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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#GtkSourceUndoManager.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#GtkSourceUndoManager.description" class="shortcut">Description</a>
                   | 
                  <a href="#GtkSourceUndoManager.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#GtkSourceUndoManager.prerequisites" class="shortcut">Prerequisites</a>
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                  <a href="#GtkSourceUndoManager.signals" class="shortcut">Signals</a>
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<div class="refentry">
<a name="GtkSourceUndoManager"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GtkSourceUndoManager.top_of_page"></a>GtkSourceUndoManager</span></h2>
<p>GtkSourceUndoManager — Undo manager interface for <a class="link" href="GtkSourceView.html" title="GtkSourceView"><span class="type">GtkSourceView</span></a></p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GtkSourceUndoManager.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;gtksourceview/gtksourceundomanager.h&gt;

                    <a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-struct" title="GtkSourceUndoManager">GtkSourceUndoManager</a>;
<span class="returnvalue">gboolean</span>            <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-undo" title="gtk_source_undo_manager_can_undo ()">gtk_source_undo_manager_can_undo</a>    (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-redo" title="gtk_source_undo_manager_can_redo ()">gtk_source_undo_manager_can_redo</a>    (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-undo" title="gtk_source_undo_manager_undo ()">gtk_source_undo_manager_undo</a>        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-redo" title="gtk_source_undo_manager_redo ()">gtk_source_undo_manager_redo</a>        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-begin-not-undoable-action" title="gtk_source_undo_manager_begin_not_undoable_action ()">gtk_source_undo_manager_begin_not_undoable_action</a>
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-end-not-undoable-action" title="gtk_source_undo_manager_end_not_undoable_action ()">gtk_source_undo_manager_end_not_undoable_action</a>
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-undo-changed" title="gtk_source_undo_manager_can_undo_changed ()">gtk_source_undo_manager_can_undo_changed</a>
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-redo-changed" title="gtk_source_undo_manager_can_redo_changed ()">gtk_source_undo_manager_can_redo_changed</a>
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  GInterface
   +----GtkSourceUndoManager
</pre>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.prerequisites"></a><h2>Prerequisites</h2>
<p>
GtkSourceUndoManager requires
 GObject.</p>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-can-redo-changed" title='The "can-redo-changed" signal'>can-redo-changed</a>"                               : <code class="literal">Action</code>
  "<a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-can-undo-changed" title='The "can-undo-changed" signal'>can-undo-changed</a>"                               : <code class="literal">Action</code>
</pre>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.description"></a><h2>Description</h2>
<p>
The <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> interface can be implemented to provide custom
undo management to a <a class="link" href="GtkSourceBuffer.html" title="GtkSourceBuffer"><span class="type">GtkSourceBuffer</span></a>. Use
<a class="link" href="GtkSourceBuffer.html#gtk-source-buffer-set-undo-manager" title="gtk_source_buffer_set_undo_manager ()"><span class="type">gtk_source_buffer_set_undo_manager</span></a> to install a custom undo manager for
a particular source buffer.
</p>
<p>
Use <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-undo-changed" title="gtk_source_undo_manager_can_undo_changed ()"><span class="type">gtk_source_undo_manager_can_undo_changed</span></a> and
<a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-redo-changed" title="gtk_source_undo_manager_can_redo_changed ()"><span class="type">gtk_source_undo_manager_can_redo_changed</span></a> when respectively the undo state
or redo state of the undo stack has changed.
</p>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GtkSourceUndoManager-struct"></a><h3>GtkSourceUndoManager</h3>
<pre class="programlisting">typedef struct _GtkSourceUndoManager GtkSourceUndoManager;</pre>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-can-undo"></a><h3>gtk_source_undo_manager_can_undo ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            gtk_source_undo_manager_can_undo    (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Get whether there are undo operations available.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if there are undo operations available, <code class="literal">FALSE</code> otherwise</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-can-redo"></a><h3>gtk_source_undo_manager_can_redo ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            gtk_source_undo_manager_can_redo    (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Get whether there are redo operations available.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if there are redo operations available, <code class="literal">FALSE</code> otherwise</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-undo"></a><h3>gtk_source_undo_manager_undo ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gtk_source_undo_manager_undo        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Perform a single undo. Calling this function when there are no undo operations
available is an error. Use <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-undo" title="gtk_source_undo_manager_can_undo ()"><span class="type">gtk_source_undo_manager_can_undo</span></a> to find out
if there are undo operations available.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr></tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-redo"></a><h3>gtk_source_undo_manager_redo ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gtk_source_undo_manager_redo        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Perform a single redo. Calling this function when there are no redo operations
available is an error. Use <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-can-redo" title="gtk_source_undo_manager_can_redo ()"><span class="type">gtk_source_undo_manager_can_redo</span></a> to find out
if there are redo operations available.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr></tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-begin-not-undoable-action"></a><h3>gtk_source_undo_manager_begin_not_undoable_action ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gtk_source_undo_manager_begin_not_undoable_action
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Begin a not undoable action on the buffer. All changes between this call
and the call to <a class="link" href="GtkSourceUndoManager.html#gtk-source-undo-manager-end-not-undoable-action" title="gtk_source_undo_manager_end_not_undoable_action ()"><span class="type">gtk_source_undo_manager_end_not_undoable_action</span></a> cannot
be undone. This function should be re-entrant.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr></tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-end-not-undoable-action"></a><h3>gtk_source_undo_manager_end_not_undoable_action ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gtk_source_undo_manager_end_not_undoable_action
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Ends a not undoable action on the buffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr></tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-can-undo-changed"></a><h3>gtk_source_undo_manager_can_undo_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gtk_source_undo_manager_can_undo_changed
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Emits the <a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-can-undo-changed" title='The "can-undo-changed" signal'><span class="type">"can-undo-changed"</span></a> signal.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr></tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-source-undo-manager-can-redo-changed"></a><h3>gtk_source_undo_manager_can_redo_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gtk_source_undo_manager_can_redo_changed
                                                        (<em class="parameter"><code><a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager</code></em>);</pre>
<p>
Emits the <a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-can-redo-changed" title='The "can-redo-changed" signal'><span class="type">"can-redo-changed"</span></a> signal.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>a <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>.</td>
</tr></tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GtkSourceUndoManager-can-redo-changed"></a><h3>The <code class="literal">"can-redo-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager,
                                                        <span class="type">gpointer</span>              user_data)      : <code class="literal">Action</code></pre>
<p>
Emitted when the ability to redo has changed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>The <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkSourceUndoManager-can-undo-changed"></a><h3>The <code class="literal">"can-undo-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a> *manager,
                                                        <span class="type">gpointer</span>              user_data)      : <code class="literal">Action</code></pre>
<p>
Emitted when the ability to undo has changed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>manager</code></em> :</span></p></td>
<td>The <a class="link" href="GtkSourceUndoManager.html" title="GtkSourceUndoManager"><span class="type">GtkSourceUndoManager</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
</div>
<div class="refsect1">
<a name="GtkSourceUndoManager.see-also"></a><h2>See Also</h2>
<span class="type">GtkTextBuffer</span>, <a class="link" href="GtkSourceView.html" title="GtkSourceView"><span class="type">GtkSourceView</span></a>
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