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// Copyright (c) 2012 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 <stdlib.h>
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "base/string_split.h"
#include "base/string_util.h"
#include "ui/gfx/font_list.h"
namespace {
// Parses font description into |font_names|, |font_style| and |font_size|.
void ParseFontDescriptionString(const std::string& font_description_string,
std::vector<std::string>* font_names,
int* font_style,
int* font_size) {
base::SplitString(font_description_string, ',', font_names);
DCHECK_GT(font_names->size(), 1U);
// The last item is [STYLE_OPTIONS] SIZE.
std::vector<std::string> styles_size;
base::SplitString(font_names->back(), ' ', &styles_size);
DCHECK(!styles_size.empty());
base::StringToInt(styles_size.back(), font_size);
DCHECK_GT(*font_size, 0);
font_names->pop_back();
// Besides underline (which is supported through StyleRange), Font only
// supports BOLD and ITALIC, but not other styles.
*font_style = 0;
for (size_t i = 0; i < styles_size.size() - 1; ++i) {
// Styles are separated by white spaces. base::SplitString splits styles
// by space, and it inserts empty string for continuous spaces.
if (styles_size[i].empty())
continue;
if (!styles_size[i].compare("Bold"))
*font_style |= gfx::Font::BOLD;
else if (!styles_size[i].compare("Italic"))
*font_style |= gfx::Font::ITALIC;
else
NOTREACHED();
}
}
// Returns the font style and size as a string.
std::string FontStyleAndSizeToString(int font_style, int font_size) {
std::string result;
if (font_style & gfx::Font::BOLD)
result += "Bold ";
if (font_style & gfx::Font::ITALIC)
result += "Italic ";
result += base::IntToString(font_size);
result += "px";
return result;
}
// Returns font description from |font_names|, |font_style|, and |font_size|.
std::string BuildFontDescription(const std::vector<std::string>& font_names,
int font_style,
int font_size) {
std::string description = JoinString(font_names, ',');
description += "," + FontStyleAndSizeToString(font_style, font_size);
return description;
}
} // namespace
namespace gfx {
FontList::FontList() {
fonts_.push_back(Font());
}
FontList::FontList(const std::string& font_description_string)
: font_description_string_(font_description_string) {
DCHECK(!font_description_string.empty());
// DCHECK description string ends with "px" for size in pixel.
DCHECK(EndsWith(font_description_string, "px", true));
}
FontList::FontList(const std::vector<Font>& fonts)
: fonts_(fonts) {
DCHECK(!fonts.empty());
if (DCHECK_IS_ON()) {
int style = fonts[0].GetStyle();
int size = fonts[0].GetFontSize();
for (size_t i = 1; i < fonts.size(); ++i) {
DCHECK_EQ(fonts[i].GetStyle(), style);
DCHECK_EQ(fonts[i].GetFontSize(), size);
}
}
}
FontList::FontList(const Font& font) {
fonts_.push_back(font);
}
FontList::~FontList() {
}
FontList FontList::DeriveFontList(int font_style) const {
// If there is a font vector, derive from that.
if (!fonts_.empty()) {
std::vector<Font> fonts = fonts_;
for (size_t i = 0; i < fonts.size(); ++i)
fonts[i] = fonts[i].DeriveFont(0, font_style);
return FontList(fonts);
}
// Otherwise, parse the font description string to derive from it.
std::vector<std::string> font_names;
int old_style;
int font_size;
ParseFontDescriptionString(font_description_string_, &font_names,
&old_style, &font_size);
return FontList(BuildFontDescription(font_names, font_style, font_size));
}
FontList FontList::DeriveFontListWithSize(int size) const {
DCHECK_GT(size, 0);
// If there is a font vector, derive from that.
int old_size = 0;
if (!fonts_.empty()) {
old_size = fonts_[0].GetFontSize();
if (old_size == size)
return FontList(fonts_);
std::vector<Font> fonts = fonts_;
for (size_t i = 0; i < fonts.size(); ++i)
fonts[i] = fonts[i].DeriveFont(size - old_size);
return FontList(fonts);
}
// Otherwise, parse the font description string to derive from it.
std::vector<std::string> font_names;
int font_style = 0;
ParseFontDescriptionString(font_description_string_, &font_names,
&font_style, &old_size);
if (old_size == size)
return FontList(font_description_string_);
return FontList(BuildFontDescription(font_names, font_style, size));
}
int FontList::GetFontStyle() const {
if (!fonts_.empty())
return fonts_[0].GetStyle();
std::vector<std::string> font_names;
int font_style;
int font_size;
ParseFontDescriptionString(font_description_string_, &font_names,
&font_style, &font_size);
return font_style;
}
const std::string& FontList::GetFontDescriptionString() const {
if (font_description_string_.empty()) {
DCHECK(!fonts_.empty());
for (size_t i = 0; i < fonts_.size(); ++i) {
std::string name = fonts_[i].GetFontName();
font_description_string_ += name;
font_description_string_ += ',';
}
// All fonts have the same style and size.
font_description_string_ +=
FontStyleAndSizeToString(fonts_[0].GetStyle(), fonts_[0].GetFontSize());
}
return font_description_string_;
}
const std::vector<Font>& FontList::GetFonts() const {
if (fonts_.empty()) {
DCHECK(!font_description_string_.empty());
std::vector<std::string> font_names;
int font_style;
int font_size;
ParseFontDescriptionString(font_description_string_, &font_names,
&font_style, &font_size);
for (size_t i = 0; i < font_names.size(); ++i) {
DCHECK(!font_names[i].empty());
Font font(font_names[i], font_size);
if (font_style == Font::NORMAL)
fonts_.push_back(font);
else
fonts_.push_back(font.DeriveFont(0, font_style));
}
}
return fonts_;
}
} // namespace gfx
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