src/content/public/android/java/src/org/chromium/content/browser/input/SelectPopupDropdown.java

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 package org.chromium.content.browser.input;
   6
   7 import android.content.Context;
   8 import android.graphics.Rect;
   9 import android.view.View;
  10 import android.widget.AdapterView;
  11 import android.widget.PopupWindow;
  12
  13 import org.chromium.content.browser.ContentViewCore;
  14 import org.chromium.content.browser.RenderCoordinates;
  15 import org.chromium.ui.DropdownAdapter;
  16 import org.chromium.ui.DropdownItem;
  17 import org.chromium.ui.DropdownPopupWindow;
  18
  19 import java.util.List;
  20
  21 /**
  22  * Handles the dropdown popup for the <select> HTML tag support.
  23  */
  24 public class SelectPopupDropdown implements SelectPopup {
  25
  26     private final ContentViewCore mContentViewCore;
  27     private final Context mContext;
  28     private final DropdownPopupWindow mDropdownPopupWindow;
  29
  30     private int mInitialSelection = -1;
  31     private boolean mSelectionNotified;
  32
  33     public SelectPopupDropdown(ContentViewCore contentViewCore, List<SelectPopupItem> items,
  34             Rect bounds, int[] selected) {
  35         mContentViewCore = contentViewCore;
  36         mContext = mContentViewCore.getContext();
  37         mDropdownPopupWindow = new DropdownPopupWindow(mContext,
  38                 mContentViewCore.getViewAndroidDelegate());
  39         mDropdownPopupWindow.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  40             @Override
  41             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
  42                 notifySelection(new int[] {position});
  43                 hide();
  44             }
  45         });
  46         if (selected.length > 0) {
  47             mInitialSelection = selected[0];
  48         }
  49         DropdownItem[] dropdownItems = items.toArray(new DropdownItem[items.size()]);
  50         mDropdownPopupWindow.setAdapter(new DropdownAdapter(mContext, dropdownItems, null));
  51         RenderCoordinates renderCoordinates = mContentViewCore.getRenderCoordinates();
  52         float anchorX = renderCoordinates.fromPixToDip(
  53                 renderCoordinates.fromLocalCssToPix(bounds.left));
  54         float anchorY = renderCoordinates.fromPixToDip(
  55                 renderCoordinates.fromLocalCssToPix(bounds.top));
  56         float anchorWidth = renderCoordinates.fromPixToDip(
  57                 renderCoordinates.fromLocalCssToPix(bounds.right)) - anchorX;
  58         float anchorHeight = renderCoordinates.fromPixToDip(
  59                 renderCoordinates.fromLocalCssToPix(bounds.bottom)) - anchorY;
  60         mDropdownPopupWindow.setAnchorRect(anchorX, anchorY, anchorWidth, anchorHeight);
  61         mDropdownPopupWindow.setOnDismissListener(
  62             new PopupWindow.OnDismissListener() {
  63                 @Override
  64                 public void onDismiss() {
  65                     notifySelection(null);
  66                 }
  67             });
  68     }
  69
  70     private void notifySelection(int[] indicies) {
  71         if (mSelectionNotified) return;
  72         mContentViewCore.selectPopupMenuItems(indicies);
  73         mSelectionNotified = true;
  74     }
  75
  76     @Override
  77     public void show() {
  78         mDropdownPopupWindow.show();
  79         if (mInitialSelection >= 0) {
  80             mDropdownPopupWindow.getListView().setSelection(mInitialSelection);
  81         }
  82     }
  83
  84     @Override
  85     public void hide() {
  86         mDropdownPopupWindow.dismiss();
  87         notifySelection(null);
  88     }
  89 }