1// Copyright 2013 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#include "cc/test/layer_tree_json_parser.h"
6
7#include "base/test/values_test_util.h"
8#include "base/values.h"
9#include "cc/layers/content_layer.h"
10#include "cc/layers/layer.h"
11#include "cc/layers/nine_patch_layer.h"
12#include "cc/layers/picture_layer.h"
13#include "cc/layers/solid_color_layer.h"
14#include "cc/layers/texture_layer.h"
15
16namespace cc {
17
18namespace {
19
20scoped_refptr<Layer> ParseTreeFromValue(base::Value* val,
21                                        ContentLayerClient* content_client) {
22  base::DictionaryValue* dict;
23  bool success = true;
24  success &= val->GetAsDictionary(&dict);
25  std::string layer_type;
26  success &= dict->GetString("LayerType", &layer_type);
27  base::ListValue* list;
28  success &= dict->GetList("Bounds", &list);
29  int width, height;
30  success &= list->GetInteger(0, &width);
31  success &= list->GetInteger(1, &height);
32  success &= dict->GetList("Position", &list);
33  double position_x, position_y;
34  success &= list->GetDouble(0, &position_x);
35  success &= list->GetDouble(1, &position_y);
36
37  bool draws_content;
38  success &= dict->GetBoolean("DrawsContent", &draws_content);
39
40  scoped_refptr<Layer> new_layer;
41  if (layer_type == "SolidColorLayer") {
42    new_layer = SolidColorLayer::Create();
43  } else if (layer_type == "ContentLayer") {
44    new_layer = ContentLayer::Create(content_client);
45  } else if (layer_type == "NinePatchLayer") {
46    success &= dict->GetList("ImageAperture", &list);
47    int aperture_x, aperture_y, aperture_width, aperture_height;
48    success &= list->GetInteger(0, &aperture_x);
49    success &= list->GetInteger(1, &aperture_y);
50    success &= list->GetInteger(2, &aperture_width);
51    success &= list->GetInteger(3, &aperture_height);
52
53    base::ListValue* bounds;
54    success &= dict->GetList("ImageBounds", &bounds);
55    double image_width, image_height;
56    success &= bounds->GetDouble(0, &image_width);
57    success &= bounds->GetDouble(1, &image_height);
58
59    success &= dict->GetList("Border", &list);
60    int border_x, border_y, border_width, border_height;
61    success &= list->GetInteger(0, &border_x);
62    success &= list->GetInteger(1, &border_y);
63    success &= list->GetInteger(2, &border_width);
64    success &= list->GetInteger(3, &border_height);
65
66    bool fill_center;
67    success &= dict->GetBoolean("FillCenter", &fill_center);
68
69    scoped_refptr<NinePatchLayer> nine_patch_layer = NinePatchLayer::Create();
70
71    SkBitmap bitmap;
72    bitmap.allocN32Pixels(image_width, image_height);
73    bitmap.setImmutable();
74    nine_patch_layer->SetBitmap(bitmap);
75    nine_patch_layer->SetAperture(
76        gfx::Rect(aperture_x, aperture_y, aperture_width, aperture_height));
77    nine_patch_layer->SetBorder(
78        gfx::Rect(border_x, border_y, border_width, border_height));
79    nine_patch_layer->SetFillCenter(fill_center);
80
81    new_layer = nine_patch_layer;
82  } else if (layer_type == "TextureLayer") {
83    new_layer = TextureLayer::CreateForMailbox(NULL);
84  } else if (layer_type == "PictureLayer") {
85    new_layer = PictureLayer::Create(content_client);
86  } else {  // Type "Layer" or "unknown"
87    new_layer = Layer::Create();
88  }
89  new_layer->SetPosition(gfx::PointF(position_x, position_y));
90  new_layer->SetBounds(gfx::Size(width, height));
91  new_layer->SetIsDrawable(draws_content);
92
93  double opacity;
94  if (dict->GetDouble("Opacity", &opacity))
95    new_layer->SetOpacity(opacity);
96
97  bool contents_opaque;
98  if (dict->GetBoolean("ContentsOpaque", &contents_opaque))
99    new_layer->SetContentsOpaque(contents_opaque);
100
101  bool scrollable;
102  // TODO(wjmaclean) At some time in the future we may wish to test that a
103  // reconstructed layer tree contains the correct linkage for the scroll
104  // clip layer. This is complicated by the fact that the json output doesn't
105  // (currently) re-construct the tree with the same layer IDs as the original.
106  // But, since a clip layer is always an ancestor of the scrollable layer, we
107  // can just count the number of upwards hops to the clip layer and write that
108  // into the json file (with 0 hops implying no clip layer, i.e. not
109  // scrollable). Reconstructing the tree can then be accomplished by passing
110  // the parent pointer to this function and traversing the same number of
111  // ancestors to determine the pointer to the clip layer. The LayerTreesMatch()
112  // function should then check that both original and reconstructed layers
113  // have the same positioning with respect to their clip layers.
114  //
115  // For now, we can safely indicate a layer is scrollable by giving it a
116  // pointer to itself, something not normally allowed in a working tree.
117  //
118  // https://code.google.com/p/chromium/issues/detail?id=330622
119  //
120  if (dict->GetBoolean("Scrollable", &scrollable))
121    new_layer->SetScrollClipLayerId(scrollable ? new_layer->id()
122                                               : Layer::INVALID_ID);
123
124  bool wheel_handler;
125  if (dict->GetBoolean("WheelHandler", &wheel_handler))
126    new_layer->SetHaveWheelEventHandlers(wheel_handler);
127
128  bool scroll_handler;
129  if (dict->GetBoolean("ScrollHandler", &scroll_handler))
130    new_layer->SetHaveScrollEventHandlers(scroll_handler);
131
132  bool is_3d_sorted;
133  if (dict->GetBoolean("Is3DSorted", &is_3d_sorted)) {
134    // A non-zero context ID will put the layer into a 3D sorting context
135    new_layer->Set3dSortingContextId(is_3d_sorted ? 1 : 0);
136  }
137
138  if (dict->HasKey("TouchRegion")) {
139    success &= dict->GetList("TouchRegion", &list);
140    Region touch_region;
141    for (size_t i = 0; i < list->GetSize(); ) {
142      int rect_x, rect_y, rect_width, rect_height;
143      success &= list->GetInteger(i++, &rect_x);
144      success &= list->GetInteger(i++, &rect_y);
145      success &= list->GetInteger(i++, &rect_width);
146      success &= list->GetInteger(i++, &rect_height);
147      touch_region.Union(gfx::Rect(rect_x, rect_y, rect_width, rect_height));
148    }
149    new_layer->SetTouchEventHandlerRegion(touch_region);
150  }
151
152  success &= dict->GetList("DrawTransform", &list);
153  double transform[16];
154  for (int i = 0; i < 16; ++i)
155    success &= list->GetDouble(i, &transform[i]);
156
157  gfx::Transform layer_transform;
158  layer_transform.matrix().setColMajord(transform);
159  new_layer->SetTransform(layer_transform);
160
161  success &= dict->GetList("Children", &list);
162  for (base::ListValue::const_iterator it = list->begin();
163       it != list->end(); ++it) {
164    new_layer->AddChild(ParseTreeFromValue(*it, content_client));
165  }
166
167  if (!success)
168    return NULL;
169
170  return new_layer;
171}
172
173}  // namespace
174
175scoped_refptr<Layer> ParseTreeFromJson(std::string json,
176                                       ContentLayerClient* content_client) {
177  scoped_ptr<base::Value> val = base::test::ParseJson(json);
178  return ParseTreeFromValue(val.get(), content_client);
179}
180
181}  // namespace cc
182