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gtk2/gtk/gtkcssprovider.c
Alexander Larsson d69c6fff7a css: Don't keep around linear selectors 
Now we use the selector tree everywhere, so there is no need to
keep around the linear selectors unless we're using them to
verify the tree correctness, so free them.
2012-11-30 14:53:30 +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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <cairo-gobject.h>
#include "gtkcssproviderprivate.h"
#include "gtkbitmaskprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkcsskeyframesprivate.h"
#include "gtkcssparserprivate.h"
#include "gtkcsssectionprivate.h"
#include "gtkcssselectorprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstylefuncsprivate.h"
#include "gtkstyleprovider.h"
#include "gtkstylecontextprivate.h"
#include "gtkstylepropertiesprivate.h"
#include "gtkstylepropertyprivate.h"
#include "gtkstyleproviderprivate.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: &num;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
* '&num;' 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&num;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">
* /&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 {
* color: @fg_color;
* background-color: &num;1209a2
* }
*
* /&ast; Theme any widget within a GtkBin &ast;/
* GtkBin * {
* font: Sans 20
* }
*
* /&ast; Theme a label named title-label &ast;/
* GtkLabel&num;title-label {
* font: Sans 15
* }
*
* /&ast; Theme any widget named main-entry &ast;/
* &num;main-entry {
* background-color: &num;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">
* /&ast; Theme all widgets defining the class entry &ast;/
* .entry {
* color: &num;39f1f9;
* }
*
* /&ast; Theme spinbuttons' entry &ast;/
* GtkSpinButton.entry {
* color: &num;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">
* /&ast; Theme any label within a notebook &ast;/
* GtkNotebook GtkLabel {
* color: &num;f90192;
* }
*
* /&ast; Theme labels within notebook tabs &ast;/
* GtkNotebook tab GtkLabel {
* 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 {
* color: &num;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">
* /&ast; Theme active (pressed) buttons &ast;/
* GtkButton:active {
* background-color: &num;0274d9;
* }
*
* /&ast; Theme buttons with the mouse pointer on it,
* both are equivalent &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>
* 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>&commat; Rules</title>
* <para>
* GTK+'s CSS supports the &commat;import rule, in order to load another
* CSS style sheet in addition to the currently parsed one.
* </para>
* <example>
* <title>Using the &commat;import rule</title>
* <programlisting language="text">
* &commat;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 &commat;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 &commat;binding rule</title>
* <programlisting language="text">
* &commat;binding-set binding-set1 {
* bind "&lt;alt&gt;Left" { "move-cursor" (visual-positions, -3, 0) };
* unbind "End";
* };
*
* &commat;binding-set binding-set2 {
* bind "&lt;alt&gt;Right" { "move-cursor" (visual-positions, 3, 0) };
* bind "&lt;alt&gt;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 &commat;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">
* &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 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">
* &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>
* <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>&num;@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>&num;ff12ab
* &num;f0c</literallayout></entry>
* </row>
* <row>
* <entry>&commat;name</entry>
* <entry>Reference to a color that has been defined with
* &commat;define-color
* </entry>
* <entry>&commat;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(&num;ff1e0a, &commat;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(&commat;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>
* <row>
* <entry>alpha(@color, @f)</entry>
* <entry>Modifies passed color's alpha by a factor @f. @f is a
* floating point number. @f < 1.0 results in a more transparent
* color while @f > 1.0 results in a more opaque color.
* </entry>
* <entry>alhpa(blue, 0.5)</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(&commat;yellow), to(&commat;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, &commat;yellow),
* color-stop(0.2, &commat;blue),
* color-stop(1, &num;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(&commat;yellow), to(&commat;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, &num;f00),
* color-stop (0.1, &num;a0f),
* color-stop (0.2, &commat;yellow),
* color-stop (1, &commat;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>
* 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; /&ast; use the default (i.e. builtin) engine) &ast;/ </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: &num;fff;
* color: &amp;color1;
* background-color: shade (&amp;color1, 0.5);
* color: mix (&amp;color1, &num;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 (&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));
* url ('background.png');</literallayout>
* </entry>
* </row>
* <row>
* <entry>background-repeat</entry>
* <entry>[repeat|no-repeat]</entry>
* <entry>internal</entry>
* <entry><literallayout>background-repeat: no-repeat;</literallayout>
* If not specified, the style doesn't respect the CSS3
* specification, since the background will be
* stretched to fill the area.
* </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>internal use only</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 struct _PropertyValue PropertyValue;
typedef struct _WidgetPropertyValue WidgetPropertyValue;
typedef enum ParserScope ParserScope;
typedef enum ParserSymbol ParserSymbol;
struct _PropertyValue {
GtkCssStyleProperty *property;
GtkCssValue *value;
GtkCssSection *section;
};
struct _WidgetPropertyValue {
WidgetPropertyValue *next;
char *name;
char *value;
GtkCssSection *section;
};
struct GtkCssRuleset
{
GtkCssSelector *selector;
GtkCssSelectorTree *selector_match;
WidgetPropertyValue *widget_style;
PropertyValue *styles;
GtkBitmask *set_styles;
guint n_styles;
guint owns_styles : 1;
guint owns_widget_style : 1;
};
struct _GtkCssScanner
{
GtkCssProvider *provider;
GtkCssParser *parser;
GtkCssSection *section;
GtkCssScanner *parent;
GSList *state;
};
struct _GtkCssProviderPrivate
{
GScanner *scanner;
GHashTable *symbolic_colors;
GHashTable *keyframes;
GArray *rulesets;
GtkCssSelectorTree *tree;
GResource *resource;
};
enum {
PARSING_ERROR,
LAST_SIGNAL
};
static gboolean gtk_keep_css_sections = FALSE;
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 void gtk_css_style_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface);
static void widget_property_value_list_free (WidgetPropertyValue *head);
static gboolean
gtk_css_provider_load_internal (GtkCssProvider *css_provider,
GtkCssScanner *scanner,
GFile *file,
const char *data,
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)
G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER_PRIVATE,
gtk_css_style_provider_private_iface_init));
static void
gtk_css_provider_parsing_error (GtkCssProvider *provider,
GtkCssSection *section,
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))
{
char *s = _gtk_css_section_to_string (section);
g_warning ("Theme parsing error: %s: %s",
s,
error->message);
g_free (s);
}
}
static void
gtk_css_provider_class_init (GtkCssProviderClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
if (g_getenv ("GTK_CSS_DEBUG"))
gtk_keep_css_sections = TRUE;
/**
* GtkCssProvider::parsing-error:
* @provider: the provider that had a parsing error
* @section: section the error happened in
* @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__BOXED_BOXED,
G_TYPE_NONE, 2, GTK_TYPE_CSS_SECTION, 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_ruleset_init_copy (GtkCssRuleset *new,
GtkCssRuleset *ruleset,
GtkCssSelector *selector)
{
memcpy (new, ruleset, sizeof (GtkCssRuleset));
new->selector = selector;
/* First copy takes over ownership */
if (ruleset->owns_styles)
ruleset->owns_styles = FALSE;
if (ruleset->owns_widget_style)
ruleset->owns_widget_style = FALSE;
if (new->set_styles)
new->set_styles = _gtk_bitmask_copy (new->set_styles);
}
static void
gtk_css_ruleset_clear (GtkCssRuleset *ruleset)
{
if (ruleset->owns_styles)
{
guint i;
for (i = 0; i < ruleset->n_styles; i++)
{
_gtk_css_value_unref (ruleset->styles[i].value);
ruleset->styles[i].value = NULL;
if (ruleset->styles[i].section)
gtk_css_section_unref (ruleset->styles[i].section);
}
g_free (ruleset->styles);
}
if (ruleset->set_styles)
_gtk_bitmask_free (ruleset->set_styles);
if (ruleset->owns_widget_style)
widget_property_value_list_free (ruleset->widget_style);
if (ruleset->selector)
_gtk_css_selector_free (ruleset->selector);
memset (ruleset, 0, sizeof (GtkCssRuleset));
}
static WidgetPropertyValue *
widget_property_value_new (char *name, GtkCssSection *section)
{
WidgetPropertyValue *value;
value = g_slice_new0 (WidgetPropertyValue);
value->name = name;
if (gtk_keep_css_sections)
value->section = gtk_css_section_ref (section);
return value;
}
static void
widget_property_value_free (WidgetPropertyValue *value)
{
g_free (value->value);
g_free (value->name);
if (value->section)
gtk_css_section_unref (value->section);
g_slice_free (WidgetPropertyValue, value);
}
static void
widget_property_value_list_free (WidgetPropertyValue *head)
{
WidgetPropertyValue *l, *next;
for (l = head; l != NULL; l = next)
{
next = l->next;
widget_property_value_free (l);
}
}
static WidgetPropertyValue *
widget_property_value_list_remove_name (WidgetPropertyValue *head, const char *name)
{
WidgetPropertyValue *l, **last;
last = &head;
for (l = head; l != NULL; l = l->next)
{
if (strcmp (l->name, name) == 0)
{
*last = l->next;
widget_property_value_free (l);
break;
}
last = &l->next;
}
return head;
}
static void
gtk_css_ruleset_add_style (GtkCssRuleset *ruleset,
char *name,
WidgetPropertyValue *value)
{
value->next = widget_property_value_list_remove_name (ruleset->widget_style, name);
ruleset->widget_style = value;
ruleset->owns_widget_style = TRUE;
}
static void
gtk_css_ruleset_add (GtkCssRuleset *ruleset,
GtkCssStyleProperty *property,
GtkCssValue *value,
GtkCssSection *section)
{
guint i;
g_return_if_fail (ruleset->owns_styles || ruleset->n_styles == 0);
if (ruleset->set_styles == NULL)
ruleset->set_styles = _gtk_bitmask_new ();
ruleset->set_styles = _gtk_bitmask_set (ruleset->set_styles,
_gtk_css_style_property_get_id (property),
TRUE);
ruleset->owns_styles = TRUE;
for (i = 0; i < ruleset->n_styles; i++)
{
if (ruleset->styles[i].property == property)
{
_gtk_css_value_unref (ruleset->styles[i].value);
ruleset->styles[i].value = NULL;
if (ruleset->styles[i].section)
gtk_css_section_unref (ruleset->styles[i].section);
break;
}
}
if (i == ruleset->n_styles)
{
ruleset->n_styles++;
ruleset->styles = g_realloc (ruleset->styles, ruleset->n_styles * sizeof (PropertyValue));
ruleset->styles[i].value = NULL;
ruleset->styles[i].property = property;
}
ruleset->styles[i].value = value;
if (gtk_keep_css_sections)
ruleset->styles[i].section = gtk_css_section_ref (section);
else
ruleset->styles[i].section = NULL;
}
static GtkCssChange
gtk_css_ruleset_get_change (GtkCssRuleset *ruleset)
{
return _gtk_css_selector_tree_match_get_change (ruleset->selector_match);
}
static void
gtk_css_scanner_destroy (GtkCssScanner *scanner)
{
if (scanner->section)
gtk_css_section_unref (scanner->section);
g_object_unref (scanner->provider);
_gtk_css_parser_free (scanner->parser);
g_slice_free (GtkCssScanner, scanner);
}
static void
gtk_css_provider_emit_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
const GError *error)
{
g_signal_emit (provider, css_provider_signals[PARSING_ERROR], 0,
scanner != NULL ? scanner->section : NULL, error);
}
static void
gtk_css_scanner_parser_error (GtkCssParser *parser,
const GError *error,
gpointer user_data)
{
GtkCssScanner *scanner = user_data;
gtk_css_provider_emit_error (scanner->provider,
scanner,
error);
}
static GtkCssScanner *
gtk_css_scanner_new (GtkCssProvider *provider,
GtkCssScanner *parent,
GtkCssSection *section,
GFile *file,
const gchar *text)
{
GtkCssScanner *scanner;
scanner = g_slice_new0 (GtkCssScanner);
g_object_ref (provider);
scanner->provider = provider;
scanner->parent = parent;
if (section)
scanner->section = gtk_css_section_ref (section);
scanner->parser = _gtk_css_parser_new (text,
file,
gtk_css_scanner_parser_error,
scanner);
return scanner;
}
static gboolean
gtk_css_scanner_would_recurse (GtkCssScanner *scanner,
GFile *file)
{
while (scanner)
{
GFile *parser_file = _gtk_css_parser_get_file (scanner->parser);
if (parser_file && g_file_equal (parser_file, file))
return TRUE;
scanner = scanner->parent;
}
return FALSE;
}
static void
gtk_css_scanner_push_section (GtkCssScanner *scanner,
GtkCssSectionType section_type)
{
GtkCssSection *section;
section = _gtk_css_section_new (scanner->section,
section_type,
scanner->parser);
if (scanner->section)
gtk_css_section_unref (scanner->section);
scanner->section = section;
}
static void
gtk_css_scanner_pop_section (GtkCssScanner *scanner,
GtkCssSectionType check_type)
{
GtkCssSection *parent;
g_assert (gtk_css_section_get_section_type (scanner->section) == check_type);
parent = gtk_css_section_get_parent (scanner->section);
if (parent)
gtk_css_section_ref (parent);
_gtk_css_section_end (scanner->section);
gtk_css_section_unref (scanner->section);
scanner->section = parent;
}
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_css_value_unref);
priv->keyframes = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) _gtk_css_value_unref);
}
static void
verify_tree_match_results (GtkCssProvider *provider,
const GtkCssMatcher *matcher,
GPtrArray *tree_rules)
{
#ifdef VERIFY_TREE
GtkCssProviderPrivate *priv = provider->priv;
GtkCssRuleset *ruleset;
gboolean should_match;
int i, j;
for (i = 0; i < priv->rulesets->len; i++)
{
gboolean found = FALSE;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
for (j = 0; j < tree_rules->len; j++)
{
if (ruleset == tree_rules->pdata[j])
{
found = TRUE;
break;
}
}
should_match = _gtk_css_selector_matches (ruleset->selector, matcher);
if (found != !!should_match)
{
g_error ("expected rule '%s' to %s, but it %s\n",
_gtk_css_selector_to_string (ruleset->selector),
should_match ? "match" : "not match",
found ? "matched" : "didn't match");
}
}
#endif
}
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;
WidgetPropertyValue *val;
GPtrArray *tree_rules;
GtkCssMatcher matcher;
gboolean found = FALSE;
gchar *prop_name;
gint i;
if (!_gtk_css_matcher_init (&matcher, path, state))
return FALSE;
tree_rules = _gtk_css_selector_tree_match_all (priv->tree, &matcher);
verify_tree_match_results (css_provider, &matcher, tree_rules);
prop_name = g_strdup_printf ("-%s-%s",
g_type_name (pspec->owner_type),
pspec->name);
for (i = tree_rules->len - 1; i >= 0; i--)
{
GtkCssRuleset *ruleset = tree_rules->pdata[i];
if (ruleset->widget_style == NULL)
continue;
for (val = ruleset->widget_style; val != NULL; val = val->next)
{
if (strcmp (val->name, prop_name) == 0)
{
GtkCssScanner *scanner;
scanner = gtk_css_scanner_new (css_provider,
NULL,
val->section,
val->section != NULL ? gtk_css_section_get_file (val->section) : NULL,
val->value);
found = _gtk_css_style_parse_value (value,
scanner->parser);
gtk_css_scanner_destroy (scanner);
break;
}
}
if (found)
break;
}
g_free (prop_name);
g_ptr_array_free (tree_rules, TRUE);
return found;
}
static void
gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface)
{
iface->get_style_property = gtk_css_provider_get_style_property;
}
static GtkCssValue *
gtk_css_style_provider_get_color (GtkStyleProviderPrivate *provider,
const char *name)
{
GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider);
return g_hash_table_lookup (css_provider->priv->symbolic_colors, name);
}
static GtkCssKeyframes *
gtk_css_style_provider_get_keyframes (GtkStyleProviderPrivate *provider,
const char *name)
{
GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider);
return g_hash_table_lookup (css_provider->priv->keyframes, name);
}
static void
gtk_css_style_provider_lookup (GtkStyleProviderPrivate *provider,
const GtkCssMatcher *matcher,
GtkCssLookup *lookup)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
GtkCssRuleset *ruleset;
guint j;
int i;
GPtrArray *tree_rules;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher);
verify_tree_match_results (css_provider, matcher, tree_rules);
for (i = tree_rules->len - 1; i >= 0; i--)
{
ruleset = tree_rules->pdata[i];
if (ruleset->styles == NULL)
continue;
if (!_gtk_bitmask_intersects (_gtk_css_lookup_get_missing (lookup),
ruleset->set_styles))
continue;
for (j = 0; j < ruleset->n_styles; j++)
{
GtkCssStyleProperty *prop = ruleset->styles[j].property;
guint id = _gtk_css_style_property_get_id (prop);
if (!_gtk_css_lookup_is_missing (lookup, id))
continue;
_gtk_css_lookup_set (lookup,
id,
ruleset->styles[j].section,
ruleset->styles[j].value);
}
if (_gtk_bitmask_is_empty (_gtk_css_lookup_get_missing (lookup)))
break;
}
g_ptr_array_free (tree_rules, TRUE);
}
static GtkCssChange
gtk_css_style_provider_get_change (GtkStyleProviderPrivate *provider,
const GtkCssMatcher *matcher)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
GtkCssChange change = 0;
GPtrArray *tree_rules;
int i;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher);
verify_tree_match_results (css_provider, matcher, tree_rules);
for (i = tree_rules->len - 1; i >= 0; i--)
{
GtkCssRuleset *ruleset;
ruleset = tree_rules->pdata[i];
if (ruleset->styles == NULL)
continue;
change |= gtk_css_ruleset_get_change (ruleset);
}
g_ptr_array_free (tree_rules, TRUE);
return change;
}
static void
gtk_css_style_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface)
{
iface->get_color = gtk_css_style_provider_get_color;
iface->get_keyframes = gtk_css_style_provider_get_keyframes;
iface->lookup = gtk_css_style_provider_lookup;
iface->get_change = gtk_css_style_provider_get_change;
}
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);
_gtk_css_selector_tree_free (priv->tree);
g_hash_table_destroy (priv->symbolic_colors);
g_hash_table_destroy (priv->keyframes);
if (priv->resource)
{
g_resources_unregister (priv->resource);
g_resource_unref (priv->resource);
priv->resource = NULL;
}
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_emit_error (provider,
scanner,
error);
g_error_free (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->styles == 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;
if (priv->resource)
{
g_resources_unregister (priv->resource);
g_resource_unref (priv->resource);
priv->resource = NULL;
}
g_hash_table_remove_all (priv->symbolic_colors);
g_hash_table_remove_all (priv->keyframes);
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);
_gtk_css_selector_tree_free (priv->tree);
priv->tree = NULL;
}
static void
gtk_css_provider_propagate_error (GtkCssProvider *provider,
GtkCssSection *section,
const GError *error,
GError **propagate_to)
{
char *s;
/* don't fail for deprecations */
if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
{
s = _gtk_css_section_to_string (section);
g_warning ("Theme parsing error: %s: %s", s, error->message);
g_free (s);
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);
if (section)
{
s = _gtk_css_section_to_string (section);
g_prefix_error (propagate_to, "%s", s);
g_free (s);
}
}
static gboolean
parse_import (GtkCssScanner *scanner)
{
GFile *file;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_IMPORT);
if (!_gtk_css_parser_try (scanner->parser, "@import", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
return FALSE;
}
if (_gtk_css_parser_is_string (scanner->parser))
{
char *uri;
uri = _gtk_css_parser_read_string (scanner->parser);
file = _gtk_css_parser_get_file_for_path (scanner->parser, uri);
g_free (uri);
}
else
{
file = _gtk_css_parser_read_url (scanner->parser);
}
if (file == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
return TRUE;
}
if (!_gtk_css_parser_try (scanner->parser, ";", FALSE))
{
gtk_css_provider_invalid_token (scanner->provider, scanner, "semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
}
else 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,
NULL);
}
g_object_unref (file);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
_gtk_css_parser_skip_whitespace (scanner->parser);
return TRUE;
}
static gboolean
parse_color_definition (GtkCssScanner *scanner)
{
GtkCssValue *color;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
if (!_gtk_css_parser_try (scanner->parser, "@define-color", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return FALSE;
}
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);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
color = _gtk_css_color_value_parse (scanner->parser);
if (color == NULL)
{
g_free (name);
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
g_free (name);
_gtk_css_value_unref (color);
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);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
g_hash_table_insert (scanner->provider->priv->symbolic_colors, name, color);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
static gboolean
parse_binding_set (GtkCssScanner *scanner)
{
GtkBindingSet *binding_set;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_BINDING_SET);
if (!_gtk_css_parser_try (scanner->parser, "@binding-set", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_BINDING_SET);
return FALSE;
}
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;
}
if (gtk_binding_entry_add_signal_from_string (binding_set, name) != G_TOKEN_NONE)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Failed to parse binding set.");
}
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_begins_with (scanner->parser, ';'))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"Nonstandard semicolon at end of binding set");
_gtk_css_parser_try (scanner->parser, ";", TRUE);
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_BINDING_SET);
return TRUE;
}
static gboolean
parse_keyframes (GtkCssScanner *scanner)
{
GtkCssKeyframes *keyframes;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
if (!_gtk_css_parser_try (scanner->parser, "@keyframes", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
return FALSE;
}
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 keyframes");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
goto exit;
}
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 keyframes");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
g_free (name);
goto exit;
}
keyframes = _gtk_css_keyframes_parse (scanner->parser);
if (keyframes == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_free (name);
goto exit;
}
g_hash_table_insert (scanner->provider->priv->keyframes, name, keyframes);
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);
}
exit:
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
return TRUE;
}
static void
parse_at_keyword (GtkCssScanner *scanner)
{
if (parse_import (scanner))
return;
if (parse_color_definition (scanner))
return;
if (parse_binding_set (scanner))
return;
if (parse_keyframes (scanner))
return;
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 GSList *
parse_selector_list (GtkCssScanner *scanner)
{
GSList *selectors = NULL;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_SELECTOR);
do {
GtkCssSelector *select = _gtk_css_selector_parse (scanner->parser);
if (select == NULL)
{
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_SELECTOR);
return NULL;
}
selectors = g_slist_prepend (selectors, select);
}
while (_gtk_css_parser_try (scanner->parser, ",", TRUE));
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_SELECTOR);
return selectors;
}
static void
parse_declaration (GtkCssScanner *scanner,
GtkCssRuleset *ruleset)
{
GtkStyleProperty *property;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_DECLARATION);
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);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
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);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (property)
{
GtkCssValue *value;
g_free (name);
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_VALUE);
value = _gtk_style_property_parse_value (property,
scanner->parser);
if (value == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (!_gtk_css_parser_begins_with (scanner->parser, ';') &&
!_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,
"Junk at end of value");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
{
GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
guint i;
for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
{
GtkCssStyleProperty *child = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
GtkCssValue *sub = _gtk_css_array_value_get_nth (value, i);
gtk_css_ruleset_add (ruleset, child, _gtk_css_value_ref (sub), scanner->section);
}
_gtk_css_value_unref (value);
}
else if (GTK_IS_CSS_STYLE_PROPERTY (property))
{
gtk_css_ruleset_add (ruleset, GTK_CSS_STYLE_PROPERTY (property), value, scanner->section);
}
else
{
g_assert_not_reached ();
_gtk_css_value_unref (value);
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
}
else if (name[0] == '-')
{
char *value_str;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_VALUE);
value_str = _gtk_css_parser_read_value (scanner->parser);
if (value_str)
{
WidgetPropertyValue *val;
val = widget_property_value_new (name, scanner->section);
val->value = value_str;
gtk_css_ruleset_add_style (ruleset, name, val);
}
else
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
}
else
g_free (name);
check_for_semicolon:
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
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, };
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_RULESET);
selectors = parse_selector_list (scanner);
if (selectors == NULL)
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
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);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
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);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
}
}
css_provider_commit (scanner->provider, selectors, &ruleset);
gtk_css_ruleset_clear (&ruleset);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_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_scanner_push_section (scanner, GTK_CSS_SECTION_DOCUMENT);
_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);
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DOCUMENT);
}
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;
return 0;
}
static void
gtk_css_provider_postprocess (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv = css_provider->priv;
GtkCssSelectorTreeBuilder *builder;
guint i;
g_array_sort (priv->rulesets, gtk_css_provider_compare_rule);
builder = _gtk_css_selector_tree_builder_new ();
for (i = 0; i < priv->rulesets->len; i++)
{
GtkCssRuleset *ruleset;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
_gtk_css_selector_tree_builder_add (builder,
ruleset->selector,
&ruleset->selector_match,
ruleset);
}
priv->tree = _gtk_css_selector_tree_builder_build (builder);
_gtk_css_selector_tree_builder_free (builder);
#ifndef VERIFY_TREE
for (i = 0; i < priv->rulesets->len; i++)
{
GtkCssRuleset *ruleset;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
_gtk_css_selector_free (ruleset->selector);
ruleset->selector = NULL;
}
#endif
}
static gboolean
gtk_css_provider_load_internal (GtkCssProvider *css_provider,
GtkCssScanner *parent,
GFile *file,
const char *text,
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 (text == NULL)
{
GError *load_error = NULL;
if (g_file_load_contents (file, NULL,
&free_data, NULL,
NULL, &load_error))
{
text = free_data;
}
else
{
GtkCssSection *section;
if (parent)
section = gtk_css_section_ref (parent->section);
else
section = _gtk_css_section_new_for_file (GTK_CSS_SECTION_DOCUMENT, file);
gtk_css_provider_error (css_provider,
parent,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_IMPORT,
"Failed to import: %s",
load_error->message);
gtk_css_section_unref (section);
}
}
if (text)
{
scanner = gtk_css_scanner_new (css_provider,
parent,
parent ? parent->section : NULL,
file,
text);
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. If
* @length is not -1, the code will assume it is not NUL terminated and will
* potentially do a copy.
* @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. The return value is deprecated and %FALSE will only be
* returned for backwards compatibility reasons if an @error is not
* %NULL and a loading error occured. To track errors while loading
* CSS, connect to the GtkCssProvider::parsing-error signal.
**/
gboolean
gtk_css_provider_load_from_data (GtkCssProvider *css_provider,
const gchar *data,
gssize length,
GError **error)
{
char *free_data;
gboolean ret;
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);
free_data = NULL;
}
else
{
free_data = g_strndup (data, length);
data = free_data;
}
gtk_css_provider_reset (css_provider);
ret = gtk_css_provider_load_internal (css_provider, NULL, NULL, data, error);
g_free (free_data);
_gtk_style_provider_private_changed (GTK_STYLE_PROVIDER_PRIVATE (css_provider));
return ret;
}
/**
* 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. The return value is deprecated and %FALSE will only be
* returned for backwards compatibility reasons if an @error is not
* %NULL and a loading error occured. To track errors while loading
* CSS, connect to the GtkCssProvider::parsing-error signal.
**/
gboolean
gtk_css_provider_load_from_file (GtkCssProvider *css_provider,
GFile *file,
GError **error)
{
gboolean success;
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);
success = gtk_css_provider_load_internal (css_provider, NULL, file, NULL, error);
_gtk_style_provider_private_changed (GTK_STYLE_PROVIDER_PRIVATE (css_provider));
return success;
}
/**
* 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. The return value is deprecated and %FALSE will only be
* returned for backwards compatibility reasons if an @error is not
* %NULL and a loading error occured. To track errors while loading
* CSS, connect to the GtkCssProvider::parsing-error signal.
**/
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;
}
static void
gtk_css_provider_load_from_resource (GtkCssProvider *css_provider,
const gchar *resource_path)
{
GFile *file;
char *uri, *escaped;
g_return_if_fail (GTK_IS_CSS_PROVIDER (css_provider));
g_return_if_fail (resource_path != NULL);
escaped = g_uri_escape_string (resource_path,
G_URI_RESERVED_CHARS_ALLOWED_IN_PATH, FALSE);
uri = g_strconcat ("resource://", escaped, NULL);
g_free (escaped);
file = g_file_new_for_uri (uri);
g_free (uri);
gtk_css_provider_load_from_file (css_provider, file, NULL);
g_object_unref (file);
}
/**
* 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))
{
provider = gtk_css_provider_new ();
}
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_get_data_prefix (), "share", "themes", NULL);
return path;
}
/**
* _gtk_css_provider_load_named:
* @provider: a #GtkCssProvider
* @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. The actual process of
* finding the theme might change between releases, but it is
* guaranteed that this function uses the same mechanism to load the
* theme than GTK uses for loading its own theme.
**/
void
_gtk_css_provider_load_named (GtkCssProvider *provider,
const gchar *name,
const gchar *variant)
{
gchar *subpath, *path;
gchar *resource_path;
g_return_if_fail (GTK_IS_CSS_PROVIDER (provider));
g_return_if_fail (name != NULL);
gtk_css_provider_reset (provider);
/* try loading the resource for the theme. This is mostly meant for built-in
* themes.
*/
if (variant)
resource_path = g_strdup_printf ("/org/gtk/libgtk/%s-%s.css", name, variant);
else
resource_path = g_strdup_printf ("/org/gtk/libgtk/%s.css", name);
if (g_resources_get_info (resource_path, 0, NULL, NULL, NULL))
{
gtk_css_provider_load_from_resource (provider, resource_path);
g_free (resource_path);
return;
}
g_free (resource_path);
/* Next try looking for files in the various theme directories.
*/
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 user's config directory
*/
path = g_build_filename (g_get_user_data_dir (), "themes", name, subpath, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
g_free (path);
/* Next look in the user's home directory
*/
path = g_build_filename (g_get_home_dir (), ".themes", name, subpath, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
gchar *theme_dir;
g_free (path);
/* Finally, try in the default theme directory */
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)
{
char *dir, *resource_file;
GResource *resource;
dir = g_path_get_dirname (path);
resource_file = g_build_filename (dir, "gtk.gresource", NULL);
resource = g_resource_load (resource_file, NULL);
g_free (resource_file);
if (resource != NULL)
g_resources_register (resource);
gtk_css_provider_load_from_path (provider, path, NULL);
/* Only set this after load, as load_from_path will clear it */
provider->priv->resource = resource;
g_free (path);
g_free (dir);
}
else
{
/* Things failed! Fall back! Fall back! */
if (variant)
{
/* If there was a variant, try without */
_gtk_css_provider_load_named (provider, name, NULL);
}
else
{
/* Worst case, fall back to Raleigh */
g_return_if_fail (!g_str_equal (name, "Raleigh")); /* infloop protection */
_gtk_css_provider_load_named (provider, "Raleigh", NULL);
}
}
}
/**
* 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 (variant == NULL)
key = g_strdup (name);
else
key = g_strconcat (name, "-", variant, NULL);
if (G_UNLIKELY (!themes))
themes = g_hash_table_new (g_str_hash, g_str_equal);
provider = g_hash_table_lookup (themes, key);
if (!provider)
{
provider = gtk_css_provider_new ();
_gtk_css_provider_load_named (provider, name, variant);
g_hash_table_insert (themes, g_strdup (key), provider);
}
g_free (key);
return provider;
}
static int
compare_properties (gconstpointer a, gconstpointer b, gpointer style)
{
const guint *ua = a;
const guint *ub = b;
PropertyValue *styles = style;
return strcmp (_gtk_style_property_get_name (GTK_STYLE_PROPERTY (styles[*ua].property)),
_gtk_style_property_get_name (GTK_STYLE_PROPERTY (styles[*ub].property)));
}
static int
compare_names (gconstpointer a, gconstpointer b)
{
const WidgetPropertyValue *aa = a;
const WidgetPropertyValue *bb = b;
return strcmp (aa->name, bb->name);
}
static void
gtk_css_ruleset_print (const GtkCssRuleset *ruleset,
GString *str)
{
GList *values, *walk;
WidgetPropertyValue *widget_value;
guint i;
_gtk_css_selector_tree_match_print (ruleset->selector_match, str);
g_string_append (str, " {\n");
if (ruleset->styles)
{
guint *sorted = g_new (guint, ruleset->n_styles);
for (i = 0; i < ruleset->n_styles; i++)
sorted[i] = i;
/* so the output is identical for identical selector styles */
g_qsort_with_data (sorted, ruleset->n_styles, sizeof (guint), compare_properties, ruleset->styles);
for (i = 0; i < ruleset->n_styles; i++)
{
PropertyValue *prop = &ruleset->styles[sorted[i]];
g_string_append (str, " ");
g_string_append (str, _gtk_style_property_get_name (GTK_STYLE_PROPERTY (prop->property)));
g_string_append (str, ": ");
_gtk_css_value_print (prop->value, str);
g_string_append (str, ";\n");
}
g_free (sorted);
}
if (ruleset->widget_style)
{
values = NULL;
for (widget_value = ruleset->widget_style; widget_value != NULL; widget_value = widget_value->next)
values = g_list_prepend (values, widget_value);
/* so the output is identical for identical selector styles */
values = g_list_sort (values, compare_names);
for (walk = values; walk; walk = walk->next)
{
widget_value = walk->data;
g_string_append (str, " ");
g_string_append (str, widget_value->name);
g_string_append (str, ": ");
g_string_append (str, widget_value->value);
g_string_append (str, ";\n");
}
g_list_free (values);
}
g_string_append (str, "}\n");
}
static void
gtk_css_provider_print_colors (GHashTable *colors,
GString *str)
{
GList *keys, *walk;
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;
GtkCssValue *color = g_hash_table_lookup (colors, (gpointer) name);
g_string_append (str, "@define-color ");
g_string_append (str, name);
g_string_append (str, " ");
_gtk_css_value_print (color, str);
g_string_append (str, ";\n");
}
g_list_free (keys);
}
static void
gtk_css_provider_print_keyframes (GHashTable *keyframes,
GString *str)
{
GList *keys, *walk;
keys = g_hash_table_get_keys (keyframes);
/* 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;
GtkCssKeyframes *keyframe = g_hash_table_lookup (keyframes, (gpointer) name);
if (str->len > 0)
g_string_append (str, "\n");
g_string_append (str, "@keyframes ");
g_string_append (str, name);
g_string_append (str, " {\n");
_gtk_css_keyframes_print (keyframe, str);
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.
*
* Since: 3.2
**/
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);
gtk_css_provider_print_keyframes (priv->keyframes, str);
for (i = 0; i < priv->rulesets->len; i++)
{
if (str->len != 0)
g_string_append (str, "\n");
gtk_css_ruleset_print (&g_array_index (priv->rulesets, GtkCssRuleset, i), str);
}
return g_string_free (str, FALSE);
}
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