Mac: More pluming for OOP font loading

chrome/common/font_descriptor_mac_unittest.mm

+// Copyright (c) 2010 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 "chrome/common/font_descriptor_mac.h"
+
+#include <Cocoa/Cocoa.h>
+
+#include "base/logging.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+namespace {
+
+class FontSerializationTest : public PlatformTest {};
+
+
+// Compare 2 fonts, make sure they point at the same font definition and have
+// the same style.  Only Bold & Italic style attributes are tested since those
+// are the only ones we care about at the moment.
+bool CompareFonts(NSFont* font1, NSFont* font2) {
+  ATSFontRef id1 = CTFontGetPlatformFont(reinterpret_cast<CTFontRef>(font1), 0);
+  ATSFontRef id2 = CTFontGetPlatformFont(reinterpret_cast<CTFontRef>(font2), 0);
+  
+  if (id1 != id2) {
+    LOG(ERROR) << "ATSUFontIDs for "

[Avi (use Gerrit), 2010/06/15 13:57:48]

Change the error to refer to ATSFontRefs too.

+        << [[font1 fontName] UTF8String]
+        << " and "
+        << [[font2 fontName] UTF8String]
+        << " are different";
+    return false;
+  }
+  
+  CGFloat size1 = [font1 pointSize];
+  CGFloat size2 = [font2 pointSize];
+  if (size1 != size2) {
+    LOG(ERROR) << "font sizes for "
+        << [[font1 fontName] UTF8String] << " (" << size1 << ")"
+        << "and"
+        << [[font2 fontName] UTF8String]  << " (" << size2 << ")"
+        << " are different";
+    return false;
+  }
+
+  NSFontTraitMask traits1 = [[NSFontManager sharedFontManager]
+                                traitsOfFont:font1];
+  NSFontTraitMask traits2 = [[NSFontManager sharedFontManager]
+                                traitsOfFont:font2];
+  
+  bool is_bold1 = traits1 & NSBoldFontMask;
+  bool is_bold2 = traits2 & NSBoldFontMask;
+  bool is_italic1 = traits1 & NSItalicFontMask;
+  bool is_italic2 = traits2 & NSItalicFontMask;
+  
+  if (is_bold1 != is_bold2 || is_italic1 != is_italic2) {
+    LOG(ERROR) << "Style information for "
+        << [[font1 fontName] UTF8String]
+        << " and "
+        << [[font2 fontName] UTF8String]
+        << " are different";
+        return false;
+  }
+  
+  return true;
+}
+
+// Verify that serialization and deserialization of fonts with various styles
+// is performed correctly by FontDescriptor.
+TEST_F(FontSerializationTest, StyledFonts) {
+  NSFont* plain_font = [NSFont systemFontOfSize:12.0];
+  ASSERT_TRUE(plain_font != nil);
+  FontDescriptor desc_plain(plain_font);
+  EXPECT_TRUE(CompareFonts(plain_font, desc_plain.nsFont()));
+  
+  NSFont* bold_font = [NSFont boldSystemFontOfSize:30.0];
+  ASSERT_TRUE(bold_font != nil);
+  FontDescriptor desc_bold(bold_font);
+  EXPECT_TRUE(CompareFonts(bold_font, desc_bold.nsFont()));
+  
+  NSFont* italic_bold_font =
+      [[NSFontManager sharedFontManager]
+          fontWithFamily:@"Courier"
+                  traits:(NSBoldFontMask | NSItalicFontMask)
+                  weight:5
+                    size:18.0];
+  ASSERT_TRUE(italic_bold_font != nil);
+  FontDescriptor desc_italic_bold(italic_bold_font);
+  EXPECT_TRUE(CompareFonts(italic_bold_font, desc_italic_bold.nsFont()));
+}
+
+}  // namsepace