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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>GtkTextMark</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="GTK+ Reference Manual"><link rel="up" href="TextWidgetObjects.html" title="Multiline Text Editor"><link rel="prev" href="gtk-GtkTextIter.html" title="GtkTextIter"><link rel="next" href="GtkTextBuffer.html" title="GtkTextBuffer"><meta name="generator" content="GTK-Doc V1.9 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="gtk.html" title="Part I. GTK+ Overview"><link rel="part" href="gtkbase.html" title="Part II. GTK+ Core Reference"><link rel="part" href="gtkobjects.html" title="Part III. GTK+ Widgets and Objects"><link rel="chapter" href="ch01.html" title="Object Hierarchy"><link rel="chapter" href="ch02.html" title="Widget Gallery"><link rel="chapter" 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href="glossary.html" title="Glossary"><link rel="index" href="ix01.html" title="Index"><link rel="index" href="ix02.html" title="Index of deprecated symbols"><link rel="index" href="ix03.html" title="Index of new symbols in 2.2"><link rel="index" href="ix04.html" title="Index of new symbols in 2.4"><link rel="index" href="ix05.html" title="Index of new symbols in 2.6"><link rel="index" href="ix06.html" title="Index of new symbols in 2.8"><link rel="index" href="ix07.html" title="Index of new symbols in 2.10"><link rel="index" href="ix08.html" title="Index of new symbols in 2.12"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="gtk-GtkTextIter.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="TextWidgetObjects.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GTK+ Reference Manual</th><td><a accesskey="n" href="GtkTextBuffer.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#id3591382" class="shortcut">Top</a>  |  <a href="#id3591654" class="shortcut">Description</a>  |  <a href="#id3591578" class="shortcut">Object Hierarchy</a>  |  <a href="#id3591603" class="shortcut">Properties</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="GtkTextMark"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><a name="id3591382"></a><span class="refentrytitle">GtkTextMark</span></h2><p>GtkTextMark — A position in the buffer preserved across buffer modifications</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">#include <gtk/gtk.h> <a class="link" href="GtkTextMark.html#GtkTextMark-struct">GtkTextMark</a>;<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a>* <a class="link" href="GtkTextMark.html#gtk-text-mark-new">gtk_text_mark_new</a> (const <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar">gchar</a> *name, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> left_gravity);void <a class="link" href="GtkTextMark.html#gtk-text-mark-set-visible">gtk_text_mark_set_visible</a> (<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a> *mark, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> setting);<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> <a class="link" href="GtkTextMark.html#gtk-text-mark-get-visible">gtk_text_mark_get_visible</a> (<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a> *mark);<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> <a class="link" href="GtkTextMark.html#gtk-text-mark-get-deleted">gtk_text_mark_get_deleted</a> (<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a> *mark);const <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar">gchar</a>* <a class="link" href="GtkTextMark.html#gtk-text-mark-get-name">gtk_text_mark_get_name</a> (<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a> *mark);<a class="link" href="GtkTextBuffer.html" title="GtkTextBuffer">GtkTextBuffer</a>* <a class="link" href="GtkTextMark.html#gtk-text-mark-get-buffer">gtk_text_mark_get_buffer</a> (<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a> *mark);<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> <a class="link" href="GtkTextMark.html#gtk-text-mark-get-left-gravity">gtk_text_mark_get_left_gravity</a> (<a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a> *mark);</pre></div><div class="refsect1" lang="en"><a name="id3591578"></a><h2>Object Hierarchy</h2><pre class="synopsis"> <ahref="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----GtkTextMark</pre></div><div class="refsect1" lang="en"><a name="id3591603"></a><h2>Properties</h2><pre class="synopsis"> "<a class="link" href="GtkTextMark.html#GtkTextMark--left-gravity">left-gravity</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> : Read / Write / Construct Only "<a class="link" href="GtkTextMark.html#GtkTextMark--name">name</a>" <ahref="/usr/share/gtk-doc/html/gobject/gobject-Standard-Parameter-and-Value-Types.html#gchararray">gchararray</a> : Read / Write / Construct Only</pre></div><div class="refsect1" lang="en"><a name="id3591654"></a><h2>Description</h2><p>You may wish to begin by reading the <a class="link" href="TextWidget.html" title="Text Widget Overview">text widgetconceptual overview</a> which gives an overview of all the objects and datatypes related to the text widget and how they work together.</p><p>A <a class="link" href="GtkTextMark.html" title="GtkTextMark"><span class="type">GtkTextMark</span></a> is like a bookmark in a text buffer; it preserves a position inthe text. You can convert the mark to an iterator using<a class="link" href="GtkTextBuffer.html#gtk-text-buffer-get-iter-at-mark"><code class="function">gtk_text_buffer_get_iter_at_mark()</code></a>. Unlike iterators, marks remain valid acrossbuffer mutations, because their behavior is defined when text is inserted ordeleted. When text containing a mark is deleted, the mark remains in theposition originally occupied by the deleted text. When text is inserted at amark, a mark with <em class="firstterm">left gravity</em> will be moved to thebeginning of the newly-inserted text, and a mark with <em class="firstterm">rightgravity</em> will be moved to the end. <sup>[<a name="id3591716" href="#ftn.id3591716" class="footnote">3</a>]</sup></p><p>Marks are reference counted, but the reference count only controls the validityof the memory; marks can be deleted from the buffer at any time with<a class="link" href="GtkTextBuffer.html#gtk-text-buffer-delete-mark"><code class="function">gtk_text_buffer_delete_mark()</code></a>. Once deleted from the buffer, a mark isessentially useless.</p><p>Marks optionally have names; these can be convenient to avoid passing the <a class="link" href="GtkTextMark.html" title="GtkTextMark"><span class="type">GtkTextMark</span></a> object around.</p><p>Marks are typically created using the <a class="link" href="GtkTextBuffer.html#gtk-text-buffer-create-mark"><code class="function">gtk_text_buffer_create_mark()</code></a> function.</p></div><div class="refsect1" lang="en"><a name="id3591776"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id3591786"></a><h3><a name="GtkTextMark-struct"></a>GtkTextMark</h3><a class="indexterm" name="id3591798"></a><pre class="programlisting">typedef struct _GtkTextMark GtkTextMark;</pre><p></p></div><hr><div class="refsect2" lang="en"><a name="id3591813"></a><h3><a name="gtk-text-mark-new"></a>gtk_text_mark_new ()</h3><a class="indexterm" name="id3591829"></a><pre class="programlisting"><a class="link" href="GtkTextMark.html" title="GtkTextMark">GtkTextMark</a>* gtk_text_mark_new (const <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar">gchar</a> *name, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a> left_gravity);</pre><p>Creates a text mark. Add it to a buffer using <a class="link" href="GtkTextBuffer.html#gtk-text-buffer-add-mark"><code class="function">gtk_text_buffer_add_mark()</code></a>.If <em class="parameter"><code>name</code></em> is <ahref="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a>, the mark is anonymous; otherwise, the mark can be retrieved by name using <a class="link" href="GtkTextBuffer.html#gtk-text-buffer-get-mark"><code class="function">gtk_text_buffer_get_mark()</code></a>. If a mark has left gravity, and text is inserted at the mark's current location, the mark will be moved to the left of the newly-inserted text. If the mark has right gravity (<em class="parameter"><code>left_gravity</code></em> = <ahref="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>), the mark will end up on the right of newly-inserted text. The standard left-to-right cursor is a mark with right gravity (when you type, the cursor stays on the rightside of the text you're typing).</p><p></p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td><td> mark name or <ahref="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a></td></tr><tr><td><p><span class="term"><em class="parameter"><code>left_gravity</code></em> :</span></p></td><td> whether the mark should have left gravity</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td><td> new <a class="link" href="GtkTextMark.html" title="GtkTextMark"><span class="type">GtkTextMark</span></a>⌨️ 快捷键说明
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