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Diffstat (limited to 'components/favicon_base/fallback_icon_service.cc')
-rw-r--r-- | components/favicon_base/fallback_icon_service.cc | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/components/favicon_base/fallback_icon_service.cc b/components/favicon_base/fallback_icon_service.cc new file mode 100644 index 0000000..1642b20 --- /dev/null +++ b/components/favicon_base/fallback_icon_service.cc @@ -0,0 +1,98 @@ +// 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/base/l10n/l10n_util.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 |