| // 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/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& letter) |
| : gfx::CanvasImageSource(gfx::Size(size, size), false), |
| icon_size_(size), |
| letter_(base::UTF8ToUTF16(letter.substr(0, 1))), |
| base_image_(GetBackgroundImageForIconSize(size)) { |
| } |
| |
| ExtensionIconPlaceholder::~ExtensionIconPlaceholder() { |
| } |
| |
| gfx::Image ExtensionIconPlaceholder::CreateImage( |
| extension_misc::ExtensionIcons size, |
| const std::string& name) { |
| return gfx::Image( |
| gfx::ImageSkia(std::make_unique<ExtensionIconPlaceholder>(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 |