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// Copyright 2015 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 "components/favicon_base/fallback_icon_service.h"
#include <algorithm>
#include "base/i18n/case_conversion.h"
#include "base/strings/utf_string_conversions.h"
#include "components/favicon_base/fallback_icon_style.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "url/gurl.h"
namespace favicon_base {
namespace {
// Arbitrary maximum icon size, can be reasonably increased if needed.
const int kMaxFallbackFaviconSize = 288;
// Returns a single character to represent a page URL. To do this we take the
// first letter in a domain's name and make it upper case.
// TODO(huangs): Handle non-ASCII ("xn--") domain names.
base::string16 GetFallbackIconText(const GURL& url) {
std::string domain = net::registry_controlled_domains::GetDomainAndRegistry(
url, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
return domain.empty() ? base::string16() :
base::i18n::ToUpper(base::ASCIIToUTF16(domain.substr(0, 1)));
}
} // namespace
FallbackIconService::FallbackIconService(
const std::vector<std::string>& font_list)
: font_list_(font_list) {
}
FallbackIconService::~FallbackIconService() {
}
std::vector<unsigned char> FallbackIconService::RenderFallbackIconBitmap(
const GURL& icon_url,
int size,
const FallbackIconStyle& style) {
int size_to_use = std::min(kMaxFallbackFaviconSize, size);
gfx::Canvas canvas(gfx::Size(size_to_use, size_to_use), 1.0f, false);
DrawFallbackIcon(icon_url, size_to_use, style, &canvas);
std::vector<unsigned char> bitmap_data;
if (!gfx::PNGCodec::EncodeBGRASkBitmap(canvas.ExtractImageRep().sk_bitmap(),
false, &bitmap_data)) {
bitmap_data.clear();
}
return bitmap_data;
}
void FallbackIconService::DrawFallbackIcon(const GURL& icon_url,
int size,
const FallbackIconStyle& style,
gfx::Canvas* canvas) {
const int kOffsetX = 0;
const int kOffsetY = 0;
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
// Draw a filled, colored rounded square.
paint.setColor(style.background_color);
int corner_radius = static_cast<int>(size * style.roundness * 0.5 + 0.5);
canvas->DrawRoundRect(
gfx::Rect(kOffsetX, kOffsetY, size, size), corner_radius, paint);
// Draw text.
base::string16 icon_text = GetFallbackIconText(icon_url);
if (icon_text.empty())
return;
int font_size = static_cast<int>(size * style.font_size_ratio);
if (font_size <= 0)
return;
// TODO(huangs): See how expensive gfx::FontList() is, and possibly cache.
canvas->DrawStringRectWithFlags(
icon_text,
gfx::FontList(font_list_, gfx::Font::NORMAL, font_size),
style.text_color,
gfx::Rect(kOffsetX, kOffsetY, size, size),
gfx::Canvas::TEXT_ALIGN_CENTER);
}
} // namespace favicon_base
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