OLD | NEW |
---|---|
(Empty) | |
1 // Copyright 2017 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 "core/layout/ng/api/ng_offset_mapping_builder.h" | |
6 | |
7 #include "platform/wtf/text/StringBuilder.h" | |
8 | |
9 namespace blink { | |
10 | |
11 NGOffsetMappingBuilder::NGOffsetMappingBuilder() { | |
12 mapping_.push_back(0); | |
13 } | |
14 | |
15 void NGOffsetMappingBuilder::AppendIdentityMapping(unsigned length) { | |
16 DCHECK_GT(length, 0u); | |
yosin_UTC9
2017/06/28 01:44:21
Please add |DCHECK(!mapping_.IsEmpty())| for |mapp
Xiaocheng
2017/06/28 03:34:04
Done.
| |
17 for (unsigned i = 0; i < length; ++i) { | |
18 unsigned next = mapping_.back() + 1; | |
19 mapping_.push_back(next); | |
20 } | |
21 } | |
22 | |
23 void NGOffsetMappingBuilder::AppendCollapsedMapping(unsigned length) { | |
24 DCHECK_GT(length, 0u); | |
25 unsigned back = mapping_.back(); | |
yosin_UTC9
2017/06/28 01:44:21
nit: s/unsigned/const unsigned/
Please add |DCHECK
Xiaocheng
2017/06/28 03:34:05
Done.
| |
26 for (unsigned i = 0; i < length; ++i) | |
27 mapping_.push_back(back); | |
28 } | |
29 | |
30 void NGOffsetMappingBuilder::CollapseTrailingSpace(unsigned skip_length) { | |
31 DCHECK(mapping_.size()); | |
yosin_UTC9
2017/06/28 01:44:21
nit: s/mapping_.size()/!mapping.IsEmpty()/
Xiaocheng
2017/06/28 03:34:05
Done.
| |
32 | |
33 // Find the |skipped_count + 1|-st last uncollapsed character. By collapsing | |
34 // it, all mapping values beyond this position are decremented by 1. | |
35 unsigned skipped_count = 0; | |
36 for (unsigned i = mapping_.size() - 1; skipped_count <= skip_length; --i) { | |
37 DCHECK_GT(i, 0u); | |
38 if (mapping_[i] != mapping_[i - 1]) | |
39 ++skipped_count; | |
40 --mapping_[i]; | |
41 } | |
42 } | |
43 | |
44 Vector<unsigned> NGOffsetMappingBuilder::DumpOffsetMappingForTesting() const { | |
45 return mapping_; | |
46 } | |
47 | |
48 } // namespace blink | |
OLD | NEW |