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| 1 // Copyright 2013 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 <cmath> | |
| 8 | |
| 9 #import <Cocoa/Cocoa.h> | |
| 10 | |
| 11 #include "base/strings/utf_string_conversions.h" | |
| 12 #include "base/strings/sys_string_conversions.h" | |
| 13 #include "testing/gtest/include/gtest/gtest.h" | |
| 14 #include "ui/gfx/font.h" | |
| 15 #include "ui/gfx/font_list.h" | |
| 16 | |
| 17 namespace gfx { | |
| 18 | |
| 19 namespace { | |
| 20 | |
| 21 // Returns the pixel width of the string via calling the native method | |
| 22 // -sizeWithAttributes. | |
| 23 float GetStringNativeWidth(const base::string16& text, | |
| 24 const FontList& font_list) { | |
| 25 NSFont* native_font = font_list.GetPrimaryFont().GetNativeFont(); | |
| 26 NSString* ns_string = base::SysUTF16ToNSString(text); | |
| 27 NSDictionary* attributes = | |
| 28 [NSDictionary dictionaryWithObject:native_font | |
| 29 forKey:NSFontAttributeName]; | |
| 30 return [ns_string sizeWithAttributes:attributes].width; | |
| 31 } | |
| 32 | |
| 33 } // namespace | |
| 34 | |
| 35 class CanvasTestMac : public testing::Test { | |
| 36 protected: | |
| 37 // Compare the size returned by Canvas::SizeStringInt to the size generated | |
| 38 // by the platform-specific version in CanvasMac_SizeStringInt. Will generate | |
| 39 // expectation failure on any mismatch. Only works for single-line text | |
| 40 // without specified line height, since that is all the platform | |
| 41 // implementation supports. | |
| 42 void CompareSizes(const char* text) { | |
| 43 const float kReallyLargeNumber = 12345678; | |
| 44 FontList font_list(font_); | |
| 45 base::string16 text16 = base::UTF8ToUTF16(text); | |
| 46 | |
| 47 float mac_width = GetStringNativeWidth(text16, font_list); | |
| 48 int mac_height = font_list.GetHeight(); | |
| 49 | |
| 50 float canvas_width = kReallyLargeNumber; | |
| 51 float canvas_height = kReallyLargeNumber; | |
| 52 Canvas::SizeStringFloat( | |
| 53 text16, font_list, &canvas_width, &canvas_height, 0, 0); | |
| 54 | |
| 55 EXPECT_NE(kReallyLargeNumber, mac_width) << "no width for " << text; | |
| 56 EXPECT_NE(kReallyLargeNumber, mac_height) << "no height for " << text; | |
| 57 EXPECT_EQ(mac_width, canvas_width) << " width for " << text; | |
| 58 // FontList::GetHeight returns a truncated height. | |
| 59 EXPECT_EQ(mac_height, | |
| 60 static_cast<int>(canvas_height)) << " height for " << text; | |
| 61 } | |
| 62 | |
| 63 private: | |
| 64 Font font_; | |
| 65 }; | |
| 66 | |
| 67 // Tests that Canvas' SizeStringFloat yields result consistent with a native | |
| 68 // implementation. | |
| 69 TEST_F(CanvasTestMac, StringSizeIdenticalForSkia) { | |
| 70 CompareSizes(""); | |
| 71 CompareSizes("Foo"); | |
| 72 CompareSizes("Longword"); | |
| 73 CompareSizes("This is a complete sentence."); | |
| 74 } | |
| 75 | |
| 76 TEST_F(CanvasTestMac, FractionalWidth) { | |
| 77 const float kReallyLargeNumber = 12345678; | |
| 78 float width = kReallyLargeNumber; | |
| 79 float height = kReallyLargeNumber; | |
| 80 | |
| 81 FontList font_list; | |
| 82 Canvas::SizeStringFloat( | |
| 83 base::UTF8ToUTF16("Test"), font_list, &width, &height, 0, 0); | |
| 84 | |
| 85 EXPECT_GT(width, static_cast<int>(width)); | |
| 86 } | |
| 87 | |
| 88 } // namespace gfx | |
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