135 lines
4.1 KiB
Kotlin
135 lines
4.1 KiB
Kotlin
package com.gh.common.util
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import android.content.Context
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import android.graphics.Color
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import android.text.Spannable
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import android.text.SpannableStringBuilder
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import android.text.Spanned
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import android.text.TextPaint
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import android.text.method.LinkMovementMethod
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import android.text.style.ClickableSpan
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import android.text.style.ForegroundColorSpan
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import android.text.style.UnderlineSpan
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import android.view.View
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import android.widget.TextView
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import androidx.annotation.StringRes
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import androidx.core.content.ContextCompat
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/**
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* @author : liujiarui
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* date : 2023/3/22
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* description : 文本颜色事件控制
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*/
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//作用域进行限制
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@DslMarker
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@Target(AnnotationTarget.TYPE)
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annotation class TextSpanDsl
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interface DslSpannableStringBuilder {
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//增加一段文字
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fun addText(text: String, method: (@TextSpanDsl DslSpanBuilder.() -> Unit)? = null)
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fun addText(@StringRes stringRes: Int, method: (@TextSpanDsl DslSpanBuilder.() -> Unit)? = null)
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}
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interface DslSpanBuilder {
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//设置文字颜色文本
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fun setColor(color: String)
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//设置文字颜色int
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fun setColor(color: ColorInt)
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//设置文字颜色id
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fun setColor(color: ColorResId)
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//设置点击事件
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fun onClick(useUnderLine: Boolean = false, onClick: (View) -> Unit)
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}
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//为 TextView 创建扩展函数，其参数为接口的扩展函数
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fun TextView.buildSpannableString(init: @TextSpanDsl DslSpannableStringBuilder.() -> Unit) {
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//具体实现类
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val spanStringBuilderImpl = DslSpannableStringBuilderImpl(context)
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spanStringBuilderImpl.init()
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movementMethod = LinkMovementMethod.getInstance()
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//通过实现类返回SpannableStringBuilder
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text = spanStringBuilderImpl.build()
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}
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class DslSpannableStringBuilderImpl(val context: Context) : DslSpannableStringBuilder {
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private val builder = SpannableStringBuilder()
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//记录上次添加文字后最后的索引值
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private var lastIndex: Int = 0
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var isClickable = false
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override fun addText(text: String, method: (@TextSpanDsl DslSpanBuilder.() -> Unit)?) {
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val start = lastIndex
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builder.append(text)
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lastIndex += text.length
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val spanBuilder = DslSpanBuilderImpl(context)
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method?.let { spanBuilder.it() }
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spanBuilder.apply {
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onClickSpan?.let {
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builder.setSpan(it, start, lastIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
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isClickable = true
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}
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if (!useUnderLine) {
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val noUnderlineSpan = NoUnderlineSpan()
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builder.setSpan(noUnderlineSpan, start, lastIndex, Spanned.SPAN_MARK_MARK)
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}
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foregroundColorSpan?.let {
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builder.setSpan(it, start, lastIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
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}
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}
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}
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override fun addText(stringRes: Int, method: (@TextSpanDsl DslSpanBuilder.() -> Unit)?) {
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val text = context.getString(stringRes)
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addText(text, method)
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}
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fun build(): SpannableStringBuilder {
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return builder
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}
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}
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class DslSpanBuilderImpl(val context: Context) : DslSpanBuilder {
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var foregroundColorSpan: ForegroundColorSpan? = null
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var onClickSpan: ClickableSpan? = null
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var useUnderLine = true
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override fun setColor(color: String) {
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foregroundColorSpan = ForegroundColorSpan(Color.parseColor(color))
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}
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override fun setColor(color: ColorInt) {
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foregroundColorSpan = ForegroundColorSpan(color.color)
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}
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override fun setColor(color: ColorResId) {
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val c = ContextCompat.getColor(context, color.colorResId)
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foregroundColorSpan = ForegroundColorSpan(c)
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}
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override fun onClick(useUnderLine: Boolean, onClick: (View) -> Unit) {
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onClickSpan = object : ClickableSpan() {
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override fun onClick(widget: View) {
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onClick(widget)
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}
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}
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this.useUnderLine = useUnderLine
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}
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}
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@JvmInline
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value class ColorInt(val color: Int)
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@JvmInline
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value class ColorResId(val colorResId: Int)
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class NoUnderlineSpan : UnderlineSpan() {
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override fun updateDrawState(ds: TextPaint) {
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ds.color = ds.linkColor
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ds.isUnderlineText = false
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}
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} |