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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
|
// 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 "third_party/blink/renderer/core/html/html_frame_owner_element.h"
#include <algorithm>
#include "third_party/blink/renderer/core/exported/web_view_impl.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/testing/sim/sim_compositor.h"
#include "third_party/blink/renderer/core/testing/sim/sim_request.h"
#include "third_party/blink/renderer/core/testing/sim/sim_test.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/testing/runtime_enabled_features_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
namespace {
class LazyLoadFramesTest : public SimTest {
public:
static constexpr int kViewportWidth = 800;
static constexpr int kViewportHeight = 600;
LazyLoadFramesTest() : scoped_lazy_frame_loading_for_test_(true) {}
void SetUp() override {
SimTest::SetUp();
WebView().Resize(WebSize(kViewportWidth, kViewportHeight));
}
private:
ScopedLazyFrameLoadingForTest scoped_lazy_frame_loading_for_test_;
};
TEST_F(LazyLoadFramesTest, SameOriginFrameIsNotDeferred) {
SimRequest main_resource("https://example.com/", "text/html");
SimRequest child_frame_resource("https://example.com/subframe.html",
"text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<body onload='console.log("main body onload");'>
<div style='height: %dpx;'></div>
<iframe src='https://example.com/subframe.html'
style='width: 200px; height: 200px;'
onload='console.log("child frame element onload");'></iframe>
</body>)HTML",
kViewportHeight + HTMLFrameOwnerElement::kLazyLoadRootMarginPx));
child_frame_resource.Complete("");
Compositor().BeginFrame();
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_TRUE(ConsoleMessages().Contains("child frame element onload"));
}
TEST_F(LazyLoadFramesTest, AboveTheFoldFrameIsNotDeferred) {
SimRequest main_resource("https://example.com/", "text/html");
SimRequest child_frame_resource("https://crossorigin.com/subframe.html",
"text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<body onload='console.log("main body onload");'>
<div style='height: %dpx;'></div>
<iframe src='https://crossorigin.com/subframe.html'
style='width: 200px; height: 200px;'
onload='console.log("child frame element onload");'></iframe>
</body>)HTML",
kViewportHeight - 100));
Compositor().BeginFrame();
test::RunPendingTasks();
child_frame_resource.Complete("");
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_TRUE(ConsoleMessages().Contains("child frame element onload"));
}
TEST_F(LazyLoadFramesTest, BelowTheFoldButNearViewportFrameIsNotDeferred) {
SimRequest main_resource("https://example.com/", "text/html");
SimRequest child_frame_resource("https://crossorigin.com/subframe.html",
"text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<body onload='console.log("main body onload");'>
<div style='height: %dpx;'></div>
<iframe src='https://crossorigin.com/subframe.html'
style='width: 200px; height: 200px;'
onload='console.log("child frame element onload");'></iframe>
</body>)HTML",
kViewportHeight + 100));
Compositor().BeginFrame();
test::RunPendingTasks();
child_frame_resource.Complete("");
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_TRUE(ConsoleMessages().Contains("child frame element onload"));
}
TEST_F(LazyLoadFramesTest, HiddenAndTinyFramesAreNotDeferred) {
SimRequest main_resource("https://example.com/", "text/html");
SimRequest display_none_frame_resource(
"https://crossorigin.com/display_none.html", "text/html");
SimRequest tiny_frame_resource("https://crossorigin.com/tiny.html",
"text/html");
SimRequest tiny_width_frame_resource(
"https://crossorigin.com/tiny_width.html", "text/html");
SimRequest tiny_height_frame_resource(
"https://crossorigin.com/tiny_height.html", "text/html");
SimRequest off_screen_left_frame_resource(
"https://crossorigin.com/off_screen_left.html", "text/html");
SimRequest off_screen_top_frame_resource(
"https://crossorigin.com/off_screen_top.html", "text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<head><style>
/* Chrome by default sets borders for iframes, so explicitly specify
* no borders, padding, or margins here so that the dimensions of the
* tiny frames aren't artifically inflated past the dimensions that
* the lazy loading logic considers "tiny". */
iframe { border-style: none; padding: 0px; margin: 0px; }
</style></head>
<body onload='console.log("main body onload");'>
<div style='height: %dpx'></div>
<iframe src='https://crossorigin.com/display_none.html'
style='display: none;'
onload='console.log("display none element onload");'></iframe>
<iframe src='https://crossorigin.com/tiny.html'
style='width: 4px; height: 4px;'
onload='console.log("tiny element onload");'></iframe>
<iframe src='https://crossorigin.com/tiny_width.html'
style='width: 0px; height: 200px;'
onload='console.log("tiny width element onload");'></iframe>
<iframe src='https://crossorigin.com/tiny_height.html'
style='width: 200px; height: 0px;'
onload='console.log("tiny height element onload");'></iframe>
<iframe src='https://crossorigin.com/off_screen_left.html'
style='position:relative;right:9000px;width:200px;height:200px;'
onload='console.log("off screen left element onload");'></iframe>
<iframe src='https://crossorigin.com/off_screen_top.html'
style='position:relative;bottom:9000px;width:200px;height:200px;'
onload='console.log("off screen top element onload");'></iframe>
</body>
)HTML",
kViewportHeight + HTMLFrameOwnerElement::kLazyLoadRootMarginPx + 100));
Compositor().BeginFrame();
test::RunPendingTasks();
display_none_frame_resource.Complete("");
tiny_frame_resource.Complete("");
tiny_width_frame_resource.Complete("");
tiny_height_frame_resource.Complete("");
off_screen_left_frame_resource.Complete("");
off_screen_top_frame_resource.Complete("");
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_TRUE(ConsoleMessages().Contains("display none element onload"));
EXPECT_TRUE(ConsoleMessages().Contains("tiny element onload"));
EXPECT_TRUE(ConsoleMessages().Contains("tiny width element onload"));
EXPECT_TRUE(ConsoleMessages().Contains("tiny height element onload"));
EXPECT_TRUE(ConsoleMessages().Contains("off screen left element onload"));
EXPECT_TRUE(ConsoleMessages().Contains("off screen top element onload"));
}
TEST_F(LazyLoadFramesTest, CrossOriginFrameIsDeferredUntilNearViewport) {
SimRequest main_resource("https://example.com/", "text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<body onload='console.log("main body onload");'>
<div style='height: %dpx;'></div>
<iframe src='https://crossorigin.com/subframe.html'
style='width: 400px; height: 400px;'
onload='console.log("child frame element onload");'></iframe>
</body>)HTML",
kViewportHeight + HTMLFrameOwnerElement::kLazyLoadRootMarginPx + 100));
Compositor().BeginFrame();
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_FALSE(ConsoleMessages().Contains("child frame element onload"));
SimRequest child_frame_resource("https://crossorigin.com/subframe.html",
"text/html");
// Scroll down near the child frame. This should cause the child frame to get
// loaded.
GetDocument().View()->LayoutViewportScrollableArea()->SetScrollOffset(
ScrollOffset(0, kViewportHeight + 150), kProgrammaticScroll);
Compositor().BeginFrame();
test::RunPendingTasks();
SimRequest nested_child_frame_resource("https://test.com/", "text/html");
// There's another nested cross origin iframe inside the first child frame,
// partway down such that it's not near the viewport. It should still be
// loaded immediately, and not deferred, since it's nested inside a frame that
// was previously deferred.
child_frame_resource.Complete(
"<div style='height: 200px;'></div>"
"<iframe src='https://test.com/' style='width: 200px; height: 200px;'>"
"</iframe>");
test::RunPendingTasks();
nested_child_frame_resource.Complete("");
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_TRUE(ConsoleMessages().Contains("child frame element onload"));
}
TEST_F(LazyLoadFramesTest, AboutBlankNavigationIsNotDeferred) {
SimRequest main_resource("https://example.com/", "text/html");
SimRequest child_frame_resource("https://crossorigin.com/subframe.html",
"text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<body onload='BodyOnload()'>
<script>
function BodyOnload() {
console.log('main body onload');
document.getElementsByTagName('iframe')[0].src =
'https://crossorigin.com/subframe.html';
}
</script>
<div style='height: %dpx;'></div>
<iframe
style='width: 200px; height: 200px;'
onload='console.log("child frame element onload");'></iframe>
</body>)HTML",
kViewportHeight + HTMLFrameOwnerElement::kLazyLoadRootMarginPx + 100));
Compositor().BeginFrame();
test::RunPendingTasks();
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_EQ(1, static_cast<int>(std::count(ConsoleMessages().begin(),
ConsoleMessages().end(),
"child frame element onload")));
child_frame_resource.Complete("");
Compositor().BeginFrame();
test::RunPendingTasks();
EXPECT_EQ(2, static_cast<int>(std::count(ConsoleMessages().begin(),
ConsoleMessages().end(),
"child frame element onload")));
}
TEST_F(LazyLoadFramesTest, JavascriptStringUrlIsNotDeferred) {
SimRequest main_resource("https://example.com/", "text/html");
LoadURL("https://example.com/");
main_resource.Complete(String::Format(
R"HTML(
<body onload='console.log("main body onload");'>
<div style='height: %dpx;'></div>
<iframe src='javascript:"Hello World!";'
style='width: 200px; height: 200px;'
onload='console.log("child frame element onload");'></iframe>
</body>)HTML",
kViewportHeight + HTMLFrameOwnerElement::kLazyLoadRootMarginPx + 100));
EXPECT_TRUE(ConsoleMessages().Contains("main body onload"));
EXPECT_TRUE(ConsoleMessages().Contains("child frame element onload"));
}
} // namespace
} // namespace blink
|
