Remember zoom on a per-host basis.
BUG=567
TEST=Visit a page, zoom in or out, then navigate to a different host. The new page should not be zoomed. Go back, or restart, or open a new tab and navigate to the old page, and it should be zoomed.
Review URL: http://codereview.chromium.org/437077
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@33886 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/host_zoom_map.cc b/chrome/browser/host_zoom_map.cc
new file mode 100644
index 0000000..2c6393ca
--- /dev/null
+++ b/chrome/browser/host_zoom_map.cc
@@ -0,0 +1,69 @@
+// 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/host_zoom_map.h"
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/profile.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/common/pref_service.h"
+
+HostZoomMap::HostZoomMap(Profile* profile) : profile_(profile) {
+ const DictionaryValue* host_zoom_dictionary =
+ profile_->GetPrefs()->GetDictionary(prefs::kPerHostZoomLevels);
+ // Careful: The returned value could be NULL if the pref has never been set.
+ if (host_zoom_dictionary != NULL) {
+ for (DictionaryValue::key_iterator i(host_zoom_dictionary->begin_keys());
+ i != host_zoom_dictionary->end_keys(); ++i) {
+ std::wstring wide_host(*i);
+ int zoom_level = 0;
+ bool success = host_zoom_dictionary->GetIntegerWithoutPathExpansion(
+ wide_host, &zoom_level);
+ DCHECK(success);
+ host_zoom_levels_[WideToUTF8(wide_host)] = zoom_level;
+ }
+ }
+}
+
+// static
+void HostZoomMap::RegisterUserPrefs(PrefService* prefs) {
+ prefs->RegisterDictionaryPref(prefs::kPerHostZoomLevels);
+}
+
+int HostZoomMap::GetZoomLevel(const std::string& host) const {
+ AutoLock auto_lock(lock_);
+ HostZoomLevels::const_iterator i(host_zoom_levels_.find(host));
+ return (i == host_zoom_levels_.end()) ? 0 : i->second;
+}
+
+void HostZoomMap::SetZoomLevel(const std::string& host, int level) {
+ DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
+ if (host.empty())
+ return;
+
+ {
+ AutoLock auto_lock(lock_);
+ if (level == 0)
+ host_zoom_levels_.erase(host);
+ else
+ host_zoom_levels_[host] = level;
+ }
+
+ // Persist new zoom level if we're not off the record.
+ if (!profile_->IsOffTheRecord()) {
+ DictionaryValue* host_zoom_dictionary =
+ profile_->GetPrefs()->GetMutableDictionary(prefs::kPerHostZoomLevels);
+ std::wstring wide_host(UTF8ToWide(host));
+ if (level == 0) {
+ host_zoom_dictionary->RemoveWithoutPathExpansion(wide_host, NULL);
+ } else {
+ host_zoom_dictionary->SetWithoutPathExpansion(wide_host,
+ Value::CreateIntegerValue(level));
+ }
+ }
+}
+
+HostZoomMap::~HostZoomMap() {
+}
