// 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 "extensions/browser/extension_icon_placeholder.h" #include "base/i18n/rtl.h" #include "base/strings/string_util.h" #include "base/strings/utf_string_conversions.h" #include "extensions/grit/extensions_browser_resources.h" #include "ui/base/resource/resource_bundle.h" #include "ui/gfx/canvas.h" #include "ui/gfx/codec/png_codec.h" #include "ui/gfx/geometry/rect.h" #include "ui/gfx/geometry/size.h" #include "ui/gfx/image/canvas_image_source.h" #include "ui/gfx/image/image_skia.h" namespace extensions { namespace { // Returns the FontStyle to use for the given icon |size|. ui::ResourceBundle::FontStyle GetFontStyleForIconSize( extension_misc::ExtensionIcons size) { switch (size) { case extension_misc::EXTENSION_ICON_INVALID: case extension_misc::EXTENSION_ICON_BITTY: return ui::ResourceBundle::SmallFont; case extension_misc::EXTENSION_ICON_SMALLISH: case extension_misc::EXTENSION_ICON_SMALL: return ui::ResourceBundle::MediumFont; case extension_misc::EXTENSION_ICON_MEDIUM: case extension_misc::EXTENSION_ICON_LARGE: case extension_misc::EXTENSION_ICON_EXTRA_LARGE: case extension_misc::EXTENSION_ICON_GIGANTOR: return ui::ResourceBundle::LargeFont; } NOTREACHED(); return ui::ResourceBundle::MediumFont; } // Returns the background image to use for the given icon |size|. gfx::Image GetBackgroundImageForIconSize(extension_misc::ExtensionIcons size) { int resource_id = 0; // Right now, we have resources for a 19x19 (action) and a 48x48 (extensions // page icon). The implementation of the placeholder scales these correctly, // so it's not a big deal to use these for other sizes, but if it's something // that will be done frequently, we should probably make a devoted asset for // that size. switch (size) { case extension_misc::EXTENSION_ICON_INVALID: case extension_misc::EXTENSION_ICON_BITTY: case extension_misc::EXTENSION_ICON_SMALLISH: case extension_misc::EXTENSION_ICON_SMALL: resource_id = IDR_EXTENSION_ACTION_PLAIN_BACKGROUND; break; case extension_misc::EXTENSION_ICON_MEDIUM: case extension_misc::EXTENSION_ICON_LARGE: case extension_misc::EXTENSION_ICON_EXTRA_LARGE: case extension_misc::EXTENSION_ICON_GIGANTOR: resource_id = IDR_EXTENSION_ICON_PLAIN_BACKGROUND; break; } return ui::ResourceBundle::GetSharedInstance().GetImageNamed(resource_id); } } // namespace ExtensionIconPlaceholder::ExtensionIconPlaceholder( extension_misc::ExtensionIcons size, const std::string& name) : gfx::CanvasImageSource(gfx::Size(size, size)), icon_size_(size), base_image_(GetBackgroundImageForIconSize(size)) { // Remove RTL formatting characters, if any, that may pad the extension name. // See https://crbug.com/869358 std::u16string sanitized_name = base::UTF8ToUTF16(std::string(name)); base::i18n::UnadjustStringForLocaleDirection(&sanitized_name); letter_ = sanitized_name.substr(0, 1); } ExtensionIconPlaceholder::~ExtensionIconPlaceholder() { } gfx::Image ExtensionIconPlaceholder::CreateImage( extension_misc::ExtensionIcons size, const std::string& name) { return gfx::Image( gfx::ImageSkia(std::make_unique(size, name), gfx::Size(size, size))); } void ExtensionIconPlaceholder::Draw(gfx::Canvas* canvas) { // Draw the background image, correctly scaled. canvas->DrawImageInt(*base_image_.ToImageSkia(), 0, 0, base_image_.Size().width(), base_image_.Size().height(), 0, 0, size().width(), size().height(), true); gfx::Rect bounds(size().width(), size().height()); // Draw the letter on top. canvas->DrawStringRectWithFlags( letter_, ui::ResourceBundle::GetSharedInstance().GetFontList( GetFontStyleForIconSize(icon_size_)), SK_ColorWHITE, bounds, gfx::Canvas::TEXT_ALIGN_CENTER); } } // namespace extensions