1 /*
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29 */
30
31 #include "config.h"
32
33 #include <gtest/gtest.h>
34
35 #include "platform/fonts/win/UniscribeHelper.h"
36 #include "wtf/text/WTFString.h"
37
38 using namespace WebCore;
39
40 namespace {
41
42 class UniscribeTest : public testing::Test {
43 public:
UniscribeTest()44 UniscribeTest()
45 {
46 }
47
48 // Returns an HFONT with the given name. The caller does not have to free
49 // this, it will be automatically freed at the end of the test. Returns 0
50 // on failure. On success, the
MakeFont(const wchar_t * fontName,SCRIPT_CACHE ** cache)51 HFONT MakeFont(const wchar_t* fontName, SCRIPT_CACHE** cache)
52 {
53 LOGFONT lf;
54 memset(&lf, 0, sizeof(LOGFONT));
55 lf.lfHeight = 20;
56 wcscpy_s(lf.lfFaceName, fontName);
57
58 HFONT hfont = CreateFontIndirect(&lf);
59 if (!hfont)
60 return 0;
61
62 *cache = new SCRIPT_CACHE;
63 **cache = 0;
64 createdFonts.append(std::make_pair(hfont, *cache));
65 return hfont;
66 }
67
68 protected:
69 // Default font properties structure for tests to use.
70 SCRIPT_FONTPROPERTIES properties;
71
72 private:
SetUp()73 virtual void SetUp()
74 {
75 memset(&properties, 0, sizeof(SCRIPT_FONTPROPERTIES));
76 properties.cBytes = sizeof(SCRIPT_FONTPROPERTIES);
77 properties.wgBlank = ' ';
78 properties.wgDefault = '?'; // Used when the char is not in the font.
79 properties.wgInvalid = '#'; // Used for invalid characters.
80 }
81
TearDown()82 virtual void TearDown()
83 {
84 // Free any allocated fonts.
85 for (size_t i = 0; i < createdFonts.size(); i++) {
86 DeleteObject(createdFonts[i].first);
87 ScriptFreeCache(createdFonts[i].second);
88 delete createdFonts[i].second;
89 }
90 createdFonts.clear();
91 }
92
93 // Tracks allocated fonts so we can delete them at the end of the test.
94 // The script cache pointer is heap allocated and must be freed.
95 Vector< std::pair<HFONT, SCRIPT_CACHE*> > createdFonts;
96 };
97
98 } // namespace
99
100 // This test tests giving Uniscribe a very large buffer, which will cause a
101 // failure.
TEST_F(UniscribeTest,TooBig)102 TEST_F(UniscribeTest, TooBig)
103 {
104 // Make a large string with an e with a zillion combining accents.
105 String input(L"e");
106 for (int i = 0; i < 100000; i++)
107 input.append(static_cast<UChar>(0x301)); // Combining acute accent.
108
109 SCRIPT_CACHE* scriptCache;
110 HFONT hfont = MakeFont(L"Times New Roman", &scriptCache);
111 ASSERT_TRUE(hfont);
112
113 // Test a long string without the normal length protection we have. This
114 // will cause shaping to fail.
115 {
116 Vector<UChar> inputCharacters;
117 input.appendTo(inputCharacters);
118 UniscribeHelper uniscribe(
119 inputCharacters.data(), static_cast<int>(inputCharacters.size()),
120 false, hfont, scriptCache, &properties, 0);
121 uniscribe.initWithOptionalLengthProtection(false);
122
123 // There should be one shaping entry, with nothing in it.
124 ASSERT_EQ(1, uniscribe.m_shapes.size());
125 EXPECT_EQ(0, uniscribe.m_shapes[0].m_glyphs.size());
126 EXPECT_EQ(0, uniscribe.m_shapes[0].m_logs.size());
127 EXPECT_EQ(0, uniscribe.m_shapes[0].m_visualAttributes.size());
128 EXPECT_EQ(0, uniscribe.m_shapes[0].m_advance.size());
129 EXPECT_EQ(0, uniscribe.m_shapes[0].m_offsets.size());
130 EXPECT_EQ(0, uniscribe.m_shapes[0].m_justify.size());
131 EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcA);
132 EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcB);
133 EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcC);
134
135 // The sizes of the other stuff should match the shaping entry.
136 EXPECT_EQ(1, uniscribe.m_runs.size());
137 EXPECT_EQ(1, uniscribe.m_screenOrder.size());
138
139 // Check that the various querying functions handle the empty case
140 // properly.
141 EXPECT_EQ(0, uniscribe.width());
142 EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(0));
143 EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(1000));
144 EXPECT_EQ(0, uniscribe.xToCharacter(0));
145 EXPECT_EQ(0, uniscribe.xToCharacter(1000));
146 }
147
148 // Now test the very large string and make sure it is handled properly by
149 // the length protection.
150 {
151 Vector<UChar> inputCharacters;
152 input.appendTo(inputCharacters);
153 UniscribeHelper uniscribe(
154 inputCharacters.data(), static_cast<int>(inputCharacters.size()),
155 false, hfont, scriptCache, &properties, 0);
156 uniscribe.initWithOptionalLengthProtection(true);
157
158 // There should be 0 runs and shapes.
159 EXPECT_EQ(0, uniscribe.m_runs.size());
160 EXPECT_EQ(0, uniscribe.m_shapes.size());
161 EXPECT_EQ(0, uniscribe.m_screenOrder.size());
162
163 EXPECT_EQ(0, uniscribe.width());
164 EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(0));
165 EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(1000));
166 EXPECT_EQ(0, uniscribe.xToCharacter(0));
167 EXPECT_EQ(0, uniscribe.xToCharacter(1000));
168 }
169 }
170