Merge Chromium src@r53293

Change-Id: Ia79acf8670f385cee48c45b0a75371d8e950af34

1 files changed, 109 insertions, 0 deletions

diff --git a/chrome/browser/dom_ui/dom_ui_theme_source.cc b/chrome/browser/dom_ui/dom_ui_theme_source.cc
new file mode 100644
index 0000000..f34091e
--- /dev/null
+++ b/chrome/browser/dom_ui/dom_ui_theme_source.cc
@@ -0,0 +1,109 @@
+// Copyright (c) 2009 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/dom_ui_theme_source.h"
+
+#include "app/resource_bundle.h"
+#include "app/theme_provider.h"
+#include "base/message_loop.h"
+#include "chrome/browser/browser_theme_provider.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/dom_ui/ntp_resource_cache.h"
+#include "chrome/browser/profile.h"
+#include "chrome/browser/resources_util.h"
+#include "chrome/common/url_constants.h"
+#include "googleurl/src/gurl.h"
+
+// use a resource map rather than hard-coded strings.
+static const char* kNewTabCSSPath = "css/newtab.css";
+static const char* kNewIncognitoTabCSSPath = "css/newincognitotab.css";
+
+static std::string StripQueryParams(const std::string& path) {
+  GURL path_url = GURL(std::string(chrome::kChromeUIScheme) + "://" +
+                       std::string(chrome::kChromeUIThemePath) + "/" + path);
+  return path_url.path().substr(1);  // path() always includes a leading '/'.
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DOMUIThemeSource, public:
+
+DOMUIThemeSource::DOMUIThemeSource(Profile* profile)
+    : DataSource(chrome::kChromeUIThemePath, MessageLoop::current()),
+      profile_(profile->GetOriginalProfile()) {
+  css_bytes_ = profile_->GetNTPResourceCache()->GetNewTabCSS(
+      profile->IsOffTheRecord());
+}
+
+void DOMUIThemeSource::StartDataRequest(const std::string& path,
+                                        bool is_off_the_record,
+                                        int request_id) {
+  // Our path may include cachebuster arguments, so trim them off.
+  std::string uncached_path = StripQueryParams(path);
+
+  if (uncached_path == kNewTabCSSPath ||
+      uncached_path == kNewIncognitoTabCSSPath) {
+    DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
+    DCHECK((uncached_path == kNewTabCSSPath && !is_off_the_record) ||
+           (uncached_path == kNewIncognitoTabCSSPath && is_off_the_record));
+
+    SendResponse(request_id, css_bytes_);
+    return;
+  } else {
+    int resource_id = ResourcesUtil::GetThemeResourceId(uncached_path);
+    if (resource_id != -1) {
+      SendThemeBitmap(request_id, resource_id);
+      return;
+    }
+  }
+  // We don't have any data to send back.
+  SendResponse(request_id, NULL);
+}
+
+std::string DOMUIThemeSource::GetMimeType(const std::string& path) const {
+  std::string uncached_path = StripQueryParams(path);
+
+  if (uncached_path == kNewTabCSSPath ||
+      uncached_path == kNewIncognitoTabCSSPath) {
+    return "text/css";
+  }
+
+  return "image/png";
+}
+
+MessageLoop* DOMUIThemeSource::MessageLoopForRequestPath(
+    const std::string& path) const {
+  std::string uncached_path = StripQueryParams(path);
+
+  if (uncached_path == kNewTabCSSPath ||
+      uncached_path == kNewIncognitoTabCSSPath) {
+    // We generated and cached this when we initialized the object.  We don't
+    // have to go back to the UI thread to send the data.
+    return NULL;
+  }
+
+  // If it's not a themeable image, we don't need to go to the UI thread.
+  int resource_id = ResourcesUtil::GetThemeResourceId(uncached_path);
+  if (!BrowserThemeProvider::IsThemeableImage(resource_id))
+    return NULL;
+
+  return DataSource::MessageLoopForRequestPath(path);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DOMUIThemeSource, private:
+
+void DOMUIThemeSource::SendThemeBitmap(int request_id, int resource_id) {
+  if (BrowserThemeProvider::IsThemeableImage(resource_id)) {
+    DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
+    ThemeProvider* tp = profile_->GetThemeProvider();
+    DCHECK(tp);
+
+    scoped_refptr<RefCountedMemory> image_data(tp->GetRawData(resource_id));
+    SendResponse(request_id, image_data);
+  } else {
+    DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
+    const ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+    SendResponse(request_id, rb.LoadDataResourceBytes(resource_id));
+  }
+}