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Commit 8443c5e8 authored by Austin Kolander's avatar Austin Kolander
Browse files

Added support for custom text selection. 

Created a class to handle selection of all text in a textview
or select part of the textview.

Bug: 64082214
Test: InspectorTextSelectorTest
Change-Id: Id19333de77781711756343fa27a4f51b6d65f254
parent 7e4b4c5f

src/com/android/documentsui/inspector/HeaderTextSelector.java

0 → 100644
+89 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 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.documentsui.inspector;



import static com.android.internal.util.Preconditions.checkArgument;



import android.text.Spannable;

import android.view.ActionMode;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.TextView;



/**

 * Selects all or part of a textview.

 */

 public final class HeaderTextSelector implements ActionMode.Callback {



    private final TextView mText;

    private final Selector mSelector;



    public HeaderTextSelector(TextView text, Selector selector) {

        checkArgument(text != null);

        checkArgument(selector != null);

        mText = text;

        mSelector = selector;

    }



    // An action mode is created when the user selects text. This method is called where

    // we force it to select only the filename in the header. Meaning the name of the file would

    // be selected but the extension would not.

    @Override

    public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {

        CharSequence value = mText.getText();

        if (value instanceof Spannable) {

            mSelector.select((Spannable) value, 0, getLengthOfFilename(value));

        }

        return true;

    }



    @Override

    public boolean onPrepareActionMode(ActionMode actionMode, Menu menu) {

        return true;

    }



    @Override

    public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {

        return false;

    }



    @Override

    public void onDestroyActionMode(ActionMode actionMode) {}



    /**

     * Gets the length of the inspector header for selection.

     *

     * Example:

     * filename.txt returns the end index needed to select "filename".

     *

     * @return the index of the last character in the filename

     */

    private static int getLengthOfFilename(CharSequence text) {

        String title = text.toString();

        if (title != null) {

            int index = title.indexOf('.');

            if (index > 0) {

                return index;

            }

        }



        return text.length();

    }



    public interface Selector {

        void select(Spannable text, int start, int stop);

    }

}

src/com/android/documentsui/inspector/HeaderView.java

+8 −0
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ import android.content.Context; 
import android.graphics.Bitmap;

import android.graphics.Point;

import android.graphics.drawable.Drawable;

import android.text.Selection;

import android.text.Spannable;

import android.util.AttributeSet;

import android.view.LayoutInflater;

import android.view.View;
@@ -77,6 +79,12 @@ public final class HeaderView extends RelativeLayout implements HeaderDisplay { 
    public void accept(DocumentInfo info, String displayName) {

        loadHeaderImage(info);

        mTitle.setText(displayName);

        mTitle.setCustomSelectionActionModeCallback(

                new HeaderTextSelector(mTitle, this::selectText));

    }



    private void selectText(Spannable text, int start, int stop) {

        Selection.setSelection(text, start, stop);

    }



    private void loadHeaderImage(DocumentInfo doc) {

tests/unit/com/android/documentsui/inspector/HeaderTextSelectorTest.java

0 → 100644
+136 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 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.documentsui.inspector;



import static junit.framework.Assert.assertEquals;

import static junit.framework.Assert.assertTrue;



import android.content.Context;

import android.support.test.InstrumentationRegistry;

import android.support.test.runner.AndroidJUnit4;



import android.test.suitebuilder.annotation.SmallTest;

import android.text.Spannable;

import android.text.SpannableString;

import android.widget.TextView;

import com.android.documentsui.inspector.HeaderTextSelector.Selector;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;



@RunWith(AndroidJUnit4.class)

@SmallTest

public class HeaderTextSelectorTest {



    private Context mContext;

    private TestTextView mTestTextView;

    private TestSelector mTestSelector;

    private HeaderTextSelector mSelector;



    @Before

    public void setUp() throws Exception {

        mContext = InstrumentationRegistry.getTargetContext();

        mTestTextView = new TestTextView(mContext);

        mTestSelector = new TestSelector();

        mSelector = new HeaderTextSelector(mTestTextView, mTestSelector);

    }



    @Test

    public void testSimpleFileName() throws Exception {

        CharSequence fileName = "filename";

        String extension = ".txt";

        String testSequence = fileName + extension;



        mTestTextView.setText(testSequence);

        mSelector.onCreateActionMode(null, null);

        mTestSelector.assertCalled();



        CharSequence selectedSequence =

                testSequence.subSequence(mTestSelector.mStart, mTestSelector.mStop);

        assertEquals(selectedSequence, fileName);

    }





    @Test

    public void testLotsOfPeriodsInFileName() throws Exception {

        CharSequence fileName = "filename";

        String extension = ".jpg.zip.pdf.txt";

        String testSequence = fileName + extension;



        mTestTextView.setText(testSequence);

        mSelector.onCreateActionMode(null, null);

        mTestSelector.assertCalled();



        CharSequence selectedSequence =

            testSequence.subSequence(mTestSelector.mStart, mTestSelector.mStop);

        assertEquals(selectedSequence, fileName);

    }



    @Test

    public void testNoPeriodsInFileName() throws Exception {

        String testSequence = "filename";



        mTestTextView.setText(testSequence);

        mSelector.onCreateActionMode(null, null);

        mTestSelector.assertCalled();



        CharSequence selectedSequence =

            testSequence.subSequence(mTestSelector.mStart, mTestSelector.mStop);

        assertEquals(selectedSequence, testSequence);

    }



    private static class TestTextView extends TextView {



        public TestTextView(Context context) {

            super(context);

        }



        private String textViewString;



        public void setText(String text) {

            textViewString = text;

        }



        @Override

        public CharSequence getText() {

            return new SpannableString(textViewString);

        }

    }



    private static class TestSelector implements Selector {



        private boolean mCalled;

        private int mStart;

        private int mStop;



        public TestSelector() {

            mCalled = false;

            mStart = -1;

            mStop = -1;

        }



        @Override

        public void select(Spannable text, int start, int stop) {

            mCalled = true;

            mStart = start;

            mStop = stop;

        }



        public void assertCalled() {

            assertTrue(mCalled);

        }

    }

}
 
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