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// 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 "base/gfx/uniscribe.h"
#include "base/win_util.h"
#include "testing/gtest/include/gtest/gtest.h"
// This must be in the gfx namespace for the friend statements in uniscribe.h
// to work.
namespace gfx {
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* font_name, SCRIPT_CACHE** cache) {
LOGFONT lf;
memset(&lf, 0, sizeof(LOGFONT));
lf.lfHeight = 20;
wcscpy_s(lf.lfFaceName, font_name);
HFONT hfont = CreateFontIndirect(&lf);
if (!hfont)
return NULL;
*cache = new SCRIPT_CACHE;
**cache = NULL;
created_fonts_.push_back(std::make_pair(hfont, *cache));
return hfont;
}
protected:
// Default font properties structure for tests to use.
SCRIPT_FONTPROPERTIES properties_;
private:
virtual void SetUp() {
memset(&properties_, 0, sizeof(SCRIPT_FONTPROPERTIES));
properties_.cBytes = sizeof(SCRIPT_FONTPROPERTIES);
properties_.wgBlank = ' ';
properties_.wgDefault = '?'; // Used when the character is not in the font.
properties_.wgInvalid = '#'; // Used for invalid characters.
}
virtual void TearDown() {
// Free any allocated fonts.
for (size_t i = 0; i < created_fonts_.size(); i++) {
DeleteObject(created_fonts_[i].first);
ScriptFreeCache(created_fonts_[i].second);
delete created_fonts_[i].second;
}
created_fonts_.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.
std::vector< std::pair<HFONT, SCRIPT_CACHE*> > created_fonts_;
DISALLOW_EVIL_CONSTRUCTORS(UniscribeTest);
};
} // namespace
// This test tests giving Uniscribe a very large buffer, which will cause a
// failure.
TEST_F(UniscribeTest, TooBig) {
// This test will only run on Windows XP. It seems Uniscribe does not have the
// internal limit on Windows 2000 that we rely on to cause this failure.
if (win_util::GetWinVersion() <= win_util::WINVERSION_2000)
return;
// Make a large string with an e with a zillion combining accents.
std::wstring input(L"e");
for (int i = 0; i < 100000; i++)
input.push_back(0x301); // Combining acute accent.
SCRIPT_CACHE* script_cache;
HFONT hfont = MakeFont(L"Times New Roman", &script_cache);
ASSERT_TRUE(hfont);
// Test a long string without the normal length protection we have. This will
// cause shaping to fail.
{
gfx::UniscribeState uniscribe(input.data(), static_cast<int>(input.size()),
false, hfont, script_cache, &properties_);
uniscribe.InitWithOptionalLengthProtection(false);
// There should be one shaping entry, with nothing in it.
ASSERT_EQ(1, uniscribe.shapes_->size());
EXPECT_EQ(0, uniscribe.shapes_[0].glyphs->size());
EXPECT_EQ(0, uniscribe.shapes_[0].logs->size());
EXPECT_EQ(0, uniscribe.shapes_[0].visattr->size());
EXPECT_EQ(0, uniscribe.shapes_[0].advance->size());
EXPECT_EQ(0, uniscribe.shapes_[0].offsets->size());
EXPECT_EQ(0, uniscribe.shapes_[0].justify->size());
EXPECT_EQ(0, uniscribe.shapes_[0].abc.abcA);
EXPECT_EQ(0, uniscribe.shapes_[0].abc.abcB);
EXPECT_EQ(0, uniscribe.shapes_[0].abc.abcC);
// The sizes of the other stuff should match the shaping entry.
EXPECT_EQ(1, uniscribe.runs_->size());
EXPECT_EQ(1, uniscribe.screen_order_->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.
{
gfx::UniscribeState uniscribe(input.data(), static_cast<int>(input.size()),
false, hfont, script_cache, &properties_);
uniscribe.InitWithOptionalLengthProtection(true);
// There should be 0 runs and shapes.
EXPECT_EQ(0, uniscribe.runs_->size());
EXPECT_EQ(0, uniscribe.shapes_->size());
EXPECT_EQ(0, uniscribe.screen_order_->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));
}
}
} // namespace gfx
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