content: /*
   * Copyright (C) 2011 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.layoutlib.bridge.bars;
  
  import com.android.layoutlib.bridge.android.BridgeContext;
  import com.android.resources.Density;
  
  import android.util.DisplayMetrics;
  import android.view.View;
  import android.widget.LinearLayout;
  import android.widget.TextView;
  
  public class NavigationBar extends CustomBar {
  
      /** Navigation bar background color attribute name. */
      private static final String ATTR_COLOR = "navigationBarColor";
      /** Attribute for translucency property. */
      public static final String ATTR_TRANSLUCENT = "windowTranslucentNavigation";
      // These correspond to @dimen/navigation_side_padding in the system ui code.
      private static final int PADDING_WIDTH_DEFAULT = 36;
      private static final int PADDING_WIDTH_SW360 = 40;
      private static final int PADDING_WIDTH_SW400 = 50;
      // These corresponds to @dimen/navigation_key_width in the system ui code.
      private static final int WIDTH_DEFAULT = 36;
      private static final int WIDTH_SW360 = 40;
      private static final int WIDTH_SW600 = 48;
      protected static final String LAYOUT_XML = "navigation_bar.xml";
      private static final String LAYOUT_600DP_XML = "navigation_bar600dp.xml";
  
      public NavigationBar(BridgeContext context, Density density, int orientation, boolean isRtl,
        boolean rtlEnabled, int simulatedPlatformVersion, boolean quickStepEnabled) {
          this(context, density, orientation, isRtl, rtlEnabled, simulatedPlatformVersion,
            getShortestWidth(context)>= 600 ? LAYOUT_600DP_XML : LAYOUT_XML, quickStepEnabled);
      }
  
      protected NavigationBar(BridgeContext context, Density density, int orientation, boolean isRtl,
        boolean rtlEnabled, int simulatedPlatformVersion, String layoutPath, boolean quickStepEnabled) {
          super(context, orientation, layoutPath, simulatedPlatformVersion);
  
          int color = getBarColor(ATTR_COLOR, ATTR_TRANSLUCENT);
          setBackgroundColor(color == 0 ? 0xFF000000 : color);
  
          // Cannot access the inside items through id because no R.id values have been
          // created for them.
          // We do know the order though.
          // 0 is a spacer.
          int back = 1;
          int recent = 5;
          if (orientation == LinearLayout.VERTICAL || (isRtl && !rtlEnabled)) {
              // If RTL is enabled, then layoutlib mirrors the layout for us.
              back = 5;
              recent = 1;
          }
  
          //noinspection SpellCheckingInspection
          loadIcon(back,
                  quickStepEnabled ? "ic_sysbar_back_quick_step.png" : "ic_sysbar_back.png",
                  density, isRtl);
          //noinspection SpellCheckingInspection
          loadIcon(3, quickStepEnabled ? "ic_sysbar_home_quick_step.png" : "ic_sysbar_home.png",
                  density,
                  isRtl);
          if (!quickStepEnabled) {
              //noinspection SpellCheckingInspection
              loadIcon(recent, "ic_sysbar_recent.png", density, isRtl);
          }
          setupNavBar(context, orientation);
      }
  
      private void setupNavBar(BridgeContext context, int orientation) {
          float sw = getShortestWidth(context);
          View leftPadding = getChildAt(0);
          View rightPadding = getChildAt(6);
          setSize(context, leftPadding, orientation, getSidePadding(sw));
          setSize(context, rightPadding, orientation, getSidePadding(sw));
          int navButtonWidth = getWidth(sw);
          for (int i = 1; i < 6; i += 2) {
              View navButton = getChildAt(i);
              setSize(context, navButton, orientation, navButtonWidth);
          }
          if (sw >= 600) {
              setSize(context, getChildAt(2), orientation, 128);
              setSize(context, getChildAt(4), orientation, 128);
          }
      }
  
      private static void setSize(BridgeContext context, View view, int orientation, int size) {
          size *= context.getMetrics().density;
          LayoutParams layoutParams = (LayoutParams) view.getLayoutParams();
          if (orientation == HORIZONTAL) {
              layoutParams.width = size;
          } else {
              layoutParams.height = size;
          }
          view.setLayoutParams(layoutParams);
      }
  
      protected int getSidePadding(float sw) {
          if (sw >= 400) {
              return PADDING_WIDTH_SW400;
          }
          if (sw >= 360) {
              return PADDING_WIDTH_SW360;
          }
          return PADDING_WIDTH_DEFAULT;
      }
  
      private static int getWidth(float sw) {
          if (sw >= 600) {
              return WIDTH_SW600;
          }
          if (sw >= 360) {
              return WIDTH_SW360;
          }
          return WIDTH_DEFAULT;
      }
  
      private static float getShortestWidth(BridgeContext context) {
          DisplayMetrics metrics = context.getMetrics();
          float sw = metrics.widthPixels < metrics.heightPixels ?
                  metrics.widthPixels : metrics.heightPixels;
          sw /= metrics.density;
          return sw;
      }
  
      @Override
      protected TextView getStyleableTextView() {
          return null;
      }
  }
  