fr.putnami.pwt.core.widget.client.util.StyleUtils.java Source code

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Here is the source code for fr.putnami.pwt.core.widget.client.util.StyleUtils.java

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/**
 * This file is part of pwt.
 *
 * pwt is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * pwt is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with pwt. If not,
 * see <http://www.gnu.org/licenses/>.
 */
package fr.putnami.pwt.core.widget.client.util;

import com.google.common.base.CaseFormat;
import com.google.gwt.dom.client.Element;
import com.google.gwt.user.client.ui.Widget;

import fr.putnami.pwt.core.theme.client.CssStyle;

public final class StyleUtils {

    private StyleUtils() {
    }

    public static <S extends CssStyle> void removeStyle(Element e, S style) {
        if (e == null) {
            return;
        }
        if (style instanceof Enum) {
            StyleUtils.cleanEnumStyle(e, style.getClass());
        }
        String styleName = StyleUtils.getStyle(style);
        String currentClassName = e.getClassName();
        if (styleName != null && currentClassName != null && e.hasClassName(styleName)) {
            e.removeClassName(styleName);
        }
    }

    public static <S extends CssStyle> void removeStyle(Widget w, S style) {
        if (w == null) {
            return;
        }
        StyleUtils.removeStyle(w.getElement(), style);
    }

    public static <S extends CssStyle> void addStyle(Widget w, S style) {
        if (w == null) {
            return;
        }
        StyleUtils.addStyle(w.getElement(), style);
    }

    public static <S extends CssStyle> void addStyle(Element e, S style) {
        if (e == null) {
            return;
        }
        if (style instanceof Enum) {
            StyleUtils.cleanEnumStyle(e, style.getClass());
        } else if (style instanceof Iterable) {
            for (Object toRemove : (Iterable) style) {
                if (toRemove instanceof CssStyle) {
                    CssStyle styleToRemove = (CssStyle) toRemove;
                    String styleName = styleToRemove.get();
                    if (styleName != null && e.hasClassName(styleName)) {
                        e.removeClassName(styleName);
                    }
                }
            }
        }
        String styleName = StyleUtils.getStyle(style);
        if (styleName != null) {
            e.addClassName(styleName);
        }
    }

    public static <S extends CssStyle> void toggleStyle(Element e, S style, boolean value) {
        if (e == null || style == null) {
            return;
        }
        if (value) {
            StyleUtils.addStyle(e, style);
        } else {
            StyleUtils.removeStyle(e, style);
        }
    }

    public static <S extends CssStyle> void toggleStyle(Widget w, S style, boolean value) {
        if (w == null) {
            return;
        }
        StyleUtils.toggleStyle(w.getElement(), style, value);
    }

    public static void cleanEnumStyle(Element e, Class<?> enumClass) {
        if (enumClass == null) {
            return;
        }
        for (Object enumValue : enumClass.getEnumConstants()) {
            if (enumValue instanceof CssStyle) {
                String currentClassName = e.getClassName();
                String styleName = ((CssStyle) enumValue).get();
                if (styleName != null && currentClassName != null && e.hasClassName(styleName)) {
                    e.removeClassName(styleName);
                }
            }
        }
    }

    public static void initStyle(Widget w) {
        if (w != null && w.getElement() != null) {
            String widgetClassName = "p-"
                    + CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_HYPHEN, w.getClass().getSimpleName());
            w.getElement().addClassName(widgetClassName);
        }
    }

    public static void cloneStyle(Widget target, Widget source) {
        target.getElement().setClassName(source.getElement().getClassName());
    }

    private static <S extends CssStyle> String getStyle(S value) {
        if (value == null || value.get() == null) {
            return null;
        }
        return value.get();
    }
}