gtk2/gtk/gtkcsssection.c

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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* This library 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 2 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gtkcsssectionprivate.h"
#include "gtkcssparserprivate.h"
/**
* GtkCssSection:
*
* Defines a part of a CSS document. Because sections are nested into
* one another, you can use gtk_css_section_get_parent() to get the
* containing region.
*
* Since: 3.2
*/
struct _GtkCssSection
{
volatile gint ref_count;
GtkCssSectionType section_type;
GtkCssSection *parent;
GFile *file;
guint start_line;
guint start_position;
GtkCssParser *parser; /* parser if section isn't finished parsing yet or %NULL */
guint end_line; /* end line if parser is %NULL */
guint end_position; /* end position if parser is %NULL */
};
G_DEFINE_BOXED_TYPE (GtkCssSection, gtk_css_section, gtk_css_section_ref, gtk_css_section_unref)
GtkCssSection *
_gtk_css_section_new (GtkCssSection *parent,
GtkCssSectionType type,
GtkCssParser *parser,
GFile *file)
{
GtkCssSection *section;
g_return_val_if_fail (parser != NULL, NULL);
g_return_val_if_fail (file == NULL || G_IS_FILE (file), NULL);
section = g_slice_new0 (GtkCssSection);
section->ref_count = 1;
section->section_type = type;
if (parent)
section->parent = gtk_css_section_ref (parent);
if (file)
section->file = g_object_ref (file);
section->start_line = _gtk_css_parser_get_line (parser);
section->start_position = _gtk_css_parser_get_position (parser);
section->parser = parser;
return section;
}
GtkCssSection *
_gtk_css_section_new_for_file (GtkCssSectionType type,
GFile *file)
{
GtkCssSection *section;
g_return_val_if_fail (G_IS_FILE (file), NULL);
section = g_slice_new0 (GtkCssSection);
section->ref_count = 1;
section->section_type = type;
section->file = g_object_ref (file);
return section;
}
void
_gtk_css_section_end (GtkCssSection *section)
{
g_return_if_fail (section != NULL);
g_return_if_fail (section->parser != NULL);
section->end_line = _gtk_css_parser_get_line (section->parser);
section->end_position = _gtk_css_parser_get_position (section->parser);
section->parser = NULL;
}
/**
* gtk_css_section_ref:
* @section: a #GtkCssSection
*
* Increments the reference count on @section.
*
* Returns: @section itself.
*
* Since: 3.2
**/
GtkCssSection *
gtk_css_section_ref (GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, NULL);
g_atomic_int_add (&section->ref_count, 1);
return section;
}
/**
* gtk_css_section_unref:
* @section: a #GtkCssSection
*
* Decrements the reference count on @section, freeing the
* structure if the reference count reaches 0.
*
* Since: 3.2
**/
void
gtk_css_section_unref (GtkCssSection *section)
{
g_return_if_fail (section != NULL);
if (!g_atomic_int_dec_and_test (&section->ref_count))
return;
if (section->parent)
gtk_css_section_unref (section->parent);
if (section->file)
g_object_unref (section->file);
g_slice_free (GtkCssSection, section);
}
/**
* gtk_css_section_get_section_type:
* @section: the section
*
* Gets the type of information that @section describes.
*
* Returns: the type of @section
*
* Since: 3.2
**/
GtkCssSectionType
gtk_css_section_get_section_type (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, GTK_CSS_SECTION_DOCUMENT);
return section->section_type;
}
/**
* gtk_css_section_get_parent:
* @section: the section
*
* Gets the parent section for the given @section. The parent section is
* the section that contains this @section. A special case are sections of
* type #GTK_CSS_SECTION_TYPE_DOCUMENT. Their parent will either be %NULL
* if they are the original CSS document that was loaded by
* gtk_css_provider_load_from_file() or a section of type
* #GTK_CSS_SECTION_TYPE_IMPORT if it was loaded with an import rule from
* a different file.
*
* Returns: the parent section or %NULL if none
*
* Since: 3.2
**/
GtkCssSection *
gtk_css_section_get_parent (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, NULL);
return section->parent;
}
/**
* gtk_css_section_get_file:
* @section: the section
*
* Gets the file that @section was parsed from. If no such file exists,
* for example because the CSS was loaded via
* @gtk_css_provider_load_from_data(), then %NULL is returned.
*
* Returns: the #GFile that @section was parsed from or %NULL if
* @section was parsed from other data.
*
* Since: 3.2
**/
GFile *
gtk_css_section_get_file (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, NULL);
return section->file;
}
/**
* gtk_css_section_get_start_line:
* @section: the section
*
* Returns the line in the CSS document where this section starts.
* The line number is 0-indexed, so the first line of the document
* will return 0.
*
* Returns: the line number
*
* Since: 3.2
**/
guint
gtk_css_section_get_start_line (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, 0);
return section->start_line;
}
/**
* gtk_css_section_get_start_position:
* @section: the section
*
* Returns the offset in bytes from the start of the current line
* returned via gtk_css_section_get_start_line().
*
* Returns: the offset in bytes from the start of the line.
*
* Since: 3.2
**/
guint
gtk_css_section_get_start_position (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, 0);
return section->start_position;
}
/**
* gtk_css_section_get_end_line:
* @section: the section
*
* Returns the line in the CSS document where this section end.
* The line number is 0-indexed, so the first line of the document
* will return 0.
* This value may change in future invocations of this function if
* @section is not yet parsed completely. This will for example
* happen in the GtkCssProvider::parsing-error signal.
* The end position and line may be identical to the start
* position and line for sections which failed to parse anything
* successfully.
*
* Returns: the line number
*
* Since: 3.2
**/
guint
gtk_css_section_get_end_line (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, 0);
if (section->parser)
return _gtk_css_parser_get_line (section->parser);
else
return section->end_line;
}
/**
* gtk_css_section_get_start_position:
* @section: the section
*
* Returns the offset in bytes from the start of the current line
* returned via gtk_css_section_get_end_line().
* This value may change in future invocations of this function if
* @section is not yet parsed completely. This will for example
* happen in the GtkCssProvider::parsing-error signal.
* The end position and line may be identical to the start
* position and line for sections which failed to parse anything
* successfully.
*
* Returns: the offset in bytes from the start of the line.
*
* Since: 3.2
**/
guint
gtk_css_section_get_end_position (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, 0);
if (section->parser)
return _gtk_css_parser_get_position (section->parser);
else
return section->end_position;
}