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Side by Side Diff: chrome/browser/sync/sync_js_controller.cc

Issue 9699057: [Sync] Move 'sync' target to sync/ (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Address Tim's comments Created 8 years, 9 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/sync/sync_js_controller.h"
6
7 #include "base/location.h"
8 #include "chrome/browser/sync/js/js_backend.h"
9 #include "chrome/browser/sync/js/js_event_details.h"
10
11 namespace browser_sync {
12
13 SyncJsController::PendingJsMessage::PendingJsMessage(
14 const std::string& name, const JsArgList& args,
15 const WeakHandle<JsReplyHandler>& reply_handler)
16 : name(name), args(args), reply_handler(reply_handler) {}
17
18 SyncJsController::PendingJsMessage::~PendingJsMessage() {}
19
20 SyncJsController::SyncJsController() {}
21
22 SyncJsController::~SyncJsController() {
23 AttachJsBackend(WeakHandle<JsBackend>());
24 }
25
26 void SyncJsController::AddJsEventHandler(JsEventHandler* event_handler) {
27 js_event_handlers_.AddObserver(event_handler);
28 UpdateBackendEventHandler();
29 }
30
31 void SyncJsController::RemoveJsEventHandler(JsEventHandler* event_handler) {
32 js_event_handlers_.RemoveObserver(event_handler);
33 UpdateBackendEventHandler();
34 }
35
36 void SyncJsController::AttachJsBackend(
37 const WeakHandle<JsBackend>& js_backend) {
38 js_backend_ = js_backend;
39 UpdateBackendEventHandler();
40
41 if (js_backend_.IsInitialized()) {
42 // Process any queued messages.
43 for (PendingJsMessageList::const_iterator it =
44 pending_js_messages_.begin();
45 it != pending_js_messages_.end(); ++it) {
46 js_backend_.Call(FROM_HERE, &JsBackend::ProcessJsMessage,
47 it->name, it->args, it->reply_handler);
48 }
49 }
50 }
51
52 void SyncJsController::ProcessJsMessage(
53 const std::string& name, const JsArgList& args,
54 const WeakHandle<JsReplyHandler>& reply_handler) {
55 if (js_backend_.IsInitialized()) {
56 js_backend_.Call(FROM_HERE, &JsBackend::ProcessJsMessage,
57 name, args, reply_handler);
58 } else {
59 pending_js_messages_.push_back(
60 PendingJsMessage(name, args, reply_handler));
61 }
62 }
63
64 void SyncJsController::HandleJsEvent(const std::string& name,
65 const JsEventDetails& details) {
66 FOR_EACH_OBSERVER(JsEventHandler, js_event_handlers_,
67 HandleJsEvent(name, details));
68 }
69
70 void SyncJsController::UpdateBackendEventHandler() {
71 if (js_backend_.IsInitialized()) {
72 // To avoid making the backend send useless events, we clear the
73 // event handler we pass to it if we don't have any event
74 // handlers.
75 WeakHandle<JsEventHandler> backend_event_handler =
76 (js_event_handlers_.size() > 0) ?
77 MakeWeakHandle(AsWeakPtr()) : WeakHandle<SyncJsController>();
78 js_backend_.Call(FROM_HERE, &JsBackend::SetJsEventHandler,
79 backend_event_handler);
80 }
81 }
82
83 } // namespace browser_sync
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