// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.chrome.browser.accessibility.settings;
import android.content.Intent;
import android.os.Bundle;
import android.provider.Settings;
import androidx.preference.Preference;
import androidx.preference.PreferenceFragmentCompat;
import org.chromium.base.ContextUtils;
import org.chromium.base.supplier.ObservableSupplier;
import org.chromium.base.supplier.ObservableSupplierImpl;
import org.chromium.chrome.R;
import org.chromium.chrome.browser.image_descriptions.ImageDescriptionsController;
import org.chromium.chrome.browser.preferences.Pref;
import org.chromium.chrome.browser.settings.SettingsLauncherFactory;
import org.chromium.components.browser_ui.accessibility.AccessibilitySettingsDelegate;
import org.chromium.components.browser_ui.accessibility.FontSizePrefs;
import org.chromium.components.browser_ui.accessibility.FontSizePrefs.FontSizePrefsObserver;
import org.chromium.components.browser_ui.accessibility.PageZoomPreference;
import org.chromium.components.browser_ui.accessibility.PageZoomUma;
import org.chromium.components.browser_ui.accessibility.PageZoomUtils;
import org.chromium.components.browser_ui.settings.ChromeSwitchPreference;
import org.chromium.components.browser_ui.settings.SettingsLauncher;
import org.chromium.components.browser_ui.settings.SettingsPage;
import org.chromium.components.browser_ui.settings.SettingsUtils;
import org.chromium.components.browser_ui.site_settings.AllSiteSettings;
import org.chromium.components.browser_ui.site_settings.SingleCategorySettings;
import org.chromium.components.browser_ui.site_settings.SiteSettingsCategory;
import org.chromium.components.prefs.PrefService;
import org.chromium.content_public.browser.ContentFeatureList;
import org.chromium.content_public.browser.ContentFeatureMap;
/** Fragment to keep track of all the accessibility related preferences. */
public class AccessibilitySettings extends PreferenceFragmentCompat
implements SettingsPage, Preference.OnPreferenceChangeListener {
public static final String PREF_TEXT_SCALE = "text_scale";
public static final String PREF_PAGE_ZOOM_DEFAULT_ZOOM = "page_zoom_default_zoom";
public static final String PREF_PAGE_ZOOM_INCLUDE_OS_ADJUSTMENT =
"page_zoom_include_os_adjustment";
public static final String PREF_PAGE_ZOOM_ALWAYS_SHOW = "page_zoom_always_show";
public static final String PREF_FORCE_ENABLE_ZOOM = "force_enable_zoom";
public static final String PREF_READER_FOR_ACCESSIBILITY = "reader_for_accessibility";
public static final String PREF_CAPTIONS = "captions";
public static final String PREF_ZOOM_INFO = "zoom_info";
public static final String PREF_IMAGE_DESCRIPTIONS = "image_descriptions";
private TextScalePreference mTextScalePref;
private PageZoomPreference mPageZoomDefaultZoomPref;
private ChromeSwitchPreference mPageZoomIncludeOSAdjustment;
private ChromeSwitchPreference mPageZoomAlwaysShowPref;
private ChromeSwitchPreference mForceEnableZoomPref;
private boolean mRecordFontSizeChangeOnStop;
private AccessibilitySettingsDelegate mDelegate;
private double mPageZoomLatestDefaultZoomPrefValue;
private PrefService mPrefService;
private FontSizePrefs mFontSizePrefs;
private FontSizePrefsObserver mFontSizePrefsObserver =
new FontSizePrefsObserver() {
@Override
public void onFontScaleFactorChanged(
float fontScaleFactor, float userFontScaleFactor) {
mTextScalePref.updateFontScaleFactors(
fontScaleFactor, userFontScaleFactor, true);
}
@Override
public void onForceEnableZoomChanged(boolean enabled) {
mForceEnableZoomPref.setChecked(enabled);
}
};
private final ObservableSupplierImpl<String> mPageTitle = new ObservableSupplierImpl<>();
public void setPrefService(PrefService prefService) {
mPrefService = prefService;
}
public void setDelegate(AccessibilitySettingsDelegate delegate) {
mDelegate = delegate;
mFontSizePrefs = FontSizePrefs.getInstance(delegate.getBrowserContextHandle());
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mPageTitle.set(getString(R.string.prefs_accessibility));
}
@Override
public ObservableSupplier<String> getPageTitle() {
return mPageTitle;
}
@Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
SettingsUtils.addPreferencesFromResource(this, R.xml.accessibility_preferences);
mTextScalePref = (TextScalePreference) findPreference(PREF_TEXT_SCALE);
mPageZoomDefaultZoomPref = (PageZoomPreference) findPreference(PREF_PAGE_ZOOM_DEFAULT_ZOOM);
mPageZoomAlwaysShowPref =
(ChromeSwitchPreference) findPreference(PREF_PAGE_ZOOM_ALWAYS_SHOW);
mPageZoomIncludeOSAdjustment =
(ChromeSwitchPreference) findPreference(PREF_PAGE_ZOOM_INCLUDE_OS_ADJUSTMENT);
if (ContentFeatureMap.isEnabled(ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM)) {
mTextScalePref.setVisible(false);
// Set the initial values for the page zoom settings, and set change listeners.
mPageZoomDefaultZoomPref.setInitialValue(
PageZoomUtils.getDefaultZoomAsSeekBarValue(
mDelegate.getBrowserContextHandle()));
mPageZoomDefaultZoomPref.setOnPreferenceChangeListener(this);
mPageZoomAlwaysShowPref.setChecked(PageZoomUtils.shouldShowZoomMenuItem());
mPageZoomAlwaysShowPref.setOnPreferenceChangeListener(this);
// When enhancements (v2) are also enabled, show additional controls.
mPageZoomIncludeOSAdjustment.setVisible(
ContentFeatureMap.isEnabled(
ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM_ENHANCEMENTS));
// When Smart Zoom feature is enabled, set the required delegate.
if (ContentFeatureMap.isEnabled(ContentFeatureList.SMART_ZOOM)) {
mPageZoomDefaultZoomPref.setTextSizeContrastDelegate(
mDelegate.getTextSizeContrastAccessibilityDelegate());
}
} else {
mPageZoomDefaultZoomPref.setVisible(false);
mPageZoomAlwaysShowPref.setVisible(false);
mPageZoomIncludeOSAdjustment.setVisible(false);
mTextScalePref.setOnPreferenceChangeListener(this);
mTextScalePref.updateFontScaleFactors(
mFontSizePrefs.getFontScaleFactor(),
mFontSizePrefs.getUserFontScaleFactor(),
false);
}
mForceEnableZoomPref = (ChromeSwitchPreference) findPreference(PREF_FORCE_ENABLE_ZOOM);
mForceEnableZoomPref.setOnPreferenceChangeListener(this);
mForceEnableZoomPref.setChecked(mFontSizePrefs.getForceEnableZoom());
ChromeSwitchPreference readerForAccessibilityPref =
(ChromeSwitchPreference) findPreference(PREF_READER_FOR_ACCESSIBILITY);
readerForAccessibilityPref.setChecked(
mPrefService.getBoolean(Pref.READER_FOR_ACCESSIBILITY));
readerForAccessibilityPref.setOnPreferenceChangeListener(this);
Preference captions = findPreference(PREF_CAPTIONS);
captions.setOnPreferenceClickListener(
preference -> {
Intent intent = new Intent(Settings.ACTION_CAPTIONING_SETTINGS);
// Open the activity in a new task because the back button on the caption
// settings page navigates to the previous settings page instead of Chrome.
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
return true;
});
Preference zoomInfo = findPreference(PREF_ZOOM_INFO);
if (ContentFeatureMap.isEnabled(ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM)
&& ContentFeatureMap.isEnabled(
ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM_ENHANCEMENTS)) {
zoomInfo.setVisible(true);
zoomInfo.setOnPreferenceClickListener(
preference -> {
Bundle initialArguments = new Bundle();
initialArguments.putString(
SingleCategorySettings.EXTRA_CATEGORY,
SiteSettingsCategory.preferenceKey(SiteSettingsCategory.Type.ZOOM));
SettingsLauncher settingsLauncher =
SettingsLauncherFactory.createSettingsLauncher();
settingsLauncher.launchSettingsActivity(
ContextUtils.getApplicationContext(),
AllSiteSettings.class,
initialArguments);
return true;
});
} else {
zoomInfo.setVisible(false);
}
Preference imageDescriptionsPreference = findPreference(PREF_IMAGE_DESCRIPTIONS);
imageDescriptionsPreference.setVisible(
ImageDescriptionsController.getInstance().shouldShowImageDescriptionsMenuItem());
}
@Override
public void onStart() {
super.onStart();
mFontSizePrefs.addObserver(mFontSizePrefsObserver);
}
@Override
public void onStop() {
mFontSizePrefs.removeObserver(mFontSizePrefsObserver);
if (mRecordFontSizeChangeOnStop) {
mFontSizePrefs.recordUserFontPrefChange();
mRecordFontSizeChangeOnStop = false;
}
// Ensure that the user has set a default zoom value during this session.
if (mPageZoomLatestDefaultZoomPrefValue != 0.0) {
PageZoomUma.logSettingsDefaultZoomLevelChangedHistogram();
PageZoomUma.logSettingsDefaultZoomLevelValueHistogram(
mPageZoomLatestDefaultZoomPrefValue);
}
super.onStop();
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (PREF_TEXT_SCALE.equals(preference.getKey())) {
mRecordFontSizeChangeOnStop = true;
mFontSizePrefs.setUserFontScaleFactor((Float) newValue);
} else if (PREF_FORCE_ENABLE_ZOOM.equals(preference.getKey())) {
mFontSizePrefs.setForceEnableZoomFromUser((Boolean) newValue);
} else if (PREF_READER_FOR_ACCESSIBILITY.equals(preference.getKey())) {
mPrefService.setBoolean(Pref.READER_FOR_ACCESSIBILITY, (Boolean) newValue);
} else if (PREF_PAGE_ZOOM_DEFAULT_ZOOM.equals(preference.getKey())) {
mPageZoomLatestDefaultZoomPrefValue =
PageZoomUtils.convertSeekBarValueToZoomLevel((Integer) newValue);
PageZoomUtils.setDefaultZoomBySeekBarValue(
mDelegate.getBrowserContextHandle(), (Integer) newValue);
} else if (PREF_PAGE_ZOOM_ALWAYS_SHOW.equals(preference.getKey())) {
PageZoomUtils.setShouldAlwaysShowZoomMenuItem((Boolean) newValue);
} else if (PREF_PAGE_ZOOM_INCLUDE_OS_ADJUSTMENT.equals(preference.getKey())) {
// TODO(mschillaci): Implement the override behavior for OS level.
}
return true;
}
}
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