/* * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * 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 net.micode.notes.ui; import android.content.Context; import android.graphics.Rect; import android.text.Layout; import android.text.Selection; import android.text.Spanned; import android.text.TextUtils; import android.text.style.URLSpan; import android.util.AttributeSet; import android.util.Log; import android.view.ContextMenu; import android.view.KeyEvent; import android.view.MenuItem; import android.view.MenuItem.OnMenuItemClickListener; import android.view.MotionEvent; import android.widget.EditText; import net.micode.notes.R; import java.util.HashMap; import java.util.Map; public class NoteEditText extends EditText { private static final String TAG = "NoteEditText"; private int mIndex; private int mSelectionStartBeforeDelete; private static final String SCHEME_TEL = "tel:" ; private static final String SCHEME_HTTP = "http:" ; private static final String SCHEME_EMAIL = "mailto:" ; // 定义一个映射，将不同的URL scheme与资源ID关联起来 private static final Map sSchemaActionResMap = new HashMap(); static { sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel); sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web); sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email); } /** * 用于在NoteEditActivity中删除或添加EditText时的回调接口 */ public interface OnTextViewChangeListener { // 当文本为空且按下删除键（KEYCODE_DEL）时，删除当前EditText void onEditTextDelete(int index, String text); // 当按下回车键（KEYCODE_ENTER）时，在当前EditText之后添加EditText void onEditTextEnter(int index, String text); // 当文本发生更改时，隐藏或显示项目选项 void onTextChange(int index, boolean hasText); } private OnTextViewChangeListener mOnTextViewChangeListener; public NoteEditText(Context context) { super(context, null); mIndex = 0; } // 设置EditText的索引 public void setIndex(int index) { mIndex = index; } // 设置文本变化监听器 public void setOnTextViewChangeListener(OnTextViewChangeListener listener) { mOnTextViewChangeListener = listener; } public NoteEditText(Context context, AttributeSet attrs) { super(context, attrs, android.R.attr.editTextStyle); } public NoteEditText(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // TODO 自动生成的构造函数存根 } @Override // 处理touch事件，用于选择文本 public boolean onTouchEvent(MotionEvent event) { // 在用户按下时，选择文本 switch (event.getAction()) { case MotionEvent.ACTION_DOWN: int x = (int) event.getX(); int y = (int) event.getY(); x -= getTotalPaddingLeft(); y -= getTotalPaddingTop(); x += getScrollX(); y += getScrollY(); Layout layout = getLayout(); int line = layout.getLineForVertical(y); int off = layout.getOffsetForHorizontal(line, x); Selection.setSelection(getText(), off); break; } return super.onTouchEvent(event); } @Override // 处理按键按下事件 public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_ENTER: // 当按下回车键（KEYCODE_ENTER）时，如果有文本变化监听器，返回false if (mOnTextViewChangeListener != null) { return false; } break; case KeyEvent.KEYCODE_DEL: mSelectionStartBeforeDelete = getSelectionStart(); break; default: break; } return super.onKeyDown(keyCode, event); } @Override // 处理按键释放事件 public boolean onKeyUp(int keyCode, KeyEvent event) { switch(keyCode) { case KeyEvent.KEYCODE_DEL: // 处理按键释放事件，回车和删除键 if (mOnTextViewChangeListener != null) { if (0 == mSelectionStartBeforeDelete && mIndex != 0) { mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString()); return true; } } else { Log.d(TAG, "OnTextViewChangeListener was not seted"); } break; case KeyEvent.KEYCODE_ENTER: if (mOnTextViewChangeListener != null) { int selectionStart = getSelectionStart(); String text = getText().subSequence(selectionStart, length()).toString(); setText(getText().subSequence(0, selectionStart)); mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text); } else { Log.d(TAG, "OnTextViewChangeListener was not seted"); } break; default: break; } return super.onKeyUp(keyCode, event); } @Override // 当焦点发生变化时的回调 protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) { // 当焦点发生变化时，通知文本变化监听器 if (mOnTextViewChangeListener != null) { if (!focused && TextUtils.isEmpty(getText())) { mOnTextViewChangeListener.onTextChange(mIndex, false); } else { mOnTextViewChangeListener.onTextChange(mIndex, true); } } super.onFocusChanged(focused, direction, previouslyFocusedRect); } @Override protected void onCreateContextMenu(ContextMenu menu) { // 创建上下文菜单 // 在文本上下文菜单中添加选项 if (getText() instanceof Spanned) { int selStart = getSelectionStart(); int selEnd = getSelectionEnd(); int min = Math.min(selStart, selEnd); int max = Math.max(selStart, selEnd); final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class); if (urls.length == 1) { int defaultResId = 0; for(String schema: sSchemaActionResMap.keySet()) { if(urls[0].getURL().indexOf(schema) >= 0) { defaultResId = sSchemaActionResMap.get(schema); break; } } if (defaultResId == 0) { defaultResId = R.string.note_link_other; } menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener( new OnMenuItemClickListener() { public boolean onMenuItemClick(MenuItem item) { // goto a new intent urls[0].onClick(NoteEditText.this); return true; } }); } } super.onCreateContextMenu(menu); } }