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/font_list.h" 6 7 #include "base/lazy_instance.h" 8 #include "base/strings/string_util.h" 9 #include "ui/gfx/font_list_impl.h" 10 11 namespace { 12 13 // Font description of the default font set. 14 base::LazyInstance<std::string>::Leaky g_default_font_description = 15 LAZY_INSTANCE_INITIALIZER; 16 17 // The default instance of gfx::FontListImpl. 18 base::LazyInstance<scoped_refptr<gfx::FontListImpl> >::Leaky g_default_impl = 19 LAZY_INSTANCE_INITIALIZER; 20 bool g_default_impl_initialized = false; 21 22 } // namespace 23 24 namespace gfx { 25 26 FontList::FontList() : impl_(GetDefaultImpl()) {} 27 28 FontList::FontList(const FontList& other) : impl_(other.impl_) {} 29 30 FontList::FontList(const std::string& font_description_string) 31 : impl_(new FontListImpl(font_description_string)) {} 32 33 FontList::FontList(const std::vector<std::string>& font_names, 34 int font_style, 35 int font_size) 36 : impl_(new FontListImpl(font_names, font_style, font_size)) {} 37 38 FontList::FontList(const std::vector<Font>& fonts) 39 : impl_(new FontListImpl(fonts)) {} 40 41 FontList::FontList(const Font& font) : impl_(new FontListImpl(font)) {} 42 43 FontList::~FontList() {} 44 45 FontList& FontList::operator=(const FontList& other) { 46 impl_ = other.impl_; 47 return *this; 48 } 49 50 // static 51 void FontList::SetDefaultFontDescription(const std::string& font_description) { 52 // The description string must end with "px" for size in pixel, or must be 53 // the empty string, which specifies to use a single default font. 54 DCHECK(font_description.empty() || 55 EndsWith(font_description, "px", true)); 56 57 g_default_font_description.Get() = font_description; 58 g_default_impl_initialized = false; 59 } 60 61 FontList FontList::Derive(int size_delta, int font_style) const { 62 return FontList(impl_->Derive(size_delta, font_style)); 63 } 64 65 FontList FontList::DeriveWithSizeDelta(int size_delta) const { 66 return Derive(size_delta, GetFontStyle()); 67 } 68 69 FontList FontList::DeriveWithStyle(int font_style) const { 70 return Derive(0, font_style); 71 } 72 73 int FontList::GetHeight() const { 74 return impl_->GetHeight(); 75 } 76 77 int FontList::GetBaseline() const { 78 return impl_->GetBaseline(); 79 } 80 81 int FontList::GetCapHeight() const { 82 return impl_->GetCapHeight(); 83 } 84 85 int FontList::GetExpectedTextWidth(int length) const { 86 return impl_->GetExpectedTextWidth(length); 87 } 88 89 int FontList::GetFontStyle() const { 90 return impl_->GetFontStyle(); 91 } 92 93 const std::string& FontList::GetFontDescriptionString() const { 94 return impl_->GetFontDescriptionString(); 95 } 96 97 int FontList::GetFontSize() const { 98 return impl_->GetFontSize(); 99 } 100 101 const std::vector<Font>& FontList::GetFonts() const { 102 return impl_->GetFonts(); 103 } 104 105 const Font& FontList::GetPrimaryFont() const { 106 return impl_->GetPrimaryFont(); 107 } 108 109 FontList::FontList(FontListImpl* impl) : impl_(impl) {} 110 111 // static 112 const scoped_refptr<FontListImpl>& FontList::GetDefaultImpl() { 113 // SetDefaultFontDescription() must be called and the default font description 114 // must be set earlier than any call of this function. 115 DCHECK(!(g_default_font_description == NULL)) // != is not overloaded. 116 << "SetDefaultFontDescription has not been called."; 117 118 if (!g_default_impl_initialized) { 119 g_default_impl.Get() = 120 g_default_font_description.Get().empty() ? 121 new FontListImpl(Font()) : 122 new FontListImpl(g_default_font_description.Get()); 123 g_default_impl_initialized = true; 124 } 125 126 return g_default_impl.Get(); 127 } 128 129 } // namespace gfx 130