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
|
// Copyright 2019 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 "pdf/document_layout.h"
#include "base/logging.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/size.h"
#include "ppapi/cpp/var.h"
#include "ppapi/cpp/var_dictionary.h"
#include <algorithm>
namespace chrome_pdf {
namespace {
constexpr char kDefaultPageOrientation[] = "defaultPageOrientation";
int GetWidestPageWidth(const std::vector<pp::Size>& page_sizes) {
int widest_page_width = 0;
for (const auto& page_size : page_sizes) {
widest_page_width = std::max(widest_page_width, page_size.width());
}
return widest_page_width;
}
pp::Rect InsetRect(pp::Rect rect,
const draw_utils::PageInsetSizes& inset_sizes) {
rect.Inset(inset_sizes.left, inset_sizes.top, inset_sizes.right,
inset_sizes.bottom);
return rect;
}
} // namespace
const draw_utils::PageInsetSizes DocumentLayout::kSingleViewInsets{
/*left=*/5, /*top=*/3, /*right=*/5, /*bottom=*/7};
DocumentLayout::Options::Options() = default;
DocumentLayout::Options::Options(const Options& other) = default;
DocumentLayout::Options& DocumentLayout::Options::operator=(
const Options& other) = default;
DocumentLayout::Options::~Options() = default;
pp::Var DocumentLayout::Options::ToVar() const {
pp::VarDictionary dictionary;
dictionary.Set(kDefaultPageOrientation,
static_cast<int32_t>(default_page_orientation_));
return dictionary;
}
void DocumentLayout::Options::FromVar(const pp::Var& var) {
pp::VarDictionary dictionary(var);
int32_t default_page_orientation =
dictionary.Get(kDefaultPageOrientation).AsInt();
DCHECK_GE(default_page_orientation,
static_cast<int32_t>(PageOrientation::kOriginal));
DCHECK_LE(default_page_orientation,
static_cast<int32_t>(PageOrientation::kLast));
default_page_orientation_ =
static_cast<PageOrientation>(default_page_orientation);
}
void DocumentLayout::Options::RotatePagesClockwise() {
default_page_orientation_ = RotateClockwise(default_page_orientation_);
}
void DocumentLayout::Options::RotatePagesCounterclockwise() {
default_page_orientation_ = RotateCounterclockwise(default_page_orientation_);
}
DocumentLayout::DocumentLayout() = default;
DocumentLayout::~DocumentLayout() = default;
void DocumentLayout::SetOptions(const Options& options) {
// TODO(kmoon): This is pessimistic, but we still want to consider the layout
// dirty for orientation changes, even if the page rects don't change.
//
// We also probably don't want orientation changes to actually kick in until
// the next call to ComputeLayout(). (In practice, we'll call ComputeLayout()
// shortly after calling SetOptions().)
if (options_.default_page_orientation() !=
options.default_page_orientation()) {
dirty_ = true;
}
options_ = options;
}
void DocumentLayout::ComputeSingleViewLayout(
const std::vector<pp::Size>& page_sizes) {
pp::Size document_size(GetWidestPageWidth(page_sizes), 0);
if (page_layouts_.size() != page_sizes.size()) {
// TODO(kmoon): May want to do less work when shrinking a layout.
page_layouts_.resize(page_sizes.size());
dirty_ = true;
}
for (size_t i = 0; i < page_sizes.size(); ++i) {
if (i != 0) {
// Add space for bottom separator.
document_size.Enlarge(0, kBottomSeparator);
}
const pp::Size& page_size = page_sizes[i];
pp::Rect page_rect =
draw_utils::GetRectForSingleView(page_size, document_size);
CopyRectIfModified(page_rect, &page_layouts_[i].outer_rect);
CopyRectIfModified(InsetRect(page_rect, kSingleViewInsets),
&page_layouts_[i].inner_rect);
draw_utils::ExpandDocumentSize(page_size, &document_size);
}
if (size_ != document_size) {
size_ = document_size;
dirty_ = true;
}
}
void DocumentLayout::ComputeTwoUpViewLayout(
const std::vector<pp::Size>& page_sizes) {
pp::Size document_size(GetWidestPageWidth(page_sizes), 0);
if (page_layouts_.size() != page_sizes.size()) {
// TODO(kmoon): May want to do less work when shrinking a layout.
page_layouts_.resize(page_sizes.size());
dirty_ = true;
}
for (size_t i = 0; i < page_sizes.size(); ++i) {
draw_utils::PageInsetSizes page_insets =
draw_utils::GetPageInsetsForTwoUpView(
i, page_sizes.size(), kSingleViewInsets, kHorizontalSeparator);
const pp::Size& page_size = page_sizes[i];
pp::Rect page_rect;
if (i % 2 == 0) {
page_rect = draw_utils::GetLeftRectForTwoUpView(
page_size, {document_size.width(), document_size.height()});
} else {
page_rect = draw_utils::GetRightRectForTwoUpView(
page_size, {document_size.width(), document_size.height()});
document_size.Enlarge(
0, std::max(page_size.height(), page_sizes[i - 1].height()));
}
CopyRectIfModified(page_rect, &page_layouts_[i].outer_rect);
CopyRectIfModified(InsetRect(page_rect, page_insets),
&page_layouts_[i].inner_rect);
}
if (page_sizes.size() % 2 == 1) {
document_size.Enlarge(0, page_sizes.back().height());
}
document_size.set_width(2 * document_size.width());
if (size_ != document_size) {
size_ = document_size;
dirty_ = true;
}
}
void DocumentLayout::CopyRectIfModified(const pp::Rect& source_rect,
pp::Rect* destination_rect) {
if (*destination_rect != source_rect) {
*destination_rect = source_rect;
dirty_ = true;
}
}
} // namespace chrome_pdf
|
