content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * 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.android.tools.idea.editors.theme.widgets;
  
  import com.android.ide.common.rendering.api.LayoutLog;
  import com.android.layoutlib.bridge.Bridge;
  
  import android.content.Context;
  import android.graphics.Canvas;
  import android.util.AttributeSet;
  import android.view.View;
  import android.view.ViewGroup;
  
  /**
   * {@link ViewGroup} that wraps another view and catches any possible exceptions that the child view
   * might generate.
   * This is used by the theme editor to stop custom views from breaking the preview.
   */
  // TODO: This view is just a temporary solution that will be replaced by adding a try / catch
  // for custom views in the ClassConverter
  public class ErrorCatcher extends ViewGroup {
      public ErrorCatcher(Context context) {
          super(context);
      }
  
      public ErrorCatcher(Context context, AttributeSet attrs) {
          super(context, attrs);
      }
  
      public ErrorCatcher(Context context, AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
      }
  
      public ErrorCatcher(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
          super(context, attrs, defStyleAttr, defStyleRes);
      }
  
      @Override
      protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          assert getChildCount() == 1 : "ErrorCatcher can only have one child";
  
          View child = getChildAt(0);
          try {
              measureChild(child, widthMeasureSpec, heightMeasureSpec);
  
              setMeasuredDimension(resolveSize(child.getMeasuredWidth(), widthMeasureSpec),
                      resolveSize(child.getMeasuredHeight(), heightMeasureSpec));
          } catch (Throwable t) {
              Bridge.getLog().warning(LayoutLog.TAG_BROKEN, "Failed to do onMeasure for view " +
                      child.getClass().getCanonicalName(), t);
              setMeasuredDimension(resolveSize(0, widthMeasureSpec),
                      resolveSize(0, heightMeasureSpec));
          }
      }
  
      @Override
      protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
          try {
              return super.drawChild(canvas, child, drawingTime);
          } catch (Throwable t) {
              Bridge.getLog().warning(LayoutLog.TAG_BROKEN, "Failed to draw for view " +
                      child.getClass().getCanonicalName(), t);
          }
  
          return false;
      }
  
      @Override
      protected void onLayout(boolean changed, int l, int t, int r, int b) {
          assert getChildCount() == 1 : "ErrorCatcher can only have one child";
  
          View child = getChildAt(0);
          try {
              child.layout(0, 0, child.getMeasuredWidth(), child.getMeasuredHeight());
          } catch (Throwable e) {
              Bridge.getLog().warning(LayoutLog.TAG_BROKEN, "Failed to do onLayout for view " +
                      child.getClass().getCanonicalName(), e);
          }
      }
  }
  