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- /*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * 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 com.vaadin.ui;
-
- import org.jsoup.nodes.Element;
-
- import com.vaadin.shared.ui.AbstractLayoutState;
- import com.vaadin.shared.ui.MarginInfo;
- import com.vaadin.ui.declarative.DesignAttributeHandler;
- import com.vaadin.ui.declarative.DesignContext;
-
- /**
- * An abstract class that defines default implementation for the {@link Layout}
- * interface.
- *
- * @author Vaadin Ltd.
- * @since 5.0
- */
- public abstract class AbstractLayout extends AbstractComponentContainer
- implements Layout {
-
- @Override
- protected AbstractLayoutState getState() {
- return (AbstractLayoutState) super.getState();
- }
-
- @Override
- protected AbstractLayoutState getState(boolean markAsDirty) {
- return (AbstractLayoutState) super.getState(markAsDirty);
- }
-
- /**
- * Reads margin attributes from a design into a MarginInfo object. This
- * helper method should be called from the
- * {@link #readDesign(Element, DesignContext) readDesign} method of layouts
- * that implement {@link MarginHandler}.
- *
- * @since 7.5
- *
- * @param design
- * the design from which to read
- * @param defMargin
- * the default margin state for edges that are not set in the
- * design
- * @param context
- * the DesignContext instance used for parsing the design
- * @return the margin info
- */
- protected MarginInfo readMargin(Element design, MarginInfo defMargin,
- DesignContext context) {
-
- if (design.hasAttr("margin")) {
- boolean margin = DesignAttributeHandler.readAttribute("margin",
- design.attributes(), boolean.class);
- return new MarginInfo(margin);
- } else {
- boolean left = DesignAttributeHandler.readAttribute("margin-left",
- design.attributes(), defMargin.hasLeft(), boolean.class);
-
- boolean right = DesignAttributeHandler.readAttribute("margin-right",
- design.attributes(), defMargin.hasRight(), boolean.class);
-
- boolean top = DesignAttributeHandler.readAttribute("margin-top",
- design.attributes(), defMargin.hasTop(), boolean.class);
-
- boolean bottom = DesignAttributeHandler.readAttribute(
- "margin-bottom", design.attributes(), defMargin.hasBottom(),
- boolean.class);
-
- return new MarginInfo(top, right, bottom, left);
- }
- }
-
- /**
- * Writes margin attributes from a MarginInfo object to a design. This
- * helper method should be called from the
- * {@link #readDesign(Element, DesignContext) writeDesign} method of layouts
- * that implement {@link MarginHandler}.
- *
- *
- * @since 7.5
- *
- * @param design
- * the design to write to
- * @param margin
- * the margin state to write
- * @param defMargin
- * the default margin state to compare against
- * @param context
- * the DesignContext instance used for parsing the design
- */
- protected void writeMargin(Element design, MarginInfo margin,
- MarginInfo defMargin, DesignContext context) {
- if (margin.hasAll()) {
- DesignAttributeHandler.writeAttribute("margin", design.attributes(),
- margin.hasAll(), defMargin.hasAll(), boolean.class,
- context);
- } else {
-
- DesignAttributeHandler.writeAttribute("margin-left",
- design.attributes(), margin.hasLeft(), defMargin.hasLeft(),
- boolean.class, context);
-
- DesignAttributeHandler.writeAttribute("margin-right",
- design.attributes(), margin.hasRight(),
- defMargin.hasRight(), boolean.class, context);
-
- DesignAttributeHandler.writeAttribute("margin-top",
- design.attributes(), margin.hasTop(), defMargin.hasTop(),
- boolean.class, context);
-
- DesignAttributeHandler.writeAttribute("margin-bottom",
- design.attributes(), margin.hasBottom(),
- defMargin.hasBottom(), boolean.class, context);
- }
- }
- }
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