termux-app

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package com.termux.shared.theme;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.appcompat.app.AppCompatDelegate;
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import com.termux.shared.logger.Logger;
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/** The modes used by to decide night mode for themes. */
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public enum NightMode {
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    /** Night theme should be enabled. */
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    TRUE("true", AppCompatDelegate.MODE_NIGHT_YES),
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    /** Dark theme should be enabled. */
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    FALSE("false", AppCompatDelegate.MODE_NIGHT_NO),
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    /**
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     * Use night or dark theme depending on system night mode.
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     * https://developer.android.com/guide/topics/resources/providing-resources#NightQualifier
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     */
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    SYSTEM("system", AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
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    /** The current app wide night mode used by various libraries. Defaults to {@link #SYSTEM}. */
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    private static NightMode APP_NIGHT_MODE;
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    private static final String LOG_TAG = "NightMode";
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    private final String name;
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    private final @AppCompatDelegate.NightMode int mode;
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    NightMode(final String name, int mode) {
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        this.name = name;
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        this.mode = mode;
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    }
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    public String getName() {
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        return name;
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    }
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    public int getMode() {
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        return mode;
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    }
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    /** Get {@link NightMode} for {@code name} if found, otherwise {@code null}. */
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    @Nullable
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    public static NightMode modeOf(String name) {
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        for (NightMode v : NightMode.values()) {
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            if (v.name.equals(name)) {
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                return v;
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            }
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        }
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        return null;
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    }
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    /** Get {@link NightMode} for {@code name} if found, otherwise {@code def}. */
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    @NonNull
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    public static NightMode modeOf(@Nullable String name, @NonNull NightMode def) {
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        NightMode nightMode = modeOf(name);
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        return nightMode != null ? nightMode : def;
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    }
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    /** Set {@link #APP_NIGHT_MODE}. */
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    public static void setAppNightMode(@Nullable String name) {
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        if (name == null || name.isEmpty()) {
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            APP_NIGHT_MODE = SYSTEM;
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        } else {
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            NightMode nightMode = NightMode.modeOf(name);
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            if (nightMode == null) {
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                Logger.logError(LOG_TAG, "Invalid APP_NIGHT_MODE \"" + name + "\"");
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                return;
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            }
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            APP_NIGHT_MODE = nightMode;
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        }
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        Logger.logVerbose(LOG_TAG, "Set APP_NIGHT_MODE to \"" + APP_NIGHT_MODE.getName() + "\"");
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    }
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    /** Get {@link #APP_NIGHT_MODE}. */
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    @NonNull
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    public static NightMode getAppNightMode() {
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        if (APP_NIGHT_MODE == null)
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            APP_NIGHT_MODE =  SYSTEM;
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        return APP_NIGHT_MODE;
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    }
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}
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