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限制源编辑框的最大行数,滚动到其他输入框更容易
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@ -1,5 +1,6 @@
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package io.legado.app.ui.widget.code
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import android.annotation.SuppressLint
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.Paint
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@ -12,6 +13,7 @@ import android.text.style.BackgroundColorSpan
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import android.text.style.ForegroundColorSpan
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import android.text.style.ReplacementSpan
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import android.util.AttributeSet
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import android.view.MotionEvent
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import androidx.annotation.ColorInt
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import androidx.appcompat.widget.AppCompatMultiAutoCompleteTextView
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import java.util.*
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@ -37,6 +39,12 @@ class CodeView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
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private val mSyntaxPatternMap: MutableMap<Pattern, Int> = HashMap()
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private var mIndentCharacterList = mutableListOf('{', '+', '-', '*', '/', '=')
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//滑动距离的最大边界
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private var mOffsetHeight = 0
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//是否到顶或者到底的标志
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private var mBottomFlag = false
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private val mUpdateRunnable = Runnable {
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val source = text
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highlightWithoutChange(source)
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@ -102,6 +110,83 @@ class CodeView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
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addTextChangedListener(mEditorTextWatcher)
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}
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override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec)
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initOffsetHeight()
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}
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override fun onTextChanged(
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text: CharSequence,
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start: Int,
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lengthBefore: Int,
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lengthAfter: Int
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) {
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super.onTextChanged(text, start, lengthBefore, lengthAfter)
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initOffsetHeight()
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}
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override fun dispatchTouchEvent(event: MotionEvent): Boolean {
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if (event.action == MotionEvent.ACTION_DOWN) {
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//如果是新的按下事件,则对mBottomFlag重新初始化
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mBottomFlag = mOffsetHeight <= 0
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}
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return super.dispatchTouchEvent(event)
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}
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@SuppressLint("ClickableViewAccessibility")
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override fun onTouchEvent(event: MotionEvent): Boolean {
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val result = super.onTouchEvent(event)
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//如果是需要拦截,则再拦截,这个方法会在onScrollChanged方法之后再调用一次
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if (!mBottomFlag) parent.requestDisallowInterceptTouchEvent(true)
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return result
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}
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override fun onScrollChanged(horiz: Int, vert: Int, oldHoriz: Int, oldVert: Int) {
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super.onScrollChanged(horiz, vert, oldHoriz, oldVert)
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if (vert == mOffsetHeight || vert == 0) {
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//这里触发父布局或祖父布局的滑动事件
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parent.requestDisallowInterceptTouchEvent(false)
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mBottomFlag = true
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}
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}
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override fun showDropDown() {
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val screenPoint = IntArray(2)
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getLocationOnScreen(screenPoint)
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val displayFrame = Rect()
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getWindowVisibleDisplayFrame(displayFrame)
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val position = selectionStart
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val layout = layout
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val line = layout.getLineForOffset(position)
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val verticalDistanceInDp = (750 + 140 * line) / displayDensity
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dropDownVerticalOffset = verticalDistanceInDp.toInt()
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val horizontalDistanceInDp = layout.getPrimaryHorizontal(position) / displayDensity
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dropDownHorizontalOffset = horizontalDistanceInDp.toInt()
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super.showDropDown()
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}
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private fun initOffsetHeight() {
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val mLayoutHeight: Int
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//获得内容面板
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val mLayout = layout ?: return
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//获得内容面板的高度
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mLayoutHeight = mLayout.height
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//获取上内边距
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val paddingTop: Int = totalPaddingTop
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//获取下内边距
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val paddingBottom: Int = totalPaddingBottom
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//获得控件的实际高度
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val mHeight: Int = measuredHeight
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//计算滑动距离的边界
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mOffsetHeight = mLayoutHeight + paddingTop + paddingBottom - mHeight
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if (mOffsetHeight <= 0) {
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scrollTo(0, 0)
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}
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}
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private fun autoIndent(
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source: CharSequence,
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dest: Spanned,
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@ -365,21 +450,6 @@ class CodeView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
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highlightWhileTextChanging = updateWhileTextChanging
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}
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override fun showDropDown() {
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val screenPoint = IntArray(2)
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getLocationOnScreen(screenPoint)
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val displayFrame = Rect()
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getWindowVisibleDisplayFrame(displayFrame)
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val position = selectionStart
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val layout = layout
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val line = layout.getLineForOffset(position)
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val verticalDistanceInDp = (750 + 140 * line) / displayDensity
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dropDownVerticalOffset = verticalDistanceInDp.toInt()
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val horizontalDistanceInDp = layout.getPrimaryHorizontal(position) / displayDensity
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dropDownHorizontalOffset = horizontalDistanceInDp.toInt()
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super.showDropDown()
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}
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private inner class TabWidthSpan : ReplacementSpan() {
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override fun getSize(
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paint: Paint,
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@ -9,6 +9,7 @@
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android:id="@+id/editText"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:inputType="textMultiLine" />
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android:inputType="textMultiLine"
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android:maxLines="12" />
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</io.legado.app.ui.widget.text.TextInputLayout>
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