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// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT
#[cfg(any(feature = "v1_46", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_46")))]
use crate::Direction;
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
use crate::LayoutSerializeFlags;
use crate::{
Alignment, AttrList, Context, EllipsizeMode, FontDescription, LayoutIter, LayoutLine,
Rectangle, TabArray, WrapMode,
};
use glib::translate::*;
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
use std::ptr;
use std::{fmt, mem};
glib::wrapper! {
/// A [`Layout`][crate::Layout] structure represents an entire paragraph of text.
///
/// While complete access to the layout capabilities of Pango is provided
/// using the detailed interfaces for itemization and shaping, using
/// that functionality directly involves writing a fairly large amount
/// of code. [`Layout`][crate::Layout] provides a high-level driver for formatting
/// entire paragraphs of text at once. This includes paragraph-level
/// functionality such as line breaking, justification, alignment and
/// ellipsization.
///
/// A [`Layout`][crate::Layout] is initialized with a [`Context`][crate::Context], UTF-8 string
/// and set of attributes for that string. Once that is done, the set of
/// formatted lines can be extracted from the object, the layout can be
/// rendered, and conversion between logical character positions within
/// the layout's text, and the physical position of the resulting glyphs
/// can be made.
///
/// There are a number of parameters to adjust the formatting of a
/// [`Layout`][crate::Layout]. The following image shows adjustable parameters
/// (on the left) and font metrics (on the right):
///
/// <picture>
/// <source srcset="layout-dark.png" media="(prefers-color-scheme: dark)">
/// <img alt="Pango Layout Parameters" src="layout-light.png">
/// </picture>
///
/// The following images demonstrate the effect of alignment and
/// justification on the layout of text:
///
/// | | |
/// | --- | --- |
/// |  |  |
/// |  |  |
/// |  |  |
///
///
/// It is possible, as well, to ignore the 2-D setup,
/// and simply treat the results of a [`Layout`][crate::Layout] as a list of lines.
#[doc(alias = "PangoLayout")]
pub struct Layout(Object<ffi::PangoLayout, ffi::PangoLayoutClass>);
match fn {
type_ => || ffi::pango_layout_get_type(),
}
}
impl Layout {
/// Create a new [`Layout`][crate::Layout] object with attributes initialized to
/// default values for a particular [`Context`][crate::Context].
/// ## `context`
/// a [`Context`][crate::Context]
///
/// # Returns
///
/// the newly allocated [`Layout`][crate::Layout]
#[doc(alias = "pango_layout_new")]
pub fn new(context: &Context) -> Layout {
unsafe { from_glib_full(ffi::pango_layout_new(context.to_glib_none().0)) }
}
/// Forces recomputation of any state in the [`Layout`][crate::Layout] that
/// might depend on the layout's context.
///
/// This function should be called if you make changes to the context
/// subsequent to creating the layout.
#[doc(alias = "pango_layout_context_changed")]
pub fn context_changed(&self) {
unsafe {
ffi::pango_layout_context_changed(self.to_glib_none().0);
}
}
#[doc(alias = "pango_layout_copy")]
#[must_use]
pub fn copy(&self) -> Layout {
unsafe { from_glib_full(ffi::pango_layout_copy(self.to_glib_none().0)) }
}
/// Gets the alignment for the layout: how partial lines are
/// positioned within the horizontal space available.
///
/// # Returns
///
/// the alignment
#[doc(alias = "pango_layout_get_alignment")]
#[doc(alias = "get_alignment")]
pub fn alignment(&self) -> Alignment {
unsafe { from_glib(ffi::pango_layout_get_alignment(self.to_glib_none().0)) }
}
/// Gets the attribute list for the layout, if any.
///
/// # Returns
///
/// a [`AttrList`][crate::AttrList]
#[doc(alias = "pango_layout_get_attributes")]
#[doc(alias = "get_attributes")]
pub fn attributes(&self) -> Option<AttrList> {
unsafe { from_glib_none(ffi::pango_layout_get_attributes(self.to_glib_none().0)) }
}
/// Gets whether to calculate the base direction for the layout
/// according to its contents.
///
/// See [`set_auto_dir()`][Self::set_auto_dir()].
///
/// # Returns
///
/// [`true`] if the bidirectional base direction
/// is computed from the layout's contents, [`false`] otherwise
#[doc(alias = "pango_layout_get_auto_dir")]
#[doc(alias = "get_auto_dir")]
pub fn is_auto_dir(&self) -> bool {
unsafe { from_glib(ffi::pango_layout_get_auto_dir(self.to_glib_none().0)) }
}
/// Gets the Y position of baseline of the first line in @self.
///
/// # Returns
///
/// baseline of first line, from top of @self
#[doc(alias = "pango_layout_get_baseline")]
#[doc(alias = "get_baseline")]
pub fn baseline(&self) -> i32 {
unsafe { ffi::pango_layout_get_baseline(self.to_glib_none().0) }
}
/// Given an index within a layout, determines the positions that of the
/// strong and weak cursors if the insertion point is at that index.
///
/// This is a variant of [`cursor_pos()`][Self::cursor_pos()] that applies
/// font metric information about caret slope and offset to the positions
/// it returns.
///
/// <picture>
/// <source srcset="caret-metrics-dark.png" media="(prefers-color-scheme: dark)">
/// <img alt="Caret metrics" src="caret-metrics-light.png">
/// </picture>
/// ## `index_`
/// the byte index of the cursor
///
/// # Returns
///
///
/// ## `strong_pos`
/// location to store the strong cursor position
///
/// ## `weak_pos`
/// location to store the weak cursor position
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
#[doc(alias = "pango_layout_get_caret_pos")]
#[doc(alias = "get_caret_pos")]
pub fn caret_pos(&self, index_: i32) -> (Rectangle, Rectangle) {
unsafe {
let mut strong_pos = Rectangle::uninitialized();
let mut weak_pos = Rectangle::uninitialized();
ffi::pango_layout_get_caret_pos(
self.to_glib_none().0,
index_,
strong_pos.to_glib_none_mut().0,
weak_pos.to_glib_none_mut().0,
);
(strong_pos, weak_pos)
}
}
/// Returns the number of Unicode characters in the
/// the text of @self.
///
/// # Returns
///
/// the number of Unicode characters
/// in the text of @self
#[doc(alias = "pango_layout_get_character_count")]
#[doc(alias = "get_character_count")]
pub fn character_count(&self) -> i32 {
unsafe { ffi::pango_layout_get_character_count(self.to_glib_none().0) }
}
/// Retrieves the [`Context`][crate::Context] used for this layout.
///
/// # Returns
///
/// the [`Context`][crate::Context] for the layout
#[doc(alias = "pango_layout_get_context")]
#[doc(alias = "get_context")]
pub fn context(&self) -> Context {
unsafe { from_glib_none(ffi::pango_layout_get_context(self.to_glib_none().0)) }
}
/// Given an index within a layout, determines the positions that of the
/// strong and weak cursors if the insertion point is at that index.
///
/// The position of each cursor is stored as a zero-width rectangle
/// with the height of the run extents.
///
/// <picture>
/// <source srcset="cursor-positions-dark.png" media="(prefers-color-scheme: dark)">
/// <img alt="Cursor positions" src="cursor-positions-light.png">
/// </picture>
///
/// The strong cursor location is the location where characters of the
/// directionality equal to the base direction of the layout are inserted.
/// The weak cursor location is the location where characters of the
/// directionality opposite to the base direction of the layout are inserted.
///
/// The following example shows text with both a strong and a weak cursor.
///
/// <picture>
/// <source srcset="split-cursor-dark.png" media="(prefers-color-scheme: dark)">
/// <img alt="Strong and weak cursors" src="split-cursor-light.png">
/// </picture>
///
/// The strong cursor has a little arrow pointing to the right, the weak
/// cursor to the left. Typing a 'c' in this situation will insert the
/// character after the 'b', and typing another Hebrew character, like 'ג',
/// will insert it at the end.
/// ## `index_`
/// the byte index of the cursor
///
/// # Returns
///
///
/// ## `strong_pos`
/// location to store the strong cursor position
///
/// ## `weak_pos`
/// location to store the weak cursor position
#[doc(alias = "pango_layout_get_cursor_pos")]
#[doc(alias = "get_cursor_pos")]
pub fn cursor_pos(&self, index_: i32) -> (Rectangle, Rectangle) {
unsafe {
let mut strong_pos = Rectangle::uninitialized();
let mut weak_pos = Rectangle::uninitialized();
ffi::pango_layout_get_cursor_pos(
self.to_glib_none().0,
index_,
strong_pos.to_glib_none_mut().0,
weak_pos.to_glib_none_mut().0,
);
(strong_pos, weak_pos)
}
}
/// Gets the text direction at the given character position in @self.
/// ## `index`
/// the byte index of the char
///
/// # Returns
///
/// the text direction at @index
#[cfg(any(feature = "v1_46", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_46")))]
#[doc(alias = "pango_layout_get_direction")]
#[doc(alias = "get_direction")]
pub fn direction(&self, index: i32) -> Direction {
unsafe {
from_glib(ffi::pango_layout_get_direction(
self.to_glib_none().0,
index,
))
}
}
/// Gets the type of ellipsization being performed for @self.
///
/// See [`set_ellipsize()`][Self::set_ellipsize()].
///
/// Use [`is_ellipsized()`][Self::is_ellipsized()] to query whether any
/// paragraphs were actually ellipsized.
///
/// # Returns
///
/// the current ellipsization mode for @self
#[doc(alias = "pango_layout_get_ellipsize")]
#[doc(alias = "get_ellipsize")]
pub fn ellipsize(&self) -> EllipsizeMode {
unsafe { from_glib(ffi::pango_layout_get_ellipsize(self.to_glib_none().0)) }
}
/// Computes the logical and ink extents of @self.
///
/// Logical extents are usually what you want for positioning things. Note
/// that both extents may have non-zero x and y. You may want to use those
/// to offset where you render the layout. Not doing that is a very typical
/// bug that shows up as right-to-left layouts not being correctly positioned
/// in a layout with a set width.
///
/// The extents are given in layout coordinates and in Pango units; layout
/// coordinates begin at the top left corner of the layout.
///
/// # Returns
///
///
/// ## `ink_rect`
/// rectangle used to store the extents of the
/// layout as drawn
///
/// ## `logical_rect`
/// rectangle used to store the logical
/// extents of the layout
#[doc(alias = "pango_layout_get_extents")]
#[doc(alias = "get_extents")]
pub fn extents(&self) -> (Rectangle, Rectangle) {
unsafe {
let mut ink_rect = Rectangle::uninitialized();
let mut logical_rect = Rectangle::uninitialized();
ffi::pango_layout_get_extents(
self.to_glib_none().0,
ink_rect.to_glib_none_mut().0,
logical_rect.to_glib_none_mut().0,
);
(ink_rect, logical_rect)
}
}
/// Gets the font description for the layout, if any.
///
/// # Returns
///
/// a pointer to the
/// layout's font description, or [`None`] if the font description
/// from the layout's context is inherited.
#[doc(alias = "pango_layout_get_font_description")]
#[doc(alias = "get_font_description")]
pub fn font_description(&self) -> Option<FontDescription> {
unsafe {
from_glib_none(ffi::pango_layout_get_font_description(
self.to_glib_none().0,
))
}
}
/// Gets the height of layout used for ellipsization.
///
/// See [`set_height()`][Self::set_height()] for details.
///
/// # Returns
///
/// the height, in Pango units if positive,
/// or number of lines if negative.
#[doc(alias = "pango_layout_get_height")]
#[doc(alias = "get_height")]
pub fn height(&self) -> i32 {
unsafe { ffi::pango_layout_get_height(self.to_glib_none().0) }
}
/// Gets the paragraph indent width in Pango units.
///
/// A negative value indicates a hanging indentation.
///
/// # Returns
///
/// the indent in Pango units
#[doc(alias = "pango_layout_get_indent")]
#[doc(alias = "get_indent")]
pub fn indent(&self) -> i32 {
unsafe { ffi::pango_layout_get_indent(self.to_glib_none().0) }
}
/// Returns an iterator to iterate over the visual extents of the layout.
///
/// # Returns
///
/// the new [`LayoutIter`][crate::LayoutIter]
#[doc(alias = "pango_layout_get_iter")]
#[doc(alias = "get_iter")]
pub fn iter(&self) -> LayoutIter {
unsafe { from_glib_full(ffi::pango_layout_get_iter(self.to_glib_none().0)) }
}
/// Gets whether each complete line should be stretched to fill the entire
/// width of the layout.
///
/// # Returns
///
/// the justify value
#[doc(alias = "pango_layout_get_justify")]
#[doc(alias = "get_justify")]
pub fn is_justify(&self) -> bool {
unsafe { from_glib(ffi::pango_layout_get_justify(self.to_glib_none().0)) }
}
/// Gets whether the last line should be stretched
/// to fill the entire width of the layout.
///
/// # Returns
///
/// the justify value
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
#[doc(alias = "pango_layout_get_justify_last_line")]
#[doc(alias = "get_justify_last_line")]
pub fn is_justify_last_line(&self) -> bool {
unsafe {
from_glib(ffi::pango_layout_get_justify_last_line(
self.to_glib_none().0,
))
}
}
/// Retrieves a particular line from a [`Layout`][crate::Layout].
///
/// Use the faster [`line_readonly()`][Self::line_readonly()] if you do not
/// plan to modify the contents of the line (glyphs, glyph widths, etc.).
/// ## `line`
/// the index of a line, which must be between 0 and
/// `pango_layout_get_line_count(layout) - 1`, inclusive.
///
/// # Returns
///
/// the requested [`LayoutLine`][crate::LayoutLine],
/// or [`None`] if the index is out of range. This layout line can be ref'ed
/// and retained, but will become invalid if changes are made to the
/// [`Layout`][crate::Layout].
#[doc(alias = "pango_layout_get_line")]
#[doc(alias = "get_line")]
pub fn line(&self, line: i32) -> Option<LayoutLine> {
unsafe { from_glib_none(ffi::pango_layout_get_line(self.to_glib_none().0, line)) }
}
/// Retrieves the count of lines for the @self.
///
/// # Returns
///
/// the line count
#[doc(alias = "pango_layout_get_line_count")]
#[doc(alias = "get_line_count")]
pub fn line_count(&self) -> i32 {
unsafe { ffi::pango_layout_get_line_count(self.to_glib_none().0) }
}
/// Retrieves a particular line from a [`Layout`][crate::Layout].
///
/// This is a faster alternative to [`line()`][Self::line()],
/// but the user is not expected to modify the contents of the line
/// (glyphs, glyph widths, etc.).
/// ## `line`
/// the index of a line, which must be between 0 and
/// `pango_layout_get_line_count(layout) - 1`, inclusive.
///
/// # Returns
///
/// the requested [`LayoutLine`][crate::LayoutLine],
/// or [`None`] if the index is out of range. This layout line can be ref'ed
/// and retained, but will become invalid if changes are made to the
/// [`Layout`][crate::Layout]. No changes should be made to the line.
#[doc(alias = "pango_layout_get_line_readonly")]
#[doc(alias = "get_line_readonly")]
pub fn line_readonly(&self, line: i32) -> Option<LayoutLine> {
unsafe {
from_glib_none(ffi::pango_layout_get_line_readonly(
self.to_glib_none().0,
line,
))
}
}
/// Gets the line spacing factor of @self.
///
/// See [`set_line_spacing()`][Self::set_line_spacing()].
#[cfg(any(feature = "v1_44", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_44")))]
#[doc(alias = "pango_layout_get_line_spacing")]
#[doc(alias = "get_line_spacing")]
pub fn line_spacing(&self) -> f32 {
unsafe { ffi::pango_layout_get_line_spacing(self.to_glib_none().0) }
}
/// Returns the lines of the @self as a list.
///
/// Use the faster [`lines_readonly()`][Self::lines_readonly()] if you do not
/// plan to modify the contents of the lines (glyphs, glyph widths, etc.).
///
/// # Returns
///
/// a `GSList`
/// containing the lines in the layout. This points to internal data of the
/// [`Layout`][crate::Layout] and must be used with care. It will become invalid on any
/// change to the layout's text or properties.
#[doc(alias = "pango_layout_get_lines")]
#[doc(alias = "get_lines")]
pub fn lines(&self) -> Vec<LayoutLine> {
unsafe {
FromGlibPtrContainer::from_glib_none(ffi::pango_layout_get_lines(self.to_glib_none().0))
}
}
/// Returns the lines of the @self as a list.
///
/// This is a faster alternative to [`lines()`][Self::lines()],
/// but the user is not expected to modify the contents of the lines
/// (glyphs, glyph widths, etc.).
///
/// # Returns
///
/// a `GSList`
/// containing the lines in the layout. This points to internal data of the
/// [`Layout`][crate::Layout] and must be used with care. It will become invalid on any
/// change to the layout's text or properties. No changes should be made to
/// the lines.
#[doc(alias = "pango_layout_get_lines_readonly")]
#[doc(alias = "get_lines_readonly")]
pub fn lines_readonly(&self) -> Vec<LayoutLine> {
unsafe {
FromGlibPtrContainer::from_glib_none(ffi::pango_layout_get_lines_readonly(
self.to_glib_none().0,
))
}
}
//#[doc(alias = "pango_layout_get_log_attrs")]
//#[doc(alias = "get_log_attrs")]
//pub fn log_attrs(&self, attrs: /*Ignored*/Vec<LogAttr>) -> i32 {
// unsafe { TODO: call ffi:pango_layout_get_log_attrs() }
//}
//#[doc(alias = "pango_layout_get_log_attrs_readonly")]
//#[doc(alias = "get_log_attrs_readonly")]
//pub fn log_attrs_readonly(&self) -> /*Ignored*/Vec<LogAttr> {
// unsafe { TODO: call ffi:pango_layout_get_log_attrs_readonly() }
//}
/// Computes the logical and ink extents of @self in device units.
///
/// This function just calls [`extents()`][Self::extents()] followed by
/// two [`extents_to_pixels()`][crate::extents_to_pixels()] calls, rounding @ink_rect and @logical_rect
/// such that the rounded rectangles fully contain the unrounded one (that is,
/// passes them as first argument to [`extents_to_pixels()`][crate::extents_to_pixels()]).
///
/// # Returns
///
///
/// ## `ink_rect`
/// rectangle used to store the extents of the
/// layout as drawn
///
/// ## `logical_rect`
/// rectangle used to store the logical
/// extents of the layout
#[doc(alias = "pango_layout_get_pixel_extents")]
#[doc(alias = "get_pixel_extents")]
pub fn pixel_extents(&self) -> (Rectangle, Rectangle) {
unsafe {
let mut ink_rect = Rectangle::uninitialized();
let mut logical_rect = Rectangle::uninitialized();
ffi::pango_layout_get_pixel_extents(
self.to_glib_none().0,
ink_rect.to_glib_none_mut().0,
logical_rect.to_glib_none_mut().0,
);
(ink_rect, logical_rect)
}
}
/// Determines the logical width and height of a [`Layout`][crate::Layout] in device
/// units.
///
/// [`size()`][Self::size()] returns the width and height
/// scaled by `PANGO_SCALE`. This is simply a convenience function
/// around [`pixel_extents()`][Self::pixel_extents()].
///
/// # Returns
///
///
/// ## `width`
/// location to store the logical width
///
/// ## `height`
/// location to store the logical height
#[doc(alias = "pango_layout_get_pixel_size")]
#[doc(alias = "get_pixel_size")]
pub fn pixel_size(&self) -> (i32, i32) {
unsafe {
let mut width = mem::MaybeUninit::uninit();
let mut height = mem::MaybeUninit::uninit();
ffi::pango_layout_get_pixel_size(
self.to_glib_none().0,
width.as_mut_ptr(),
height.as_mut_ptr(),
);
(width.assume_init(), height.assume_init())
}
}
/// Returns the current serial number of @self.
///
/// The serial number is initialized to an small number larger than zero
/// when a new layout is created and is increased whenever the layout is
/// changed using any of the setter functions, or the [`Context`][crate::Context] it
/// uses has changed. The serial may wrap, but will never have the value 0.
/// Since it can wrap, never compare it with "less than", always use "not equals".
///
/// This can be used to automatically detect changes to a [`Layout`][crate::Layout],
/// and is useful for example to decide whether a layout needs redrawing.
/// To force the serial to be increased, use
/// [`context_changed()`][Self::context_changed()].
///
/// # Returns
///
/// The current serial number of @self.
#[doc(alias = "pango_layout_get_serial")]
#[doc(alias = "get_serial")]
pub fn serial(&self) -> u32 {
unsafe { ffi::pango_layout_get_serial(self.to_glib_none().0) }
}
/// Obtains whether @self is in single paragraph mode.
///
/// See [`set_single_paragraph_mode()`][Self::set_single_paragraph_mode()].
///
/// # Returns
///
/// [`true`] if the layout does not break paragraphs
/// at paragraph separator characters, [`false`] otherwise
#[doc(alias = "pango_layout_get_single_paragraph_mode")]
#[doc(alias = "get_single_paragraph_mode")]
pub fn is_single_paragraph_mode(&self) -> bool {
unsafe {
from_glib(ffi::pango_layout_get_single_paragraph_mode(
self.to_glib_none().0,
))
}
}
/// Determines the logical width and height of a [`Layout`][crate::Layout] in Pango
/// units.
///
/// This is simply a convenience function around [`extents()`][Self::extents()].
///
/// # Returns
///
///
/// ## `width`
/// location to store the logical width
///
/// ## `height`
/// location to store the logical height
#[doc(alias = "pango_layout_get_size")]
#[doc(alias = "get_size")]
pub fn size(&self) -> (i32, i32) {
unsafe {
let mut width = mem::MaybeUninit::uninit();
let mut height = mem::MaybeUninit::uninit();
ffi::pango_layout_get_size(
self.to_glib_none().0,
width.as_mut_ptr(),
height.as_mut_ptr(),
);
(width.assume_init(), height.assume_init())
}
}
/// Gets the amount of spacing between the lines of the layout.
///
/// # Returns
///
/// the spacing in Pango units
#[doc(alias = "pango_layout_get_spacing")]
#[doc(alias = "get_spacing")]
pub fn spacing(&self) -> i32 {
unsafe { ffi::pango_layout_get_spacing(self.to_glib_none().0) }
}
/// Gets the current [`TabArray`][crate::TabArray] used by this layout.
///
/// If no [`TabArray`][crate::TabArray] has been set, then the default tabs are
/// in use and [`None`] is returned. Default tabs are every 8 spaces.
///
/// The return value should be freed with `Pango::TabArray::free()`.
///
/// # Returns
///
/// a copy of the tabs for this layout
#[doc(alias = "pango_layout_get_tabs")]
#[doc(alias = "get_tabs")]
pub fn tabs(&self) -> Option<TabArray> {
unsafe { from_glib_full(ffi::pango_layout_get_tabs(self.to_glib_none().0)) }
}
/// Gets the text in the layout.
///
/// The returned text should not be freed or modified.
///
/// # Returns
///
/// the text in the @self
#[doc(alias = "pango_layout_get_text")]
#[doc(alias = "get_text")]
pub fn text(&self) -> glib::GString {
unsafe { from_glib_none(ffi::pango_layout_get_text(self.to_glib_none().0)) }
}
/// Counts the number of unknown glyphs in @self.
///
/// This function can be used to determine if there are any fonts
/// available to render all characters in a certain string, or when
/// used in combination with [`AttrType::Fallback`][crate::AttrType::Fallback], to check if a
/// certain font supports all the characters in the string.
///
/// # Returns
///
/// The number of unknown glyphs in @self
#[doc(alias = "pango_layout_get_unknown_glyphs_count")]
#[doc(alias = "get_unknown_glyphs_count")]
pub fn unknown_glyphs_count(&self) -> i32 {
unsafe { ffi::pango_layout_get_unknown_glyphs_count(self.to_glib_none().0) }
}
/// Gets the width to which the lines of the [`Layout`][crate::Layout] should wrap.
///
/// # Returns
///
/// the width in Pango units, or -1 if no width set.
#[doc(alias = "pango_layout_get_width")]
#[doc(alias = "get_width")]
pub fn width(&self) -> i32 {
unsafe { ffi::pango_layout_get_width(self.to_glib_none().0) }
}
/// Gets the wrap mode for the layout.
///
/// Use [`is_wrapped()`][Self::is_wrapped()] to query whether
/// any paragraphs were actually wrapped.
///
/// # Returns
///
/// active wrap mode.
#[doc(alias = "pango_layout_get_wrap")]
#[doc(alias = "get_wrap")]
pub fn wrap(&self) -> WrapMode {
unsafe { from_glib(ffi::pango_layout_get_wrap(self.to_glib_none().0)) }
}
/// Converts from byte @index_ within the @self to line and X position.
///
/// The X position is measured from the left edge of the line.
/// ## `index_`
/// the byte index of a grapheme within the layout
/// ## `trailing`
/// an integer indicating the edge of the grapheme to retrieve the
/// position of. If > 0, the trailing edge of the grapheme, if 0,
/// the leading of the grapheme
///
/// # Returns
///
///
/// ## `line`
/// location to store resulting line index. (which will
/// between 0 and pango_layout_get_line_count(layout) - 1)
///
/// ## `x_pos`
/// location to store resulting position within line
/// (`PANGO_SCALE` units per device unit)
#[doc(alias = "pango_layout_index_to_line_x")]
pub fn index_to_line_x(&self, index_: i32, trailing: bool) -> (i32, i32) {
unsafe {
let mut line = mem::MaybeUninit::uninit();
let mut x_pos = mem::MaybeUninit::uninit();
ffi::pango_layout_index_to_line_x(
self.to_glib_none().0,
index_,
trailing.into_glib(),
line.as_mut_ptr(),
x_pos.as_mut_ptr(),
);
(line.assume_init(), x_pos.assume_init())
}
}
/// Converts from an index within a [`Layout`][crate::Layout] to the onscreen position
/// corresponding to the grapheme at that index.
///
/// The returns is represented as rectangle. Note that `pos->x` is
/// always the leading edge of the grapheme and `pos->x + pos->width` the
/// trailing edge of the grapheme. If the directionality of the grapheme
/// is right-to-left, then `pos->width` will be negative.
/// ## `index_`
/// byte index within @self
///
/// # Returns
///
///
/// ## `pos`
/// rectangle in which to store the position of the grapheme
#[doc(alias = "pango_layout_index_to_pos")]
pub fn index_to_pos(&self, index_: i32) -> Rectangle {
unsafe {
let mut pos = Rectangle::uninitialized();
ffi::pango_layout_index_to_pos(self.to_glib_none().0, index_, pos.to_glib_none_mut().0);
pos
}
}
/// Queries whether the layout had to ellipsize any paragraphs.
///
/// This returns [`true`] if the ellipsization mode for @self
/// is not [`EllipsizeMode::None`][crate::EllipsizeMode::None], a positive width is set on @self,
/// and there are paragraphs exceeding that width that have to be
/// ellipsized.
///
/// # Returns
///
/// [`true`] if any paragraphs had to be ellipsized,
/// [`false`] otherwise
#[doc(alias = "pango_layout_is_ellipsized")]
pub fn is_ellipsized(&self) -> bool {
unsafe { from_glib(ffi::pango_layout_is_ellipsized(self.to_glib_none().0)) }
}
/// Queries whether the layout had to wrap any paragraphs.
///
/// This returns [`true`] if a positive width is set on @self,
/// ellipsization mode of @self is set to [`EllipsizeMode::None`][crate::EllipsizeMode::None],
/// and there are paragraphs exceeding the layout width that have
/// to be wrapped.
///
/// # Returns
///
/// [`true`] if any paragraphs had to be wrapped, [`false`]
/// otherwise
#[doc(alias = "pango_layout_is_wrapped")]
pub fn is_wrapped(&self) -> bool {
unsafe { from_glib(ffi::pango_layout_is_wrapped(self.to_glib_none().0)) }
}
/// Computes a new cursor position from an old position and a direction.
///
/// If @direction is positive, then the new position will cause the strong
/// or weak cursor to be displayed one position to right of where it was
/// with the old cursor position. If @direction is negative, it will be
/// moved to the left.
///
/// In the presence of bidirectional text, the correspondence between
/// logical and visual order will depend on the direction of the current
/// run, and there may be jumps when the cursor is moved off of the end
/// of a run.
///
/// Motion here is in cursor positions, not in characters, so a single
/// call to this function may move the cursor over multiple characters
/// when multiple characters combine to form a single grapheme.
/// ## `strong`
/// whether the moving cursor is the strong cursor or the
/// weak cursor. The strong cursor is the cursor corresponding
/// to text insertion in the base direction for the layout.
/// ## `old_index`
/// the byte index of the current cursor position
/// ## `old_trailing`
/// if 0, the cursor was at the leading edge of the
/// grapheme indicated by @old_index, if > 0, the cursor
/// was at the trailing edge.
/// ## `direction`
/// direction to move cursor. A negative
/// value indicates motion to the left
///
/// # Returns
///
///
/// ## `new_index`
/// location to store the new cursor byte index.
/// A value of -1 indicates that the cursor has been moved off the
/// beginning of the layout. A value of `G_MAXINT` indicates that
/// the cursor has been moved off the end of the layout.
///
/// ## `new_trailing`
/// number of characters to move forward from
/// the location returned for @new_index to get the position where
/// the cursor should be displayed. This allows distinguishing the
/// position at the beginning of one line from the position at the
/// end of the preceding line. @new_index is always on the line where
/// the cursor should be displayed.
#[doc(alias = "pango_layout_move_cursor_visually")]
pub fn move_cursor_visually(
&self,
strong: bool,
old_index: i32,
old_trailing: i32,
direction: i32,
) -> (i32, i32) {
unsafe {
let mut new_index = mem::MaybeUninit::uninit();
let mut new_trailing = mem::MaybeUninit::uninit();
ffi::pango_layout_move_cursor_visually(
self.to_glib_none().0,
strong.into_glib(),
old_index,
old_trailing,
direction,
new_index.as_mut_ptr(),
new_trailing.as_mut_ptr(),
);
(new_index.assume_init(), new_trailing.assume_init())
}
}
/// Serializes the @self for later deserialization via `Pango::Layout::deserialize()`.
///
/// There are no guarantees about the format of the output across different
/// versions of Pango and `Pango::Layout::deserialize()` will reject data
/// that it cannot parse.
///
/// The intended use of this function is testing, benchmarking and debugging.
/// The format is not meant as a permanent storage format.
/// ## `flags`
/// [`LayoutSerializeFlags`][crate::LayoutSerializeFlags]
///
/// # Returns
///
/// a `GBytes` containing the serialized form of @self
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
#[doc(alias = "pango_layout_serialize")]
pub fn serialize(&self, flags: LayoutSerializeFlags) -> glib::Bytes {
unsafe {
from_glib_full(ffi::pango_layout_serialize(
self.to_glib_none().0,
flags.into_glib(),
))
}
}
/// Sets the alignment for the layout: how partial lines are
/// positioned within the horizontal space available.
///
/// The default alignment is [`Alignment::Left`][crate::Alignment::Left].
/// ## `alignment`
/// the alignment
#[doc(alias = "pango_layout_set_alignment")]
pub fn set_alignment(&self, alignment: Alignment) {
unsafe {
ffi::pango_layout_set_alignment(self.to_glib_none().0, alignment.into_glib());
}
}
/// Sets the text attributes for a layout object.
///
/// References @attrs, so the caller can unref its reference.
/// ## `attrs`
/// a [`AttrList`][crate::AttrList]
#[doc(alias = "pango_layout_set_attributes")]
pub fn set_attributes(&self, attrs: Option<&AttrList>) {
unsafe {
ffi::pango_layout_set_attributes(self.to_glib_none().0, attrs.to_glib_none().0);
}
}
/// Sets whether to calculate the base direction
/// for the layout according to its contents.
///
/// When this flag is on (the default), then paragraphs in @self that
/// begin with strong right-to-left characters (Arabic and Hebrew principally),
/// will have right-to-left layout, paragraphs with letters from other scripts
/// will have left-to-right layout. Paragraphs with only neutral characters
/// get their direction from the surrounding paragraphs.
///
/// When [`false`], the choice between left-to-right and right-to-left
/// layout is done according to the base direction of the layout's
/// [`Context`][crate::Context]. (See [`Context::set_base_dir()`][crate::Context::set_base_dir()]).
///
/// When the auto-computed direction of a paragraph differs from the
/// base direction of the context, the interpretation of
/// [`Alignment::Left`][crate::Alignment::Left] and [`Alignment::Right`][crate::Alignment::Right] are swapped.
/// ## `auto_dir`
/// if [`true`], compute the bidirectional base direction
/// from the layout's contents
#[doc(alias = "pango_layout_set_auto_dir")]
pub fn set_auto_dir(&self, auto_dir: bool) {
unsafe {
ffi::pango_layout_set_auto_dir(self.to_glib_none().0, auto_dir.into_glib());
}
}
/// Sets the type of ellipsization being performed for @self.
///
/// Depending on the ellipsization mode @ellipsize text is
/// removed from the start, middle, or end of text so they
/// fit within the width and height of layout set with
/// [`set_width()`][Self::set_width()] and [`set_height()`][Self::set_height()].
///
/// If the layout contains characters such as newlines that
/// force it to be layed out in multiple paragraphs, then whether
/// each paragraph is ellipsized separately or the entire layout
/// is ellipsized as a whole depends on the set height of the layout.
///
/// The default value is [`EllipsizeMode::None`][crate::EllipsizeMode::None].
///
/// See [`set_height()`][Self::set_height()] for details.
/// ## `ellipsize`
/// the new ellipsization mode for @self
#[doc(alias = "pango_layout_set_ellipsize")]
pub fn set_ellipsize(&self, ellipsize: EllipsizeMode) {
unsafe {
ffi::pango_layout_set_ellipsize(self.to_glib_none().0, ellipsize.into_glib());
}
}
/// Sets the default font description for the layout.
///
/// If no font description is set on the layout, the
/// font description from the layout's context is used.
/// ## `desc`
/// the new [`FontDescription`][crate::FontDescription]
/// to unset the current font description
#[doc(alias = "pango_layout_set_font_description")]
pub fn set_font_description(&self, desc: Option<&FontDescription>) {
unsafe {
ffi::pango_layout_set_font_description(self.to_glib_none().0, desc.to_glib_none().0);
}
}
/// Sets the height to which the [`Layout`][crate::Layout] should be ellipsized at.
///
/// There are two different behaviors, based on whether @height is positive
/// or negative.
///
/// If @height is positive, it will be the maximum height of the layout. Only
/// lines would be shown that would fit, and if there is any text omitted,
/// an ellipsis added. At least one line is included in each paragraph regardless
/// of how small the height value is. A value of zero will render exactly one
/// line for the entire layout.
///
/// If @height is negative, it will be the (negative of) maximum number of lines
/// per paragraph. That is, the total number of lines shown may well be more than
/// this value if the layout contains multiple paragraphs of text.
/// The default value of -1 means that the first line of each paragraph is ellipsized.
/// This behavior may be changed in the future to act per layout instead of per
/// paragraph. File a bug against pango at
/// [https://gitlab.gnome.org/gnome/pango](https://gitlab.gnome.org/gnome/pango)
/// if your code relies on this behavior.
///
/// Height setting only has effect if a positive width is set on
/// @self and ellipsization mode of @self is not [`EllipsizeMode::None`][crate::EllipsizeMode::None].
/// The behavior is undefined if a height other than -1 is set and
/// ellipsization mode is set to [`EllipsizeMode::None`][crate::EllipsizeMode::None], and may change in the
/// future.
/// ## `height`
/// the desired height of the layout in Pango units if positive,
/// or desired number of lines if negative.
#[doc(alias = "pango_layout_set_height")]
pub fn set_height(&self, height: i32) {
unsafe {
ffi::pango_layout_set_height(self.to_glib_none().0, height);
}
}
/// Sets the width in Pango units to indent each paragraph.
///
/// A negative value of @indent will produce a hanging indentation.
/// That is, the first line will have the full width, and subsequent
/// lines will be indented by the absolute value of @indent.
///
/// The indent setting is ignored if layout alignment is set to
/// [`Alignment::Center`][crate::Alignment::Center].
///
/// The default value is 0.
/// ## `indent`
/// the amount by which to indent
#[doc(alias = "pango_layout_set_indent")]
pub fn set_indent(&self, indent: i32) {
unsafe {
ffi::pango_layout_set_indent(self.to_glib_none().0, indent);
}
}
/// Sets whether each complete line should be stretched to fill the
/// entire width of the layout.
///
/// Stretching is typically done by adding whitespace, but for some scripts
/// (such as Arabic), the justification may be done in more complex ways,
/// like extending the characters.
///
/// Note that this setting is not implemented and so is ignored in
/// Pango older than 1.18.
///
/// Note that tabs and justification conflict with each other:
/// Justification will move content away from its tab-aligned
/// positions.
///
/// The default value is [`false`].
///
/// Also see [`set_justify_last_line()`][Self::set_justify_last_line()].
/// ## `justify`
/// whether the lines in the layout should be justified
#[doc(alias = "pango_layout_set_justify")]
pub fn set_justify(&self, justify: bool) {
unsafe {
ffi::pango_layout_set_justify(self.to_glib_none().0, justify.into_glib());
}
}
/// Sets whether the last line should be stretched to fill the
/// entire width of the layout.
///
/// This only has an effect if [`set_justify()`][Self::set_justify()] has
/// been called as well.
///
/// The default value is [`false`].
/// ## `justify`
/// whether the last line in the layout should be justified
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
#[doc(alias = "pango_layout_set_justify_last_line")]
pub fn set_justify_last_line(&self, justify: bool) {
unsafe {
ffi::pango_layout_set_justify_last_line(self.to_glib_none().0, justify.into_glib());
}
}
/// Sets a factor for line spacing.
///
/// Typical values are: 0, 1, 1.5, 2. The default values is 0.
///
/// If @factor is non-zero, lines are placed so that
///
/// baseline2 = baseline1 + factor * height2
///
/// where height2 is the line height of the second line
/// (as determined by the font(s)). In this case, the spacing
/// set with [`set_spacing()`][Self::set_spacing()] is ignored.
///
/// If @factor is zero (the default), spacing is applied as before.
///
/// Note: for semantics that are closer to the CSS line-height
/// property, see `attr_line_height_new()`.
/// ## `factor`
/// the new line spacing factor
#[cfg(any(feature = "v1_44", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_44")))]
#[doc(alias = "pango_layout_set_line_spacing")]
pub fn set_line_spacing(&self, factor: f32) {
unsafe {
ffi::pango_layout_set_line_spacing(self.to_glib_none().0, factor);
}
}
/// Sets the layout text and attribute list from marked-up text.
///
/// See [Pango Markup](pango_markup.html)).
///
/// Replaces the current text and attribute list.
///
/// This is the same as [`set_markup_with_accel()`][Self::set_markup_with_accel()],
/// but the markup text isn't scanned for accelerators.
/// ## `markup`
/// marked-up text
/// ## `length`
/// length of marked-up text in bytes, or -1 if @markup is
/// `NUL`-terminated
#[doc(alias = "pango_layout_set_markup")]
pub fn set_markup(&self, markup: &str) {
let length = markup.len() as _;
unsafe {
ffi::pango_layout_set_markup(self.to_glib_none().0, markup.to_glib_none().0, length);
}
}
/// Sets the layout text and attribute list from marked-up text.
///
/// See [Pango Markup](pango_markup.html)).
///
/// Replaces the current text and attribute list.
///
/// If @accel_marker is nonzero, the given character will mark the
/// character following it as an accelerator. For example, @accel_marker
/// might be an ampersand or underscore. All characters marked
/// as an accelerator will receive a [`Underline::Low`][crate::Underline::Low] attribute,
/// and the first character so marked will be returned in @accel_char.
/// Two @accel_marker characters following each other produce a single
/// literal @accel_marker character.
/// ## `markup`
/// marked-up text (see [Pango Markup](pango_markup.html))
/// ## `length`
/// length of marked-up text in bytes, or -1 if @markup is
/// `NUL`-terminated
/// ## `accel_marker`
/// marker for accelerators in the text
///
/// # Returns
///
///
/// ## `accel_char`
/// return location
/// for first located accelerator
#[doc(alias = "pango_layout_set_markup_with_accel")]
pub fn set_markup_with_accel(&self, markup: &str, accel_marker: char) -> char {
let length = markup.len() as _;
unsafe {
let mut accel_char = mem::MaybeUninit::uninit();
ffi::pango_layout_set_markup_with_accel(
self.to_glib_none().0,
markup.to_glib_none().0,
length,
accel_marker.into_glib(),
accel_char.as_mut_ptr(),
);
std::convert::TryFrom::try_from(accel_char.assume_init())
.expect("conversion from an invalid Unicode value attempted")
}
}
/// Sets the single paragraph mode of @self.
///
/// If @setting is [`true`], do not treat newlines and similar characters
/// as paragraph separators; instead, keep all text in a single paragraph,
/// and display a glyph for paragraph separator characters. Used when
/// you want to allow editing of newlines on a single text line.
///
/// The default value is [`false`].
/// ## `setting`
/// new setting
#[doc(alias = "pango_layout_set_single_paragraph_mode")]
pub fn set_single_paragraph_mode(&self, setting: bool) {
unsafe {
ffi::pango_layout_set_single_paragraph_mode(self.to_glib_none().0, setting.into_glib());
}
}
/// Sets the amount of spacing in Pango units between
/// the lines of the layout.
///
/// When placing lines with spacing, Pango arranges things so that
///
/// line2.top = line1.bottom + spacing
///
/// The default value is 0.
///
/// Note: Since 1.44, Pango is using the line height (as determined
/// by the font) for placing lines when the line spacing factor is set
/// to a non-zero value with [`set_line_spacing()`][Self::set_line_spacing()].
/// In that case, the @spacing set with this function is ignored.
///
/// Note: for semantics that are closer to the CSS line-height
/// property, see `attr_line_height_new()`.
/// ## `spacing`
/// the amount of spacing
#[doc(alias = "pango_layout_set_spacing")]
pub fn set_spacing(&self, spacing: i32) {
unsafe {
ffi::pango_layout_set_spacing(self.to_glib_none().0, spacing);
}
}
/// Sets the tabs to use for @self, overriding the default tabs.
///
/// [`Layout`][crate::Layout] will place content at the next tab position
/// whenever it meets a Tab character (U+0009).
///
/// By default, tabs are every 8 spaces. If @tabs is [`None`], the
/// default tabs are reinstated. @tabs is copied into the layout;
/// you must free your copy of @tabs yourself.
///
/// Note that tabs and justification conflict with each other:
/// Justification will move content away from its tab-aligned
/// positions. The same is true for alignments other than
/// [`Alignment::Left`][crate::Alignment::Left].
/// ## `tabs`
/// a [`TabArray`][crate::TabArray]
#[doc(alias = "pango_layout_set_tabs")]
pub fn set_tabs(&self, tabs: Option<&TabArray>) {
unsafe {
ffi::pango_layout_set_tabs(self.to_glib_none().0, mut_override(tabs.to_glib_none().0));
}
}
/// Sets the text of the layout.
///
/// This function validates @text and renders invalid UTF-8
/// with a placeholder glyph.
///
/// Note that if you have used [`set_markup()`][Self::set_markup()] or
/// [`set_markup_with_accel()`][Self::set_markup_with_accel()] on @self before, you
/// may want to call [`set_attributes()`][Self::set_attributes()] to clear the
/// attributes set on the layout from the markup as this function does
/// not clear attributes.
/// ## `text`
/// the text
/// ## `length`
/// maximum length of @text, in bytes. -1 indicates that
/// the string is nul-terminated and the length should be calculated.
/// The text will also be truncated on encountering a nul-termination
/// even when @length is positive.
#[doc(alias = "pango_layout_set_text")]
pub fn set_text(&self, text: &str) {
let length = text.len() as _;
unsafe {
ffi::pango_layout_set_text(self.to_glib_none().0, text.to_glib_none().0, length);
}
}
/// Sets the width to which the lines of the [`Layout`][crate::Layout] should wrap or
/// ellipsized.
///
/// The default value is -1: no width set.
/// ## `width`
/// the desired width in Pango units, or -1 to indicate that no
/// wrapping or ellipsization should be performed.
#[doc(alias = "pango_layout_set_width")]
pub fn set_width(&self, width: i32) {
unsafe {
ffi::pango_layout_set_width(self.to_glib_none().0, width);
}
}
/// Sets the wrap mode.
///
/// The wrap mode only has effect if a width is set on the layout
/// with [`set_width()`][Self::set_width()]. To turn off wrapping,
/// set the width to -1.
///
/// The default value is [`WrapMode::Word`][crate::WrapMode::Word].
/// ## `wrap`
/// the wrap mode
#[doc(alias = "pango_layout_set_wrap")]
pub fn set_wrap(&self, wrap: WrapMode) {
unsafe {
ffi::pango_layout_set_wrap(self.to_glib_none().0, wrap.into_glib());
}
}
/// A convenience method to serialize a layout to a file.
///
/// It is equivalent to calling [`serialize()`][Self::serialize()]
/// followed by `file_set_contents()`.
///
/// See those two functions for details on the arguments.
///
/// It is mostly intended for use inside a debugger to quickly dump
/// a layout to a file for later inspection.
/// ## `flags`
/// [`LayoutSerializeFlags`][crate::LayoutSerializeFlags]
/// ## `filename`
/// the file to save it to
///
/// # Returns
///
/// [`true`] if saving was successful
#[cfg(any(feature = "v1_50", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_50")))]
#[doc(alias = "pango_layout_write_to_file")]
pub fn write_to_file(
&self,
flags: LayoutSerializeFlags,
filename: impl AsRef<std::path::Path>,
) -> Result<(), glib::Error> {
unsafe {
let mut error = ptr::null_mut();
let is_ok = ffi::pango_layout_write_to_file(
self.to_glib_none().0,
flags.into_glib(),
filename.as_ref().to_glib_none().0,
&mut error,
);
debug_assert_eq!(is_ok == glib::ffi::GFALSE, !error.is_null());
if error.is_null() {
Ok(())
} else {
Err(from_glib_full(error))
}
}
}
/// Converts from X and Y position within a layout to the byte index to the
/// character at that logical position.
///
/// If the Y position is not inside the layout, the closest position is
/// chosen (the position will be clamped inside the layout). If the X position
/// is not within the layout, then the start or the end of the line is
/// chosen as described for [`LayoutLine::x_to_index()`][crate::LayoutLine::x_to_index()]. If either
/// the X or Y positions were not inside the layout, then the function returns
/// [`false`]; on an exact hit, it returns [`true`].
/// ## `x`
/// the X offset (in Pango units) from the left edge of the layout
/// ## `y`
/// the Y offset (in Pango units) from the top edge of the layout
///
/// # Returns
///
/// [`true`] if the coordinates were inside text, [`false`] otherwise
///
/// ## `index_`
/// location to store calculated byte index
///
/// ## `trailing`
/// location to store a integer indicating where
/// in the grapheme the user clicked. It will either be zero, or the
/// number of characters in the grapheme. 0 represents the leading edge
/// of the grapheme.
#[doc(alias = "pango_layout_xy_to_index")]
pub fn xy_to_index(&self, x: i32, y: i32) -> (bool, i32, i32) {
unsafe {
let mut index_ = mem::MaybeUninit::uninit();
let mut trailing = mem::MaybeUninit::uninit();
let ret = from_glib(ffi::pango_layout_xy_to_index(
self.to_glib_none().0,
x,
y,
index_.as_mut_ptr(),
trailing.as_mut_ptr(),
));
(ret, index_.assume_init(), trailing.assume_init())
}
}
}
impl fmt::Display for Layout {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("Layout")
}
}