Revert 281133 "chrome.hid: enrich model with report IDs"

trunk/src/chrome/browser/extensions/api/hid/hid_device_manager.cc

 // Copyright 2014 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/api/hid/hid_device_manager.h"
 
 #include <limits>
 #include <vector>
 
 #include "base/lazy_instance.h"
@@ skipping 25 matching lines @@
   HidService* hid_service = HidService::GetInstance();
   DCHECK(hid_service);
   base::ListValue* api_devices = new base::ListValue();
   for (ResourceIdToDeviceIdMap::const_iterator device_iter =
            device_ids_.begin();
        device_iter != device_ids_.end();
        ++device_iter) {
     int resource_id = device_iter->first;
     device::HidDeviceId device_id = device_iter->second;
     device::HidDeviceInfo device_info;
-
     if (hid_service->GetDeviceInfo(device_id, &device_info)) {
       if (device_info.vendor_id == vendor_id &&
-          device_info.product_id == product_id) {
+          device_info.product_id == product_id &&
+          IsDeviceAccessible(device_info)) {
         api::hid::HidDeviceInfo api_device_info;
         api_device_info.device_id = resource_id;
         api_device_info.vendor_id = device_info.vendor_id;
         api_device_info.product_id = device_info.product_id;
-        api_device_info.max_input_report_size =
-            device_info.max_input_report_size;
-        api_device_info.max_output_report_size =
-            device_info.max_output_report_size;
-        api_device_info.max_feature_report_size =
-            device_info.max_feature_report_size;
-
-        for (std::vector<device::HidCollectionInfo>::const_iterator
-                 collections_iter = device_info.collections.begin();
-             collections_iter != device_info.collections.end();
-             ++collections_iter) {
-          device::HidCollectionInfo collection = *collections_iter;
-
-          // Don't expose sensitive data.
-          if (collection.usage.IsProtected()) {
-            continue;
-          }
-
-          api::hid::HidCollectionInfo* api_collection =
-              new api::hid::HidCollectionInfo();
-          api_collection->usage_page = collection.usage.usage_page;
-          api_collection->usage = collection.usage.usage;
-
-          api_collection->report_ids.resize(collection.report_ids.size());
-          std::copy(collection.report_ids.begin(),
-                    collection.report_ids.end(),
-                    api_collection->report_ids.begin());
-
-          api_device_info.collections.push_back(
-              make_linked_ptr(api_collection));
+        for (std::vector<device::HidUsageAndPage>::const_iterator usage_iter =
+                 device_info.usages.begin();
+             usage_iter != device_info.usages.end();
+             ++usage_iter) {
+          api::hid::HidUsageAndPage* usage_and_page =
+              new api::hid::HidUsageAndPage();
+          usage_and_page->usage_page = (*usage_iter).usage_page;
+          usage_and_page->usage = (*usage_iter).usage;
+          linked_ptr<api::hid::HidUsageAndPage> usage_and_page_ptr(
+              usage_and_page);
+          api_device_info.usages.push_back(usage_and_page_ptr);
         }
-
-        // Expose devices with which user can communicate.
-        if (api_device_info.collections.size() > 0)
-          api_devices->Append(api_device_info.ToValue().release());
+        api_devices->Append(api_device_info.ToValue().release());
       }
     }
   }
-
   return scoped_ptr<base::ListValue>(api_devices);
 }
 
 bool HidDeviceManager::GetDeviceInfo(int resource_id,
                                      device::HidDeviceInfo* device_info) {
   UpdateDevices();
   HidService* hid_service = HidService::GetInstance();
   DCHECK(hid_service);
 
   ResourceIdToDeviceIdMap::const_iterator device_iter =
@@ skipping 29 matching lines @@
       DCHECK_LT(next_resource_id_, std::numeric_limits<int>::max());
       new_id = next_resource_id_++;
     }
     new_resource_ids[device_info.device_id] = new_id;
     new_device_ids[new_id] = device_info.device_id;
   }
   device_ids_.swap(new_device_ids);
   resource_ids_.swap(new_resource_ids);
 }
 
+// static
+// TODO(rockot): Add some tests for this.
+bool HidDeviceManager::IsDeviceAccessible(
+    const device::HidDeviceInfo& device_info) {
+  for (std::vector<device::HidUsageAndPage>::const_iterator iter =
+           device_info.usages.begin();
+      iter != device_info.usages.end(); ++iter) {
+    if (!IsUsageAccessible(*iter)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+// static
+bool HidDeviceManager::IsUsageAccessible(
+    const HidUsageAndPage& usage_and_page) {
+  if (usage_and_page.usage_page == HidUsageAndPage::kPageKeyboard)
+    return false;
+
+  if (usage_and_page.usage_page != HidUsageAndPage::kPageGenericDesktop)
+    return true;
+
+  uint16_t usage = usage_and_page.usage;
+  if (usage == HidUsageAndPage::kGenericDesktopPointer ||
+      usage == HidUsageAndPage::kGenericDesktopMouse ||
+      usage == HidUsageAndPage::kGenericDesktopKeyboard ||
+      usage == HidUsageAndPage::kGenericDesktopKeypad) {
+    return false;
+  }
+
+  if (usage >= HidUsageAndPage::kGenericDesktopSystemControl &&
+      usage <= HidUsageAndPage::kGenericDesktopSystemWarmRestart) {
+    return false;
+  }
+
+  if (usage >= HidUsageAndPage::kGenericDesktopSystemDock &&
+      usage <= HidUsageAndPage::kGenericDesktopSystemDisplaySwap) {
+    return false;
+  }
+
+  return true;
+}
+
 }  // namespace extensions