GtkTextIter

## GtkTextIter GtkTextIter — Text buffer iterator |

## Synopsis

    #include <gtk/gtk.h>

                        GtkTextIter;
    GtkTextBuffer *     gtk_text_iter_get_buffer            (const GtkTextIter *iter);
    GtkTextIter *       gtk_text_iter_copy                  (const GtkTextIter *iter);
    void                gtk_text_iter_assign                (GtkTextIter *iter,
                                                             const GtkTextIter *other);
    void                gtk_text_iter_free                  (GtkTextIter *iter);
    gint                gtk_text_iter_get_offset            (const GtkTextIter *iter);
    gint                gtk_text_iter_get_line              (const GtkTextIter *iter);
    gint                gtk_text_iter_get_line_offset       (const GtkTextIter *iter);
    gint                gtk_text_iter_get_line_index        (const GtkTextIter *iter);
    gint                gtk_text_iter_get_visible_line_index
                                                            (const GtkTextIter *iter);
    gint                gtk_text_iter_get_visible_line_offset
                                                            (const GtkTextIter *iter);
    gunichar            gtk_text_iter_get_char              (const GtkTextIter *iter);
    gchar *             gtk_text_iter_get_slice             (const GtkTextIter *start,
                                                             const GtkTextIter *end);
    gchar *             gtk_text_iter_get_text              (const GtkTextIter *start,
                                                             const GtkTextIter *end);
    gchar *             gtk_text_iter_get_visible_slice     (const GtkTextIter *start,
                                                             const GtkTextIter *end);
    gchar *             gtk_text_iter_get_visible_text      (const GtkTextIter *start,
                                                             const GtkTextIter *end);
    GdkPixbuf *         gtk_text_iter_get_pixbuf            (const GtkTextIter *iter);
    GSList *            gtk_text_iter_get_marks             (const GtkTextIter *iter);
    GSList *            gtk_text_iter_get_toggled_tags      (const GtkTextIter *iter,
                                                             gboolean toggled_on);
    GtkTextChildAnchor * gtk_text_iter_get_child_anchor     (const GtkTextIter *iter);
    gboolean            gtk_text_iter_begins_tag            (const GtkTextIter *iter,
                                                             GtkTextTag *tag);
    gboolean            gtk_text_iter_ends_tag              (const GtkTextIter *iter,
                                                             GtkTextTag *tag);
    gboolean            gtk_text_iter_toggles_tag           (const GtkTextIter *iter,
                                                             GtkTextTag *tag);
    gboolean            gtk_text_iter_has_tag               (const GtkTextIter *iter,
                                                             GtkTextTag *tag);
    GSList *            gtk_text_iter_get_tags              (const GtkTextIter *iter);
    gboolean            gtk_text_iter_editable              (const GtkTextIter *iter,
                                                             gboolean default_setting);
    gboolean            gtk_text_iter_can_insert            (const GtkTextIter *iter,
                                                             gboolean default_editability);
    gboolean            gtk_text_iter_starts_word           (const GtkTextIter *iter);
    gboolean            gtk_text_iter_ends_word             (const GtkTextIter *iter);
    gboolean            gtk_text_iter_inside_word           (const GtkTextIter *iter);
    gboolean            gtk_text_iter_starts_line           (const GtkTextIter *iter);
    gboolean            gtk_text_iter_ends_line             (const GtkTextIter *iter);
    gboolean            gtk_text_iter_starts_sentence       (const GtkTextIter *iter);
    gboolean            gtk_text_iter_ends_sentence         (const GtkTextIter *iter);
    gboolean            gtk_text_iter_inside_sentence       (const GtkTextIter *iter);
    gboolean            gtk_text_iter_is_cursor_position    (const GtkTextIter *iter);
    gint                gtk_text_iter_get_chars_in_line     (const GtkTextIter *iter);
    gint                gtk_text_iter_get_bytes_in_line     (const GtkTextIter *iter);
    gboolean            gtk_text_iter_get_attributes        (const GtkTextIter *iter,
                                                             GtkTextAttributes *values);
    PangoLanguage *     gtk_text_iter_get_language          (const GtkTextIter *iter);
    gboolean            gtk_text_iter_is_end                (const GtkTextIter *iter);
    gboolean            gtk_text_iter_is_start              (const GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_char          (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_char         (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_chars         (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_chars        (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_line          (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_line         (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_lines         (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_lines        (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_word_ends     (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_word_starts  (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_word_end      (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_word_start   (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_cursor_position
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_cursor_position
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_sentence_start
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_sentence_starts
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_sentence_end  (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_sentence_ends (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_visible_word_ends
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_visible_word_starts
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_visible_word_end
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_visible_word_start
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_visible_cursor_position
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_visible_cursor_position
                                                            (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_visible_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_visible_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_forward_visible_line  (GtkTextIter *iter);
    gboolean            gtk_text_iter_backward_visible_line (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_visible_lines (GtkTextIter *iter,
                                                             gint count);
    gboolean            gtk_text_iter_backward_visible_lines
                                                            (GtkTextIter *iter,
                                                             gint count);
    void                gtk_text_iter_set_offset            (GtkTextIter *iter,
                                                             gint char_offset);
    void                gtk_text_iter_set_line              (GtkTextIter *iter,
                                                             gint line_number);
    void                gtk_text_iter_set_line_offset       (GtkTextIter *iter,
                                                             gint char_on_line);
    void                gtk_text_iter_set_line_index        (GtkTextIter *iter,
                                                             gint byte_on_line);
    void                gtk_text_iter_set_visible_line_index
                                                            (GtkTextIter *iter,
                                                             gint byte_on_line);
    void                gtk_text_iter_set_visible_line_offset
                                                            (GtkTextIter *iter,
                                                             gint char_on_line);
    void                gtk_text_iter_forward_to_end        (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_to_line_end   (GtkTextIter *iter);
    gboolean            gtk_text_iter_forward_to_tag_toggle (GtkTextIter *iter,
                                                             GtkTextTag *tag);
    gboolean            gtk_text_iter_backward_to_tag_toggle
                                                            (GtkTextIter *iter,
                                                             GtkTextTag *tag);
    gboolean            (*GtkTextCharPredicate)             (gunichar ch,
                                                             gpointer user_data);
    gboolean            gtk_text_iter_forward_find_char     (GtkTextIter *iter,
                                                             GtkTextCharPredicate pred,
                                                             gpointer user_data,
                                                             const GtkTextIter *limit);
    gboolean            gtk_text_iter_backward_find_char    (GtkTextIter *iter,
                                                             GtkTextCharPredicate pred,
                                                             gpointer user_data,
                                                             const GtkTextIter *limit);
    enum                GtkTextSearchFlags;
    gboolean            gtk_text_iter_forward_search        (const GtkTextIter *iter,
                                                             const gchar *str,
                                                             GtkTextSearchFlags flags,
                                                             GtkTextIter *match_start,
                                                             GtkTextIter *match_end,
                                                             const GtkTextIter *limit);
    gboolean            gtk_text_iter_backward_search       (const GtkTextIter *iter,
                                                             const gchar *str,
                                                             GtkTextSearchFlags flags,
                                                             GtkTextIter *match_start,
                                                             GtkTextIter *match_end,
                                                             const GtkTextIter *limit);
    gboolean            gtk_text_iter_equal                 (const GtkTextIter *lhs,
                                                             const GtkTextIter *rhs);
    gint                gtk_text_iter_compare               (const GtkTextIter *lhs,
                                                             const GtkTextIter *rhs);
    gboolean            gtk_text_iter_in_range              (const GtkTextIter *iter,
                                                             const GtkTextIter *start,
                                                             const GtkTextIter *end);
    void                gtk_text_iter_order                 (GtkTextIter *first,
                                                             GtkTextIter *second);

## Object Hierarchy

      GBoxed
       +----GtkTextIter

## Description

You may wish to begin by reading the text widget conceptual overview which gives an overview of all the objects and data types related to the text widget and how they work together.

## Details

### GtkTextIter

    typedef struct {
      /* GtkTextIter is an opaque datatype; ignore all these fields.
       * Initialize the iter with gtk_text_buffer_get_iter_*
       * functions
       */
    } GtkTextIter;

### gtk_text_iter_get_buffer ()

    GtkTextBuffer *     gtk_text_iter_get_buffer            (const GtkTextIter *iter);

Returns the GtkTextBuffer this iterator is associated with.

`iter` : | an iterator
Returns : | the buffer. [transfer none]

### gtk_text_iter_copy ()

    GtkTextIter *       gtk_text_iter_copy                  (const GtkTextIter *iter);

Creates a dynamically-allocated copy of an iterator. This function is not useful in applications, because iterators can be copied with a simple assignment (`GtkTextIter i = j;`). The function is used by language bindings.

`iter` : | an iterator
Returns : | a copy of the `iter`, free with `gtk_text_iter_free()`

### gtk_text_iter_assign ()

    void                gtk_text_iter_assign                (GtkTextIter *iter,
                                                             const GtkTextIter *other);

Assigns the value of `other` to `iter`. This function is not useful in applications, because iterators can be assigned with `GtkTextIter i = j;`. The function is used by language bindings.

`iter` : | a GtkTextIter
`other` : | another GtkTextIter

Since 3.2

### gtk_text_iter_free ()

    void                gtk_text_iter_free                  (GtkTextIter *iter);

Free an iterator allocated on the heap. This function is intended for use in language bindings, and is not especially useful for applications, because iterators can simply be allocated on the stack.

`iter` : | a dynamically-allocated iterator

### gtk_text_iter_get_offset ()

    gint                gtk_text_iter_get_offset            (const GtkTextIter *iter);

Returns the character offset of an iterator. Each character in a GtkTextBuffer has an offset, starting with 0 for the first character in the buffer. Use `gtk_text_buffer_get_iter_at_offset()` to convert an offset back into an iterator.

`iter` : | an iterator
Returns : | a character offset

### gtk_text_iter_get_line ()

    gint                gtk_text_iter_get_line              (const GtkTextIter *iter);

Returns the line number containing the iterator. Lines in a GtkTextBuffer are numbered beginning with 0 for the first line in the buffer.

`iter` : | an iterator
Returns : | a line number

### gtk_text_iter_get_line_offset ()

    gint                gtk_text_iter_get_line_offset       (const GtkTextIter *iter);

Returns the character offset of the iterator, counting from the start of a newline-terminated line. The first character on the line has offset 0.

`iter` : | an iterator
Returns : | offset from start of line

### gtk_text_iter_get_line_index ()

    gint                gtk_text_iter_get_line_index        (const GtkTextIter *iter);

Returns the byte index of the iterator, counting from the start of a newline-terminated line. Remember that GtkTextBuffer encodes text in UTF-8, and that characters can require a variable number of bytes to represent.

`iter` : | an iterator
Returns : | distance from start of line, in bytes

### gtk_text_iter_get_visible_line_index ()

    gint                gtk_text_iter_get_visible_line_index
                                                            (const GtkTextIter *iter);

Returns the number of bytes from the start of the line to the given `iter`, not counting bytes that are invisible due to tags with the "invisible" flag toggled on.

`iter` : | a GtkTextIter
Returns : | byte index of `iter` with respect to the start of the line

### gtk_text_iter_get_visible_line_offset ()

    gint                gtk_text_iter_get_visible_line_offset
                                                            (const GtkTextIter *iter);

Returns the offset in characters from the start of the line to the given `iter`, not counting characters that are invisible due to tags with the "invisible" flag toggled on.

`iter` : | a GtkTextIter
Returns : | offset in visible characters from the start of the line

### gtk_text_iter_get_char ()

    gunichar            gtk_text_iter_get_char              (const GtkTextIter *iter);

The Unicode character at this iterator is returned. (Equivalent to operator* on a C++ iterator.) If the element at this iterator is a non-character element, such as an image embedded in the buffer, the Unicode "unknown" character 0xFFFC is returned. If invoked on the end iterator, zero is returned; zero is not a valid Unicode character. So you can write a loop which ends when `gtk_text_iter_get_char()` returns 0.

`iter` : | an iterator
Returns : | a Unicode character, or 0 if `iter` is not dereferenceable

### gtk_text_iter_get_slice ()

    gchar *             gtk_text_iter_get_slice             (const GtkTextIter *start,
                                                             const GtkTextIter *end);

Returns the text in the given range. A "slice" is an array of characters encoded in UTF-8 format, including the Unicode "unknown" character 0xFFFC for iterable non-character elements in the buffer, such as images. Because images are encoded in the slice, byte and character offsets in the returned array will correspond to byte offsets in the text buffer. Note that 0xFFFC can occur in normal text as well, so it is not a reliable indicator that a pixbuf or widget is in the buffer.

`start` : | iterator at start of a range
`end` : | iterator at end of a range
Returns : | slice of text from the buffer

### gtk_text_iter_get_text ()

    gchar *             gtk_text_iter_get_text              (const GtkTextIter *start,
                                                             const GtkTextIter *end);

Returns text in the given range. If the range contains non-text elements such as images, the character and byte offsets in the returned string will not correspond to character and byte offsets in the buffer. If you want offsets to correspond, see `gtk_text_iter_get_slice()`.

`start` : | iterator at start of a range
`end` : | iterator at end of a range
Returns : | array of characters from the buffer

### gtk_text_iter_get_visible_slice ()

    gchar *             gtk_text_iter_get_visible_slice     (const GtkTextIter *start,
                                                             const GtkTextIter *end);

Like `gtk_text_iter_get_slice()`, but invisible text is not included. Invisible text is usually invisible because a GtkTextTag with the "invisible" attribute turned on has been applied to it.

`start` : | iterator at start of range
`end` : | iterator at end of range
Returns : | slice of text from the buffer

### gtk_text_iter_get_visible_text ()

    gchar *             gtk_text_iter_get_visible_text      (const GtkTextIter *start,
                                                             const GtkTextIter *end);

Like `gtk_text_iter_get_text()`, but invisible text is not included. Invisible text is usually invisible because a GtkTextTag with the "invisible" attribute turned on has been applied to it.

`start` : | iterator at start of range
`end` : | iterator at end of range
Returns : | string containing visible text in the range

### gtk_text_iter_get_pixbuf ()

    GdkPixbuf *         gtk_text_iter_get_pixbuf            (const GtkTextIter *iter);

If the element at `iter` is a pixbuf, the pixbuf is returned (with no new reference count added). Otherwise, `NULL` is returned.

`iter` : | an iterator
Returns : | the pixbuf at `iter`. [transfer none]

### gtk_text_iter_get_marks ()

    GSList *            gtk_text_iter_get_marks             (const GtkTextIter *iter);

Returns a list of all GtkTextMark at this location. Because marks are not iterable (they don't take up any "space" in the buffer, they are just marks in between iterable locations), multiple marks can exist in the same place. The returned list is not in any meaningful order.

`iter` : | an iterator
Returns : | list of GtkTextMark. [element-type GtkTextMark][transfer container]

### gtk_text_iter_get_toggled_tags ()

    GSList *            gtk_text_iter_get_toggled_tags      (const GtkTextIter *iter,
                                                             gboolean toggled_on);

Returns a list of GtkTextTag that are toggled on or off at this point. (If `toggled_on` is `TRUE`, the list contains tags that are toggled on.) If a tag is toggled on at `iter`, then some non-empty range of characters following `iter` has that tag applied to it. If a tag is toggled off, then some non-empty range following `iter` does not have the tag applied to it.

`iter` : | an iterator
`toggled_on` : | `TRUE` to get toggled-on tags
Returns : | tags toggled at this point. [element-type GtkTextTag][transfer container]

### gtk_text_iter_get_child_anchor ()

    GtkTextChildAnchor * gtk_text_iter_get_child_anchor     (const GtkTextIter *iter);

If the location at `iter` contains a child anchor, the anchor is returned (with no new reference count added). Otherwise, `NULL` is returned.

`iter` : | an iterator
Returns : | the anchor at `iter`. [transfer none]

### gtk_text_iter_begins_tag ()

    gboolean            gtk_text_iter_begins_tag            (const GtkTextIter *iter,
                                                             GtkTextTag *tag);

Returns `TRUE` if `tag` is toggled on at exactly this point. If `tag` is `NULL`, returns `TRUE` if any tag is toggled on at this point.

Note that if `gtk_text_iter_begins_tag()` returns `TRUE`, it means that `iter` is at the beginning of the tagged range, and that the character at `iter` is inside the tagged range. In other words, unlike `gtk_text_iter_ends_tag()`, if `gtk_text_iter_begins_tag()` returns `TRUE`, `gtk_text_iter_has_tag()` will also return `TRUE` for the same parameters.

`iter` : | an iterator
`tag` : | a GtkTextTag, or `NULL`. [allow-none]
Returns : | whether `iter` is the start of a range tagged with `tag`

### gtk_text_iter_ends_tag ()

    gboolean            gtk_text_iter_ends_tag              (const GtkTextIter *iter,
                                                             GtkTextTag *tag);

Returns `TRUE` if `tag` is toggled off at exactly this point. If `tag` is `NULL`, returns `TRUE` if any tag is toggled off at this point.

Note that if `gtk_text_iter_ends_tag()` returns `TRUE`, it means that `iter` is at the end of the tagged range, but that the character at `iter` is outside the tagged range. In other words, unlike `gtk_text_iter_begins_tag()`, if `gtk_text_iter_ends_tag()` returns `TRUE`, `gtk_text_iter_has_tag()` will return `FALSE` for the same parameters.

`iter` : | an iterator
`tag` : | a GtkTextTag, or `NULL`. [allow-none]
Returns : | whether `iter` is the end of a range tagged with `tag`

### gtk_text_iter_toggles_tag ()

    gboolean            gtk_text_iter_toggles_tag           (const GtkTextIter *iter,
                                                             GtkTextTag *tag);

This is equivalent to (`gtk_text_iter_begins_tag()` || `gtk_text_iter_ends_tag()`), i.e. it tells you whether a range with `tag` applied to it begins or ends at `iter`.

`iter` : | an iterator
`tag` : | a GtkTextTag, or `NULL`. [allow-none]
Returns : | whether `tag` is toggled on or off at `iter`

### gtk_text_iter_has_tag ()

    gboolean            gtk_text_iter_has_tag               (const GtkTextIter *iter,
                                                             GtkTextTag *tag);

Returns `TRUE` if `iter` points to a character that is part of a range tagged with `tag`. See also `gtk_text_iter_begins_tag()` and `gtk_text_iter_ends_tag()`.

`iter` : | an iterator
`tag` : | a GtkTextTag
Returns : | whether `iter` is tagged with `tag`

### gtk_text_iter_get_tags ()

    GSList *            gtk_text_iter_get_tags              (const GtkTextIter *iter);

Returns a list of tags that apply to `iter`, in ascending order of priority (highest-priority tags are last). The GtkTextTag in the list don't have a reference added, but you have to free the list itself.

`iter` : | a GtkTextIter
Returns : | list of GtkTextTag. [element-type GtkTextTag][transfer container]

### gtk_text_iter_editable ()

    gboolean            gtk_text_iter_editable              (const GtkTextIter *iter,
                                                             gboolean default_setting);

Returns whether the character at `iter` is within an editable region of text. Non-editable text is "locked" and can't be changed by the user via GtkTextView. This function is simply a convenience wrapper around `gtk_text_iter_get_attributes()`. If no tags applied to this text affect editability, `default_setting` will be returned.

You don't want to use this function to decide whether text can be inserted at `iter`, because for insertion you don't want to know whether the char at `iter` is inside an editable range, you want to know whether a new character inserted at `iter` would be inside an editable range. Use `gtk_text_iter_can_insert()` to handle this case.

`iter` : | an iterator
`default_setting` : | `TRUE` if text is editable by default
Returns : | whether `iter` is inside an editable range

### gtk_text_iter_can_insert ()

    gboolean            gtk_text_iter_can_insert            (const GtkTextIter *iter,
                                                             gboolean default_editability);

Considering the default editability of the buffer, and tags that affect editability, determines whether text inserted at `iter` would be editable. If text inserted at `iter` would be editable then the user should be allowed to insert text at `iter`. `gtk_text_buffer_insert_interactive()` uses this function to decide whether insertions are allowed at a given position.

`iter` : | an iterator
`default_editability` : | `TRUE` if text is editable by default
Returns : | whether text inserted at `iter` would be editable

### gtk_text_iter_starts_word ()

    gboolean            gtk_text_iter_starts_word           (const GtkTextIter *iter);

Determines whether `iter` begins a natural-language word. Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` is at the start of a word

### gtk_text_iter_ends_word ()

    gboolean            gtk_text_iter_ends_word             (const GtkTextIter *iter);

Determines whether `iter` ends a natural-language word. Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` is at the end of a word

### gtk_text_iter_inside_word ()

    gboolean            gtk_text_iter_inside_word           (const GtkTextIter *iter);

Determines whether `iter` is inside a natural-language word (as opposed to say inside some whitespace). Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` is inside a word

### gtk_text_iter_starts_line ()

    gboolean            gtk_text_iter_starts_line           (const GtkTextIter *iter);

Returns `TRUE` if `iter` begins a paragraph, i.e. if `gtk_text_iter_get_line_offset()` would return 0. However this function is potentially more efficient than `gtk_text_iter_get_line_offset()` because it doesn't have to compute the offset, it just has to see whether it's 0.

`iter` : | an iterator
Returns : | whether `iter` begins a line

### gtk_text_iter_ends_line ()

    gboolean            gtk_text_iter_ends_line             (const GtkTextIter *iter);

Returns `TRUE` if `iter` points to the start of the paragraph delimiter characters for a line (delimiters will be either a newline, a carriage return, a carriage return followed by a newline, or a Unicode paragraph separator character). Note that an iterator pointing to the \n of a \r\n pair will not be counted as the end of a line, the line ends before the \r. The end iterator is considered to be at the end of a line, even though there are no paragraph delimiter chars there.

`iter` : | an iterator
Returns : | whether `iter` is at the end of a line

### gtk_text_iter_starts_sentence ()

    gboolean            gtk_text_iter_starts_sentence       (const GtkTextIter *iter);

Determines whether `iter` begins a sentence. Sentence boundaries are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango text boundary algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` is at the start of a sentence.

### gtk_text_iter_ends_sentence ()

    gboolean            gtk_text_iter_ends_sentence         (const GtkTextIter *iter);

Determines whether `iter` ends a sentence. Sentence boundaries are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango text boundary algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` is at the end of a sentence.

### gtk_text_iter_inside_sentence ()

    gboolean            gtk_text_iter_inside_sentence       (const GtkTextIter *iter);

Determines whether `iter` is inside a sentence (as opposed to in between two sentences, e.g. after a period and before the first letter of the next sentence). Sentence boundaries are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango text boundary algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` is inside a sentence.

### gtk_text_iter_is_cursor_position ()

    gboolean            gtk_text_iter_is_cursor_position    (const GtkTextIter *iter);

See `gtk_text_iter_forward_cursor_position()` or PangoLogAttr or `pango_break()` for details on what a cursor position is.

`iter` : | a GtkTextIter
Returns : | `TRUE` if the cursor can be placed at `iter`

### gtk_text_iter_get_chars_in_line ()

    gint                gtk_text_iter_get_chars_in_line     (const GtkTextIter *iter);

Returns the number of characters in the line containing `iter`, including the paragraph delimiters.

`iter` : | an iterator
Returns : | number of characters in the line

### gtk_text_iter_get_bytes_in_line ()

    gint                gtk_text_iter_get_bytes_in_line     (const GtkTextIter *iter);

Returns the number of bytes in the line containing `iter`, including the paragraph delimiters.

`iter` : | an iterator
Returns : | number of bytes in the line

### gtk_text_iter_get_attributes ()

    gboolean            gtk_text_iter_get_attributes        (const GtkTextIter *iter,
                                                             GtkTextAttributes *values);

Computes the effect of any tags applied to this spot in the text. The `values` parameter should be initialized to the default settings you wish to use if no tags are in effect. You'd typically obtain the defaults from `gtk_text_view_get_default_attributes()`.

`gtk_text_iter_get_attributes()` will modify `values`, applying the effects of any tags present at `iter`. If any tags affected `values`, the function returns `TRUE`.

`iter` : | an iterator
`values` : | a GtkTextAttributes to be filled in. [out]
Returns : | `TRUE` if `values` was modified

### gtk_text_iter_get_language ()

    PangoLanguage *     gtk_text_iter_get_language          (const GtkTextIter *iter);

A convenience wrapper around `gtk_text_iter_get_attributes()`, which returns the language in effect at `iter`. If no tags affecting language apply to `iter`, the return value is identical to that of `gtk_get_default_language()`.

`iter` : | an iterator
Returns : | language in effect at `iter`

### gtk_text_iter_is_end ()

    gboolean            gtk_text_iter_is_end                (const GtkTextIter *iter);

Returns `TRUE` if `iter` is the end iterator, i.e. one past the last dereferenceable iterator in the buffer. `gtk_text_iter_is_end()` is the most efficient way to check whether an iterator is the end iterator.

`iter` : | an iterator
Returns : | whether `iter` is the end iterator

### gtk_text_iter_is_start ()

    gboolean            gtk_text_iter_is_start              (const GtkTextIter *iter);

Returns `TRUE` if `iter` is the first iterator in the buffer, that is if `iter` has a character offset of 0.

`iter` : | an iterator
Returns : | whether `iter` is the first in the buffer

### gtk_text_iter_forward_char ()

    gboolean            gtk_text_iter_forward_char          (GtkTextIter *iter);

Moves `iter` forward by one character offset. Note that images embedded in the buffer occupy 1 character slot, so `gtk_text_iter_forward_char()` may actually move onto an image instead of a character, if you have images in your buffer. If `iter` is the end iterator or one character before it, `iter` will now point at the end iterator, and `gtk_text_iter_forward_char()` returns `FALSE` for convenience when writing loops.

`iter` : | an iterator
Returns : | whether `iter` moved and is dereferenceable

### gtk_text_iter_backward_char ()

    gboolean            gtk_text_iter_backward_char         (GtkTextIter *iter);

Moves backward by one character offset. Returns `TRUE` if movement was possible; if `iter` was the first in the buffer (character offset 0), `gtk_text_iter_backward_char()` returns `FALSE` for convenience when writing loops.

`iter` : | an iterator
Returns : | whether movement was possible

### gtk_text_iter_forward_chars ()

    gboolean            gtk_text_iter_forward_chars         (GtkTextIter *iter,
                                                             gint count);

Moves `count` characters if possible (if `count` would move past the start or end of the buffer, moves to the start or end of the buffer). The return value indicates whether the new position of `iter` is different from its original position, and dereferenceable (the last iterator in the buffer is not dereferenceable). If `count` is 0, the function does nothing and returns `FALSE`.

`iter` : | an iterator
`count` : | number of characters to move, may be negative
Returns : | whether `iter` moved and is dereferenceable

### gtk_text_iter_backward_chars ()

    gboolean            gtk_text_iter_backward_chars        (GtkTextIter *iter,
                                                             gint count);

Moves `count` characters backward, if possible (if `count` would move past the start or end of the buffer, moves to the start or end of the buffer). The return value indicates whether the iterator moved onto a dereferenceable position; if the iterator didn't move, or moved onto the end iterator, then `FALSE` is returned. If `count` is 0, the function does nothing and returns `FALSE`.

`iter` : | an iterator
`count` : | number of characters to move
Returns : | whether `iter` moved and is dereferenceable

### gtk_text_iter_forward_line ()

    gboolean            gtk_text_iter_forward_line          (GtkTextIter *iter);

Moves `iter` to the start of the next line. If the iter is already on the last line of the buffer, moves the iter to the end of the current line. If after the operation, the iter is at the end of the buffer and not dereferencable, returns `FALSE`. Otherwise, returns `TRUE`.

`iter` : | an iterator
Returns : | whether `iter` can be dereferenced

### gtk_text_iter_backward_line ()

    gboolean            gtk_text_iter_backward_line         (GtkTextIter *iter);

Moves `iter` to the start of the previous line. Returns `TRUE` if `iter` could be moved; i.e. if `iter` was at character offset 0, this function returns `FALSE`. Therefore if `iter` was already on line 0, but not at the start of the line, `iter` is snapped to the start of the line and the function returns `TRUE`. (Note that this implies that in a loop calling this function, the line number may not change on every iteration, if your first iteration is on line 0.)

`iter` : | an iterator
Returns : | whether `iter` moved

### gtk_text_iter_forward_lines ()

    gboolean            gtk_text_iter_forward_lines         (GtkTextIter *iter,
                                                             gint count);

Moves `count` lines forward, if possible (if `count` would move past the start or end of the buffer, moves to the start or end of the buffer). The return value indicates whether the iterator moved onto a dereferenceable position; if the iterator didn't move, or moved onto the end iterator, then `FALSE` is returned. If `count` is 0, the function does nothing and returns `FALSE`. If `count` is negative, moves backward by 0 - `count` lines.

`iter` : | a GtkTextIter
`count` : | number of lines to move forward
Returns : | whether `iter` moved and is dereferenceable

### gtk_text_iter_backward_lines ()

    gboolean            gtk_text_iter_backward_lines        (GtkTextIter *iter,
                                                             gint count);

Moves `count` lines backward, if possible (if `count` would move past the start or end of the buffer, moves to the start or end of the buffer). The return value indicates whether the iterator moved onto a dereferenceable position; if the iterator didn't move, or moved onto the end iterator, then `FALSE` is returned. If `count` is 0, the function does nothing and returns `FALSE`. If `count` is negative, moves forward by 0 - `count` lines.

`iter` : | a GtkTextIter
`count` : | number of lines to move backward
Returns : | whether `iter` moved and is dereferenceable

### gtk_text_iter_forward_word_ends ()

    gboolean            gtk_text_iter_forward_word_ends     (GtkTextIter *iter,
                                                             gint count);

Calls `gtk_text_iter_forward_word_end()` up to `count` times.

`iter` : | a GtkTextIter
`count` : | number of times to move
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_backward_word_starts ()

    gboolean            gtk_text_iter_backward_word_starts  (GtkTextIter *iter,
                                                             gint count);

Calls `gtk_text_iter_backward_word_start()` up to `count` times.

`iter` : | a GtkTextIter
`count` : | number of times to move
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_forward_word_end ()

    gboolean            gtk_text_iter_forward_word_end      (GtkTextIter *iter);

Moves forward to the next word end. (If `iter` is currently on a word end, moves forward to the next one after that.) Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_backward_word_start ()

    gboolean            gtk_text_iter_backward_word_start   (GtkTextIter *iter);

Moves backward to the previous word start. (If `iter` is currently on a word start, moves backward to the next one after that.) Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_forward_cursor_position ()

    gboolean            gtk_text_iter_forward_cursor_position
                                                            (GtkTextIter *iter);

Moves `iter` forward by a single cursor position. Cursor positions are (unsurprisingly) positions where the cursor can appear. Perhaps surprisingly, there may not be a cursor position between all characters. The most common example for European languages would be a carriage return/newline sequence. For some Unicode characters, the equivalent of say the letter "a" with an accent mark will be represented as two characters, first the letter then a "combining mark" that causes the accent to be rendered; so the cursor can't go between those two characters. See also the PangoLogAttr structure and `pango_break()` function.

`iter` : | a GtkTextIter
Returns : | `TRUE` if we moved and the new position is dereferenceable

### gtk_text_iter_backward_cursor_position ()

    gboolean            gtk_text_iter_backward_cursor_position
                                                            (GtkTextIter *iter);

Like `gtk_text_iter_forward_cursor_position()`, but moves backward.

`iter` : | a GtkTextIter
Returns : | `TRUE` if we moved

### gtk_text_iter_forward_cursor_positions ()

    gboolean            gtk_text_iter_forward_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);

Moves up to `count` cursor positions. See `gtk_text_iter_forward_cursor_position()` for details.

`iter` : | a GtkTextIter
`count` : | number of positions to move
Returns : | `TRUE` if we moved and the new position is dereferenceable

### gtk_text_iter_backward_cursor_positions ()

    gboolean            gtk_text_iter_backward_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);

Moves up to `count` cursor positions. See `gtk_text_iter_forward_cursor_position()` for details.

`iter` : | a GtkTextIter
`count` : | number of positions to move
Returns : | `TRUE` if we moved and the new position is dereferenceable

### gtk_text_iter_backward_sentence_start ()

    gboolean            gtk_text_iter_backward_sentence_start
                                                            (GtkTextIter *iter);

Moves backward to the previous sentence start; if `iter` is already at the start of a sentence, moves backward to the next one. Sentence boundaries are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango text boundary algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_backward_sentence_starts ()

    gboolean            gtk_text_iter_backward_sentence_starts
                                                            (GtkTextIter *iter,
                                                             gint count);

Calls `gtk_text_iter_backward_sentence_start()` up to `count` times, or until it returns `FALSE`. If `count` is negative, moves forward instead of backward.

`iter` : | a GtkTextIter
`count` : | number of sentences to move
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_forward_sentence_end ()

    gboolean            gtk_text_iter_forward_sentence_end  (GtkTextIter *iter);

Moves forward to the next sentence end. (If `iter` is at the end of a sentence, moves to the next end of sentence.) Sentence boundaries are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango text boundary algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_forward_sentence_ends ()

    gboolean            gtk_text_iter_forward_sentence_ends (GtkTextIter *iter,
                                                             gint count);

Calls `gtk_text_iter_forward_sentence_end()` `count` times (or until `gtk_text_iter_forward_sentence_end()` returns `FALSE`). If `count` is negative, moves backward instead of forward.

`iter` : | a GtkTextIter
`count` : | number of sentences to move
Returns : | `TRUE` if `iter` moved and is not the end iterator

### gtk_text_iter_forward_visible_word_ends ()

    gboolean            gtk_text_iter_forward_visible_word_ends
                                                            (GtkTextIter *iter,
                                                             gint count);

Calls `gtk_text_iter_forward_visible_word_end()` up to `count` times.

`iter` : | a GtkTextIter
`count` : | number of times to move
Returns : | `TRUE` if `iter` moved and is not the end iterator

Since 2.4

### gtk_text_iter_backward_visible_word_starts ()

    gboolean            gtk_text_iter_backward_visible_word_starts
                                                            (GtkTextIter *iter,
                                                             gint count);

Calls `gtk_text_iter_backward_visible_word_start()` up to `count` times.

`iter` : | a GtkTextIter
`count` : | number of times to move
Returns : | `TRUE` if `iter` moved and is not the end iterator

Since 2.4

### gtk_text_iter_forward_visible_word_end ()

    gboolean            gtk_text_iter_forward_visible_word_end
                                                            (GtkTextIter *iter);

Moves forward to the next visible word end. (If `iter` is currently on a word end, moves forward to the next one after that.) Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` moved and is not the end iterator

Since 2.4

### gtk_text_iter_backward_visible_word_start ()

    gboolean            gtk_text_iter_backward_visible_word_start
                                                            (GtkTextIter *iter);

Moves backward to the previous visible word start. (If `iter` is currently on a word start, moves backward to the next one after that.) Word breaks are determined by Pango and should be correct for nearly any language (if not, the correct fix would be to the Pango word break algorithms).

`iter` : | a GtkTextIter
Returns : | `TRUE` if `iter` moved and is not the end iterator

Since 2.4

### gtk_text_iter_forward_visible_cursor_position ()

    gboolean            gtk_text_iter_forward_visible_cursor_position
                                                            (GtkTextIter *iter);

Moves `iter` forward to the next visible cursor position. See `gtk_text_iter_forward_cursor_position()` for details.

`iter` : | a GtkTextIter
Returns : | `TRUE` if we moved and the new position is dereferenceable

Since 2.4

### gtk_text_iter_backward_visible_cursor_position ()

    gboolean            gtk_text_iter_backward_visible_cursor_position
                                                            (GtkTextIter *iter);

Moves `iter` forward to the previous visible cursor position. See `gtk_text_iter_backward_cursor_position()` for details.

`iter` : | a GtkTextIter
Returns : | `TRUE` if we moved and the new position is dereferenceable

Since 2.4

### gtk_text_iter_forward_visible_cursor_positions ()

    gboolean            gtk_text_iter_forward_visible_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);

Moves up to `count` visible cursor positions. See `gtk_text_iter_forward_cursor_position()` for details.

`iter` : | a GtkTextIter
`count` : | number of positions to move
Returns : | `TRUE` if we moved and the new position is dereferenceable

Since 2.4

### gtk_text_iter_backward_visible_cursor_positions ()

    gboolean            gtk_text_iter_backward_visible_cursor_positions
                                                            (GtkTextIter *iter,
                                                             gint count);

Moves up to `count` visible cursor positions. See `gtk_text_iter_backward_cursor_position()` for details.

`iter` : | a GtkTextIter
`count` : | number of positions to move
Returns : | `TRUE` if we moved and the new position is dereferenceable

Since 2.4

### gtk_text_iter_forward_visible_line ()

    gboolean            gtk_text_iter_forward_visible_line  (GtkTextIter *iter);

Moves `iter` to the start of the next visible line. Returns `TRUE` if there was a next line to move to, and `FALSE` if `iter` was simply moved to the end of the buffer and is now not dereferenceable, or if `iter` was already at the end of the buffer.

`iter` : | an iterator
Returns : | whether `iter` can be dereferenced

Since 2.8

### gtk_text_iter_backward_visible_line ()

    gboolean            gtk_text_iter_backward_visible_line (GtkTextIter *iter);

Moves `iter` to the start of the previous visible line. Returns `TRUE` if `iter` could be moved; i.e. if `iter` was at character offset 0, this function returns `FALSE`. Therefore if `iter` was already on line 0, but not at the start of the line, `iter` is snapped to the start of the line and the function returns `TRUE`. (Note that this implies that in a loop calling this function, the line number may not change on every iteration, if your first iteration is on line 0.)

`iter` : | an iterator
Returns : | whether `iter` moved

Since 2.8

### gtk_text_iter_forward_visible_lines ()

    gboolean            gtk_text_iter_forward_visible_lines (GtkTextIter *iter,
                                                             gint count);

Moves `count` visible lines forward, if possible (if `count` would move past the start or end of the buffer, moves to the start or end of the buffer). The return value indicates whether the iterator moved onto a dereferenceable position; if the iterator didn't move, or moved onto the end iterator, then `FALSE` is returned. If `count` is 0, the function does nothing and returns `FALSE`. If `count` is negative, moves backward by 0 - `count` lines.

`iter` : | a GtkTextIter
`count` : | number of lines to move forward
Returns : | whether `iter` moved and is dereferenceable

Since 2.8

### gtk_text_iter_backward_visible_lines ()

    gboolean            gtk_text_iter_backward_visible_lines
                                                            (GtkTextIter *iter,
                                                             gint count);

Moves `count` visible lines backward, if possible (if `count` would move past the start or end of the buffer, moves to the start or end of the buffer). The return value indicates whether the iterator moved onto a dereferenceable position; if the iterator didn't move, or moved onto the end iterator, then `FALSE` is returned. If `count` is 0, the function does nothing and returns `FALSE`. If `count` is negative, moves forward by 0 - `count` lines.

`iter` : | a GtkTextIter
`count` : | number of lines to move backward
Returns : | whether `iter` moved and is dereferenceable

Since 2.8

### gtk_text_iter_set_offset ()

    void                gtk_text_iter_set_offset            (GtkTextIter *iter,
                                                             gint char_offset);

Sets `iter` to point to `char_offset`. `char_offset` counts from the start of the entire text buffer, starting with 0.

`iter` : | a GtkTextIter
`char_offset` : | a character number

### gtk_text_iter_set_line ()

    void                gtk_text_iter_set_line              (GtkTextIter *iter,
                                                             gint line_number);

Moves iterator `iter` to the start of the line `line_number`. If `line_number` is negative or larger than the number of lines in the buffer, moves `iter` to the start of the last line in the buffer.

`iter` : | a GtkTextIter
`line_number` : | line number (counted from 0)

### gtk_text_iter_set_line_offset ()

    void                gtk_text_iter_set_line_offset       (GtkTextIter *iter,
                                                             gint char_on_line);

Moves `iter` within a line, to a new character (not byte) offset. The given character offset must be less than or equal to the number of characters in the line; if equal, `iter` moves to the start of the next line. See `gtk_text_iter_set_line_index()` if you have a byte index rather than a character offset.

`iter` : | a GtkTextIter
`char_on_line` : | a character offset relative to the start of `iter`'s current line

### gtk_text_iter_set_line_index ()

    void                gtk_text_iter_set_line_index        (GtkTextIter *iter,
                                                             gint byte_on_line);

Same as `gtk_text_iter_set_line_offset()`, but works with a byte index. The given byte index must be at the start of a character, it can't be in the middle of a UTF-8 encoded character.

`iter` : | a GtkTextIter
`byte_on_line` : | a byte index relative to the start of `iter`'s current line

### gtk_text_iter_set_visible_line_index ()

    void                gtk_text_iter_set_visible_line_index
                                                            (GtkTextIter *iter,
                                                             gint byte_on_line);

Like `gtk_text_iter_set_line_index()`, but the index is in visible bytes, i.e. text with a tag making it invisible is not counted in the index.

`iter` : | a GtkTextIter
`byte_on_line` : | a byte index

### gtk_text_iter_set_visible_line_offset ()

    void                gtk_text_iter_set_visible_line_offset
                                                            (GtkTextIter *iter,
                                                             gint char_on_line);

Like `gtk_text_iter_set_line_offset()`, but the offset is in visible characters, i.e. text with a tag making it invisible is not counted in the offset.

`iter` : | a GtkTextIter
`char_on_line` : | a character offset

### gtk_text_iter_forward_to_end ()

    void                gtk_text_iter_forward_to_end        (GtkTextIter *iter);

Moves `iter` forward to the "end iterator," which points one past the last valid character in the buffer. `gtk_text_iter_get_char()` called on the end iterator returns 0, which is convenient for writing loops.

`iter` : | a GtkTextIter

### gtk_text_iter_forward_to_line_end ()

    gboolean            gtk_text_iter_forward_to_line_end   (GtkTextIter *iter);

Moves the iterator to point to the paragraph delimiter characters, which will be either a newline, a carriage return, a carriage return/newline in sequence, or the Unicode paragraph separator character. If the iterator is already at the paragraph delimiter characters, moves to the paragraph delimiter characters for the next line. If `iter` is on the last line in the buffer, which does not end in paragraph delimiters, moves to the end iterator (end of the last line), and returns `FALSE`.

`iter` : | a GtkTextIter
Returns : | `TRUE` if we moved and the new location is not the end iterator

### gtk_text_iter_forward_to_tag_toggle ()

    gboolean            gtk_text_iter_forward_to_tag_toggle (GtkTextIter *iter,
                                                             GtkTextTag *tag);

Moves forward to the next toggle (on or off) of the GtkTextTag `tag`, or to the next toggle of any tag if `tag` is `NULL`. If no matching tag toggles are found, returns `FALSE`, otherwise `TRUE`. Does not return toggles located at `iter`, only toggles after `iter`. Sets `iter` to the location of the toggle, or to the end of the buffer if no toggle is found.

`iter` : | a GtkTextIter
`tag` : | a GtkTextTag, or `NULL`. [allow-none]
Returns : | whether we found a tag toggle after `iter`

### gtk_text_iter_backward_to_tag_toggle ()

    gboolean            gtk_text_iter_backward_to_tag_toggle
                                                            (GtkTextIter *iter,
                                                             GtkTextTag *tag);

Moves backward to the next toggle (on or off) of the GtkTextTag `tag`, or to the next toggle of any tag if `tag` is `NULL`. If no matching tag toggles are found, returns `FALSE`, otherwise `TRUE`. Does not return toggles located at `iter`, only toggles before `iter`. Sets `iter` to the location of the toggle, or the start of the buffer if no toggle is found.

`iter` : | a GtkTextIter
`tag` : | a GtkTextTag, or `NULL`. [allow-none]
Returns : | whether we found a tag toggle before `iter`

### GtkTextCharPredicate ()

    gboolean            (*GtkTextCharPredicate)             (gunichar ch,
                                                             gpointer user_data);

### gtk_text_iter_forward_find_char ()

    gboolean            gtk_text_iter_forward_find_char     (GtkTextIter *iter,
                                                             GtkTextCharPredicate pred,
                                                             gpointer user_data,
                                                             const GtkTextIter *limit);

Advances `iter`, calling `pred` on each character. If `pred` returns `TRUE`, returns `TRUE` and stops scanning. If `pred` never returns `TRUE`, `iter` is set to `limit` if `limit` is non-`NULL`, otherwise to the end iterator.

`iter` : | a GtkTextIter
`pred` : | a function to be called on each character. [scope call]
`user_data` : | user data for `pred`
`limit` : | search limit, or `NULL` for none. [allow-none]
Returns : | whether a match was found

### gtk_text_iter_backward_find_char ()

    gboolean            gtk_text_iter_backward_find_char    (GtkTextIter *iter,
                                                             GtkTextCharPredicate pred,
                                                             gpointer user_data,
                                                             const GtkTextIter *limit);

Same as `gtk_text_iter_forward_find_char()`, but goes backward from `iter`.

`iter` : | a GtkTextIter
`pred` : | function to be called on each character. [scope call]
`user_data` : | user data for `pred`
`limit` : | search limit, or `NULL` for none. [allow-none]
Returns : | whether a match was found

### enum GtkTextSearchFlags

    typedef enum {
      GTK_TEXT_SEARCH_VISIBLE_ONLY     = 1 << 0,
      GTK_TEXT_SEARCH_TEXT_ONLY        = 1 << 1,
      GTK_TEXT_SEARCH_CASE_INSENSITIVE = 1 << 2
      /* Possible future plans: SEARCH_REGEXP */
    } GtkTextSearchFlags;

Flags affecting how a search is done.

If neither GTK_TEXT_SEARCH_VISIBLE_ONLY nor GTK_TEXT_SEARCH_TEXT_ONLY are enabled, the match must be exact; the special 0xFFFC character will match embedded pixbufs or child widgets.

`GTK_TEXT_SEARCH_VISIBLE_ONLY` | Search only visible data. A search match may have invisible text interspersed.
`GTK_TEXT_SEARCH_TEXT_ONLY` | Search only text. A match may have pixbufs or child widgets mixed inside the matched range.
`GTK_TEXT_SEARCH_CASE_INSENSITIVE` | The text will be matched regardless of what case it is in.

### gtk_text_iter_forward_search ()

    gboolean            gtk_text_iter_forward_search        (const GtkTextIter *iter,
                                                             const gchar *str,
                                                             GtkTextSearchFlags flags,
                                                             GtkTextIter *match_start,
                                                             GtkTextIter *match_end,
                                                             const GtkTextIter *limit);

Searches forward for `str`. Any match is returned by setting `match_start` to the first character of the match and `match_end` to the first character after the match. The search will not continue past `limit`. Note that a search is a linear or O(n) operation, so you may wish to use `limit` to avoid locking up your UI on large buffers.

`match_start` will never be set to a GtkTextIter located before `iter`, even if there is a possible `match_end` after or at `iter`.

`iter` : | start of search
`str` : | a search string
`flags` : | flags affecting how the search is done
`match_start` : | return location for start of match, or `NULL`. [out caller-allocates][allow-none]
`match_end` : | return location for end of match, or `NULL`. [out caller-allocates][allow-none]
`limit` : | location of last possible `match_end`, or `NULL` for the end of the buffer. [allow-none]
Returns : | whether a match was found

### gtk_text_iter_backward_search ()

    gboolean            gtk_text_iter_backward_search       (const GtkTextIter *iter,
                                                             const gchar *str,
                                                             GtkTextSearchFlags flags,
                                                             GtkTextIter *match_start,
                                                             GtkTextIter *match_end,
                                                             const GtkTextIter *limit);

Same as `gtk_text_iter_forward_search()`, but moves backward.

`match_end` will never be set to a GtkTextIter located after `iter`, even if there is a possible `match_start` before or at `iter`.

`iter` : | a GtkTextIter where the search begins
`str` : | search string
`flags` : | bitmask of flags affecting the search
`match_start` : | return location for start of match, or `NULL`. [out caller-allocates][allow-none]
`match_end` : | return location for end of match, or `NULL`. [out caller-allocates][allow-none]
`limit` : | location of last possible `match_start`, or `NULL` for start of buffer. [allow-none]
Returns : | whether a match was found

### gtk_text_iter_equal ()

    gboolean            gtk_text_iter_equal                 (const GtkTextIter *lhs,
                                                             const GtkTextIter *rhs);

Tests whether two iterators are equal, using the fastest possible mechanism. This function is very fast; you can expect it to perform better than e.g. getting the character offset for each iterator and comparing the offsets yourself. Also, it's a bit faster than `gtk_text_iter_compare()`.

`lhs` : | a GtkTextIter
`rhs` : | another GtkTextIter
Returns : | `TRUE` if the iterators point to the same place in the buffer

### gtk_text_iter_compare ()

    gint                gtk_text_iter_compare               (const GtkTextIter *lhs,
                                                             const GtkTextIter *rhs);

A `qsort()`-style function that returns negative if `lhs` is less than `rhs`, positive if `lhs` is greater than `rhs`, and 0 if they're equal. Ordering is in character offset order, i.e. the first character in the buffer is less than the second character in the buffer.

`lhs` : | a GtkTextIter
`rhs` : | another GtkTextIter
Returns : | -1 if `lhs` is less than `rhs`, 1 if `lhs` is greater, 0 if they are equal

### gtk_text_iter_in_range ()

    gboolean            gtk_text_iter_in_range              (const GtkTextIter *iter,
                                                             const GtkTextIter *start,
                                                             const GtkTextIter *end);

Checks whether `iter` falls in the range [`start`, `end`). `start` and `end` must be in ascending order.

`iter` : | a GtkTextIter
`start` : | start of range
`end` : | end of range
Returns : | `TRUE` if `iter` is in the range

### gtk_text_iter_order ()

    void                gtk_text_iter_order                 (GtkTextIter *first,
                                                             GtkTextIter *second);

Swaps the value of `first` and `second` if `second` comes before `first` in the buffer. That is, ensures that `first` and `second` are in sequence. Most text buffer functions that take a range call this automatically on your behalf, so there's no real reason to call it yourself in those cases. There are some exceptions, such as `gtk_text_iter_in_range()`, that expect a pre-sorted range.

`first` : | a GtkTextIter
`second` : | another GtkTextIter