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// Copyright (c) 2010 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/extensions/extension_toolbar_model.h"
#include "chrome/browser/extensions/extension_prefs.h"
#include "chrome/browser/extensions/extensions_service.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/notification_service.h"
ExtensionToolbarModel::ExtensionToolbarModel(ExtensionsService* service)
: service_(service) {
DCHECK(service_);
registrar_.Add(this, NotificationType::EXTENSION_LOADED,
Source<Profile>(service_->profile()));
registrar_.Add(this, NotificationType::EXTENSION_UNLOADED,
Source<Profile>(service_->profile()));
registrar_.Add(this, NotificationType::EXTENSION_UNLOADED_DISABLED,
Source<Profile>(service_->profile()));
registrar_.Add(this, NotificationType::EXTENSIONS_READY,
Source<Profile>(service_->profile()));
}
ExtensionToolbarModel::~ExtensionToolbarModel() {
}
void ExtensionToolbarModel::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void ExtensionToolbarModel::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void ExtensionToolbarModel::MoveBrowserAction(Extension* extension,
int index) {
ExtensionList::iterator pos = std::find(begin(), end(), extension);
if (pos == end()) {
NOTREACHED();
return;
}
toolitems_.erase(pos);
int i = 0;
bool inserted = false;
for (ExtensionList::iterator iter = begin(); iter != end(); ++iter, ++i) {
if (i == index) {
toolitems_.insert(iter, extension);
inserted = true;
break;
}
}
if (!inserted) {
DCHECK_EQ(index, static_cast<int>(toolitems_.size()));
index = toolitems_.size();
toolitems_.push_back(extension);
}
FOR_EACH_OBSERVER(Observer, observers_, BrowserActionMoved(extension, index));
UpdatePrefs();
}
void ExtensionToolbarModel::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == NotificationType::EXTENSIONS_READY) {
InitializeExtensionList();
return;
}
if (!service_->is_ready())
return;
Extension* extension = Details<Extension>(details).ptr();
if (type == NotificationType::EXTENSION_LOADED) {
AddExtension(extension);
} else if (type == NotificationType::EXTENSION_UNLOADED ||
type == NotificationType::EXTENSION_UNLOADED_DISABLED) {
RemoveExtension(extension);
} else {
NOTREACHED() << "Received unexpected notification";
}
}
void ExtensionToolbarModel::AddExtension(Extension* extension) {
// We only care about extensions with browser actions.
if (!extension->browser_action())
return;
if (extension->id() == last_extension_removed_ &&
last_extension_removed_index_ < toolitems_.size()) {
toolitems_.insert(begin() + last_extension_removed_index_, extension);
FOR_EACH_OBSERVER(Observer, observers_,
BrowserActionAdded(extension, last_extension_removed_index_));
} else {
toolitems_.push_back(extension);
FOR_EACH_OBSERVER(Observer, observers_,
BrowserActionAdded(extension, toolitems_.size() - 1));
}
last_extension_removed_ = "";
last_extension_removed_index_ = -1;
UpdatePrefs();
}
void ExtensionToolbarModel::RemoveExtension(Extension* extension) {
ExtensionList::iterator pos = std::find(begin(), end(), extension);
if (pos == end()) {
return;
}
last_extension_removed_ = extension->id();
last_extension_removed_index_ = pos - begin();
toolitems_.erase(pos);
FOR_EACH_OBSERVER(Observer, observers_,
BrowserActionRemoved(extension));
UpdatePrefs();
}
// Combine the currently enabled extensions that have browser actions (which
// we get from the ExtensionsService) with the ordering we get from the
// pref service. For robustness we use a somewhat inefficient process:
// 1. Create a vector of extensions sorted by their pref values. This vector may
// have holes.
// 2. Create a vector of extensions that did not have a pref value.
// 3. Remove holes from the sorted vector and append the unsorted vector.
void ExtensionToolbarModel::InitializeExtensionList() {
DCHECK(service_->is_ready());
std::vector<std::string> pref_order = service_->extension_prefs()->
GetToolbarOrder();
// Items that have a pref for their position.
ExtensionList sorted;
sorted.resize(pref_order.size(), NULL);
// The items that don't have a pref for their position.
ExtensionList unsorted;
// Create the lists.
for (size_t i = 0; i < service_->extensions()->size(); ++i) {
Extension* extension = service_->extensions()->at(i);
if (!extension->browser_action())
continue;
std::vector<std::string>::iterator pos =
std::find(pref_order.begin(), pref_order.end(), extension->id());
if (pos != pref_order.end()) {
int index = std::distance(pref_order.begin(), pos);
sorted[index] = extension;
} else {
unsorted.push_back(extension);
}
}
// Merge the lists.
toolitems_.reserve(sorted.size() + unsorted.size());
for (ExtensionList::iterator iter = sorted.begin();
iter != sorted.end(); ++iter) {
if (*iter != NULL)
toolitems_.push_back(*iter);
}
toolitems_.insert(toolitems_.end(), unsorted.begin(), unsorted.end());
// Inform observers.
for (size_t i = 0; i < toolitems_.size(); i++) {
FOR_EACH_OBSERVER(Observer, observers_,
BrowserActionAdded(toolitems_[i], i));
}
UpdatePrefs();
}
void ExtensionToolbarModel::UpdatePrefs() {
if (!service_->extension_prefs())
return;
std::vector<std::string> ids;
ids.reserve(toolitems_.size());
for (ExtensionList::iterator iter = begin(); iter != end(); ++iter)
ids.push_back((*iter)->id());
service_->extension_prefs()->SetToolbarOrder(ids);
}
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