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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Eclipse Public License, Version 1.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.eclipse.org/org/documents/epl-v10.php
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.ide.common.layout;
     17 
     18 import static com.android.SdkConstants.FQCN_TABLE_LAYOUT;
     19 
     20 import com.android.annotations.NonNull;
     21 import com.android.annotations.Nullable;
     22 import com.android.ide.common.api.DropFeedback;
     23 import com.android.ide.common.api.INode;
     24 import com.android.ide.common.api.IViewRule;
     25 import com.android.ide.common.api.InsertType;
     26 import com.android.ide.common.api.RuleAction;
     27 import com.android.ide.common.api.SegmentType;
     28 
     29 import java.util.List;
     30 
     31 /**
     32  * An {@link IViewRule} for android.widget.TableRow.
     33  */
     34 public class TableRowRule extends LinearLayoutRule {
     35     @Override
     36     protected boolean isVertical(INode node) {
     37         return false;
     38     }
     39 
     40     @Override
     41     protected boolean supportsOrientation() {
     42         return false;
     43     }
     44 
     45     @Override
     46     public void onChildInserted(@NonNull INode child, @NonNull INode parent,
     47             @NonNull InsertType insertType) {
     48         // Overridden to inhibit the setting of layout_width/layout_height since
     49         // the table row will enforce match_parent and wrap_content for width and height
     50         // respectively.
     51     }
     52 
     53     @Override
     54     public void addLayoutActions(
     55             @NonNull List<RuleAction> actions,
     56             final @NonNull INode parentNode,
     57             final @NonNull List<? extends INode> children) {
     58         super.addLayoutActions(actions, parentNode, children);
     59 
     60         // Also apply table-specific actions on the table row such that you can
     61         // select something in a table row and still get offered actions on the surrounding
     62         // table.
     63         if (children != null) {
     64             INode grandParent = parentNode.getParent();
     65             if (grandParent != null && grandParent.getFqcn().equals(FQCN_TABLE_LAYOUT)) {
     66                 TableLayoutRule.addTableLayoutActions(mRulesEngine, actions, grandParent,
     67                         children);
     68             }
     69         }
     70     }
     71 
     72     @Override
     73     public DropFeedback onResizeBegin(@NonNull INode child, @NonNull INode parent,
     74             @Nullable SegmentType horizontalEdge, @Nullable SegmentType verticalEdge,
     75             @Nullable Object childView, @Nullable Object parentView) {
     76         // No resizing in TableRows; the width is *always* match_parent and the height is
     77         // *always* wrap_content.
     78         return null;
     79     }
     80 }
     81