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package net.micode.notes.ui;
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import android.content.Context;
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import android.os.Build;
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import android.text.Editable;
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import android.text.TextWatcher;
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import android.text.style.StrikethroughSpan;
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import android.text.style.StyleSpan;
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import android.text.style.UnderlineSpan;
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import android.util.AttributeSet;
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import android.widget.EditText;
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import android.graphics.Typeface;
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import android.text.Spannable;
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public class RichEditor extends EditText {
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public interface OnTextChangeListener {
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void onTextChange(String text);
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}
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private OnTextChangeListener onTextChangeListener;
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public RichEditor(Context context) {
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super(context);
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init();
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}
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public RichEditor(Context context, AttributeSet attrs) {
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super(context, attrs);
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init();
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}
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public RichEditor(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init();
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}
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private void init() {
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// 初始化逻辑
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}
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public void setOnTextChangeListener(OnTextChangeListener listener) {
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this.onTextChangeListener = listener;
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// 监听文本变化
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addTextChangedListener(new TextWatcher() {
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@Override
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public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
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@Override
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public void onTextChanged(CharSequence s, int start, int before, int count) {
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if (onTextChangeListener != null) {
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onTextChangeListener.onTextChange(s.toString());
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}
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}
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@Override
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public void afterTextChanged(Editable s) {}
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});
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}
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// 重写获取文本的方法
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@Override
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public Editable getText() {
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return super.getText();
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}
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// 重写设置文本的方法，包括设置文本颜色、文本样式等
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@Override
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public void setText(CharSequence text, BufferType type) {
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super.setText(text, type);
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}
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// 重写设置光标位置的方法
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@Override
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public void setSelection(int index) {
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super.setSelection(index);
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}
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// 重写设置选中文本的方法
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@Override
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public void setSelection(int start, int stop) {
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super.setSelection(start, stop);
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}
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// 重写获取选中文本起始位置的方法
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@Override
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public int getSelectionStart() {
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return super.getSelectionStart();
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}
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// 重写获取选中文本结束位置的方法
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@Override
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public int getSelectionEnd() {
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return super.getSelectionEnd();
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}
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// 重写设置文本外观的方法，文本外观包括字体、颜色等
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@Override
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public void setTextAppearance(Context context, int resid) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
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super.setTextAppearance(resid);
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} else {
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// 对旧版本的兼容处理
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setTextAppearance(context, resid);
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}
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}
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// 设置编辑器高度
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public void setEditorHeight(int pixels) {
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this.setHeight(pixels);
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}
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//设置编辑器字体大小
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public void setEditorFontSize(int size) {
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this.setTextSize(size);
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}
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//设置编辑器字体颜色
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public void setEditorFontColor(int color) {
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this.setTextColor(color);
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}
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//设置占位符文本
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public void setPlaceholder(String placeholder) {
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this.setHint(placeholder);
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}
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// 设置编辑器启用或禁用输入
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public void setInputEnabled(boolean enabled) {
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this.setEnabled(enabled);
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}
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//切换粗体样式
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public void toggleBold() {
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toggleStyleSpan(Typeface.BOLD);
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}
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//切换斜体样式
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public void toggleItalic() {
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toggleStyleSpan(Typeface.ITALIC);
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}
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//切换删除线样式
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public void toggleStrikeThrough() {
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toggleSpan(StrikethroughSpan.class, new StrikethroughSpan());
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}
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//切换下划线样式
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public void toggleUnderline() {
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toggleSpan(UnderlineSpan.class, new UnderlineSpan());
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}
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// 粗体、斜体样式切换方法
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private void toggleStyleSpan(int style) {
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int start = getSelectionStart();
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int end = getSelectionEnd();
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if (start < 0 || end < 0 || start >= end) {
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return; // 没有选中文本时不处理
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}
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Spannable str = getText();
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StyleSpan[] spans = str.getSpans(start, end, StyleSpan.class);
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boolean hasStyle = false;
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// 检查是否已存在相同样式
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for (StyleSpan span : spans) {
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if (span.getStyle() == style) {
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str.removeSpan(span);
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hasStyle = true;
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}
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}
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// 如果不存在对应样式，则添加
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if (!hasStyle) {
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str.setSpan(new StyleSpan(style), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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//通用的Span切换方法，下划线和删除线
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private <T> void toggleSpan(Class<T> spanType, T newSpan) {
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int start = getSelectionStart();
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int end = getSelectionEnd();
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if (start < 0 || end < 0 || start >= end) {
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return;
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}
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Spannable str = getText();
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@SuppressWarnings("unchecked")
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T[] spans = (T[]) str.getSpans(start, end, spanType);
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if (spans.length > 0) {
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// 如果已存在样式，则移除
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for (T span : spans) {
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str.removeSpan(span);
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}
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} else {
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// 如果不存在样式，则添加
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str.setSpan(newSpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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// 应用粗体样式
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public void applyBold() {
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int start = getSelectionStart();
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int end = getSelectionEnd();
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if (start >= 0 && end >= 0 && start != end) {
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Spannable str = getText();
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StyleSpan[] spans = str.getSpans(start, end, StyleSpan.class);
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for (StyleSpan span : spans) {
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if (span.getStyle() == Typeface.BOLD) {
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str.removeSpan(span);
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}
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}
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str.setSpan(new StyleSpan(Typeface.BOLD), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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// 应用斜体样式
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public void applyItalic() {
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int start = getSelectionStart();
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int end = getSelectionEnd();
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if (start >= 0 && end >= 0 && start != end) {
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Spannable str = getText();
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StyleSpan[] spans = str.getSpans(start, end, StyleSpan.class);
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for (StyleSpan span : spans) {
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if (span.getStyle() == Typeface.ITALIC) {
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str.removeSpan(span);
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}
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}
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str.setSpan(new StyleSpan(Typeface.ITALIC), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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// 应用删除线样式
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public void applyStrikeThrough() {
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int start = getSelectionStart();
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int end = getSelectionEnd();
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if (start >= 0 && end >= 0 && start != end) {
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Spannable str = getText();
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StrikethroughSpan[] spans = str.getSpans(start, end, StrikethroughSpan.class);
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for (StrikethroughSpan span : spans) {
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str.removeSpan(span);
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}
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str.setSpan(new StrikethroughSpan(), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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// 应用下划线样式
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public void applyUnderline() {
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int start = getSelectionStart();
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int end = getSelectionEnd();
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if (start >= 0 && end >= 0 && start != end) {
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Spannable str = getText();
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UnderlineSpan[] spans = str.getSpans(start, end, UnderlineSpan.class);
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for (UnderlineSpan span : spans) {
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str.removeSpan(span);
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}
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str.setSpan(new UnderlineSpan(), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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} |
