/* 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 <gdk-pixbuf/gdk-pixbuf.h>
#include <cairo-gobject.h>
#include "gtkcssproviderprivate.h"
#include "gtkcssparserprivate.h"
#include "gtkcssselectorprivate.h"
#include "gtksymboliccolor.h"
#include "gtkstyleprovider.h"
#include "gtkstylecontextprivate.h"
#include "gtkstylepropertiesprivate.h"
#include "gtkstylepropertyprivate.h"
#include "gtkbindings.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkcssprovider
* @Short_description: CSS-like styling for widgets
* @Title: GtkCssProvider
* @See_also: #GtkStyleContext, #GtkStyleProvider
*
* GtkCssProvider is an object implementing the #GtkStyleProvider interface.
* It is able to parse <ulink url="http://www.w3.org/TR/CSS2">CSS</ulink>-like
* input in order to style widgets.
*
* <refsect2 id="gtkcssprovider-files">
* <title>Default files</title>
* <para>
* An application can cause GTK+ to parse a specific CSS style sheet by
* calling gtk_css_provider_load_from_file() and adding the provider with
* gtk_style_context_add_provider() or gtk_style_context_add_provider_for_screen().
* In addition, certain files will be read when GTK+ is initialized. First,
* the file <filename><envar>$XDG_CONFIG_HOME</envar>/gtk-3.0/gtk.css</filename>
* is loaded if it exists. Then, GTK+ tries to load
* <filename><envar>$HOME</envar>/.themes/<replaceable>theme-name</replaceable>/gtk-3.0/gtk.css</filename>,
* falling back to
* <filename><replaceable>datadir</replaceable>/share/themes/<replaceable>theme-name</replaceable>/gtk-3.0/gtk.css</filename>,
* where <replaceable>theme-name</replaceable> is the name of the current theme
* (see the #GtkSettings:gtk-theme-name setting) and <replaceable>datadir</replaceable>
* is the prefix configured when GTK+ was compiled, unless overridden by the
* <envar>GTK_DATA_PREFIX</envar> environment variable.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-stylesheets">
* <title>Style sheets</title>
* <para>
* The basic structure of the style sheets understood by this provider is
* a series of statements, which are either rule sets or '@-rules', separated
* by whitespace.
* </para>
* <para>
* A rule set consists of a selector and a declaration block, which is
* a series of declarations enclosed in curly braces ({ and }). The
* declarations are separated by semicolons (;). Multiple selectors can
* share the same declaration block, by putting all the separators in
* front of the block, separated by commas.
* </para>
* <example><title>A rule set with two selectors</title>
* <programlisting language="text">
* GtkButton, GtkEntry {
* color: #ff00ea;
* font: Comic Sans 12
* }
* </programlisting>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-selectors">
* <title>Selectors</title>
* <para>
* Selectors work very similar to the way they do in CSS, with widget class
* names taking the role of element names, and widget names taking the role
* of IDs. When used in a selector, widget names must be prefixed with a
* '#' character. The '*' character represents the so-called universal
* selector, which matches any widget.
* </para>
* <para>
* To express more complicated situations, selectors can be combined in
* various ways:
* <itemizedlist>
* <listitem><para>To require that a widget satisfies several conditions,
* combine several selectors into one by concatenating them. E.g.
* <literal>GtkButton#button1</literal> matches a GtkButton widget
* with the name button1.</para></listitem>
* <listitem><para>To only match a widget when it occurs inside some other
* widget, write the two selectors after each other, separated by whitespace.
* E.g. <literal>GtkToolBar GtkButton</literal> matches GtkButton widgets
* that occur inside a GtkToolBar.</para></listitem>
* <listitem><para>In the previous example, the GtkButton is matched even
* if it occurs deeply nested inside the toolbar. To restrict the match
* to direct children of the parent widget, insert a '>' character between
* the two selectors. E.g. <literal>GtkNotebook > GtkLabel</literal> matches
* GtkLabel widgets that are direct children of a GtkNotebook.</para></listitem>
* </itemizedlist>
* </para>
* <example>
* <title>Widget classes and names in selectors</title>
* <programlisting language="text">
* /* Theme labels that are descendants of a window */
* GtkWindow GtkLabel {
* background-color: #898989
* }
*
* /* Theme notebooks, and anything that's within these */
* GtkNotebook {
* background-color: #a939f0
* }
*
* /* Theme combo boxes, and entries that
* are direct children of a notebook */
* GtkComboBox,
* GtkNotebook > GtkEntry {
* color: @fg_color;
* background-color: #1209a2
* }
*
* /* Theme any widget within a GtkBin */
* GtkBin * {
* font: Sans 20
* }
*
* /* Theme a label named title-label */
* GtkLabel#title-label {
* font: Sans 15
* }
*
* /* Theme any widget named main-entry */
* #main-entry {
* background-color: #f0a810
* }
* </programlisting>
* </example>
* <para>
* Widgets may also define style classes, which can be used for matching.
* When used in a selector, style classes must be prefixed with a '.'
* character.
* </para>
* <para>
* Refer to the documentation of individual widgets to learn which
* style classes they define and see <xref linkend="gtkstylecontext-classes"/>
* for a list of all style classes used by GTK+ widgets.
* </para>
* <para>
* Note that there is some ambiguity in the selector syntax when it comes
* to differentiation widget class names from regions. GTK+ currently treats
* a string as a widget class name if it contains any uppercase characters
* (which should work for more widgets with names like GtkLabel).
* </para>
* <example>
* <title>Style classes in selectors</title>
* <programlisting language="text">
* /* Theme all widgets defining the class entry */
* .entry {
* color: #39f1f9;
* }
*
* /* Theme spinbuttons' entry */
* GtkSpinButton.entry {
* color: #900185
* }
* </programlisting>
* </example>
* <para>
* In complicated widgets like e.g. a GtkNotebook, it may be desirable
* to style different parts of the widget differently. To make this
* possible, container widgets may define regions, whose names
* may be used for matching in selectors.
* </para>
* <para>
* Some containers allow to further differentiate between regions by
* applying so-called pseudo-classes to the region. For example, the
* tab region in GtkNotebook allows to single out the first or last
* tab by using the :first-child or :last-child pseudo-class.
* When used in selectors, pseudo-classes must be prefixed with a
* ':' character.
* </para>
* <para>
* Refer to the documentation of individual widgets to learn which
* regions and pseudo-classes they define and see
* <xref linkend="gtkstylecontext-classes"/> for a list of all regions
* used by GTK+ widgets.
* </para>
* <example>
* <title>Regions in selectors</title>
* <programlisting language="text">
* /* Theme any label within a notebook */
* GtkNotebook GtkLabel {
* color: #f90192;
* }
*
* /* Theme labels within notebook tabs */
* GtkNotebook tab GtkLabel {
* color: #703910;
* }
*
* /* Theme labels in the any first notebook
* tab, both selectors are equivalent */
* GtkNotebook tab:nth-child(first) GtkLabel,
* GtkNotebook tab:first-child GtkLabel {
* color: #89d012;
* }
* </programlisting>
* </example>
* <para>
* Another use of pseudo-classes is to match widgets depending on their
* state. This is conceptually similar to the :hover, :active or :focus
* pseudo-classes in CSS. The available pseudo-classes for widget states
* are :active, :prelight (or :hover), :insensitive, :selected, :focused
* and :inconsistent.
* </para>
* <example>
* <title>Styling specific widget states</title>
* <programlisting language="text">
* /* Theme active (pressed) buttons */
* GtkButton:active {
* background-color: #0274d9;
* }
*
* /* Theme buttons with the mouse pointer on it,
* both are equivalent */
* GtkButton:hover,
* GtkButton:prelight {
* background-color: #3085a9;
* }
*
* /* Theme insensitive widgets, both are equivalent */
* :insensitive,
* *:insensitive {
* background-color: #320a91;
* }
*
* /* Theme selection colors in entries */
* GtkEntry:selected {
* background-color: #56f9a0;
* }
*
* /* Theme focused labels */
* GtkLabel:focused {
* background-color: #b4940f;
* }
*
* /* Theme inconsistent checkbuttons */
* GtkCheckButton:inconsistent {
* background-color: #20395a;
* }
* </programlisting>
* </example>
* <para>
* Widget state pseudoclasses may only apply to the last element
* in a selector.
* </para>
* <para>
* To determine the effective style for a widget, all the matching rule
* sets are merged. As in CSS, rules apply by specificity, so the rules
* whose selectors more closely match a widget path will take precedence
* over the others.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-rules">
* <title>@ Rules</title>
* <para>
* GTK+'s CSS supports the @import rule, in order to load another
* CSS style sheet in addition to the currently parsed one.
* </para>
* <example>
* <title>Using the @import rule</title>
* <programlisting language="text">
* @import url ("path/to/common.css");
* </programlisting>
* </example>
* <para id="css-binding-set">
* In order to extend key bindings affecting different widgets, GTK+
* supports the @binding-set rule to parse a set of bind/unbind
* directives, see #GtkBindingSet for the supported syntax. Note that
* the binding sets defined in this way must be associated with rule sets
* by setting the gtk-key-bindings style property.
* </para>
* <para>
* Customized key bindings are typically defined in a separate
* <filename>gtk-keys.css</filename> CSS file and GTK+ loads this file
* according to the current key theme, which is defined by the
* #GtkSettings:gtk-key-theme-name setting.
* </para>
* <example>
* <title>Using the @binding rule</title>
* <programlisting language="text">
* @binding-set binding-set1 {
* bind "<alt>Left" { "move-cursor" (visual-positions, -3, 0) };
* unbind "End";
* };
*
* @binding-set binding-set2 {
* bind "<alt>Right" { "move-cursor" (visual-positions, 3, 0) };
* bind "<alt>KP_space" { "delete-from-cursor" (whitespace, 1)
* "insert-at-cursor" (" ") };
* };
*
* GtkEntry {
* gtk-key-bindings: binding-set1, binding-set2;
* }
* </programlisting>
* </example>
* <para>
* GTK+ also supports an additional @define-color rule, in order
* to define a color name which may be used instead of color numeric
* representations. Also see the #GtkSettings:gtk-color-scheme setting
* for a way to override the values of these named colors.
* </para>
* <example>
* <title>Defining colors</title>
* <programlisting language="text">
* @define-color bg_color #f9a039;
*
* * {
* background-color: @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 expressions, which can also be nested, providing
* a rich language to define colors which are derived from a set of base
* colors.
* </para>
* <example>
* <title>Using symbolic colors</title>
* <programlisting language="text">
* @define-color entry-color shade (@bg_color, 0.7);
*
* GtkEntry {
* background-color: @entry-color;
* }
*
* GtkEntry:focused {
* background-color: mix (@entry-color,
* shade (#fff, 0.5),
* 0.8);
* }
* </programlisting>
* </example>
* <para>
* The various ways to express colors in GTK+ CSS are:
* </para>
* <informaltable>
* <tgroup cols="3">
* <thead>
* <row>
* <entry>Syntax</entry>
* <entry>Explanation</entry>
* <entry>Examples</entry>
* </row>
* </thead>
* <tbody>
* <row>
* <entry>rgb(@r, @g, @b)</entry>
* <entry>An opaque color; @r, @g, @b can be either integers between
* 0 and 255 or percentages</entry>
* <entry><literallayout>rgb(128, 10, 54)
* rgb(20%, 30%, 0%)</literallayout></entry>
* </row>
* <row>
* <entry>rgba(@r, @g, @b, @a)</entry>
* <entry>A translucent color; @r, @g, @b are as in the previous row,
* @a is a floating point number between 0 and 1</entry>
* <entry><literallayout>rgba(255, 255, 0, 0.5)</literallayout></entry>
* </row>
* <row>
* <entry>#@xxyyzz</entry>
* <entry>An opaque color; @xx, @yy, @zz are hexadecimal numbers
* specifying @r, @g, @b variants with between 1 and 4
* hexadecimal digits per component are allowed</entry>
* <entry><literallayout>#ff12ab
* #f0c</literallayout></entry>
* </row>
* <row>
* <entry>@name</entry>
* <entry>Reference to a color that has been defined with
* @define-color
* </entry>
* <entry>@bg_color</entry>
* </row>
* <row>
* <entry>mix(@color1, @color2, @f)</entry>
* <entry>A linear combination of @color1 and @color2. @f is a
* floating point number between 0 and 1.</entry>
* <entry><literallayout>mix(#ff1e0a, @bg_color, 0.8)</literallayout></entry>
* </row>
* <row>
* <entry>shade(@color, @f)</entry>
* <entry>A lighter or darker variant of @color. @f is a
* floating point number.
* </entry>
* <entry>shade(@fg_color, 0.5)</entry>
* </row>
* <row>
* <entry>lighter(@color)</entry>
* <entry>A lighter variant of @color</entry>
* </row>
* <row>
* <entry>darker(@color)</entry>
* <entry>A darker variant of @color</entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* </refsect2>
* <refsect2 id="gtkcssprovider-gradients">
* <title>Gradients</title>
* <para>
* Linear or radial Gradients can be used as background images.
* </para>
* <para>
* A linear gradient along the line from (@start_x, @start_y) to
* (@end_x, @end_y) is specified using the syntax
* <literallayout>-gtk-gradient (linear,
* @start_x @start_y, @end_x @end_y,
* color-stop (@position, @color),
* ...)</literallayout>
* where @start_x and @end_x can be either a floating point number between
* 0 and 1 or one of the special values 'left', 'right' or 'center', @start_y
* and @end_y can be either a floating point number between 0 and 1 or one
* of the special values 'top', 'bottom' or 'center', @position is a floating
* point number between 0 and 1 and @color is a color expression (see above).
* The color-stop can be repeated multiple times to add more than one color
* stop. 'from (@color)' and 'to (@color)' can be used as abbreviations for
* color stops with position 0 and 1, respectively.
* </para>
* <example>
* <title>A linear gradient</title>
* <inlinegraphic fileref="gradient1.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (linear,
* left top, right bottom,
* from(@yellow), to(@blue))</literallayout></para>
* </example>
* <example>
* <title>Another linear gradient</title>
* <inlinegraphic fileref="gradient2.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (linear,
* 0 0, 0 1,
* color-stop(0, @yellow),
* color-stop(0.2, @blue),
* color-stop(1, #0f0))</literallayout></para>
* </example>
* <para>
* A radial gradient along the two circles defined by (@start_x, @start_y,
* @start_radius) and (@end_x, @end_y, @end_radius) is specified using the
* syntax
* <literallayout>-gtk-gradient (radial,
* @start_x @start_y, @start_radius,
* @end_x @end_y, @end_radius,
* color-stop (@position, @color),
* ...)</literallayout>
* where @start_radius and @end_radius are floating point numbers and
* the other parameters are as before.
* </para>
* <example>
* <title>A radial gradient</title>
* <inlinegraphic fileref="gradient3.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (radial,
* center center, 0,
* center center, 1,
* from(@yellow), to(@green))</literallayout></para>
* </example>
* <example>
* <title>Another radial gradient</title>
* <inlinegraphic fileref="gradient4.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (radial,
* 0.4 0.4, 0.1,
* 0.6 0.6, 0.7,
* color-stop (0, #f00),
* color-stop (0.1, #a0f),
* color-stop (0.2, @yellow),
* color-stop (1, @green))</literallayout></para>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-shadows">
* <title>Text shadow</title>
* <para>
* A shadow list can be applied to text or symbolic icons, using the CSS3
* text-shadow syntax, as defined in
* <ulink url="http://www.w3.org/TR/css3-text/#text-shadow">the CSS3 specification</ulink>.
* </para>
* <para>
* A text shadow is specified using the syntax
* <literallayout>text-shadow: @horizontal_offset @vertical_offset [ @blur_radius ] @color</literallayout>
* The offset of the shadow is specified with the @horizontal_offset and @vertical_offset
* parameters. The optional blur radius is parsed, but it is currently not rendered by
* the GTK+ theming engine.
* </para>
* <para>
* To set multiple shadows on an element, you can specify a comma-separated list
* of shadow elements in the text-shadow property. Shadows are always rendered
* front-back, i.e. the first shadow specified is on top of the others. Shadows
* can thus overlay each other, but they can never overlay the text itself,
* which is always rendered on top of the shadow layer.
* </para>
* </refsect2>
* <refsect2>
* <title>Box shadow</title>
* <para>
* Themes can apply shadows on framed elements using the CSS3 box-shadow syntax,
* as defined in
* <ulink url="http://www.w3.org/TR/css3-background/#the-box-shadow">the CSS3 specification</ulink>.
* </para>
* <para>
* A box shadow is specified using the syntax
* <literallayout>box-shadow: [ @inset ] @horizontal_offset @vertical_offset [ @blur_radius ] [ @spread ] @color</literallayout>
* A positive offset will draw a shadow that is offset to the right (down) of the box,
* a negative offset to the left (top). The optional spread parameter defines an additional
* distance to expand the shadow shape in all directions, by the specified radius.
* The optional blur radius parameter is parsed, but it is currently not rendered by
* the GTK+ theming engine.
* The inset parameter defines whether the drop shadow should be rendered inside or outside
* the box canvas. Only inset box-shadows are currently supported by the GTK+ theming engine,
* non-inset elements are currently ignored.
* </para>
* <para>
* To set multiple box-shadows on an element, you can specify a comma-separated list
* of shadow elements in the box-shadow property. Shadows are always rendered
* front-back, i.e. the first shadow specified is on top of the others, so they may
* overlap other boxes or other shadows.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-border-image">
* <title>Border images</title>
* <para>
* Images and gradients can also be used in slices for the purpose of creating
* scalable borders.
* For more information, see the CSS3 documentation for the border-image property,
* which can be found <ulink url="http://www.w3.org/TR/css3-background/#border-images">here</ulink>.
* </para>
* <inlinegraphic fileref="slices.png" format="PNG"/>
* <para>
* The parameters of the slicing process are controlled by
* four separate properties. Note that you can use the
* <literallayout>border-image</literallayout> shorthand property
* to set values for the three properties at the same time.
* </para>
* <para>
* <literallayout>border-image-source: url(@path)
* (or border-image-source: -gtk-gradient(...))</literallayout>:
* Specifies the source of the border image, and it can either
* be an URL or a gradient (see above).
* </para>
* <para>
* <literallayout>border-image-slice: @top @right @bottom @left</literallayout>
* The sizes specified by the @top, @right, @bottom and @left parameters
* are the offsets, in pixels, from the relevant edge where the image
* should be "cut off" to build the slices used for the rendering
* of the border.
* </para>
* <para>
* <literallayout>border-image-width: @top @right @bottom @left</literallayout>
* The sizes specified by the @top, @right, @bottom and @left parameters
* are inward distances from the border box edge, used to specify the
* rendered size of each slice determined by border-image-slice.
* If this property is not specified, the values of border-width will
* be used as a fallback.
* </para>
* <para>
* <literallayout>border-image-repeat: [stretch|repeat|round|space] ?
* [stretch|repeat|round|space]</literallayout>
* Specifies how the image slices should be rendered in the area
* outlined by border-width.
* The default (stretch) is to resize the slice to fill in the whole
* allocated area.
* If the value of this property is 'repeat', the image slice
* will be tiled to fill the area.
* If the value of this property is 'round', the image slice will
* be tiled to fill the area, and scaled to fit it exactly
* a whole number of times.
* If the value of this property is 'space', the image slice will
* be tiled to fill the area, and if it doesn't fit it exactly a whole
* number of times, the extra space is distributed as padding around
* the slices.
* If two options are specified, the first one affects
* the horizontal behaviour and the second one the vertical behaviour.
* If only one option is specified, it affects both.
* </para>
* <example>
* <title>A border image</title>
* <inlinegraphic fileref="border1.png" format="PNG"/>
* <para>This border image was specified with
* <literallayout>url("gradient1.png") 10 10 10 10</literallayout>
* </para>
* </example>
* <example>
* <title>A repeating border image</title>
* <inlinegraphic fileref="border2.png" format="PNG"/>
* <para>This border image was specified with
* <literallayout>url("gradient1.png") 10 10 10 10 repeat</literallayout>
* </para>
* </example>
* <example>
* <title>A stretched border image</title>
* <inlinegraphic fileref="border3.png" format="PNG"/>
* <para>This border image was specified with
* <literallayout>url("gradient1.png") 10 10 10 10 stretch</literallayout>
* </para>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-transitions">
* <para>Styles can specify transitions that will be used to create a gradual
* change in the appearance when a widget state changes. The following
* syntax is used to specify transitions:
* <literallayout>@duration [s|ms] [linear|ease|ease-in|ease-out|ease-in-out] [loop]?</literallayout>
* The @duration is the amount of time that the animation will take for
* a complete cycle from start to end. If the loop option is given, the
* animation will be repated until the state changes again.
* The option after the duration determines the transition function from a
* small set of predefined functions.
* <figure><title>Linear transition</title>
* <graphic fileref="linear.png" format="PNG"/>
* </figure>
* <figure><title>Ease transition</title>
* <graphic fileref="ease.png" format="PNG"/>
* </figure>
* <figure><title>Ease-in-out transition</title>
* <graphic fileref="ease-in-out.png" format="PNG"/>
* </figure>
* <figure><title>Ease-in transition</title>
* <graphic fileref="ease-in.png" format="PNG"/>
* </figure>
* <figure><title>Ease-out transition</title>
* <graphic fileref="ease-out.png" format="PNG"/>
* </figure>
* </para>
* </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 is 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>engine-name</entry>
* <entry>#GtkThemingEngine</entry>
* <entry>engine: clearlooks;
* engine: none; /* use the default (i.e. builtin) engine) */ </entry>
* </row>
* <row>
* <entry>background-color</entry>
* <entry morerows="2">color (see above)</entry>
* <entry morerows="7">#GdkRGBA</entry>
* <entry morerows="7"><literallayout>background-color: #fff;
* color: &color1;
* background-color: shade (&color1, 0.5);
* color: mix (&color1, #f0f, 0.8);</literallayout>
* </entry>
* </row>
* <row>
* <entry>color</entry>
* </row>
* <row>
* <entry>border-top-color</entry>
* <entry morerows="4">transparent|color (see above)</entry>
* </row>
* <row>
* <entry>border-right-color</entry>
* </row>
* <row>
* <entry>border-bottom-color</entry>
* </row>
* <row>
* <entry>border-left-color</entry>
* </row>
* <row>
* <entry>border-color</entry>
* <entry>[transparent|color]{1,4}</entry>
* </row>
* <row>
* <entry>font-family</entry>
* <entry>@family [, @family]*</entry>
* <entry>#gchararray</entry>
* <entry>font-family: Sans, Arial;</entry>
* </row>
* <row>
* <entry>font-style</entry>
* <entry>[normal|oblique|italic]</entry>
* <entry>#PANGO_TYPE_STYLE</entry>
* <entry>font-style: italic;</entry>
* </row>
* <row>
* <entry>font-variant</entry>
* <entry>[normal|small-caps]</entry>
* <entry>#PANGO_TYPE_VARIANT</entry>
* <entry>font-variant: normal;</entry>
* </row>
* <row>
* <entry>font-weight</entry>
* <entry>[normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900]</entry>
* <entry>#PANGO_TYPE_WEIGHT</entry>
* <entry>font-weight: bold;</entry>
* </row>
* <row>
* <entry>font-size</entry>
* <entry>Font size in point</entry>
* <entry>#gint</entry>
* <entry>font-size: 13;</entry>
* </row>
* <row>
* <entry>font</entry>
* <entry>@family [@style] [@size]</entry>
* <entry>#PangoFontDescription</entry>
* <entry>font: Sans 15;</entry>
* </row>
* <row>
* <entry>margin-top</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-top: 0;</entry>
* </row>
* <row>
* <entry>margin-left</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-left: 1;</entry>
* </row>
* <row>
* <entry>margin-bottom</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-bottom: 2;</entry>
* </row>
* <row>
* <entry>margin-right</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-right: 4;</entry>
* </row>
* <row>
* <entry>margin</entry>
* <entry morerows="1"><literallayout>@width
* @vertical_width @horizontal_width
* @top_width @horizontal_width @bottom_width
* @top_width @right_width @bottom_width @left_width</literallayout>
* </entry>
* <entry morerows="1">#GtkBorder</entry>
* <entry morerows="1"><literallayout>margin: 5;
* margin: 5 10;
* margin: 5 10 3;
* margin: 5 10 3 5;</literallayout>
* </entry>
* </row>
* <row>
* <entry>padding-top</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-top: 5;</entry>
* </row>
* <row>
* <entry>padding-left</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-left: 5;</entry>
* </row>
* <row>
* <entry>padding-bottom</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-bottom: 5;</entry>
* </row>
* <row>
* <entry>padding-right</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-right: 5;</entry>
* </row>
* <row>
* <entry>padding</entry>
* </row>
* <row>
* <entry>background-image</entry>
* <entry><literallayout>gradient (see above) or
* url(@path)</literallayout></entry>
* <entry>#cairo_pattern_t</entry>
* <entry><literallayout>-gtk-gradient (linear,
* left top, right top,
* from (#fff), to (#000));
* -gtk-gradient (linear, 0.0 0.5, 0.5 1.0,
* from (#fff),
* color-stop (0.5, #f00),
* to (#000));
* -gtk-gradient (radial,
* center center, 0.2,
* center center, 0.8,
* color-stop (0.0, #fff),
* color-stop (1.0, #000));
* url ('background.png');</literallayout>
* </entry>
* </row>
* <row>
* <entry>border-top-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-top-width: 5;</entry>
* </row>
* <row>
* <entry>border-left-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-left-width: 5;</entry>
* </row>
* <row>
* <entry>border-bottom-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-bottom-width: 5;</entry>
* </row>
* <row>
* <entry>border-right-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-right-width: 5;</entry>
* </row>
* <row>
* <entry>border-width</entry>
* <entry morerows="1">#GtkBorder</entry>
* <entry morerows="1"><literallayout>border-width: 1;
* border-width: 1 2;
* border-width: 1 2 3;
* border-width: 1 2 3 5;</literallayout>
* </entry>
* </row>
* <row>
* <entry>border-radius</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-radius: 5;</entry>
* </row>
* <row>
* <entry>border-style</entry>
* <entry>[none|solid|inset|outset]</entry>
* <entry>#GtkBorderStyle</entry>
* <entry>border-style: solid;</entry>
* </row>
* <row>
* <entry>border-image</entry>
* <entry><literallayout>border image (see above)</literallayout></entry>
* <entry>internal use only</entry>
* <entry><literallayout>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;</literallayout>
* </entry>
* </row>
* <row>
* <entry>text-shadow</entry>
* <entry>shadow list (see above)</entry>
* <entry>#GtkTextShadow</entry>
* <entry><literallayout>text-shadow: 1 1 0 blue, -4 -4 red;</literallayout></entry>
* </row>
* <row>
* <entry>transition</entry>
* <entry>transition (see above)</entry>
* <entry>internal use only</entry>
* <entry><literallayout>transition: 150ms ease-in-out;
* transition: 1s linear loop;</literallayout>
* </entry>
* </row>
* <row>
* <entry>gtk-key-bindings</entry>
* <entry>binding set name list</entry>
* <entry>internal use only</entry>
* <entry><literallayout>gtk-bindings: binding1, binding2, ...;</literallayout>
* </entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* <para>
* GtkThemingEngines can register their own, engine-specific style properties
* with the function gtk_theming_engine_register_property(). These properties
* can be set in CSS like other properties, using a name of the form
* <literallayout>-<replaceable>namespace</replaceable>-<replaceable>name</replaceable></literallayout>, where <replaceable>namespace</replaceable> is typically
* the name of the theming engine, and <replaceable>name</replaceable> is the
* name of the property. Style properties that have been registered by widgets
* using gtk_widget_class_install_style_property() can also be set in this
* way, using the widget class name for <replaceable>namespace</replaceable>.
* </para>
* <example>
* <title>Using engine-specific style properties</title>
* <programlisting>
* * {
* engine: clearlooks;
* border-radius: 4;
* -GtkPaned-handle-size: 6;
* -clearlooks-colorize-scrollbar: false;
* }
* </programlisting>
* </example>
* </refsect2>
*/
typedef struct GtkCssRuleset GtkCssRuleset;
typedef struct _GtkCssScanner GtkCssScanner;
typedef enum ParserScope ParserScope;
typedef enum ParserSymbol ParserSymbol;
struct GtkCssRuleset
{
GtkCssSelector *selector;
GHashTable *widget_style;
GHashTable *style;
guint has_inherit :1;
};
struct _GtkCssScanner
{
GtkCssProvider *provider;
GtkCssParser *parser;
GtkCssScanner *parent;
GFile *file;
GFile *base;
GSList *state;
GSList *cur_selectors;
GHashTable *cur_properties;
};
struct _GtkCssProviderPrivate
{
GScanner *scanner;
GHashTable *symbolic_colors;
GArray *rulesets;
};
enum ParserScope {
SCOPE_SELECTOR,
SCOPE_PSEUDO_CLASS,
SCOPE_NTH_CHILD,
SCOPE_DECLARATION,
SCOPE_VALUE,
SCOPE_BINDING_SET
};
/* Extend GtkStateType, since these
* values are also used as symbols
*/
enum ParserSymbol {
/* Scope: pseudo-class */
SYMBOL_NTH_CHILD = GTK_STATE_FOCUSED + 1,
SYMBOL_FIRST_CHILD,
SYMBOL_LAST_CHILD,
SYMBOL_SORTED_CHILD,
/* Scope: nth-child */
SYMBOL_NTH_CHILD_EVEN,
SYMBOL_NTH_CHILD_ODD,
SYMBOL_NTH_CHILD_FIRST,
SYMBOL_NTH_CHILD_LAST
};
enum {
PARSING_ERROR,
LAST_SIGNAL
};
static guint css_provider_signals[LAST_SIGNAL] = { 0 };
static void gtk_css_provider_finalize (GObject *object);
static void gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface);
static gboolean
gtk_css_provider_load_internal (GtkCssProvider *css_provider,
GtkCssScanner *scanner,
GFile *file,
const char *data,
gsize length,
GError **error);
GQuark
gtk_css_provider_error_quark (void)
{
return g_quark_from_static_string ("gtk-css-provider-error-quark");
}
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_parsing_error (GtkCssProvider *provider,
const gchar *path,
guint line,
guint position,
const GError * error)
{
/* Only emit a warning when we have no error handlers. This is our
* default handlers. And in this case erroneous CSS files are a bug
* and should be fixed.
* Note that these warnings can also be triggered by a broken theme
* that people installed from some weird location on the internets.
*/
if (!g_signal_has_handler_pending (provider,
css_provider_signals[PARSING_ERROR],
0,
TRUE))
{
g_warning ("Theme parsing error: %s:%u:%u: %s", path ? path : "<unknown>", line, position, error->message);
}
}
static void
gtk_css_provider_class_init (GtkCssProviderClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
/**
* GtkCssProvider::parsing-error:
* @provider: the provider that had a parsing error
* @path: path to the parsed file or %NULL if the file cannot be
* identified or the data was not loaded from a file
* @line: line in the file or data or 0 if unknown
* @position: offset into the current line or 0 if unknown or the
* whole line is affected
* @error: The parsing error
*
* Signals that a parsing error occured. the @path, @line and @position
* describe the actual location of the error as accurately as possible.
*
* Parsing errors are never fatal, so the parsing will resume after
* the error. Errors may however cause parts of the given
* data or even all of it to not be parsed at all. So it is a useful idea
* to check that the parsing succeeds by connecting to this signal.
*
* Note that this signal may be emitted at any time as the css provider
* may opt to defer parsing parts or all of the input to a later time
* than when a loading function was called.
*/
css_provider_signals[PARSING_ERROR] =
g_signal_new (I_("parsing-error"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCssProviderClass, parsing_error),
NULL, NULL,
_gtk_marshal_VOID__STRING_UINT_UINT_BOXED,
G_TYPE_NONE, 4,
G_TYPE_STRING, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_ERROR);
object_class->finalize = gtk_css_provider_finalize;
klass->parsing_error = gtk_css_provider_parsing_error;
g_type_class_add_private (object_class, sizeof (GtkCssProviderPrivate));
}
static void
gtk_css_provider_take_error_full (GtkCssProvider *provider,
GFile *file,
guint line,
guint position,
GError *error)
{
char *filename;
if (file)
filename = g_file_get_path (file);
else
filename = NULL;
g_signal_emit (provider, css_provider_signals[PARSING_ERROR], 0,
filename, line, position, error);
g_free (filename);
g_error_free (error);
}
static void
gtk_css_ruleset_init_copy (GtkCssRuleset *new,
const GtkCssRuleset *ruleset,
GtkCssSelector *selector)
{
memcpy (new, ruleset, sizeof (GtkCssRuleset));
new->selector = selector;
if (new->widget_style)
g_hash_table_ref (new->widget_style);
if (new->style)
g_hash_table_ref (new->style);
}
static void
gtk_css_ruleset_clear (GtkCssRuleset *ruleset)
{
if (ruleset->style)
g_hash_table_unref (ruleset->style);
if (ruleset->widget_style)
g_hash_table_unref (ruleset->widget_style);
if (ruleset->selector)
_gtk_css_selector_free (ruleset->selector);
memset (ruleset, 0, sizeof (GtkCssRuleset));
}
static void
property_value_free (GValue *value)
{
if (G_IS_VALUE (value))
g_value_unset (value);
g_slice_free (GValue, value);
}
static void
gtk_css_ruleset_add_style (GtkCssRuleset *ruleset,
char *name,
GValue *value)
{
if (ruleset->widget_style == NULL)
ruleset->widget_style = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) property_value_free);
g_hash_table_insert (ruleset->widget_style, name, value);
}
static void
gtk_css_ruleset_add (GtkCssRuleset *ruleset,
const GtkStyleProperty *prop,
GValue *value)
{
if (ruleset->style == NULL)
ruleset->style = g_hash_table_new_full (g_direct_hash,
g_direct_equal,
NULL,
(GDestroyNotify) property_value_free);
if (_gtk_style_property_is_shorthand (prop))
{
GParameter *parameters;
guint i, n_parameters;
parameters = _gtk_style_property_unpack (prop, value, &n_parameters);
for (i = 0; i < n_parameters; i++)
{
const GtkStyleProperty *child;
GValue *value;
child = _gtk_style_property_lookup (parameters[i].name);
value = g_slice_dup (GValue, ¶meters[i].value);
gtk_css_ruleset_add (ruleset, child, value);
}
g_free (parameters);
property_value_free (value);
return;
}
ruleset->has_inherit |= _gtk_style_property_is_inherit (prop);
g_hash_table_insert (ruleset->style, (gpointer) prop, value);
}
static gboolean
gtk_css_ruleset_matches (GtkCssRuleset *ruleset,
GtkWidgetPath *path,
guint length)
{
return _gtk_css_selector_matches (ruleset->selector, path, length);
}
static void
gtk_css_scanner_reset (GtkCssScanner *scanner)
{
g_slist_free (scanner->state);
scanner->state = NULL;
g_slist_free_full (scanner->cur_selectors, (GDestroyNotify) _gtk_css_selector_free);
scanner->cur_selectors = NULL;
if (scanner->cur_properties)
g_hash_table_unref (scanner->cur_properties);
scanner ->cur_properties = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) property_value_free);
}
static void
gtk_css_scanner_destroy (GtkCssScanner *scanner)
{
gtk_css_scanner_reset (scanner);
g_object_unref (scanner->provider);
if (scanner->file)
g_object_unref (scanner->file);
g_object_unref (scanner->base);
g_hash_table_destroy (scanner->cur_properties);
_gtk_css_parser_free (scanner->parser);
g_slice_free (GtkCssScanner, scanner);
}
static void
gtk_css_scanner_parser_error (GtkCssParser *parser,
const GError *error,
gpointer user_data)
{
GtkCssScanner *scanner = user_data;
gtk_css_provider_take_error_full (scanner->provider,
scanner->file,
_gtk_css_parser_get_line (scanner->parser),
_gtk_css_parser_get_position (scanner->parser),
g_error_copy (error));
}
static GtkCssScanner *
gtk_css_scanner_new (GtkCssProvider *provider,
GtkCssScanner *parent,
GFile *file,
const gchar *data,
gsize length)
{
GtkCssScanner *scanner;
g_assert (data[length] == 0);
scanner = g_slice_new0 (GtkCssScanner);
g_object_ref (provider);
scanner->provider = provider;
scanner->parent = parent;
if (file)
{
scanner->file = g_object_ref (file);
scanner->base = g_file_get_parent (file);
}
else
{
char *dir = g_get_current_dir ();
scanner->base = g_file_new_for_path (dir);
g_free (dir);
}
scanner->cur_properties = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) property_value_free);
scanner->parser = _gtk_css_parser_new (data,
gtk_css_scanner_parser_error,
scanner);
return scanner;
}
static GFile *
gtk_css_scanner_get_base_url (GtkCssScanner *scanner)
{
return scanner->base;
}
static gboolean
gtk_css_scanner_would_recurse (GtkCssScanner *scanner,
GFile *file)
{
while (scanner)
{
if (scanner->file && g_file_equal (scanner->file, file))
return TRUE;
scanner = scanner->parent;
}
return FALSE;
}
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->rulesets = g_array_new (FALSE, FALSE, sizeof (GtkCssRuleset));
priv->symbolic_colors = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) gtk_symbolic_color_unref);
}
static void
css_provider_dump_symbolic_colors (GtkCssProvider *css_provider,
GtkStyleProperties *props)
{
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_properties_map_color (props, name, color);
}
}
static GtkStyleProperties *
gtk_css_provider_get_style (GtkStyleProvider *provider,
GtkWidgetPath *path)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
GtkStyleProperties *props;
guint i, l, length;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
length = gtk_widget_path_length (path);
props = gtk_style_properties_new ();
css_provider_dump_symbolic_colors (css_provider, props);
for (l = 1; l <= length; l++)
{
for (i = 0; i < priv->rulesets->len; i++)
{
GtkCssRuleset *ruleset;
GHashTableIter iter;
gpointer key, value;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
if (ruleset->style == NULL)
continue;
if (l < length && (!ruleset->has_inherit || _gtk_css_selector_get_state_flags (ruleset->selector)))
continue;
if (!gtk_css_ruleset_matches (ruleset, path, l))
continue;
g_hash_table_iter_init (&iter, ruleset->style);
while (g_hash_table_iter_next (&iter, &key, &value))
{
GtkStyleProperty *prop = key;
if (l != length && !_gtk_style_property_is_inherit (prop))
continue;
_gtk_style_properties_set_property_by_property (props,
prop,
_gtk_css_selector_get_state_flags (ruleset->selector),
value);
}
}
}
return props;
}
static void
gtk_css_provider_parser_error (GtkCssParser *parser,
const GError *error,
gpointer user_data)
{
GtkCssProvider *provider = user_data;
gtk_css_provider_take_error_full (provider,
NULL,
_gtk_css_parser_get_line (parser),
_gtk_css_parser_get_position (parser),
g_error_copy (error));
}
static gboolean
gtk_css_provider_get_style_property (GtkStyleProvider *provider,
GtkWidgetPath *path,
GtkStateFlags state,
GParamSpec *pspec,
GValue *value)
{
GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider);
GtkCssProviderPrivate *priv = css_provider->priv;
const GValue *val;
gboolean found = FALSE;
gchar *prop_name;
gint i;
prop_name = g_strdup_printf ("-%s-%s",
g_type_name (pspec->owner_type),
pspec->name);
for (i = priv->rulesets->len - 1; i >= 0; i--)
{
GtkCssRuleset *ruleset;
GtkStateFlags selector_state;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
if (ruleset->widget_style == NULL)
continue;
if (!gtk_css_ruleset_matches (ruleset, path, gtk_widget_path_length (path)))
continue;
selector_state = _gtk_css_selector_get_state_flags (ruleset->selector);
val = g_hash_table_lookup (ruleset->widget_style, prop_name);
if (val &&
(selector_state == 0 ||
selector_state == state ||
((selector_state & state) != 0 &&
(selector_state & ~(state)) == 0)))
{
GtkCssParser *parser;
parser = _gtk_css_parser_new (g_value_get_string (val),
gtk_css_provider_parser_error,
provider);
found = _gtk_style_property_parse_value (NULL,
value,
parser,
NULL);
_gtk_css_parser_free (parser);
if (found)
break;
}
}
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;
guint i;
css_provider = GTK_CSS_PROVIDER (object);
priv = css_provider->priv;
for (i = 0; i < priv->rulesets->len; i++)
gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
g_array_free (priv->rulesets, TRUE);
if (priv->symbolic_colors)
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
gtk_css_provider_take_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
GError *error)
{
gtk_css_provider_take_error_full (provider,
scanner->file,
_gtk_css_parser_get_line (scanner->parser),
_gtk_css_parser_get_position (scanner->parser),
error);
}
static void
gtk_css_provider_error_literal (GtkCssProvider *provider,
GtkCssScanner *scanner,
GQuark domain,
gint code,
const char *message)
{
gtk_css_provider_take_error (provider,
scanner,
g_error_new_literal (domain, code, message));
}
static void
gtk_css_provider_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
GQuark domain,
gint code,
const char *format,
...) G_GNUC_PRINTF (5, 6);
static void
gtk_css_provider_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
GQuark domain,
gint code,
const char *format,
...)
{
GError *error;
va_list args;
va_start (args, format);
error = g_error_new_valist (domain, code, format, args);
va_end (args);
gtk_css_provider_take_error (provider, scanner, error);
}
static void
gtk_css_provider_invalid_token (GtkCssProvider *provider,
GtkCssScanner *scanner,
const char *expected)
{
gtk_css_provider_error (provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected a valid %s", expected);
}
static void
css_provider_commit (GtkCssProvider *css_provider,
GSList *selectors,
GtkCssRuleset *ruleset)
{
GtkCssProviderPrivate *priv;
GSList *l;
priv = css_provider->priv;
if (ruleset->style == NULL && ruleset->widget_style == NULL)
{
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
return;
}
for (l = selectors; l; l = l->next)
{
GtkCssRuleset new;
gtk_css_ruleset_init_copy (&new, ruleset, l->data);
g_array_append_val (priv->rulesets, new);
}
g_slist_free (selectors);
}
static void
gtk_css_provider_reset (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
guint i;
priv = css_provider->priv;
g_hash_table_remove_all (priv->symbolic_colors);
for (i = 0; i < priv->rulesets->len; i++)
gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
g_array_set_size (priv->rulesets, 0);
}
static void
gtk_css_provider_propagate_error (GtkCssProvider *provider,
const gchar *path,
guint line,
guint position,
const GError *error,
GError **propagate_to)
{
/* don't fail for deprecations */
if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
{
g_warning ("Theme parsing error: %s:%u:%u: %s", path ? path : "<unknown>", line, position, error->message);
return;
}
/* we already set an error. And we'd like to keep the first one */
if (*propagate_to)
return;
*propagate_to = g_error_copy (error);
g_prefix_error (propagate_to, "%s:%u:%u: ", path ? path : "<unknown>", line, position);
}
static void
parse_import (GtkCssScanner *scanner)
{
GFile *file;
char *uri;
uri = _gtk_css_parser_read_uri (scanner->parser);
if (uri == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
return;
}
file = g_file_resolve_relative_path (gtk_css_scanner_get_base_url (scanner), uri);
g_free (uri);
if (gtk_css_scanner_would_recurse (scanner, file))
{
char *path = g_file_get_path (file);
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_IMPORT,
"Loading '%s' would recurse",
path);
g_free (path);
}
else
{
gtk_css_provider_load_internal (scanner->provider,
scanner,
file,
NULL, 0,
NULL);
}
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
g_object_unref (file);
gtk_css_provider_invalid_token (scanner->provider, scanner, "semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
return;
}
g_object_unref (file);
}
static void
parse_color_definition (GtkCssScanner *scanner)
{
GtkSymbolicColor *symbolic;
char *name;
name = _gtk_css_parser_try_name (scanner->parser, TRUE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Not a valid color name");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
return;
}
symbolic = _gtk_css_parser_read_symbolic_color (scanner->parser);
if (symbolic == NULL)
{
g_free (name);
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
return;
}
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
g_free (name);
gtk_symbolic_color_unref (symbolic);
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Missing semicolon at end of color definition");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
return;
}
g_hash_table_insert (scanner->provider->priv->symbolic_colors, name, symbolic);
}
static void
parse_binding_set (GtkCssScanner *scanner)
{
GtkBindingSet *binding_set;
char *name;
name = _gtk_css_parser_try_ident (scanner->parser, TRUE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected name for binding set");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
goto skip_semicolon;
}
binding_set = gtk_binding_set_find (name);
if (!binding_set)
{
binding_set = gtk_binding_set_new (name);
binding_set->parsed = TRUE;
}
g_free (name);
if (!_gtk_css_parser_try (scanner->parser, "{", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected '{' for binding set");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
goto skip_semicolon;
}
while (!_gtk_css_parser_is_eof (scanner->parser) &&
!_gtk_css_parser_begins_with (scanner->parser, '}'))
{
name = _gtk_css_parser_read_value (scanner->parser);
if (name == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
continue;
}
gtk_binding_entry_add_signal_from_string (binding_set, name);
g_free (name);
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
if (!_gtk_css_parser_begins_with (scanner->parser, '}') &&
!_gtk_css_parser_is_eof (scanner->parser))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
}
}
}
if (!_gtk_css_parser_try (scanner->parser, "}", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '}' after declarations");
if (!_gtk_css_parser_is_eof (scanner->parser))
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
}
skip_semicolon:
if (_gtk_css_parser_try (scanner->parser, ";", TRUE))
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"Nonstandard semicolon at end of binding set");
}
static void
parse_at_keyword (GtkCssScanner *scanner)
{
if (_gtk_css_parser_try (scanner->parser, "@import", TRUE))
parse_import (scanner);
else if (_gtk_css_parser_try (scanner->parser, "@define-color", TRUE))
parse_color_definition (scanner);
else if (_gtk_css_parser_try (scanner->parser, "@binding-set", TRUE))
parse_binding_set (scanner);
else
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"unknown @ rule");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
}
}
static gboolean
parse_selector_class (GtkCssScanner *scanner, GArray *classes)
{
GQuark qname;
char *name;
name = _gtk_css_parser_try_name (scanner->parser, FALSE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected a valid name for class");
return FALSE;
}
qname = g_quark_from_string (name);
g_array_append_val (classes, qname);
g_free (name);
return TRUE;
}
static gboolean
parse_selector_name (GtkCssScanner *scanner, GArray *names)
{
GQuark qname;
char *name;
name = _gtk_css_parser_try_name (scanner->parser, FALSE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected a valid name for id");
return FALSE;
}
qname = g_quark_from_string (name);
g_array_append_val (names, qname);
g_free (name);
return TRUE;
}
static gboolean
parse_selector_pseudo_class (GtkCssScanner *scanner,
GtkRegionFlags *region_to_modify,
GtkStateFlags *state_to_modify)
{
struct {
const char *name;
GtkRegionFlags region_flag;
GtkStateFlags state_flag;
} pseudo_classes[] = {
{ "first", GTK_REGION_FIRST, 0 },
{ "last", GTK_REGION_LAST, 0 },
{ "sorted", GTK_REGION_SORTED, 0 },
{ "active", 0, GTK_STATE_FLAG_ACTIVE },
{ "prelight", 0, GTK_STATE_FLAG_PRELIGHT },
{ "hover", 0, GTK_STATE_FLAG_PRELIGHT },
{ "selected", 0, GTK_STATE_FLAG_SELECTED },
{ "insensitive", 0, GTK_STATE_FLAG_INSENSITIVE },
{ "inconsistent", 0, GTK_STATE_FLAG_INCONSISTENT },
{ "focused", 0, GTK_STATE_FLAG_FOCUSED },
{ "focus", 0, GTK_STATE_FLAG_FOCUSED },
{ NULL, }
}, nth_child_classes[] = {
{ "first", GTK_REGION_FIRST, 0 },
{ "last", GTK_REGION_LAST, 0 },
{ "even", GTK_REGION_EVEN, 0 },
{ "odd", GTK_REGION_ODD, 0 },
{ NULL, }
}, *classes;
guint i;
char *name;
name = _gtk_css_parser_try_ident (scanner->parser, FALSE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Missing name of pseudo-class");
return FALSE;
}
if (_gtk_css_parser_try (scanner->parser, "(", TRUE))
{
char *function = name;
name = _gtk_css_parser_try_ident (scanner->parser, TRUE);
if (!_gtk_css_parser_try (scanner->parser, ")", FALSE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Missing closing bracket for pseudo-class");
return FALSE;
}
if (g_ascii_strcasecmp (function, "nth-child") != 0)
{
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_UNKNOWN_VALUE,
"Unknown pseudo-class '%s(%s)'", function, name ? name : "");
g_free (function);
g_free (name);
return FALSE;
}
g_free (function);
if (name == NULL)
{
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_UNKNOWN_VALUE,
"nth-child() requires an argument");
return FALSE;
}
classes = nth_child_classes;
}
else
classes = pseudo_classes;
for (i = 0; classes[i].name != NULL; i++)
{
if (g_ascii_strcasecmp (name, classes[i].name) == 0)
{
if ((*region_to_modify & classes[i].region_flag) ||
(*state_to_modify & classes[i].state_flag))
{
if (classes == nth_child_classes)
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Duplicate pseudo-class 'nth-child(%s)'", name);
else
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Duplicate pseudo-class '%s'", name);
}
*region_to_modify |= classes[i].region_flag;
*state_to_modify |= classes[i].state_flag;
g_free (name);
return TRUE;
}
}
if (classes == nth_child_classes)
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_UNKNOWN_VALUE,
"Unknown pseudo-class 'nth-child(%s)'", name);
else
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_UNKNOWN_VALUE,
"Unknown pseudo-class '%s'", name);
g_free (name);
return FALSE;
}
static gboolean
parse_simple_selector (GtkCssScanner *scanner,
char **name,
GArray *ids,
GArray *classes,
GtkRegionFlags *pseudo_classes,
GtkStateFlags *state)
{
gboolean parsed_something;
*name = _gtk_css_parser_try_ident (scanner->parser, FALSE);
if (*name)
parsed_something = TRUE;
else
parsed_something = _gtk_css_parser_try (scanner->parser, "*", FALSE);
do {
if (_gtk_css_parser_try (scanner->parser, "#", FALSE))
{
if (!parse_selector_name (scanner, ids))
return FALSE;
}
else if (_gtk_css_parser_try (scanner->parser, ".", FALSE))
{
if (!parse_selector_class (scanner, classes))
return FALSE;
}
else if (_gtk_css_parser_try (scanner->parser, ":", FALSE))
{
if (!parse_selector_pseudo_class (scanner, pseudo_classes, state))
return FALSE;
}
else if (!parsed_something)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected a valid selector");
return FALSE;
}
else
break;
parsed_something = TRUE;
}
while (!_gtk_css_parser_is_eof (scanner->parser));
_gtk_css_parser_skip_whitespace (scanner->parser);
return TRUE;
}
static GtkCssSelector *
parse_selector (GtkCssScanner *scanner)
{
GtkCssSelector *selector = NULL;
do {
char *name = NULL;
GArray *ids = g_array_new (TRUE, FALSE, sizeof (GQuark));
GArray *classes = g_array_new (TRUE, FALSE, sizeof (GQuark));
GtkRegionFlags pseudo_classes = 0;
GtkStateFlags state = 0;
GtkCssCombinator combine = GTK_CSS_COMBINE_DESCANDANT;
if (selector)
{
if (_gtk_css_parser_try (scanner->parser, ">", TRUE))
combine = GTK_CSS_COMBINE_CHILD;
}
if (!parse_simple_selector (scanner, &name, ids, classes, &pseudo_classes, &state))
{
g_array_free (ids, TRUE);
g_array_free (classes, TRUE);
if (selector)
_gtk_css_selector_free (selector);
return NULL;
}
selector = _gtk_css_selector_new (selector,
combine,
name,
(GQuark *) g_array_free (ids, ids->len == 0),
(GQuark *) g_array_free (classes, classes->len == 0),
pseudo_classes,
state);
g_free (name);
}
while (!_gtk_css_parser_is_eof (scanner->parser) &&
!_gtk_css_parser_begins_with (scanner->parser, ',') &&
!_gtk_css_parser_begins_with (scanner->parser, '{'));
return selector;
}
static GSList *
parse_selector_list (GtkCssScanner *scanner)
{
GSList *selectors = NULL;
do {
GtkCssSelector *select = parse_selector (scanner);
if (select == NULL)
{
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
return NULL;
}
selectors = g_slist_prepend (selectors, select);
}
while (_gtk_css_parser_try (scanner->parser, ",", TRUE));
return selectors;
}
static void
parse_declaration (GtkCssScanner *scanner,
GtkCssRuleset *ruleset)
{
const GtkStyleProperty *property;
char *name;
name = _gtk_css_parser_try_ident (scanner->parser, TRUE);
if (name == NULL)
goto check_for_semicolon;
property = _gtk_style_property_lookup (name);
if (property == NULL && name[0] != '-')
{
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_NAME,
"'%s' is not a valid property name",
name);
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_free (name);
return;
}
if (!_gtk_css_parser_try (scanner->parser, ":", TRUE))
{
gtk_css_provider_invalid_token (scanner->provider, scanner, "':'");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_free (name);
return;
}
if (property)
{
GValue *val;
g_free (name);
val = g_slice_new0 (GValue);
g_value_init (val, property->pspec->value_type);
if (_gtk_style_property_parse_value (property,
val,
scanner->parser,
gtk_css_scanner_get_base_url (scanner)))
{
if (_gtk_css_parser_begins_with (scanner->parser, ';') ||
_gtk_css_parser_begins_with (scanner->parser, '}') ||
_gtk_css_parser_is_eof (scanner->parser))
{
gtk_css_ruleset_add (ruleset, property, val);
}
else
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Junk at end of value");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_value_unset (val);
g_slice_free (GValue, val);
return;
}
}
else
{
g_value_unset (val);
g_slice_free (GValue, val);
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
return;
}
}
else if (name[0] == '-')
{
char *value_str;
value_str = _gtk_css_parser_read_value (scanner->parser);
if (value_str)
{
GValue *val;
val = g_slice_new0 (GValue);
g_value_init (val, G_TYPE_STRING);
g_value_take_string (val, value_str);
gtk_css_ruleset_add_style (ruleset, name, val);
}
else
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
return;
}
}
else
g_free (name);
check_for_semicolon:
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
if (!_gtk_css_parser_begins_with (scanner->parser, '}') &&
!_gtk_css_parser_is_eof (scanner->parser))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
}
}
}
static void
parse_declarations (GtkCssScanner *scanner,
GtkCssRuleset *ruleset)
{
while (!_gtk_css_parser_is_eof (scanner->parser) &&
!_gtk_css_parser_begins_with (scanner->parser, '}'))
{
parse_declaration (scanner, ruleset);
}
}
static void
parse_ruleset (GtkCssScanner *scanner)
{
GSList *selectors;
GtkCssRuleset ruleset = { 0, };
selectors = parse_selector_list (scanner);
if (selectors == NULL)
return;
if (!_gtk_css_parser_try (scanner->parser, "{", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '{' after selectors");
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
return;
}
parse_declarations (scanner, &ruleset);
if (!_gtk_css_parser_try (scanner->parser, "}", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '}' after declarations");
if (!_gtk_css_parser_is_eof (scanner->parser))
{
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
gtk_css_ruleset_clear (&ruleset);
return;
}
}
css_provider_commit (scanner->provider, selectors, &ruleset);
gtk_css_ruleset_clear (&ruleset);
}
static void
parse_statement (GtkCssScanner *scanner)
{
if (_gtk_css_parser_begins_with (scanner->parser, '@'))
parse_at_keyword (scanner);
else
parse_ruleset (scanner);
}
static void
parse_stylesheet (GtkCssScanner *scanner)
{
_gtk_css_parser_skip_whitespace (scanner->parser);
while (!_gtk_css_parser_is_eof (scanner->parser))
{
if (_gtk_css_parser_try (scanner->parser, "<!--", TRUE) ||
_gtk_css_parser_try (scanner->parser, "-->", TRUE))
continue;
parse_statement (scanner);
}
}
static int
gtk_css_provider_compare_rule (gconstpointer a_,
gconstpointer b_)
{
const GtkCssRuleset *a = (const GtkCssRuleset *) a_;
const GtkCssRuleset *b = (const GtkCssRuleset *) b_;
int compare;
compare = _gtk_css_selector_compare (a->selector, b->selector);
if (compare != 0)
return compare;
/* compare pointers in array to ensure a stable sort */
if (a_ < b_)
return -1;
if (a_ > b_)
return 1;
return 0;
}
static void
gtk_css_provider_postprocess (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv = css_provider->priv;
g_array_sort (priv->rulesets, gtk_css_provider_compare_rule);
}
static gboolean
gtk_css_provider_load_internal (GtkCssProvider *css_provider,
GtkCssScanner *parent,
GFile *file,
const char *data,
gsize length,
GError **error)
{
GtkCssScanner *scanner;
gulong error_handler;
char *free_data = NULL;
if (error)
error_handler = g_signal_connect (css_provider,
"parsing-error",
G_CALLBACK (gtk_css_provider_propagate_error),
error);
else
error_handler = 0; /* silence gcc */
if (data == NULL)
{
GError *load_error = NULL;
if (g_file_load_contents (file, NULL,
&free_data, &length,
NULL, &load_error))
{
data = free_data;
}
else
{
if (parent)
{
gtk_css_provider_error (css_provider,
parent,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_IMPORT,
"Failed to import: %s",
load_error->message);
g_error_free (load_error);
}
else
{
gtk_css_provider_take_error_full (css_provider,
file,
0, 0,
load_error);
}
}
}
if (data)
{
scanner = gtk_css_scanner_new (css_provider, parent, file, data, length);
parse_stylesheet (scanner);
gtk_css_scanner_destroy (scanner);
if (parent == NULL)
gtk_css_provider_postprocess (css_provider);
}
g_free (free_data);
if (error)
{
g_signal_handler_disconnect (css_provider, error_handler);
if (*error)
{
/* We clear all contents from the provider for backwards compat reasons */
gtk_css_provider_reset (css_provider);
return FALSE;
}
}
return TRUE;
}
/**
* gtk_css_provider_load_from_data:
* @css_provider: a #GtkCssProvider
* @data: (array length=length) (element-type guint8): 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)
{
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (data != NULL, FALSE);
if (length < 0)
length = strlen (data);
gtk_css_provider_reset (css_provider);
return gtk_css_provider_load_internal (css_provider, NULL, NULL, data, length, error);
}
/**
* 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)
{
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (G_IS_FILE (file), FALSE);
gtk_css_provider_reset (css_provider);
return gtk_css_provider_load_internal (css_provider, NULL, file, NULL, 0, error);
}
/**
* 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)
{
GFile *file;
gboolean result;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (path != NULL, FALSE);
file = g_file_new_for_path (path);
result = gtk_css_provider_load_from_file (css_provider, file, error);
g_object_unref (file);
return result;
}
/**
* 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"
"@define-color placeholder_text_color #808080; \n"
"\n"
"@define-color info_fg_color rgb (181, 171, 156);\n"
"@define-color info_bg_color rgb (252, 252, 189);\n"
"@define-color warning_fg_color rgb (173, 120, 41);\n"
"@define-color warning_bg_color rgb (250, 173, 61);\n"
"@define-color question_fg_color rgb (97, 122, 214);\n"
"@define-color question_bg_color rgb (138, 173, 212);\n"
"@define-color error_fg_color rgb (166, 38, 38);\n"
"@define-color error_bg_color rgb (237, 54, 54);\n"
"\n"
"* {\n"
" background-color: @bg_color;\n"
" color: @fg_color;\n"
" border-color: shade (@bg_color, 0.6);\n"
" padding: 2;\n"
" border-width: 0;\n"
"}\n"
"\n"
"*:prelight {\n"
" background-color: shade (@bg_color, 1.05);\n"
" color: shade (@fg_color, 1.3);\n"
"}\n"
"\n"
"*:selected {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
".expander, GtkTreeView.view.expander {\n"
" color: #fff;\n"
"}\n"
"\n"
".expander:prelight,\n"
"GtkTreeView.view.expander:selected:prelight {\n"
" color: @text_color;\n"
"}\n"
"\n"
".expander:active {\n"
" transition: 200ms linear;\n"
"}\n"
"\n"
"*:insensitive {\n"
" border-color: shade (@bg_color, 0.7);\n"
" background-color: shade (@bg_color, 0.9);\n"
" color: shade (@bg_color, 0.7);\n"
"}\n"
"\n"
".view {\n"
" border-width: 0;\n"
" border-radius: 0;\n"
" background-color: @base_color;\n"
" color: @text_color;\n"
"}\n"
".view:selected {\n"
" background-color: shade (@bg_color, 0.9);\n"
" color: @fg_color;\n"
"}\n"
"\n"
".view:selected:focused {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
".view column:sorted row,\n"
".view column:sorted row:prelight {\n"
" background-color: shade (@bg_color, 0.85);\n"
"}\n"
"\n"
".view column:sorted row:nth-child(odd),\n"
".view column:sorted row:nth-child(odd):prelight {\n"
" background-color: shade (@bg_color, 0.8);\n"
"}\n"
"\n"
".view row,\n"
".view row:prelight {\n"
" background-color: @base_color;\n"
" color: @text_color;\n"
"}\n"
"\n"
".view row:nth-child(odd),\n"
".view row:nth-child(odd):prelight {\n"
" background-color: shade (@base_color, 0.93); \n"
"}\n"
"\n"
".view row:selected:focused {\n"
" background-color: @selected_bg_color;\n"
"}\n"
"\n"
".view row:selected {\n"
" background-color: darker (@bg_color);\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
".view.cell.trough,\n"
".view.cell.trough:hover,\n"
".view.cell.trough:selected,\n"
".view.cell.trough:selected:focused {\n"
" background-color: @bg_color;\n"
" color: @fg_color;\n"
"}\n"
"\n"
".view.cell.progressbar,\n"
".view.cell.progressbar:hover,\n"
".view.cell.progressbar:selected,\n"
".view.cell.progressbar:selected:focused {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
".rubberband {\n"
" background-color: alpha (@fg_color, 0.25);\n"
" border-color: @fg_color;\n"
" border-style: solid;\n"
" border-width: 1;\n"
"}\n"
"\n"
".tooltip,\n"
".tooltip * {\n"
" background-color: @tooltip_bg_color; \n"
" color: @tooltip_fg_color; \n"
" border-color: @tooltip_fg_color; \n"
" border-width: 1;\n"
" border-style: solid;\n"
"}\n"
"\n"
".button,\n"
".slider {\n"
" border-style: outset; \n"
" border-width: 2; \n"
"}\n"
"\n"
".button:active {\n"
" background-color: shade (@bg_color, 0.7);\n"
" border-style: inset; \n"
"}\n"
"\n"
".button:prelight,\n"
".slider:prelight {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
" border-color: shade (@selected_bg_color, 0.7);\n"
"}\n"
"\n"
".trough {\n"
" background-color: darker (@bg_color);\n"
" border-style: inset;\n"
" border-width: 1;\n"
" padding: 0;\n"
"}\n"
"\n"
".entry {\n"
" border-style: inset;\n"
" border-width: 2;\n"
" background-color: @base_color;\n"
" color: @text_color;\n"
"}\n"
"\n"
".entry:insensitive {\n"
" background-color: shade (@base_color, 0.9);\n"
" color: shade (@base_color, 0.7);\n"
"}\n"
".entry:active {\n"
" background-color: #c4c2bd;\n"
" color: #000;\n"
"}\n"
"\n"
".progressbar,\n"
".entry.progressbar, \n"
".cell.progressbar {\n"
" background-color: @selected_bg_color;\n"
" border-color: shade (@selected_bg_color, 0.7);\n"
" color: @selected_fg_color;\n"
" border-style: outset;\n"
" border-width: 1;\n"
"}\n"
"\n"
"GtkCheckButton:hover,\n"
"GtkCheckButton:selected,\n"
"GtkRadioButton:hover,\n"
"GtkRadioButton:selected {\n"
" background-color: shade (@bg_color, 1.05);\n"
"}\n"
"\n"
".check, .radio,"
".cell.check, .cell.radio,\n"
".cell.check:hover, .cell.radio:hover {\n"
" border-style: solid;\n"
" border-width: 1;\n"
" background-color: @base_color;\n"
" border-color: @fg_color;\n"
"}\n"
"\n"
".check:active, .radio:active,\n"
".check:hover, .radio:hover {\n"
" background-color: @base_color;\n"
" border-color: @fg_color;\n"
" color: @text_color;\n"
"}\n"
"\n"
".check:selected, .radio:selected {\n"
" background-color: darker (@bg_color);\n"
" color: @selected_fg_color;\n"
" border-color: @selected_fg_color;\n"
"}\n"
"\n"
".check:selected:focused, .radio:selected:focused {\n"
" background-color: @selected_bg_color;\n"
"}\n"
"\n"
".menuitem.check, .menuitem.radio {\n"
" color: @fg_color;\n"
" border-style: none;\n"
" border-width: 0;\n"
"}\n"
"\n"
".popup {\n"
" border-style: outset;\n"
" border-width: 1;\n"
"}\n"
"\n"
".viewport {\n"
" border-style: inset;\n"
" border-width: 2;\n"
"}\n"
"\n"
".notebook {\n"
" border-style: outset;\n"
" border-width: 1;\n"
"}\n"
"\n"
".frame {\n"
" border-style: inset;\n"
" border-width: 1;\n"
"}\n"
"\n"
"GtkScrolledWindow.frame {\n"
" padding: 0;\n"
"}\n"
"\n"
".menu,\n"
".menubar,\n"
".toolbar {\n"
" border-style: outset;\n"
" border-width: 1;\n"
"}\n"
"\n"
".menu:hover,\n"
".menubar:hover,\n"
".menuitem:hover,\n"
".menuitem.check:hover,\n"
".menuitem.radio:hover {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
"GtkSpinButton.button {\n"
" border-width: 1;\n"
"}\n"
"\n"
".scale.slider:hover,\n"
"GtkSpinButton.button:hover {\n"
" background-color: shade (@bg_color, 1.05);\n"
" border-color: shade (@bg_color, 0.8);\n"
"}\n"
"\n"
"GtkSwitch.trough:active {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
"GtkToggleButton.button:inconsistent {\n"
" border-style: outset;\n"
" border-width: 1px;\n"
" background-color: shade (@bg_color, 0.9);\n"
" border-color: shade (@bg_color, 0.7);\n"
"}\n"
"\n"
"GtkLabel:selected {\n"
" background-color: shade (@bg_color, 0.9);\n"
"}\n"
"\n"
"GtkLabel:selected:focused {\n"
" background-color: @selected_bg_color;\n"
"}\n"
"\n"
".spinner:active {\n"
" transition: 750ms linear loop;\n"
"}\n"
"\n"
".info {\n"
" background-color: @info_bg_color;\n"
" color: @info_fg_color;\n"
"}\n"
"\n"
".warning {\n"
" background-color: @warning_bg_color;\n"
" color: @warning_fg_color;\n"
"}\n"
"\n"
".question {\n"
" background-color: @question_bg_color;\n"
" color: @question_fg_color;\n"
"}\n"
"\n"
".error {\n"
" background-color: @error_bg_color;\n"
" color: @error_fg_color;\n"
"}\n"
"\n"
".highlight {\n"
" background-color: @selected_bg_color;\n"
" color: @selected_fg_color;\n"
"}\n"
"\n"
".light-area-focus {\n"
" color: #000;\n"
"}\n"
"\n"
".dark-area-focus {\n"
" color: #fff;\n"
"}\n"
"GtkCalendar.view {\n"
" border-width: 1;\n"
" border-style: inset;\n"
" padding: 1;\n"
"}\n"
"\n"
"GtkCalendar.view:inconsistent {\n"
" color: darker (@bg_color);\n"
"}\n"
"\n"
"GtkCalendar.header {\n"
" background-color: @bg_color;\n"
" border-style: outset;\n"
" border-width: 2;\n"
"}\n"
"\n"
"GtkCalendar.highlight {\n"
" border-width: 0;\n"
"}\n"
"\n"
"GtkCalendar.button {\n"
" background-color: @bg_color;\n"
"}\n"
"\n"
"GtkCalendar.button:hover {\n"
" background-color: lighter (@bg_color);\n"
" color: @fg_color;\n"
"}\n"
"\n"
".menu * {\n"
" border-width: 0;\n"
" padding: 2;\n"
"}\n"
"\n";
provider = gtk_css_provider_new ();
if (!gtk_css_provider_load_from_data (provider, str, -1, NULL))
{
g_error ("Failed to load the internal default CSS.");
}
}
return provider;
}
gchar *
_gtk_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: (allow-none): variant to load, for example, "dark", or
* %NULL for the default
*
* Loads a theme from the usual theme paths
*
* Returns: (transfer none): a #GtkCssProvider with the theme loaded.
* 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;
gchar *key;
if (G_UNLIKELY (!themes))
themes = g_hash_table_new (g_str_hash, g_str_equal);
if (variant == NULL)
key = (gchar *)name;
else
key = g_strconcat (name, "-", variant, NULL);
provider = g_hash_table_lookup (themes, key);
if (!provider)
{
const gchar *home_dir;
gchar *subpath, *path = NULL;
if (variant)
subpath = g_strdup_printf ("gtk-3.0" G_DIR_SEPARATOR_S "gtk-%s.css", variant);
else
subpath = g_strdup ("gtk-3.0" G_DIR_SEPARATOR_S "gtk.css");
/* 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;
theme_dir = _gtk_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;
}
}
g_free (subpath);
if (path)
{
provider = gtk_css_provider_new ();
if (!gtk_css_provider_load_from_path (provider, path, NULL))
{
g_object_unref (provider);
provider = NULL;
}
else
g_hash_table_insert (themes, g_strdup (key), provider);
g_free (path);
}
}
if (key != name)
g_free (key);
return provider;
}
static int
compare_properties (gconstpointer a, gconstpointer b)
{
return strcmp (((const GtkStyleProperty *) a)->pspec->name,
((const GtkStyleProperty *) b)->pspec->name);
}
static void
gtk_css_ruleset_print (const GtkCssRuleset *ruleset,
GString *str)
{
GList *keys, *walk;
_gtk_css_selector_print (ruleset->selector, str);
g_string_append (str, " {\n");
if (ruleset->style)
{
keys = g_hash_table_get_keys (ruleset->style);
/* so the output is identical for identical selector styles */
keys = g_list_sort (keys, compare_properties);
for (walk = keys; walk; walk = walk->next)
{
GtkStyleProperty *prop = walk->data;
const GValue *value = g_hash_table_lookup (ruleset->style, prop);
g_string_append (str, " ");
g_string_append (str, prop->pspec->name);
g_string_append (str, ": ");
_gtk_style_property_print_value (prop, value, str);
g_string_append (str, ";\n");
}
g_list_free (keys);
}
if (ruleset->widget_style)
{
keys = g_hash_table_get_keys (ruleset->widget_style);
/* so the output is identical for identical selector styles */
keys = g_list_sort (keys, (GCompareFunc) strcmp);
for (walk = keys; walk; walk = walk->next)
{
const char *name = walk->data;
const GValue *value = g_hash_table_lookup (ruleset->widget_style, (gpointer) name);
g_string_append (str, " ");
g_string_append (str, name);
g_string_append (str, ": ");
g_string_append (str, g_value_get_string (value));
g_string_append (str, ";\n");
}
g_list_free (keys);
}
g_string_append (str, "}\n");
}
static void
gtk_css_provider_print_colors (GHashTable *colors,
GString *str)
{
GList *keys, *walk;
char *s;
keys = g_hash_table_get_keys (colors);
/* so the output is identical for identical styles */
keys = g_list_sort (keys, (GCompareFunc) strcmp);
for (walk = keys; walk; walk = walk->next)
{
const char *name = walk->data;
GtkSymbolicColor *symbolic = g_hash_table_lookup (colors, (gpointer) name);
g_string_append (str, "@define-color ");
g_string_append (str, name);
g_string_append (str, " ");
s = gtk_symbolic_color_to_string (symbolic);
g_string_append (str, s);
g_free (s);
g_string_append (str, ";\n");
}
g_list_free (keys);
}
/**
* gtk_css_provider_to_string:
* @provider: the provider to write to a string
*
* Convertes the @provider into a string representation in CSS
* format.
*
* Using gtk_css_provider_load_from_data() with the return value
* from this function on a new provider created with
* gtk_css_provider_new() will basicallu create a duplicate of
* this @provider.
*
* Returns: a new string representing the @provider.
**/
char *
gtk_css_provider_to_string (GtkCssProvider *provider)
{
GtkCssProviderPrivate *priv;
GString *str;
guint i;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (provider), NULL);
priv = provider->priv;
str = g_string_new ("");
gtk_css_provider_print_colors (priv->symbolic_colors, str);
for (i = 0; i < priv->rulesets->len; i++)
{
if (i > 0)
g_string_append (str, "\n");
gtk_css_ruleset_print (&g_array_index (priv->rulesets, GtkCssRuleset, i), str);
}
return g_string_free (str, FALSE);
}