|
|
/*
|
|
|
* 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;
|
|
|
|
|
|
//NoteEditText类拓展自EditText，添加了一些特定用于笔记应用的特性
|
|
|
public class NoteEditText extends EditText {
|
|
|
//日志标签，用于调试
|
|
|
private static final String TAG = "NoteEditText";
|
|
|
//变量来存储当前编辑框的索引
|
|
|
private int mIndex;
|
|
|
//用于跟踪删除操作前光标位置
|
|
|
private int mSelectionStartBeforeDelete;
|
|
|
//协议模式，用于识别文本中的特殊内容
|
|
|
private static final String SCHEME_TEL = "tel:" ;
|
|
|
private static final String SCHEME_HTTP = "http:" ;
|
|
|
private static final String SCHEME_EMAIL = "mailto:" ;
|
|
|
//协议模式和资源ID映射，用于创建上下文菜单项
|
|
|
private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
|
|
|
static {
|
|
|
//将电话、网页、邮箱对应的文本资源ID填充到映射
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Call by the {@link NoteEditActivity} to delete or add edit text
|
|
|
*/
|
|
|
//接口，用于监听文本视图的改变事件，例如删除和输入
|
|
|
public interface OnTextViewChangeListener {
|
|
|
/**
|
|
|
* Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
|
|
|
* and the text is null
|
|
|
*/
|
|
|
void onEditTextDelete(int index, String text);
|
|
|
|
|
|
/**
|
|
|
* Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
|
|
|
* happen
|
|
|
*/
|
|
|
void onEditTextEnter(int index, String text);
|
|
|
|
|
|
/**
|
|
|
* Hide or show item option when text change
|
|
|
*/
|
|
|
void onTextChange(int index, boolean hasText);
|
|
|
}
|
|
|
//用于通知文本视图更改的监听器
|
|
|
private OnTextViewChangeListener mOnTextViewChangeListener;
|
|
|
|
|
|
//构造函数初始化编辑框，设置索引值为0
|
|
|
public NoteEditText(Context context) {
|
|
|
super(context, null);
|
|
|
mIndex = 0;
|
|
|
}
|
|
|
|
|
|
//设置编辑框的索引值
|
|
|
public void setIndex(int index) {
|
|
|
mIndex = index;
|
|
|
}
|
|
|
|
|
|
//设置监听器
|
|
|
public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
|
|
|
mOnTextViewChangeListener = listener;
|
|
|
}
|
|
|
|
|
|
//另外两个构造函数允许在创建对象使用布局属性和样式
|
|
|
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 Auto-generated constructor stub 未实现的
|
|
|
}
|
|
|
|
|
|
//触摸事件的处理，主要是为了处理文本选择
|
|
|
@Override
|
|
|
public boolean onTouchEvent(MotionEvent event) {
|
|
|
//处理用户的触摸事件，设置了文本的选择位置
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
//键盘按键事件的处理，主要是监听删除键和回车键
|
|
|
@Override
|
|
|
public boolean onKeyDown(int keyCode, KeyEvent event) {
|
|
|
switch (keyCode) {
|
|
|
case KeyEvent.KEYCODE_ENTER:
|
|
|
if (mOnTextViewChangeListener != null) {
|
|
|
return false;
|
|
|
}
|
|
|
break;
|
|
|
case KeyEvent.KEYCODE_DEL:
|
|
|
mSelectionStartBeforeDelete = getSelectionStart();
|
|
|
break;
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
return super.onKeyDown(keyCode, event);
|
|
|
}
|
|
|
|
|
|
//松开按键事件的处理
|
|
|
@Override
|
|
|
public boolean onKeyUp(int keyCode, KeyEvent event) {
|
|
|
switch(keyCode) {
|
|
|
case KeyEvent.KEYCODE_DEL:
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
//当编辑框焦点改变时，比如失去或者获取焦点时的处理
|
|
|
@Override
|
|
|
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
|
|
|
if (mOnTextViewChangeListener != null) {
|
|
|
if (!focused && TextUtils.isEmpty(getText())) {
|
|
|
mOnTextViewChangeListener.onTextChange(mIndex, false);
|
|
|
}
|
|
|
else {
|
|
|
mOnTextViewChangeListener.onTextChange(mIndex, true);
|
|
|
}
|
|
|
}
|
|
|
super.onFocusChanged(focused, direction, previouslyFocusedRect);
|
|
|
}
|
|
|
|
|
|
//上下文菜单创建时的处理，可以在编辑框中添加特定行为的菜单项，例如打电话、打开网页或发送邮箱
|
|
|
@Override
|
|
|
protected void onCreateContextMenu(ContextMenu menu) {
|
|
|
//检查文本内容是否为Spanned类型
|
|
|
if (getText() instanceof Spanned) {
|
|
|
int selStart = getSelectionStart();//获取选择文本起始位置
|
|
|
int selEnd = getSelectionEnd();// 结束位置
|
|
|
|
|
|
int min = Math.min(selStart, selEnd);
|
|
|
int max = Math.max(selStart, selEnd);
|
|
|
|
|
|
//从选择文本中获取URLSpan对象数组
|
|
|
final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
|
|
|
//如果只有一个URLSpan存在
|
|
|
if (urls.length == 1) {
|
|
|
int defaultResId = 0;
|
|
|
//遍历所有已定义的模式(schema)
|
|
|
for(String schema: sSchemaActionResMap.keySet()) {
|
|
|
//如果URLSpan的URL中包含该模式
|
|
|
if(urls[0].getURL().indexOf(schema) >= 0) {
|
|
|
//获取该模式对应的资源ID
|
|
|
defaultResId = sSchemaActionResMap.get(schema);
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
//如果没有找到匹配的模式对应的资源ID，则使用R.string.note_link_other作为默认资源ID
|
|
|
if (defaultResId == 0) {
|
|
|
defaultResId = R.string.note_link_other;
|
|
|
}
|
|
|
//像上下文菜单中添加菜单项，并设置点击事件
|
|
|
menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
|
|
|
new OnMenuItemClickListener() {
|
|
|
public boolean onMenuItemClick(MenuItem item) {
|
|
|
// goto a new intent 执行URLSpan中定义的点击操作
|
|
|
urls[0].onClick(NoteEditText.this);
|
|
|
return true;
|
|
|
}
|
|
|
});
|
|
|
}
|
|
|
}
|
|
|
super.onCreateContextMenu(menu); //调用父类的方法创建上下文菜单
|
|
|
}
|
|
|
}
|
