Site specific secondary tiles for Windows 8.

chrome/browser/ui/metro_pin_tab_helper.cc

-// 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/metro_pin_tab_helper.h"
-
-#include "base/logging.h"
-#include "base/utf_string_conversions.h"
-#include "content/public/browser/web_contents.h"
-
-#if defined(OS_WIN)
-#include "base/win/metro.h"
-#endif
-
-DEFINE_WEB_CONTENTS_USER_DATA_KEY(MetroPinTabHelper)
-
-MetroPinTabHelper::MetroPinTabHelper(content::WebContents* web_contents)
-    : content::WebContentsObserver(web_contents),
-      is_pinned_(false) {}
-
-MetroPinTabHelper::~MetroPinTabHelper() {}
-
-void MetroPinTabHelper::TogglePinnedToStartScreen() {
-#if defined(OS_WIN)
-  HMODULE metro_module = base::win::GetMetroModule();
-  if (metro_module) {
-    typedef void (*MetroTogglePinnedToStartScreen)(const string16&,
-        const string16&);
-    MetroTogglePinnedToStartScreen metro_toggle_pinned_to_start_screen =
-        reinterpret_cast<MetroTogglePinnedToStartScreen>(
-            ::GetProcAddress(metro_module, "MetroTogglePinnedToStartScreen"));
-    if (!metro_toggle_pinned_to_start_screen) {
-      NOTREACHED();
-      return;
-    }
-
-    GURL url = web_contents()->GetURL();
-    string16 title = web_contents()->GetTitle();
-    VLOG(1) << __FUNCTION__ << " calling pin with title: " << title
-            << " and url " << UTF8ToUTF16(url.spec());
-    metro_toggle_pinned_to_start_screen(title, UTF8ToUTF16(url.spec()));
-    // TODO(benwells): This will update the state incorrectly if the user
-    // cancels. To fix this some sort of callback needs to be introduced as
-    // the pinning happens on another thread.
-    is_pinned_ = !is_pinned_;
-    return;
-  }
-#endif
-}
-
-void MetroPinTabHelper::DidNavigateMainFrame(
-    const content::LoadCommittedDetails& /*details*/,
-    const content::FrameNavigateParams& /*params*/) {
-  UpdatePinnedStateForCurrentURL();
-}
-
-void MetroPinTabHelper::UpdatePinnedStateForCurrentURL() {
-#if defined(OS_WIN)
-  HMODULE metro_module = base::win::GetMetroModule();
-  if (metro_module) {
-    typedef BOOL (*MetroIsPinnedToStartScreen)(const string16&);
-    MetroIsPinnedToStartScreen metro_is_pinned_to_start_screen =
-        reinterpret_cast<MetroIsPinnedToStartScreen>(
-            ::GetProcAddress(metro_module, "MetroIsPinnedToStartScreen"));
-    if (!metro_is_pinned_to_start_screen) {
-      NOTREACHED();
-      return;
-    }
-
-    GURL url = web_contents()->GetURL();
-    is_pinned_ = metro_is_pinned_to_start_screen(UTF8ToUTF16(url.spec())) != 0;
-    VLOG(1) << __FUNCTION__ << " with url " << UTF8ToUTF16(url.spec())
-            << " result: " << is_pinned_;
-  }
-#endif
-}