1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "ui/gfx/canvas.h" 6 7#include <limits> 8 9#include "base/strings/utf_string_conversions.h" 10#include "testing/gtest/include/gtest/gtest.h" 11#include "ui/gfx/font_list.h" 12#include "ui/gfx/geometry/rect.h" 13#include "ui/gfx/geometry/rect_f.h" 14#include "ui/gfx/skia_util.h" 15 16namespace gfx { 17 18class CanvasTest : public testing::Test { 19 protected: 20 int GetStringWidth(const char *text) { 21 return Canvas::GetStringWidth(base::UTF8ToUTF16(text), font_list_); 22 } 23 24 gfx::Size SizeStringInt(const char *text, int width, int line_height) { 25 base::string16 text16 = base::UTF8ToUTF16(text); 26 int height = 0; 27 int flags = 28 (text16.find('\n') != base::string16::npos) ? Canvas::MULTI_LINE : 0; 29 Canvas::SizeStringInt(text16, font_list_, &width, &height, line_height, 30 flags); 31 return gfx::Size(width, height); 32 } 33 34 private: 35 FontList font_list_; 36}; 37 38TEST_F(CanvasTest, StringWidth) { 39 EXPECT_GT(GetStringWidth("Test"), 0); 40} 41 42TEST_F(CanvasTest, StringWidthEmptyString) { 43 EXPECT_EQ(0, GetStringWidth("")); 44} 45 46TEST_F(CanvasTest, StringSizeEmptyString) { 47 gfx::Size size = SizeStringInt("", 0, 0); 48 EXPECT_EQ(0, size.width()); 49 EXPECT_GT(size.height(), 0); 50} 51 52// Verifies GetClipBounds() returns the correct value. 53TEST_F(CanvasTest, ClipRectWithScaling) { 54 Canvas canvas(gfx::Size(200, 100), 2.25, true); 55 canvas.sk_canvas()->clipRect(RectFToSkRect(gfx::RectF(100, 0, 20, 1.7f))); 56 gfx::Rect clip_rect; 57 ASSERT_TRUE(canvas.GetClipBounds(&clip_rect)); 58 // Use Contains() rather than Equals() as skia may extend the rect in certain 59 // directions. None-the-less the clip must contain the region we damaged. 60 EXPECT_TRUE(clip_rect.Contains(gfx::Rect(100, 0, 20, 2))); 61} 62 63// Line height is only supported on Skia. 64#if defined(OS_MACOSX) || defined(OS_ANDROID) 65#define MAYBE_StringSizeWithLineHeight DISABLED_StringSizeWithLineHeight 66#else 67#define MAYBE_StringSizeWithLineHeight StringSizeWithLineHeight 68#endif 69 70TEST_F(CanvasTest, MAYBE_StringSizeWithLineHeight) { 71 gfx::Size one_line_size = SizeStringInt("Q", 0, 0); 72 gfx::Size four_line_size = SizeStringInt("Q\nQ\nQ\nQ", 1000000, 1000); 73 EXPECT_EQ(one_line_size.width(), four_line_size.width()); 74 EXPECT_EQ(3 * 1000 + one_line_size.height(), four_line_size.height()); 75} 76 77} // namespace gfx 78