libgtkd-3-dev 3.7.5-2build1 / usr / include / d / gtkd-3 / pango / PgLayout.d

/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage


module pango.PgLayout;

private import glib.ConstructionException;
private import glib.ListSG;
private import glib.Str;
private import gobject.ObjectG;
public  import gtkc.pangotypes;
private import pango.PgAttributeList;
private import pango.PgContext;
private import pango.PgFontDescription;
private import pango.PgLayoutIter;
private import pango.PgLayoutLine;
private import pango.PgTabArray;
private import pango.c.functions;
public  import pango.c.types;


/**
 * The #PangoLayout structure represents an entire paragraph
 * of text. It is initialized with a #PangoContext, 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 also a number of parameters to adjust the formatting
 * of a #PangoLayout, which are illustrated in <xref linkend="parameters"/>.
 * It is possible, as well, to ignore the 2-D setup, and simply
 * treat the results of a #PangoLayout as a list of lines.
 * 
 * <figure id="parameters">
 * <title>Adjustable parameters for a PangoLayout</title>
 * <graphic fileref="layout.gif" format="GIF"></graphic>
 * </figure>
 * 
 * The #PangoLayout structure is opaque, and has no user-visible
 * fields.
 */
public class PgLayout : ObjectG
{
	/** the main Gtk struct */
	protected PangoLayout* pangoLayout;

	/** Get the main Gtk struct */
	public PangoLayout* getPgLayoutStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return pangoLayout;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)pangoLayout;
	}

	protected override void setStruct(GObject* obj)
	{
		pangoLayout = cast(PangoLayout*)obj;
		super.setStruct(obj);
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (PangoLayout* pangoLayout, bool ownedRef = false)
	{
		this.pangoLayout = pangoLayout;
		super(cast(GObject*)pangoLayout, ownedRef);
	}


	/** */
	public static GType getType()
	{
		return pango_layout_get_type();
	}

	/**
	 * Create a new #PangoLayout object with attributes initialized to
	 * default values for a particular #PangoContext.
	 *
	 * Params:
	 *     context = a #PangoContext
	 *
	 * Returns: the newly allocated #PangoLayout, with a reference
	 *     count of one, which should be freed with
	 *     g_object_unref().
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(PgContext context)
	{
		auto p = pango_layout_new((context is null) ? null : context.getPgContextStruct());

		if(p is null)
		{
			throw new ConstructionException("null returned by new");
		}

		this(cast(PangoLayout*) p, true);
	}

	/**
	 * Forces recomputation of any state in the #PangoLayout 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.
	 */
	public void contextChanged()
	{
		pango_layout_context_changed(pangoLayout);
	}

	/**
	 * Does a deep copy-by-value of the @src layout. The attribute list,
	 * tab array, and text from the original layout are all copied by
	 * value.
	 *
	 * Returns: the newly allocated #PangoLayout,
	 *     with a reference count of one, which should be freed
	 *     with g_object_unref().
	 */
	public PgLayout copy()
	{
		auto p = pango_layout_copy(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgLayout)(cast(PangoLayout*) p, true);
	}

	/**
	 * Gets the alignment for the layout: how partial lines are
	 * positioned within the horizontal space available.
	 *
	 * Returns: the alignment.
	 */
	public PangoAlignment getAlignment()
	{
		return pango_layout_get_alignment(pangoLayout);
	}

	/**
	 * Gets the attribute list for the layout, if any.
	 *
	 * Returns: a #PangoAttrList.
	 */
	public PgAttributeList getAttributes()
	{
		auto p = pango_layout_get_attributes(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgAttributeList)(cast(PangoAttrList*) p);
	}

	/**
	 * Gets whether to calculate the bidirectional base direction
	 * for the layout according to the contents of the layout.
	 * See pango_layout_set_auto_dir().
	 *
	 * Returns: %TRUE if the bidirectional base direction
	 *     is computed from the layout's contents, %FALSE otherwise.
	 *
	 * Since: 1.4
	 */
	public bool getAutoDir()
	{
		return pango_layout_get_auto_dir(pangoLayout) != 0;
	}

	/**
	 * Gets the Y position of baseline of the first line in @layout.
	 *
	 * Returns: baseline of first line, from top of @layout.
	 *
	 * Since: 1.22
	 */
	public int getBaseline()
	{
		return pango_layout_get_baseline(pangoLayout);
	}

	/**
	 * Returns the number of Unicode characters in the
	 * the text of @layout.
	 *
	 * Returns: the number of Unicode characters
	 *     in the text of @layout
	 *
	 * Since: 1.30
	 */
	public int getCharacterCount()
	{
		return pango_layout_get_character_count(pangoLayout);
	}

	/**
	 * Retrieves the #PangoContext used for this layout.
	 *
	 * Returns: the #PangoContext for the layout.
	 *     This does not have an additional refcount added, so if you want to
	 *     keep a copy of this around, you must reference it yourself.
	 */
	public PgContext getContext()
	{
		auto p = pango_layout_get_context(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgContext)(cast(PangoContext*) p);
	}

	/**
	 * 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. 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.
	 *
	 * Params:
	 *     index = the byte index of the cursor
	 *     strongPos = location to store the strong cursor position
	 *         (may be %NULL)
	 *     weakPos = location to store the weak cursor position (may be %NULL)
	 */
	public void getCursorPos(int index, out PangoRectangle strongPos, out PangoRectangle weakPos)
	{
		pango_layout_get_cursor_pos(pangoLayout, index, &strongPos, &weakPos);
	}

	/**
	 * Gets the type of ellipsization being performed for @layout.
	 * See pango_layout_set_ellipsize()
	 *
	 * Returns: the current ellipsization mode for @layout.
	 *
	 *     Use pango_layout_is_ellipsized() to query whether any paragraphs
	 *     were actually ellipsized.
	 *
	 * Since: 1.6
	 */
	public PangoEllipsizeMode getEllipsize()
	{
		return pango_layout_get_ellipsize(pangoLayout);
	}

	/**
	 * Computes the logical and ink extents of @layout. 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.
	 *
	 * Params:
	 *     inkRect = rectangle used to store the extents of the
	 *         layout as drawn or %NULL to indicate that the result is
	 *         not needed.
	 *     logicalRect = rectangle used to store the logical
	 *         extents of the layout or %NULL to indicate that the
	 *         result is not needed.
	 */
	public void getExtents(out PangoRectangle inkRect, out PangoRectangle logicalRect)
	{
		pango_layout_get_extents(pangoLayout, &inkRect, &logicalRect);
	}

	/**
	 * Gets the font description for the layout, if any.
	 *
	 * Returns: a pointer to the layout's font
	 *     description, or %NULL if the font description from the layout's
	 *     context is inherited. This value is owned by the layout and must
	 *     not be modified or freed.
	 *
	 * Since: 1.8
	 */
	public PgFontDescription getFontDescription()
	{
		auto p = pango_layout_get_font_description(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgFontDescription)(cast(PangoFontDescription*) p);
	}

	/**
	 * Gets the height of layout used for ellipsization.  See
	 * pango_layout_set_height() for details.
	 *
	 * Returns: the height, in Pango units if positive, or
	 *     number of lines if negative.
	 *
	 * Since: 1.20
	 */
	public int getHeight()
	{
		return pango_layout_get_height(pangoLayout);
	}

	/**
	 * Gets the paragraph indent width in Pango units. A negative value
	 * indicates a hanging indentation.
	 *
	 * Returns: the indent in Pango units.
	 */
	public int getIndent()
	{
		return pango_layout_get_indent(pangoLayout);
	}

	/**
	 * Returns an iterator to iterate over the visual extents of the layout.
	 *
	 * Returns: the new #PangoLayoutIter that should be freed using
	 *     pango_layout_iter_free().
	 */
	public PgLayoutIter getIter()
	{
		auto p = pango_layout_get_iter(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgLayoutIter)(cast(PangoLayoutIter*) p, true);
	}

	/**
	 * Gets whether each complete line should be stretched to fill the entire
	 * width of the layout.
	 *
	 * Returns: the justify.
	 */
	public bool getJustify()
	{
		return pango_layout_get_justify(pangoLayout) != 0;
	}

	/**
	 * Retrieves a particular line from a #PangoLayout.
	 *
	 * Use the faster pango_layout_get_line_readonly() if you do not plan
	 * to modify the contents of the line (glyphs, glyph widths, etc.).
	 *
	 * Params:
	 *     line = the index of a line, which must be between 0 and
	 *         <literal>pango_layout_get_line_count(layout) - 1</literal>, inclusive.
	 *
	 * Returns: the requested
	 *     #PangoLayoutLine, or %NULL 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
	 *     #PangoLayout.
	 */
	public PgLayoutLine getLine(int line)
	{
		auto p = pango_layout_get_line(pangoLayout, line);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgLayoutLine)(cast(PangoLayoutLine*) p);
	}

	/**
	 * Retrieves the count of lines for the @layout.
	 *
	 * Returns: the line count.
	 */
	public int getLineCount()
	{
		return pango_layout_get_line_count(pangoLayout);
	}

	/**
	 * Retrieves a particular line from a #PangoLayout.
	 *
	 * This is a faster alternative to pango_layout_get_line(),
	 * but the user is not expected
	 * to modify the contents of the line (glyphs, glyph widths, etc.).
	 *
	 * Params:
	 *     line = the index of a line, which must be between 0 and
	 *         <literal>pango_layout_get_line_count(layout) - 1</literal>, inclusive.
	 *
	 * Returns: the requested
	 *     #PangoLayoutLine, or %NULL 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
	 *     #PangoLayout.  No changes should be made to the line.
	 *
	 * Since: 1.16
	 */
	public PgLayoutLine getLineReadonly(int line)
	{
		auto p = pango_layout_get_line_readonly(pangoLayout, line);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgLayoutLine)(cast(PangoLayoutLine*) p);
	}

	/**
	 * Returns the lines of the @layout as a list.
	 *
	 * Use the faster pango_layout_get_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 #PangoLayout
	 *     and must be used with care. It will become invalid on any change to the layout's
	 *     text or properties.
	 */
	public ListSG getLines()
	{
		auto p = pango_layout_get_lines(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return new ListSG(cast(GSList*) p);
	}

	/**
	 * Returns the lines of the @layout as a list.
	 *
	 * This is a faster alternative to pango_layout_get_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 #PangoLayout 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.
	 *
	 * Since: 1.16
	 */
	public ListSG getLinesReadonly()
	{
		auto p = pango_layout_get_lines_readonly(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return new ListSG(cast(GSList*) p);
	}

	/**
	 * Retrieves an array of logical attributes for each character in
	 * the @layout.
	 *
	 * Params:
	 *     attrs = location to store a pointer to an array of logical attributes
	 *         This value must be freed with g_free().
	 */
	public void getLogAttrs(out PangoLogAttr[] attrs)
	{
		PangoLogAttr* outattrs = null;
		int nAttrs;

		pango_layout_get_log_attrs(pangoLayout, &outattrs, &nAttrs);

		attrs = outattrs[0 .. nAttrs];
	}

	/**
	 * Retrieves an array of logical attributes for each character in
	 * the @layout.
	 *
	 * This is a faster alternative to pango_layout_get_log_attrs().
	 * The returned array is part of @layout and must not be modified.
	 * Modifying the layout will invalidate the returned array.
	 *
	 * The number of attributes returned in @n_attrs will be one more
	 * than the total number of characters in the layout, since there
	 * need to be attributes corresponding to both the position before
	 * the first character and the position after the last character.
	 *
	 * Returns: an array of logical attributes
	 *
	 * Since: 1.30
	 */
	public PangoLogAttr[] getLogAttrsReadonly()
	{
		int nAttrs;

		auto p = pango_layout_get_log_attrs_readonly(pangoLayout, &nAttrs);

		return p[0 .. nAttrs];
	}

	/**
	 * Computes the logical and ink extents of @layout in device units.
	 * This function just calls pango_layout_get_extents() followed by
	 * two pango_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 pango_extents_to_pixels()).
	 *
	 * Params:
	 *     inkRect = rectangle used to store the extents of the
	 *         layout as drawn or %NULL to indicate that the result is
	 *         not needed.
	 *     logicalRect = rectangle used to store the logical
	 *         extents of the layout or %NULL to indicate that the
	 *         result is not needed.
	 */
	public void getPixelExtents(out PangoRectangle inkRect, out PangoRectangle logicalRect)
	{
		pango_layout_get_pixel_extents(pangoLayout, &inkRect, &logicalRect);
	}

	/**
	 * Determines the logical width and height of a #PangoLayout
	 * in device units. (pango_layout_get_size() returns the width
	 * and height scaled by %PANGO_SCALE.) This
	 * is simply a convenience function around
	 * pango_layout_get_pixel_extents().
	 *
	 * Params:
	 *     width = location to store the logical width, or %NULL
	 *     height = location to store the logical height, or %NULL
	 */
	public void getPixelSize(out int width, out int height)
	{
		pango_layout_get_pixel_size(pangoLayout, &width, &height);
	}

	/**
	 * Returns the current serial number of @layout.  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 #PangoContext 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 #PangoLayout, and
	 * is useful for example to decide whether a layout needs redrawing.
	 * To force the serial to be increased, use pango_layout_context_changed().
	 *
	 * Returns: The current serial number of @layout.
	 *
	 * Since: 1.32.4
	 */
	public uint getSerial()
	{
		return pango_layout_get_serial(pangoLayout);
	}

	/**
	 * Obtains the value set by pango_layout_set_single_paragraph_mode().
	 *
	 * Returns: %TRUE if the layout does not break paragraphs at
	 *     paragraph separator characters, %FALSE otherwise.
	 */
	public bool getSingleParagraphMode()
	{
		return pango_layout_get_single_paragraph_mode(pangoLayout) != 0;
	}

	/**
	 * Determines the logical width and height of a #PangoLayout
	 * in Pango units (device units scaled by %PANGO_SCALE). This
	 * is simply a convenience function around pango_layout_get_extents().
	 *
	 * Params:
	 *     width = location to store the logical width, or %NULL
	 *     height = location to store the logical height, or %NULL
	 */
	public void getSize(out int width, out int height)
	{
		pango_layout_get_size(pangoLayout, &width, &height);
	}

	/**
	 * Gets the amount of spacing between the lines of the layout.
	 *
	 * Returns: the spacing in Pango units.
	 */
	public int getSpacing()
	{
		return pango_layout_get_spacing(pangoLayout);
	}

	/**
	 * Gets the current #PangoTabArray used by this layout. If no
	 * #PangoTabArray has been set, then the default tabs are in use
	 * and %NULL is returned. Default tabs are every 8 spaces.
	 * The return value should be freed with pango_tab_array_free().
	 *
	 * Returns: a copy of the tabs for this layout, or
	 *     %NULL.
	 */
	public PgTabArray getTabs()
	{
		auto p = pango_layout_get_tabs(pangoLayout);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgTabArray)(cast(PangoTabArray*) p, true);
	}

	/**
	 * Gets the text in the layout. The returned text should not
	 * be freed or modified.
	 *
	 * Returns: the text in the @layout.
	 */
	public string getText()
	{
		return Str.toString(pango_layout_get_text(pangoLayout));
	}

	/**
	 * Counts the number unknown glyphs in @layout.  That is, zero if
	 * glyphs for all characters in the layout text were found, or more
	 * than zero otherwise.
	 *
	 * 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 %PANGO_ATTR_FALLBACK, to check if a
	 * certain font supports all the characters in the string.
	 *
	 * Returns: The number of unknown glyphs in @layout.
	 *
	 * Since: 1.16
	 */
	public int getUnknownGlyphsCount()
	{
		return pango_layout_get_unknown_glyphs_count(pangoLayout);
	}

	/**
	 * Gets the width to which the lines of the #PangoLayout should wrap.
	 *
	 * Returns: the width in Pango units, or -1 if no width set.
	 */
	public int getWidth()
	{
		return pango_layout_get_width(pangoLayout);
	}

	/**
	 * Gets the wrap mode for the layout.
	 *
	 * Use pango_layout_is_wrapped() to query whether any paragraphs
	 * were actually wrapped.
	 *
	 * Returns: active wrap mode.
	 */
	public PangoWrapMode getWrap()
	{
		return pango_layout_get_wrap(pangoLayout);
	}

	/**
	 * Converts from byte @index_ within the @layout to line and X position.
	 * (X position is measured from the left edge of the line)
	 *
	 * Params:
	 *     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.
	 *     line = location to store resulting line index. (which will
	 *         between 0 and pango_layout_get_line_count(layout) - 1), or %NULL
	 *     xPos = location to store resulting position within line
	 *         (%PANGO_SCALE units per device unit), or %NULL
	 */
	public void indexToLineX(int index, bool trailing, out int line, out int xPos)
	{
		pango_layout_index_to_line_x(pangoLayout, index, trailing, &line, &xPos);
	}

	/**
	 * Converts from an index within a #PangoLayout to the onscreen position
	 * corresponding to the grapheme at that index, which is represented
	 * as rectangle.  Note that <literal>pos->x</literal> is always the leading
	 * edge of the grapheme and <literal>pos->x + pos->width</literal> the trailing
	 * edge of the grapheme. If the directionality of the grapheme is right-to-left,
	 * then <literal>pos->width</literal> will be negative.
	 *
	 * Params:
	 *     index = byte index within @layout
	 *     pos = rectangle in which to store the position of the grapheme
	 */
	public void indexToPos(int index, out PangoRectangle pos)
	{
		pango_layout_index_to_pos(pangoLayout, index, &pos);
	}

	/**
	 * Queries whether the layout had to ellipsize any paragraphs.
	 *
	 * This returns %TRUE if the ellipsization mode for @layout
	 * is not %PANGO_ELLIPSIZE_NONE, a positive width is set on @layout,
	 * and there are paragraphs exceeding that width that have to be
	 * ellipsized.
	 *
	 * Returns: %TRUE if any paragraphs had to be ellipsized, %FALSE
	 *     otherwise.
	 *
	 * Since: 1.16
	 */
	public bool isEllipsized()
	{
		return pango_layout_is_ellipsized(pangoLayout) != 0;
	}

	/**
	 * Queries whether the layout had to wrap any paragraphs.
	 *
	 * This returns %TRUE if a positive width is set on @layout,
	 * ellipsization mode of @layout is set to %PANGO_ELLIPSIZE_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.
	 *
	 * Since: 1.16
	 */
	public bool isWrapped()
	{
		return pango_layout_is_wrapped(pangoLayout) != 0;
	}

	/**
	 * Computes a new cursor position from an old position and
	 * a count of positions to move visually. If @direction is positive,
	 * then the new strong cursor position will be one position
	 * to the right of the old cursor position. If @direction is negative,
	 * then the new strong cursor position will be one position
	 * to the left of the old cursor position.
	 *
	 * 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 pango_layout_move_cursor_visually() may move the
	 * cursor over multiple characters when multiple characters combine
	 * to form a single grapheme.
	 *
	 * Params:
	 *     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.
	 *     oldIndex = the byte index of the grapheme for the old index
	 *     oldTrailing = 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.
	 *     newIndex = 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.
	 *     newTrailing = 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.
	 */
	public void moveCursorVisually(bool strong, int oldIndex, int oldTrailing, int direction, out int newIndex, out int newTrailing)
	{
		pango_layout_move_cursor_visually(pangoLayout, strong, oldIndex, oldTrailing, direction, &newIndex, &newTrailing);
	}

	/**
	 * Sets the alignment for the layout: how partial lines are
	 * positioned within the horizontal space available.
	 *
	 * Params:
	 *     alignment = the alignment
	 */
	public void setAlignment(PangoAlignment alignment)
	{
		pango_layout_set_alignment(pangoLayout, alignment);
	}

	/**
	 * Sets the text attributes for a layout object.
	 * References @attrs, so the caller can unref its reference.
	 *
	 * Params:
	 *     attrs = a #PangoAttrList, can be %NULL
	 */
	public void setAttributes(PgAttributeList attrs)
	{
		pango_layout_set_attributes(pangoLayout, (attrs is null) ? null : attrs.getPgAttributeListStruct());
	}

	/**
	 * Sets whether to calculate the bidirectional base direction
	 * for the layout according to the contents of the layout;
	 * when this flag is on (the default), then paragraphs in
	 * @layout 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 #PangoContext. (See pango_context_set_base_dir()).
	 *
	 * When the auto-computed direction of a paragraph differs from the
	 * base direction of the context, the interpretation of
	 * %PANGO_ALIGN_LEFT and %PANGO_ALIGN_RIGHT are swapped.
	 *
	 * Params:
	 *     autoDir = if %TRUE, compute the bidirectional base direction
	 *         from the layout's contents.
	 *
	 * Since: 1.4
	 */
	public void setAutoDir(bool autoDir)
	{
		pango_layout_set_auto_dir(pangoLayout, autoDir);
	}

	/**
	 * Sets the type of ellipsization being performed for @layout.
	 * 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
	 * pango_layout_set_width() and pango_layout_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.
	 * See pango_layout_set_height() for details.
	 *
	 * Params:
	 *     ellipsize = the new ellipsization mode for @layout
	 *
	 * Since: 1.6
	 */
	public void setEllipsize(PangoEllipsizeMode ellipsize)
	{
		pango_layout_set_ellipsize(pangoLayout, ellipsize);
	}

	/**
	 * 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.
	 *
	 * Params:
	 *     desc = the new #PangoFontDescription, or %NULL to unset the
	 *         current font description
	 */
	public void setFontDescription(PgFontDescription desc)
	{
		pango_layout_set_font_description(pangoLayout, (desc is null) ? null : desc.getPgFontDescriptionStruct());
	}

	/**
	 * Sets the height to which the #PangoLayout 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 first line of each paragraph is ellipsized.
	 * This behvaior may be changed in the future to act per layout instead of per
	 * paragraph.  File a bug against pango at <ulink
	 * url="http://bugzilla.gnome.org/">http://bugzilla.gnome.org/</ulink> if your
	 * code relies on this behavior.
	 *
	 * Height setting only has effect if a positive width is set on
	 * @layout and ellipsization mode of @layout is not %PANGO_ELLIPSIZE_NONE.
	 * The behavior is undefined if a height other than -1 is set and
	 * ellipsization mode is set to %PANGO_ELLIPSIZE_NONE, and may change in the
	 * future.
	 *
	 * Params:
	 *     height = the desired height of the layout in Pango units if positive,
	 *         or desired number of lines if negative.
	 *
	 * Since: 1.20
	 */
	public void setHeight(int height)
	{
		pango_layout_set_height(pangoLayout, 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
	 * %PANGO_ALIGN_CENTER.
	 *
	 * Params:
	 *     indent = the amount by which to indent.
	 */
	public void setIndent(int indent)
	{
		pango_layout_set_indent(pangoLayout, indent);
	}

	/**
	 * Sets whether each complete line should be stretched to
	 * fill the entire width of the layout. This 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.
	 *
	 * Params:
	 *     justify = whether the lines in the layout should be justified.
	 */
	public void setJustify(bool justify)
	{
		pango_layout_set_justify(pangoLayout, justify);
	}

	/**
	 * Same as pango_layout_set_markup_with_accel(), but
	 * the markup text isn't scanned for accelerators.
	 *
	 * Params:
	 *     markup = marked-up text
	 *     length = length of marked-up text in bytes, or -1 if @markup is
	 *         null-terminated
	 */
	public void setMarkup(string markup, int length)
	{
		pango_layout_set_markup(pangoLayout, Str.toStringz(markup), length);
	}

	/**
	 * Sets the layout text and attribute list from marked-up text (see
	 * <link linkend="PangoMarkupFormat">markup format</link>). 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 %PANGO_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.
	 *
	 * Params:
	 *     markup = marked-up text
	 *         (see <link linkend="PangoMarkupFormat">markup format</link>)
	 *     length = length of marked-up text in bytes, or -1 if @markup is
	 *         null-terminated
	 *     accelMarker = marker for accelerators in the text
	 *     accelChar = return location
	 *         for first located accelerator, or %NULL
	 */
	public void setMarkupWithAccel(string markup, int length, dchar accelMarker, out dchar accelChar)
	{
		pango_layout_set_markup_with_accel(pangoLayout, Str.toStringz(markup), length, accelMarker, &accelChar);
	}

	/**
	 * 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.
	 *
	 * Params:
	 *     setting = new setting
	 */
	public void setSingleParagraphMode(bool setting)
	{
		pango_layout_set_single_paragraph_mode(pangoLayout, setting);
	}

	/**
	 * Sets the amount of spacing in Pango unit between the lines of the
	 * layout.
	 *
	 * Params:
	 *     spacing = the amount of spacing
	 */
	public void setSpacing(int spacing)
	{
		pango_layout_set_spacing(pangoLayout, spacing);
	}

	/**
	 * Sets the tabs to use for @layout, overriding the default tabs
	 * (by default, tabs are every 8 spaces). If @tabs is %NULL, the default
	 * tabs are reinstated. @tabs is copied into the layout; you must
	 * free your copy of @tabs yourself.
	 *
	 * Params:
	 *     tabs = a #PangoTabArray, or %NULL
	 */
	public void setTabs(PgTabArray tabs)
	{
		pango_layout_set_tabs(pangoLayout, (tabs is null) ? null : tabs.getPgTabArrayStruct());
	}

	/**
	 * Sets the text of the layout.
	 *
	 * Note that if you have used
	 * pango_layout_set_markup() or pango_layout_set_markup_with_accel() on
	 * @layout before, you may want to call pango_layout_set_attributes() to clear
	 * the attributes set on the layout from the markup as this function does not
	 * clear attributes.
	 *
	 * Params:
	 *     text = a valid UTF-8 string
	 */
	public void setText(string text)
	{
		pango_layout_set_text(pangoLayout, Str.toStringz(text), cast(int)text.length);
	}

	/**
	 * Sets the width to which the lines of the #PangoLayout should wrap or
	 * ellipsized.  The default value is -1: no width set.
	 *
	 * Params:
	 *     width = the desired width in Pango units, or -1 to indicate that no
	 *         wrapping or ellipsization should be performed.
	 */
	public void setWidth(int width)
	{
		pango_layout_set_width(pangoLayout, width);
	}

	/**
	 * Sets the wrap mode; the wrap mode only has effect if a width
	 * is set on the layout with pango_layout_set_width().
	 * To turn off wrapping, set the width to -1.
	 *
	 * Params:
	 *     wrap = the wrap mode
	 */
	public void setWrap(PangoWrapMode wrap)
	{
		pango_layout_set_wrap(pangoLayout, wrap);
	}

	/**
	 * 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 pango_layout_line_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.
	 *
	 * Params:
	 *     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
	 *     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.
	 *
	 * Returns: %TRUE if the coordinates were inside text, %FALSE otherwise.
	 */
	public bool xyToIndex(int x, int y, out int index, out int trailing)
	{
		return pango_layout_xy_to_index(pangoLayout, x, y, &index, &trailing) != 0;
	}
}