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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 "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_ACTION:
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_ACTION:
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(new 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
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