| /* |
| * Copyright 2020 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.ui.text.platform.style |
| |
| import android.graphics.Typeface |
| import android.graphics.fonts.FontStyle |
| import android.os.Build |
| import android.text.TextPaint |
| import android.text.style.MetricAffectingSpan |
| import androidx.annotation.VisibleForTesting |
| import androidx.ui.text.platform.InternalPlatformTextApi |
| |
| /** |
| * Span that changes the typeface of the text. |
| * |
| * @param getTypeface a lambda function that returns the typeface used to render the affected text. |
| * @suppress |
| */ |
| @InternalPlatformTextApi |
| class FontSpan( |
| val getTypeface: (weight: Int, isItalic: Boolean) -> Typeface |
| ) : MetricAffectingSpan() { |
| |
| @VisibleForTesting |
| internal fun updatePaint(textPaint: TextPaint) { |
| val oldTypeface: Typeface? = textPaint.typeface |
| if (oldTypeface == null) { |
| textPaint.typeface = getTypeface(FontStyle.FONT_WEIGHT_NORMAL, false) |
| return |
| } |
| val weight = if (Build.VERSION.SDK_INT <= 28) { |
| if (oldTypeface.isBold) { |
| FontStyle.FONT_WEIGHT_BOLD |
| } else { |
| FontStyle.FONT_WEIGHT_NORMAL |
| } |
| } else { |
| oldTypeface.weight |
| } |
| textPaint.typeface = getTypeface(weight, oldTypeface.isItalic) |
| } |
| |
| override fun updateDrawState(textPaint: TextPaint) { |
| updatePaint(textPaint) |
| } |
| |
| override fun updateMeasureState(textPaint: TextPaint) { |
| updatePaint(textPaint) |
| } |
| } |