Struct

Pango.LayoutLine

Description [src]

struct PangoLayoutLine {
  PangoLayout* layout;
  gint start_index;
  gint length;
  GSList* runs;
  guint is_paragraph_start;
  guint resolved_dir;
}

A PangoLayoutLine represents one of the lines resulting from laying out a paragraph via PangoLayout.

PangoLayoutLine structures are obtained by calling pango_layout_get_line() and are only valid until the text, attributes, or settings of the parent PangoLayout are modified.

Structure members
layout

the layout this line belongs to, might be NULL

start_index

start of line as byte index into layout->text

length

length of line in bytes

runs

list of runs in the line, from left to right

is_paragraph_start

TRUE if this is the first line of the paragraph

resolved_dir

Resolved PangoDirection of line

Instance methods

pango_layout_line_get_extents

Computes the logical and ink extents of a layout line. See pango_font_get_glyph_extents() for details about the interpretation of the rectangles.

pango_layout_line_get_height

Computes the height of the line, i.e. the distance between this and the previous lines baseline.

Available since: 1.44

pango_layout_line_get_pixel_extents

Computes the logical and ink extents of layout_line in device units.

pango_layout_line_get_x_ranges

Gets a list of visual ranges corresponding to a given logical range. This list is not necessarily minimal - there may be consecutive ranges which are adjacent. The ranges will be sorted from left to right. The ranges are with respect to the left edge of the entire layout, not with respect to the line.

pango_layout_line_index_to_x

Converts an index within a line to a X position.

pango_layout_line_ref

Increase the reference count of a PangoLayoutLine by one.

Available since: 1.10

pango_layout_line_unref

Decrease the reference count of a PangoLayoutLine by one. If the result is zero, the line and all associated memory will be freed.

pango_layout_line_x_to_index

Converts from x offset to the byte index of the corresponding character within the text of the layout. If x_pos is outside the line, index_ and trailing will point to the very first or very last position in the line. This determination is based on the resolved direction of the paragraph; for example, if the resolved direction is right-to-left, then an X position to the right of the line (after it) results in 0 being stored in index_ and trailing. An X position to the left of the line results in index_ pointing to the (logical) last grapheme in the line and trailing being set to the number of characters in that grapheme. The reverse is true for a left-to-right line.