1/*
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29 */
30
31#include "config.h"
32
33#include <gtest/gtest.h>
34
35#include "PlatformString.h"
36#include "UniscribeHelper.h"
37
38using namespace WebCore;
39
40namespace {
41
42class UniscribeTest : public testing::Test {
43public:
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
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
68protected:
69    // Default font properties structure for tests to use.
70    SCRIPT_FONTPROPERTIES properties;
71
72private:
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
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.
102TEST_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        UniscribeHelper uniscribe(
117            input.characters(), static_cast<int>(input.length()),
118            false, hfont, scriptCache, &properties, 0);
119        uniscribe.initWithOptionalLengthProtection(false);
120
121        // There should be one shaping entry, with nothing in it.
122        ASSERT_EQ(1, uniscribe.m_shapes.size());
123        EXPECT_EQ(0, uniscribe.m_shapes[0].m_glyphs.size());
124        EXPECT_EQ(0, uniscribe.m_shapes[0].m_logs.size());
125        EXPECT_EQ(0, uniscribe.m_shapes[0].m_visualAttributes.size());
126        EXPECT_EQ(0, uniscribe.m_shapes[0].m_advance.size());
127        EXPECT_EQ(0, uniscribe.m_shapes[0].m_offsets.size());
128        EXPECT_EQ(0, uniscribe.m_shapes[0].m_justify.size());
129        EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcA);
130        EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcB);
131        EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcC);
132
133        // The sizes of the other stuff should match the shaping entry.
134        EXPECT_EQ(1, uniscribe.m_runs.size());
135        EXPECT_EQ(1, uniscribe.m_screenOrder.size());
136
137        // Check that the various querying functions handle the empty case
138        // properly.
139        EXPECT_EQ(0, uniscribe.width());
140        EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(0));
141        EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(1000));
142        EXPECT_EQ(0, uniscribe.xToCharacter(0));
143        EXPECT_EQ(0, uniscribe.xToCharacter(1000));
144    }
145
146    // Now test the very large string and make sure it is handled properly by
147    // the length protection.
148    {
149        UniscribeHelper uniscribe(
150            input.characters(), static_cast<int>(input.length()),
151            false, hfont, scriptCache, &properties, 0);
152        uniscribe.initWithOptionalLengthProtection(true);
153
154        // There should be 0 runs and shapes.
155        EXPECT_EQ(0, uniscribe.m_runs.size());
156        EXPECT_EQ(0, uniscribe.m_shapes.size());
157        EXPECT_EQ(0, uniscribe.m_screenOrder.size());
158
159        EXPECT_EQ(0, uniscribe.width());
160        EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(0));
161        EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(1000));
162        EXPECT_EQ(0, uniscribe.xToCharacter(0));
163        EXPECT_EQ(0, uniscribe.xToCharacter(1000));
164    }
165}
166