawable(null);
	}

	protected String getFallbackIconId(Source source) {
	return null;
	}

	protected Drawable getFallbackIcon(Source source) {
	return null;
	}

	}

	public static class Factory extends SuggestionViewInflater {
	public Factory(Context context) {
	super(VIEW_ID, DefaultSuggestionView.class, R.layout.suggestion, context);
	}
	}

	}