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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/basictypes.h"
#include "base/callback.h"
#include "base/file_path.h"
#include "base/memory/ref_counted_memory.h"
#include "base/string_split.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/common/time_format.h"
#include "googleurl/src/gurl.h"
#include "grit/generated_resources.h"
#include "net/base/escape.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/image/image.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 kIconSize[] = "iconsize";
// Assuming the url is of the form '/path?query', convert the path portion into
// a FilePath and return the resulting |file_path| and |query|. The path
// portion may have been encoded using encodeURIComponent().
void GetFilePathAndQuery(const std::string& url,
FilePath* file_path,
std::string* query) {
// We receive the url with chrome://fileicon/ stripped but GURL expects it.
const GURL gurl("chrome://fileicon/" + url);
std::string path =
net::UnescapeURLComponent(gurl.path().substr(1),
(net::UnescapeRule::URL_SPECIAL_CHARS |
net::UnescapeRule::SPACES));
#if defined(OS_WIN)
// The path we receive has the wrong slashes and escaping for what we need;
// this only appears to matter for getting icons from .exe files.
std::replace(path.begin(), path.end(), '/', '\\');
*file_path = FilePath(UTF8ToWide(path));
#elif defined(OS_POSIX)
// The correct encoding on Linux may not actually be UTF8.
*file_path = FilePath(path);
#endif
query->assign(gurl.query());
}
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;
}
// Simple parser for data on the query.
IconLoader::IconSize QueryToIconSize(const std::string& query) {
typedef std::pair<std::string, std::string> KVPair;
std::vector<KVPair> parameters;
base::SplitStringIntoKeyValuePairs(query, '=', '&', ¶meters);
for (std::vector<KVPair>::const_iterator iter = parameters.begin();
iter != parameters.end(); ++iter) {
if (iter->first == kIconSize)
return SizeStringToIconSize(iter->second);
}
return IconLoader::NORMAL;
}
} // namespace
FileIconSource::FileIconSource()
: DataSource(kFileIconPath, MessageLoop::current()) {}
FileIconSource::~FileIconSource() {
cancelable_consumer_.CancelAllRequests();
}
void FileIconSource::FetchFileIcon(const FilePath& path,
IconLoader::IconSize icon_size,
int request_id) {
IconManager* im = g_browser_process->icon_manager();
gfx::Image* icon = im->LookupIcon(path, icon_size);
if (icon) {
scoped_refptr<base::RefCountedBytes> icon_data(new base::RefCountedBytes);
gfx::PNGCodec::EncodeBGRASkBitmap(*icon->ToSkBitmap(), false,
&icon_data->data());
SendResponse(request_id, icon_data);
} else {
// Icon was not in cache, go fetch it slowly.
IconManager::Handle h = im->LoadIcon(
path, icon_size, &cancelable_consumer_,
base::Bind(&FileIconSource::OnFileIconDataAvailable,
base::Unretained(this)));
// Attach the ChromeURLDataManager request ID to the history request.
cancelable_consumer_.SetClientData(im, h, request_id);
}
}
void FileIconSource::StartDataRequest(const std::string& url_path,
bool is_incognito,
int request_id) {
std::string query;
FilePath file_path;
GetFilePathAndQuery(url_path, &file_path, &query);
FetchFileIcon(file_path, QueryToIconSize(query), request_id);
}
std::string FileIconSource::GetMimeType(const std::string&) const {
// Rely on image decoder inferring the correct type.
return std::string();
}
void FileIconSource::OnFileIconDataAvailable(IconManager::Handle handle,
gfx::Image* icon) {
IconManager* im = g_browser_process->icon_manager();
int request_id = cancelable_consumer_.GetClientData(im, handle);
if (icon) {
scoped_refptr<base::RefCountedBytes> icon_data(new base::RefCountedBytes);
gfx::PNGCodec::EncodeBGRASkBitmap(*icon->ToSkBitmap(), false,
&icon_data->data());
SendResponse(request_id, icon_data);
} else {
// TODO(glen): send a dummy icon.
SendResponse(request_id, NULL);
}
}
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