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<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" title="GtkSourceUndoManager">
<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>
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<div class="refsynopsisdiv" title="Synopsis">
<a name="GtkSourceUndoManager.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gtksourceview/gtksourceundomanager.h>
<a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-struct" title="GtkSourceUndoManager">GtkSourceUndoManager</a>;
<a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManagerIface" title="GtkSourceUndoManagerIface">GtkSourceUndoManagerIface</a>;
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <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>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <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" title="Object Hierarchy">
<a name="GtkSourceUndoManager.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
GInterface
+----GtkSourceUndoManager
</pre>
</div>
<div class="refsect1" title="Prerequisites">
<a name="GtkSourceUndoManager.prerequisites"></a><h2>Prerequisites</h2>
<p>
GtkSourceUndoManager requires
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>.</p>
</div>
<div class="refsect1" title="Signals">
<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>" : Run Last / Action
"<a class="link" href="GtkSourceUndoManager.html#GtkSourceUndoManager-can-undo-changed" title='The "can-undo-changed" signal'>can-undo-changed</a>" : Run Last / Action
</pre>
</div>
<div class="refsect1" title="Description">
<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
<span class="type">gtk_source_buffer_set_undo_manager</span> 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" title="Details">
<a name="GtkSourceUndoManager.details"></a><h2>Details</h2>
<div class="refsect2" title="GtkSourceUndoManager">
<a name="GtkSourceUndoManager-struct"></a><h3>GtkSourceUndoManager</h3>
<pre class="programlisting">typedef struct _GtkSourceUndoManager GtkSourceUndoManager;</pre>
</div>
<hr>
<div class="refsect2" title="GtkSourceUndoManagerIface">
<a name="GtkSourceUndoManagerIface"></a><h3>GtkSourceUndoManagerIface</h3>
<pre class="programlisting">typedef struct {
GTypeInterface parent;
/* Interface functions */
gboolean (*can_undo) (GtkSourceUndoManager *manager);
gboolean (*can_redo) (GtkSourceUndoManager *manager);
void (*undo) (GtkSourceUndoManager *manager);
void (*redo) (GtkSourceUndoManager *manager);
void (*begin_not_undoable_action) (GtkSourceUndoManager *manager);
void (*end_not_undoable_action) (GtkSourceUndoManager *manager);
/* Signals */
void (*can_undo_changed) (GtkSourceUndoManager *manager);
void (*can_redo_changed) (GtkSourceUndoManager *manager);
} GtkSourceUndoManagerIface;
</pre>
</div>
<hr>
<div class="refsect2" title="gtk_source_undo_manager_can_undo ()">
<a name="gtk-source-undo-manager-can-undo"></a><h3>gtk_source_undo_manager_can_undo ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> 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> <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if there are undo operations available, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2" title="gtk_source_undo_manager_can_redo ()">
<a name="gtk-source-undo-manager-can-redo"></a><h3>gtk_source_undo_manager_can_redo ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> 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> <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if there are redo operations available, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.10</p>
</div>
<hr>
<div class="refsect2" title="gtk_source_undo_manager_undo ()">
<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" title="gtk_source_undo_manager_redo ()">
<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" title="gtk_source_undo_manager_begin_not_undoable_action ()">
<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" title="gtk_source_undo_manager_end_not_undoable_action ()">
<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" title="gtk_source_undo_manager_can_undo_changed ()">
<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" title="gtk_source_undo_manager_can_redo_changed ()">
<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" title="Signal Details">
<a name="GtkSourceUndoManager.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2" title='The "can-redo-changed" signal'>
<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,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : Run Last / Action</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" title='The "can-undo-changed" signal'>
<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,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : Run Last / Action</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>
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<div class="refsect1" title="See Also">
<a name="GtkSourceUndoManager.see-also"></a><h2>See Also</h2>
<a href="http://library.gnome.org/devel/gtk/unstable/GtkTextBuffer.html"><span class="type">GtkTextBuffer</span></a>, <a class="link" href="GtkSourceView.html" title="GtkSourceView"><span class="type">GtkSourceView</span></a>
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