blob: d61f90f88442b9741789592b96033a5e8dc94f98 [file] [log] [blame]
// Copyright (c) 2006-2008 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 "config.h"
#include "UniscribeHelper.h"
#include "PlatformString.h"
#include "testing/gtest/include/gtest/gtest.h"
using WebCore::String;
using WebCore::UniscribeHelper;
namespace {
class UniscribeTest : public testing::Test {
public:
UniscribeTest()
{
}
// Returns an HFONT with the given name. The caller does not have to free
// this, it will be automatically freed at the end of the test. Returns NULL
// on failure. On success, the
HFONT MakeFont(const wchar_t* fontName, SCRIPT_CACHE** cache)
{
LOGFONT lf;
memset(&lf, 0, sizeof(LOGFONT));
lf.lfHeight = 20;
wcscpy_s(lf.lfFaceName, fontName);
HFONT hfont = CreateFontIndirect(&lf);
if (!hfont)
return NULL;
*cache = new SCRIPT_CACHE;
**cache = NULL;
m_createdFonts.append(std::make_pair(hfont, *cache));
return hfont;
}
protected:
// Default font properties structure for tests to use.
SCRIPT_FONTPROPERTIES m_properties;
private:
virtual void SetUp()
{
memset(&m_properties, 0, sizeof(SCRIPT_FONTPROPERTIES));
m_properties.cBytes = sizeof(SCRIPT_FONTPROPERTIES);
m_properties.wgBlank = ' ';
m_properties.wgDefault = '?'; // Used when the char is not in the font.
m_properties.wgInvalid = '#'; // Used for invalid characters.
}
virtual void TearDown()
{
// Free any allocated fonts.
for (size_t i = 0; i < m_createdFonts.size(); i++) {
DeleteObject(m_createdFonts[i].first);
ScriptFreeCache(m_createdFonts[i].second);
delete m_createdFonts[i].second;
}
m_createdFonts.clear();
}
// Tracks allocated fonts so we can delete them at the end of the test.
// The script cache pointer is heap allocated and must be freed.
Vector< std::pair<HFONT, SCRIPT_CACHE*> > m_createdFonts;
};
} // namespace
// This test tests giving Uniscribe a very large buffer, which will cause a
// failure.
TEST_F(UniscribeTest, TooBig)
{
// Make a large string with an e with a zillion combining accents.
String input(L"e");
for (int i = 0; i < 100000; i++)
input.append(static_cast<UChar>(0x301)); // Combining acute accent.
SCRIPT_CACHE* scriptCache;
HFONT hfont = MakeFont(L"Times New Roman", &scriptCache);
ASSERT_TRUE(hfont);
// Test a long string without the normal length protection we have. This
// will cause shaping to fail.
{
UniscribeHelper uniscribe(
input.characters(), static_cast<int>(input.length()),
false, hfont, scriptCache, &m_properties);
uniscribe.initWithOptionalLengthProtection(false);
// There should be one shaping entry, with nothing in it.
ASSERT_EQ(1, uniscribe.m_shapes.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_glyphs.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_logs.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_visualAttributes.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_advance.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_offsets.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_justify.size());
EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcA);
EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcB);
EXPECT_EQ(0, uniscribe.m_shapes[0].m_abc.abcC);
// The sizes of the other stuff should match the shaping entry.
EXPECT_EQ(1, uniscribe.m_runs.size());
EXPECT_EQ(1, uniscribe.m_screenOrder.size());
// Check that the various querying functions handle the empty case
// properly.
EXPECT_EQ(0, uniscribe.width());
EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(0));
EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(1000));
EXPECT_EQ(0, uniscribe.xToCharacter(0));
EXPECT_EQ(0, uniscribe.xToCharacter(1000));
}
// Now test the very large string and make sure it is handled properly by
// the length protection.
{
UniscribeHelper uniscribe(
input.characters(), static_cast<int>(input.length()),
false, hfont, scriptCache, &m_properties);
uniscribe.initWithOptionalLengthProtection(true);
// There should be 0 runs and shapes.
EXPECT_EQ(0, uniscribe.m_runs.size());
EXPECT_EQ(0, uniscribe.m_shapes.size());
EXPECT_EQ(0, uniscribe.m_screenOrder.size());
EXPECT_EQ(0, uniscribe.width());
EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(0));
EXPECT_EQ(0, uniscribe.firstGlyphForCharacter(1000));
EXPECT_EQ(0, uniscribe.xToCharacter(0));
EXPECT_EQ(0, uniscribe.xToCharacter(1000));
}
}