blob: 8c5a96f962c39eba0e8fe2f3a9385de72ccafa74 [file] [log] [blame]
/* Copyright (c) 2011 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.
*/
/**
* This file defines the <code>PPB_MouseLock</code> interface.
*/
label Chrome {
M16 = 1.0
};
/**
* The <code>PPB_MouseLock</code> interface is implemented by the browser.
* It provides a way of locking the target of mouse events to a single plugin
* instance and removing the cursor from view. This is a useful input mode for
* certain classes of applications, especially first person perspective 3D
* applications and 3D modelling software.
*/
interface PPB_MouseLock {
/**
* Requests the mouse to be locked. The browser will permit mouse lock only
* while the tab is in fullscreen mode.
*
* While the mouse is locked, the cursor is implicitly hidden from the user.
* Any movement of the mouse will generate a
* <code>PP_INPUTEVENT_TYPE_MOUSEMOVE</code>. The <code>GetPosition</code> of
* <code>PPB_MouseInputEvent</code> reports the last known mouse position just
* as mouse lock was entered; while the <code>GetMovement</code> provides
* relative movement information, which indicates what the change in position
* of the mouse would be had it not been locked.
*
* The browser may revoke mouse lock for reasons including but not limited to
* the user pressing the ESC key, the user activating another program via a
* reserved keystroke (e.g., ALT+TAB), or some other system event.
*
* @param[in] instance A <code>PP_Instance</code> identifying one instance
* of a module.
* @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
* completion.
*
* @return An int32_t containing an error code from <code>pp_errors.h</code>.
*/
int32_t LockMouse([in] PP_Instance instance,
[in] PP_CompletionCallback callback);
/**
* Causes the mouse to be unlocked, allowing it to track user movement again.
* This is an asynchronous operation. The plugin instance will be notified via
* the <code>PPP_MouseLock</code> interface when it has lost the mouse lock.
*
* @param[in] instance A <code>PP_Instance</code> identifying one instance
* of a module.
*/
void UnlockMouse([in] PP_Instance instance);
};