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/*
* Copyright 2019 The Android Open Source Project
*
* 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 androidx.compose.ui.text.android.style
import kotlin.math.ceil
import android.text.TextPaint
import android.text.style.MetricAffectingSpan
import androidx.compose.ui.text.android.InternalPlatformTextApi
/**
* Span which shifts the vertical position of baseline.
*
* @suppress
*/
@InternalPlatformTextApi
open class BaselineShiftSpan(val multiplier: Float) : MetricAffectingSpan() {
override fun updateMeasureState(textPaint: TextPaint) {
textPaint.baselineShift += ceil(textPaint.ascent() * multiplier).toInt()
}
override fun updateDrawState(textPaint: TextPaint) {
textPaint.baselineShift += ceil(textPaint.ascent() * multiplier).toInt()
}
}