1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/ui_devtools/dom_agent.h"
#include <memory>
#include "components/ui_devtools/devtools_server.h"
#include "components/ui_devtools/root_element.h"
#include "components/ui_devtools/ui_element.h"
namespace ui_devtools {
using namespace ui_devtools::protocol;
DOMAgent::DOMAgent() {}
DOMAgent::~DOMAgent() {
Reset();
}
Response DOMAgent::disable() {
Reset();
return Response::OK();
}
Response DOMAgent::getDocument(std::unique_ptr<DOM::Node>* out_root) {
*out_root = BuildInitialTree();
return Response::OK();
}
Response DOMAgent::hideHighlight() {
return Response::OK();
}
Response DOMAgent::pushNodesByBackendIdsToFrontend(
std::unique_ptr<protocol::Array<int>> backend_node_ids,
std::unique_ptr<protocol::Array<int>>* result) {
*result = protocol::Array<int>::create();
for (size_t index = 0; index < backend_node_ids->length(); ++index)
(*result)->addItem(backend_node_ids->get(index));
return Response::OK();
}
void DOMAgent::OnUIElementAdded(UIElement* parent, UIElement* child) {
// When parent is null, only need to update |node_id_to_ui_element_|.
if (!parent) {
node_id_to_ui_element_[child->node_id()] = child;
return;
}
// If tree is being built, don't add child to dom tree again.
if (is_building_tree_)
return;
DCHECK(node_id_to_ui_element_.count(parent->node_id()));
const auto& children = parent->children();
auto iter = std::find(children.begin(), children.end(), child);
int prev_node_id =
(iter == children.end() - 1) ? 0 : (*std::next(iter))->node_id();
frontend()->childNodeInserted(parent->node_id(), prev_node_id,
BuildTreeForUIElement(child));
}
void DOMAgent::OnUIElementReordered(UIElement* parent, UIElement* child) {
DCHECK(node_id_to_ui_element_.count(parent->node_id()));
const auto& children = parent->children();
auto iter = std::find(children.begin(), children.end(), child);
int prev_node_id =
(iter == children.begin()) ? 0 : (*std::prev(iter))->node_id();
RemoveDomNode(child);
frontend()->childNodeInserted(parent->node_id(), prev_node_id,
BuildDomNodeFromUIElement(child));
}
void DOMAgent::OnUIElementRemoved(UIElement* ui_element) {
DCHECK(node_id_to_ui_element_.count(ui_element->node_id()));
RemoveDomNode(ui_element);
node_id_to_ui_element_.erase(ui_element->node_id());
}
void DOMAgent::OnUIElementBoundsChanged(UIElement* ui_element) {
for (auto& observer : observers_)
observer.OnElementBoundsChanged(ui_element);
}
void DOMAgent::AddObserver(DOMAgentObserver* observer) {
observers_.AddObserver(observer);
}
void DOMAgent::RemoveObserver(DOMAgentObserver* observer) {
observers_.RemoveObserver(observer);
}
UIElement* DOMAgent::GetElementFromNodeId(int node_id) const {
auto it = node_id_to_ui_element_.find(node_id);
if (it != node_id_to_ui_element_.end())
return it->second;
return nullptr;
}
int DOMAgent::GetParentIdOfNodeId(int node_id) const {
DCHECK(node_id_to_ui_element_.count(node_id));
const UIElement* element = node_id_to_ui_element_.at(node_id);
if (element->parent() && element->parent() != element_root_.get())
return element->parent()->node_id();
return 0;
}
// TODO(mhashmi): Make ids reusable
std::unique_ptr<DOM::Node> DOMAgent::BuildNode(
const std::string& name,
std::unique_ptr<Array<std::string>> attributes,
std::unique_ptr<Array<DOM::Node>> children,
int node_ids) {
constexpr int kDomElementNodeType = 1;
std::unique_ptr<DOM::Node> node = DOM::Node::create()
.setNodeId(node_ids)
.setBackendNodeId(node_ids)
.setNodeName(name)
.setNodeType(kDomElementNodeType)
.setAttributes(std::move(attributes))
.build();
node->setChildNodeCount(static_cast<int>(children->length()));
node->setChildren(std::move(children));
return node;
}
std::unique_ptr<DOM::Node> DOMAgent::BuildDomNodeFromUIElement(
UIElement* root) {
std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
for (auto* it : root->children())
children->addItem(BuildDomNodeFromUIElement(it));
return BuildNode(root->GetTypeName(), root->GetAttributes(),
std::move(children), root->node_id());
}
std::unique_ptr<DOM::Node> DOMAgent::BuildInitialTree() {
is_building_tree_ = true;
std::unique_ptr<Array<DOM::Node>> children = Array<DOM::Node>::create();
element_root_ = std::make_unique<RootElement>(this);
for (auto* child : CreateChildrenForRoot()) {
children->addItem(BuildTreeForUIElement(child));
element_root_->AddChild(child);
}
std::unique_ptr<DOM::Node> root_node =
BuildNode("root", nullptr, std::move(children), element_root_->node_id());
is_building_tree_ = false;
return root_node;
}
void DOMAgent::OnElementBoundsChanged(UIElement* ui_element) {
for (auto& observer : observers_)
observer.OnElementBoundsChanged(ui_element);
}
void DOMAgent::RemoveDomNode(UIElement* ui_element) {
for (auto* child_element : ui_element->children())
RemoveDomNode(child_element);
frontend()->childNodeRemoved(ui_element->parent()->node_id(),
ui_element->node_id());
}
void DOMAgent::Reset() {
is_building_tree_ = false;
element_root_.reset();
node_id_to_ui_element_.clear();
observers_.Clear();
}
} // namespace ui_devtools
|
