Initial checkin of the HTML downloads UI. It's not yet complete (lacking...

chrome/browser/dom_ui/fileicon_source.cc

+// Copyright (c) 2006-2008 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/dom_ui/fileicon_source.h"
+
+#include "base/gfx/png_encoder.h"
+#include "base/string_util.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/common/time_format.h"
+
+#include "generated_resources.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,
+                                      int request_id) {
+  IconManager* im = g_browser_process->icon_manager();
+
+  // Fast look up.
+  SkBitmap* icon = im->LookupIcon(UTF8ToWide(path), IconLoader::NORMAL);
+
+  if (icon) {
+    std::vector<unsigned char> png_bytes;
+    PNGEncoder::EncodeBGRASkBitmap(*icon, false, &png_bytes);
+
+    scoped_refptr<RefCountedBytes> icon_data = new RefCountedBytes(png_bytes);
+    SendResponse(request_id, icon_data);
+  } else {
+    // Icon was not in cache, go fetch it slowly.
+    IconManager::Handle h = im->LoadIcon(UTF8ToWide(path), IconLoader::NORMAL,
+        &cancelable_consumer_,
+        NewCallback(this, &FileIconSource::OnFileIconDataAvailable));
+
+    // Attach the ChromeURLDataManager request ID to the history request.
+    cancelable_consumer_.SetClientData(im, h, request_id);
+  }
+}
+
+void FileIconSource::OnFileIconDataAvailable(IconManager::Handle handle,
+                                             SkBitmap* icon) {
+  IconManager* im = g_browser_process->icon_manager();
+  int request_id = cancelable_consumer_.GetClientData(im, handle);
+
+  if (icon) {
+    std::vector<unsigned char> png_bytes;
+    PNGEncoder::EncodeBGRASkBitmap(*icon, false, &png_bytes);
+
+    scoped_refptr<RefCountedBytes> icon_data = new RefCountedBytes(png_bytes);
+    SendResponse(request_id, icon_data);
+  } else {
+    // TODO(glen): send a dummy icon.
+    SendResponse(request_id, NULL);
+  }
+}