/*
    * 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.v7.client.ui.table;
  
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  
  import com.google.gwt.core.client.Scheduler;
  import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.dom.client.EventTarget;
  import com.google.gwt.event.shared.HandlerRegistration;
  import com.google.gwt.user.client.ui.Widget;
  import com.vaadin.client.ApplicationConnection;
  import com.vaadin.client.ComponentConnector;
  import com.vaadin.client.ConnectorHierarchyChangeEvent;
  import com.vaadin.client.ConnectorHierarchyChangeEvent.ConnectorHierarchyChangeHandler;
  import com.vaadin.client.DirectionalManagedLayout;
  import com.vaadin.client.HasChildMeasurementHintConnector;
  import com.vaadin.client.HasComponentsConnector;
  import com.vaadin.client.Paintable;
  import com.vaadin.client.ServerConnector;
  import com.vaadin.client.TooltipInfo;
  import com.vaadin.client.UIDL;
  import com.vaadin.client.WidgetUtil;
  import com.vaadin.client.ui.PostLayoutListener;
  import com.vaadin.shared.MouseEventDetails;
  import com.vaadin.shared.ui.Connect;
  import com.vaadin.v7.client.ui.AbstractFieldConnector;
  import com.vaadin.v7.client.ui.VScrollTablePatched;
  import com.vaadin.v7.client.ui.VScrollTablePatched.ContextMenuDetails;
  import com.vaadin.v7.client.ui.VScrollTable.FooterCell;
  import com.vaadin.v7.client.ui.VScrollTable.HeaderCell;
  import com.vaadin.v7.client.ui.VScrollTablePatched.VScrollTableBody.VScrollTableRow;
  import com.vaadin.v7.shared.ui.table.TableConstants;
  import com.vaadin.v7.shared.ui.table.TableConstants.Section;
  import com.vaadin.v7.shared.ui.table.TableServerRpc;
  import com.vaadin.v7.shared.ui.table.TableState;
  
  //@Connect(com.vaadin.v7.ui.Table.class)
  public class TableConnectorPatched extends AbstractFieldConnector
          implements HasComponentsConnector, ConnectorHierarchyChangeHandler,
          Paintable, DirectionalManagedLayout, PostLayoutListener,
          HasChildMeasurementHintConnector {
  
      private List<ComponentConnector> childComponents;
  
      public TableConnectorPatched() {
          addConnectorHierarchyChangeHandler(this);
      }
  
      @Override
      protected void init() {
          super.init();
          getWidget().init(getConnection());
      }
  
      /*
       * (non-Javadoc)
       *
       * @see com.vaadin.client.ui.AbstractComponentConnector#onUnregister()
       */
      @Override
      public void onUnregister() {
          super.onUnregister();
          getWidget().onUnregister();
      }
  
      @Override
      protected void sendContextClickEvent(MouseEventDetails details,
              EventTarget eventTarget) {
  
          if (!Element.is(eventTarget)) {
              return;
          }
          Element e = Element.as(eventTarget);
  
          Section section;
          String colKey = null;
          String rowKey = null;
          if (getWidget().tFoot.getElement().isOrHasChild(e)) {
              section = Section.FOOTER;
              FooterCell w = WidgetUtil.findWidget(e, FooterCell.class);
              colKey = w.getColKey();
          } else if (getWidget().tHead.getElement().isOrHasChild(e)) {
             section = Section.HEADER;
             HeaderCell w = WidgetUtil.findWidget(e, HeaderCell.class);
             colKey = w.getColKey();
         } else {
             section = Section.BODY;
             if (getWidget().scrollBody.getElement().isOrHasChild(e)) {
                 VScrollTableRow w = getScrollTableRow(e);
                 /*
                  * if w is null because we've clicked on an empty area, we will
                  * let rowKey and colKey be null too, which will then lead to
                  * the server side returning a null object.
                  */
                 if (w != null) {
                     rowKey = w.getKey();
                     colKey = getWidget().tHead
                             .getHeaderCell(getElementIndex(e, w.getElement()))
                             .getColKey();
                 }
             }
         }
 
         getRpcProxy(TableServerRpc.class).contextClick(rowKey, colKey, section,
                 details);
 
         WidgetUtil.clearTextSelection();
     }
 
     protected VScrollTableRow getScrollTableRow(Element e) {
         return WidgetUtil.findWidget(e, VScrollTableRow.class);
     }
 
     private int getElementIndex(Element e,
             com.google.gwt.user.client.Element element) {
         int i = 0;
         Element current = element.getFirstChildElement();
         while (!current.isOrHasChild(e)) {
             current = current.getNextSiblingElement();
             ++i;
         }
         return i;
     }
 
     /*
      * (non-Javadoc)
      *
      * @see com.vaadin.client.Paintable#updateFromUIDL(com.vaadin.client.UIDL,
      * com.vaadin.client.ApplicationConnection)
      */
     @Override
     public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
         getWidget().rendering = true;
 
         // If a row has an open context menu, it will be closed as the row is
         // detached. Retain a reference here so we can restore the menu if
         // required.
         ContextMenuDetails contextMenuBeforeUpdate = getWidget().contextMenu;
 
         if (uidl.hasAttribute(TableConstants.ATTRIBUTE_PAGEBUFFER_FIRST)) {
             getWidget().serverCacheFirst = uidl
                     .getIntAttribute(TableConstants.ATTRIBUTE_PAGEBUFFER_FIRST);
             getWidget().serverCacheLast = uidl
                     .getIntAttribute(TableConstants.ATTRIBUTE_PAGEBUFFER_LAST);
         } else {
             getWidget().serverCacheFirst = -1;
             getWidget().serverCacheLast = -1;
         }
         /*
          * We need to do this before updateComponent since updateComponent calls
          * this.setHeight() which will calculate a new body height depending on
          * the space available.
          */
         if (uidl.hasAttribute("colfooters")) {
             getWidget().showColFooters = uidl.getBooleanAttribute("colfooters");
         }
 
         getWidget().tFoot.setVisible(getWidget().showColFooters);
 
         if (!isRealUpdate(uidl)) {
             getWidget().rendering = false;
             return;
         }
 
         getWidget().paintableId = uidl.getStringAttribute("id");
         getWidget().immediate = getState().immediate;
 
         int previousTotalRows = getWidget().totalRows;
         getWidget().updateTotalRows(uidl);
         boolean totalRowsHaveChanged = (getWidget().totalRows != previousTotalRows);
 
         getWidget().updateDragMode(uidl);
 
         // Update child measure hint
         int childMeasureHint = uidl.hasAttribute("measurehint")
                 ? uidl.getIntAttribute("measurehint") : 0;
         getWidget().setChildMeasurementHint(
                 ChildMeasurementHint.values()[childMeasureHint]);
 
         getWidget().updateSelectionProperties(uidl, getState(), isReadOnly());
 
         if (uidl.hasAttribute("alb")) {
             getWidget().bodyActionKeys = uidl.getStringArrayAttribute("alb");
         } else {
             // Need to clear the actions if the action handlers have been
             // removed
             getWidget().bodyActionKeys = null;
         }
 
         getWidget().setCacheRateFromUIDL(uidl);
 
         getWidget().recalcWidths = uidl.hasAttribute("recalcWidths");
         if (getWidget().recalcWidths) {
             getWidget().tHead.clear();
             getWidget().tFoot.clear();
         }
 
         getWidget().updatePageLength(uidl);
 
         getWidget().updateFirstVisibleAndScrollIfNeeded(uidl);
 
         getWidget().showRowHeaders = uidl.getBooleanAttribute("rowheaders");
         getWidget().showColHeaders = uidl.getBooleanAttribute("colheaders");
 
         getWidget().updateSortingProperties(uidl);
 
         getWidget().updateActionMap(uidl);
 
         getWidget().updateColumnProperties(uidl);
 
         UIDL ac = uidl.getChildByTagName("-ac");
         if (ac == null) {
             if (getWidget().dropHandler != null) {
                 // remove dropHandler if not present anymore
                 getWidget().dropHandler = null;
             }
         } else {
             if (getWidget().dropHandler == null) {
                 getWidget().dropHandler = getWidget().new VScrollTableDropHandler();
             }
             getWidget().dropHandler.updateAcceptRules(ac);
         }
 
         UIDL partialRowAdditions = uidl.getChildByTagName("prows");
         UIDL partialRowUpdates = uidl.getChildByTagName("urows");
         if (partialRowUpdates != null || partialRowAdditions != null) {
             getWidget().postponeSanityCheckForLastRendered = true;
             // we may have pending cache row fetch, cancel it. See #2136
             getWidget().rowRequestHandler.cancel();
 
             getWidget().updateRowsInBody(partialRowUpdates);
             getWidget().addAndRemoveRows(partialRowAdditions);
 
             // sanity check (in case the value has slipped beyond the total
             // amount of rows)
             getWidget().scrollBody
                     .setLastRendered(getWidget().scrollBody.getLastRendered());
             getWidget().updateMaxIndent();
         } else {
             getWidget().postponeSanityCheckForLastRendered = false;
             UIDL rowData = uidl.getChildByTagName("rows");
             if (rowData != null) {
                 // we may have pending cache row fetch, cancel it. See #2136
                 getWidget().rowRequestHandler.cancel();
 
                 if (!getWidget().recalcWidths
                         && getWidget().initializedAndAttached) {
                     getWidget().updateBody(rowData,
                             uidl.getIntAttribute("firstrow"),
                             uidl.getIntAttribute("rows"));
                     if (getWidget().headerChangedDuringUpdate) {
                         getWidget().triggerLazyColumnAdjustment(true);
                     }
                 } else {
                     getWidget().initializeRows(uidl, rowData);
                 }
             }
         }
 
         boolean keyboardSelectionOverRowFetchInProgress = getWidget()
                 .selectSelectedRows(uidl);
 
         // If a row had an open context menu before the update, and after the
         // update there's a row with the same key as that row, restore the
         // context menu. See #8526.
         showSavedContextMenu(contextMenuBeforeUpdate);
 
         if (!getWidget().isSelectable()) {
             getWidget().scrollBody.addStyleName(
                     getWidget().getStylePrimaryName() + "-body-noselection");
         } else {
             getWidget().scrollBody.removeStyleName(
                     getWidget().getStylePrimaryName() + "-body-noselection");
         }
 
         getWidget().hideScrollPositionAnnotation();
 
         // selection is no in sync with server, avoid excessive server visits by
         // clearing to flag used during the normal operation
         if (!keyboardSelectionOverRowFetchInProgress) {
             getWidget().selectionChanged = false;
         }
 
         /*
          * This is called when the Home or page up button has been pressed in
          * selectable mode and the next selected row was not yet rendered in the
          * client
          */
         if (getWidget().selectFirstItemInNextRender
                 || getWidget().focusFirstItemInNextRender) {
             getWidget().selectFirstRenderedRowInViewPort(
                     getWidget().focusFirstItemInNextRender);
             getWidget().selectFirstItemInNextRender = getWidget().focusFirstItemInNextRender = false;
         }
 
         /*
          * This is called when the page down or end button has been pressed in
          * selectable mode and the next selected row was not yet rendered in the
          * client
          */
         if (getWidget().selectLastItemInNextRender
                 || getWidget().focusLastItemInNextRender) {
             getWidget().selectLastRenderedRowInViewPort(
                     getWidget().focusLastItemInNextRender);
             getWidget().selectLastItemInNextRender = getWidget().focusLastItemInNextRender = false;
         }
         getWidget().multiselectPending = false;
 
         if (getWidget().focusedRow != null) {
             if (!getWidget().focusedRow.isAttached()
                     && !getWidget().rowRequestHandler
                             .isRequestHandlerRunning()) {
                 // focused row has been orphaned, can't focus
                 if (getWidget().selectedRowKeys
                         .contains(getWidget().focusedRow.getKey())) {
                     // if row cache was refreshed, focused row should be
                     // in selection and exists with same index
                     getWidget().setRowFocus(getWidget().getRenderedRowByKey(
                             getWidget().focusedRow.getKey()));
                 } else if (getWidget().selectedRowKeys.size() > 0) {
                     // try to focus any row in selection
                     getWidget().setRowFocus(getWidget().getRenderedRowByKey(
                             getWidget().selectedRowKeys.iterator().next()));
                 } else {
                     // try to focus any row
                     getWidget().focusRowFromBody();
                 }
             }
         }
 
         /*
          * If the server has (re)initialized the rows, our selectionRangeStart
          * row will point to an index that the server knows nothing about,
          * causing problems if doing multi selection with shift. The field will
          * be cleared a little later when the row focus has been restored.
          * (#8584)
          */
         if (uidl.hasAttribute(TableConstants.ATTRIBUTE_KEY_MAPPER_RESET)
                 && uidl.getBooleanAttribute(
                         TableConstants.ATTRIBUTE_KEY_MAPPER_RESET)
                 && getWidget().selectionRangeStart != null) {
             assert !getWidget().selectionRangeStart.isAttached();
             getWidget().selectionRangeStart = getWidget().focusedRow;
         }
 
         getWidget().tabIndex = getState().tabIndex;
         getWidget().setProperTabIndex();
 
         Scheduler.get().scheduleFinally(new ScheduledCommand() {
 
             @Override
             public void execute() {
                 getWidget().resizeSortedColumnForSortIndicator();
             }
         });
 
         // Remember this to detect situations where overflow hack might be
         // needed during scrolling
         getWidget().lastRenderedHeight = getWidget().scrollBody
                 .getOffsetHeight();
 
         getWidget().rendering = false;
         getWidget().headerChangedDuringUpdate = false;
 
         getWidget().collapsibleMenuContent = getState().collapseMenuContent;
     }
 
     @Override
     public void updateEnabledState(boolean enabledState) {
         super.updateEnabledState(enabledState);
         getWidget().enabled = isEnabled();
 
         // IE8 is no longer supported
     }
 
     @Override
     public VScrollTablePatched getWidget() {
         return (VScrollTablePatched) super.getWidget();
     }
 
     @Override
     public void updateCaption(ComponentConnector component) {
         // NOP, not rendered
     }
 
     @Override
     public void layoutVertically() {
         getWidget().updateHeight();
     }
 
     @Override
     public void layoutHorizontally() {
         getWidget().updateWidth();
     }
 
     @Override
     public void postLayout() {
         VScrollTablePatched table = getWidget();
         if (table.isVisibleInHierarchy() && table.sizeNeedsInit) {
             table.sizeInit();
             Scheduler.get().scheduleFinally(new ScheduledCommand() {
                 @Override
                 public void execute() {
                     // IE8 is no longer supported
                     getLayoutManager().setNeedsMeasure(TableConnectorPatched.this);
                     ServerConnector parent = getParent();
                     if (parent instanceof ComponentConnector) {
                         getLayoutManager()
                                 .setNeedsMeasure((ComponentConnector) parent);
                     }
                     getLayoutManager()
                             .setNeedsVerticalLayout(TableConnectorPatched.this);
                     getLayoutManager().layoutNow();
                 }
             });
         }
     }
 
     @Override
     public boolean isReadOnly() {
         return super.isReadOnly() || getState().propertyReadOnly;
     }
 
     @Override
     public TableState getState() {
         return (TableState) super.getState();
     }
 
     /**
      * Shows a saved row context menu if the row for the context menu is still
      * visible. Does nothing if a context menu has not been saved.
      *
      * @param savedContextMenu
      */
     public void showSavedContextMenu(ContextMenuDetails savedContextMenu) {
         if (isEnabled() && savedContextMenu != null) {
             Iterator<Widget> iterator = getWidget().scrollBody.iterator();
             while (iterator.hasNext()) {
                 Widget w = iterator.next();
                 VScrollTableRow row = (VScrollTableRow) w;
                 if (row.getKey().equals(savedContextMenu.rowKey)) {
                     row.showContextMenu(savedContextMenu.left,
                             savedContextMenu.top);
                 }
             }
         }
     }
 
     @Override
     public TooltipInfo getTooltipInfo(Element element) {
 
         TooltipInfo info = null;
 
         if (element != getWidget().getElement()) {
             Object node = WidgetUtil.findWidget(element, getWidget().scrollBody.iterator().next().getClass());
 
             if (node != null) {
                 VScrollTableRow row = (VScrollTableRow) node;
                 info = row.getTooltip(element);
             }
         }
 
         if (info == null) {
             info = super.getTooltipInfo(element);
         }
 
         return info;
     }
 
     @Override
     public boolean hasTooltip() {
         /*
          * Tooltips for individual rows and cells are not processed until
          * updateFromUIDL, so we can't be sure that there are no tooltips during
          * onStateChange when this method is used.
          */
         return true;
     }
 
     @Override
     public void onConnectorHierarchyChange(
             ConnectorHierarchyChangeEvent connectorHierarchyChangeEvent) {
         // TODO Move code from updateFromUIDL to this method
     }
 
     @Override
     protected void updateComponentSize(String newWidth, String newHeight) {
         super.updateComponentSize(newWidth, newHeight);
 
         if ("".equals(newWidth)) {
             getWidget().updateWidth();
         }
         if ("".equals(newHeight)) {
             getWidget().updateHeight();
         }
     }
 
     @Override
     public List<ComponentConnector> getChildComponents() {
         if (childComponents == null) {
             return Collections.emptyList();
         }
 
         return childComponents;
     }
 
     @Override
     public void setChildComponents(List<ComponentConnector> childComponents) {
         this.childComponents = childComponents;
     }
 
     @Override
     public HandlerRegistration addConnectorHierarchyChangeHandler(
             ConnectorHierarchyChangeHandler handler) {
         return ensureHandlerManager()
                 .addHandler(ConnectorHierarchyChangeEvent.TYPE, handler);
     }
 
     @Override
     public void setChildMeasurementHint(ChildMeasurementHint hint) {
         getWidget().setChildMeasurementHint(hint);
     }
 
     @Override
     public ChildMeasurementHint getChildMeasurementHint() {
         return getWidget().getChildMeasurementHint();
     }
 
 }