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| author | sadrul@chromium.org <sadrul@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-10-17 20:30:14 +0000 |
|---|---|---|
| committer | sadrul@chromium.org <sadrul@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-10-17 20:30:14 +0000 |
| commit | c02c059cb0e72fb303bf19fb18380ae704a26854 (patch) | |
| tree | 25a16b268c5c53f8adeafd9aedaaea4ee02f843c /content/browser/renderer_host/touch_event_queue.h | |
| parent | d9bc2a7f086f36af6cea1e1d2593a67fd2487537 (diff) | |
| download | chromium_src-c02c059cb0e72fb303bf19fb18380ae704a26854.zip chromium_src-c02c059cb0e72fb303bf19fb18380ae704a26854.tar.gz chromium_src-c02c059cb0e72fb303bf19fb18380ae704a26854.tar.bz2 | |
touch-event queue: Add a touch-event queue for all platforms.
This touch-event queue will allow removing the touch-event queue in the
ui::gesture-recognizer, and asynchronous event processing (ui::ER_ASYNC) in
ui::event-dispatcher. This queue will also allow throttling/coalescing touch
events across all platforms.
BUG=138153, 110231
TBR=avi@chromium.org (for .gypi and content/port)
Review URL: https://codereview.chromium.org/11148008
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162510 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'content/browser/renderer_host/touch_event_queue.h')
| -rw-r--r-- | content/browser/renderer_host/touch_event_queue.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/content/browser/renderer_host/touch_event_queue.h b/content/browser/renderer_host/touch_event_queue.h new file mode 100644 index 0000000..2301fbd --- /dev/null +++ b/content/browser/renderer_host/touch_event_queue.h @@ -0,0 +1,46 @@ +// 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. + +#ifndef CONTENT_BROWSER_RENDERER_HOST_TOUCH_EVENT_QUEUE_H_ +#define CONTENT_BROWSER_RENDERER_HOST_TOUCH_EVENT_QUEUE_H_ + +#include <deque> + +#include "base/basictypes.h" +#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h" + +namespace content { + +class RenderWidgetHostImpl; + +// A queue for throttling and coalescing touch-events. +class TouchEventQueue { + public: + explicit TouchEventQueue(RenderWidgetHostImpl* host); + virtual ~TouchEventQueue(); + + // Adds an event to the queue. The event may be coalesced with previously + // queued events (e.g. consecutive touch-move events can be coalesced into a + // single touch-move event). The event may also be immediately forwarded to + // the renderer (e.g. when there are no other queued touch event). + void QueueEvent(const WebKit::WebTouchEvent& event); + + // Notifies the queue that a touch-event has been processed by the renderer. + // At this point, the queue may send one or more gesture events and/or + // additional queued touch-events to the renderer. + void ProcessTouchAck(bool processed); + + private: + // The RenderWidgetHost that owns this event-queue. + RenderWidgetHostImpl* render_widget_host_; + + typedef std::deque<WebKit::WebTouchEvent> TouchQueue; + TouchQueue touch_queue_; + + DISALLOW_COPY_AND_ASSIGN(TouchEventQueue); +}; + +} // namespace content + +#endif // CONTENT_BROWSER_RENDERER_HOST_TOUCH_EVENT_QUEUE_H_ |