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// Copyright (c) 2011 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/callback.h"
#include "base/file_path.h"
#include "base/ref_counted_memory.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/common/time_format.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.h"
// The path used in internal URLs to file icon data.
static const char kFileIconPath[] = "fileicon";
FileIconSource::FileIconSource()
: DataSource(kFileIconPath, MessageLoop::current()) {}
FileIconSource::~FileIconSource() {
cancelable_consumer_.CancelAllRequests();
}
void FileIconSource::StartDataRequest(const std::string& path,
bool is_off_the_record,
int request_id) {
std::string escaped_path = UnescapeURLComponent(path, 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(escaped_path.begin(), escaped_path.end(), '/', '\\');
FilePath escaped_filepath(UTF8ToWide(escaped_path));
#elif defined(OS_POSIX)
// The correct encoding on Linux may not actually be UTF8.
FilePath escaped_filepath(escaped_path);
#endif
IconManager* im = g_browser_process->icon_manager();
gfx::Image* icon = im->LookupIcon(escaped_filepath, IconLoader::NORMAL);
if (icon) {
scoped_refptr<RefCountedBytes> icon_data(new RefCountedBytes);
gfx::PNGCodec::EncodeBGRASkBitmap(*icon, false, &icon_data->data);
SendResponse(request_id, icon_data);
} else {
// Icon was not in cache, go fetch it slowly.
IconManager::Handle h = im->LoadIcon(escaped_filepath,
IconLoader::NORMAL,
&cancelable_consumer_,
NewCallback(this, &FileIconSource::OnFileIconDataAvailable));
// Attach the ChromeURLDataManager request ID to the history request.
cancelable_consumer_.SetClientData(im, h, 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<RefCountedBytes> icon_data(new RefCountedBytes);
gfx::PNGCodec::EncodeBGRASkBitmap(*icon, false, &icon_data->data);
SendResponse(request_id, icon_data);
} else {
// TODO(glen): send a dummy icon.
SendResponse(request_id, NULL);
}
}
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