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src/net/micode/notes/ui/NoteEditText.java
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@ -14,204 +14,273 @@
* limitations under the License. * limitations under the License.
*/ */
package net.micode.notes.ui; package net.micode.notes.ui;
import android.content.Context; import android.content.Context;
import android.graphics.Rect; import android.graphics.Rect;
import android.text.Layout; import android.text.Layout;
import android.text.Selection; import android.text.Selection;
import android.text.Spanned; import android.text.Spanned;
import android.text.TextUtils; import android.text.TextUtils;
import android.text.style.URLSpan; import android.text.style.URLSpan;
import android.util.AttributeSet; import android.util.AttributeSet;
import android.util.Log; import android.util.Log;
import android.view.ContextMenu; import android.view.ContextMenu;
import android.view.KeyEvent; import android.view.KeyEvent;
import android.view.MenuItem; import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener; import android.view.MenuItem.OnMenuItemClickListener;
import android.view.MotionEvent; import android.view.MotionEvent;
import android.widget.EditText; import android.widget.EditText;
import net.micode.notes.R; import net.micode.notes.R;
import java.util.HashMap; import java.util.HashMap;
import java.util.Map; import java.util.Map;
public class NoteEditText extends EditText { /**
private static final String TAG = "NoteEditText"; * 自定义EditText组件，用于小米便签应用中的文本编辑功能
private int mIndex; * 支持链接识别、回车键和删除键的特殊处理以及上下文菜单定制
private int mSelectionStartBeforeDelete; */
public class NoteEditText extends EditText {
private static final String SCHEME_TEL = "tel:" ; private static final String TAG = "NoteEditText";
private static final String SCHEME_HTTP = "http:" ; private int mIndex; // 当前编辑框在便签中的索引位置
private static final String SCHEME_EMAIL = "mailto:" ; private int mSelectionStartBeforeDelete; // 删除操作前的光标位置
private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>(); // 支持的链接协议
static { private static final String SCHEME_TEL = "tel:" ;
sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel); private static final String SCHEME_HTTP = "http:" ;
sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web); private static final String SCHEME_EMAIL = "mailto:" ;
sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
} // 协议与菜单项资源ID的映射
private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
/** static {
* Call by the {@link NoteEditActivity} to delete or add edit text sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
*/ sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
public interface OnTextViewChangeListener { sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
/** }
* Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
* and the text is null /**
*/ * 文本视图变化监听器接口
void onEditTextDelete(int index, String text); * 用于与NoteEditActivity通信，处理编辑框的添加、删除和文本变化事件
*/
/** public interface OnTextViewChangeListener {
* Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER} /**
* happen * 当按下删除键且文本为空时，删除当前编辑框
*/ * @param index 当前编辑框的索引
void onEditTextEnter(int index, String text); * @param text 当前编辑框的文本内容
*/
/** void onEditTextDelete(int index, String text);
* Hide or show item option when text change
*/ /**
void onTextChange(int index, boolean hasText); * 当按下回车键时，在当前编辑框后添加新的编辑框
} * @param index 新编辑框的索引位置
* @param text 当前编辑框中回车键后的剩余文本
private OnTextViewChangeListener mOnTextViewChangeListener; */
void onEditTextEnter(int index, String text);
public NoteEditText(Context context) {
super(context, null); /**
mIndex = 0; * 当文本内容变化时，隐藏或显示菜单项
} * @param index 当前编辑框的索引
* @param hasText 是否有文本内容
public void setIndex(int index) { */
mIndex = index; void onTextChange(int index, boolean hasText);
} }
public void setOnTextViewChangeListener(OnTextViewChangeListener listener) { private OnTextViewChangeListener mOnTextViewChangeListener; // 文本变化监听器
mOnTextViewChangeListener = listener;
} /**
* 构造函数，用于在代码中创建NoteEditText实例
public NoteEditText(Context context, AttributeSet attrs) { * @param context 应用上下文
super(context, attrs, android.R.attr.editTextStyle); */
} public NoteEditText(Context context) {
super(context, null);
public NoteEditText(Context context, AttributeSet attrs, int defStyle) { mIndex = 0;
super(context, attrs, defStyle); }
// TODO Auto-generated constructor stub
} /**
* 设置编辑框的索引位置
@Override * @param index 索引值
public boolean onTouchEvent(MotionEvent event) { */
switch (event.getAction()) { public void setIndex(int index) {
case MotionEvent.ACTION_DOWN: mIndex = index;
}
int x = (int) event.getX();
int y = (int) event.getY(); /**
x -= getTotalPaddingLeft(); * 设置文本变化监听器
y -= getTotalPaddingTop(); * @param listener 实现了OnTextViewChangeListener接口的监听器
x += getScrollX(); */
y += getScrollY(); public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
mOnTextViewChangeListener = listener;
Layout layout = getLayout(); }
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x); /**
Selection.setSelection(getText(), off); * 构造函数，用于在XML布局文件中创建NoteEditText实例
break; * @param context 应用上下文
} * @param attrs 属性集合
*/
return super.onTouchEvent(event); public NoteEditText(Context context, AttributeSet attrs) {
} super(context, attrs, android.R.attr.editTextStyle);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) { /**
switch (keyCode) { * 构造函数，使用指定的样式资源
case KeyEvent.KEYCODE_ENTER: * @param context 应用上下文
if (mOnTextViewChangeListener != null) { * @param attrs 属性集合
return false; * @param defStyle 样式资源ID
} */
break; public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
case KeyEvent.KEYCODE_DEL: super(context, attrs, defStyle);
mSelectionStartBeforeDelete = getSelectionStart(); // TODO Auto-generated constructor stub
break; }
default:
break; /**
} * 处理触摸事件，确保点击位置能正确定位到文本
return super.onKeyDown(keyCode, event); * @param event 触摸事件
} * @return 是否处理了该事件
*/
@Override @Override
public boolean onKeyUp(int keyCode, KeyEvent event) { public boolean onTouchEvent(MotionEvent event) {
switch(keyCode) { switch (event.getAction()) {
case KeyEvent.KEYCODE_DEL: case MotionEvent.ACTION_DOWN:
if (mOnTextViewChangeListener != null) { // 计算触摸点在文本中的位置并设置光标
if (0 == mSelectionStartBeforeDelete && mIndex != 0) { int x = (int) event.getX();
mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString()); int y = (int) event.getY();
return true; x -= getTotalPaddingLeft();
} y -= getTotalPaddingTop();
} else { x += getScrollX();
Log.d(TAG, "OnTextViewChangeListener was not seted"); y += getScrollY();
}
break; Layout layout = getLayout();
case KeyEvent.KEYCODE_ENTER: int line = layout.getLineForVertical(y);
if (mOnTextViewChangeListener != null) { int off = layout.getOffsetForHorizontal(line, x);
int selectionStart = getSelectionStart(); Selection.setSelection(getText(), off);
String text = getText().subSequence(selectionStart, length()).toString(); break;
setText(getText().subSequence(0, selectionStart)); }
mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
} else { return super.onTouchEvent(event);
Log.d(TAG, "OnTextViewChangeListener was not seted"); }
}
break; /**
default: * 处理按键按下事件
break; * @param keyCode 按键码
} * @param event 按键事件
return super.onKeyUp(keyCode, event); * @return 是否处理了该事件
} */
@Override
@Override public boolean onKeyDown(int keyCode, KeyEvent event) {
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) { switch (keyCode) {
if (mOnTextViewChangeListener != null) { case KeyEvent.KEYCODE_ENTER:
if (!focused && TextUtils.isEmpty(getText())) { // 如果设置了监听器，让监听器处理回车键事件
mOnTextViewChangeListener.onTextChange(mIndex, false); if (mOnTextViewChangeListener != null) {
} else { return false;
mOnTextViewChangeListener.onTextChange(mIndex, true); }
} break;
} case KeyEvent.KEYCODE_DEL:
super.onFocusChanged(focused, direction, previouslyFocusedRect); // 记录删除操作前的光标位置
} mSelectionStartBeforeDelete = getSelectionStart();
break;
@Override default:
protected void onCreateContextMenu(ContextMenu menu) { break;
if (getText() instanceof Spanned) { }
int selStart = getSelectionStart(); return super.onKeyDown(keyCode, event);
int selEnd = getSelectionEnd(); }
int min = Math.min(selStart, selEnd); /**
int max = Math.max(selStart, selEnd); * 处理按键释放事件
* @param keyCode 按键码
final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class); * @param event 按键事件
if (urls.length == 1) { * @return 是否处理了该事件
int defaultResId = 0; */
for(String schema: sSchemaActionResMap.keySet()) { @Override
if(urls[0].getURL().indexOf(schema) >= 0) { public boolean onKeyUp(int keyCode, KeyEvent event) {
defaultResId = sSchemaActionResMap.get(schema); switch(keyCode) {
break; case KeyEvent.KEYCODE_DEL:
} // 处理删除键事件：如果光标在文本开头且不是第一个编辑框，则删除当前编辑框
} if (mOnTextViewChangeListener != null) {
if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
if (defaultResId == 0) { mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
defaultResId = R.string.note_link_other; return true;
} }
} else {
menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener( Log.d(TAG, "OnTextViewChangeListener was not seted");
new OnMenuItemClickListener() { }
public boolean onMenuItemClick(MenuItem item) { break;
// goto a new intent case KeyEvent.KEYCODE_ENTER:
urls[0].onClick(NoteEditText.this); // 处理回车键事件：将文本分割并在当前编辑框后添加新的编辑框
return true; if (mOnTextViewChangeListener != null) {
} int selectionStart = getSelectionStart();
}); String text = getText().subSequence(selectionStart, length()).toString();
} setText(getText().subSequence(0, selectionStart));
} mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
super.onCreateContextMenu(menu); } else {
} Log.d(TAG, "OnTextViewChangeListener was not seted");
} }
break;
default:
break;
}
return super.onKeyUp(keyCode, event);
}
/**
* 焦点变化时的回调方法
* @param focused 是否获得焦点
* @param direction 焦点移动方向
* @param previouslyFocusedRect 之前焦点所在的矩形区域
*/
@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
// 通知监听器文本内容状态变化
if (mOnTextViewChangeListener != null) {
if (!focused && TextUtils.isEmpty(getText())) {
mOnTextViewChangeListener.onTextChange(mIndex, false);
} else {
mOnTextViewChangeListener.onTextChange(mIndex, true);
}
}
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
/**
* 创建上下文菜单时的回调方法
* @param menu 上下文菜单
*/
@Override
protected void onCreateContextMenu(ContextMenu menu) {
// 检查选中文本中是否包含链接，如果包含则添加对应的菜单项
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;
// 根据链接协议选择对应的菜单项文本
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;
}
// 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) {
// 打开链接
urls[0].onClick(NoteEditText.this);
return true;
}
});
}
}
super.onCreateContextMenu(menu);
}
}
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