forked from AuroraMiddleware/gtk
139 lines
2.7 KiB
Plaintext
139 lines
2.7 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GtkTextMark
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<!-- ##### SECTION Short_Description ##### -->
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A position in the buffer preserved across buffer modifications
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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You may wish to begin by reading the <link linkend="TextWidget">text widget
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conceptual overview</link> which gives an overview of all the objects and data
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types related to the text widget and how they work together.
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</para>
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<para>
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A #GtkTextMark is like a bookmark in a text buffer; it preserves a position in
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the text. You can convert the mark to an iterator using
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gtk_text_buffer_get_iter_at_mark(). Unlike iterators, marks remain valid across
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buffer mutations, because their behavior is defined when text is inserted or
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deleted. When text containing a mark is deleted, the mark remains in the
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position originally occupied by the deleted text. When text is inserted at a
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mark, a mark with <firstterm>left gravity</firstterm> will be moved to the
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beginning of the newly-inserted text, and a mark with <firstterm>right
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gravity</firstterm> will be moved to the end.
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<footnote>
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<para>
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"left" and "right" here refer to logical direction (left is the toward the start
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of the buffer); in some languages such as Hebrew the logically-leftmost text is
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not actually on the left when displayed.
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</para>
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</footnote>
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</para>
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<para>
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Marks are reference counted, but the reference count only controls the validity
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of the memory; marks can be deleted from the buffer at any time with
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gtk_text_buffer_delete_mark(). Once deleted from the buffer, a mark is
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essentially useless.
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</para>
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<para>
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Marks optionally have names; these can be convenient to avoid passing the
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#GtkTextMark object around.
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</para>
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<para>
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Marks are typically created using the gtk_text_buffer_create_mark() function.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### SECTION Stability_Level ##### -->
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<!-- ##### STRUCT GtkTextMark ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkTextMark:left-gravity ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkTextMark:name ##### -->
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<para>
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</para>
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<!-- ##### FUNCTION gtk_text_mark_new ##### -->
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<para>
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</para>
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@name:
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@left_gravity:
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@Returns:
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<!-- ##### FUNCTION gtk_text_mark_set_visible ##### -->
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<para>
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</para>
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@mark:
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@setting:
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<!-- ##### FUNCTION gtk_text_mark_get_visible ##### -->
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<para>
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</para>
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@mark:
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@Returns:
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<!-- ##### FUNCTION gtk_text_mark_get_deleted ##### -->
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<para>
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</para>
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@mark:
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@Returns:
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<!-- ##### FUNCTION gtk_text_mark_get_name ##### -->
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<para>
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</para>
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@mark:
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@Returns:
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<!-- ##### FUNCTION gtk_text_mark_get_buffer ##### -->
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<para>
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</para>
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@mark:
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@Returns:
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<!-- ##### FUNCTION gtk_text_mark_get_left_gravity ##### -->
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<para>
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</para>
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@mark:
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@Returns:
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