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// Copyright (c) 2012 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 "chrome/browser/ui/webui/fileicon_source.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/string_split.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/common/webui_url_constants.h"
#include "net/base/escape.h"
#include "net/base/url_util.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/webui/web_ui_util.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "url/gurl.h"
namespace {
typedef std::map<std::string, IconLoader::IconSize> QueryIconSizeMap;
// The path used in internal URLs to file icon data.
const char kFileIconPath[] = "fileicon";
// URL parameter specifying icon size.
const char kIconSizeParameter[] = "iconsize";
// URL parameter specifying the file path for which to get an icon.
const char kPathParameter[] = "path";
// URL parameter specifying scale factor.
const char kScaleFactorParameter[] = "scale";
IconLoader::IconSize SizeStringToIconSize(const std::string& size_string) {
if (size_string == "small") return IconLoader::SMALL;
if (size_string == "large") return IconLoader::LARGE;
// We default to NORMAL if we don't recognize the size_string. Including
// size_string=="normal".
return IconLoader::NORMAL;
}
void ParseQueryParams(const std::string& path,
base::FilePath* file_path,
float* scale_factor,
IconLoader::IconSize* icon_size) {
GURL request = GURL(chrome::kChromeUIFileiconURL).Resolve(path);
for (net::QueryIterator it(request); !it.IsAtEnd(); it.Advance()) {
std::string key = it.GetKey();
if (key == kPathParameter) {
*file_path = base::FilePath::FromUTF8Unsafe(it.GetUnescapedValue())
.NormalizePathSeparators();
} else if (key == kIconSizeParameter) {
*icon_size = SizeStringToIconSize(it.GetValue());
} else if (key == kScaleFactorParameter) {
webui::ParseScaleFactor(it.GetValue(), scale_factor);
}
}
}
} // namespace
FileIconSource::IconRequestDetails::IconRequestDetails() : scale_factor(1.0f) {
}
FileIconSource::IconRequestDetails::IconRequestDetails(
const IconRequestDetails& other) = default;
FileIconSource::IconRequestDetails::~IconRequestDetails() {
}
FileIconSource::FileIconSource() {}
FileIconSource::~FileIconSource() {}
void FileIconSource::FetchFileIcon(
const base::FilePath& path,
float scale_factor,
IconLoader::IconSize icon_size,
const content::URLDataSource::GotDataCallback& callback) {
IconManager* im = g_browser_process->icon_manager();
gfx::Image* icon = im->LookupIconFromFilepath(path, icon_size);
if (icon) {
scoped_refptr<base::RefCountedBytes> icon_data(new base::RefCountedBytes);
gfx::PNGCodec::EncodeBGRASkBitmap(
icon->ToImageSkia()->GetRepresentation(scale_factor).GetBitmap(), false,
&icon_data->data());
callback.Run(icon_data.get());
} else {
// Attach the ChromeURLDataManager request ID to the history request.
IconRequestDetails details;
details.callback = callback;
details.scale_factor = scale_factor;
// Icon was not in cache, go fetch it slowly.
im->LoadIcon(path,
icon_size,
base::Bind(&FileIconSource::OnFileIconDataAvailable,
base::Unretained(this), details),
&cancelable_task_tracker_);
}
}
std::string FileIconSource::GetSource() {
return kFileIconPath;
}
void FileIconSource::StartDataRequest(
const std::string& path,
const content::WebContents::Getter& wc_getter,
const content::URLDataSource::GotDataCallback& callback) {
base::FilePath file_path;
IconLoader::IconSize icon_size = IconLoader::NORMAL;
float scale_factor = 1.0f;
ParseQueryParams(path, &file_path, &scale_factor, &icon_size);
FetchFileIcon(file_path, scale_factor, icon_size, callback);
}
std::string FileIconSource::GetMimeType(const std::string&) {
// Rely on image decoder inferring the correct type.
return std::string();
}
bool FileIconSource::AllowCaching() {
return false;
}
void FileIconSource::OnFileIconDataAvailable(const IconRequestDetails& details,
gfx::Image icon) {
if (!icon.IsEmpty()) {
scoped_refptr<base::RefCountedBytes> icon_data(new base::RefCountedBytes);
gfx::PNGCodec::EncodeBGRASkBitmap(
icon.ToImageSkia()->GetRepresentation(details.scale_factor).GetBitmap(),
false, &icon_data->data());
details.callback.Run(icon_data.get());
} else {
// TODO(glen): send a dummy icon.
details.callback.Run(NULL);
}
}
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