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 #include "mojo/examples/html_viewer/html_document_view.h"
6
7 #include "base/bind.h"
8 #include "base/location.h"
9 #include "base/single_thread_task_runner.h"
10 #include "base/thread_task_runner_handle.h"
11 #include "mojo/services/public/cpp/view_manager/node.h"
12 #include "mojo/services/public/cpp/view_manager/view.h"
13 #include "skia/ext/refptr.h"
14 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
15 #include "third_party/WebKit/public/web/WebDocument.h"
16 #include "third_party/WebKit/public/web/WebElement.h"
17 #include "third_party/WebKit/public/web/WebLocalFrame.h"
18 #include "third_party/WebKit/public/web/WebScriptSource.h"
19 #include "third_party/WebKit/public/web/WebSettings.h"
20 #include "third_party/WebKit/public/web/WebView.h"
21 #include "third_party/skia/include/core/SkCanvas.h"
22 #include "third_party/skia/include/core/SkColor.h"
23 #include "third_party/skia/include/core/SkDevice.h"
24
25 namespace mojo {
26 namespace examples {
27 namespace {
28
CopyToWebData(DataPipeConsumerHandle handle)29 blink::WebData CopyToWebData(DataPipeConsumerHandle handle) {
30 std::vector<char> data;
31 for (;;) {
32 char buf[4096];
33 uint32_t num_bytes = sizeof(buf);
34 MojoResult result = ReadDataRaw(
35 handle,
36 buf,
37 &num_bytes,
38 MOJO_READ_DATA_FLAG_NONE);
39 if (result == MOJO_RESULT_SHOULD_WAIT) {
40 Wait(handle,
41 MOJO_HANDLE_SIGNAL_READABLE,
42 MOJO_DEADLINE_INDEFINITE);
43 } else if (result == MOJO_RESULT_OK) {
44 data.insert(data.end(), buf, buf + num_bytes);
45 } else {
46 break;
47 }
48 }
49 return blink::WebData(data);
50 }
51
ConfigureSettings(blink::WebSettings * settings)52 void ConfigureSettings(blink::WebSettings* settings) {
53 settings->setAcceleratedCompositingEnabled(false);
54 settings->setLoadsImagesAutomatically(true);
55 settings->setJavaScriptEnabled(true);
56 }
57
58 } // namespace
59
HTMLDocumentView(view_manager::ViewManager * view_manager)60 HTMLDocumentView::HTMLDocumentView(view_manager::ViewManager* view_manager)
61 : view_manager_(view_manager),
62 view_(view_manager::View::Create(view_manager_)),
63 web_view_(NULL),
64 repaint_pending_(false),
65 weak_factory_(this) {
66 }
67
~HTMLDocumentView()68 HTMLDocumentView::~HTMLDocumentView() {
69 if (web_view_)
70 web_view_->close();
71 }
72
AttachToNode(view_manager::Node * node)73 void HTMLDocumentView::AttachToNode(view_manager::Node* node) {
74 node->SetActiveView(view_);
75 view_->SetColor(SK_ColorCYAN); // Dummy background color.
76
77 web_view_ = blink::WebView::create(this);
78 ConfigureSettings(web_view_->settings());
79 web_view_->setMainFrame(blink::WebLocalFrame::create(this));
80
81 // TODO(darin): Track size of view_manager::Node.
82 web_view_->resize(gfx::Size(800, 600));
83 }
84
Load(URLResponsePtr response,ScopedDataPipeConsumerHandle response_body_stream)85 void HTMLDocumentView::Load(URLResponsePtr response,
86 ScopedDataPipeConsumerHandle response_body_stream) {
87 DCHECK(web_view_);
88
89 // TODO(darin): A better solution would be to use loadRequest, but intercept
90 // the network request and connect it to the response we already have.
91 blink::WebData data = CopyToWebData(response_body_stream.get());
92 web_view_->mainFrame()->loadHTMLString(
93 data, GURL(response->url), GURL(response->url));
94 }
95
didInvalidateRect(const blink::WebRect & rect)96 void HTMLDocumentView::didInvalidateRect(const blink::WebRect& rect) {
97 if (!repaint_pending_) {
98 repaint_pending_ = true;
99 base::ThreadTaskRunnerHandle::Get()->PostTask(
100 FROM_HERE,
101 base::Bind(&HTMLDocumentView::Repaint, weak_factory_.GetWeakPtr()));
102 }
103 }
104
allowsBrokenNullLayerTreeView() const105 bool HTMLDocumentView::allowsBrokenNullLayerTreeView() const {
106 // TODO(darin): Switch to using compositor bindings.
107 //
108 // NOTE: Note to Blink maintainers, feel free to just break this code if it
109 // is the last using compositor bindings and you want to delete the old path.
110 //
111 return true;
112 }
113
didAddMessageToConsole(const blink::WebConsoleMessage & message,const blink::WebString & source_name,unsigned source_line,const blink::WebString & stack_trace)114 void HTMLDocumentView::didAddMessageToConsole(
115 const blink::WebConsoleMessage& message,
116 const blink::WebString& source_name,
117 unsigned source_line,
118 const blink::WebString& stack_trace) {
119 printf("### console: %s\n", std::string(message.text.utf8()).c_str());
120 }
121
Repaint()122 void HTMLDocumentView::Repaint() {
123 repaint_pending_ = false;
124
125 web_view_->animate(0.0);
126 web_view_->layout();
127
128 int width = web_view_->size().width;
129 int height = web_view_->size().height;
130
131 skia::RefPtr<SkCanvas> canvas = skia::AdoptRef(SkCanvas::NewRaster(
132 SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType)));
133
134 web_view_->paint(canvas.get(), gfx::Rect(0, 0, width, height));
135
136 view_->SetContents(canvas->getDevice()->accessBitmap(false));
137 }
138
139 } // namespace examples
140 } // namespace mojo
141