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.
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.
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 .
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).
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).
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.
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.
Returns:
Whether movement was possible.
bool Gtk::TextIter::backward_chars
(
int
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.
Parameters:
count
Number of characters to move.
Returns:
Whether iter moved and is dereferenceable.
bool Gtk::TextIter::backward_cursor_position
(
)
Like gtk_text_iter_forward_cursor_position(), but moves backward.
Returns:
true if we moved.
bool Gtk::TextIter::backward_cursor_positions
(
int
count
)
Moves up to count cursor positions.
See gtk_text_iter_forward_cursor_position() for details.
Parameters:
count
Number of positions to move.
Returns:
true if we moved and the new position is dereferenceable.
template <class Predicate>
bool Gtk::TextIter::backward_find_char
(
const Predicate&
predicate
)
template <class Predicate>
bool Gtk::TextIter::backward_find_char
(
const Predicate&
predicate,
const TextIter&
limit
)
bool Gtk::TextIter::backward_line
(
)
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.)
Returns:
Whether iter moved.
bool Gtk::TextIter::backward_lines
(
int
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.
Same as gtk_text_iter_forward_search(), but moves backward.
Parameters:
str
Search string.
flags
Bitmask of flags affecting the search.
match_start
Return location for start of match, or 0.
match_end
Return location for end of match, or 0.
limit
Location of last possible match_start , or 0 for start of buffer.
Returns:
Whether a match was found.
bool Gtk::TextIter::backward_sentence_start
(
)
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).
Returns:
true if iter moved and is not the end iterator.
bool Gtk::TextIter::backward_sentence_starts
(
int
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.
Moves backward to the next toggle (on or off) of the Gtk::TextTagtag , or to the next toggle of any tag if tag is 0.
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.
(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).
Returns:
true if iter moved and is not the end iterator.
bool Gtk::TextIter::backward_word_starts
(
int
count
)
Calls gtk_text_iter_backward_word_start() up to count times.
Returns true if tag is toggled on at exactly this point.
If tag is 0, returns true if any tag is toggled on at this point. Note that the gtk_text_iter_begins_tag() returns true if iter is the start of the tagged range; gtk_text_iter_has_tag() tells you whether an iterator is within a tagged range.
Whether iter is the start of a range tagged with tag .
bool Gtk::TextIter::can_insert
(
bool
default_editability = true
)
const
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::TextBuffer::insert_interactive() uses this function to decide whether insertions are allowed at a given position.
Parameters:
default_editability
true if text is editable by default.
Returns:
Whether text inserted at iter would be editable.
int Gtk::TextIter::compare
(
const TextIter&
rhs
)
const
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.
Parameters:
rhs
Another Gtk::TextIter.
Returns:
-1 if lhs is less than rhs , 1 if lhs is greater, 0 if they are equal.
bool Gtk::TextIter::editable
(
bool
default_setting = true
)
const
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 Gtk::TextView. 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.
Parameters:
default_setting
true if text is editable by default.
Returns:
Whether iter is inside an editable range.
bool Gtk::TextIter::ends_line
(
)
const
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.
Returns:
Whether iter is at the end of a line.
bool Gtk::TextIter::ends_sentence
(
)
const
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).
Returns true if tag is toggled off at exactly this point.
If tag is 0, returns true if any tag is toggled off at this point. Note that the gtk_text_iter_ends_tag() returns true if iter is the end of the tagged range; gtk_text_iter_has_tag() tells you whether an iterator is within a tagged range.
Whether iter is the end of a range tagged with tag .
bool Gtk::TextIter::ends_word
(
)
const
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).
Returns:
true if iter is at the end of a word.
bool Gtk::TextIter::forward_char
(
)
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.
Returns:
Whether iter moved and is dereferenceable.
bool Gtk::TextIter::forward_chars
(
int
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.
Parameters:
count
Number of characters to move, may be negative.
Returns:
Whether iter moved and is dereferenceable.
bool Gtk::TextIter::forward_cursor_position
(
)
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 Pango::LogAttr structure and pango_break() function.
Returns:
true if we moved and the new position is dereferenceable.
bool Gtk::TextIter::forward_cursor_positions
(
int
count
)
Moves up to count cursor positions.
See gtk_text_iter_forward_cursor_position() for details.
Parameters:
count
Number of positions to move.
Returns:
true if we moved and the new position is dereferenceable.
template <class Predicate>
bool Gtk::TextIter::forward_find_char
(
const Predicate&
predicate
)
template <class Predicate>
bool Gtk::TextIter::forward_find_char
(
const Predicate&
predicate,
const TextIter&
limit
)
bool Gtk::TextIter::forward_line
(
)
Moves iter to the start of the next 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.
Returns:
Whether iter can be dereferenced.
bool Gtk::TextIter::forward_lines
(
int
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.
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.
If the Gtk::TEXT_SEARCH_VISIBLE_ONLY flag is present, the match may have invisible text interspersed in str . i.e. str will be a possibly-noncontiguous subsequence of the matched range. similarly, if you specify Gtk::TEXT_SEARCH_TEXT_ONLY, the match may have pixbufs or child widgets mixed inside the matched range. If these flags are not given, the match must be exact; the special 0xFFFC character in str will match embedded pixbufs or child widgets.
Parameters:
str
A search string.
flags
Flags affecting how the search is done.
match_start
Return location for start of match, or 0.
match_end
Return location for end of match, or 0.
limit
Bound for the search, or 0 for the end of the buffer.
Returns:
Whether a match was found.
bool Gtk::TextIter::forward_sentence_end
(
)
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).
Returns:
true if iter moved and is not the end iterator.
bool Gtk::TextIter::forward_sentence_ends
(
int
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.
Parameters:
count
Number of sentences to move.
Returns:
true if iter moved and is not the end iterator.
void Gtk::TextIter::forward_to_end
(
)
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.
bool Gtk::TextIter::forward_to_line_end
(
)
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.
Returns:
true if we moved and the new location is not the end iterator.
Moves forward to the next toggle (on or off) of the Gtk::TextTagtag , or to the next toggle of any tag if tag is 0.
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.
(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).
Returns:
true if iter moved and is not the end iterator.
bool Gtk::TextIter::forward_word_ends
(
int
count
)
Calls gtk_text_iter_forward_word_end() up to count times.
Returns the Gtk::TextBuffer this iterator is associated with.
Returns:
The buffer.
int Gtk::TextIter::get_bytes_in_line
(
)
const
Returns the number of bytes in the line containing iter , including the paragraph delimiters.
Returns:
Number of bytes in the line.
gunichar Gtk::TextIter::get_char
(
)
const
Returns the Unicode character at this iterator.
(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.
Returns:
A Unicode character, or 0 if iter is not dereferenceable.
int Gtk::TextIter::get_chars_in_line
(
)
const
Returns the number of characters in the line containing iter , including the paragraph delimiters.
Returns a list of all Gtk::TextMark 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.
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.
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().
Returns a list of Gtk::TextTag 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.
Parameters:
toggled_on
true to get toggled-on tags.
Returns:
Tags toggled at this point.
int Gtk::TextIter::get_visible_line_index
(
)
const
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.
Returns:
Byte index of iter with respect to the start of the line.
int Gtk::TextIter::get_visible_line_offset
(
)
const
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.
Returns:
Offset in visible characters from the start of the line.
Checks whether iter falls in the range [ start , end ).
start and end must be in ascending order.
Parameters:
start
Start of range.
end
End of range.
Returns:
true if iter is in the range.
bool Gtk::TextIter::inside_sentence
(
)
const
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).
Returns:
true if iter is inside a sentence.
bool Gtk::TextIter::inside_word
(
)
const
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).
Returns:
true if iter is inside a word.
bool Gtk::TextIter::is_cursor_position
(
)
const
See gtk_text_iter_forward_cursor_position() or Pango::LogAttr or pango_break() for details on what a cursor position is.
Returns:
true if the cursor can be placed at iter .
bool Gtk::TextIter::is_end
(
)
const
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.
Returns:
Whether iter is the end iterator.
bool Gtk::TextIter::is_start
(
)
const
Returns true if iter is the first iterator in the buffer, that is if iter has a character offset of 0.
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.
Parameters:
second
Another Gtk::TextIter.
void Gtk::TextIter::set_line
(
int
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.
Parameters:
line_number
Line number (counted from 0).
void Gtk::TextIter::set_line_index
(
int
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.
Parameters:
byte_on_line
A byte index relative to the start of iter 's current line.
void Gtk::TextIter::set_line_offset
(
int
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.
Parameters:
char_on_line
A character offset relative to the start of iter 's current line.
void Gtk::TextIter::set_offset
(
int
char_offset
)
Sets iter to point to char_offset .
char_offset counts from the start of the entire text buffer, starting with 0.
Parameters:
char_offset
A character number.
void Gtk::TextIter::set_visible_line_index
(
int
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.
Parameters:
byte_on_line
A byte index.
void Gtk::TextIter::set_visible_line_offset
(
int
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.
Parameters:
char_on_line
A character offset.
bool Gtk::TextIter::starts_line
(
)
const
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.
Returns:
Whether iter begins a line.
bool Gtk::TextIter::starts_sentence
(
)
const
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).
Returns:
true if iter is at the start of a sentence.
bool Gtk::TextIter::starts_word
(
)
const
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).
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 .
