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gtk2/gtk/gtkcssprovider.c
Carlos Garnacho 0a0a1a20a7 GtkCssProvider: Make it able to parse enums.
2010-12-04 15:38:23 +01:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* 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 <string.h>
#include <stdlib.h>
#include <gtk/gtk.h>
#include <gtkstyleprovider.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <cairo/cairo-gobject.h>
#include "gtkanimationdescription.h"
#include "gtk9slice.h"
#include "gtkcssprovider.h"
/**
* SECTION:gtkcssprovider
* @Short_description: CSS-like styling for widgets
* @Title: GtkCssProvider
* @See_also: #GtkStyleContext, #GtkStyleProvider
*
* #GtkCssProvider is an object implementing #GtkStyleProvider, it is able
* to parse CSS-like input in order to style widgets.
*
* <refsect2 id="gtkcssprovider-selectors">
* <title>Widget selectors</title>
* <para>
* Selectors work in a really similar way than in common CSS, widget object
* names act as HTML tags:
* </para>
* <example>
* <title>Widgets in selectors</title>
* <programlisting>
* /&ast; Theme labels that are descendants of a window &ast;/
* GtkWindow GtkLabel {
* background-color: &num;898989;
* }
*
* /&ast; Theme notebooks, and anything that's within these &ast;/
* GtkNotebook {
* background-color: &num;a939f0;
* }
*
* /&ast; Theme combo boxes, and entries that
* are direct children of a notebook &ast;/
* GtkComboBox,
* GtkNotebook > GtkEntry {
* background-color: &num;1209a2;
* }
*
* /&ast; Theme any widget within a GtkBin &ast;/
* GtkBin * {
* font-name: Sans 20;
* }
* </programlisting>
* </example>
* <para>
* Widget names may be matched in CSS as well:
* </para>
* <example>
* <title>Widget names in selectors</title>
* <programlisting>
* /&ast; Theme a label named title-label &ast;/
* GtkLabel&num;title-label {
* font-name: Sans 15;
* }
*
* /&ast; Theme any widget named main-entry &ast;/
* &num;main-entry {
* background-color: &num;f0a810;
* }
* </programlisting>
* </example>
* <para>
* Widgets may also define different classes, so these can be matched
* in CSS:
* </para>
* <example>
* <title>Widget names in selectors</title>
* <programlisting>
* /&ast; Theme all widgets defining the class entry &ast;/
* .entry {
* foreground-color: &num;39f1f9;
* }
*
* /&ast; Theme spinbuttons' entry &ast;/
* GtkSpinButton.entry {
* foreground-color: &num;900185;
* }
* </programlisting>
* </example>
* <para>
* Container widgets may define regions, these region names may be
* referenced in CSS, it's also possible to apply :nth-child
* pseudo-class information if the widget implementation provides
* such data.
* </para>
* <example>
* <title>Region names in containers</title>
* <programlisting>
* /&ast; Theme any label within a notebook &ast;/
* GtkNotebook GtkLabel {
* foreground-color: &num;f90192;
* }
*
* /&ast; Theme labels within notebook tabs &ast;/
* GtkNotebook tab:nth-child GtkLabel {
* foreground-color: &num;703910;
* }
*
* /&ast; Theme labels in the any first notebook
* tab, both selectors are equivalent &ast;/
* GtkNotebook tab:nth-child(first) GtkLabel,
* GtkNotebook tab:first-child GtkLabel {
* foreground-color: &num;89d012;
* }
* </programlisting>
* </example>
* <para>
* Widget states may be matched as pseudoclasses.
* Given the needed widget states differ from the
* offered pseudoclasses in CSS, some are unsupported,
* and some custom ones have been added.
* </para>
* <example>
* <title>Styling specific widget states</title>
* <programlisting>
* /&ast; Theme active (pressed) buttons &ast;/
* GtkButton:active {
* background-color: &num;0274d9;
* }
*
* /&ast; Theme buttons with the mouse pointer on it &ast;/
* GtkButton:hover,
* GtkButton:prelight {
* background-color: &num;3085a9;
* }
*
* /&ast; Theme insensitive widgets, both are equivalent &ast;/
* :insensitive,
* *:insensitive {
* background-color: &num;320a91;
* }
*
* /&ast; Theme selection colors in entries &ast;/
* GtkEntry:selected {
* background-color: &num;56f9a0;
* }
*
* /&ast; Theme focused labels &ast;/
* GtkLabel:focused {
* background-color: &num;b4940f;
* }
*
* /&ast; Theme inconsistent checkbuttons &ast;/
* GtkCheckButton:inconsistent {
* background-color: &num;20395a;
* }
* </programlisting>
* </example>
* <para>
* Widget state pseudoclasses may only apply to the
* last element in a selector.
* </para>
* <para>
* All the mentioned elements may be combined to create
* complex selectors that match specific widget paths.
* As in CSS, rules apply by specificity, so the selectors
* describing the best a widget path will take precedence
* over the others.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-rules">
* <title>&commat; rules</title>
* <para>
* GTK+'s CSS supports the &commat;import rule, in order
* to load another CSS file in addition to the currently
* parsed one.
* </para>
* <example>
* <title>Using the &commat;import rule</title>
* <programlisting>
* &commat;import url (path/to/common.css)
* </programlisting>
* </example>
* <para>
* GTK+ also supports an additional &commat;define-color
* rule, in order to define a color name which may be used
* instead of color numeric representations.
* </para>
* <example>
* <title>Defining colors</title>
* <programlisting>
* &commat;define-color bg_color &num;f9a039;
*
* &ast; {
* background-color: &commat;bg_color;
* }
* </programlisting>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-symbolic-colors">
* <title>Symbolic colors</title>
* <para>
* Besides being able to define color names, the CSS
* parser is also able to read different color modifiers,
* which can also be nested, providing a rich language
* to define colors starting from other colors.
* </para>
* <example>
* <title>Using symbolic colors</title>
* <programlisting>
* &commat;define-color entry-color shade (&commat;bg_color, 0.7);
*
* GtkEntry {
* background-color: @entry-color;
* }
*
* GtkEntry:focused {
* background-color: mix (&commat;entry-color,
* shade (&num;fff, 0.5),
* 0.8);
* }
* </programlisting>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-properties">
* <title>Supported properties</title>
* <para>
* Properties are the part that differ the most to common CSS,
* not all properties are supported (some are planned to be
* supported eventually, some others are meaningless or don't
* map intuitively in a widget based environment).
* </para>
* <para>
* There is also a difference in shorthand properties, for
* example in common CSS it is fine to define a font through
* the different @font-family, @font-style, @font-size
* properties, meanwhile in GTK+'s CSS only the canonical
* @font property would be supported.
* </para>
* <para>
* The currently supported properties are:
* </para>
* <informaltable>
* <tgroup cols="4">
* <thead>
* <row>
* <entry>Property name</entry>
* <entry>Syntax</entry>
* <entry>Maps to</entry>
* <entry>Examples</entry>
* </row>
* </thead>
* <tbody>
* <row>
* <entry>engine</entry>
* <entry><programlisting>engine-name</programlisting></entry>
* <entry>#GtkThemingEngine</entry>
* <entry><programlisting>engine: clearlooks;</programlisting></entry>
* </row>
* <row>
* <entry>background-color</entry>
* <entry morerows="3"><programlisting>color</programlisting></entry>
* <entry morerows="3">#GdkColor</entry>
* <entry morerows="3">
* <programlisting>
* background-color: &num;fff;
* foreground-color: @color-name;
* text-color: shade (@color-name, 0.5);
* base-color: mix (@color-name, &num;f0f, 0.8);</programlisting>
* </entry>
* </row>
* <row>
* <entry>foreground-color</entry>
* </row>
* <row>
* <entry>text-color</entry>
* </row>
* <row>
* <entry>base-color</entry>
* </row>
* <row>
* <entry>font</entry>
* <entry><programlisting>family [style] [size]</programlisting></entry>
* <entry>#PangoFontDescription</entry>
* <entry><programlisting>font: Sans 15;</programlisting></entry>
* </row>
* <row>
* <entry>margin</entry>
* <entry morerows="1">
* <programlisting>
* width
* vertical-width horizontal-width
* top-width horizontal-width bottom-width
* top-width right-width bottom-width left-width
* </programlisting>
* </entry>
* <entry morerows="1">#GtkBorder</entry>
* <entry morerows="1">
* <programlisting>
* margin: 5;
* margin: 5 10;
* margin: 5 10 3;
* margin: 5 10 3 5;</programlisting>
* </entry>
* </row>
* <row>
* <entry>padding</entry>
* </row>
* <row>
* <entry>background-image</entry>
* <entry>
* <programlisting>
* -gtk-gradient (linear,
* starting-x-position starting-y-position,
* ending-x-position ending-y-position,
* [ [from|to] (color) |
* color-stop (percentage, color) ] )
*
* -gtk-gradient (radial,
* starting-x-position starting-y-position, starting-radius,
* ending-x-position ending-y-position, ending-radius,
* [ [from|to] (color) |
* color-stop (percentage, color) ]* )</programlisting>
* </entry>
* <entry>#cairo_pattern_t</entry>
* <entry>
* <programlisting>
* -gtk-gradient (linear,
* top left, top right,
* from (&num;fff), to (&num;000));
* -gtk-gradient (linear, 0.0 0.5, 0.5 1.0,
* from (&num;fff),
* color-stop (0.5, &num;f00),
* to (&num;000));
* -gtk-gradient (radial,
* center center, 0.2,
* center center, 0.8,
* color-stop (0.0, &num;fff),
* color-stop (1.0, &num;000));</programlisting>
* </entry>
* </row>
* <row>
* <entry>border-image</entry>
* <entry><programlisting>url([path]) top-distance right-distance bottom-distance left-distance horizontal-option vertical-option</programlisting></entry>
* <entry></entry>
* <entry>
* <programlisting>
* border-image: url (/path/to/image.png) 3 4 3 4 stretch;
* border-image: url (/path/to/image.png) 3 4 4 3 repeat stretch;</programlisting>
* </entry>
* </row>
* <row>
* <entry>transition</entry>
* <entry><programlisting>duration [s|ms] [linear|ease|ease-in|ease-out|ease-in-out]</programlisting></entry>
* <entry></entry>
* <entry>
* <programlisting>
* transition: 150ms ease-in-out;
* transition: 1s linear;</programlisting>
* </entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* </refsect2>
*/
typedef struct GtkCssProviderPrivate GtkCssProviderPrivate;
typedef struct SelectorElement SelectorElement;
typedef struct SelectorPath SelectorPath;
typedef struct SelectorStyleInfo SelectorStyleInfo;
typedef enum SelectorElementType SelectorElementType;
typedef enum CombinatorType CombinatorType;
typedef enum ParserScope ParserScope;
typedef enum ParserSymbol ParserSymbol;
enum SelectorElementType {
SELECTOR_TYPE_NAME,
SELECTOR_NAME,
SELECTOR_GTYPE,
SELECTOR_REGION,
SELECTOR_CLASS,
SELECTOR_GLOB
};
enum CombinatorType {
COMBINATOR_DESCENDANT, /* No direct relation needed */
COMBINATOR_CHILD /* Direct child */
};
struct SelectorElement
{
SelectorElementType elem_type;
CombinatorType combinator;
union
{
GQuark name;
GType type;
struct
{
GQuark name;
GtkRegionFlags flags;
} region;
};
};
struct SelectorPath
{
GSList *elements;
GtkStateFlags state;
guint ref_count;
};
struct SelectorStyleInfo
{
SelectorPath *path;
GHashTable *style;
};
struct GtkCssProviderPrivate
{
GScanner *scanner;
gchar *filename;
GHashTable *symbolic_colors;
GPtrArray *selectors_info;
/* Current parser state */
GSList *state;
GSList *cur_selectors;
GHashTable *cur_properties;
};
enum ParserScope {
SCOPE_SELECTOR,
SCOPE_PSEUDO_CLASS,
SCOPE_NTH_CHILD,
SCOPE_DECLARATION,
SCOPE_VALUE
};
/* Extend GtkStateType, since these
* values are also used as symbols
*/
enum ParserSymbol {
/* Scope: pseudo-class */
SYMBOL_NTH_CHILD = GTK_STATE_LAST,
SYMBOL_FIRST_CHILD,
SYMBOL_LAST_CHILD,
SYMBOL_DEFAULT_CHILD,
SYMBOL_SORTED_CHILD,
/* Scope: nth-child */
SYMBOL_NTH_CHILD_EVEN,
SYMBOL_NTH_CHILD_ODD,
SYMBOL_NTH_CHILD_FIRST,
SYMBOL_NTH_CHILD_LAST
};
static void gtk_css_provider_finalize (GObject *object);
static void gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface);
static void scanner_apply_scope (GScanner *scanner,
ParserScope scope);
static gboolean css_provider_parse_value (GtkCssProvider *css_provider,
const gchar *value_str,
GValue *value);
static gboolean gtk_css_provider_load_from_path_internal (GtkCssProvider *css_provider,
const gchar *path,
gboolean reset,
GError **error);
G_DEFINE_TYPE_EXTENDED (GtkCssProvider, gtk_css_provider, G_TYPE_OBJECT, 0,
G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER,
gtk_css_style_provider_iface_init));
static void
gtk_css_provider_class_init (GtkCssProviderClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_css_provider_finalize;
g_type_class_add_private (object_class, sizeof (GtkCssProviderPrivate));
}
static SelectorPath *
selector_path_new (void)
{
SelectorPath *path;
path = g_slice_new0 (SelectorPath);
path->ref_count = 1;
return path;
}
static SelectorPath *
selector_path_ref (SelectorPath *path)
{
path->ref_count++;
return path;
}
static void
selector_path_unref (SelectorPath *path)
{
path->ref_count--;
if (path->ref_count > 0)
return;
while (path->elements)
{
g_slice_free (SelectorElement, path->elements->data);
path->elements = g_slist_delete_link (path->elements, path->elements);
}
g_slice_free (SelectorPath, path);
}
static void
selector_path_prepend_type (SelectorPath *path,
const gchar *type_name)
{
SelectorElement *elem;
GType type;
elem = g_slice_new (SelectorElement);
elem->combinator = COMBINATOR_DESCENDANT;
type = g_type_from_name (type_name);
if (type == G_TYPE_INVALID)
{
elem->elem_type = SELECTOR_TYPE_NAME;
elem->name = g_quark_from_string (type_name);
}
else
{
elem->elem_type = SELECTOR_GTYPE;
elem->type = type;
}
path->elements = g_slist_prepend (path->elements, elem);
}
static void
selector_path_prepend_glob (SelectorPath *path)
{
SelectorElement *elem;
elem = g_slice_new (SelectorElement);
elem->elem_type = SELECTOR_GLOB;
elem->combinator = COMBINATOR_DESCENDANT;
path->elements = g_slist_prepend (path->elements, elem);
}
static void
selector_path_prepend_region (SelectorPath *path,
const gchar *name,
GtkRegionFlags flags)
{
SelectorElement *elem;
elem = g_slice_new (SelectorElement);
elem->combinator = COMBINATOR_DESCENDANT;
elem->elem_type = SELECTOR_REGION;
elem->region.name = g_quark_from_string (name);
elem->region.flags = flags;
path->elements = g_slist_prepend (path->elements, elem);
}
static void
selector_path_prepend_name (SelectorPath *path,
const gchar *name)
{
SelectorElement *elem;
elem = g_slice_new (SelectorElement);
elem->combinator = COMBINATOR_DESCENDANT;
elem->elem_type = SELECTOR_NAME;
elem->name = g_quark_from_string (name);
path->elements = g_slist_prepend (path->elements, elem);
}
static void
selector_path_prepend_class (SelectorPath *path,
const gchar *name)
{
SelectorElement *elem;
elem = g_slice_new (SelectorElement);
elem->combinator = COMBINATOR_DESCENDANT;
elem->elem_type = SELECTOR_CLASS;
elem->name = g_quark_from_string (name);
path->elements = g_slist_prepend (path->elements, elem);
}
static void
selector_path_prepend_combinator (SelectorPath *path,
CombinatorType combinator)
{
SelectorElement *elem;
g_assert (path->elements != NULL);
/* It is actually stored in the last element */
elem = path->elements->data;
elem->combinator = combinator;
}
static gint
selector_path_depth (SelectorPath *path)
{
return g_slist_length (path->elements);
}
static SelectorStyleInfo *
selector_style_info_new (SelectorPath *path)
{
SelectorStyleInfo *info;
info = g_slice_new0 (SelectorStyleInfo);
info->path = selector_path_ref (path);
return info;
}
static void
selector_style_info_free (SelectorStyleInfo *info)
{
if (info->style)
g_hash_table_unref (info->style);
if (info->path)
selector_path_unref (info->path);
}
static void
selector_style_info_set_style (SelectorStyleInfo *info,
GHashTable *style)
{
if (info->style)
g_hash_table_unref (info->style);
if (style)
info->style = g_hash_table_ref (style);
else
info->style = NULL;
}
static GScanner *
create_scanner (void)
{
GScanner *scanner;
scanner = g_scanner_new (NULL);
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "active", GUINT_TO_POINTER (GTK_STATE_ACTIVE));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "prelight", GUINT_TO_POINTER (GTK_STATE_PRELIGHT));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "hover", GUINT_TO_POINTER (GTK_STATE_PRELIGHT));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "selected", GUINT_TO_POINTER (GTK_STATE_SELECTED));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "insensitive", GUINT_TO_POINTER (GTK_STATE_INSENSITIVE));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "inconsistent", GUINT_TO_POINTER (GTK_STATE_INCONSISTENT));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "focused", GUINT_TO_POINTER (GTK_STATE_FOCUSED));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "nth-child", GUINT_TO_POINTER (SYMBOL_NTH_CHILD));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "first-child", GUINT_TO_POINTER (SYMBOL_FIRST_CHILD));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "last-child", GUINT_TO_POINTER (SYMBOL_LAST_CHILD));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "default", GUINT_TO_POINTER (SYMBOL_DEFAULT_CHILD));
g_scanner_scope_add_symbol (scanner, SCOPE_PSEUDO_CLASS, "sorted", GUINT_TO_POINTER (SYMBOL_SORTED_CHILD));
g_scanner_scope_add_symbol (scanner, SCOPE_NTH_CHILD, "even", GUINT_TO_POINTER (SYMBOL_NTH_CHILD_EVEN));
g_scanner_scope_add_symbol (scanner, SCOPE_NTH_CHILD, "odd", GUINT_TO_POINTER (SYMBOL_NTH_CHILD_ODD));
g_scanner_scope_add_symbol (scanner, SCOPE_NTH_CHILD, "first", GUINT_TO_POINTER (SYMBOL_NTH_CHILD_FIRST));
g_scanner_scope_add_symbol (scanner, SCOPE_NTH_CHILD, "last", GUINT_TO_POINTER (SYMBOL_NTH_CHILD_LAST));
scanner_apply_scope (scanner, SCOPE_SELECTOR);
return scanner;
}
static void
gtk_css_provider_init (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
priv = css_provider->priv = G_TYPE_INSTANCE_GET_PRIVATE (css_provider,
GTK_TYPE_CSS_PROVIDER,
GtkCssProviderPrivate);
priv->selectors_info = g_ptr_array_new_with_free_func ((GDestroyNotify) selector_style_info_free);
priv->scanner = create_scanner ();
priv->symbolic_colors = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) gtk_symbolic_color_unref);
}
typedef struct ComparePathData ComparePathData;
struct ComparePathData
{
guint64 score;
SelectorPath *path;
GSList *iter;
};
static gboolean
compare_selector_element (GtkWidgetPath *path,
guint index,
SelectorElement *elem,
guint8 *score)
{
*score = 0;
if (elem->elem_type == SELECTOR_TYPE_NAME)
{
const gchar *type_name;
GType resolved_type;
/* Resolve the type name */
type_name = g_quark_to_string (elem->name);
resolved_type = g_type_from_name (type_name);
if (resolved_type == G_TYPE_INVALID)
{
/* Type couldn't be resolved, so the selector
* clearly doesn't affect the given widget path
*/
return FALSE;
}
elem->elem_type = SELECTOR_GTYPE;
elem->type = resolved_type;
}
if (elem->elem_type == SELECTOR_GTYPE)
{
GType type;
type = gtk_widget_path_iter_get_widget_type (path, index);
if (!g_type_is_a (type, elem->type))
return FALSE;
if (type == elem->type)
*score |= 0xF;
else
{
GType parent = type;
*score = 0xE;
while ((parent = g_type_parent (parent)) != G_TYPE_INVALID)
{
if (parent == elem->type)
break;
*score -= 1;
if (*score == 1)
{
g_warning ("Hierarchy is higher than expected.");
break;
}
}
}
return TRUE;
}
else if (elem->elem_type == SELECTOR_REGION)
{
GtkRegionFlags flags;
if (!gtk_widget_path_iter_has_qregion (path, index,
elem->region.name,
&flags))
return FALSE;
if (elem->region.flags != 0 &&
(flags & elem->region.flags) == 0)
return FALSE;
*score = 0xF;
return TRUE;
}
else if (elem->elem_type == SELECTOR_GLOB)
{
/* Treat as lowest matching type */
*score = 1;
return TRUE;
}
else if (elem->elem_type == SELECTOR_NAME)
{
if (!gtk_widget_path_iter_has_qname (path, index, elem->name))
return FALSE;
*score = 0xF;
return TRUE;
}
else if (elem->elem_type == SELECTOR_CLASS)
{
if (!gtk_widget_path_iter_has_qclass (path, index, elem->name))
return FALSE;
*score = 0xF;
return TRUE;
}
return FALSE;
}
static guint64
compare_selector (GtkWidgetPath *path,
SelectorPath *selector)
{
GSList *elements = selector->elements;
gboolean match = TRUE;
guint64 score = 0;
gint i;
i = gtk_widget_path_length (path) - 1;
while (elements && match && i >= 0)
{
SelectorElement *elem;
guint8 elem_score;
elem = elements->data;
match = compare_selector_element (path, i, elem, &elem_score);
/* Only move on to the next index if there is no match
* with the current element (whether to continue or not
* handled right after in the combinator check), or a
* GType or glob has just been matched.
*
* Region and widget names do not trigger this because
* the next element in the selector path could also be
* related to the same index.
*/
if (!match ||
(elem->elem_type == SELECTOR_GTYPE ||
elem->elem_type == SELECTOR_GLOB))
i--;
if (!match &&
elem->elem_type != SELECTOR_TYPE_NAME &&
elem->combinator == COMBINATOR_DESCENDANT)
{
/* With descendant combinators there may
* be intermediate chidren in the hierarchy
*/
match = TRUE;
}
else if (match)
elements = elements->next;
if (match)
{
/* Only 4 bits are actually used */
score <<= 4;
score |= elem_score;
}
}
/* If there are pending selector
* elements to compare, it's not
* a match.
*/
if (elements)
match = FALSE;
if (!match)
score = 0;
return score;
}
typedef struct StylePriorityInfo StylePriorityInfo;
struct StylePriorityInfo
{
guint64 score;
GHashTable *style;
GtkStateFlags state;
};
static GArray *
css_provider_get_selectors (GtkCssProvider *css_provider,
GtkWidgetPath *path)
{
GtkCssProviderPrivate *priv;
GArray *priority_info;
guint i, j;
priv = css_provider->priv;
priority_info = g_array_new (FALSE, FALSE, sizeof (StylePriorityInfo));
for (i = 0; i < priv->selectors_info->len; i++)
{
SelectorStyleInfo *info;
StylePriorityInfo new;
gboolean added = FALSE;
guint64 score;
info = g_ptr_array_index (priv->selectors_info, i);
score = compare_selector (path, info->path);
if (score <= 0)
continue;
new.score = score;
new.style = info->style;
new.state = info->path->state;
for (j = 0; j < priority_info->len; j++)
{
StylePriorityInfo *cur;
cur = &g_array_index (priority_info, StylePriorityInfo, j);
if (cur->score > new.score)
{
g_array_insert_val (priority_info, j, new);
added = TRUE;
break;
}
}
if (!added)
g_array_append_val (priority_info, new);
}
return priority_info;
}
static void
css_provider_dump_symbolic_colors (GtkCssProvider *css_provider,
GtkStyleSet *set)
{
GtkCssProviderPrivate *priv;
GHashTableIter iter;
gpointer key, value;
priv = css_provider->priv;
g_hash_table_iter_init (&iter, priv->symbolic_colors);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const gchar *name;
GtkSymbolicColor *color;
name = key;
color = value;
gtk_style_set_map_color (set, name, color);
}
}
static GtkStyleSet *
gtk_css_provider_get_style (GtkStyleProvider *provider,
GtkWidgetPath *path)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
GtkStyleSet *set;
GArray *priority_info;
guint i;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
set = gtk_style_set_new ();
css_provider_dump_symbolic_colors (css_provider, set);
priority_info = css_provider_get_selectors (css_provider, path);
for (i = 0; i < priority_info->len; i++)
{
StylePriorityInfo *info;
GHashTableIter iter;
gpointer key, value;
info = &g_array_index (priority_info, StylePriorityInfo, i);
g_hash_table_iter_init (&iter, info->style);
while (g_hash_table_iter_next (&iter, &key, &value))
{
gchar *prop = key;
/* Properties starting with '-' may be both widget style properties
* or custom properties from the theming engine, so check whether
* the type is registered or not.
*/
if (prop[0] == '-' &&
!gtk_style_set_lookup_property (prop, NULL, NULL))
continue;
gtk_style_set_set_property (set, key, info->state, value);
}
}
g_array_free (priority_info, TRUE);
return set;
}
static gboolean
gtk_css_provider_get_style_property (GtkStyleProvider *provider,
GtkWidgetPath *path,
const gchar *property_name,
GValue *value)
{
GArray *priority_info;
gboolean found = FALSE;
gchar *prop_name;
GType path_type;
gint i;
path_type = gtk_widget_path_get_widget_type (path);
prop_name = g_strdup_printf ("-%s-%s",
g_type_name (path_type),
property_name);
priority_info = css_provider_get_selectors (GTK_CSS_PROVIDER (provider), path);
for (i = priority_info->len - 1; i >= 0; i--)
{
StylePriorityInfo *info;
GValue *val;
info = &g_array_index (priority_info, StylePriorityInfo, i);
val = g_hash_table_lookup (info->style, prop_name);
if (val)
{
const gchar *val_str;
val_str = g_value_get_string (val);
found = TRUE;
css_provider_parse_value (GTK_CSS_PROVIDER (provider), val_str, value);
break;
}
}
g_array_free (priority_info, TRUE);
g_free (prop_name);
return found;
}
static void
gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface)
{
iface->get_style = gtk_css_provider_get_style;
iface->get_style_property = gtk_css_provider_get_style_property;
}
static void
gtk_css_provider_finalize (GObject *object)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
css_provider = GTK_CSS_PROVIDER (object);
priv = css_provider->priv;
g_scanner_destroy (priv->scanner);
g_free (priv->filename);
g_ptr_array_free (priv->selectors_info, TRUE);
g_slist_foreach (priv->cur_selectors, (GFunc) selector_path_unref, NULL);
g_slist_free (priv->cur_selectors);
g_hash_table_unref (priv->cur_properties);
g_hash_table_destroy (priv->symbolic_colors);
G_OBJECT_CLASS (gtk_css_provider_parent_class)->finalize (object);
}
/**
* gtk_css_provider_new:
*
* Returns a newly created #GtkCssProvider.
*
* Returns: A new #GtkCssProvider
**/
GtkCssProvider *
gtk_css_provider_new (void)
{
return g_object_new (GTK_TYPE_CSS_PROVIDER, NULL);
}
static void
property_value_free (GValue *value)
{
if (G_IS_VALUE (value))
g_value_unset (value);
g_slice_free (GValue, value);
}
static void
scanner_apply_scope (GScanner *scanner,
ParserScope scope)
{
g_scanner_set_scope (scanner, scope);
if (scope == SCOPE_VALUE)
{
scanner->config->cset_identifier_first = G_CSET_a_2_z "@#-_0123456789" G_CSET_A_2_Z;
scanner->config->cset_identifier_nth = G_CSET_a_2_z "@#-_ 0123456789(),.\n" G_CSET_A_2_Z;
scanner->config->scan_identifier_1char = TRUE;
}
else if (scope == SCOPE_SELECTOR)
{
scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "*@";
scanner->config->cset_identifier_nth = G_CSET_a_2_z "-_#" G_CSET_A_2_Z;
scanner->config->scan_identifier_1char = TRUE;
}
else if (scope == SCOPE_PSEUDO_CLASS ||
scope == SCOPE_NTH_CHILD ||
scope == SCOPE_DECLARATION)
{
scanner->config->cset_identifier_first = G_CSET_a_2_z "-" G_CSET_A_2_Z;
scanner->config->cset_identifier_nth = G_CSET_a_2_z "-" G_CSET_A_2_Z;
scanner->config->scan_identifier_1char = FALSE;
}
else
g_assert_not_reached ();
scanner->config->scan_float = FALSE;
scanner->config->cpair_comment_single = NULL;
}
static void
css_provider_push_scope (GtkCssProvider *css_provider,
ParserScope scope)
{
GtkCssProviderPrivate *priv;
priv = css_provider->priv;
priv->state = g_slist_prepend (priv->state, GUINT_TO_POINTER (scope));
scanner_apply_scope (priv->scanner, scope);
}
static ParserScope
css_provider_pop_scope (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
ParserScope scope = SCOPE_SELECTOR;
priv = css_provider->priv;
if (!priv->state)
{
g_warning ("Push/pop calls to parser scope aren't paired");
scanner_apply_scope (priv->scanner, SCOPE_SELECTOR);
return SCOPE_SELECTOR;
}
priv->state = g_slist_delete_link (priv->state, priv->state);
/* Fetch new scope */
if (priv->state)
scope = GPOINTER_TO_INT (priv->state->data);
scanner_apply_scope (priv->scanner, scope);
return scope;
}
static void
css_provider_reset_parser (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
priv = css_provider->priv;
g_slist_free (priv->state);
priv->state = NULL;
scanner_apply_scope (priv->scanner, SCOPE_SELECTOR);
g_slist_foreach (priv->cur_selectors, (GFunc) selector_path_unref, NULL);
g_slist_free (priv->cur_selectors);
priv->cur_selectors = NULL;
if (priv->cur_properties)
g_hash_table_unref (priv->cur_properties);
priv->cur_properties = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) property_value_free);
}
static void
css_provider_commit (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
GSList *l;
priv = css_provider->priv;
l = priv->cur_selectors;
while (l)
{
SelectorPath *path = l->data;
SelectorStyleInfo *info;
info = selector_style_info_new (path);
selector_style_info_set_style (info, priv->cur_properties);
g_ptr_array_add (priv->selectors_info, info);
l = l->next;
}
}
static GTokenType
parse_nth_child (GtkCssProvider *css_provider,
GScanner *scanner,
GtkRegionFlags *flags)
{
ParserSymbol symbol;
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_SYMBOL)
return G_TOKEN_SYMBOL;
symbol = GPOINTER_TO_INT (scanner->value.v_symbol);
if (symbol == SYMBOL_NTH_CHILD)
{
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_LEFT_PAREN)
return G_TOKEN_LEFT_PAREN;
css_provider_push_scope (css_provider, SCOPE_NTH_CHILD);
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_SYMBOL)
return G_TOKEN_SYMBOL;
symbol = GPOINTER_TO_INT (scanner->value.v_symbol);
switch (symbol)
{
case SYMBOL_NTH_CHILD_EVEN:
*flags = GTK_REGION_EVEN;
break;
case SYMBOL_NTH_CHILD_ODD:
*flags = GTK_REGION_ODD;
break;
case SYMBOL_NTH_CHILD_FIRST:
*flags = GTK_REGION_FIRST;
break;
case SYMBOL_NTH_CHILD_LAST:
*flags = GTK_REGION_LAST;
break;
default:
break;
}
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_RIGHT_PAREN)
return G_TOKEN_RIGHT_PAREN;
css_provider_pop_scope (css_provider);
}
else if (symbol == SYMBOL_FIRST_CHILD)
*flags = GTK_REGION_FIRST;
else if (symbol == SYMBOL_LAST_CHILD)
*flags = GTK_REGION_LAST;
else if (symbol == SYMBOL_DEFAULT_CHILD)
*flags = GTK_REGION_DEFAULT;
else if (symbol == SYMBOL_SORTED_CHILD)
*flags = GTK_REGION_SORTED;
else
{
*flags = 0;
return G_TOKEN_SYMBOL;
}
return G_TOKEN_NONE;
}
static GTokenType
parse_pseudo_class (GtkCssProvider *css_provider,
GScanner *scanner,
SelectorPath *selector)
{
GtkStateType state;
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_SYMBOL)
return G_TOKEN_SYMBOL;
state = GPOINTER_TO_INT (scanner->value.v_symbol);
switch (state)
{
case GTK_STATE_ACTIVE:
selector->state |= GTK_STATE_FLAG_ACTIVE;
break;
case GTK_STATE_PRELIGHT:
selector->state |= GTK_STATE_FLAG_PRELIGHT;
break;
case GTK_STATE_SELECTED:
selector->state |= GTK_STATE_FLAG_SELECTED;
break;
case GTK_STATE_INSENSITIVE:
selector->state |= GTK_STATE_FLAG_INSENSITIVE;
break;
case GTK_STATE_INCONSISTENT:
selector->state |= GTK_STATE_FLAG_INCONSISTENT;
break;
case GTK_STATE_FOCUSED:
selector->state |= GTK_STATE_FLAG_FOCUSED;
break;
default:
return G_TOKEN_SYMBOL;
}
return G_TOKEN_NONE;
}
static GTokenType
parse_selector (GtkCssProvider *css_provider,
GScanner *scanner,
SelectorPath **selector_out)
{
SelectorPath *path;
path = selector_path_new ();
*selector_out = path;
if (scanner->token != ':' &&
scanner->token != '#' &&
scanner->token != '.' &&
scanner->token != G_TOKEN_IDENTIFIER)
return G_TOKEN_IDENTIFIER;
while (scanner->token == '#' ||
scanner->token == '.' ||
scanner->token == G_TOKEN_IDENTIFIER)
{
if (scanner->token == '#' ||
scanner->token == '.')
{
gboolean is_class;
is_class = (scanner->token == '.');
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_IDENTIFIER)
return G_TOKEN_IDENTIFIER;
selector_path_prepend_glob (path);
selector_path_prepend_combinator (path, COMBINATOR_CHILD);
if (is_class)
selector_path_prepend_class (path, scanner->value.v_identifier);
else
selector_path_prepend_name (path, scanner->value.v_identifier);
}
else if (g_ascii_isupper (scanner->value.v_identifier[0]))
{
gchar *pos;
if ((pos = strchr (scanner->value.v_identifier, '#')) != NULL ||
(pos = strchr (scanner->value.v_identifier, '.')) != NULL)
{
gchar *type_name, *name;
gboolean is_class;
is_class = (*pos == '.');
/* Widget type and name/class put together */
name = pos + 1;
*pos = '\0';
type_name = scanner->value.v_identifier;
selector_path_prepend_type (path, type_name);
/* This is only so there is a direct relationship
* between widget type and its name.
*/
selector_path_prepend_combinator (path, COMBINATOR_CHILD);
if (is_class)
selector_path_prepend_class (path, name);
else
selector_path_prepend_name (path, name);
}
else
selector_path_prepend_type (path, scanner->value.v_identifier);
}
else if (g_ascii_islower (scanner->value.v_identifier[0]))
{
GtkRegionFlags flags = 0;
gchar *region_name;
region_name = g_strdup (scanner->value.v_identifier);
if (g_scanner_peek_next_token (scanner) == ':')
{
ParserSymbol symbol;
g_scanner_get_next_token (scanner);
css_provider_push_scope (css_provider, SCOPE_PSEUDO_CLASS);
/* Check for the next token being nth-child, parse in that
* case, and fallback into common state parsing if not.
*/
if (g_scanner_peek_next_token (scanner) != G_TOKEN_SYMBOL)
return G_TOKEN_SYMBOL;
symbol = GPOINTER_TO_INT (scanner->next_value.v_symbol);
if (symbol == SYMBOL_FIRST_CHILD ||
symbol == SYMBOL_LAST_CHILD ||
symbol == SYMBOL_NTH_CHILD ||
symbol == SYMBOL_DEFAULT_CHILD ||
symbol == SYMBOL_SORTED_CHILD)
{
GTokenType token;
if ((token = parse_nth_child (css_provider, scanner, &flags)) != G_TOKEN_NONE)
return token;
css_provider_pop_scope (css_provider);
}
else
{
css_provider_pop_scope (css_provider);
selector_path_prepend_region (path, region_name, 0);
g_free (region_name);
break;
}
}
selector_path_prepend_region (path, region_name, flags);
g_free (region_name);
}
else if (scanner->value.v_identifier[0] == '*')
selector_path_prepend_glob (path);
else
return G_TOKEN_IDENTIFIER;
g_scanner_get_next_token (scanner);
if (scanner->token == '>')
{
selector_path_prepend_combinator (path, COMBINATOR_CHILD);
g_scanner_get_next_token (scanner);
}
}
if (scanner->token == ':')
{
/* Add glob selector if path is empty */
if (selector_path_depth (path) == 0)
selector_path_prepend_glob (path);
css_provider_push_scope (css_provider, SCOPE_PSEUDO_CLASS);
while (scanner->token == ':')
{
GTokenType token;
if ((token = parse_pseudo_class (css_provider, scanner, path)) != G_TOKEN_NONE)
return token;
g_scanner_get_next_token (scanner);
}
css_provider_pop_scope (css_provider);
}
return G_TOKEN_NONE;
}
#define SKIP_SPACES(s) while (s[0] == ' ' || s[0] == '\t' || s[0] == '\n') s++;
static GtkSymbolicColor *
symbolic_color_parse_str (const gchar *string,
gchar **end_ptr)
{
GtkSymbolicColor *symbolic_color = NULL;
gchar *str;
str = (gchar *) string;
if (str[0] == '#')
{
GdkColor color;
gchar *color_str;
const gchar *end;
end = str + 1;
while (g_ascii_isxdigit (*end))
end++;
color_str = g_strndup (str, end - str);
*end_ptr = (gchar *) end;
if (!gdk_color_parse (color_str, &color))
{
g_free (color_str);
return NULL;
}
symbolic_color = gtk_symbolic_color_new_literal (&color);
g_free (color_str);
}
else if (str[0] == '@')
{
const gchar *end;
gchar *name;
str++;
end = str;
while (*end == '-' || *end == '_' ||
g_ascii_isalpha (*end))
end++;
name = g_strndup (str, end - str);
symbolic_color = gtk_symbolic_color_new_name (name);
g_free (name);
*end_ptr = (gchar *) end;
}
else if (g_str_has_prefix (str, "shade"))
{
GtkSymbolicColor *param_color;
gdouble factor;
str += strlen ("shade");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
param_color = symbolic_color_parse_str (str, end_ptr);
if (!param_color)
return NULL;
str = *end_ptr;
SKIP_SPACES (str);
if (str[0] != ',')
{
gtk_symbolic_color_unref (param_color);
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
factor = g_ascii_strtod (str, end_ptr);
str = *end_ptr;
SKIP_SPACES (str);
*end_ptr = (gchar *) str;
if (str[0] != ')')
{
gtk_symbolic_color_unref (param_color);
return NULL;
}
symbolic_color = gtk_symbolic_color_new_shade (param_color, factor);
gtk_symbolic_color_unref (param_color);
(*end_ptr)++;
}
else if (g_str_has_prefix (str, "mix"))
{
GtkSymbolicColor *color1, *color2;
gdouble factor;
str += strlen ("mix");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
color1 = symbolic_color_parse_str (str, end_ptr);
if (!color1)
return NULL;
str = *end_ptr;
SKIP_SPACES (str);
if (str[0] != ',')
{
gtk_symbolic_color_unref (color1);
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
color2 = symbolic_color_parse_str (str, end_ptr);
if (!color2 || *end_ptr[0] != ',')
{
gtk_symbolic_color_unref (color1);
return NULL;
}
str = *end_ptr;
SKIP_SPACES (str);
if (str[0] != ',')
{
gtk_symbolic_color_unref (color1);
gtk_symbolic_color_unref (color2);
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
factor = g_ascii_strtod (str, end_ptr);
str = *end_ptr;
SKIP_SPACES (str);
*end_ptr = (gchar *) str;
if (str[0] != ')')
{
gtk_symbolic_color_unref (color1);
gtk_symbolic_color_unref (color2);
return NULL;
}
symbolic_color = gtk_symbolic_color_new_mix (color1, color2, factor);
gtk_symbolic_color_unref (color1);
gtk_symbolic_color_unref (color2);
(*end_ptr)++;
}
return symbolic_color;
}
static GtkSymbolicColor *
symbolic_color_parse (const gchar *str)
{
GtkSymbolicColor *color;
gchar *end;
color = symbolic_color_parse_str (str, &end);
if (*end != '\0')
{
g_warning ("Error parsing symbolic color \"%s\", stopped at char %ld : '%c'",
str, end - str, *end);
if (color)
{
gtk_symbolic_color_unref (color);
color = NULL;
}
}
return color;
}
static GtkGradient *
gradient_parse_str (const gchar *str,
gchar **end_ptr)
{
GtkGradient *gradient = NULL;
gdouble coords[6];
gchar *end;
guint i;
if (g_str_has_prefix (str, "-gtk-gradient"))
{
cairo_pattern_type_t type;
str += strlen ("-gtk-gradient");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
/* Parse gradient type */
if (g_str_has_prefix (str, "linear"))
{
type = CAIRO_PATTERN_TYPE_LINEAR;
str += strlen ("linear");
}
else if (g_str_has_prefix (str, "radial"))
{
type = CAIRO_PATTERN_TYPE_RADIAL;
str += strlen ("radial");
}
else
{
*end_ptr = (gchar *) str;
return NULL;
}
SKIP_SPACES (str);
/* Parse start/stop position parameters */
for (i = 0; i < 2; i++)
{
if (*str != ',')
{
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
if (strncmp (str, "left", 4) == 0)
{
coords[i * 3] = 0;
str += strlen ("left");
}
else if (strncmp (str, "right", 5) == 0)
{
coords[i * 3] = 1;
str += strlen ("right");
}
else if (strncmp (str, "center", 6) == 0)
{
coords[i * 3] = 0.5;
str += strlen ("center");
}
else
{
coords[i * 3] = g_ascii_strtod (str, &end);
str = end;
}
SKIP_SPACES (str);
if (strncmp (str, "top", 3) == 0)
{
coords[(i * 3) + 1] = 0;
str += strlen ("top");
}
else if (strncmp (str, "bottom", 6) == 0)
{
coords[(i * 3) + 1] = 1;
str += strlen ("bottom");
}
else if (strncmp (str, "center", 6) == 0)
{
coords[(i * 3) + 1] = 0.5;
str += strlen ("center");
}
else
{
coords[(i * 3) + 1] = g_ascii_strtod (str, &end);
str = end;
}
SKIP_SPACES (str);
if (type == CAIRO_PATTERN_TYPE_RADIAL)
{
/* Parse radius */
if (*str != ',')
{
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
coords[(i * 3) + 2] = g_ascii_strtod (str, &end);
str = end;
SKIP_SPACES (str);
}
}
if (type == CAIRO_PATTERN_TYPE_LINEAR)
gradient = gtk_gradient_new_linear (coords[0], coords[1], coords[3], coords[4]);
else
gradient = gtk_gradient_new_radial (coords[0], coords[1], coords[2],
coords[3], coords[4], coords[5]);
while (*str == ',')
{
GtkSymbolicColor *color;
gdouble position;
if (*str != ',')
{
*end_ptr = (gchar *) str;
return gradient;
}
str++;
SKIP_SPACES (str);
if (g_str_has_prefix (str, "from"))
{
position = 0;
str += strlen ("from");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return gradient;
}
}
else if (g_str_has_prefix (str, "to"))
{
position = 1;
str += strlen ("to");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return gradient;
}
}
else if (g_str_has_prefix (str, "color-stop"))
{
str += strlen ("color-stop");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return gradient;
}
str++;
SKIP_SPACES (str);
position = g_strtod (str, &end);
str = end;
SKIP_SPACES (str);
if (*str != ',')
{
*end_ptr = (gchar *) str;
return gradient;
}
}
else
{
*end_ptr = (gchar *) str;
return gradient;
}
str++;
SKIP_SPACES (str);
color = symbolic_color_parse_str (str, &end);
str = end;
SKIP_SPACES (str);
if (*str != ')')
{
*end_ptr = (gchar *) str;
return gradient;
}
str++;
SKIP_SPACES (str);
if (color)
{
gtk_gradient_add_color_stop (gradient, position, color);
gtk_symbolic_color_unref (color);
}
}
if (*str != ')')
{
*end_ptr = (gchar *) str;
return gradient;
}
str++;
}
*end_ptr = (gchar *) str;
return gradient;
}
static GtkGradient *
gradient_parse (const gchar *str)
{
GtkGradient *gradient;
gchar *end;
gradient = gradient_parse_str (str, &end);
if (*end != '\0')
{
g_warning ("Error parsing pattern \"%s\", stopped at char %ld : '%c'",
str, end - str, *end);
if (gradient)
{
gtk_gradient_unref (gradient);
gradient = NULL;
}
}
return gradient;
}
static gchar *
path_parse_str (GtkCssProvider *css_provider,
const gchar *str,
gchar **end_ptr)
{
gchar *path, *chr;
if (!g_str_has_prefix (str, "url"))
{
*end_ptr = (gchar *) str;
return NULL;
}
str += strlen ("url");
SKIP_SPACES (str);
if (*str != '(')
{
*end_ptr = (gchar *) str;
return NULL;
}
chr = strchr (str, ')');
if (!chr)
{
*end_ptr = (gchar *) str;
return NULL;
}
str++;
SKIP_SPACES (str);
path = g_strndup (str, chr - str);
g_strstrip (path);
*end_ptr = chr + 1;
/* Always return an absolute path */
if (!g_path_is_absolute (path))
{
GtkCssProviderPrivate *priv;
gchar *dirname, *full_path;
priv = css_provider->priv;
/* Use relative path to the current CSS file path, if any */
dirname = g_path_get_dirname (priv->filename);
full_path = g_build_filename (dirname, path, NULL);
g_free (path);
g_free (dirname);
path = full_path;
}
if (!g_file_test (path, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))
{
g_warning ("File doesn't exist: %s\n", path);
g_free (path);
path = NULL;
}
return path;
}
static gchar *
path_parse (GtkCssProvider *css_provider,
const gchar *str)
{
gchar *path, *end;
path = path_parse_str (css_provider, str, &end);
if (*end != '\0')
{
g_warning ("Error parsing file path \"%s\", stopped at char %ld : '%c'",
str, end - str, *end);
if (path)
{
g_free (path);
path = NULL;
}
}
return path;
}
static Gtk9Slice *
slice_parse_str (GtkCssProvider *css_provider,
const gchar *str,
gchar **end_ptr)
{
gdouble distance_top, distance_bottom;
gdouble distance_left, distance_right;
GtkSliceSideModifier mods[2];
GError *error = NULL;
GdkPixbuf *pixbuf;
Gtk9Slice *slice;
gchar *path;
gint i = 0;
SKIP_SPACES (str);
/* Parse image url */
path = path_parse_str (css_provider, str, end_ptr);
if (!path)
return NULL;
str = *end_ptr;
SKIP_SPACES (str);
/* Parse top/left/bottom/right distances */
distance_top = g_strtod (str, end_ptr);
str = *end_ptr;
SKIP_SPACES (str);
distance_right = g_strtod (str, end_ptr);
str = *end_ptr;
SKIP_SPACES (str);
distance_bottom = g_strtod (str, end_ptr);
str = *end_ptr;
SKIP_SPACES (str);
distance_left = g_strtod (str, end_ptr);
str = *end_ptr;
SKIP_SPACES (str);
while (*str && i < 2)
{
if (g_str_has_prefix (str, "stretch"))
{
str += strlen ("stretch");
mods[i] = GTK_SLICE_STRETCH;
}
else if (g_str_has_prefix (str, "repeat"))
{
str += strlen ("repeat");
mods[i] = GTK_SLICE_REPEAT;
}
else
{
g_free (path);
*end_ptr = (gchar *) str;
return NULL;
}
SKIP_SPACES (str);
i++;
}
*end_ptr = (gchar *) str;
if (*str != '\0')
{
g_free (path);
return NULL;
}
if (i != 2)
{
/* Fill in second modifier, same as the first */
mods[1] = mods[0];
}
pixbuf = gdk_pixbuf_new_from_file (path, &error);
g_free (path);
if (error)
{
g_warning ("Pixbuf could not be loaded: %s\n", error->message);
g_error_free (error);
*end_ptr = (gchar *) str;
return NULL;
}
slice = gtk_9slice_new (pixbuf,
distance_top, distance_bottom,
distance_left, distance_right,
mods[0], mods[1]);
g_object_unref (pixbuf);
return slice;
}
static Gtk9Slice *
slice_parse (GtkCssProvider *css_provider,
const gchar *str)
{
Gtk9Slice *slice;
gchar *end;
slice = slice_parse_str (css_provider, str, &end);
if (*end != '\0')
{
g_warning ("Error parsing sliced image \"%s\", stopped at char %ld : '%c'",
str, end - str, *end);
if (slice)
{
gtk_9slice_unref (slice);
slice = NULL;
}
}
return slice;
}
static gboolean
css_provider_parse_value (GtkCssProvider *css_provider,
const gchar *value_str,
GValue *value)
{
GType type;
gboolean parsed = TRUE;
type = G_VALUE_TYPE (value);
if (type == GDK_TYPE_COLOR)
{
GdkColor color;
if (gdk_color_parse (value_str, &color) == TRUE)
g_value_set_boxed (value, &color);
else
{
GtkSymbolicColor *symbolic_color;
symbolic_color = symbolic_color_parse (value_str);
if (!symbolic_color)
return FALSE;
g_value_unset (value);
g_value_init (value, GTK_TYPE_SYMBOLIC_COLOR);
g_value_take_boxed (value, symbolic_color);
}
}
else if (type == PANGO_TYPE_FONT_DESCRIPTION)
{
PangoFontDescription *font_desc;
font_desc = pango_font_description_from_string (value_str);
g_value_take_boxed (value, font_desc);
}
else if (type == G_TYPE_BOOLEAN)
{
if (value_str[0] == '1' ||
g_ascii_strcasecmp (value_str, "true") == 0)
g_value_set_boolean (value, TRUE);
else
g_value_set_boolean (value, FALSE);
}
else if (type == G_TYPE_INT)
g_value_set_int (value, atoi (value_str));
else if (type == G_TYPE_DOUBLE)
g_value_set_double (value, g_ascii_strtod (value_str, NULL));
else if (type == GTK_TYPE_THEMING_ENGINE)
{
GtkThemingEngine *engine;
engine = gtk_theming_engine_load (value_str);
g_value_set_object (value, engine);
}
else if (type == GTK_TYPE_ANIMATION_DESCRIPTION)
{
GtkAnimationDescription *desc;
desc = gtk_animation_description_from_string (value_str);
if (desc)
g_value_take_boxed (value, desc);
else
parsed = FALSE;
}
else if (type == GTK_TYPE_BORDER)
{
guint first, second, third, fourth;
GtkBorder border;
/* FIXME: no unit support */
if (sscanf (value_str, "%d %d %d %d",
&first, &second, &third, &fourth) == 4)
{
border.top = first;
border.right = second;
border.bottom = third;
border.left = fourth;
}
else if (sscanf (value_str, "%d %d %d",
&first, &second, &third) == 3)
{
border.top = first;
border.left = border.right = second;
border.bottom = third;
}
else if (sscanf (value_str, "%d %d", &first, &second) == 2)
{
border.top = border.bottom = first;
border.left = border.right = second;
}
else if (sscanf (value_str, "%d", &first) == 1)
{
border.top = border.bottom = first;
border.left = border.right = first;
}
else
parsed = FALSE;
if (parsed)
g_value_set_boxed (value, &border);
}
else if (type == CAIRO_GOBJECT_TYPE_PATTERN)
{
GtkGradient *gradient;
gradient = gradient_parse (value_str);
if (gradient)
{
g_value_unset (value);
g_value_init (value, GTK_TYPE_GRADIENT);
g_value_take_boxed (value, gradient);
}
else
parsed = FALSE;
}
else if (G_TYPE_IS_ENUM (type))
{
GEnumClass *class;
GEnumValue *enum_value;
class = g_type_class_ref (type);
enum_value = g_enum_get_value_by_nick (class, value_str);
g_value_set_enum (value, enum_value->value);
g_type_class_unref (class);
}
else if (type == GTK_TYPE_9SLICE)
{
Gtk9Slice *slice;
slice = slice_parse (css_provider, value_str);
if (slice)
g_value_take_boxed (value, slice);
else
parsed = FALSE;
}
else
{
g_warning ("Cannot parse string '%s' for type %s", value_str, g_type_name (type));
parsed = FALSE;
}
return parsed;
}
static GTokenType
parse_rule (GtkCssProvider *css_provider,
GScanner *scanner)
{
GtkCssProviderPrivate *priv;
GTokenType expected_token;
SelectorPath *selector;
priv = css_provider->priv;
css_provider_push_scope (css_provider, SCOPE_SELECTOR);
/* Handle directives */
if (scanner->token == G_TOKEN_IDENTIFIER &&
scanner->value.v_identifier[0] == '@')
{
gchar *directive;
directive = &scanner->value.v_identifier[1];
if (strcmp (directive, "define-color") == 0)
{
GtkSymbolicColor *color;
gchar *color_name, *color_str;
/* Directive is a color mapping */
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_IDENTIFIER)
return G_TOKEN_IDENTIFIER;
color_name = g_strdup (scanner->value.v_identifier);
css_provider_push_scope (css_provider, SCOPE_VALUE);
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_IDENTIFIER)
return G_TOKEN_IDENTIFIER;
color_str = g_strstrip (scanner->value.v_identifier);
color = symbolic_color_parse (color_str);
if (!color)
return G_TOKEN_IDENTIFIER;
g_hash_table_insert (priv->symbolic_colors, color_name, color);
css_provider_pop_scope (css_provider);
g_scanner_get_next_token (scanner);
if (scanner->token != ';')
return ';';
return G_TOKEN_NONE;
}
else if (strcmp (directive, "import") == 0)
{
GScanner *scanner_backup;
GSList *state_backup;
GError *error = NULL;
gboolean loaded;
gchar *path;
css_provider_push_scope (css_provider, SCOPE_VALUE);
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_IDENTIFIER)
return G_TOKEN_IDENTIFIER;
path = path_parse (css_provider,
g_strstrip (scanner->value.v_identifier));
if (!path)
return G_TOKEN_IDENTIFIER;
css_provider_pop_scope (css_provider);
g_scanner_get_next_token (scanner);
if (scanner->token != ';')
{
g_free (path);
return ';';
}
/* Snapshot current parser state and scanner in order to restore after importing */
state_backup = priv->state;
scanner_backup = priv->scanner;
priv->state = NULL;
priv->scanner = create_scanner ();
/* FIXME: Avoid recursive importing */
loaded = gtk_css_provider_load_from_path_internal (css_provider, path,
FALSE, &error);
/* Restore previous state */
css_provider_reset_parser (css_provider);
priv->state = state_backup;
g_scanner_destroy (priv->scanner);
priv->scanner = scanner_backup;
g_free (path);
if (!loaded)
{
g_warning ("Error loading imported file \"%s\": %s",
path, (error) ? error->message : "");
g_error_free (error);
return G_TOKEN_IDENTIFIER;
}
else
return G_TOKEN_NONE;
}
else
return G_TOKEN_IDENTIFIER;
}
expected_token = parse_selector (css_provider, scanner, &selector);
if (expected_token != G_TOKEN_NONE)
{
selector_path_unref (selector);
return expected_token;
}
priv->cur_selectors = g_slist_prepend (priv->cur_selectors, selector);
while (scanner->token == ',')
{
g_scanner_get_next_token (scanner);
expected_token = parse_selector (css_provider, scanner, &selector);
if (expected_token != G_TOKEN_NONE)
{
selector_path_unref (selector);
return expected_token;
}
priv->cur_selectors = g_slist_prepend (priv->cur_selectors, selector);
}
css_provider_pop_scope (css_provider);
if (scanner->token != G_TOKEN_LEFT_CURLY)
return G_TOKEN_LEFT_CURLY;
/* Declarations parsing */
css_provider_push_scope (css_provider, SCOPE_DECLARATION);
g_scanner_get_next_token (scanner);
while (scanner->token == G_TOKEN_IDENTIFIER)
{
const gchar *value_str = NULL;
GtkStylePropertyParser parse_func = NULL;
GType prop_type;
GError *error = NULL;
gchar *prop;
prop = g_strdup (scanner->value.v_identifier);
g_scanner_get_next_token (scanner);
if (scanner->token != ':')
{
g_free (prop);
return ':';
}
css_provider_push_scope (css_provider, SCOPE_VALUE);
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_IDENTIFIER)
{
g_free (prop);
return G_TOKEN_IDENTIFIER;
}
value_str = g_strstrip (scanner->value.v_identifier);
if (gtk_style_set_lookup_property (prop, &prop_type, &parse_func))
{
GValue *val;
val = g_slice_new0 (GValue);
g_value_init (val, prop_type);
if (prop_type == G_TYPE_STRING)
{
g_value_set_string (val, value_str);
g_hash_table_insert (priv->cur_properties, prop, val);
}
else if ((parse_func && (parse_func) (value_str, val, &error)) ||
(!parse_func && css_provider_parse_value (css_provider, value_str, val)))
g_hash_table_insert (priv->cur_properties, prop, val);
else
{
if (error)
{
g_warning ("Error parsing property value: %s\n", error->message);
g_error_free (error);
}
g_value_unset (val);
g_slice_free (GValue, val);
g_free (prop);
return G_TOKEN_IDENTIFIER;
}
}
else if (prop[0] == '-' &&
g_ascii_isupper (prop[1]))
{
GValue *val;
val = g_slice_new0 (GValue);
g_value_init (val, G_TYPE_STRING);
g_value_set_string (val, value_str);
g_hash_table_insert (priv->cur_properties, prop, val);
}
else
g_free (prop);
css_provider_pop_scope (css_provider);
g_scanner_get_next_token (scanner);
if (scanner->token != ';')
return ';';
g_scanner_get_next_token (scanner);
}
if (scanner->token != G_TOKEN_RIGHT_CURLY)
return G_TOKEN_RIGHT_CURLY;
css_provider_pop_scope (css_provider);
return G_TOKEN_NONE;
}
static gboolean
parse_stylesheet (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
priv = css_provider->priv;
g_scanner_get_next_token (priv->scanner);
while (!g_scanner_eof (priv->scanner))
{
GTokenType expected_token;
css_provider_reset_parser (css_provider);
expected_token = parse_rule (css_provider, priv->scanner);
if (expected_token != G_TOKEN_NONE)
{
g_scanner_unexp_token (priv->scanner, expected_token,
NULL, NULL, NULL,
"Error parsing style resource", FALSE);
while (!g_scanner_eof (priv->scanner) &&
priv->scanner->token != G_TOKEN_RIGHT_CURLY)
g_scanner_get_next_token (priv->scanner);
}
else
css_provider_commit (css_provider);
g_scanner_get_next_token (priv->scanner);
}
return TRUE;
}
/**
* gtk_css_provider_load_from_data:
* @css_provider: a #GtkCssProvider
* @data: CSS data loaded in memory
* @length: the length of @data in bytes, or -1 for NUL terminated strings
* @error: (out) (allow-none): return location for a #GError, or %NULL
*
* Loads @data into @css_provider, making it clear any previously loaded
* information.
*
* Returns: %TRUE if the data could be loaded.
**/
gboolean
gtk_css_provider_load_from_data (GtkCssProvider *css_provider,
const gchar *data,
gssize length,
GError *error)
{
GtkCssProviderPrivate *priv;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (data != NULL, FALSE);
priv = css_provider->priv;
if (length < 0)
length = strlen (data);
if (priv->selectors_info->len > 0)
g_ptr_array_remove_range (priv->selectors_info, 0, priv->selectors_info->len);
priv->scanner->input_name = "-";
g_scanner_input_text (priv->scanner, data, (guint) length);
g_free (priv->filename);
priv->filename = NULL;
parse_stylesheet (css_provider);
return TRUE;
}
/**
* gtk_css_provider_load_from_file:
* @css_provider: a #GtkCssProvider
* @file: #GFile pointing to a file to load
* @error: (out) (allow-none): return location for a #GError, or %NULL
*
* Loads the data contained in @file into @css_provider, making it
* clear any previously loaded information.
*
* Returns: %TRUE if the data could be loaded.
**/
gboolean
gtk_css_provider_load_from_file (GtkCssProvider *css_provider,
GFile *file,
GError **error)
{
GtkCssProviderPrivate *priv;
GError *internal_error = NULL;
gchar *data;
gsize length;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (G_IS_FILE (file), FALSE);
priv = css_provider->priv;
if (!g_file_load_contents (file, NULL,
&data, &length,
NULL, &internal_error))
{
g_propagate_error (error, internal_error);
return FALSE;
}
if (priv->selectors_info->len > 0)
g_ptr_array_remove_range (priv->selectors_info, 0, priv->selectors_info->len);
g_free (priv->filename);
priv->filename = g_file_get_path (file);
priv->scanner->input_name = priv->filename;
g_scanner_input_text (priv->scanner, data, (guint) length);
parse_stylesheet (css_provider);
g_free (data);
return TRUE;
}
static gboolean
gtk_css_provider_load_from_path_internal (GtkCssProvider *css_provider,
const gchar *path,
gboolean reset,
GError **error)
{
GtkCssProviderPrivate *priv;
GError *internal_error = NULL;
GMappedFile *mapped_file;
const gchar *data;
gsize length;
priv = css_provider->priv;
mapped_file = g_mapped_file_new (path, FALSE, &internal_error);
if (internal_error)
{
g_propagate_error (error, internal_error);
return FALSE;
}
length = g_mapped_file_get_length (mapped_file);
data = g_mapped_file_get_contents (mapped_file);
/* FIXME: Set error */
if (!data)
return FALSE;
if (reset)
{
if (priv->selectors_info->len > 0)
g_ptr_array_remove_range (priv->selectors_info, 0, priv->selectors_info->len);
g_free (priv->filename);
priv->filename = g_strdup (path);
}
priv->scanner->input_name = priv->filename;
g_scanner_input_text (priv->scanner, data, (guint) length);
parse_stylesheet (css_provider);
g_mapped_file_unref (mapped_file);
return TRUE;
}
/**
* gtk_css_provider_load_from_path:
* @css_provider: a #GtkCssProvider
* @path: the path of a filename to load, in the GLib filename encoding
* @error: (out) (allow-none): return location for a #GError, or %NULL
*
* Loads the data contained in @path into @css_provider, making it clear
* any previously loaded information.
*
* Returns: %TRUE if the data could be loaded.
**/
gboolean
gtk_css_provider_load_from_path (GtkCssProvider *css_provider,
const gchar *path,
GError **error)
{
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (path != NULL, FALSE);
return gtk_css_provider_load_from_path_internal (css_provider, path,
TRUE, error);
}
/**
* gtk_css_provider_get_default:
*
* Returns the provider containing the style settings used as a
* fallback for all widgets.
*
* Returns: (transfer none): The provider used for fallback styling.
* This memory is owned by GTK+, and you must not free it.
**/
GtkCssProvider *
gtk_css_provider_get_default (void)
{
static GtkCssProvider *provider;
if (G_UNLIKELY (!provider))
{
const gchar *str =
"@define-color fg_color #000; \n"
"@define-color bg_color #dcdad5; \n"
"@define-color text_color #000; \n"
"@define-color base_color #fff; \n"
"@define-color selected_bg_color #4b6983; \n"
"@define-color selected_fg_color #fff; \n"
"@define-color tooltip_bg_color #eee1b3; \n"
"@define-color tooltip_fg_color #000; \n"
"\n"
"*,\n"
"GtkTreeView > GtkButton {\n"
" background-color: @bg_color;\n"
" foreground-color: @fg_color;\n"
" text-color: @text_color; \n"
" base-color: @base_color; \n"
" padding: 2 2; \n"
"}\n"
"\n"
"*:prelight {\n"
" background-color: #eeebe7;\n"
" foreground-color: #000000;\n"
" text-color: #eeebe7; \n"
" base-color: #ffffff; \n"
"}\n"
"\n"
"*:selected {\n"
" background-color: #4b6983;\n"
" foreground-color: #ffffff;\n"
" base-color: #4b6983;\n"
" text-color: #ffffff;\n"
"}\n"
"\n"
"*:insensitive {\n"
" background-color: #dcdad5;\n"
" foreground-color: #757575;\n"
"}\n"
"\n"
"GtkTreeView, GtkIconView {\n"
" background-color: #ffffff; \n"
"}\n"
"\n"
"GtkTreeView > row:nth-child(odd) { \n"
" background-color: shade(#ffffff, 0.93); \n"
"}\n"
"\n"
".tooltip {\n"
" background-color: @tooltip_bg_color; \n"
" foreground-color: @tooltip_fg_color; \n"
"}\n"
"\n"
"GtkToggleButton:prelight {\n"
" text-color: #000; \n"
"}\n"
"\n"
".button:active {\n"
" background-color: #c4c2bd;\n"
" foreground-color: #000000;\n"
" text-color: #c4c2bd; \n"
" base-color: #9c9a94; \n"
"}\n"
"\n";
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, str, -1, NULL);
}
return provider;
}
static gchar *
css_provider_get_theme_dir (void)
{
const gchar *var;
gchar *path;
var = g_getenv ("GTK_DATA_PREFIX");
if (var)
path = g_build_filename (var, "share", "themes", NULL);
else
path = g_build_filename (GTK_DATA_PREFIX, "share", "themes", NULL);
return path;
}
/**
* gtk_css_provider_get_named:
* @name: A theme name
* @variant: variant to load, for example, "dark", or %NULL for the default
*
*
*
* Returns: (transfer none): The provider used for fallback styling.
* This memory is owned by GTK+, and you must not free it.
**/
GtkCssProvider *
gtk_css_provider_get_named (const gchar *name,
const gchar *variant)
{
static GHashTable *themes = NULL;
GtkCssProvider *provider;
if (G_UNLIKELY (!themes))
themes = g_hash_table_new (g_str_hash, g_str_equal);
provider = g_hash_table_lookup (themes, name);
if (!provider)
{
const gchar *home_dir;
gchar *subpath, *path = NULL;
if (variant)
subpath = g_strdup_printf ("gtk-%d.0" G_DIR_SEPARATOR_S "gtk-%s.css", GTK_MAJOR_VERSION, variant);
else
subpath = g_strdup_printf ("gtk-%d.0" G_DIR_SEPARATOR_S "gtk.css", GTK_MAJOR_VERSION);
/* First look in the users home directory
*/
home_dir = g_get_home_dir ();
if (home_dir)
{
path = g_build_filename (home_dir, ".themes", name, subpath, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
g_free (path);
path = NULL;
}
}
if (!path)
{
gchar *theme_dir = css_provider_get_theme_dir ();
path = g_build_filename (theme_dir, name, subpath, NULL);
g_free (theme_dir);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
g_free (path);
path = NULL;
}
}
if (path)
{
GtkCssProvider *provider;
GError *error = NULL;
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_path (provider, path, &error);
if (error)
{
g_warning ("Could not load named theme \"%s\": %s", name, error->message);
g_error_free (error);
g_object_unref (provider);
provider = NULL;
}
else
g_hash_table_insert (themes, g_strdup (name), provider);
}
}
return provider;
}
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