Merge "TextViewActions for Espresso-testing TextView."

package android.widget;

import static android.widget.espresso.TextViewActions.clickOnTextAtIndex;

import static android.support.test.espresso.Espresso.onView;

import static android.support.test.espresso.action.ViewActions.click;

import static android.support.test.espresso.action.ViewActions.pressKey;

import static android.support.test.espresso.action.ViewActions.typeTextIntoFocusedView;

import static android.support.test.espresso.assertion.ViewAssertions.matches;

import static android.support.test.espresso.matcher.ViewMatchers.withId;

import android.test.ActivityInstrumentationTestCase2;

import android.test.suitebuilder.annotation.SmallTest;

import android.view.KeyEvent;

/**

 * Tests the TextView widget from an Activity

        onView(withId(R.id.textview)).check(matches(withText(helloWorld)));

    }

    @SmallTest

    public void testPositionCursorAtTextAtIndex() throws Exception {

        getActivity();

        final String helloWorld = "Hello world!";

        onView(withId(R.id.textview)).perform(typeTextIntoFocusedView(helloWorld));

        onView(withId(R.id.textview)).perform(clickOnTextAtIndex(helloWorld.indexOf("world")));

        // Delete text at specified index and see if we got the right one.

        onView(withId(R.id.textview)).perform(pressKey(KeyEvent.KEYCODE_FORWARD_DEL));

        onView(withId(R.id.textview)).check(matches(withText("Hello orld!")));

    }

}

/*

 * Copyright (C) 2015 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.widget.espresso;

import static android.support.test.espresso.action.ViewActions.actionWithAssertions;

import android.content.res.Resources;

import android.support.test.espresso.PerformException;

import android.support.test.espresso.ViewAction;

import android.support.test.espresso.action.CoordinatesProvider;

import android.support.test.espresso.action.GeneralClickAction;

import android.support.test.espresso.action.Press;

import android.support.test.espresso.action.Tap;

import android.support.test.espresso.util.HumanReadables;

import android.text.Layout;

import android.util.DisplayMetrics;

import android.util.TypedValue;

import android.view.View;

import android.widget.TextView;

/**

 * A collection of actions on a {@link android.widget.TextView}.

 */

public final class TextViewActions {

    private TextViewActions() {}

    /**

     * Returns an action that clicks on text at an index on the text view.<br>

     * <br>

     * View constraints:

     * <ul>

     * <li>must be a text view displayed on screen

     * <ul>

     */

    public static ViewAction clickOnTextAtIndex(int index) {

        return actionWithAssertions(

                new GeneralClickAction(Tap.SINGLE, new TextCoordinates(index), Press.FINGER));

    }

    /**

     * A provider of the x, y coordinates of the text at the specified index in a text view.

     */

    private static final class TextCoordinates implements CoordinatesProvider {

        private final int mIndex;

        private final String mActionDescription;

        public TextCoordinates(int index) {

            mIndex = index;

            mActionDescription = "Could not locate text at index: " + mIndex;

        }

        @Override

        public float[] calculateCoordinates(View view) {

            try {

                return locateTextAtIndex((TextView) view, mIndex);

            } catch (ClassCastException e) {

                throw new PerformException.Builder()

                        .withActionDescription(mActionDescription)

                        .withViewDescription(HumanReadables.describe(view))

                        .withCause(e)

                        .build();

            } catch (StringIndexOutOfBoundsException e) {

                throw new PerformException.Builder()

                        .withActionDescription(mActionDescription)

                        .withViewDescription(HumanReadables.describe(view))

                        .withCause(e)

                        .build();

            }

        }

        /**

         * @throws StringIndexOutOfBoundsException

         */

        private float[] locateTextAtIndex(TextView textView, int index) {

            if (index < 0 || index > textView.getText().length()) {

                throw new StringIndexOutOfBoundsException(index);

            }

            final int[] xy = new int[2];

            textView.getLocationOnScreen(xy);

            final Layout layout = textView.getLayout();

            final int line = layout.getLineForOffset(index);

            final float x = textView.getTotalPaddingLeft() - textView.getScrollX()

                    + layout.getPrimaryHorizontal(index);

            final float y = textView.getTotalPaddingTop() - textView.getScrollY()

                    + layout.getLineTop(line);

            return new float[]{x + xy[0], y + xy[1]};

        }

    }

}