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A GWT Library that provides the widgets of Twitter Bootstrap.
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/*
 *  Copyright 2012 GWT-Bootstrap
 *
 *  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.github.gwtbootstrap.client.ui;

import java.util.List;

import com.github.gwtbootstrap.client.ui.base.HasAlternateSize;
import com.github.gwtbootstrap.client.ui.base.HasId;
import com.github.gwtbootstrap.client.ui.base.HasSize;
import com.github.gwtbootstrap.client.ui.base.IsSearchQuery;
import com.github.gwtbootstrap.client.ui.base.SearchQueryStyleHelper;
import com.github.gwtbootstrap.client.ui.base.SizeHelper;
import com.github.gwtbootstrap.client.ui.base.StyleHelper;
import com.github.gwtbootstrap.client.ui.constants.AlternateSize;
import com.github.gwtbootstrap.client.ui.constants.Constants;
import com.github.gwtbootstrap.client.ui.constants.ControlGroupType;
import com.google.gwt.dom.client.Element;
import com.google.gwt.editor.client.EditorError;
import com.google.gwt.editor.client.HasEditorErrors;
import com.google.gwt.editor.client.IsEditor;
import com.google.gwt.editor.ui.client.adapters.HasTextEditor;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.Widget;


/**
 * A FileInput for Bootstrap form.
 * @since 2.0.4.0
 * @author ohashi keisuke
 *
 */
public class FileUpload extends com.google.gwt.user.client.ui.FileUpload 
	implements HasSize, HasAlternateSize, IsSearchQuery, HasId,
		HasText, IsEditor, HasEditorErrors {
	
	/** Widget for control decoration on EditorErrors */
	private Widget controlGroup;// could be a ControlGroup widget
	/** Widget where EditorErrors messages will be placed */
	private Widget errorLabel;// could be a HelpInline widget
	
	{
		setStyleName("");
	}

	/**
	 * 
	 * @see com.google.gwt.editor.client.HasEditorErrors#showErrors(java.util.List)
	 */
	@Override
	public void showErrors(List errors) {
		Widget decoratedWidget = controlGroup != null? controlGroup : this;
		if(errors != null && !errors.isEmpty()) {
			StyleHelper.addStyle(decoratedWidget, ControlGroupType.ERROR);
			SafeHtmlBuilder sb = new SafeHtmlBuilder();
			for (EditorError error : errors) {
				if(error.getEditor() == this) {
					error.setConsumed(true);
					sb.appendEscaped(error.getMessage());
					sb.appendHtmlConstant("
");
				}
			}
			setErrorLabelText(sb.toSafeHtml().asString());
		} else {
			StyleHelper.removeStyle(decoratedWidget, ControlGroupType.ERROR);
			setErrorLabelText("");
		}
	}

	/**
	 * The widget that will be decorated on EditorErrors will be added de ControlGroupType.ERROR style.
	 * It can be a ControlGroup or any widget.
	 * @param controlGroup
	 */
	public void setControlGroup(Widget controlGroup) {
		this.controlGroup = controlGroup;
	}
	/**
	 * Widget where EditorErrors messages will be placed.
	 * It can be a HelpBlock or any other widget.
	 * @param errorLabel
	 */
	public void setErrorLabel(Widget errorLabel) {
		this.errorLabel = errorLabel;
	}

	/**
	 * Sets the content of the EditorErrors messages inside de errorLabel.
	 * This implementation uses {@link Element#setInnerHTML(String)} to set the content.
	 * @param errorMessage
	 */
	protected void setErrorLabelText(String errorMessage) {
		if(errorLabel != null) {
			errorLabel.getElement().setInnerHTML(errorMessage);
		}
	}

	@Override
	public HasTextEditor asEditor() {
		return HasTextEditor.of(this);
	}

	@Override
	public String getText() {
		String filename = getFilename();
		return filename != null && !"".equals(filename.trim())?
				filename : null;
	}

	@Override
	public void setText(String value) {
		try {
			getElement().setAttribute("value", value);
		} catch (Exception ignored) {
		}
	}
	
	/**
	 * {@inheritDoc}
	 */
	@Override
	public void setAlternateSize(AlternateSize size) {
		StyleHelper.changeStyle(this, size, AlternateSize.class);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void setSize(int size) {
		SizeHelper.setSize(this, size);
	}
	
	/**
	 * {@inheritDoc}
	 */
	@Override
	public void setSearchQuery(boolean searchQuery) {
		SearchQueryStyleHelper.setSearchQuery(this, searchQuery);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean isSearchQuery() {
		return SearchQueryStyleHelper.isSearchQuery(this);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public String getId() {
		return getElement().getId();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void setId(String id) {
		getElement().setId(id);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void setEnabled(boolean enabled) {
		super.setEnabled(enabled);
		if(enabled) {
			removeStyleName(Constants.DISABLED);
		} else {
			addStyleName(Constants.DISABLED);
		}
	}
}