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</style></head><body><div class="article"><div class="titlepage"><div><div><h2 class="title"><a id="xtest1"></a>X11 INPUT SYNTHESIS EXTENSION PROPOSAL</h2></div><div><h3 class="subtitle"><em>X Consortium Standard</em></h3></div><div><div class="authorgroup"><div class="author"><h3 class="author"><span class="firstname">Larry</span> <span class="surname">Woestman</span></h3><div class="affiliation"><span class="jobtitle">Member of Technical Staff<br /></span><span class="orgname">Hewlett Packard<br /></span></div></div></div></div><div><p class="releaseinfo">Version 1.0</p></div><div><p class="copyright">Copyright © 1993 X Consortium</p></div><div><div class="legalnotice"><a id="idp33012380"></a><p>
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
</p><p>
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
</p><p>
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X
CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
</p><p>
Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings in
this Software without prior written authorization from the X Consortium.
</p><p>X Window System is a trademark of The Open Group.</p></div></div><div><div class="abstract"><p>
This is a proposal for an extension to the X11 server and Xlib.
</p></div></div></div><hr /></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="#introduction">Introduction</a></span></dt><dt><span class="sect1"><a href="#conventions_used_in_this_document">Conventions Used In This Document</a></span></dt><dt><span class="sect1"><a href="#definition_of_terms">Definition Of Terms</a></span></dt><dd><dl><dt><span class="sect2"><a href="#input_actions">Input Actions</a></span></dt><dt><span class="sect2"><a href="#user_input_actions">User Input Actions</a></span></dt></dl></dd><dt><span class="sect1"><a href="#what_does_this_extension_do">What Does This Extension Do?</a></span></dt><dt><span class="sect1"><a href="#functions_in_this_extension">Functions In This Extension</a></span></dt><dd><dl><dt><span class="sect2"><a href="#high_level_functions">High Level Functions</a></span></dt><dt><span class="sect2"><a href="#low_level_functions">Low Level Functions</a></span></dt></dl></dd></dl></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="introduction"></a>Introduction</h2></div></div></div><p>
This is a proposal for an extension to the X11 server and Xlib.
It provides two capabilities:
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
It allows a client to generate user input actions in the server without
requiring a user to be present.
    </p></li><li class="listitem"><p>
It also allows a client to control the
handling of user input actions by the server.
    </p></li></ul></div><p>
The capability
to allow a client to generate user input actions in the server
will be used by some of the X Testing Consortium Xlib tests.
Both capabilities will be used by the X Testing Consortium client exerciser
program.
These capabilities may also be useful in other programs.
</p><p>
This extension requires modification to device-dependent code in the
server.  Therefore it is not a 'portable' extension as defined by the
X11 Server Extensions document.  However, the majority of the code
and functionality of this extension will be implementation-independent.
</p></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="conventions_used_in_this_document"></a>Conventions Used In This Document</h2></div></div></div><p>
The naming conventions used in the Xlib documentation are followed
with these additions:
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
The names of all functions defined in this extension begin with 'XTest',
with the first letter of each additional word capitalized.
    </p></li><li class="listitem"><p>
The names of the protocol request structures follow the Xlib convention
of 'x&lt;name&gt;Req'.
    </p></li><li class="listitem"><p>
The names of the protocol request minor type codes follow the Xlib convention
of 'X_&lt;name&gt;'.
    </p></li><li class="listitem"><p>
The names of all other constants defined in this extension begin with 'XTest',
with the rest of the name in upper case letters.
    </p></li><li class="listitem"><p>
All constants and structures defined in this extension will have their
values specified in the 'xtestext1.h' file (listed in section 5).
    </p></li></ul></div></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="definition_of_terms"></a>Definition Of Terms</h2></div></div></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a id="input_actions"></a>Input Actions</h3></div></div></div><p>
Input actions are pointer movements, button presses and releases,
and key presses and releases.  They can be generated by a user or by a client
(using functions in this extension).
</p></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a id="user_input_actions"></a>User Input Actions</h3></div></div></div><p>
User input actions are input actions that are generated by the user
moving a pointing device (typically a mouse), pressing and releasing buttons on
the pointing device, and pressing and releasing keys on the keyboard.
</p></div></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="what_does_this_extension_do"></a>What Does This Extension Do?</h2></div></div></div><p>
Without this extension, user input actions are processed by the server,
and are converted into normal X events that are sent to the
appropriate client or clients.
</p><p>
This extension adds the following capabilities:
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
Input actions may be sent from a client to the server to be
processed just as if the user had physically performed them.
The input actions are provided to the server in the form of X protocol
requests defined by this extension.
The information provided to the server includes what action should be
performed, and how long to delay before processing the action in the server.
    </p></li><li class="listitem"><p>
User input actions may be diverted to a client before being processed by the
server.
The effect on the server is as if the user had performed no input action.
The user input actions are provided to the client in the form of X events
defined by this extension.
The information provided to the client includes what user input action
occurred and the delay between this user input action and the previous user
input action.
The client may then do anything it wishes with this information.
    </p></li><li class="listitem"><p>
User input actions may be copied, with one copy going to the server in the
normal way, and the other copy being sent to a client as described above.
    </p></li></ul></div></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="functions_in_this_extension"></a>Functions In This Extension</h2></div></div></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a id="high_level_functions"></a>High Level Functions</h3></div></div></div><p>
These functions are built on top of the low level functions described later.
</p><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestmovepointer"></a>XTestMovePointer</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestMovePointer</strong>(</code>Display <var class="pdparam">*display</var>, int <var class="pdparam">device_id</var>, unsigned long <var class="pdparam">delay</var>, int <var class="pdparam">x</var>, int <var class="pdparam">y</var>, unsigned int <var class="pdparam">count</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr><tr><td><p><span class="term">device_id</span></p></td><td><p>
Specifies which pointer device was supposed to have caused the input action.
This is a provision for future support of multiple (distinguishable) pointer
devices, and should always be set to 0 for now.
      </p></td></tr><tr><td><p><span class="term">delay</span></p></td><td><p>
Specifies the time (in milliseconds) to wait before each movement
of the pointer.
      </p></td></tr><tr><td><p><span class="term">x, y</span></p></td><td><p>
Specifies the x and y coordinates to move the pointer to relative to the
root window for the specified display.
      </p></td></tr><tr><td><p><span class="term">count</span></p></td><td><p>
Specifies the number of 'delay, x, y' triplets contained in the
<span class="emphasis"><em>delay</em></span>,
<span class="emphasis"><em>x</em></span> and
<span class="emphasis"><em>y</em></span> arrays.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestMovePointer</code>
function creates input actions to be sent to the the server.
The input actions will be accumulated in a request defined by this extension
until the request is full or the XTestFlush function is called.
They will then be sent to the server.
When the input actions are sent to the server, the input actions will cause
the server to think that the pointer was moved to the specified position(s),
with the specified delay before each input action.
</p><p>
The
<code class="function">XTestMovePointer</code>
function will return -1 if there is an error, and 0 otherwise.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestpressbutton"></a>XTestPressButton</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestPressButton</strong>(</code>Display <var class="pdparam">*display</var>, int <var class="pdparam">device_id</var>, unsigned long <var class="pdparam">delay</var>, unsigned int <var class="pdparam">button_number</var>, unsigned int <var class="pdparam">button_action</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr><tr><td><p><span class="term">device_id</span></p></td><td><p>
Specifies which button device was supposed to have caused the input action.
This is a provision for future support of multiple (distinguishable) button
devices, and should always be set to 0 for now.
      </p></td></tr><tr><td><p><span class="term">delay</span></p></td><td><p>
Specifies the time (in milliseconds) to wait before the input action.
      </p></td></tr><tr><td><p><span class="term">button_number</span></p></td><td><p>
Specifies which button is being acted upon.
      </p></td></tr><tr><td><p><span class="term">button_action</span></p></td><td><p>
Specifies the action to be performed (one of
<span class="emphasis"><em>XTestPRESS</em></span>,
<span class="emphasis"><em>XTestRELEASE</em></span>, or
<span class="emphasis"><em>XTestSTROKE</em></span>).
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestPressButton</code>
function creates input actions to be sent to the the server.
The input actions will be accumulated in a request defined by this extension
until the request is full or the XTestFlush function is called.
They will then be sent to the server.
When the input actions are sent to the server, the input actions will cause
the server to think that the specified button was moved as specified.
</p><p>
The
<code class="function">XTestPressButton</code>
function will return -1 if there is an error, and 0 otherwise.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestpresskey"></a>XTestPressKey</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestPressKey</strong>(</code>Display <var class="pdparam">*display</var>, int <var class="pdparam">device_id</var>, unsigned long <var class="pdparam">delay</var>, unsigned int <var class="pdparam">keycode</var>, unsigned int <var class="pdparam">key_action</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr><tr><td><p><span class="term">device_id</span></p></td><td><p>
Specifies which keyboard device was supposed to have caused the input action.
This is a provision for future support of multiple (distinguishable) keyboard
devices, and should always be set to 0 for now.
      </p></td></tr><tr><td><p><span class="term">delay</span></p></td><td><p>
Specifies the time (in milliseconds) to wait before the input action.
      </p></td></tr><tr><td><p><span class="term">keycode</span></p></td><td><p>
Specifies which keycode is being acted upon.
      </p></td></tr><tr><td><p><span class="term">key_action</span></p></td><td><p>
Specifies the action to be performed (one of
<span class="emphasis"><em>XTestPRESS</em></span>,
<span class="emphasis"><em>XTestRELEASE</em></span>, or
<span class="emphasis"><em>XTestSTROKE</em></span>).
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestPressKey</code>
function creates input actions to be sent to the the server.
The input actions will be accumulated in a request defined by this extension
until the request is full or the XTestFlush function is called.
They will then be sent to the server.
When the input actions are sent to the server, the input actions will cause
the server to think that the specified key on the keyboard was moved as
specified.
</p><p>
The
<code class="function">XTestPressKey</code>
function will return -1 if there is an error, and 0 otherwise.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestflush"></a>XTestFlush</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestFlush</strong>(</code>Display <var class="pdparam">*display</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestFlush</code>
will send any remaining input actions to the server.
</p><p>
The
<code class="function">XTestFlush</code>
function will return -1 if there is an error, and 0 otherwise.
</p></div></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a id="low_level_functions"></a>Low Level Functions</h3></div></div></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestgetinput"></a>XTestGetInput</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestGetInput</strong>(</code>Display <var class="pdparam">*display</var>, int <var class="pdparam">action_handling</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr><tr><td><p><span class="term">action_handling</span></p></td><td><p>
Specifies to the server what to do with the user input actions.  (one of
0, <span class="emphasis"><em>XTestPACKED_MOTION</em></span> or
<span class="emphasis"><em>XTestPACKED_ACTIONS</em></span>; optionally 'or'ed
with <span class="emphasis"><em>XTestEXCLUSIVE</em></span>).
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestGetInput</code>
function tells the server to begin putting information about user input actions
into events to be sent to the client that called this function.  These events
can be read via the Xlib <code class="function">XNextEvent</code>fR function.
</p><p>
The server assigns an event type of
<span class="emphasis"><em>XTestInputActionType</em></span> to these events
to distinguish them from other events.
Since the actual value of the event type may vary depending on how many
extensions are included with an X11 implementation,
<span class="emphasis"><em>XTestInputActionType</em></span> is a variable that will be
contained in the Xlib
part of this extension.  It may be referenced as follows:
</p><p>
extern int XTestInputActionType;
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
An <span class="emphasis"><em>action_handling</em></span> value of 0 causes the server
to send one user input action in each
<span class="emphasis"><em>XTestInputActionType</em></span> event.
This can sometimes cause performance problems.
    </p></li><li class="listitem"><p>
An <span class="emphasis"><em>action_handling</em></span> value of
<span class="emphasis"><em>XTestPACKED_ACTIONS</em></span> causes the server
to pack as many user input actions as possible into a
<span class="emphasis"><em>XTestInputActionType</em></span> event.
This is needed if user input actions are happening rapidly (such as
when the user moves the pointer) to keep performance at a reasonable level.
    </p></li><li class="listitem"><p>
An <span class="emphasis"><em>action_handling</em></span> value of
<span class="emphasis"><em>XTestPACKED_MOTION</em></span> causes the server
to pack only user input actions associated with moving the pointer.
This allows the
client to receive button and key motions as they happen without waiting for the
event to fill up, while still keeping performance at a reasonable level.
    </p></li><li class="listitem"><p>
An <span class="emphasis"><em>action_handling</em></span> value with
<span class="emphasis"><em>XTestEXCLUSIVE</em></span> 'or'ed in
causes the server to send user input actions only to the client.
The effect on the server is as if the user had performed no input actions.
    </p></li><li class="listitem"><p>
An <span class="emphasis"><em>action_handling</em></span> value without
<span class="emphasis"><em>XTestEXCLUSIVE</em></span>
causes the server to copy user input actions, sending one copy to the
client, and handling the other copy normally (as it would if this extension
were not installed).
    </p></li></ul></div><p>
There are four types of input actions that are passed from the server
to the client.  They are:
</p><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">key/button~state~change</span></p></td><td><p>
This type of input action contains the keycode of the key or button that
changed state;
whether the key or button is up or down,
and the time delay between this input action and the previous input action.
      </p></td></tr><tr><td><p><span class="term">pointer~motions</span></p></td><td><p>
This type of input action contains information about the motion of the
pointer when the pointer has only moved a short distance.
If the pointer has moved a long distance,
the pointer jump input action is used.
      </p></td></tr><tr><td><p><span class="term">pointer~jumps</span></p></td><td><p>
This type of input action contains information about the motion of the
pointer when the pointer has moved a long distance.
      </p></td></tr><tr><td><p><span class="term">delays</span></p></td><td><p>
This type of input action is used when the delay between input actions is too
large to be held in the other input actions.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestGetInput</code>
function will return -1 if there is an error, and 0 otherwise.
</p><p>
An error code of <span class="emphasis"><em>BadAccess</em></span> means that another client
has already requested that user input actions be sent to it.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xteststopinput"></a>XTestStopInput</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestStopInput</strong>(</code>Display <var class="pdparam">*display</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestStopInput</code>
function tells the server to stop putting information about user input actions
into events.
The server will process user input actions normally (as it would
if this extension were not in the server).
</p><p>
The
<code class="function">XTestStopInput</code>
function will return -1 if there is an error, and 0 otherwise.
</p><p>
An error code of <span class="emphasis"><em>BadAccess</em></span> means that a request
was made to stop input when input has never been started.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestfakeinput"></a>XTestFakeInput</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestFakeInput</strong>(</code>Display <var class="pdparam">*display</var>, char <var class="pdparam">*action_list_addr</var>, int <var class="pdparam">action_list_size</var>, int <var class="pdparam">ack_flag</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr><tr><td><p><span class="term">action_list_addr</span></p></td><td><p>
Specifies the address of an list of input actions to be sent to the server.
      </p></td></tr><tr><td><p><span class="term">action_list_size</span></p></td><td><p>
Specifies the size (in bytes) of the list of input actions.
It may be no larger than <span class="emphasis"><em>XTestMAX_ACTION_LIST_SIZE</em></span> bytes.
      </p></td></tr><tr><td><p><span class="term">ack_flag</span></p></td><td><p>
Specifies whether the server needs to send an event to indicate that its
input action buffer is empty (one of
<span class="emphasis"><em>XTestFAKE_ACK_NOT_NEEDED</em></span> or
<span class="emphasis"><em>XTestFAKE_ACK_REQUEST</em></span>).
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestFakeInput</code>
function tells the server to take the specified user input actions and process
them as if the user had physically performed them.
</p><p>
The server can only accept a limited number of input actions at one
time.  This limit can be determined by the
<code class="function">XTestQueryInputSize</code> function
in this extension.
</p><p>
The client should set <span class="emphasis"><em>ack_flag</em></span> to
<span class="emphasis"><em>XTestFAKE_ACK_NOT_NEEDED</em></span>
on calls to <span class="emphasis"><em>XTestFakeInput</em></span> that do not reach this limit.
</p><p>
The client should set <span class="emphasis"><em>ack_flag</em></span> to
<span class="emphasis"><em>XTestFAKE_ACK_REQUEST</em></span>
on the call to <span class="emphasis"><em>XTestFakeInput</em></span> that reaches this limit.
</p><p>
When the server sees an <span class="emphasis"><em>ack_flag</em></span> value of
<span class="emphasis"><em>XTestFAKE_ACK_REQUEST</em></span>
it finishes processing its input action buffer, then sends an event with
type <span class="emphasis"><em>XTestFakeAckType</em></span> to the client.
When the client reads this event, it knows that it is safe to resume
sending input actions to the server.
</p><p>
Since the actual value of the event type may vary depending on how many
extensions are included with an X11 implementation,
<span class="emphasis"><em>XTestFakeAckType</em></span> is a variable that is contained
in the Xlib part of this extension.  It may be referenced as follows:
</p><p>
extern int XTestFakeAckType;
</p><p>
There are four types of input actions that are passed from the client
to the server.  They are:
</p><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">key/button~state~change</span></p></td><td><p>
This type of input action contains the keycode of the key or button that
is to change state;
whether the key or button is to be up or down,
and the time to delay before changing the state of the key or button.
      </p></td></tr><tr><td><p><span class="term">pointer~motions</span></p></td><td><p>
This type of input action contains information about the motion of the
pointer when the pointer is to be moved a short distance,
and the time to delay before moving the pointer.
If the pointer is to be moved a long distance,
the pointer jump input action must be used.
      </p></td></tr><tr><td><p><span class="term">pointer~jumps</span></p></td><td><p>
This type of input action contains information about the motion of the
pointer when the pointer is to be moved a long distance,
and the time to delay before moving the pointer.
      </p></td></tr><tr><td><p><span class="term">delays</span></p></td><td><p>
This type of input action is used when the delay between input actions is too
large to be held in the other input actions.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestFakeInput</code>
function will return -1 if there is an error, and 0 otherwise.
</p><p>
An error code of \fIBadAccess\fR means that another client has already
sent user input actions to the server, and the server has not finished
processing the user input actions.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestqueryinputsize"></a>XTestQueryInputSize</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestQueryInputSize</strong>(</code>Display <var class="pdparam">*display</var>, unsigned long <var class="pdparam">size_return</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr><tr><td><p><span class="term">size_return</span></p></td><td><p>
Returns the number of input actions that the server's input action buffer can
hold.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestQueryInputSize</code>
function asks the server to return the number of input actions that it can hold
in its input action buffer in the unsigned long pointed to by \fIsize_return\fR.
</p><p>
The
<code class="function">XTestQueryInputSize</code>
function will return -1 if there is an error, and 0 otherwise.
</p></div><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="xtestreset"></a>XTestReset</h4></div></div></div><div class="funcsynopsis"><p><code class="funcdef">int <strong class="fsfunc">XTestReset</strong>(</code>Display <var class="pdparam">*display</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term">display</span></p></td><td><p>
Specifies the connection to the X server.
      </p></td></tr></tbody></table></div><p>
The
<code class="function">XTestReset</code>
function tells the server to set everything having to do with this extension
back to its initial state.  After this call the server will act as if this
extension were not installed until one of the extension functions is called by
a client.  This function is not normally needed, but is included in case a
client wishes to clean up the server state, such as after a serious error.
</p><p>
The
<code class="function">XTestReset</code>
function will return -1 if there is an error, and 0 otherwise.
</p></div></div></div></div></body></html>