81 lines
3.5 KiB
Kotlin
81 lines
3.5 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.settings
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import android.os.Bundle
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import androidx.appcompat.app.AppCompatActivity
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import androidx.preference.PreferenceFragmentCompat
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import androidx.preference.SwitchPreference
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import org.mozilla.fenix.R
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import org.mozilla.fenix.ext.components
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import org.mozilla.fenix.ext.getPreferenceKey
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import org.mozilla.fenix.ext.settings
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/**
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* Displays font size controls for accessibility.
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*
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* Includes an automatic font sizing toggle. When turned on, font sizing follows the Android device settings.
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* When turned off, the font sizing can be controlled manually within the app.
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*/
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class AccessibilityFragment : PreferenceFragmentCompat() {
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override fun onResume() {
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super.onResume()
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(activity as AppCompatActivity).title = getString(R.string.preferences_accessibility)
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(activity as AppCompatActivity).supportActionBar?.show()
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val textSizePreference = findPreference<TextPercentageSeekBarPreference>(
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getPreferenceKey(R.string.pref_key_accessibility_font_scale)
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)
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textSizePreference?.setOnPreferenceChangeListener<Int> { preference, newTextSize ->
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val settings = preference.context.settings()
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val components = preference.context.components
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// Value is mapped from 0->30 in steps of 1 so let's convert to float in range 0.5->2.0
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val newTextScale = ((newTextSize * STEP_SIZE) + MIN_SCALE_VALUE).toFloat() / PERCENT_TO_DECIMAL
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// Save new text scale value. We assume auto sizing is off if this change listener was called.
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settings.fontSizeFactor = newTextScale
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components.core.engine.settings.fontSizeFactor = newTextScale
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// Reload the current session to reflect the new text scale
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components.useCases.sessionUseCases.reload()
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true
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}
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textSizePreference?.isVisible = !requireContext().settings().shouldUseAutoSize
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val useAutoSizePreference =
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findPreference<SwitchPreference>(getPreferenceKey(R.string.pref_key_accessibility_auto_size))
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useAutoSizePreference?.setOnPreferenceChangeListener<Boolean> { preference, useAutoSize ->
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val settings = preference.context.settings()
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val components = preference.context.components
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// Save the new setting value
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settings.shouldUseAutoSize = useAutoSize
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components.core.engine.settings.automaticFontSizeAdjustment = useAutoSize
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// If using manual sizing, update the engine settings with the local saved setting
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if (!useAutoSize) {
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components.core.engine.settings.fontSizeFactor = settings.fontSizeFactor
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}
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// Show the manual sizing controls if automatic sizing is turned off.
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textSizePreference?.isVisible = !useAutoSize
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// Reload the current session to reflect the new text scale
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components.useCases.sessionUseCases.reload()
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true
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}
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}
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override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
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setPreferencesFromResource(R.xml.accessibility_preferences, rootKey)
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}
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companion object {
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const val MIN_SCALE_VALUE = 50
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const val STEP_SIZE = 5
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const val PERCENT_TO_DECIMAL = 100f
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}
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}
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