gtk2/gtk/css/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
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcsssection.h"
#include "gtkcssparserprivate.h"
struct _GtkCssSection
{
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int ref_count;
GtkCssSection *parent;
GFile *file;
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GtkCssLocation start_location;
GtkCssLocation end_location; /* end location if parser is %NULL */
};
G_DEFINE_BOXED_TYPE (GtkCssSection, gtk_css_section, gtk_css_section_ref, gtk_css_section_unref)
/**
* gtk_css_section_new: (constructor)
* @file: (nullable) (transfer none): The file this section refers to
* @start: The start location
* @end: The end location
*
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* Creates a new `GtkCssSection` referring to the section
* in the given `file` from the `start` location to the
* `end` location.
*
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* Returns: (transfer full): a new `GtkCssSection`
**/
GtkCssSection *
gtk_css_section_new (GFile *file,
const GtkCssLocation *start,
const GtkCssLocation *end)
{
GtkCssSection *result;
g_return_val_if_fail (file == NULL || G_IS_FILE (file), NULL);
g_return_val_if_fail (start != NULL, NULL);
g_return_val_if_fail (end != NULL, NULL);
result = g_slice_new0 (GtkCssSection);
result->ref_count = 1;
if (file)
result->file = g_object_ref (file);
result->start_location = *start;
result->end_location = *end;
return result;
}
/**
* gtk_css_section_ref:
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* @section: a `GtkCssSection`
*
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* Increments the reference count on `section`.
*
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* Returns: (transfer full): the CSS section itself.
**/
GtkCssSection *
gtk_css_section_ref (GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, NULL);
section->ref_count += 1;
return section;
}
/**
* gtk_css_section_unref:
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* @section: (transfer full): a `GtkCssSection`
*
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* Decrements the reference count on `section`, freeing the
* structure if the reference count reaches 0.
**/
void
gtk_css_section_unref (GtkCssSection *section)
{
g_return_if_fail (section != NULL);
section->ref_count -= 1;
if (section->ref_count > 0)
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_parent:
* @section: the section
*
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* 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_DOCUMEN`T. Their parent will
* either be `NULL` if they are the original CSS document that was loaded by
* [method@Gtk.CssProvider.load_from_file] or a section of type
* `GTK_CSS_SECTION_IMPORT` if it was loaded with an `@import` rule from
* a different file.
*
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* Returns: (nullable) (transfer none): the parent section
**/
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
*
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* Gets the file that @section was parsed from.
*
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* If no such file exists, for example because the CSS was loaded via
* [method@Gtk.CssProvider.load_from_data], then `NULL` is returned.
*
* Returns: (transfer none) (nullable): the `GFile` from which the `section`
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* was parsed
**/
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_location:
* @section: the section
*
* Returns the location in the CSS document where this section starts.
*
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* Returns: (transfer none) (not nullable): The start location of
* this section
*/
const GtkCssLocation *
gtk_css_section_get_start_location (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, NULL);
return &section->start_location;
}
/**
* gtk_css_section_get_end_location:
* @section: the section
*
* Returns the location in the CSS document where this section ends.
*
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* Returns: (transfer none) (not nullable): The end location of
* this section
*/
const GtkCssLocation *
gtk_css_section_get_end_location (const GtkCssSection *section)
{
g_return_val_if_fail (section != NULL, NULL);
return &section->end_location;
}
/**
* gtk_css_section_print:
* @section: a section
* @string: a `GString` to print to
*
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* Prints the `section` into `string` in a human-readable form.
*
* This is a form like `gtk.css:32:1-23` to denote line 32, characters
* 1 to 23 in the file `gtk.css`.
**/
void
gtk_css_section_print (const GtkCssSection *section,
GString *string)
{
if (section->file)
{
GFileInfo *info;
info = g_file_query_info (section->file, G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME, 0, NULL, NULL);
if (info)
{
g_string_append (string, g_file_info_get_display_name (info));
g_object_unref (info);
}
else
{
g_string_append (string, "<broken file>");
}
}
else
{
g_string_append (string, "<data>");
}
g_string_append_printf (string, ":%zu:%zu",
section->start_location.lines + 1,
section->start_location.line_chars + 1);
if (section->start_location.lines != section->end_location.lines ||
section->start_location.line_chars != section->end_location.line_chars)
{
g_string_append (string, "-");
if (section->start_location.lines != section->end_location.lines)
g_string_append_printf (string, "%zu:", section->end_location.lines + 1);
g_string_append_printf (string, "%zu", section->end_location.line_chars + 1);
}
}
/**
* gtk_css_section_to_string:
* @section: a `GtkCssSection`
*
* Prints the section into a human-readable text form using
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* [method@Gtk.CssSection.print].
*
* Returns: (transfer full): A new string.
**/
char *
gtk_css_section_to_string (const GtkCssSection *section)
{
GString *string;
g_return_val_if_fail (section != NULL, NULL);
string = g_string_new (NULL);
gtk_css_section_print (section, string);
return g_string_free (string, FALSE);
}