/*
 * Copyright (C) 2008 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.view.inputmethod;

import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.os.SystemClock;
import android.text.NoCopySpan;
import android.text.Spannable;
import android.text.Spanned;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;

class Editable {}

class ComposingText {
}

/**
 * Base class for implementors of the InputConnection interface, taking care
 * of most of the common behavior for providing a connection to an Editable.
 * Implementors of this class will want to be sure to implement
 * {@link #getEditable} to provide access to their own editable object.
 */
public class BaseInputConnection implements InputConnection {

	BaseInputConnection(InputMethodManager mgr, boolean fullEditor) {
	}

	public BaseInputConnection(View targetView, boolean fullEditor) {
	}

	public static final void removeComposingSpans(Spannable text) {
	}
	public static void setComposingSpans(Spannable text) {
		setComposingSpans(text, 0, text.length());
	}
	/**
	 * @hide
	 */
	public static void setComposingSpans(Spannable text, int start, int end) {
	}

	public static int getComposingSpanStart(Spannable text) {
		return 0;
	}

	public static int getComposingSpanEnd(Spannable text) {
		return 0;
	}

	/**
	 * Return the target of edit operations.  The default implementation
	 * returns its own fake editable that is just used for composing text;
	 * subclasses that are real text editors should override this and
	 * supply their own.
	 */
	public Editable getEditable() {
		return new Editable();
	}

	/**
	 * Default implementation does nothing.
	 */
	public boolean beginBatchEdit() {
		return false;
	}
	/**
	 * Default implementation does nothing.
	 */
	public boolean endBatchEdit() {
		return false;
	}
	/**
	 * Called when this InputConnection is no longer used by the InputMethodManager.
	 *
	 * @hide
	 */
	protected void reportFinish() {
		// Intentionaly empty
	}
	/**
	 * Default implementation uses
	 * {@link MetaKeyKeyListener#clearMetaKeyState(long, int)
	 * MetaKeyKeyListener.clearMetaKeyState(long, int)} to clear the state.
	 */
	public boolean clearMetaKeyStates(int states) {
		return true;
	}
	/**
	 * Default implementation does nothing and returns false.
	 */
	public boolean commitCompletion(CompletionInfo text) {
		return false;
	}
	/**
	 * Default implementation does nothing and returns false.
	 */
	public boolean commitCorrection(CorrectionInfo correctionInfo) {
		return false;
	}
	/**
	 * Default implementation replaces any existing composing text with
	 * the given text.  In addition, only if dummy mode, a key event is
	 * sent for the new text and the current editable buffer cleared.
	 */
	public boolean commitText(CharSequence text, int newCursorPosition) {
		return true;
	}
	/**
	 * The default implementation performs the deletion around the current
	 * selection position of the editable text.
	 * @param beforeLength
	 * @param afterLength
	 */
	public boolean deleteSurroundingText(int beforeLength, int afterLength) {
		return true;
	}
	/**
	 * The default implementation removes the composing state from the
	 * current editable text.  In addition, only if dummy mode, a key event is
	 * sent for the new text and the current editable buffer cleared.
	 */
	public boolean finishComposingText() {
		return true;
	}
	/**
	 * The default implementation uses TextUtils.getCapsMode to get the
	 * cursor caps mode for the current selection position in the editable
	 * text, unless in dummy mode in which case 0 is always returned.
	 */
	public int getCursorCapsMode(int reqModes) {
		return 0;
	}
	/**
	 * The default implementation always returns null.
	 */
	public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
		return null;
	}
	/**
	 * The default implementation returns the given amount of text from the
	 * current cursor position in the buffer.
	 */
	public CharSequence getTextBeforeCursor(int length, int flags) {
		return "";
	}
	/**
	 * The default implementation returns the text currently selected, or null if none is
	 * selected.
	 */
	public CharSequence getSelectedText(int flags) {
		return "";
	}
	/**
	 * The default implementation returns the given amount of text from the
	 * current cursor position in the buffer.
	 */
	public CharSequence getTextAfterCursor(int length, int flags) {
		return "";
	}
	/**
	 * The default implementation turns this into the enter key.
	 */
	public boolean performEditorAction(int actionCode) {
		return true;
	}
	/**
	 * The default implementation does nothing.
	 */
	public boolean performContextMenuAction(int id) {
		return false;
	}
	/**
	 * The default implementation does nothing.
	 */
	public boolean performPrivateCommand(String action, Bundle data) {
		return false;
	}
	/**
	 * The default implementation places the given text into the editable,
	 * replacing any existing composing text.  The new text is marked as
	 * in a composing state with the composing style.
	 */
	public boolean setComposingText(CharSequence text, int newCursorPosition) {
		return true;
	}
	public boolean setComposingRegion(int start, int end) {
		return true;
	}
	/**
	 * The default implementation changes the selection position in the
	 * current editable text.
	 */
	public boolean setSelection(int start, int end) {
		return true;
	}
	/**
	 * Provides standard implementation for sending a key event to the window
	 * attached to the input connection's view.
	 */
	public boolean sendKeyEvent(KeyEvent event) {
		return false;
	}

	/**
	 * Updates InputMethodManager with the current fullscreen mode.
	 */
	public boolean reportFullscreenMode(boolean enabled) {
		return true;
	}
}