content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library 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 2.1 of the License, or (at your option) any later version.
   *
   * This library 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.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.gwt.client.ui.input;
  
  import org.opencms.gwt.client.CmsCoreProvider;
  import org.opencms.gwt.client.Messages;
  import org.opencms.gwt.client.ui.CmsPushButton;
  import org.opencms.gwt.client.ui.I_CmsAutoHider;
  import org.opencms.gwt.client.ui.I_CmsButton;
  import org.opencms.gwt.client.ui.I_CmsButton.ButtonStyle;
  import org.opencms.gwt.client.ui.I_CmsButton.Size;
  import org.opencms.gwt.client.ui.input.form.CmsWidgetFactoryRegistry;
  import org.opencms.gwt.client.ui.input.form.I_CmsFormWidgetFactory;
  import org.opencms.gwt.shared.CmsLinkBean;
  import org.opencms.util.CmsStringUtil;
  
  import java.util.List;
  import java.util.Map;
  
  import com.google.common.base.Optional;
  import com.google.gwt.core.client.GWT;
  import com.google.gwt.dom.client.Style;
  import com.google.gwt.dom.client.Style.Cursor;
  import com.google.gwt.dom.client.Style.Position;
  import com.google.gwt.dom.client.Style.Unit;
  import com.google.gwt.dom.client.Style.Visibility;
  import com.google.gwt.event.dom.client.ClickEvent;
  import com.google.gwt.event.dom.client.ClickHandler;
  import com.google.gwt.uibinder.client.UiBinder;
  import com.google.gwt.uibinder.client.UiField;
  import com.google.gwt.user.client.ui.Composite;
  import com.google.gwt.user.client.ui.HorizontalPanel;
  import com.google.gwt.user.client.ui.Panel;
  
  /**
   * Widget for selecting an internal or external link.<p>
   *
   * @since 8.0.0
   */
  public class CmsLinkSelector extends Composite implements I_CmsFormWidget, I_CmsHasGhostValue {
  
      /**
       * The UI Binder interface for this widget.<p>
       */
      protected interface I_CmsLinkSelectorUiBinder extends UiBinder<Panel, CmsLinkSelector> {
          // binder interface
      }
  
      /** The widget type. */
      public static final String WIDGET_TYPE = "link";
  
      /** The ui binder for this widget. */
      private static I_CmsLinkSelectorUiBinder uibinder = GWT.create(I_CmsLinkSelectorUiBinder.class);
  
      /** The button for editing the link. */
      @UiField
      protected CmsPushButton m_editButton;
  
      /** The check box for setting the link to external or internal. */
      @UiField
      protected CmsCheckBox m_externalCheckbox;
  
      /** The row containing the input field and the gallery edit button. */
      @UiField
      protected HorizontalPanel m_inputRow;
  
      /** The text box containing the current link. */
      @UiField
      protected CmsTextBox m_textbox;
  
      /** The HTML id of the field. */
      private String m_id;
  
      /** True if the widget is in "internal" mode. */
      private boolean m_internal;
  
      /**
       * Constructs a new gallery widget.<p>
       */
      public CmsLinkSelector() {
  
          initWidget(uibinder.createAndBindUi(this));
          m_id = m_textbox.getId();
          String label = Messages.get().key(Messages.GUI_LINK_CHECKBOX_EXTERNAL_0);
          m_externalCheckbox.setText(label);
          m_inputRow.setCellWidth(m_textbox.getTextBox(), "330px");
          m_editButton.setButtonStyle(ButtonStyle.FONT_ICON, null);
          m_editButton.setImageClass(I_CmsButton.PEN_SMALL);
          m_editButton.addClickHandler(new ClickHandler() {
  
              public void onClick(ClickEvent event) {
  
                  openGalleryDialog();
              }
          });
          m_externalCheckbox.addClickHandler(new ClickHandler() {
  
              public void onClick(ClickEvent event) {
  
                  userChangedExternal(m_externalCheckbox.isChecked());
              }
          });
          setInternal(false);
      }
  
      /**
       * Initializes this class.<p>
       */
      public static void initClass() {
  
          // registers a factory for creating new instances of this widget
          CmsWidgetFactoryRegistry.instance().registerFactory(WIDGET_TYPE, new I_CmsFormWidgetFactory() {
  
              /**
               * @see org.opencms.gwt.client.ui.input.form.I_CmsFormWidgetFactory#createWidget(java.util.Map, com.google.common.base.Optional)
               */
              public I_CmsFormWidget createWidget(Map<String, String> widgetParams, Optional<String> defaultValue) {
  
                  return new CmsLinkSelector();
              }
          });
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#getApparentValue()
       */
      public String getApparentValue() {
  
          return getFormValueAsString();
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#getFieldType()
       */
      public FieldType getFieldType() {
  
          return FieldType.STRING;
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#getFormValue()
       */
      public Object getFormValue() {
  
          return m_textbox.getFormValue();
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#getFormValueAsString()
       */
      public String getFormValueAsString() {
  
          String link = m_textbox.getFormValueAsString();
          return m_internal + "|" + link;
      }
  
      /**
       * Returns the selected link target string.<p>
       *
       * @return the link target string
       */
      public String getLink() {
  
          return m_textbox.getFormValueAsString();
      }
  
      /**
       * Returns the selected link as a bean.<p>
       *
       * @return the selected link as a bean
       */
      public CmsLinkBean getLinkBean() {
  
          String link = m_textbox.getText();
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(link)) {
              return null;
          }
          return new CmsLinkBean(m_textbox.getText(), m_internal);
      }
  
      /**
       * Returns the text box of this widget.<p>
       *
       * @return the CmsTextBox.
       */
      public CmsTextBox getTextBox() {
  
          return m_textbox;
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#isEnabled()
       */
      public boolean isEnabled() {
  
          return !m_textbox.isReadOnly();
      }
  
      /**
       * Returns true if the widget is in internal mode.
       *
       * @return true if the widget is in internal mode
       */
      public boolean isInternal() {
  
          return m_internal;
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#reset()
       */
      public void reset() {
  
          m_textbox.reset();
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#setAutoHideParent(org.opencms.gwt.client.ui.I_CmsAutoHider)
       */
      public void setAutoHideParent(I_CmsAutoHider autoHideParent) {
  
          // do nothing
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#setEnabled(boolean)
       */
      public void setEnabled(boolean enabled) {
  
          m_textbox.setReadOnly(!enabled);
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#setErrorMessage(java.lang.String)
       */
      public void setErrorMessage(String errorMessage) {
  
          // do nothing
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsFormWidget#setFormValueAsString(java.lang.String)
       */
      public void setFormValueAsString(String value) {
  
          boolean internal = true;
          String link = "";
  
          if (!CmsStringUtil.isEmptyOrWhitespaceOnly(value)) {
              List<String> tokens = CmsStringUtil.splitAsList(value, "|");
              internal = Boolean.parseBoolean(tokens.get(0));
              link = tokens.get(1);
          }
          setInternal(internal);
          m_textbox.setFormValueAsString(link);
  
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsHasGhostValue#setGhostMode(boolean)
       */
      public void setGhostMode(boolean ghostMode) {
  
          m_textbox.setGhostMode(ghostMode);
      }
  
      /**
       * @see org.opencms.gwt.client.ui.input.I_CmsHasGhostValue#setGhostValue(java.lang.String, boolean)
       */
      public void setGhostValue(String value, boolean isGhostMode) {
  
          m_textbox.setGhostValue(value, isGhostMode);
      }
  
      /**
       * Sets the widget's mode to internal or external.<p>
       *
       * @param internal if true, sets the mode to internal, else to external
       */
      public void setInternal(boolean internal) {
  
          m_internal = internal;
          m_textbox.setReadOnly(internal);
          m_editButton.setEnabled(internal);
          m_editButton.getElement().getStyle().setVisibility(internal ? Visibility.VISIBLE : Visibility.HIDDEN);
          //m_editButton.setVisible(internal);
          m_externalCheckbox.setChecked(!internal);
      }
  
      /**
       * Sets the link target.<p>
       *
       * @param link the link target
       */
      public void setLink(String link) {
  
          if (link == null) {
              link = "";
          }
          m_textbox.setFormValueAsString(link);
      }
  
      /**
       * Sets the link from a bean.<p>
       *
       * @param link the link bean
       */
      public void setLinkBean(CmsLinkBean link) {
  
          if (link == null) {
              link = new CmsLinkBean("", true);
          }
          m_textbox.setFormValueAsString(link.getLink());
          setInternal(link.isInternal());
      }
  
      /**
       * Sets the name of the input field.<p>
       *
       * @param name of the input field
       * */
      public void setName(String name) {
  
          m_textbox.setName(name);
  
      }
  
      /**
       * Creates the URL for the gallery dialog IFrame.<p>
       *
       * @return the URL for the gallery dialog IFrame
       */
      protected String buildGalleryUrl() {
  
          String basePath = "/system/workplace/commons/gallery.jsp";
          return CmsCoreProvider.get().link(basePath + "?dialogmode=widget&fieldid=" + m_id);
      }
  
      /**
       * Internal method which opens the gallery dialog.<p>
       */
      protected void openGalleryDialog() {
  
          String title = org.opencms.gwt.client.Messages.get().key(
              org.opencms.gwt.client.Messages.GUI_GALLERY_SELECT_DIALOG_TITLE_0);
          final CmsFramePopup popup = new CmsFramePopup(title, buildGalleryUrl());
          popup.setCloseHandler(new Runnable() {
  
              public void run() {
  
                  m_textbox.setGhostMode(false);
  
              }
  
          });
          popup.setId(m_id);
          popup.getFrame().setSize("700px", "490px");
          popup.center();
  
          CmsPushButton button = new CmsPushButton(I_CmsButton.DELETE_SMALL);
          button.setButtonStyle(ButtonStyle.FONT_ICON, null);
          button.setSize(Size.small);
          Style style = button.getElement().getStyle();
          style.setRight(4, Unit.PX);
          style.setTop(0, Unit.PX);
          style.setPosition(Position.ABSOLUTE);
          style.setCursor(Cursor.POINTER);
          button.addClickHandler(new ClickHandler() {
  
              /**
               * @see com.google.gwt.event.dom.client.ClickHandler#onClick(com.google.gwt.event.dom.client.ClickEvent)
               */
              public void onClick(ClickEvent event) {
  
                  popup.hide();
              }
          });
  
          popup.insertFront(button);
      }
  
      /**
       * Called if the user changed the state to internal or external.<p>
       *
       * @param external if the new state is "external"
       */
      protected void userChangedExternal(boolean external) {
  
          if (!external) {
              m_textbox.setFormValueAsString("");
          }
          setInternal(!external);
      }
  
  }
  