michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.preferences;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.graphics.drawable.Drawable;
michael@0: import android.preference.Preference;
michael@0: import android.text.Spanned;
michael@0: import android.text.SpannableStringBuilder;
michael@0: import android.text.style.ImageSpan;
michael@0: import android.util.AttributeSet;
michael@0: import android.view.View;
michael@0: import android.view.ViewGroup;
michael@0: import android.widget.TextView;
michael@0: 
michael@0: class ModifiableHintPreference extends Preference {
michael@0:     private static final String LOGTAG = "ModifiableHintPref";
michael@0:     private final Context mContext;
michael@0: 
michael@0:     private final String MATCH_STRING = "%I";
michael@0:     private final int RESID_TEXT_VIEW = R.id.label_search_hint;
michael@0:     private final int RESID_DRAWABLE = R.drawable.ab_add_search_engine;
michael@0:     private final double SCALE_FACTOR = 0.5;
michael@0: 
michael@0:     public ModifiableHintPreference(Context context, AttributeSet attrs) {
michael@0:         super(context, attrs);
michael@0:         mContext = context;
michael@0:     }
michael@0: 
michael@0:     public ModifiableHintPreference(Context context, AttributeSet attrs, int defStyle) {
michael@0:         super(context, attrs, defStyle);
michael@0:         mContext = context;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected View onCreateView(ViewGroup parent) {
michael@0:         View thisView = super.onCreateView(parent);
michael@0:         configurePreferenceView(thisView);
michael@0:         return thisView;
michael@0:     }
michael@0: 
michael@0:     private void configurePreferenceView(View view) {
michael@0:         TextView textView = (TextView) view.findViewById(RESID_TEXT_VIEW);
michael@0:         String searchHint = textView.getText().toString();
michael@0: 
michael@0:         // Use an ImageSpan to include the "add search" icon in the Tip.
michael@0:         int imageSpanIndex = searchHint.indexOf(MATCH_STRING);
michael@0:         if (imageSpanIndex != -1) {
michael@0:             // Scale the resource.
michael@0:             Drawable drawable = mContext.getResources().getDrawable(RESID_DRAWABLE);
michael@0:             drawable.setBounds(0, 0, (int) (drawable.getIntrinsicWidth() * SCALE_FACTOR),
michael@0:                                (int) (drawable.getIntrinsicHeight() * SCALE_FACTOR));
michael@0: 
michael@0:             ImageSpan searchIcon = new ImageSpan(drawable);
michael@0:             final SpannableStringBuilder hintBuilder = new SpannableStringBuilder(searchHint);
michael@0: 
michael@0:             // Insert the image.
michael@0:             hintBuilder.setSpan(searchIcon, imageSpanIndex, imageSpanIndex + MATCH_STRING.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
michael@0:             textView.setText(hintBuilder, TextView.BufferType.SPANNABLE);
michael@0:         }
michael@0:     }
michael@0: }