1 // Copyright 2018 The PDFium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/fxcrt/css/cfx_cssdata.h"
8
9 #include <algorithm>
10 #include <utility>
11
12 #include "core/fxcrt/check_op.h"
13 #include "core/fxcrt/compiler_specific.h"
14 #include "core/fxcrt/css/cfx_cssstyleselector.h"
15 #include "core/fxcrt/css/cfx_cssvaluelistparser.h"
16 #include "core/fxcrt/fx_codepage.h"
17 #include "core/fxcrt/fx_extension.h"
18
19 namespace {
20
21 #undef CSS_PROP____
22 #define CSS_PROP____(a, b, c, d) {CFX_CSSProperty::a, c, d},
23 const CFX_CSSData::Property kPropertyTable[] = {
24 #include "core/fxcrt/css/properties.inc"
25 };
26 #undef CSS_PROP____
27
28 #undef CSS_PROP_VALUE____
29 #define CSS_PROP_VALUE____(a, b, c) {CFX_CSSPropertyValue::a, c},
30 const CFX_CSSData::PropertyValue kPropertyValueTable[] = {
31 #include "core/fxcrt/css/property_values.inc"
32 };
33 #undef CSS_PROP_VALUE____
34
35 const CFX_CSSData::LengthUnit kLengthUnitTable[] = {
36 {"cm", CFX_CSSNumber::Unit::kCentiMeters},
37 {"em", CFX_CSSNumber::Unit::kEMS},
38 {"ex", CFX_CSSNumber::Unit::kEXS},
39 {"in", CFX_CSSNumber::Unit::kInches},
40 {"mm", CFX_CSSNumber::Unit::kMilliMeters},
41 {"pc", CFX_CSSNumber::Unit::kPicas},
42 {"pt", CFX_CSSNumber::Unit::kPoints},
43 {"px", CFX_CSSNumber::Unit::kPixels},
44 };
45
46 // 16 colours from CSS 2.0 + alternate spelling of grey/gray.
47 const CFX_CSSData::Color kColorTable[] = {
48 {"aqua", 0xff00ffff}, {"black", 0xff000000}, {"blue", 0xff0000ff},
49 {"fuchsia", 0xffff00ff}, {"gray", 0xff808080}, {"green", 0xff008000},
50 {"grey", 0xff808080}, {"lime", 0xff00ff00}, {"maroon", 0xff800000},
51 {"navy", 0xff000080}, {"olive", 0xff808000}, {"orange", 0xffffa500},
52 {"purple", 0xff800080}, {"red", 0xffff0000}, {"silver", 0xffc0c0c0},
53 {"teal", 0xff008080}, {"white", 0xffffffff}, {"yellow", 0xffffff00},
54 };
55
56 } // namespace
57
GetPropertyByName(WideStringView name)58 const CFX_CSSData::Property* CFX_CSSData::GetPropertyByName(
59 WideStringView name) {
60 if (name.IsEmpty())
61 return nullptr;
62
63 uint32_t hash = FX_HashCode_GetLoweredW(name);
64 auto* result = std::lower_bound(
65 std::begin(kPropertyTable), std::end(kPropertyTable), hash,
66 [](const CFX_CSSData::Property& iter, const uint32_t& hash) {
67 return iter.dwHash < hash;
68 });
69
70 if (result != std::end(kPropertyTable) && result->dwHash == hash) {
71 return result;
72 }
73 return nullptr;
74 }
75
GetPropertyByEnum(CFX_CSSProperty property)76 const CFX_CSSData::Property* CFX_CSSData::GetPropertyByEnum(
77 CFX_CSSProperty property) {
78 auto index = static_cast<size_t>(property);
79 CHECK_LT(index, std::size(kPropertyTable));
80 // SAFETY: CHECK() on previous line ensures index is in bounds.
81 return UNSAFE_BUFFERS(&kPropertyTable[index]);
82 }
83
GetPropertyValueByName(WideStringView wsName)84 const CFX_CSSData::PropertyValue* CFX_CSSData::GetPropertyValueByName(
85 WideStringView wsName) {
86 if (wsName.IsEmpty())
87 return nullptr;
88
89 uint32_t hash = FX_HashCode_GetLoweredW(wsName);
90 auto* result = std::lower_bound(
91 std::begin(kPropertyValueTable), std::end(kPropertyValueTable), hash,
92 [](const PropertyValue& iter, const uint32_t& hash) {
93 return iter.dwHash < hash;
94 });
95
96 if (result != std::end(kPropertyValueTable) && result->dwHash == hash) {
97 return result;
98 }
99 return nullptr;
100 }
101
GetLengthUnitByName(WideStringView wsName)102 const CFX_CSSData::LengthUnit* CFX_CSSData::GetLengthUnitByName(
103 WideStringView wsName) {
104 if (wsName.IsEmpty() || wsName.GetLength() != 2) {
105 return nullptr;
106 }
107 auto* iter =
108 std::find_if(std::begin(kLengthUnitTable), std::end(kLengthUnitTable),
109 [wsName](const CFX_CSSData::LengthUnit& unit) {
110 return wsName.EqualsASCIINoCase(unit.value);
111 });
112 return iter != std::end(kLengthUnitTable) ? iter : nullptr;
113 }
114
GetColorByName(WideStringView wsName)115 const CFX_CSSData::Color* CFX_CSSData::GetColorByName(WideStringView wsName) {
116 if (wsName.IsEmpty()) {
117 return nullptr;
118 }
119 auto* iter = std::find_if(std::begin(kColorTable), std::end(kColorTable),
120 [wsName](const CFX_CSSData::Color& color) {
121 return wsName.EqualsASCIINoCase(color.name);
122 });
123 return iter != std::end(kColorTable) ? iter : nullptr;
124 }
125